#!/usr/bin/env bash

# #<---------------------------->
# # You must include this section when:
# # Distributing, Using and/or Modifying this code.
# # Please read and abide by the terms of the included LICENSE.
# # Copyright 2020, Deepankar Chakroborty, All rights reserved.
# #
# #  Version : 0.1
# #  Author : Deepankar Chakroborty (https://github.com/dchakro)
# #  Report issues: https://github.com/dchakro/alacritty_colors/issues
# #  License: https://github.com/dchakro/alacritty_colors/blob/master/LICENSE
# #<---------------------------->

# Set the directory where this is installed:
BASEDIR="${HOME}/scripts/alacritty_colors"
cd ${BASEDIR}

# Make a list of themes
declare -a arrFiles
cd themes
for file in *.yml; do
	arrFiles=("${arrFiles[@]}" "$file")
done
cd ..

# Looks for configs everywhere Alacritty does by default
# If no config file is found in all the typical locations
# then it defaults to "$CONFIG" for backwards compatibilty
get_config() {
	if [[ -f "$XDG_CONFIG_HOME/alacritty/alacritty.yml" ]]; then
		echo "$XDG_CONFIG_HOME/alacritty/alacritty.yml"
	elif [[ -f "$XDG_CONFIG_HOME/alacritty.yml" ]]; then
		echo "$XDG_CONFIG_HOME/alacritty.yml"
	elif [[ -f "$HOME/.config/alacritty/alacritty.yml" ]]; then
		echo "$HOME/.config/alacritty/alacritty.yml"
	else
		[[ -f "$HOME/.alacritty.yml" ]]
		echo "$HOME/.alacritty.yml"
	fi
}

CONFIG=$(get_config)

RESET() {
	# Copies ./base.yml
	echo ""
	echo "This will overwrite or create $CONFIG with ./base.yml"
	while true; do
		read -p "Restore base config (y/N): " backup_choice1
		case $backup_choice1 in
		[Yy]*)
			cp ./base.yml $CONFIG
			echo "Config reset to base!"
			break
			;;
		[Nn]*)
			echo "Reset aborted."
			break
			;;
		*)
			echo "Please answer with either Y/y or N/n."
			;;
		esac
	done

}

BACKUP() {
	# Backs up "$CONFIG" as ~/.alacritty.bak.yml
	if [ ! -f "$CONFIG" ]; then
		echo 'No config file found!'
		RESET
	fi

	if [ ! -f ~/.alacritty.bak.yml ]; then
		cp $CONFIG ~/.alacritty.bak.yml && echo "Config backup successful!"
	else
		while true; do
			read -p "Backup exists. Overwrite? (y/N): " backup_choice2
			case $backup_choice2 in
			[Yy]*)
				cp "$CONFIG" ~/.alacritty.bak.yml && echo "Backup overwrite successful!"
				break
				;;
			[Nn]*)
				echo "Backup aborted."
				break
				;;
			*)
				echo "Please answer with either Y/y or N/n."
				;;
			esac
		done
	fi
}

RESTORE() {
	if [ -f ~/.alacritty.bak.yml ]; then
		cp -f ~/.alacritty.bak.yml $CONFIG && echo "Config restored!"
	else
		echo "Backup config for alacritty does not exist!!"
		exit 1
	fi
}

LIST_THEMES() {
	echo 'Availabe themes:'
	declare -i counter
	counter=1
	for item in "${arrFiles[@]}"; do
		echo "# ${counter} :${item}"
		counter=($counter+1)
	done
}

APPLY_THEMES() {
	LIST_THEMES
	read -p "Choose (default=1): " inp
	if [ -z "${inp}" ]; then
		inp=1
	fi
	inp=$((inp - 1)) # as array indices start from 0
	echo ""
	echo "Applying the theme: ${arrFiles[inp]}"

	cat ./base.yml ./themes/${arrFiles[inp]} >|"$CONFIG"
	bash ./show_colors.sh

	while true; do
		read -p "Keep changes (Y/n): " choice
		case $choice in
		[Yy]*)
			echo "Theme set to: ${arrFiles[inp]}"
			exit 0
			;;
		[Nn]*)
			RESTORE
			break
			;;
		*)
			echo "Please answer with either Y/y or N/n."
			;;
		esac
	done
}

while true; do
	reset_choice=""
	choice=""
	backup_choice1=""
	backup_choice2=""
	inp=""

	printf ' -- Apply alacritty themes -- 
	1) Apply Themes
	2) Backup configs
	3) Restore from backup
	4) Reset config (no defined color scheme)
	5) Exit
	  
	Enter: '
	read var

	if [ "$var" -eq "1" ]; then
		APPLY_THEMES
	fi
	if [ "$var" -eq "2" ]; then
		BACKUP
		exit 0
	fi
	if [ "$var" -eq "3" ]; then
		RESTORE
		exit 0
	fi
	if [ "$var" -eq "4" ]; then
		RESET
		exit 0
	fi
	if [ "$var" -eq "5" ]; then
		exit 0
	fi
done