#!/usr/bin/env bash
#
# filebot Bash Completion
# =======================
#
# Bash completion support for the `filebot` command,
# generated by [picocli](http://picocli.info/) version 4.0.0-beta-1b.
#
# Installation
# ------------
#
# 1. Source all completion scripts in your .bash_profile
#
#   cd $YOUR_APP_HOME/bin
#   for f in $(find . -name "*_completion"); do line=". $(pwd)/$f"; grep "$line" ~/.bash_profile || echo "$line" >> ~/.bash_profile; done
#
# 2. Open a new bash console, and type `filebot [TAB][TAB]`
#
# 1a. Alternatively, if you have [bash-completion](https://github.com/scop/bash-completion) installed:
#     Place this file in a `bash-completion.d` folder:
#
#   * /etc/bash-completion.d
#   * /usr/local/etc/bash-completion.d
#   * ~/bash-completion.d
#
# Documentation
# -------------
# The script is called by bash whenever [TAB] or [TAB][TAB] is pressed after
# 'filebot (..)'. By reading entered command line parameters,
# it determines possible bash completions and writes them to the COMPREPLY variable.
# Bash then completes the user input if only one entry is listed in the variable or
# shows the options if more than one is listed in COMPREPLY.
#
# References
# ----------
# [1] http://stackoverflow.com/a/12495480/1440785
# [2] http://tiswww.case.edu/php/chet/bash/FAQ
# [3] https://www.gnu.org/software/bash/manual/html_node/The-Shopt-Builtin.html
# [4] http://zsh.sourceforge.net/Doc/Release/Options.html#index-COMPLETE_005fALIASES
# [5] https://stackoverflow.com/questions/17042057/bash-check-element-in-array-for-elements-in-another-array/17042655#17042655
# [6] https://www.gnu.org/software/bash/manual/html_node/Programmable-Completion.html#Programmable-Completion
#

if [ -n "$BASH_VERSION" ]; then
  # Enable programmable completion facilities when using bash (see [3])
  shopt -s progcomp
elif [ -n "$ZSH_VERSION" ]; then
  # Make alias a distinct command for completion purposes when using zsh (see [4])
  setopt COMPLETE_ALIASES
  alias compopt=complete
fi

# ArrContains takes two arguments, both of which are the name of arrays.
# It creates a temporary hash from lArr1 and then checks if all elements of lArr2
# are in the hashtable.
#
# Returns zero (no error) if all elements of the 2nd array are in the 1st array,
# otherwise returns 1 (error).
#
# Modified from [5]
function ArrContains() {
  local lArr1 lArr2
  declare -A tmp
  eval lArr1=("\"\${$1[@]}\"")
  eval lArr2=("\"\${$2[@]}\"")
  for i in "${lArr1[@]}";{ [ -n "$i" ] && ((++tmp[$i]));}
  for i in "${lArr2[@]}";{ [ -n "$i" ] && [ -z "${tmp[$i]}" ] && return 1;}
  return 0
}

# Bash completion entry point function.
# _complete_filebot finds which commands and subcommands have been specified
# on the command line and delegates to the appropriate function
# to generate possible options and subcommands for the last specified subcommand.
function _complete_filebot() {


  # No subcommands were specified; generate completions for the top-level command.
  _picocli_filebot; return $?;
}

# Generates completions for the options and subcommands of the `filebot` command.
function _picocli_filebot() {
  # Get completion data
  CURR_WORD=${COMP_WORDS[COMP_CWORD]}
  PREV_WORD=${COMP_WORDS[COMP_CWORD-1]}

  COMMANDS=""
  FLAG_OPTS="-rename -non-strict -get-subtitles -check -list -mediainfo -revert -extract -r -unixfs -no-xattr -no-history -clear-cache -clear-prefs -version -help"
  ARG_OPTS="--mode --db --order --action --conflict --filter --mapper --format --q --lang --output --encoding -script --def --file-filter -exec --log --log-file --license"
  mode_OPTION_ARGS="interactive" # --mode values
  db_OPTION_ARGS="TheTVDB AniDB TheMovieDB::TV TVmaze TheMovieDB OMDb AcoustID ID3 exif xattr file" # --db values
  order_OPTION_ARGS="Airdate DVD Absolute AbsoluteAirdate" # --order values
  action_OPTION_ARGS="move copy keeplink symlink hardlink clone duplicate test" # --action values
  conflict_OPTION_ARGS="skip override fail auto index" # --conflict values
  lang_OPTION_ARGS="Albanian Arabic Armenian Bulgarian Catalan Croatian Czech Danish Dutch English Finnish French Canadian French German Greek Hebrew Hindi Hungarian Icelandic Indonesian Italian Japanese Romanized Japanese Korean Latvian Lithuanian Macedonian Malay Chinese Taiwanese Chinese Cantonese Norwegian Persian Polish Portuguese Brazilian Portuguese Romanian Russian Serbian Slovak Slovenian Spanish Mexican Spanish Swedish Thai Turkish Ukrainian Vietnamese" # --lang values
  encoding_OPTION_ARGS="UTF-8 Windows-1252 ISO-8859-1" # --encoding values
  log_OPTION_ARGS="OFF SEVERE WARNING INFO CONFIG FINE FINER FINEST ALL" # --log values

  compopt +o default

  case ${PREV_WORD} in
    --mode)
      COMPREPLY=( $( compgen -W "${mode_OPTION_ARGS}" -- ${CURR_WORD} ) )
      return $?
      ;;
    --db)
      COMPREPLY=( $( compgen -W "${db_OPTION_ARGS}" -- ${CURR_WORD} ) )
      return $?
      ;;
    --order)
      COMPREPLY=( $( compgen -W "${order_OPTION_ARGS}" -- ${CURR_WORD} ) )
      return $?
      ;;
    --action)
      COMPREPLY=( $( compgen -W "${action_OPTION_ARGS}" -- ${CURR_WORD} ) )
      return $?
      ;;
    --conflict)
      COMPREPLY=( $( compgen -W "${conflict_OPTION_ARGS}" -- ${CURR_WORD} ) )
      return $?
      ;;
    --filter)
      compopt -o filenames
      COMPREPLY=( $( compgen -f -- ${CURR_WORD} ) ) # files
      return $?
      ;;
    --mapper)
      compopt -o filenames
      COMPREPLY=( $( compgen -f -- ${CURR_WORD} ) ) # files
      return $?
      ;;
    --format)
      compopt -o filenames
      COMPREPLY=( $( compgen -f -- ${CURR_WORD} ) ) # files
      return $?
      ;;
    --q)
      return
      ;;
    --lang)
      COMPREPLY=( $( compgen -W "${lang_OPTION_ARGS}" -- ${CURR_WORD} ) )
      return $?
      ;;
    --output)
      compopt -o filenames
      COMPREPLY=( $( compgen -f -- ${CURR_WORD} ) ) # files
      return $?
      ;;
    --encoding)
      COMPREPLY=( $( compgen -W "${encoding_OPTION_ARGS}" -- ${CURR_WORD} ) )
      return $?
      ;;
    -script)
      compopt -o filenames
      COMPREPLY=( $( compgen -f -- ${CURR_WORD} ) ) # files
      return $?
      ;;
    --def)
      return
      ;;
    --file-filter)
      compopt -o filenames
      COMPREPLY=( $( compgen -f -- ${CURR_WORD} ) ) # files
      return $?
      ;;
    -exec)
      return
      ;;
    --log)
      COMPREPLY=( $( compgen -W "${log_OPTION_ARGS}" -- ${CURR_WORD} ) )
      return $?
      ;;
    --log-file)
      compopt -o filenames
      COMPREPLY=( $( compgen -f -- ${CURR_WORD} ) ) # files
      return $?
      ;;
    --license)
      compopt -o filenames
      COMPREPLY=( $( compgen -f -- ${CURR_WORD} ) ) # files
      return $?
      ;;
  esac

  if [[ "${CURR_WORD}" == -* ]]; then
    COMPREPLY=( $(compgen -W "${FLAG_OPTS} ${ARG_OPTS}" -- ${CURR_WORD}) )
  else
    COMPREPLY=( $(compgen -W "${COMMANDS}" -- ${CURR_WORD}) )
  fi
}

# Define a completion specification (a compspec) for the
# `filebot`, `filebot.sh`, and `filebot.bash` commands.
# Uses the bash `complete` builtin (see [6]) to specify that shell function
# `_complete_filebot` is responsible for generating possible completions for the
# current word on the command line.
# The `-o default` option means that if the function generated no matches, the
# default Bash completions and the Readline default filename completions are performed.
complete -F _complete_filebot -o default filebot filebot.sh filebot.bash