from fastapi import APIRouter, Depends, HTTPException
from app.core.database import get_db_connection
from app.core.auth import get_current_admin_user
from app.core.response import create_api_response
from app.core.config import QWEN_API_KEY
from app.services.system_config_service import SystemConfigService
from pydantic import BaseModel
from typing import Optional, List
import json
import dashscope
from dashscope.audio.asr import VocabularyService
from datetime import datetime
from http import HTTPStatus

router = APIRouter()

class HotWordItem(BaseModel):
    id: int
    text: str
    weight: int
    lang: str
    status: int
    create_time: datetime
    update_time: datetime

class CreateHotWordRequest(BaseModel):
    text: str
    weight: int = 4
    lang: str = "zh"
    status: int = 1

class UpdateHotWordRequest(BaseModel):
    text: Optional[str] = None
    weight: Optional[int] = None
    lang: Optional[str] = None
    status: Optional[int] = None

@router.get("/admin/hot-words", response_model=dict)
async def list_hot_words(current_user: dict = Depends(get_current_admin_user)):
    """获取热词列表"""
    try:
        with get_db_connection() as conn:
            cursor = conn.cursor(dictionary=True)
            cursor.execute("SELECT * FROM hot_words ORDER BY update_time DESC")
            items = cursor.fetchall()
            cursor.close()
            return create_api_response(code="200", message="获取成功", data=items)
    except Exception as e:
        return create_api_response(code="500", message=f"获取失败: {str(e)}")

@router.post("/admin/hot-words", response_model=dict)
async def create_hot_word(request: CreateHotWordRequest, current_user: dict = Depends(get_current_admin_user)):
    """创建热词"""
    try:
        with get_db_connection() as conn:
            cursor = conn.cursor()
            query = "INSERT INTO hot_words (text, weight, lang, status) VALUES (%s, %s, %s, %s)"
            cursor.execute(query, (request.text, request.weight, request.lang, request.status))
            new_id = cursor.lastrowid
            conn.commit()
            cursor.close()
            return create_api_response(code="200", message="创建成功", data={"id": new_id})
    except Exception as e:
        return create_api_response(code="500", message=f"创建失败: {str(e)}")

@router.put("/admin/hot-words/{id}", response_model=dict)
async def update_hot_word(id: int, request: UpdateHotWordRequest, current_user: dict = Depends(get_current_admin_user)):
    """更新热词"""
    try:
        with get_db_connection() as conn:
            cursor = conn.cursor()
            update_fields = []
            params = []
            if request.text is not None:
                update_fields.append("text = %s")
                params.append(request.text)
            if request.weight is not None:
                update_fields.append("weight = %s")
                params.append(request.weight)
            if request.lang is not None:
                update_fields.append("lang = %s")
                params.append(request.lang)
            if request.status is not None:
                update_fields.append("status = %s")
                params.append(request.status)
            
            if not update_fields:
                return create_api_response(code="400", message="无更新内容")
            
            query = f"UPDATE hot_words SET {', '.join(update_fields)} WHERE id = %s"
            params.append(id)
            cursor.execute(query, tuple(params))
            conn.commit()
            cursor.close()
            return create_api_response(code="200", message="更新成功")
    except Exception as e:
        return create_api_response(code="500", message=f"更新失败: {str(e)}")

@router.delete("/admin/hot-words/{id}", response_model=dict)
async def delete_hot_word(id: int, current_user: dict = Depends(get_current_admin_user)):
    """删除热词"""
    try:
        with get_db_connection() as conn:
            cursor = conn.cursor()
            cursor.execute("DELETE FROM hot_words WHERE id = %s", (id,))
            conn.commit()
            cursor.close()
            return create_api_response(code="200", message="删除成功")
    except Exception as e:
        return create_api_response(code="500", message=f"删除失败: {str(e)}")

@router.post("/admin/hot-words/sync", response_model=dict)
async def sync_hot_words(current_user: dict = Depends(get_current_admin_user)):
    """同步热词到阿里云 DashScope"""
    try:
        dashscope.api_key = QWEN_API_KEY

        # 1. 获取所有启用的热词
        with get_db_connection() as conn:
            cursor = conn.cursor(dictionary=True)
            cursor.execute("SELECT text, weight, lang FROM hot_words WHERE status = 1")
            hot_words = cursor.fetchall()
            cursor.close()

            # 2. 获取现有的 vocabulary_id
            existing_vocab_id = SystemConfigService.get_asr_vocabulary_id()

            # 构建热词列表
            vocabulary_list = [{"text": hw['text'], "weight": hw['weight'], "lang": hw['lang']} for hw in hot_words]

            if not vocabulary_list:
                return create_api_response(code="400", message="没有启用的热词可同步")

            # 3. 调用阿里云 API
            service = VocabularyService()
            vocab_id = existing_vocab_id

            try:
                if existing_vocab_id:
                    # 尝试更新现有的热词表
                    try:
                        service.update_vocabulary(
                            vocabulary_id=existing_vocab_id,
                            vocabulary=vocabulary_list
                        )
                        # 更新成功，保持原有ID
                    except Exception as update_error:
                        # 如果更新失败（如资源不存在），尝试创建新的
                        print(f"Update vocabulary failed: {update_error}, trying to create new one.")
                        existing_vocab_id = None # 重置，触发创建逻辑

                if not existing_vocab_id:
                    # 创建新的热词表
                    vocab_id = service.create_vocabulary(
                        prefix='imeeting',
                        target_model='paraformer-v2',
                        vocabulary=vocabulary_list
                    )

            except Exception as api_error:
                 return create_api_response(code="500", message=f"同步到阿里云失败: {str(api_error)}")

            # 4. 更新数据库中的 vocabulary_id
            if vocab_id:
                SystemConfigService.set_config(
                    SystemConfigService.ASR_VOCABULARY_ID,
                    vocab_id
                )

            return create_api_response(code="200", message="同步成功", data={"vocabulary_id": vocab_id})

    except Exception as e:
        return create_api_response(code="500", message=f"同步异常: {str(e)}")