from __future__ import annotations

import logging
from datetime import datetime, UTC

logger = logging.getLogger(__name__)

MESSAGE_TYPE_MAP = {
    "text": "TEXT",
    "photo": "IMAGE",
    "video": "FILE",
    "voice": "VOICE",
    "audio": "VOICE",
    "document": "FILE",
    "sticker": "IMAGE",
    "location": "TEXT",
    "contact": "TEXT",
    "poll": "EVENT",
    "callback_query": "EVENT",
}


def convert_update_to_unified(update: dict, account_id: str) -> dict | None:
    if "message" in update:
        return _convert_message(update["message"], update.get("update_id", 0), account_id)
    if "callback_query" in update:
        return _convert_callback_query(update["callback_query"], update.get("update_id", 0), account_id)
    if "edited_message" in update:
        return _convert_edited_message(update["edited_message"], update.get("update_id", 0), account_id)
    if "my_chat_member" in update:
        return _convert_my_chat_member(update["my_chat_member"], update.get("update_id", 0), account_id)
    if "poll" in update:
        return _convert_poll_update(update["poll"], update.get("update_id", 0), account_id)
    if "poll_answer" in update:
        return _convert_poll_answer(update["poll_answer"], update.get("update_id", 0), account_id)
    if "message_reaction" in update:
        return _convert_message_reaction(update["message_reaction"], update.get("update_id", 0), account_id)
    if "channel_post" in update:
        return _convert_message(update["channel_post"], update.get("update_id", 0), account_id)
    if "chat_member" in update:
        return _convert_chat_member(update["chat_member"], update.get("update_id", 0), account_id)
    if "chat_join_request" in update:
        return _convert_chat_join_request(update["chat_join_request"], update.get("update_id", 0), account_id)
    return None


def convert_fake_message_to_unified(fake_msg: object, account_id: str) -> dict | None:
    from yuxi.channel.extensions.telegram.types import FakeUpdateMessage

    msg = fake_msg if isinstance(fake_msg, FakeUpdateMessage) else FakeUpdateMessage(**fake_msg)

    sender_kind = "DIRECT" if msg.chat_type == "private" else "GROUP"

    return {
        "msg_id": f"tg:{msg.msg_id}",
        "channel_type": "telegram",
        "account_id": account_id,
        "content": msg.text or msg.caption or "",
        "message_type": MESSAGE_TYPE_MAP.get(msg.media_type or "text", "TEXT"),
        "media_urls": [msg.file_id] if msg.file_id else [],
        "sender": {
            "id": str(msg.from_id),
            "username": msg.from_username,
            "display_name": msg.from_first_name + (f" {msg.from_last_name}" if msg.from_last_name else ""),
            "is_bot": msg.from_is_bot,
            "kind": sender_kind,
        },
        "group": {
            "id": str(msg.chat_id), "title": msg.chat_title, "kind": msg.chat_type,
        } if msg.chat_type != "private" else None,
        "timestamp": datetime.fromtimestamp(msg.date, tz=UTC) if msg.date else None,
        "reply_to_id": str(msg.reply_to_message_id) if msg.reply_to_message_id else None,
        "thread_id": str(msg.message_thread_id) if msg.message_thread_id else None,
        "is_topic_message": msg.is_topic_message,
        "forwarded_from": {
            "id": str(msg.forward_from_id),
            "name": msg.forward_from_name,
        } if msg.forward_from_id else None,
        "raw_payload": {},
    }


def _convert_message(message: dict, update_id: int, account_id: str) -> dict | None:
    msg_id = f"tg:{message.get('message_id', update_id)}"
    chat = message.get("chat", {})
    from_user = message.get("from", {})
    chat_type = chat.get("type", "private")

    msg_type = _detect_message_type(message)
    text = message.get("text", "") or message.get("caption", "")

    media_urls: list[str] = []
    file_id = None
    if "photo" in message:
        photos = message["photo"]
        if photos:
            file_id = photos[-1].get("file_id", "")
            media_urls.append(file_id)
    elif "video" in message:
        file_id = message["video"].get("file_id", "")
        media_urls.append(file_id)
    elif "document" in message:
        file_id = message["document"].get("file_id", "")
        media_urls.append(file_id)
    elif "voice" in message:
        file_id = message["voice"].get("file_id", "")
        media_urls.append(file_id)
    elif "audio" in message:
        file_id = message["audio"].get("file_id", "")
        media_urls.append(file_id)

    reply_to = message.get("reply_to_message", {})
    reply_to_id = str(reply_to.get("message_id")) if reply_to else None

    is_topic = bool(message.get("is_topic_message", False))
    thread_id = str(message.get("message_thread_id")) if message.get("message_thread_id") else None

    sender_kind = "GROUP" if chat_type in ("group", "supergroup") else "DIRECT"

    forward_origin = message.get("forward_origin", {})
    forwarded_from = None
    if forward_origin:
        forwarded_from = {
            "type": forward_origin.get("type", ""),
            "sender_user_id": (
                str(forward_origin.get("sender_user", {}).get("id", ""))
                if forward_origin.get("sender_user") else None
            ),
            "sender_user_name": forward_origin.get("sender_user_name", ""),
            "chat_id": str(forward_origin.get("chat", {}).get("id", "")) if forward_origin.get("chat") else None,
            "chat_title": forward_origin.get("chat", {}).get("title", "") if forward_origin.get("chat") else "",
        }

    return {
        "msg_id": msg_id,
        "channel_type": "telegram",
        "account_id": account_id,
        "content": text,
        "message_type": msg_type,
        "media_urls": media_urls,
        "sender": {
            "id": str(from_user.get("id", "")),
            "username": from_user.get("username", ""),
            "display_name": _build_display_name(from_user),
            "is_bot": from_user.get("is_bot", False),
            "kind": sender_kind,
        },
        "group": {
            "id": str(chat.get("id", "")),
            "title": chat.get("title", chat.get("username", "")),
            "kind": chat_type,
        } if chat_type != "private" else None,
        "timestamp": datetime.fromtimestamp(message.get("date", 0), tz=UTC) if message.get("date") else None,
        "reply_to_id": reply_to_id,
        "thread_id": thread_id,
        "is_topic_message": is_topic,
        "forwarded_from": forwarded_from,
        "raw_payload": message,
    }


def _convert_callback_query(callback: dict, update_id: int, account_id: str) -> dict | None:
    from_user = callback.get("from", {})
    message = callback.get("message", {})
    chat = message.get("chat", {})

    data = callback.get("data", "")

    return {
        "msg_id": f"tg:cb:{callback.get('id', update_id)}",
        "channel_type": "telegram",
        "account_id": account_id,
        "content": data,
        "message_type": "EVENT",
        "media_urls": [],
        "sender": {
            "id": str(from_user.get("id", "")),
            "username": from_user.get("username", ""),
            "display_name": _build_display_name(from_user),
            "is_bot": from_user.get("is_bot", False),
            "kind": "DIRECT" if chat.get("type") == "private" else "GROUP",
        },
        "group": {
            "id": str(chat.get("id", "")),
            "title": chat.get("title", ""),
            "kind": chat.get("type", "private"),
        } if chat.get("type") != "private" else None,
        "timestamp": None,
        "reply_to_id": str(message.get("message_id")) if message else None,
        "thread_id": str(message.get("message_thread_id")) if message.get("message_thread_id") else None,
        "raw_payload": callback,
    }


def _detect_message_type(message: dict) -> str:
    if "text" in message:
        return "TEXT"
    if "photo" in message:
        return "IMAGE"
    if "video" in message:
        return "FILE"
    if "voice" in message or "audio" in message:
        return "VOICE"
    if "document" in message:
        return "FILE"
    if "sticker" in message:
        return "IMAGE"
    if "location" in message:
        return "TEXT"
    if "contact" in message:
        return "TEXT"
    if "poll" in message:
        return "EVENT"
    return "TEXT"


def _build_display_name(from_user: dict) -> str:
    first = from_user.get("first_name", "")
    last = from_user.get("last_name", "")
    if first and last:
        return f"{first} {last}"
    if first:
        return first
    return from_user.get("username", str(from_user.get("id", "")))


def _convert_edited_message(message: dict, update_id: int, account_id: str) -> dict | None:
    unified = _convert_message(message, update_id, account_id)
    if unified:
        unified["message_type"] = "EDITED"
    return unified


def _convert_my_chat_member(chat_member: dict, update_id: int, account_id: str) -> dict | None:
    chat = chat_member.get("chat", {})
    new_status = chat_member.get("new_chat_member", {}).get("status", "")
    old_status = chat_member.get("old_chat_member", {}).get("status", "")
    from_user = chat_member.get("from", {})

    return {
        "msg_id": f"tg:member:{update_id}",
        "channel_type": "telegram",
        "account_id": account_id,
        "content": f"bot_status_change: {old_status} → {new_status}",
        "message_type": "SYSTEM",
        "media_urls": [],
        "sender": {
            "id": str(from_user.get("id", "")),
            "username": from_user.get("username", ""),
            "display_name": _build_display_name(from_user),
            "is_bot": from_user.get("is_bot", False),
            "kind": "GROUP",
        },
        "group": {
            "id": str(chat.get("id", "")),
            "title": chat.get("title", ""),
            "kind": chat.get("type", ""),
        } if chat.get("type") != "private" else None,
        "timestamp": (
            datetime.fromtimestamp(chat_member.get("date", 0), tz=UTC)
            if chat_member.get("date") else None
        ),
        "reply_to_id": None,
        "thread_id": None,
        "raw_payload": chat_member,
    }


def _convert_poll_update(poll: dict, update_id: int, account_id: str) -> dict | None:
    return {
        "msg_id": f"tg:poll:{poll.get('id', update_id)}",
        "channel_type": "telegram",
        "account_id": account_id,
        "content": poll.get("question", ""),
        "message_type": "EVENT",
        "media_urls": [],
        "sender": {"id": "", "username": "", "display_name": "", "is_bot": False, "kind": "GROUP"},
        "group": None,
        "timestamp": (
            datetime.fromtimestamp(poll.get("close_date", 0), tz=UTC)
            if poll.get("close_date") else None
        ),
        "reply_to_id": None,
        "thread_id": None,
        "raw_payload": poll,
    }


def _convert_poll_answer(poll_answer: dict, update_id: int, account_id: str) -> dict | None:
    from_user = poll_answer.get("user", {})

    return {
        "msg_id": f"tg:poll_answer:{poll_answer.get('poll_id', update_id)}",
        "channel_type": "telegram",
        "account_id": account_id,
        "content": "poll_answer",
        "message_type": "EVENT",
        "media_urls": [],
        "sender": {
            "id": str(from_user.get("id", "")),
            "username": from_user.get("username", ""),
            "display_name": _build_display_name(from_user),
            "is_bot": from_user.get("is_bot", False),
            "kind": "GROUP",
        },
        "group": None,
        "timestamp": None,
        "reply_to_id": None,
        "thread_id": None,
        "raw_payload": poll_answer,
    }


def _convert_message_reaction(reaction: dict, update_id: int, account_id: str) -> dict | None:
    chat = reaction.get("chat", {})
    from_user = reaction.get("user", {})

    return {
        "msg_id": f"tg:reaction:{reaction.get('message_id', update_id)}",
        "channel_type": "telegram",
        "account_id": account_id,
        "content": "message_reaction",
        "message_type": "EVENT",
        "media_urls": [],
        "sender": {
            "id": str(from_user.get("id", "")),
            "username": from_user.get("username", ""),
            "display_name": _build_display_name(from_user),
            "is_bot": from_user.get("is_bot", False),
            "kind": "GROUP" if chat.get("type") in ("group", "supergroup") else "DIRECT",
        },
        "group": {
            "id": str(chat.get("id", "")),
            "title": chat.get("title", ""),
            "kind": chat.get("type", ""),
        } if chat.get("type") != "private" else None,
        "timestamp": (
            datetime.fromtimestamp(reaction.get("date", 0), tz=UTC)
            if reaction.get("date") else None
        ),
        "reply_to_id": None,
        "thread_id": None,
        "raw_payload": reaction,
    }


def _convert_chat_member(member_update: dict, update_id: int, account_id: str) -> dict | None:
    chat = member_update.get("chat", {})
    from_user = member_update.get("from", {})

    return {
        "msg_id": f"tg:cm:{update_id}",
        "channel_type": "telegram",
        "account_id": account_id,
        "content": "chat_member_update",
        "message_type": "SYSTEM",
        "media_urls": [],
        "sender": {
            "id": str(from_user.get("id", "")),
            "username": from_user.get("username", ""),
            "display_name": _build_display_name(from_user),
            "is_bot": from_user.get("is_bot", False),
            "kind": "GROUP",
        },
        "group": {
            "id": str(chat.get("id", "")),
            "title": chat.get("title", ""),
            "kind": chat.get("type", ""),
        } if chat.get("type") != "private" else None,
        "timestamp": (
            datetime.fromtimestamp(member_update.get("date", 0), tz=UTC)
            if member_update.get("date") else None
        ),
        "reply_to_id": None,
        "thread_id": None,
        "raw_payload": member_update,
    }


def _convert_chat_join_request(join_request: dict, update_id: int, account_id: str) -> dict | None:
    chat = join_request.get("chat", {})
    from_user = join_request.get("from", {})

    return {
        "msg_id": f"tg:cjr:{update_id}",
        "channel_type": "telegram",
        "account_id": account_id,
        "content": "chat_join_request",
        "message_type": "SYSTEM",
        "media_urls": [],
        "sender": {
            "id": str(from_user.get("id", "")),
            "username": from_user.get("username", ""),
            "display_name": _build_display_name(from_user),
            "is_bot": from_user.get("is_bot", False),
            "kind": "GROUP",
        },
        "group": {
            "id": str(chat.get("id", "")),
            "title": chat.get("title", ""),
            "kind": chat.get("type", ""),
        } if chat.get("type") != "private" else None,
        "timestamp": (
            datetime.fromtimestamp(join_request.get("date", 0), tz=UTC)
            if join_request.get("date") else None
        ),
        "reply_to_id": None,
        "thread_id": None,
        "raw_payload": join_request,
    }