# vim:ft=zsh ts=2 sw=2 sts=2 et fenc=utf-8
################################################################
# powerlevel9k Theme
# https://github.com/bhilburn/powerlevel9k
#
# This theme was inspired by agnoster's Theme:
# https://gist.github.com/3712874
################################################################

################################################################
# For basic documentation, please refer to the README.md in the top-level
# directory. For more detailed documentation, refer to the project wiki, hosted
# on Github: https://github.com/bhilburn/powerlevel9k/wiki
#
# There are a lot of easy ways you can customize your prompt segments and
# theming with simple variables defined in your `~/.zshrc`.
################################################################

## Turn on for Debugging
#zstyle ':vcs_info:*+*:*' debug true
#set -o xtrace

# Try to set the installation path
if [[ -n "$POWERLEVEL9K_INSTALLATION_PATH" ]]; then
  # If an installation path was set manually,
  # it should trump any other location found.
  # Do nothing. This is all right, as we use the
  # POWERLEVEL9K_INSTALLATION_PATH for further processing.
elif [[ $(whence -w prompt_powerlevel9k_setup) =~ "function" ]]; then
  # Check if the theme was called as a function (e.g., from prezto)
  autoload -U is-at-least
  if is-at-least 5.0.8; then
    # Try to find the correct path of the script.
    POWERLEVEL9K_INSTALLATION_PATH=$(whence -v $0 | sed "s/$0 is a shell function from //")
  elif [[ -f "${ZDOTDIR:-$HOME}/.zprezto/modules/prompt/init.zsh" ]]; then
    # If there is an prezto installation, we assume that powerlevel9k is linked there.
    POWERLEVEL9K_INSTALLATION_PATH="${ZDOTDIR:-$HOME}/.zprezto/modules/prompt/functions/prompt_powerlevel9k_setup"
  fi
else
  # Last resort: Set installation path is script path
  POWERLEVEL9K_INSTALLATION_PATH="$0"
fi

# Resolve the installation path
if [[ -L "$POWERLEVEL9K_INSTALLATION_PATH" ]]; then
  # If this theme is sourced as a symlink, we need to locate the real URL
  filename="${POWERLEVEL9K_INSTALLATION_PATH:A}"
elif [[ -d "$POWERLEVEL9K_INSTALLATION_PATH" ]]; then
  # Directory
  filename="${POWERLEVEL9K_INSTALLATION_PATH}/powerlevel9k.zsh-theme"
elif [[ -f "$POWERLEVEL9K_INSTALLATION_PATH" ]]; then
  # Script is a file
  filename="$POWERLEVEL9K_INSTALLATION_PATH"
elif [[ -z "$POWERLEVEL9K_INSTALLATION_PATH" ]]; then
  # Fallback: specify an installation path!
  print -P "%F{red}We could not locate the installation path of powerlevel9k.%f"
  print -P "Please specify by setting %F{blue}POWERLEVEL9K_INSTALLATION_PATH%f (full path incl. file name) at the very beginning of your ~/.zshrc"
  return 1
else
  print -P "%F{red}Script location could not be found! Maybe your %F{blue}POWERLEVEL9K_INSTALLATION_PATH%F{red} is not correct?%f"
  return 1
fi
script_location="$(dirname $filename)"

################################################################
# Source icon functions
################################################################

source $script_location/functions/icons.zsh

################################################################
# Source utility functions
################################################################

source $script_location/functions/utilities.zsh

################################################################
# Source color functions
################################################################

source $script_location/functions/colors.zsh

################################################################
# Source VCS_INFO hooks / helper functions
################################################################

source $script_location/functions/vcs.zsh

################################################################
# Color Scheme
################################################################

if [[ "$POWERLEVEL9K_COLOR_SCHEME" == "light" ]]; then
  DEFAULT_COLOR=white
  DEFAULT_COLOR_INVERTED=black
else
  DEFAULT_COLOR=black
  DEFAULT_COLOR_INVERTED=white
fi

################################################################
# Prompt Segment Constructors
#
# Methodology behind user-defined variables overwriting colors:
#     The first parameter to the segment constructors is the calling function's
#     name. From this function name, we strip the "prompt_"-prefix and
#     uppercase it. This is then prefixed with "POWERLEVEL9K_" and suffixed
#     with either "_BACKGROUND" or "_FOREGROUND", thus giving us the variable
#     name. So each new segment is user-overwritten by a variable following
#     this naming convention.
################################################################

# The `CURRENT_BG` variable is used to remember what the last BG color used was
# when building the left-hand prompt. Because the RPROMPT is created from
# right-left but reads the opposite, this isn't necessary for the other side.
CURRENT_BG='NONE'

# Begin a left prompt segment
# Takes four arguments:
#   * $1: Name of the function that was originally invoked (mandatory).
#         Necessary, to make the dynamic color-overwrite mechanism work.
#   * $2: The array index of the current segment
#   * $3: Background color
#   * $4: Foreground color
#   * $5: The segment content
#   * $6: An identifying icon (must be a key of the icons array)
# The latter three can be omitted,
set_default last_left_element_index 1
set_default POWERLEVEL9K_WHITESPACE_BETWEEN_LEFT_SEGMENTS " "
left_prompt_segment() {
  local current_index=$2
  # Check if the segment should be joined with the previous one
  local joined
  segmentShouldBeJoined $current_index $last_left_element_index "$POWERLEVEL9K_LEFT_PROMPT_ELEMENTS" && joined=true || joined=false

  # Overwrite given background-color by user defined variable for this segment.
  local BACKGROUND_USER_VARIABLE=POWERLEVEL9K_${(U)1#prompt_}_BACKGROUND
  local BG_COLOR_MODIFIER=${(P)BACKGROUND_USER_VARIABLE}
  [[ -n $BG_COLOR_MODIFIER ]] && 3="$BG_COLOR_MODIFIER"

  # Overwrite given foreground-color by user defined variable for this segment.
  local FOREGROUND_USER_VARIABLE=POWERLEVEL9K_${(U)1#prompt_}_FOREGROUND
  local FG_COLOR_MODIFIER=${(P)FOREGROUND_USER_VARIABLE}
  [[ -n $FG_COLOR_MODIFIER ]] && 4="$FG_COLOR_MODIFIER"

  local bg fg
  [[ -n "$3" ]] && bg="%K{$3}" || bg="%k"
  [[ -n "$4" ]] && fg="%F{$4}" || fg="%f"

  if [[ $CURRENT_BG != 'NONE' ]] && ! isSameColor "$3" "$CURRENT_BG"; then
    echo -n "$bg%F{$CURRENT_BG}"
    if [[ $joined == false ]]; then
      # Middle segment
      echo -n "$(print_icon 'LEFT_SEGMENT_SEPARATOR')$POWERLEVEL9K_WHITESPACE_BETWEEN_LEFT_SEGMENTS"
    fi
  elif isSameColor "$CURRENT_BG" "$3"; then
    # Middle segment with same color as previous segment
    # We take the current foreground color as color for our
    # subsegment (or the default color). This should have
    # enough contrast.
    local complement
    [[ -n "$4" ]] && complement="$4" || complement=$DEFAULT_COLOR
    echo -n "$bg%F{$complement}"
    if [[ $joined == false ]]; then
      echo -n "$(print_icon 'LEFT_SUBSEGMENT_SEPARATOR')$POWERLEVEL9K_WHITESPACE_BETWEEN_LEFT_SEGMENTS"
    fi
  else
    # First segment
    echo -n "${bg}$POWERLEVEL9K_WHITESPACE_BETWEEN_LEFT_SEGMENTS"
  fi

  local visual_identifier
  if [[ -n $6 ]]; then
    visual_identifier="$(print_icon $6)"
    if [[ -n "$visual_identifier" ]]; then
      # Allow users to overwrite the color for the visual identifier only.
      local visual_identifier_color_variable=POWERLEVEL9K_${(U)1#prompt_}_VISUAL_IDENTIFIER_COLOR
      set_default $visual_identifier_color_variable $4
      visual_identifier="%F{${(P)visual_identifier_color_variable}%}$visual_identifier%f"
      # Add an whitespace if we print more than just the visual identifier
      [[ -n "$5" ]] && visual_identifier="$visual_identifier "
    fi
  fi

  # Print the visual identifier
  echo -n "${visual_identifier}"
  # Print the content of the segment, if there is any
  [[ -n "$5" ]] && echo -n "${fg}${5}"
  echo -n "${POWERLEVEL9K_WHITESPACE_BETWEEN_LEFT_SEGMENTS}"

  CURRENT_BG=$3
  last_left_element_index=$current_index
}

# End the left prompt, closes the final segment.
left_prompt_end() {
  if [[ -n $CURRENT_BG ]]; then
    echo -n "%k%F{$CURRENT_BG}$(print_icon 'LEFT_SEGMENT_SEPARATOR')"
  else
    echo -n "%k"
  fi
  echo -n "%f$(print_icon 'LEFT_SEGMENT_END_SEPARATOR')"
  CURRENT_BG=''
}

CURRENT_RIGHT_BG='NONE'

# Begin a right prompt segment
# Takes four arguments:
#   * $1: Name of the function that was originally invoked (mandatory).
#         Necessary, to make the dynamic color-overwrite mechanism work.
#   * $2: The array index of the current segment
#   * $3: Background color
#   * $4: Foreground color
#   * $5: The segment content
#   * $6: An identifying icon (must be a key of the icons array)
# No ending for the right prompt segment is needed (unlike the left prompt, above).
set_default last_right_element_index 1
set_default POWERLEVEL9K_WHITESPACE_BETWEEN_RIGHT_SEGMENTS " "
right_prompt_segment() {
  local current_index=$2

  # Check if the segment should be joined with the previous one
  local joined
  segmentShouldBeJoined $current_index $last_right_element_index "$POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS" && joined=true || joined=false

  # Overwrite given background-color by user defined variable for this segment.
  local BACKGROUND_USER_VARIABLE=POWERLEVEL9K_${(U)1#prompt_}_BACKGROUND
  local BG_COLOR_MODIFIER=${(P)BACKGROUND_USER_VARIABLE}
  [[ -n $BG_COLOR_MODIFIER ]] && 3="$BG_COLOR_MODIFIER"

  # Overwrite given foreground-color by user defined variable for this segment.
  local FOREGROUND_USER_VARIABLE=POWERLEVEL9K_${(U)1#prompt_}_FOREGROUND
  local FG_COLOR_MODIFIER=${(P)FOREGROUND_USER_VARIABLE}
  [[ -n $FG_COLOR_MODIFIER ]] && 4="$FG_COLOR_MODIFIER"

  local bg fg
  [[ -n "$3" ]] && bg="%K{$3}" || bg="%k"
  [[ -n "$4" ]] && fg="%F{$4}" || fg="%f"

  # If CURRENT_RIGHT_BG is "NONE", we are the first right segment.
  if [[ $joined == false ]] || [[ "$CURRENT_RIGHT_BG" == "NONE" ]]; then
    if isSameColor "$CURRENT_RIGHT_BG" "$3"; then
      # Middle segment with same color as previous segment
      # We take the current foreground color as color for our
      # subsegment (or the default color). This should have
      # enough contrast.
      local complement
      [[ -n "$4" ]] && complement="$4" || complement=$DEFAULT_COLOR
      echo -n "%F{$complement}$(print_icon 'RIGHT_SUBSEGMENT_SEPARATOR')%f"
    else
      echo -n "%F{$3}$(print_icon 'RIGHT_SEGMENT_SEPARATOR')%f"
    fi
  fi

  local visual_identifier
  if [[ -n "$6" ]]; then
    visual_identifier="$(print_icon $6)"
    if [[ -n "$visual_identifier" ]]; then
      # Allow users to overwrite the color for the visual identifier only.
      local visual_identifier_color_variable=POWERLEVEL9K_${(U)1#prompt_}_VISUAL_IDENTIFIER_COLOR
      set_default $visual_identifier_color_variable $4
      visual_identifier="%F{${(P)visual_identifier_color_variable}%}$visual_identifier%f"
      # Add an whitespace if we print more than just the visual identifier
      [[ -n "$5" ]] && visual_identifier=" $visual_identifier"
    fi
  fi

  echo -n "${bg}${fg}"

  # Print whitespace only if segment is not joined or first right segment
  [[ $joined == false ]] || [[ "$CURRENT_RIGHT_BG" == "NONE" ]] && echo -n "${POWERLEVEL9K_WHITESPACE_BETWEEN_RIGHT_SEGMENTS}"

  # Print segment content if there is any
  [[ -n "$5" ]] && echo -n "${5}"
  # Print the visual identifier
  echo -n "${visual_identifier}${POWERLEVEL9K_WHITESPACE_BETWEEN_RIGHT_SEGMENTS}%f"

  CURRENT_RIGHT_BG=$3
  last_right_element_index=$current_index
}

################################################################
# Prompt Segment Definitions
################################################################

# The `CURRENT_BG` variable is used to remember what the last BG color used was
# when building the left-hand prompt. Because the RPROMPT is created from
# right-left but reads the opposite, this isn't necessary for the other side.
CURRENT_BG='NONE'

# Anaconda Environment
prompt_anaconda() {
  # Depending on the conda version, either might be set. This
  # variant works even if both are set.
  _path=$CONDA_ENV_PATH$CONDA_PREFIX
  if ! [ -z "$_path" ]; then
    # config - can be overwritten in users' zshrc file.
    set_default POWERLEVEL9K_ANACONDA_LEFT_DELIMITER "("
    set_default POWERLEVEL9K_ANACONDA_RIGHT_DELIMITER ")"
    "$1_prompt_segment" "$0" "$2" "blue" "$DEFAULT_COLOR" "$POWERLEVEL9K_ANACONDA_LEFT_DELIMITER$(basename $_path)$POWERLEVEL9K_ANACONDA_RIGHT_DELIMITER" 'PYTHON_ICON'
  fi
}

# AWS Profile
prompt_aws() {
  local aws_profile="$AWS_DEFAULT_PROFILE"

  if [[ -n "$aws_profile" ]]; then
    "$1_prompt_segment" "$0" "$2" red white "$aws_profile" 'AWS_ICON'
  fi
}

# Current Elastic Beanstalk environment
prompt_aws_eb_env() {
  local eb_env=$(grep environment .elasticbeanstalk/config.yml 2> /dev/null | awk '{print $2}')

  if [[ -n "$eb_env" ]]; then
    "$1_prompt_segment" "$0" "$2" black green "$eb_env" 'AWS_EB_ICON'
  fi
}

# Segment to indicate background jobs with an icon.
set_default POWERLEVEL9K_BACKGROUND_JOBS_VERBOSE true
prompt_background_jobs() {
  local background_jobs_number=${$(jobs -l | wc -l)// /}
  local wrong_lines=`jobs -l | awk '/pwd now/{ count++ } END {print count}'`
  if [[ wrong_lines -gt 0 ]]; then
     background_jobs_number=$(( $background_jobs_number - $wrong_lines ))
  fi
  if [[ background_jobs_number -gt 0 ]]; then
    local background_jobs_number_print=""
    if [[ "$POWERLEVEL9K_BACKGROUND_JOBS_VERBOSE" == "true" ]] && [[ "$background_jobs_number" -gt 1 ]]; then
      background_jobs_number_print="$background_jobs_number"
    fi
    "$1_prompt_segment" "$0" "$2" "$DEFAULT_COLOR" "cyan" "$background_jobs_number_print" 'BACKGROUND_JOBS_ICON'
  fi
}

# Segment that indicates usage level of current partition.
set_default POWERLEVEL9K_DISK_USAGE_ONLY_WARNING false
set_default POWERLEVEL9K_DISK_USAGE_WARNING_LEVEL 90
set_default POWERLEVEL9K_DISK_USAGE_CRITICAL_LEVEL 95
prompt_disk_usage() {
  local current_state="unknown"
  typeset -AH hdd_usage_forecolors
  hdd_usage_forecolors=(
    'normal'        'yellow'
    'warning'       "$DEFAULT_COLOR"
    'critical'      'white'
  )
  typeset -AH hdd_usage_backcolors
  hdd_usage_backcolors=(
    'normal'        $DEFAULT_COLOR
    'warning'       'yellow'
    'critical'      'red'
  )

  local disk_usage="${$(\df -P . | sed -n '2p' | awk '{ print $5 }')%%\%}"

  if [ "$disk_usage" -ge "$POWERLEVEL9K_DISK_USAGE_WARNING_LEVEL" ]; then
    current_state='warning'
    if [ "$disk_usage" -ge "$POWERLEVEL9K_DISK_USAGE_CRITICAL_LEVEL" ]; then
        current_state='critical'
    fi
  else
    if [[ "$POWERLEVEL9K_DISK_USAGE_ONLY_WARNING" == true ]]; then
        current_state=''
        return
    fi
    current_state='normal'
  fi

  local message="${disk_usage}%%"

  # Draw the prompt_segment
  if [[ -n $disk_usage ]]; then
    "$1_prompt_segment" "${0}_${current_state}" "$2" "${hdd_usage_backcolors[$current_state]}" "${hdd_usage_forecolors[$current_state]}" "$message" 'DISK_ICON'
  fi
}

prompt_battery() {
  # The battery can have four different states - default to 'unknown'.
  local current_state='unknown'
  typeset -AH battery_states
  battery_states=(
    'low'           'red'
    'charging'      'yellow'
    'charged'       'green'
    'disconnected'  "$DEFAULT_COLOR_INVERTED"
  )
  # Set default values if the user did not configure them
  set_default POWERLEVEL9K_BATTERY_LOW_THRESHOLD  10

  if [[ $OS =~ OSX && -f /usr/bin/pmset && -x /usr/bin/pmset ]]; then
    # obtain battery information from system
    local raw_data="$(pmset -g batt | awk 'FNR==2{print}')"
    # return if there is no battery on system
    [[ -z $(echo $raw_data | grep "InternalBattery") ]] && return

    # Time remaining on battery operation (charging/discharging)
    local tstring=$(echo $raw_data | awk -F ';' '{print $3}' | awk '{print $1}')
    # If time has not been calculated by system yet
    [[ $tstring =~ '(\(no|not)' ]] && tstring="..."

    # percent of battery charged
    typeset -i 10 bat_percent
    bat_percent=$(echo $raw_data | grep -o '[0-9]*%' | sed 's/%//')

    local remain=""
    # Logic for string output
    case $(echo $raw_data | awk -F ';' '{print $2}' | awk '{$1=$1};1') in
      # for a short time after attaching power, status will be 'AC attached;'
      'charging'|'finishing charge'|'AC attached')
        current_state="charging"
        remain=" ($tstring)"
        ;;
      'discharging')
        [[ $bat_percent -lt $POWERLEVEL9K_BATTERY_LOW_THRESHOLD ]] && current_state="low" || current_state="disconnected"
        remain=" ($tstring)"
        ;;
      *)
        current_state="charged"
        ;;
    esac
  fi

  if [[ "$OS" == 'Linux' ]] || [[ "$OS" == 'Android' ]]; then
    local sysp="/sys/class/power_supply"

    # Reported BAT0 or BAT1 depending on kernel version
    [[ -a $sysp/BAT0 ]] && local bat=$sysp/BAT0
    [[ -a $sysp/BAT1 ]] && local bat=$sysp/BAT1

    # Android-related
    # Tested on: Moto G falcon (CM 13.0)
    [[ -a $sysp/battery ]] && local bat=$sysp/battery

    # Return if no battery found
    [[ -z $bat ]] && return
    local capacity=$(cat $bat/capacity)
    local battery_status=$(cat $bat/status)
    [[ $capacity -gt 100 ]] && local bat_percent=100 || local bat_percent=$capacity
    [[ $battery_status =~ Charging || $battery_status =~ Full ]] && local connected=true
    if [[ -z  $connected ]]; then
      [[ $bat_percent -lt $POWERLEVEL9K_BATTERY_LOW_THRESHOLD ]] && current_state="low" || current_state="disconnected"
    else
      [[ $bat_percent =~ 100 ]] && current_state="charged"
      [[ $bat_percent -lt 100 ]] && current_state="charging"
    fi
    if [[ -f /usr/bin/acpi ]]; then
      local time_remaining=$(acpi | awk '{ print $5 }')
      if [[ $time_remaining =~ rate ]]; then
        local tstring="..."
      elif [[ $time_remaining =~ "[[:digit:]]+" ]]; then
        local tstring=${(f)$(date -u -d "$(echo $time_remaining)" +%k:%M 2> /dev/null)}
      fi
    fi
    [[ -n $tstring ]] && local remain=" ($tstring)"
  fi

  local message
  # Default behavior: Be verbose!
  set_default POWERLEVEL9K_BATTERY_VERBOSE true
  if [[ "$POWERLEVEL9K_BATTERY_VERBOSE" == true ]]; then
    message="$bat_percent%%$remain"
  else
    message="$bat_percent%%"
  fi

  # Draw the prompt_segment
  if [[ -n $bat_percent ]]; then
    "$1_prompt_segment" "${0}_${current_state}" "$2" "$DEFAULT_COLOR" "${battery_states[$current_state]}" "$message" 'BATTERY_ICON'
  fi
}

# Public IP segment
# Parameters:
#   * $1 Alignment: string - left|right
#   * $2 Index: integer
#   * $3 Joined: bool - If the segment should be joined
prompt_public_ip() {
  # set default values for segment
  set_default POWERLEVEL9K_PUBLIC_IP_TIMEOUT "300"
  set_default POWERLEVEL9K_PUBLIC_IP_NONE ""
  set_default POWERLEVEL9K_PUBLIC_IP_FILE "/tmp/p9k_public_ip"
  set_default POWERLEVEL9K_PUBLIC_IP_HOST "http://ident.me"
  defined POWERLEVEL9K_PUBLIC_IP_METHODS || POWERLEVEL9K_PUBLIC_IP_METHODS=(dig curl wget)

  # Do we need a fresh IP?
  local refresh_ip=false
  if [[ -f $POWERLEVEL9K_PUBLIC_IP_FILE ]]; then
    typeset -i timediff
    # if saved IP is more than
    timediff=$(($(date +%s) - $(date -r $POWERLEVEL9K_PUBLIC_IP_FILE +%s)))
    [[ $timediff -gt $POWERLEVEL9K_PUBLIC_IP_TIMEOUT ]] && refresh_ip=true
    # If tmp file is empty get a fresh IP
    [[ -z $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) ]] && refresh_ip=true
    [[ -n $POWERLEVEL9K_PUBLIC_IP_NONE ]] && [[ $(cat $POWERLEVEL9K_PUBLIC_IP_FILE) =~ "$POWERLEVEL9K_PUBLIC_IP_NONE" ]] && refresh_ip=true
  else
    touch $POWERLEVEL9K_PUBLIC_IP_FILE && refresh_ip=true
  fi

  # grab a fresh IP if needed
  local fresh_ip
  if [[ $refresh_ip =~ true && -w $POWERLEVEL9K_PUBLIC_IP_FILE ]]; then
    for method in "${POWERLEVEL9K_PUBLIC_IP_METHODS[@]}"; do
      case $method in
        'dig')
            fresh_ip="$(dig +time=1 +tries=1 +short myip.opendns.com @resolver1.opendns.com 2> /dev/null)"
            [[ "$fresh_ip" =~ ^\; ]] && unset fresh_ip
          ;;
        'curl')
            fresh_ip="$(curl --max-time 10 -w '\n' "$POWERLEVEL9K_PUBLIC_IP_HOST" 2> /dev/null)"
          ;;
        'wget')
            fresh_ip="$(wget -T 10 -qO- "$POWERLEVEL9K_PUBLIC_IP_HOST" 2> /dev/null)"
          ;;
      esac
      # If we found a fresh IP, break loop.
      if [[ -n "${fresh_ip}" ]]; then
        break;
      fi
    done

    # write IP to tmp file or clear tmp file if an IP was not retrieved
    # Redirection with `>!`. From the manpage: Same as >, except that the file
    #   is truncated to zero length if it exists, even if CLOBBER is unset.
    # If the file already exists, and a simple `>` redirection and CLOBBER
    # unset, ZSH will produce an error.
    [[ -n "${fresh_ip}" ]] && echo $fresh_ip >! $POWERLEVEL9K_PUBLIC_IP_FILE || echo $POWERLEVEL9K_PUBLIC_IP_NONE >! $POWERLEVEL9K_PUBLIC_IP_FILE
  fi

  # read public IP saved to tmp file
  local public_ip="$(cat $POWERLEVEL9K_PUBLIC_IP_FILE)"

  # Draw the prompt segment
  if [[ -n $public_ip ]]; then
    $1_prompt_segment "$0" "$2" "$DEFAULT_COLOR" "$DEFAULT_COLOR_INVERTED" "${public_ip}" 'PUBLIC_IP_ICON'
  fi
}

# Context: user@hostname (who am I and where am I)
# Note that if $DEFAULT_USER is not set, this prompt segment will always print
set_default POWERLEVEL9K_ALWAYS_SHOW_CONTEXT false
set_default POWERLEVEL9K_ALWAYS_SHOW_USER false
set_default POWERLEVEL9K_CONTEXT_TEMPLATE "%n@%m"
prompt_context() {
  local current_state="DEFAULT"
  typeset -AH context_states
  context_states=(
    "ROOT"      "yellow"
    "DEFAULT"   "011"
  )

  local content=""

  if [[ "$POWERLEVEL9K_ALWAYS_SHOW_CONTEXT" == true ]] || [[ "$USER" != "$DEFAULT_USER" ]] || [[ -n "$SSH_CLIENT" || -n "$SSH_TTY" ]]; then

      if [[ $(print -P "%#") == '#' ]]; then
        current_state="ROOT"
      fi

      content="${POWERLEVEL9K_CONTEXT_TEMPLATE}"

  elif [[ "$POWERLEVEL9K_ALWAYS_SHOW_USER" == true ]]; then
      content="$USER"
  else
      return
  fi

  "$1_prompt_segment" "${0}_${current_state}" "$2" "$DEFAULT_COLOR" "${context_states[$current_state]}" "${content}"
}

# The 'custom` prompt provides a way for users to invoke commands and display
# the output in a segment.
prompt_custom() {
  local command=POWERLEVEL9K_CUSTOM_$3:u
  local segment_content="$(eval ${(P)command})"

  if [[ -n $segment_content ]]; then
    "$1_prompt_segment" "${0}_${3:u}" "$2" $DEFAULT_COLOR_INVERTED $DEFAULT_COLOR "$segment_content"
  fi
}

# Display the duration the command needed to run.
prompt_command_execution_time() {
  set_default POWERLEVEL9K_COMMAND_EXECUTION_TIME_THRESHOLD 3
  set_default POWERLEVEL9K_COMMAND_EXECUTION_TIME_PRECISION 2

  # Print time in human readable format
  # For that use `strftime` and convert
  # the duration (float) to an seconds
  # (integer).
  # See http://unix.stackexchange.com/a/89748
  local humanReadableDuration
  if (( _P9K_COMMAND_DURATION > 3600 )); then
    humanReadableDuration=$(TZ=GMT; strftime '%H:%M:%S' $(( int(rint(_P9K_COMMAND_DURATION)) )))
  elif (( _P9K_COMMAND_DURATION > 60 )); then
    humanReadableDuration=$(TZ=GMT; strftime '%M:%S' $(( int(rint(_P9K_COMMAND_DURATION)) )))
  else
    # If the command executed in seconds, print as float.
    # Convert to float
    if [[ "${POWERLEVEL9K_COMMAND_EXECUTION_TIME_PRECISION}" == "0" ]]; then
      # If user does not want microseconds, then we need to convert
      # the duration to an integer.
      typeset -i humanReadableDuration
    else
      typeset -F ${POWERLEVEL9K_COMMAND_EXECUTION_TIME_PRECISION} humanReadableDuration
    fi
    humanReadableDuration=$_P9K_COMMAND_DURATION
  fi

  if (( _P9K_COMMAND_DURATION >= POWERLEVEL9K_COMMAND_EXECUTION_TIME_THRESHOLD )); then
    "$1_prompt_segment" "$0" "$2" "red" "226" "${humanReadableDuration}" 'EXECUTION_TIME_ICON'
  fi
}

# Dir: current working directory
set_default POWERLEVEL9K_DIR_PATH_SEPARATOR "/"
set_default POWERLEVEL9K_HOME_FOLDER_ABBREVIATION "~"
prompt_dir() {
  local current_path="$(print -P "%~")"
  if [[ -n "$POWERLEVEL9K_SHORTEN_DIR_LENGTH" || "$POWERLEVEL9K_SHORTEN_STRATEGY" == "truncate_with_folder_marker" ]]; then
    set_default POWERLEVEL9K_SHORTEN_DELIMITER $'\U2026'

    case "$POWERLEVEL9K_SHORTEN_STRATEGY" in
      truncate_middle)
        current_path=$(pwd | sed -e "s,^$HOME,~," | sed $SED_EXTENDED_REGEX_PARAMETER "s/([^/]{$POWERLEVEL9K_SHORTEN_DIR_LENGTH})[^/]+([^/]{$POWERLEVEL9K_SHORTEN_DIR_LENGTH})\//\1$POWERLEVEL9K_SHORTEN_DELIMITER\2\//g")
      ;;
      truncate_from_right)
        current_path=$(truncatePathFromRight "$(pwd | sed -e "s,^$HOME,~,")" )
      ;;
      truncate_with_package_name)
        local name repo_path package_path current_dir zero

        # Get the path of the Git repo, which should have the package.json file
        if [[ $(git rev-parse --is-inside-work-tree 2> /dev/null) == "true" ]]; then
          # Get path from the root of the git repository to the current dir
          local gitPath=$(git rev-parse --show-prefix)
          # Remove trailing slash from git path, so that we can
          # remove that git path from the pwd.
          gitPath=${gitPath%/}
          package_path=${$(pwd)%%$gitPath}
          # Remove trailing slash
          package_path=${package_path%/}
        elif [[ $(git rev-parse --is-inside-git-dir 2> /dev/null) == "true" ]]; then
          package_path=${$(pwd)%%/.git*}
        fi

        # Replace the shortest possible match of the marked folder from
        # the current path. Remove the amount of characters up to the
        # folder marker from the left. Count only the visible characters
        # in the path (this is done by the "zero" pattern; see
        # http://stackoverflow.com/a/40855342/5586433).
        local zero='%([BSUbfksu]|([FB]|){*})'
        current_dir=$(pwd)
        # Then, find the length of the package_path string, and save the
        # subdirectory path as a substring of the current directory's path from 0
        # to the length of the package path's string
        subdirectory_path=$(truncatePathFromRight "${current_dir:${#${(S%%)package_path//$~zero/}}}")
        # Parse the 'name' from the package.json; if there are any problems, just
        # print the file path
        defined POWERLEVEL9K_DIR_PACKAGE_FILES || POWERLEVEL9K_DIR_PACKAGE_FILES=(package.json composer.json)

        local pkgFile="unknown"
        for file in "${POWERLEVEL9K_DIR_PACKAGE_FILES[@]}"; do
          if [[ -f "${package_path}/${file}" ]]; then
            pkgFile="${package_path}/${file}"
            break;
          fi
        done

        local packageName=$(jq '.name' ${pkgFile} 2> /dev/null \
          || node -e 'console.log(require(process.argv[1]).name);' ${pkgFile} 2>/dev/null \
          || cat "${pkgFile}" 2> /dev/null | grep -m 1 "\"name\"" | awk -F ':' '{print $2}' | awk -F '"' '{print $2}' 2>/dev/null \
          )
        if [[ -n "${packageName}" ]]; then
          # Instead of printing out the full path, print out the name of the package
          # from the package.json and append the current subdirectory
          current_path="`echo $packageName | tr -d '"'`$subdirectory_path"
        else
          current_path=$(truncatePathFromRight "$(pwd | sed -e "s,^$HOME,~,")" )
        fi
      ;;
      truncate_with_folder_marker)
        local last_marked_folder marked_folder
        set_default POWERLEVEL9K_SHORTEN_FOLDER_MARKER ".shorten_folder_marker"

        # Search for the folder marker in the parent directories and
        # buildup a pattern that is removed from the current path
        # later on.
        for marked_folder in $(upsearch $POWERLEVEL9K_SHORTEN_FOLDER_MARKER); do
          if [[ "$marked_folder" == "/" ]]; then
            # If we reached root folder, stop upsearch.
            current_path="/"
          elif [[ "$marked_folder" == "$HOME" ]]; then
            # If we reached home folder, stop upsearch.
            current_path="~"
          elif [[ "${marked_folder%/*}" == $last_marked_folder ]]; then
            current_path="${current_path%/}/${marked_folder##*/}"
          else
            current_path="${current_path%/}/$POWERLEVEL9K_SHORTEN_DELIMITER/${marked_folder##*/}"
          fi
          last_marked_folder=$marked_folder
        done

        # Replace the shortest possible match of the marked folder from
        # the current path.
        current_path=$current_path${PWD#${last_marked_folder}*}
      ;;
      *)
        current_path="$(print -P "%$((POWERLEVEL9K_SHORTEN_DIR_LENGTH+1))(c:$POWERLEVEL9K_SHORTEN_DELIMITER/:)%${POWERLEVEL9K_SHORTEN_DIR_LENGTH}c")"
      ;;
    esac
  fi

  if [[ "${POWERLEVEL9K_DIR_OMIT_FIRST_CHARACTER}" == "true" ]]; then
    current_path="${current_path[2,-1]}"
  fi

  if [[ "${POWERLEVEL9K_DIR_PATH_SEPARATOR}" != "/" ]]; then
    current_path="$( echo "${current_path}" | sed "s/\//${POWERLEVEL9K_DIR_PATH_SEPARATOR}/g")"
  fi

  if [[ "${POWERLEVEL9K_HOME_FOLDER_ABBREVIATION}" != "~" ]]; then
    current_path="$( echo "${current_path}" | sed "s/^~/${POWERLEVEL9K_HOME_FOLDER_ABBREVIATION}/")"
  fi

  typeset -AH dir_states
  dir_states=(
    "DEFAULT"         "FOLDER_ICON"
    "HOME"            "HOME_ICON"
    "HOME_SUBFOLDER"  "HOME_SUB_ICON"
  )
  local current_state="DEFAULT"
  if [[ $(print -P "%~") == '~' ]]; then
    current_state="HOME"
  elif [[ $(print -P "%~") == '~'* ]]; then
    current_state="HOME_SUBFOLDER"
  fi
  "$1_prompt_segment" "$0_${current_state}" "$2" "blue" "$DEFAULT_COLOR" "${current_path}" "${dir_states[$current_state]}"
}

# Docker machine
prompt_docker_machine() {
  local docker_machine="$DOCKER_MACHINE_NAME"

  if [[ -n "$docker_machine" ]]; then
    "$1_prompt_segment" "$0" "$2" "magenta" "$DEFAULT_COLOR" "$docker_machine" 'SERVER_ICON'
  fi
}

# GO prompt
prompt_go_version() {
  local go_version
  local go_path
  go_version=$(go version 2>/dev/null | sed -E "s/.*(go[0-9.]*).*/\1/")
  go_path=$(go env GOPATH 2>/dev/null)

  if [[ -n "$go_version" && "${PWD##$go_path}" != "$PWD" ]]; then
    "$1_prompt_segment" "$0" "$2" "green" "255" "$go_version" "GO_ICON"
  fi
}

# Command number (in local history)
prompt_history() {
  "$1_prompt_segment" "$0" "$2" "244" "$DEFAULT_COLOR" '%h'
}

# Detection for virtualization (systemd based systems only)
prompt_detect_virt() {
  if ! command -v systemd-detect-virt > /dev/null; then
    return
  fi
  local virt=$(systemd-detect-virt)
  if [[ "$virt" == "none" ]]; then
    if [[ "$(ls -di / | grep -o 2)" != "2" ]]; then
      virt="chroot"
      "$1_prompt_segment" "$0" "$2" "yellow" "$DEFAULT_COLOR" "$virt"
    else
      ;
    fi
  else
    "$1_prompt_segment" "$0" "$2" "yellow" "$DEFAULT_COLOR" "$virt"
  fi
}


prompt_icons_test() {
  for key in ${(@k)icons}; do
    # The lower color spectrum in ZSH makes big steps. Choosing
    # the next color has enough contrast to read.
    local random_color=$((RANDOM % 8))
    local next_color=$((random_color+1))
    "$1_prompt_segment" "$0" "$2" "$random_color" "$next_color" "$key" "$key"
  done
}

prompt_ip() {
  if [[ "$OS" == "OSX" ]]; then
    if defined POWERLEVEL9K_IP_INTERFACE; then
      # Get the IP address of the specified interface.
      ip=$(ipconfig getifaddr "$POWERLEVEL9K_IP_INTERFACE")
    else
      local interfaces callback
      # Get network interface names ordered by service precedence.
      interfaces=$(networksetup -listnetworkserviceorder | grep -o "Device:\s*[a-z0-9]*" | grep -o -E '[a-z0-9]*$')
      callback='ipconfig getifaddr $item'

      ip=$(getRelevantItem "$interfaces" "$callback")
    fi
  else
    if defined POWERLEVEL9K_IP_INTERFACE; then
      # Get the IP address of the specified interface.
      ip=$(ip -4 a show "$POWERLEVEL9K_IP_INTERFACE" | grep -o "inet\s*[0-9.]*" | grep -o "[0-9.]*")
    else
      local interfaces callback
      # Get all network interface names that are up
      interfaces=$(ip link ls up | grep -o -E ":\s+[a-z0-9]+:" | grep -v "lo" | grep -o "[a-z0-9]*")
      callback='ip -4 a show $item | grep -o "inet\s*[0-9.]*" | grep -o "[0-9.]*"'

      ip=$(getRelevantItem "$interfaces" "$callback")
    fi
  fi

  "$1_prompt_segment" "$0" "$2" "cyan" "$DEFAULT_COLOR" "$ip" 'NETWORK_ICON'
}

prompt_load() {
  # The load segment can have three different states
  local current_state="unknown"
  local cores

  typeset -AH load_states
  load_states=(
    'critical'      'red'
    'warning'       'yellow'
    'normal'        'green'
  )

  if [[ "$OS" == "OSX" ]] || [[ "$OS" == "BSD" ]]; then
    load_avg_1min=$(sysctl vm.loadavg | grep -o -E '[0-9]+(\.|,)[0-9]+' | head -n 1)
    if [[ "$OS" == "OSX" ]]; then
      cores=$(sysctl -n hw.logicalcpu)
    else
      cores=$(sysctl -n hw.ncpu)
    fi
  else
    load_avg_1min=$(grep -o "[0-9.]*" /proc/loadavg | head -n 1)
    cores=$(nproc)
  fi

  # Replace comma
  load_avg_1min=${load_avg_1min//,/.}

  if [[ "$load_avg_1min" -gt $(bc -l <<< "${cores} * 0.7") ]]; then
    current_state="critical"
  elif [[ "$load_avg_1min" -gt $(bc -l <<< "${cores} * 0.5") ]]; then
    current_state="warning"
  else
    current_state="normal"
  fi

  "$1_prompt_segment" "${0}_${current_state}" "$2" "${load_states[$current_state]}" "$DEFAULT_COLOR" "$load_avg_1min" 'LOAD_ICON'
}

# Node version
prompt_node_version() {
  local node_version=$(node -v 2>/dev/null)
  [[ -z "${node_version}" ]] && return

  "$1_prompt_segment" "$0" "$2" "green" "white" "${node_version:1}" 'NODE_ICON'
}

# Node version from NVM
# Only prints the segment if different than the default value
prompt_nvm() {
  [[ ! $(type nvm) =~ 'nvm is a shell function'* ]] && return
  local node_version=$(nvm current)
  [[ -z "${node_version}" ]] || [[ ${node_version} = "none" ]] && return
  local nvm_default=$(cat $NVM_DIR/alias/default)
  [[ "$node_version" =~ "$nvm_default" ]] && return

  $1_prompt_segment "$0" "$2" "green" "011" "${node_version:1}" 'NODE_ICON'
}

# NodeEnv Prompt
prompt_nodeenv() {
  local nodeenv_path="$NODE_VIRTUAL_ENV"
  if [[ -n "$nodeenv_path" && "$NODE_VIRTUAL_ENV_DISABLE_PROMPT" != true ]]; then
    local info="$(node -v)[$(basename "$nodeenv_path")]"
    "$1_prompt_segment" "$0" "$2" "black" "green" "$info" 'NODE_ICON'
  fi
}

# print a little OS icon
prompt_os_icon() {
  "$1_prompt_segment" "$0" "$2" "black" "255" "$OS_ICON"
}

# print PHP version number
prompt_php_version() {
  local php_version
  php_version=$(php -v 2>&1 | grep -oe "^PHP\s*[0-9.]*")

  if [[ -n "$php_version" ]]; then
    "$1_prompt_segment" "$0" "$2" "013" "255" "$php_version"
  fi
}

# Show free RAM and used Swap
prompt_ram() {
  local base=''
  local ramfree=0
  if [[ "$OS" == "OSX" ]]; then
    # Available = Free + Inactive
    # See https://support.apple.com/en-us/HT201538
    ramfree=$(vm_stat | grep "Pages free" | grep -o -E '[0-9]+')
    ramfree=$((ramfree + $(vm_stat | grep "Pages inactive" | grep -o -E '[0-9]+')))
    # Convert pages into Bytes
    ramfree=$(( ramfree * 4096 ))
  else
    if [[ "$OS" == "BSD" ]]; then
      ramfree=$(grep 'avail memory' /var/run/dmesg.boot | awk '{print $4}')
    else
      ramfree=$(grep -o -E "MemAvailable:\s+[0-9]+" /proc/meminfo | grep -o "[0-9]*")
      base='K'
    fi
  fi

  "$1_prompt_segment" "$0" "$2" "yellow" "$DEFAULT_COLOR" "$(printSizeHumanReadable "$ramfree" $base)" 'RAM_ICON'
}

# rbenv information
prompt_rbenv() {
  if which rbenv 2>/dev/null >&2; then
    local rbenv_version_name="$(rbenv version-name)"
    local rbenv_global="$(rbenv global)"

    # Don't show anything if the current Ruby is the same as the global Ruby.
    if [[ $rbenv_version_name == $rbenv_global ]]; then
      return
    fi

    "$1_prompt_segment" "$0" "$2" "red" "$DEFAULT_COLOR" "$rbenv_version_name" 'RUBY_ICON'
  fi
}

# chruby information
# see https://github.com/postmodern/chruby/issues/245 for chruby_auto issue with ZSH
prompt_chruby() {
  # Uses $RUBY_VERSION and $RUBY_ENGINE set by chruby
  set_default POWERLEVEL9K_CHRUBY_SHOW_VERSION true
  set_default POWERLEVEL9K_CHRUBY_SHOW_ENGINE true
  local chruby_label=""

  if [[ "$POWERLEVEL9K_CHRUBY_SHOW_ENGINE" == true ]]; then
    chruby_label+="$RUBY_ENGINE "
  fi
  if [[ "$POWERLEVEL9K_CHRUBY_SHOW_VERSION" == true ]]; then
    chruby_label+="$RUBY_VERSION"
  fi

  # Truncate trailing spaces
  chruby_label="${chruby_label%"${chruby_label##*[![:space:]]}"}"

  # Don't show anything if the chruby did not change the default ruby
  if [[ "$RUBY_ENGINE" != "" ]]; then
    "$1_prompt_segment" "$0" "$2" "red" "$DEFAULT_COLOR" "${chruby_label}" 'RUBY_ICON'
  fi
}

# Print an icon if user is root.
prompt_root_indicator() {
  if [[ "$UID" -eq 0 ]]; then
    "$1_prompt_segment" "$0" "$2" "$DEFAULT_COLOR" "yellow" "" 'ROOT_ICON'
  fi
}

# Print Rust version number
prompt_rust_version() {
  local rust_version
  rust_version=$(rustc --version 2>&1 | grep -oe "^rustc\s*[^ ]*" | grep -o '[0-9.a-z\\\-]*$')

  if [[ -n "$rust_version" ]]; then
    "$1_prompt_segment" "$0" "$2" "208" "$DEFAULT_COLOR" "Rust $rust_version" 'RUST_ICON'
  fi
}
# RSpec test ratio
prompt_rspec_stats() {
  if [[ (-d app && -d spec) ]]; then
    local code_amount tests_amount
    code_amount=$(ls -1 app/**/*.rb | wc -l)
    tests_amount=$(ls -1 spec/**/*.rb | wc -l)

    build_test_stats "$1" "$0" "$2" "$code_amount" "$tests_amount" "RSpec" 'TEST_ICON'
  fi
}

# Ruby Version Manager information
prompt_rvm() {
  local gemset=$(echo $GEM_HOME | awk -F'@' '{print $2}')
  [ "$gemset" != "" ] && gemset="@$gemset"

  local version=$(echo $MY_RUBY_HOME | awk -F'-' '{print $2}')

  if [[ -n "$version$gemset" ]]; then
    "$1_prompt_segment" "$0" "$2" "240" "$DEFAULT_COLOR" "$version$gemset" 'RUBY_ICON'
  fi
}

prompt_ssh() {
  if [[ -n "$SSH_CLIENT" ]] || [[ -n "$SSH_TTY" ]]; then
    "$1_prompt_segment" "$0" "$2" "$DEFAULT_COLOR" "yellow" "" 'SSH_ICON'
  fi
}

# Status: return code if verbose, otherwise just an icon if an error occurred
set_default POWERLEVEL9K_STATUS_VERBOSE true
set_default POWERLEVEL9K_STATUS_OK_IN_NON_VERBOSE false
prompt_status() {
  if [[ "$RETVAL" -ne 0 ]]; then
    if [[ "$POWERLEVEL9K_STATUS_VERBOSE" == true ]]; then
      "$1_prompt_segment" "$0_ERROR" "$2" "red" "226" "$RETVAL" 'CARRIAGE_RETURN_ICON'
    else
      "$1_prompt_segment" "$0_ERROR" "$2" "$DEFAULT_COLOR" "red" "" 'FAIL_ICON'
    fi
  elif [[ "$POWERLEVEL9K_STATUS_VERBOSE" == true || "$POWERLEVEL9K_STATUS_OK_IN_NON_VERBOSE" == true ]]; then
    "$1_prompt_segment" "$0_OK" "$2" "$DEFAULT_COLOR" "green" "" 'OK_ICON'
  fi
}

prompt_swap() {
  local swap_used=0
  local base=''

  if [[ "$OS" == "OSX" ]]; then
    local raw_swap_used
    raw_swap_used=$(sysctl vm.swapusage | grep -o "used\s*=\s*[0-9,.A-Z]*" | grep -o "[0-9,.A-Z]*$")

    typeset -F 2 swap_used
    swap_used=${$(echo $raw_swap_used | grep -o "[0-9,.]*")//,/.}
    # Replace comma
    swap_used=${swap_used//,/.}

    base=$(echo "$raw_swap_used" | grep -o "[A-Z]*$")
  else
    swap_total=$(grep -o -E "SwapTotal:\s+[0-9]+" /proc/meminfo | grep -o "[0-9]*")
    swap_free=$(grep -o -E "SwapFree:\s+[0-9]+" /proc/meminfo | grep -o "[0-9]*")
    swap_used=$(( swap_total - swap_free ))
    base='K'
  fi

  "$1_prompt_segment" "$0" "$2" "yellow" "$DEFAULT_COLOR" "$(printSizeHumanReadable "$swap_used" $base)" 'SWAP_ICON'
}

# Symfony2-PHPUnit test ratio
prompt_symfony2_tests() {
  if [[ (-d src && -d app && -f app/AppKernel.php) ]]; then
    local code_amount tests_amount
    code_amount=$(ls -1 src/**/*.php | grep -vc Tests)
    tests_amount=$(ls -1 src/**/*.php | grep -c Tests)

    build_test_stats "$1" "$0" "$2" "$code_amount" "$tests_amount" "SF2" 'TEST_ICON'
  fi
}

# Symfony2-Version
prompt_symfony2_version() {
  if [[ -f app/bootstrap.php.cache ]]; then
    local symfony2_version
    symfony2_version=$(grep " VERSION " app/bootstrap.php.cache | sed -e 's/[^.0-9]*//g')
    "$1_prompt_segment" "$0" "$2" "240" "$DEFAULT_COLOR" "$symfony2_version" 'SYMFONY_ICON'
  fi
}

# Show a ratio of tests vs code
build_test_stats() {
  local code_amount="$4"
  local tests_amount="$5"+0.00001
  local headline="$6"

  # Set float precision to 2 digits:
  typeset -F 2 ratio
  local ratio=$(( (tests_amount/code_amount) * 100 ))

  (( ratio >= 75 )) && "$1_prompt_segment" "${2}_GOOD" "$3" "cyan" "$DEFAULT_COLOR" "$headline: $ratio%%" "$6"
  (( ratio >= 50 && ratio < 75 )) && "$1_prompt_segment" "$2_AVG" "$3" "yellow" "$DEFAULT_COLOR" "$headline: $ratio%%" "$6"
  (( ratio < 50 )) && "$1_prompt_segment" "$2_BAD" "$3" "red" "$DEFAULT_COLOR" "$headline: $ratio%%" "$6"
}

# System time
prompt_time() {
  local time_format="%D{%H:%M:%S}"
  if [[ -n "$POWERLEVEL9K_TIME_FORMAT" ]]; then
    time_format="$POWERLEVEL9K_TIME_FORMAT"
  fi

  "$1_prompt_segment" "$0" "$2" "$DEFAULT_COLOR_INVERTED" "$DEFAULT_COLOR" "$time_format"
}

# todo.sh: shows the number of tasks in your todo.sh file
prompt_todo() {
  if $(hash todo.sh 2>&-); then
    count=$(todo.sh ls | egrep "TODO: [0-9]+ of ([0-9]+) tasks shown" | awk '{ print $4 }')
    if [[ "$count" = <-> ]]; then
      "$1_prompt_segment" "$0" "$2" "244" "$DEFAULT_COLOR" "$count" 'TODO_ICON'
    fi
  fi
}

# VCS segment: shows the state of your repository, if you are in a folder under
# version control
set_default POWERLEVEL9K_VCS_ACTIONFORMAT_FOREGROUND "red"
# Default: Just display the first 8 characters of our changeset-ID.
set_default POWERLEVEL9K_VCS_INTERNAL_HASH_LENGTH "8"
powerlevel9k_vcs_init() {
  if [[ -n "$POWERLEVEL9K_CHANGESET_HASH_LENGTH" ]]; then
    POWERLEVEL9K_VCS_INTERNAL_HASH_LENGTH="$POWERLEVEL9K_CHANGESET_HASH_LENGTH"
  fi

  # Load VCS_INFO
  autoload -Uz vcs_info

  VCS_WORKDIR_DIRTY=false
  VCS_WORKDIR_HALF_DIRTY=false

  # The vcs segment can have three different states - defaults to 'clean'.
  typeset -gAH vcs_states
  vcs_states=(
    'clean'         'green'
    'modified'      'yellow'
    'untracked'     'green'
  )

  VCS_CHANGESET_PREFIX=''
  if [[ "$POWERLEVEL9K_SHOW_CHANGESET" == true ]]; then
    VCS_CHANGESET_PREFIX="$(print_icon 'VCS_COMMIT_ICON')%0.$POWERLEVEL9K_VCS_INTERNAL_HASH_LENGTH""i "
  fi

  zstyle ':vcs_info:*' enable git hg svn
  zstyle ':vcs_info:*' check-for-changes true

  VCS_DEFAULT_FORMAT="$VCS_CHANGESET_PREFIX%b%c%u%m"
  zstyle ':vcs_info:*' formats "$VCS_DEFAULT_FORMAT"

  zstyle ':vcs_info:*' actionformats "%b %F{${POWERLEVEL9K_VCS_ACTIONFORMAT_FOREGROUND}}| %a%f"

  zstyle ':vcs_info:*' stagedstr " $(print_icon 'VCS_STAGED_ICON')"
  zstyle ':vcs_info:*' unstagedstr " $(print_icon 'VCS_UNSTAGED_ICON')"

  defined POWERLEVEL9K_VCS_GIT_HOOKS || POWERLEVEL9K_VCS_GIT_HOOKS=(vcs-detect-changes git-untracked git-aheadbehind git-stash git-remotebranch git-tagname)
  zstyle ':vcs_info:git*+set-message:*' hooks $POWERLEVEL9K_VCS_GIT_HOOKS
  defined POWERLEVEL9K_VCS_HG_HOOKS || POWERLEVEL9K_VCS_HG_HOOKS=(vcs-detect-changes)
  zstyle ':vcs_info:hg*+set-message:*' hooks $POWERLEVEL9K_VCS_HG_HOOKS
  defined POWERLEVEL9K_VCS_SVN_HOOKS || POWERLEVEL9K_VCS_SVN_HOOKS=(vcs-detect-changes svn-detect-changes)
  zstyle ':vcs_info:svn*+set-message:*' hooks $POWERLEVEL9K_VCS_SVN_HOOKS

  # For Hg, only show the branch name
  zstyle ':vcs_info:hg*:*' branchformat "$(print_icon 'VCS_BRANCH_ICON')%b"
  # The `get-revision` function must be turned on for dirty-check to work for Hg
  zstyle ':vcs_info:hg*:*' get-revision true
  zstyle ':vcs_info:hg*:*' get-bookmarks true
  zstyle ':vcs_info:hg*+gen-hg-bookmark-string:*' hooks hg-bookmarks

  # For svn, only
  # TODO fix the %b (branch) format for svn. Using %b breaks
  # color-encoding of the foreground for the rest of the powerline.
  zstyle ':vcs_info:svn*:*' formats "$VCS_CHANGESET_PREFIX%c%u"
  zstyle ':vcs_info:svn*:*' actionformats "$VCS_CHANGESET_PREFIX%c%u %F{${POWERLEVEL9K_VCS_ACTIONFORMAT_FOREGROUND}}| %a%f"

  if [[ "$POWERLEVEL9K_SHOW_CHANGESET" == true ]]; then
    zstyle ':vcs_info:*' get-revision true
  fi
}

prompt_vcs() {
  VCS_WORKDIR_DIRTY=false
  VCS_WORKDIR_HALF_DIRTY=false
  current_state=""

  # Actually invoke vcs_info manually to gather all information.
  vcs_info
  local vcs_prompt="${vcs_info_msg_0_}"

  if [[ -n "$vcs_prompt" ]]; then
    if [[ "$VCS_WORKDIR_DIRTY" == true ]]; then
      # $vcs_visual_identifier gets set in +vi-vcs-detect-changes in functions/vcs.zsh,
      # as we have there access to vcs_info internal hooks.
      current_state='modified'
    else
      if [[ "$VCS_WORKDIR_HALF_DIRTY" == true ]]; then
        current_state='untracked'
      else
        current_state='clean'
      fi
    fi
    "$1_prompt_segment" "${0}_${(U)current_state}" "$2" "${vcs_states[$current_state]}" "$DEFAULT_COLOR" "$vcs_prompt" "$vcs_visual_identifier"
  fi
}

# Vi Mode: show editing mode (NORMAL|INSERT)
set_default POWERLEVEL9K_VI_INSERT_MODE_STRING "INSERT"
set_default POWERLEVEL9K_VI_COMMAND_MODE_STRING "NORMAL"
prompt_vi_mode() {
  case ${KEYMAP} in
    main|viins)
      "$1_prompt_segment" "$0_INSERT" "$2" "$DEFAULT_COLOR" "blue" "$POWERLEVEL9K_VI_INSERT_MODE_STRING"
    ;;
    vicmd)
      "$1_prompt_segment" "$0_NORMAL" "$2" "$DEFAULT_COLOR" "default" "$POWERLEVEL9K_VI_COMMAND_MODE_STRING"
    ;;
  esac
}

# Virtualenv: current working virtualenv
# More information on virtualenv (Python):
# https://virtualenv.pypa.io/en/latest/
prompt_virtualenv() {
  local virtualenv_path="$VIRTUAL_ENV"
  if [[ -n "$virtualenv_path" && "$VIRTUAL_ENV_DISABLE_PROMPT" != true ]]; then
    "$1_prompt_segment" "$0" "$2" "blue" "$DEFAULT_COLOR" "$(basename "$virtualenv_path")" 'PYTHON_ICON'
  fi
}

# pyenv: current active python version (with restrictions)
# More information on pyenv (Python version manager like rbenv and rvm):
# https://github.com/yyuu/pyenv
# the prompt parses output of pyenv version and only displays the first word
prompt_pyenv() {
  local pyenv_version="$(pyenv version 2>/dev/null)"
  pyenv_version="${pyenv_version%% *}"
  # XXX: The following should return the same as above.
  # This reads better for devs familiar with sed/awk/grep/cut utilities
  # Using shell expansion/substitution may hamper future maintainability
  #local pyenv_version="$(pyenv version 2>/dev/null | head -n1 | cut -d' ' -f1)"
  if [[ -n "$pyenv_version" && "$pyenv_version" != "system" ]]; then
    "$1_prompt_segment" "$0" "$2" "blue" "$DEFAULT_COLOR" "$pyenv_version" 'PYTHON_ICON'
  fi
}

# Swift version
prompt_swift_version() {
  # Get the first number as this is probably the "main" version number..
  local swift_version=$(swift --version 2>/dev/null | grep -o -E "[0-9.]+" | head -n 1)
  [[ -z "${swift_version}" ]] && return

  "$1_prompt_segment" "$0" "$2" "magenta" "white" "${swift_version}" 'SWIFT_ICON'
}

# dir_writable: Display information about the user's permission to write in the current directory
prompt_dir_writable() {
  if [[ ! -w "$PWD" ]]; then
    "$1_prompt_segment" "$0_FORBIDDEN" "$2" "red" "226" "" 'LOCK_ICON'
  fi
}

################################################################
# Prompt processing and drawing
################################################################
# Main prompt
build_left_prompt() {
  local index=1
  for element in "${POWERLEVEL9K_LEFT_PROMPT_ELEMENTS[@]}"; do
    # Remove joined information in direct calls
    element=${element%_joined}

    # Check if it is a custom command, otherwise interpet it as
    # a prompt.
    if [[ $element[0,7] =~ "custom_" ]]; then
      "prompt_custom" "left" "$index" $element[8,-1]
    else
      "prompt_$element" "left" "$index"
    fi

    index=$((index + 1))
  done

  left_prompt_end
}

# Right prompt
build_right_prompt() {
  local index=1
  for element in "${POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS[@]}"; do
    # Remove joined information in direct calls
    element=${element%_joined}

    # Check if it is a custom command, otherwise interpet it as
    # a prompt.
    if [[ $element[0,7] =~ "custom_" ]]; then
      "prompt_custom" "right" "$index" $element[8,-1]
    else
      "prompt_$element" "right" "$index"
    fi

    index=$((index + 1))
  done
}

powerlevel9k_preexec() {
  _P9K_TIMER_START=$EPOCHREALTIME
}

set_default POWERLEVEL9K_PROMPT_ADD_NEWLINE false
powerlevel9k_prepare_prompts() {
  RETVAL=$?

  _P9K_COMMAND_DURATION=$((EPOCHREALTIME - _P9K_TIMER_START))

  # Reset start time
  _P9K_TIMER_START=0xFFFFFFFF

  if [[ "$POWERLEVEL9K_PROMPT_ON_NEWLINE" == true ]]; then
    PROMPT='$(print_icon 'MULTILINE_FIRST_PROMPT_PREFIX')%f%b%k$(build_left_prompt)
$(print_icon 'MULTILINE_SECOND_PROMPT_PREFIX')'
    if [[ "$POWERLEVEL9K_RPROMPT_ON_NEWLINE" != true ]]; then
      # The right prompt should be on the same line as the first line of the left
      # prompt. To do so, there is just a quite ugly workaround: Before zsh draws
      # the RPROMPT, we advise it, to go one line up. At the end of RPROMPT, we
      # advise it to go one line down. See:
      # http://superuser.com/questions/357107/zsh-right-justify-in-ps1
      local LC_ALL="" LC_CTYPE="en_US.UTF-8" # Set the right locale to protect special characters
      RPROMPT_PREFIX='%{'$'\e[1A''%}' # one line up
      RPROMPT_SUFFIX='%{'$'\e[1B''%}' # one line down
    else
      RPROMPT_PREFIX=''
      RPROMPT_SUFFIX=''
    fi
  else
    PROMPT='%f%b%k$(build_left_prompt)'
    RPROMPT_PREFIX=''
    RPROMPT_SUFFIX=''
  fi

  if [[ "$POWERLEVEL9K_DISABLE_RPROMPT" != true ]]; then
    RPROMPT='$RPROMPT_PREFIX%f%b%k$(build_right_prompt)%{$reset_color%}$RPROMPT_SUFFIX'
  fi
NEWLINE='
'
  [[ $POWERLEVEL9K_PROMPT_ADD_NEWLINE == true ]] && PROMPT="$NEWLINE$PROMPT"
}

prompt_powerlevel9k_setup() {
  # I decided to use the value below for better supporting 32-bit CPUs, since the previous value "99999999999" was causing issues on my Android phone, which is powered by an armv7l
  # We don't have to change that until 19 January of 2038! :)

  # Disable false display of command execution time
  # Maximum integer on 32-bit CPUs
  _P9K_TIMER_START=2147483647

  # The prompt function will set these prompt_* options after the setup function
  # returns. We need prompt_subst so we can safely run commands in the prompt
  # without them being double expanded and we need prompt_percent to expand the
  # common percent escape sequences.
  prompt_opts=(subst percent cr)

  # Borrowed from promptinit, sets the prompt options in case the theme was
  # not initialized via promptinit.
  setopt noprompt{bang,cr,percent,subst} "prompt${^prompt_opts[@]}"

  # Display a warning if the terminal does not support 256 colors
  local term_colors
  term_colors=$(echotc Co 2>/dev/null)
  if (( ! $? && ${term_colors:-0} < 256 )); then
    print -P "%F{red}WARNING!%f Your terminal appears to support less than 256 colors!"
    print -P "If your terminal supports 256 colors, please export the appropriate environment variable"
    print -P "_before_ loading this theme in your \~\/.zshrc. In most terminal emulators, putting"
    print -P "%F{blue}export TERM=\"xterm-256color\"%f at the top of your \~\/.zshrc is sufficient."
  fi

  # If the terminal `LANG` is set to `C`, this theme will not work at all.
  local term_lang
  term_lang=$(echo $LANG)
  if [[ $term_lang == 'C' ]]; then
      print -P "\t%F{red}WARNING!%f Your terminal's 'LANG' is set to 'C', which breaks this theme!"
      print -P "\t%F{red}WARNING!%f Please set your 'LANG' to a UTF-8 language, like 'en_US.UTF-8'"
      print -P "\t%F{red}WARNING!%f _before_ loading this theme in your \~\.zshrc. Putting"
      print -P "\t%F{red}WARNING!%f %F{blue}export LANG=\"en_US.UTF-8\"%f at the top of your \~\/.zshrc is sufficient."
  fi

  defined POWERLEVEL9K_LEFT_PROMPT_ELEMENTS || POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context dir rbenv vcs)
  defined POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS || POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS=(status root_indicator background_jobs history time)

  # Display a warning if deprecated segments are in use.
  typeset -AH deprecated_segments
  # old => new
  deprecated_segments=(
    'longstatus'      'status'
  )
  print_deprecation_warning deprecated_segments

  # initialize colors
  autoload -U colors && colors

  if segment_in_use "vcs"; then
    powerlevel9k_vcs_init
  fi

  # initialize timing functions
  zmodload zsh/datetime

  # Initialize math functions
  zmodload zsh/mathfunc

  # initialize hooks
  autoload -Uz add-zsh-hook

  # prepare prompts
  add-zsh-hook precmd powerlevel9k_prepare_prompts
  add-zsh-hook preexec powerlevel9k_preexec
}

prompt_powerlevel9k_setup "$@"