#!/usr/bin/env bash
# executed by bash(1) for non-login shells.

# ==============================
# BINDINGS
# ==============================

# ==============================
# FZF-EMOJI-WIDGET
# ==============================

# custom emojis selector with fzf, inspired by fzf shell bindings
#    Require bash > v4; I did not copy other shells solutions from fzf shell bindings
# => pip --user install emoji-fzf
# => sudo apt install fzf
if [[ -f "$HOME/.local/bin/emoji-fzf" ]]; then
    fzf-emoji-widget() {
      Help() {
        echo "FZF widget to insert or replace some emojis."
        echo "Use it with bash>4 and 'bind -x'"
        echo "Default: insert emojis in place."
        echo
        echo "Syntax:  [-h] [-i]"
        echo "options:"
        echo "-h      Print this Help."
        echo "-i      Replace the word before cursor, using it as a query"
        echo
        # READLINE(command line string) and READLINE_POINT(cursor position)
        # are generated by bind.
      }
      local OPTIND=0
      while getopts ":hi" option; do
        case $option in
          h)  Help
              return 0 ;;
          i)  local _REPLACE=1
              local _QUERYLINE=${READLINE_LINE:0:READLINE_POINT}
              local _QUERYLINE_POINT=${#_QUERYLINE}
              local _QUERY="${_QUERYLINE/* /}"
              local _QUERYLINE_START=$(( _QUERYLINE_POINT - "${#_QUERY}" )) ;;
          \?) echo "Error: Invalid option: -$OPTARG"
              Help
              return 0 ;;
        esac
      done
      shift $((OPTIND-1))
    
      local selected=$(emoji-fzf preview --prepend | fzf-tmux -p 85% --multi --reverse --no-hscroll --header "Select multiple emojis with Tab and validate with Enter." --query "$_QUERY" | cut -d " " -f 2 | emoji-fzf get | xargs -d "\n")
    
      if [[ $_REPLACE == 1 ]]; then
        READLINE_LINE="${READLINE_LINE:0:$_QUERYLINE_START}$selected${READLINE_LINE:READLINE_POINT}"
        READLINE_POINT=$(( _QUERYLINE_START + "${#selected}" ))
      else
        READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}$selected${READLINE_LINE:READLINE_POINT}"
        READLINE_POINT=$(( READLINE_POINT + "${#selected}" ))
      fi
    }
    
    # ALT-e - Paste emojis from a list into the command line
    bind -m emacs-standard -x '"\ee": fzf-emoji-widget'
    bind -m vi-command -x '"\ee": fzf-emoji-widget'
    bind -m vi-insert -x '"\ee": fzf-emoji-widget'
    
    # ALT-i - Replace the word before cursor with emojis from a list
    bind -m emacs-standard -x '"\ei": fzf-emoji-widget -i'
    bind -m vi-command -x '"\ei": fzf-emoji-widget -i'
    bind -m vi-insert -x '"\ei": fzf-emoji-widget -i'
fi