from __future__ import annotations

import logging
from datetime import UTC, datetime

logger = logging.getLogger(__name__)


def convert_dm_event_to_unified(event: dict, account_id: str) -> dict | None:
    event_id = str(event.get("id", ""))
    event_type = event.get("event_type", "")
    if event_type != "MessageCreate":
        return None

    text = event.get("text", "")
    sender_id = str(event.get("sender_id", ""))
    conversation_id = str(event.get("dm_conversation_id", ""))

    participant_ids = event.get("participant_ids", [])
    chat_type = "direct" if len(participant_ids) <= 2 else "group"

    attachments = event.get("attachments", [])
    media_urls: list[str] = []
    attachment_media_id = None
    attachment_type = None
    if attachments:
        att = attachments[0]
        attachment_media_id = att.get("media_key", "")
        attachment_type = att.get("type", "")
        if attachment_media_id:
            media_urls.append(attachment_media_id)

    created_at = event.get("created_at", "")
    timestamp = None
    if created_at:
        try:
            timestamp = datetime.fromisoformat(created_at.replace("Z", "+00:00"))
        except ValueError:
            pass

    referenced_tweets = event.get("referenced_tweets", [])
    reply_to_id = None
    for ref in referenced_tweets:
        if ref.get("type") == "replied_to":
            reply_to_id = str(ref.get("id", ""))
            break

    return {
        "msg_id": f"tw:{event_id}",
        "channel_type": "twitter",
        "account_id": account_id,
        "content": text,
        "message_type": (
            "IMAGE"
            if attachment_type == "photo"
            else ("VIDEO" if attachment_type == "video" else "TEXT")
        ),
        "media_urls": media_urls,
        "sender": {
            "id": sender_id,
            "display_name": f"twitter:{sender_id}",
            "kind": "DIRECT" if chat_type == "direct" else "GROUP",
        },
        "group": (
            {
                "id": conversation_id,
                "kind": chat_type,
            }
            if chat_type == "group"
            else None
        ),
        "timestamp": timestamp,
        "reply_to_id": reply_to_id,
        "thread_id": None,
        "raw_payload": event,
    }


def convert_group_event_to_unified(event: dict, account_id: str) -> dict | None:
    event_type = event.get("event_type", "")
    if event_type not in ("ParticipantsJoin", "ParticipantsLeave"):
        return None

    event_id = str(event.get("id", ""))
    conversation_id = str(event.get("dm_conversation_id", ""))
    participant_ids = [str(pid) for pid in event.get("participant_ids", [])]

    action = "joined" if event_type == "ParticipantsJoin" else "left"
    description = f"Users {action} the group DM"

    created_at = event.get("created_at", "")
    timestamp = None
    if created_at:
        try:
            timestamp = datetime.fromisoformat(created_at.replace("Z", "+00:00"))
        except ValueError:
            pass

    return {
        "msg_id": f"tw:{event_id}",
        "channel_type": "twitter",
        "account_id": account_id,
        "content": description,
        "message_type": "EVENT",
        "media_urls": [],
        "sender": {
            "id": participant_ids[0] if participant_ids else "",
            "display_name": f"twitter:{participant_ids[0]}" if participant_ids else "",
            "kind": "GROUP",
        },
        "group": {"id": conversation_id, "kind": "group"},
        "timestamp": timestamp,
        "reply_to_id": None,
        "thread_id": None,
        "raw_payload": event,
        "metadata": {
            "event_type": event_type,
            "participant_ids": participant_ids,
        },
    }


def convert_webhook_event_to_unified(
    dm_event: dict, for_user_id: str, account_id: str
) -> dict | None:
    event_type = dm_event.get("type", "")
    if event_type != "message_create":
        return None

    event_id = str(dm_event.get("id", ""))
    msg_data = dm_event.get("message_create", {})
    sender_id = str(msg_data.get("sender_id", ""))
    message_data = msg_data.get("message_data", {})
    text = message_data.get("text", "")

    attachment = message_data.get("attachment", {})
    media_urls: list[str] = []
    if attachment.get("type") == "media":
        media = attachment.get("media", {})
        media_url = media.get("media_url_https", "")
        if media_url:
            media_urls.append(media_url)

    created_timestamp = dm_event.get("created_timestamp", "")
    timestamp = None
    if created_timestamp:
        try:
            ts = int(created_timestamp) / 1000
            timestamp = datetime.fromtimestamp(ts, tz=UTC)
        except (ValueError, OSError):
            pass

    return {
        "msg_id": f"tw:{event_id}",
        "channel_type": "twitter",
        "account_id": account_id,
        "content": text,
        "message_type": "IMAGE" if media_urls else "TEXT",
        "media_urls": media_urls,
        "sender": {
            "id": sender_id,
            "display_name": f"twitter:{sender_id}",
            "kind": "DIRECT",
        },
        "group": None,
        "timestamp": timestamp,
        "reply_to_id": None,
        "thread_id": None,
        "raw_payload": dm_event,
    }