#!/usr/bin/env python3

# todo: Show related git history of a file?

from sys import argv, exit
import time, urllib.parse, re
import os.path as path

from article_utils import the_line_after_metadata, parse_metadata
from page_builder import wrap_page
from date_descriptions import MONTHS

import config

if len(argv) <= 1:
    print("No file was supplied")
    exit(-1)

with open(argv[1], "r") as f:
    content = f.readlines()
    i = the_line_after_metadata(content)

metadata = parse_metadata(argv[1])
directory = path.split(path.dirname(path.abspath(argv[1])))[-1]

title = metadata["Title"]
article_head = "\n# " + title + "\n"

brief = metadata.get("Brief")
if not brief is None:
    article_head += f"*{brief}*\n\n"

date = metadata.get("Date")
if not date is None:
    article_head += f"-- Created: *{MONTHS[date.tm_mon]} {date.tm_mday}, {date.tm_year} UTC*\n\n"

last_edit = metadata.get("Last Edit")
if not last_edit is None:
    if date is None or last_edit.tm_mon != date.tm_mon or \
        last_edit.tm_mday != date.tm_mday or last_edit.tm_year != date.tm_year:
            article_head += f"-- Edited: *{MONTHS[last_edit.tm_mon]} {last_edit.tm_mday}, {last_edit.tm_year} UTC*\n\n"

tags = metadata.get("Tags")
if tags:
    tag_links = []
    for tag in tags:
        tag_links.append(f"[{tag}](/tags/{urllib.parse.quote(tag.lower())}.html)")
    article_head += f"""-- Tags: *{", ".join(tag_links)}*\n\n"""

article_head += "---\n\n"

header = f"""HTML header: <meta property="og:title" content="{title} on mjestečko"></meta>
    <meta property="og:type" content="article"></meta>
    <meta property="og:url" content="{config.address}/articles/{urllib.parse.quote(directory)}.html"></meta>
    <meta name="viewport" content="width=device-width, initial-scale=1">
"""
if not brief is None:
    header += f"""<meta property="og:description" content="{brief}"></meta>\n"""

front_image = re.compile(r"!\[.*\]\((.+?)\)", re.DOTALL).search(''.join(content[i:]))
if not front_image is None:
    header += f"""<meta property="og:image" content="{config.address}/{urllib.parse.quote(front_image.group(1))}"></meta>\n"""

print(header + ''.join(content[:i]) + wrap_page(article_head + ''.join(content[i:])))