#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import re
import markdown
from datetime import datetime
from email import utils

def remove_tags(text):
    return re.sub(re.compile('<.*?>'), "", text)

def get_path(path, ext_in, ext_out):
	path = path[len("pages"):]
	if path[-len("index"+ext_in):] == "index"+ext_in:
		return path[:-len("index"+ext_in)]
	return path[:-len(ext_in)] + ext_out

def get_dir(path):
	return "/".join(path.split("/")[1:-1])+"/"

def get_root(path):
	root = ""
	for i in range(len(path.split("/"))-2):
		root += "../"
	return root

licenses = {
	"CC-BY": ["cc-by", "CC BY 4.0", "https://creativecommons.org/licenses/by/4.0/"]
}

def get_badge(license, root):
	if license not in licenses:
		return ""
	data = licenses[license]
	return "<a class=\"badge\" title=\""+data[1]+"\" href=\""+data[2]+"\"><img src=\""+root+"badges/"+data[0]+".png\" alt=\""+data[1]+"\"/></a>"

def read_template(template, meta_in):
	if template[:10] != "meta: yes\n":
		return [template, {"meta": "no"}]
	data = template[:-1].split("\n\n") # Strip trailing newline
	md = markdown.Markdown(extensions = ["meta"])
	md.convert(data[0])
	content = "\n\n".join(data[1:])
	content = content.replace("{", "{{").replace("}", "}}")
	meta = meta_in.copy()
	meta.update(md.Meta)
	return [content, MetaDict(meta)]

def escape_braces(s):
	return s.replace("{","{{").replace("}","}}");

defaults = {
	"base": "https://flewkey.com/",
	"title": "Untitled",
	"author": "flewkey",
	"ext": ".html",
	"head": ""
}

class MetaDict(dict):
	def __missing__(self, key):
		return defaults[key] if key in defaults else ""
	def __getitem__(self, key):
		value = dict.__getitem__(self, key)
		if isinstance(value, list):
			return "\n".join(value)
		else:
			return value

def template(content, path, ext, meta):
	global base
	meta = MetaDict(meta)
	if meta["template"] == None:
		return content.format_map(meta)
	with open("templates/"+meta["template"]+ext, "r", encoding="utf-8") as file:
		t_content = file.read()
	t_info = read_template(t_content, meta)
	if t_info[1]["meta"] != "no" and "template" in t_info[1]:
		t_content = template(t_info[0], path, ext, t_info[1])
	if "root" not in meta:
		meta["root"] = get_root(path)
	if "home" not in meta:
		meta["home"] = "." if meta["root"] == "" else meta["root"]
	if "full_path" not in meta:
		meta["full_path"] = get_path(path, ext, meta["ext"])
	if "full_dir" not in meta:
		meta["full_dir"] = get_dir(path)
	if "badge" not in meta and ext == ".html":
		meta["badge"] = get_badge(meta["license"], meta["root"])
	if "date" not in meta and "timestamp" in meta:
		meta["date"] = datetime.fromtimestamp(int(meta["timestamp"])).isoformat().split("T")[0]
	if "pub_date" not in meta and "timestamp" in meta:
		meta["pub_date"] = utils.format_datetime(datetime.fromtimestamp(int(meta["timestamp"])))
	if "blog_list_limit" in meta:
		import gen_blog
		import os
		files = sorted(os.listdir("posts"), reverse=True)
		meta["blog_list"] = gen_blog.gen_list(files, ext, limit=int(meta["blog_list_limit"]), mini=True)
	if "music_list_limit" in meta:
		import gen_music
		import json
		with open("music.json", "r", encoding="utf-8") as file:
			music = json.loads(file.read())
		meta["music_list"] = gen_music.gen_list(music, ext, limit=int(meta["music_list_limit"]), mini=True)
	if "openring" in t_info[1] and t_info[1]["openring"] == "yes":
		with open("temp/openring.html", "r", encoding="utf-8") as file:
			meta["openring"] = file.read()
	meta["head"] += "\n<link rel=\"canonical\" href=\""+meta["base"]+meta["full_path"]+"\"/>"	
	meta["content"] = content.format_map(meta)
	if "description" not in meta and meta["ext"] == ".html":
		meta["auto_description"] = remove_tags(meta["content"].split("</p>")[0]) # Disgusting!
	if "description" in meta:
		meta["auto_description"] = meta["description"]
	return t_content.format_map(meta)