from __future__ import annotations

from typing import Any


def describe_mattermost_message_tool() -> dict:
    return {
        "type": "function",
        "function": {
            "name": "mattermost_send_message",
            "description": "通过 Mattermost 渠道发送消息、编辑消息、删除消息、添加反应、固定/取消固定消息",
            "parameters": {
                "type": "object",
                "properties": {
                    "action": {
                        "type": "string",
                        "enum": ["send", "react", "edit", "delete", "pin", "unpin"],
                        "description": "要执行的操作类型",
                    },
                    "chat_id": {
                        "type": "string",
                        "description": "目标频道或用户的 chat_id",
                    },
                    "content": {
                        "type": "string",
                        "description": "消息内容（send 和 edit 操作需要）",
                    },
                    "msg_id": {
                        "type": "string",
                        "description": "消息 ID（edit、delete、react、pin 和 unpin 操作需要）",
                    },
                    "emoji": {
                        "type": "string",
                        "description": "表情符号名称（react 操作需要）",
                    },
                },
                "required": ["action", "chat_id"],
            },
        },
    }


def describe_mattermost_get_reactions_tool() -> dict:
    return {
        "type": "function",
        "function": {
            "name": "mattermost_get_reactions",
            "description": "获取指定消息的所有 Reaction 列表",
            "parameters": {
                "type": "object",
                "properties": {
                    "msg_id": {
                        "type": "string",
                        "description": "要查询的消息 ID",
                    },
                },
                "required": ["msg_id"],
            },
        },
    }


def describe_mattermost_list_pins_tool() -> dict:
    return {
        "type": "function",
        "function": {
            "name": "mattermost_list_pins",
            "description": "获取频道中的固定消息列表",
            "parameters": {
                "type": "object",
                "properties": {
                    "channel_id": {
                        "type": "string",
                        "description": "频道 ID",
                    },
                },
                "required": ["channel_id"],
            },
        },
    }


def describe_mattermost_search_messages_tool() -> dict:
    return {
        "type": "function",
        "function": {
            "name": "mattermost_search_messages",
            "description": "在 Mattermost 中搜索消息",
            "parameters": {
                "type": "object",
                "properties": {
                    "team_id": {
                        "type": "string",
                        "description": "Team ID",
                    },
                    "terms": {
                        "type": "string",
                        "description": "搜索关键词",
                    },
                },
                "required": ["team_id", "terms"],
            },
        },
    }


class MattermostAgentToolFactory:
    def __init__(self, adapter: Any):
        self._adapter = adapter

    def list_tools(self) -> list[dict]:
        return [
            describe_mattermost_message_tool(),
            describe_mattermost_get_reactions_tool(),
            describe_mattermost_list_pins_tool(),
            describe_mattermost_search_messages_tool(),
        ]

    async def execute_tool(self, tool_name: str, params: dict) -> Any:
        if tool_name == "mattermost_send_message":
            return await self._execute_message_action(params)
        if tool_name == "mattermost_get_reactions":
            return await self._execute_get_reactions(params)
        if tool_name == "mattermost_list_pins":
            return await self._execute_list_pins(params)
        if tool_name == "mattermost_search_messages":
            return await self._execute_search_messages(params)
        raise ValueError(f"Unknown tool: {tool_name}")

    async def _execute_message_action(self, params: dict) -> dict:
        action = params.get("action", "send")
        chat_id = params.get("chat_id", "")

        if action == "send":
            from yuxi.channels.models import (
                ChannelIdentity,
                ChannelResponse,
                ChannelType,
            )

            response = ChannelResponse(
                identity=ChannelIdentity(
                    channel_id="mattermost",
                    channel_type=ChannelType.MATTERMOST,
                    channel_user_id="",
                    channel_chat_id=chat_id,
                ),
                content=params.get("content", ""),
            )
            result = await self._adapter.send(response)
            return {"success": result.success, "message_id": result.message_id, "error": result.error}

        if action == "react":
            result = await self._adapter.send_reaction(
                chat_id=chat_id,
                msg_id=params.get("msg_id", ""),
                emoji=params.get("emoji", ""),
            )
            return {"success": result.success, "error": result.error}

        if action == "edit":
            result = await self._adapter.edit_message(
                chat_id=chat_id,
                msg_id=params.get("msg_id", ""),
                content=params.get("content", ""),
            )
            return {"success": result.success, "error": result.error}

        if action == "delete":
            result = await self._adapter.delete_message(
                chat_id=chat_id,
                msg_id=params.get("msg_id", ""),
            )
            return {"success": result.success, "error": result.error}

        if action == "pin":
            result = await self._adapter.pin_message(
                post_id=params.get("msg_id", ""),
            )
            return {"success": result, "error": "" if result else "Pin failed"}

        if action == "unpin":
            result = await self._adapter.unpin_message(
                post_id=params.get("msg_id", ""),
            )
            return {"success": result, "error": "" if result else "Unpin failed"}

        return {"success": False, "error": f"Unknown action: {action}"}

    async def _execute_get_reactions(self, params: dict) -> dict:
        result = await self._adapter.get_reactions(
            post_id=params.get("msg_id", ""),
        )
        return {"success": True, "reactions": result}

    async def _execute_list_pins(self, params: dict) -> dict:
        result = await self._adapter.list_pinned_messages(
            channel_id=params.get("channel_id", ""),
        )
        return {"success": True, "pins": result}

    async def _execute_search_messages(self, params: dict) -> dict:
        result = await self._adapter.search_messages(
            team_id=params.get("team_id", ""),
            terms=params.get("terms", ""),
        )
        return {"success": True, "results": result}