import os
import re
import sys
import asyncio
import subprocess
from asyncio import sleep

from git import Repo
from os import system, execle, environ
from git.exc import InvalidGitRepositoryError

from pyrogram.types import Message
from pyrogram import Client, filters
from config import UPSTREAM_REPO, BOT_USERNAME

from driver.core import bot
from driver.filters import command
from driver.decorators import bot_creator
from driver.database.dbqueue import get_active_chats, remove_active_chat


def gen_chlog(repo, diff):
    upstream_repo_url = Repo().remotes[0].config_reader.get("url").replace(".git", "")
    ac_br = repo.active_branch.name
    ch_log = ""
    tldr_log = ""
    ch = f"<b>updates for <a href={upstream_repo_url}/tree/{ac_br}>[{ac_br}]</a>:</b>"
    ch_tl = f"updates for {ac_br}:"
    d_form = "%d/%m/%y || %H:%M"
    for c in repo.iter_commits(diff):
        ch_log += (
            f"\n\n💬 <b>{c.count()}</b> 🗓 <b>[{c.committed_datetime.strftime(d_form)}]</b>\n<b>"
            f"<a href={upstream_repo_url.rstrip('/')}/commit/{c}>[{c.summary}]</a></b> 👨‍💻 <code>{c.author}</code>"
        )
        tldr_log += f"\n\n💬 {c.count()} 🗓 [{c.committed_datetime.strftime(d_form)}]\n[{c.summary}] 👨‍💻 {c.author}"
    if ch_log:
        return str(ch + ch_log), str(ch_tl + tldr_log)
    return ch_log, tldr_log


def updater():
    try:
        repo = Repo()
    except InvalidGitRepositoryError:
        repo = Repo.init()
        origin = repo.create_remote("upstream", UPSTREAM_REPO)
        origin.fetch()
        repo.create_head("main", origin.refs.main)
        repo.heads.main.set_tracking_branch(origin.refs.main)
        repo.heads.main.checkout(True)
    ac_br = repo.active_branch.name
    if "upstream" in repo.remotes:
        ups_rem = repo.remote("upstream")
    else:
        ups_rem = repo.create_remote("upstream", UPSTREAM_REPO)
    ups_rem.fetch(ac_br)
    changelog, tl_chnglog = gen_chlog(repo, f"HEAD..upstream/{ac_br}")
    return bool(changelog)


@Client.on_message(command(["update", f"update@{BOT_USERNAME}"]) & ~filters.edited)
@bot_creator
async def update_bot(_, message: Message):
    chat_id = message.chat.id
    msg = await message.reply("❖ Checking updates...")
    update_avail = updater()
    if update_avail:
        await msg.edit("✅ Update finished !\n\n• Bot restarting, back active again in 1-2 minutes.")
        system("git pull -f && pip3 install --no-cache-dir -r requirements.txt")
        execle(sys.executable, sys.executable, "main.py", environ)
        return
    await msg.edit(f"❖ bot is **up-to-date** with [main]({UPSTREAM_REPO}/tree/main) ❖", disable_web_page_preview=True)


@Client.on_message(command(["restart", f"restart@{BOT_USERNAME}"]) & ~filters.edited)
@bot_creator
async def restart_bot(_, message: Message):
    served_chats = []
    try:
        chats = await get_active_chats()
        for chat in chats:
            served_chats.append(int(chat["chat_id"]))
    except BaseException as e:
        print(e)
    for x in served_chats:
        try:
            await bot.send_message(
                x,
                f"💡 Bot server has just restarted !\n\n• Sorry for the inconveniences due to bot maintenance.",
            )
            await remove_active_chat(x)
        except BaseException as e:
            print(e)
        msg = await message.reply("❖ Restarting bot...")
        args = [sys.executable, "main.py"]
        await msg.edit("✅ Bot restarted\n\n• now bot is working again.")
        execle(sys.executable, *args, environ)
        return