#!/usr/bin/env python3

import sys as _sys
import os as _os
import argparse as _argparse


def string_coin(
	template,
	arguments
):
	result = template
	for (key, value, ) in arguments.items():
		result = result.replace("{{%s}}" % key, value)
	return result
	

def file_read(path):
	handle = open(path, "r")
	content = handle.read()
	handle.close()
	return content
	

def file_write(path, content):
	handle = open(path, "w")
	handle.write(content)
	handle.close()
	

def main():
	## consts
	conf = {
		"title": "Espe",
		"source_directory": "source"
	}
	
	## args
	argument_parser = _argparse.ArgumentParser()
	argument_parser.add_argument(
		"-t",
		"--target-directory",
		type = str,
		default = "build",
	)
	argument_parser.add_argument(
		"-f",
		"--format",
		type = str,
		action = "append",
		choices = ["markdown", "html", "pdf"],
		default = [],
	)
	args = argument_parser.parse_args()
	
	## vars
	target_directory = _os.path.abspath(args.target_directory)
	formats = (["html"] if (len(args.format) <= 0) else args.format)
	
	## exec
	_os.makedirs(args.target_directory, exist_ok = True)
	for format_ in formats:
		if (format_ == "markdown"):
			target_path = string_coin(
				"{{target_directory}}/espe.md",
				{
					"target_directory": target_directory,
				}
			)
			file_write(
				target_path,
				string_coin(
					"# {{title}}\n\n{{content}}",
					{
						"title": conf["title"],
						"content": file_read(
							string_coin(
								"{{source_directory}}/notizen.md",
								{
									"source_directory": conf["source_directory"],
								}
							)
						),
					}
				)
			)
			_sys.stdout.write("%s\n" % target_path)
		elif (format_ == "html"):
			target_path = string_coin(
				"{{target_directory}}/espe.html",
				{
					"target_directory": target_directory,
				}
			)
			_os.system(
				string_coin(
					"pandoc {{source_directory}}/notizen.md --to=html --title={{title}} --metadata='title:{{title}}' --output={{target_path}}",
					{
						"source_directory": conf["source_directory"],
						"target_path": target_path,
						"title": conf["title"],
					}
				)
			)
			_sys.stdout.write("%s\n" % target_path)
		elif (format_ == "pdf"):
			target_path = string_coin(
				"{{target_directory}}/espe.pdf",
				{
					"target_directory": target_directory,
				}
			)
			_os.system(
				string_coin(
					"pandoc {{source_directory}}/notizen.md --to=pdf --title={{title}} --metadata='title:{{title}}' --output={{target_path}}",
					{
						"source_directory": conf["source_directory"],
						"target_path": target_path,
						"title": conf["title"],
					}
				)
			)
			_sys.stdout.write("%s\n" % target_path)
		else:
			raise ValueError("invalid format: %s" % format_)
	

main()