#!/bin/bash

#To use:
#source simona-zshrc  #inside .zshrc
#I think are required powerline specific fonts

# -------------------------------------------------------------------------------------------
# Tema agnoster modificato derivazione powerline oh-my-zsh/themes/agnoster-simona-zsh-theme
# -------------------------------------------------------------------------------------------

CURRENT_BG='NONE' #ok avvio sequenza gestione cambio colori
#CURRENT_BG='white' #angolino bianco all'inzio
#CURRENT_BG='black' #come none

#CURRENT_FG='black' #ok ma non più usato
#CURRENT_FG='white' #commentato fin dall'inizio

# Special Powerline characters

() {
  local LC_ALL="" LC_CTYPE="en_US.UTF-8"
  # NOTE: This segment separator character is correct.  In 2012, Powerline changed
  # the code points they use for their special characters. This is the new code point.
  # If this is not working for you, you probably have an old version of the
  # Powerline-patched fonts installed. Download and install the new version.
  # Do not submit PRs to change this unless you have reviewed the Powerline code point
  # history and have new information.
  # This is defined using a Unicode escape sequence so it is unambiguously readable, regardless of
  # what font the user is viewing this source code in. Do not replace the
  # escape sequence with a single literal character.
  # Do not change this! Do not make it '\u2b80'; that is the old, wrong code point.

  # 
  SEGMENT_SEPARATOR=$'\ue0b0'
  #SEGMENT_SEPARATOR=''
  #SEGMENT_SEPARATOR='►' #windows
}

# ==============================================================================================================
# TO-DO provare a cambiare ordine e scrivere il '>' dopo la scritta e non prima del sucessivo dato
# ==============================================================================================================

# Begin a segment
# Takes two arguments, background and foreground. Both can be omitted,
# rendering default background/foreground.
prompt_segment() {
  #legge colore di sfondo $1 e testo $2 per il testo da scrivere $3
  local bg fg
  [[ -n $1 ]] && bg="%K{$1}" || bg="%k" #carica colore sfondo da $n o predefinito (background)
  [[ -n $2 ]] && fg="%F{$2}" || fg="%f" #carica colore caratteri da $n o predefinito (foreground)

  # scrive separatore iniziale '>' #echo '\ue0b0' se cambia colore di sfondo
  if [[ $CURRENT_BG != 'NONE' && $1 != $CURRENT_BG ]]; then
    echo -n " %{$bg%F{$CURRENT_BG}%}$SEGMENT_SEPARATOR%{$fg%} " #scrive separatore usando precedente colore di sfondo
  else
    echo -n "%{$bg%}%{$fg%} " #imposta colore (senza prima mettere separatore)
  fi
  CURRENT_BG=$1 #poiché la chiusura > verrà fatta all'inizio della riga successiva questo riporta il colore da usare

  # scrive testo
  [[ -n $3 ]] && echo -n $3 #scrive stringa dati e termina
}

# End the prompt, closing any open segments
prompt_end() {
  # scrive sepratore finale '>' #echo '\ue0b0'
  if [[ -n $CURRENT_BG ]]; then
    echo -n " %{%k%F{$CURRENT_BG}%}$SEGMENT_SEPARATOR"
  else
    echo -n "%{%k%}"
  fi
  echo -n "%{%f%}"
  CURRENT_BG='' #chiude storico colore prossima '>'
}

### Prompt components
# Each component will draw itself, and hide itself if no information needs to be shown

# Status:
# - was there an error
# - am I root
# - are there background jobs?
prompt_status() {

  #crea lista simboli
  local symbols
  symbols=()
  [[ $RETVAL -ne 0 ]] && symbols+="%{%F{red}%}✘"
  [[ $UID -eq 0 ]] && symbols+="%{%F{yellow}%}⚡" #power user (root)
  [[ $(jobs -l | wc -l) -gt 0 ]] && symbols+="%{%F{cyan}%}⚙"

  #[[ $RETVAL -ne 0 ]] && symbols+="%{%F{red}%}$CROSS"
  #[[ $UID -eq 0 ]] && symbols+="%{%F{yellow}%}$LIGHTNING"
  #[[ $(jobs -l | wc -l) -gt 0 ]] && symbols+="%{%F{cyan}%}$GEAR"
  #echo -e "\ue0a0\ue0a1\ue0a2\ue0b0\ue0b1\ue0b2"
  #       
  #echo "<2b80> ± <2b60> ➦ ✔ ✘ ⚡"
  #<2b80> ± <2b60> ➦ ✔ ✘ ⚡
  #  ✚ ● ⚙
  # Characters
  #SEGMENT_SEPARATOR="\ue0b0"
  #PLUSMINUS="\u00b1"
  #BRANCH="\ue0a0"
  #DETACHED="\u27a6"
  #CROSS="\u2718"
  #LIGHTNING="\u26a1"
  #GEAR="\u2699"
  # ➙ ⬆ ⬇ ✱ ◷
  #'\uE271'
  #'\uF17C' 


  #se lista simboli non vuota scrive qualcosa
  [[ -n "$symbols" ]] && prompt_segment black default "$symbols"
}

#autoload colors
#print -P %F{red}ciao
#echo ${(%):-%F{red}}ciao
#typeset fg_bold
#fg_bold=( [black]=$'\C-[[01;30m' [blue]=$'\C-[[01;34m' [cyan]=$'\C-[[01;36m' [default]=$'\C-[[01;39m' [green]=$'\C-[[01;32m' [grey]=$'\C-[[01;30m' [magenta]=$'\C-[[01;35m' [red]=$'\C-[[01;31m' [white]=$'\C-[[01;37m' [yellow]=$'\C-[[01;33m' )
#typeset fg
#fg=( [black]=$'\C-[[30m' [blue]=$'\C-[[34m' [cyan]=$'\C-[[36m' [default]=$'\C-[[39m' [green]=$'\C-[[32m' [grey]=$'\C-[[30m' [magenta]=$'\C-[[35m' [red]=$'\C-[[31m' [white]=$'\C-[[37m' [yellow]=$'\C-[[33m' )
#echo ${(o)color}
#00 01 02 03 04 05 07 08 22 23 24 25 27 28 30 30 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 39 39 40 40 41 42 43 44 45 46 47 49 bg-black bg-blue bg-cyan bg-default bg-green bg-magenta bg-red bg-white bg-yellow black blink blue bold conceal cyan default faint green magenta no-blink no-conceal none no-reverse normal no-standout no-underline red reverse standout underline white yellow
#less $^fpath/colors(N)
#which colors
#lege contneuto funzioni definire

prompt_shell() {
  prompt_segment black green "zsh"
  #prompt_segment black green "zsh"

  #local st
  #st=()
  #st+="%{%F{red}%}"
  #st+="${(%):-%F{red}%}zsh"
  #st+="%{$fg_no_bold[red]%}zsh"
  #st+="%{$fg_bold[red]%}zsh%{$reset_color%}"
  #st+="%{$fg[green]zsh%{$reset_color%}zsh2"
  #prompt_segment black green "$st"

}

# Context: user@hostname (who am I and where am I)
prompt_context() {
  if [[ "$USER" != "$DEFAULT_USER" || -n "$SSH_CLIENT" ]]; then

    #simona 2018-09-17
    if [[ $UID -eq 0 ]]; then
      prompt_segment red default "%(!.%{%F{white}%}.)$USER@%m"
    else
      prompt_segment magenta yellow "%(!.%{%F{yellow}%}.)$USER@%m"
    fi

    #RED GREEN YELLOW BLUE MAGENTA CYAN BLACK WHITE

    #simona 2018-09-12
    #prompt_segment black default "%(!.%{%F{yellow}%}.)$USER@%m"
    #prompt_segment yellow $CURRENT_FG "%(!.%{%F{yellow}%}.)$USER@%m"
    #prompt_segment green $CURRENT_FG "%(!.%{%F{yellow}%}.)$USER@%m"

    #prompt_segment green black "%(!.%{%F{yellow}%}.)$USER@%m"
    #prompt_segment cyan black "%(!.%{%F{yellow}%}.)$USER@%m"
    #prompt_segment magenta white "%(!.%{%F{yellow}%}.)$USER@%m"
    #prompt_segment magenta yellow "%(!.%{%F{yellow}%}.)$USER@%m"
  fi
}

# Virtualenv: current working virtualenv
prompt_virtualenv() {
  local virtualenv_path="$VIRTUAL_ENV"
  if [[ -n $virtualenv_path && -n $VIRTUAL_ENV_DISABLE_PROMPT ]]; then
    prompt_segment blue black "(`basename $virtualenv_path`)"
  fi
}

#VOLTAGE_DROP=43
#MAX_VOLTAGE=4202
#MIN_VOLTAGE=3600
#function batteryIndicator() {
#  is_charging=$(cat /usr/lib/pocketchip-batt/charging)
#  voltage=$(cat /usr/lib/pocketchip-batt/voltage)
#  voltage_offset=$(bc <<< "$is_charging*$VOLTAGE_DROP")
#  excess_voltage=$(bc <<< "$voltage-$voltage_offset-$MIN_VOLTAGE")
#  max_excess_voltage=$(bc <<< "$MAX_VOLTAGE-$VOLTAGE_DROP-$MIN_VOLTAGE")
#  percentage=$(bc <<< "scale=2; $excess_voltage/($max_excess_voltage/100)")
#  battStatus="-" && [[ "$is_charging" == 1 ]] && battStatus="+"
#  if (( $(bc <<< "$percentage < 20") ))
#  then
#    statusColor=red
#  else
#    statusColor=green
#  fi
#  echo "%B%F{${statusColor}}%}$percentage$battStatus"
#}

# Dir: current working directory
prompt_dir() {
  #simona 2018-09-12
  #prompt_segment blue $CURRENT_FG '%~'
  prompt_segment blue white '%~'
  #prompt_segment blue lightblue '%~'
}


## Main prompt
build_prompt() {
  RETVAL=$?
  prompt_status
  prompt_shell
  prompt_virtualenv
  prompt_context
  prompt_dir
  prompt_end
}

prompt_powerline_simona() {
  PROMPT='%{%f%b%k%}$(build_prompt) '
  RPROMPT='[%F{yellow}%?%f]' #aggiunta mia di prova
}

prompt_powerline_simona