#!/bin/sh

# MIT License
# Copyright (c) 2021 Alessandro Mauri
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

usage() {
	printf 'tmpl [-hf] [-c dir] filename\n'
	printf '\t-h: print this message\n'
	printf '\t-f: force override\n'
	printf '\t-c dir: change template directory location\n'
}

unset DIR
FORCE=false

while getopts 'hfc:' c
do
	case "$c" in
		h) usage; exit 0 ;;
		f) FORCE=true ;;
		c) DIR="$OPTARG" ;;
		*) ;;
	esac
done
shift $((OPTIND - 1))
if ! [ "$1" ]; then
	echo "Not enough arguments"
	usage
	exit 1
fi

# get the right directory
if [ "$DIR" ]; then
	if ! [ -d "$DIR" ]; then
		echo "Cannot find template directory"
		exit 1
	fi
elif ! [ -d "$DIR" ]; then
	DIR="$HOME"/.config/tmpl
	if ! [ -d "$DIR" ]; then
		DIR="$HOME"/.tmpl
		if ! [ -d "$DIR" ]; then
			echo "Cannot find template directory"
			exit 1
		fi
	fi
fi

tmp="$(mktemp)"
find "$DIR" -maxdepth 1 -type f > "$tmp"
iext="${1##*.}"
while IFS= read -r file; do
	fn="${file##*/}"
	ext="${fn##*.}"
	if [ "$fn" = "$1" ] || [ "$ext" = "$iext" ]; then
		if [ $FORCE ]; then
			cp "$file" "$1"
		else
			cp -i "$file" "$1"
		fi
		exit 0
	fi
done < "$tmp"
rm "$tmp"

echo "No template found, touching"
touch "$1"
exit 0