import os
import sys

from git import Repo
from pyrogram.types import Message
from driver.filters import command
from pyrogram import Client, filters
from os import system, execle, environ
from driver.decorators import sudo_users_only
from git.exc import InvalidGitRepositoryError
from config import UPSTREAM_REPO, BOT_USERNAME


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)
async def update_repo(_, message: Message):
    chat_id = message.chat.id
    msg = await message.reply("🔄 `processing update...`")
    update_avail = updater()
    if update_avail:
        await msg.edit("✅ update finished\n\n• bot restarted, back active again in 1 minutes.")
        system("git pull -f && pip3 install -r requirements.txt")
        execle(sys.executable, sys.executable, "main.py", environ)
        return
    await msg.edit("bot is **up-to-date** with [main](https://github.com/levina-lab/video-stream/tree/main)", disable_web_page_preview=True)