#!/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 ~/.local/share/charsel/- $CHARDIR/
fi

# Check for user inputs
if [[ $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 charfile into table, showing only the shortcuts below the divider in the charfile
  cat $CHARFILE | grep -A 100 - | tail -n +2 | column -t -N input,output --output-separator ' | ' --separator ','

  # Print a separator
  echo ""
  echo "--------------------------"
  echo "enter the input shortcode here:"

  # User input
  read -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)

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

  # Clear screen
  clear

done