#!/usr/bin/env python
# -*- coding: utf-8 -*-

# 2015 by Sebastian Hugentobler <shugentobler@vanwa.ch>
# To the extent possible under law, the author(s) have dedicated all copyright
# and related and neighboring rights to this software to the public domain
# worldwide. This software is distributed without any warranty.
# See http://creativecommons.org/publicdomain/zero/1.0/ for a description of CC0.

import argparse, json, os, re, shutil

from datetime import datetime
from jinja2 import Environment, FileSystemLoader

def fromunixtime(value):
    return datetime.fromtimestamp(value).strftime('%Y-%m-%d %H:%M:%S')

def url_replacer(value):
    return value.replace('/', '_').replace(' ', '_').replace('?', '').replace('<', '').replace('>', '')

def user_replacer(match):
    return '[url=../../user/' +url_replacer(match.group(2)) + '.html]' + match.group(2) + '[/url]'

def tohtml(value):
    value = value.replace('{{baseurl}}', 'static')
    value = value.replace('\n', '<br />')
    value = re.sub(r'\[url=\/user\/(.*?)\](.*?)\[\/url\]', user_replacer, value)
    value = re.sub(r'\[url=(.*?)\](.*?)\[/url\]', r'<a href="\1">\2</a>', value)
    value = re.sub(r'\[video\](.*?)\[/video\]', r'<a href="\1">\1</a>', value)
    value = re.sub(r'\[color=(.*?)\](.*?)\[/color\]', r'<font color="\1">\2</font>', value)
    value = re.sub(r'\[b\](.*?)\[/b\]', r'<b>\1</b>', value)
    value = re.sub(r'\[i\](.*?)\[/i\]', r'<i>\1</i>', value)
    value = re.sub(r'\[u\](.*?)\[/u\]', r'<u>\1</u>', value)
    value = re.sub(r'\[img\](.*?)\[/img\]', r'<img src="\1">', value)

    for i in range(25): # ugly hack but works good enough
        value = re.sub(r'\[quote=(.+?)\](.+)\[/quote\]', r'<fieldset><legend>\1</legend>\2</fieldset>', value, count=1)

    for i in range(25): # same here, shut up
        value = re.sub(r'\[quote\](.*?)\[/quote\]', r'<fieldset>\1</fieldset>', value)

    return value

def write_render(rendered, name, outpath):
    if not os.path.exists(os.path.join(outpath, 'board', 'thread')):
        os.makedirs(os.path.join(outpath, 'board', 'thread'))

    if not os.path.exists(os.path.join(outpath, 'user')):
        os.makedirs(os.path.join(outpath, 'user'))

    with open(os.path.join(outpath, name), 'w') as f:
        f.write(rendered)

def find_unregistered_users(data):
    unregistered_users = []
    for board in data['boards']:
        for thread in board['threads']:
            for post in thread['posts']:
                if post['user']['name'] not in unregistered_users:
                    found = False
                    for user in data['users']:
                        if post['user']['name'] == user['name']:
                            found = True
                            break

                    if not found:
                        unregistered_users.append(post['user']['name'])

    return unregistered_users

def render_boards(boards, template_board, template_thread, outpath, title):
    for board in boards:
        rendered_board = template_board.render(board=board, title=title + ' - ' + board['title'])
        write_render(rendered_board, os.path.join('board', url_replacer(board['title']) + '.html'), outpath)

        for thread in board['threads']:
            rendered_thread = template_thread.render(thread=thread, title=title + ' - ' + thread['title'])
            write_render(rendered_thread, os.path.join('board', 'thread', url_replacer(thread['title']) + '.html'), outpath)

        render_boards(board['boards'], template_board, template_thread, outpath, title)

def render(inputfile, staticpath, outpath, title):
    with open(inputfile) as data_file:
        data = json.load(data_file)

        unregistered_users = find_unregistered_users(data)
        for unregistered_user in unregistered_users:
            data['users'].append({ 'name': unregistered_user, 'registered': None })

        env = Environment(loader=FileSystemLoader('./templates'))
        env.filters['fromunixtime'] = fromunixtime
        env.filters['tohtml'] = tohtml
        env.filters['url_replacer'] = url_replacer

        template_users = env.get_template('users.html.j2')
        template_user = env.get_template('user.html.j2')
        template_boards = env.get_template('boards.html.j2')
        template_board = env.get_template('board.html.j2')
        template_thread = env.get_template('thread.html.j2')

        rendered_users = template_users.render(users=data['users'], title=title + ' - Users')
        rendered_boards = template_boards.render(boards=data['boards'], title=title + ' - Boards')

        write_render(rendered_users, 'users.html', outpath)
        write_render(rendered_boards, 'boards.html', outpath)

        shutil.rmtree(os.path.join(outpath, 'board', 'thread', 'static'), ignore_errors=True)
        shutil.copytree(staticpath, os.path.join(outpath, 'board', 'thread', 'static'))

        for user in data['users']:
            rendered_user = template_user.render(user=user, title=title + ' - ' + user['name'])
            write_render(rendered_user, os.path.join('user', url_replacer(user['name']) + '.html'), outpath)

        render_boards(data['boards'], template_board, template_thread, outpath, title)

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description='build a static website out of a proboard json dump')
    parser.add_argument('--data', default='board.json', help='board data (json file)')
    parser.add_argument('--static', default='static', help='path to the static files (images, attachments)')
    parser.add_argument('--out', default='rendered', help='path where the website gets rendered to')
    parser.add_argument('--title', default='Proboard', help='title for your pages')

    args = parser.parse_args()

    render(args.data, args.static, args.out, args.title)