#!/usr/bin/env bash

# Merge both global and local charfiles
CHARDIR=~/.cache/charsel

if [[ ! -d $CHARDIR ]]
then
  mkdir $CHARDIR/
elif [[ ! "$(ls -A $CHARDIR)" ]]
then
  cp -rf /usr/share/charsel/- $CHARDIR/
  cp -rf $HOME/.local/share/charsel/- $CHARDIR/
fi

# Check for user inputs
if [[ $1 == "list" \
  || $1 == "-l" \
  || $1 == "--list" ]]
then
  echo "The following charfiles are installed"
  ls $CHARDIR/charfiles
  exit 0
elif [[ $1 == "help" \
  || $1 == "-h" \
  || $1 == "--help" \
  || $# -ne 1 ]]
then
  cat /usr/share/doc/charsel/README.md
  exit 0
fi

# Define charfile path
CHARFILE=$CHARDIR/charfiles/$1

if [[ ! -f $CHARFILE ]]
then
  echo "Please enter a valid charfile. You can list installed charfiles with \`charsel list\`"
  exit 1
fi

# Define length of shortcut
LENGTH=$(cat $CHARFILE \
  | cut -f 1 -d ',' -s \
  | wc -L \
  | cut -b 1)

# Clear screen
clear

# Main program
while :
do
  # Format output
  echo "*---------*---------------*"
  echo "| CHARSEL | " $1
  echo "*---------*---------------*"
  echo ""

  cat $CHARFILE \
    | sed -e '/^[ \t]*#/d' \
    | grep -A 100 - \
    | tail -n +2 \
    | column -t -N input,output --output-separator ' | ' --separator ','

  echo ""
  echo "*-------------------------*"
  echo "| previous shorcode:" $INPUT
  echo "| previous output:  " $OUTPUT
  echo "*-------------------------*"
  
  # User input
  read -p "| input shortcode:   " -N $LENGTH INPUT

  # This can definately be simplifed, but it works fine
  LINENUMBER=$(cut -f 1 -d ',' -s $CHARFILE \
    | grep -wn $INPUT \
    | cut -d : -f 1)

  OUTPUT=$(cut -f 2 -d ',' -s $CHARFILE \
    | head -$LINENUMBER \
    | tail +$LINENUMBER)

  if [[ $(cut -f 1 -d ',' -s $CHARFILE \
    | grep -wnc $INPUT) == "0" ]]
  then
    OUTPUT="" 
  fi

  # Copy output to clipboard
  echo $OUTPUT | xclip -selection clipboard

  # Clear screen
  clear

done