"""从微信聊天面板提取消息"""

from __future__ import annotations

import hashlib
import logging
import time
from typing import Any

import uiautomation as uia

from ..models.message import Message, MessageType

logger = logging.getLogger(__name__)


class MessageList:
    """从聊天面板中读取消息列表"""

    def __init__(self, window: uia.WindowControl) -> None:
        self._window = window
        self._chat_list: uia.ListControl | None = None

    # ------------------------------------------------------------------
    # 内部
    # ------------------------------------------------------------------

    def _ensure_chat_list(self) -> uia.ListControl | None:
        if self._chat_list is not None and self._chat_list.Exists(maxSearchSeconds=0.5):
            return self._chat_list
        try:
            # 聊天消息列表 — 搜索较深层级
            lst = self._window.ListControl(searchDepth=10)
            if lst.Exists(maxSearchSeconds=2):
                self._chat_list = lst
                return lst
        except Exception:
            logger.debug("定位聊天消息列表失败")
        return None

    @staticmethod
    def _make_msg_id(conversation: str, sender: str, content: str, ts: float) -> str:
        raw = f"{conversation}|{sender}|{content}|{ts}"
        return hashlib.md5(raw.encode()).hexdigest()

    # ------------------------------------------------------------------
    # 公开方法
    # ------------------------------------------------------------------

    def extract_messages(self, conversation: str = "") -> list[Message]:
        """提取当前聊天面板中的所有可见消息"""
        lst = self._ensure_chat_list()
        if lst is None:
            return []

        messages: list[Message] = []
        try:
            items = lst.GetChildren()
        except Exception:
            logger.exception("获取消息列表子项失败")
            return []

        for item in items:
            msg = self._parse_item(item, conversation)
            if msg is not None:
                messages.append(msg)

        return messages

    def get_latest_messages(self, conversation: str = "", since: float = 0) -> list[Message]:
        """获取指定时间戳之后的新消息"""
        all_msgs = self.extract_messages(conversation)
        return [m for m in all_msgs if m.timestamp > since]

    # ------------------------------------------------------------------
    # 解析单条消息控件
    # ------------------------------------------------------------------

    def _parse_item(self, item: uia.Control, conversation: str) -> Message | None:
        """尝试将一个 ListItem 解析为 Message"""
        try:
            name = item.Name or ""
            if not name:
                return None

            # 判断是否自己发送 — 通过控件的某些属性
            is_self = self._guess_is_self(item)
            sender = self._extract_sender(item, is_self)
            content = name  # Name 通常就是消息内容
            msg_type = self._guess_type(item, content)

            ts = time.time()
            msg_id = self._make_msg_id(conversation, sender, content, ts)

            return Message(
                msg_id=msg_id,
                conversation=conversation,
                sender=sender,
                content=content,
                msg_type=msg_type,
                timestamp=ts,
                is_self=is_self,
                raw_data={"automation_id": item.AutomationId, "class_name": item.ClassName},
            )
        except Exception:
            logger.debug("解析消息控件失败", exc_info=True)
            return None

    def _guess_is_self(self, item: uia.Control) -> bool:
        """启发式判断消息是否为自己发送"""
        try:
            # 微信中，自己的消息通常在右侧，ClassName 可能包含 "Self" 或类似标识
            cls_name = (item.ClassName or "").lower()
            if "self" in cls_name or "right" in cls_name:
                return True
            # 也可以通过位置判断（控件在父容器右侧）
            rect = item.BoundingRectangle
            parent_rect = item.GetParentControl().BoundingRectangle if item.GetParentControl() else None
            if parent_rect and rect:
                mid = (parent_rect.left + parent_rect.right) / 2
                return rect.left > mid
        except Exception:
            pass
        return False

    def _extract_sender(self, item: uia.Control, is_self: bool) -> str:
        """提取消息发送者名称"""
        try:
            # 尝试从子控件中获取发送者名称
            for child in item.GetChildren():
                name = child.Name or ""
                # 发送者名称通常较短且不是消息内容本身
                if name and len(name) < 30 and child.ControlTypeName in (
                    "TextControl", "ButtonControl",
                ):
                    return name
        except Exception:
            pass
        return "self" if is_self else "unknown"

    @staticmethod
    def _guess_type(item: uia.Control, content: str) -> MessageType:
        """启发式判断消息类型"""
        try:
            cls_name = (item.ClassName or "").lower()
            if "image" in cls_name or "pic" in cls_name:
                return MessageType.IMAGE
            if "file" in cls_name:
                return MessageType.FILE
            if "voice" in cls_name or "audio" in cls_name:
                return MessageType.VOICE
            if "video" in cls_name:
                return MessageType.VIDEO
        except Exception:
            pass

        # 内容判断
        if content.startswith("[") and content.endswith("]"):
            tag = content.strip("[]")
            if "图片" in tag or "image" in tag.lower():
                return MessageType.IMAGE
            if "文件" in tag or "file" in tag.lower():
                return MessageType.FILE
            if "语音" in tag or "voice" in tag.lower():
                return MessageType.VOICE
            if "视频" in tag or "video" in tag.lower():
                return MessageType.VIDEO

        return MessageType.TEXT