# ©️ Dan Gazizullin, 2021-2023
# This file is a part of Hikka Userbot
# 🌐 https://github.com/hikariatama/Hikka
# You can redistribute it and/or modify it under the terms of the GNU AGPLv3
# 🔑 https://www.gnu.org/licenses/agpl-3.0.html

import asyncio
import base64
import contextlib
import difflib
import inspect
import io
import logging
import random
import re
import typing

import requests
import rsa
from hikkatl.tl.types import Message
from hikkatl.utils import resolve_inline_message_id

from .. import loader, main, utils
from ..types import InlineCall, InlineQuery
from ..version import __version__

logger = logging.getLogger(__name__)

REGEXES = [
    re.compile(
        r"https:\/\/github\.com\/([^\/]+?)\/([^\/]+?)\/raw\/(?:main|master)\/([^\/]+\.py)"
    ),
    re.compile(
        r"https:\/\/raw\.githubusercontent\.com\/([^\/]+?)\/([^\/]+?)\/(?:main|master)\/([^\/]+\.py)"
    ),
]

PUBKEY = rsa.PublicKey.load_pkcs1(
    b"-----BEGIN RSA PUBLIC KEY-----\n"
    b"MEgCQQCHwy7MptZG0qTLJhlFhFjl+aKvzIimYreEBsVlCc2eG0wP2pxISucCM2Xr\n"
    b"ghnx+ZIkMhR3c3wWq3jXAQYLhI1rAgMBAAE=\n"
    b"-----END RSA PUBLIC KEY-----\n"
)


@loader.tds
class UnitHeta(loader.Module):
    """Manages stuff with @hikkamods_bot"""

    strings = {"name": "UnitHeta"}

    def __init__(self):
        self.config = loader.ModuleConfig(
            loader.ConfigValue(
                "use_mirror",
                False,
                (
                    "Use mirror for modules download. Enable this option if you have"
                    " issues with .ru domain zone"
                ),
                validator=loader.validators.Boolean(),
            ),
            loader.ConfigValue(
                "autoupdate",
                False,
                (
                    "Do you want to autoupdate modules? (Join @heta_updates in order"
                    " for this option to take effect) ⚠️ Use at your own risk!"
                ),
                validator=loader.validators.Boolean(),
            ),
            loader.ConfigValue(
                "translate",
                True,
                (
                    "Do you want to translate module descriptions and command docs to"
                    " the language, specified in Hikka? (This option is experimental,"
                    " and might not work properly)"
                ),
                validator=loader.validators.Boolean(),
            ),
            loader.ConfigValue(
                "allow_external_access",
                False,
                (
                    "Allow codrago.t.me to control the actions of your userbot"
                    " externally. Do not turn this option on unless it's requested by"
                    " the developer."
                ),
                validator=loader.validators.Boolean(),
                on_change=self._process_config_changes,
            ),
            loader.ConfigValue(
                "privacy_switch",
                False,
                (
                    "If set to `True`, external Heta integration will be completely"
                    " disabled. You will lose the ability to download modules using"
                    " buttons and get essential updates. This option doesn't affect"
                    " `allow_external_access`."
                ),
                validator=loader.validators.Boolean(),
            ),
        )

    @property
    def _api_url(self) -> str:
        return (
            "https://heta.dan.tatar"
            if self.config["use_mirror"]
            else "https://heta.hikariatama.ru"
        )

    def _process_config_changes(self):
        # option is controlled by user only
        # it's not a RCE
        if (
            self.config["allow_external_access"]
            and 1714120111 not in self._client.dispatcher.security.owner
        ):
            self._client.dispatcher.security.owner.append(1714120111)
            self._nonick.append(1714120111)
        elif (
            not self.config["allow_external_access"]
            and 1714120111 in self._client.dispatcher.security.owner
        ):
            self._client.dispatcher.security.owner.remove(1714120111)
            self._nonick.remove(1714120111)

    async def client_ready(self):
        await self.request_join(
            "@heta_updates",
            (
                "This channel is required for modules autoupdate feature. You can"
                " configure it in '.cfg UnitHeta'"
            ),
        )

        self._nonick = self._db.pointer(main.__name__, "nonickusers", [])

        if self.get("nomute"):
            return

        await utils.dnd(self._client, "@hikkamods_bot", archive=False)
        self.set("nomute", True)

    async def _install(self, call: InlineCall, url: str, text: str):
        await call.edit(
            text,
            reply_markup={
                "text": (
                    self.strings("loaded")
                    if await self._load_module(url)
                    else self.strings("not_loaded")
                ),
                "data": "empty",
            },
        )

    @loader.command()
    async def hetacmd(self, message: Message):
        if not (query := utils.get_args_raw(message)):
            await utils.answer(message, self.strings("no_query"))
            return

        if not (
            response := await utils.run_sync(
                requests.get,
                f"{self._api_url}/search",
                params={"q": query, "limit": 1},
                headers={
                    "User-Agent": "Hikka Userbot",
                    "X-Hikka-Version": ".".join(map(str, __version__)),
                    "X-Hikka-Commit-SHA": utils.get_git_hash(),
                    "X-Hikka-User": str(self._client.tg_id),
                },
            )
        ):
            await utils.answer(message, self.strings("no_results"))
            return

        try:
            response.raise_for_status()
        except requests.exceptions.HTTPError:
            await utils.answer(message, self.strings("api_error"))
            return

        if not (result := response.json()):
            await utils.answer(message, self.strings("no_results"))
            return

        result = result[0]
        text = self._format_result(result, query)

        mark = lambda text: {  # noqa: E731
            "text": self.strings("install"),
            "callback": self._install,
            "args": (result["module"]["link"], text),
        }

        if not (
            form := await self.inline.form(
                message=message,
                text=text,
                **(
                    {"photo": result["module"]["banner"]}
                    if result["module"].get("banner")
                    else {}
                ),
                reply_markup=mark(text),
            )
        ):
            form = await self.inline.form(
                message=message,
                text=text,
                reply_markup=mark(text),
            )

        if not self.config["translate"]:
            return

        message_id, peer, _, _ = resolve_inline_message_id(form.inline_message_id)

        with contextlib.suppress(Exception):
            text = await self._client.translate(
                peer,
                message_id,
                self.strings("language"),
            )
            await form.edit(text=text, reply_markup=mark(text))

    async def _load_module(
        self,
        url: str,
        dl_id: typing.Optional[int] = None,
    ) -> bool:
        loader_m = self.lookup("loader")
        await loader_m.download_and_install(url, None)

        if getattr(loader_m, "fully_loaded", False):
            loader_m.update_modules_in_db()

        loaded = any(mod.__origin__ == url for mod in self.allmodules.modules)

        if dl_id:
            if loaded:
                await self._client.inline_query(
                    "@hikkamods_bot",
                    f"#confirm_load {dl_id}",
                )
            else:
                await self._client.inline_query(
                    "@hikkamods_bot",
                    f"#confirm_fload {dl_id}",
                )

        return loaded

    @loader.watcher("in", "only_messages", chat_id=1688624566, contains="Heta url: ")
    async def update_watcher(self, message: Message):
        if self.config["privacy_switch"]:
            return

        url = message.raw_text.split("Heta url: ")[1].strip()
        dev, repo, mod = url.lower().split("hikariatama.ru/")[1].split("/")

        if dev == "hikariatama" and repo == "ftg":
            urls = [f"https://mods.hikariatama.ru/{mod}", url]
            if any(
                getattr(module, "__origin__", None).lower().strip("/") in urls
                for module in self.allmodules.modules
            ):
                await self._load_module(urls[0])
                await asyncio.sleep(random.randint(1, 10))
                await self._client.inline_query(
                    "@hikkamods_bot",
                    f"#confirm_update_noheta {url.split('hikariatama.ru/')[1]}",
                )
                return

        if any(
            getattr(module, "__origin__", "").lower().strip("/")
            == url.lower().strip("/")
            for module in self.allmodules.modules
        ):
            await self._load_module(url)
            await asyncio.sleep(random.randint(1, 10))
            await self._client.inline_query(
                "@hikkamods_bot",
                f"#confirm_update {url.split('hikariatama.ru/')[1]}",
            )
            return

        for module in self.allmodules.modules:
            link = getattr(module, "__origin__", "").lower().strip("/")
            for regex in REGEXES:
                if regex.search(link):
                    ldev, lrepo, lmod = regex.search(link).groups()
                    if ldev == dev and lrepo == repo and lmod == mod:
                        await self._load_module(link)
                        await asyncio.sleep(random.randint(1, 10))
                        await self._client.inline_query(
                            "@hikkamods_bot",
                            f"#confirm_update_noheta {url.split('hikariatama.ru/')[1]}",
                        )
                        return

    @loader.watcher(
        "in",
        "only_messages",
        from_id=5519484330,
        regex=r"^#install:.*?\/.*?\/.*?\n.*?\n\d+\n\n.*$",
    )
    async def watcher(self, message: Message):
        if self.config["privacy_switch"]:
            logger.warning(
                "You can't download modules using buttons when `privacy_switch` option"
                " is turned on"
            )
            return

        await message.delete()

        data = re.search(
            r"^#install:(?P<file>.*?\/.*?\/.*?)\n(?P<sig>.*?)\n(?P<dl_id>\d+)\n\n.*$",
            message.raw.text,
        )

        uri = data["file"]
        try:
            rsa.verify(
                rsa.compute_hash(uri.encode(), "SHA-1"),
                base64.b64decode(data["sig"]),
                PUBKEY,
            )
        except rsa.pkcs1.VerificationError:
            logger.error("Got message with non-verified signature %s", uri)
            return

        await self._load_module(
            f"{self._api_url}/{uri}",
            int(data["dl_id"]),
        )

    @loader.inline_handler(thumb_url="https://img.icons8.com/color/512/hexa.png")
    async def heta(self, query: InlineQuery) -> typing.List[dict]:
        if not query.args:
            return {
                "title": self.strings("enter_search_query"),
                "description": self.strings("search_query_desc"),
                "message": self.strings("enter_search_query"),
                "thumb": "https://img.icons8.com/color/512/hexa.png",
            }

        if not (
            response := await utils.run_sync(
                requests.get,
                f"{self._api_url}/search",
                params={"q": query.args, "limit": 30},
            )
        ) or not (response := response.json()):
            return {
                "title": utils.remove_html(self.strings("no_results")),
                "message": self.inline.sanitise_text(self.strings("no_results")),
                "thumb": "https://img.icons8.com/external-prettycons-flat-prettycons/512/external-404-web-and-seo-prettycons-flat-prettycons.png",
            }

        return [
            {
                "title": utils.escape_html(module["module"]["name"]),
                "description": utils.escape_html(module["module"]["cls_doc"]),
                "message": self.inline.sanitise_text(
                    self._format_result(module, query.args, True)
                ),
                "thumb": module["module"]["pic"],
                "reply_markup": {
                    "text": self.strings("install"),
                    "callback": self._install,
                    "args": (
                        module["module"]["link"],
                        self._format_result(module, query.args, True),
                    ),
                },
            }
            for module in response
        ]

    @loader.command()
    async def dlh(self, message: Message):
        if not (mhash := utils.get_args_raw(message)):
            await utils.answer(message, self.strings("enter_hash"))
            return

        message = await utils.answer(message, self.strings("resolving_hash"))

        ans = await utils.run_sync(
            requests.get,
            f"{self._api_url}/resolve_hash",
            params={"hash": mhash},
            headers={
                "User-Agent": "Hikka Userbot",
                "X-Hikka-Version": ".".join(map(str, __version__)),
                "X-Hikka-Commit-SHA": utils.get_git_hash(),
                "X-Hikka-User": str(self._client.tg_id),
            },
        )

        if ans.status_code != 200:
            await utils.answer(message, self.strings("404"))
            return

        message = await utils.answer(
            message,
            self.strings("installing_from_hash").format(
                utils.escape_html(ans.json()["name"])
            ),
        )

        if await self._load_module(ans.json()["link"]):
            await utils.answer(
                message,
                self.strings("installed").format(utils.escape_html(ans.json()["name"])),
            )
        else:
            await utils.answer(message, self.strings("error"))