import atexit
import logging
import os
import shutil
import tempfile  # 新增导入
import uuid
from typing import Optional

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel, Field

from Config.Config import OBS_PREFIX, OBS_BUCKET, OBS_SERVER
# 导入QwenImageGenerator类
from QWenImage.QwenImageKit import QwenImageGenerator
from Util.ObsUtil import ObsUploader

# 创建路由路由器
router = APIRouter(prefix="/api/qwenImage", tags=["千问生图"])

# 配置日志
logger = logging.getLogger(__name__)

# 初始化图片生成器
image_generator = QwenImageGenerator()


class GenerateImageRequest(BaseModel):
    """生成图片请求模型"""
    prompt: str = Field(..., description="图片描述提示词")
    n: int = Field(default=1, ge=1, le=4, description="生成图片数量，范围1-4")
    size: str = Field(default="1328*1328", description="图片尺寸")
    api_key: Optional[str] = Field(default=None, description="自定义API密钥")


@router.post("/generate")
async def generate_image(request: GenerateImageRequest):
    """生成图片API接口
    
    Args:
        request: 包含生成图片参数的请求对象
        
    Returns:
        dict: 包含生成结果的字典
    """
    try:
        logger.info(f"接收到图片生成请求: prompt={request.prompt[:50]}..., n={request.n}, size={request.size}")
        
        # 如果提供了自定义API密钥，创建新的生成器实例
        generator = QwenImageGenerator(api_key=request.api_key) if request.api_key else image_generator

        # 仅生成图片，不保存本地
        result = generator.generate_image(
            prompt=request.prompt,
            n=request.n,
            size=request.size
        )
        
        # 处理结果
        if result['success']:
            logger.info(f"图片生成成功，返回{len(result['images'])}张图片")
            
            # 构造返回响应
            response = {
                "code": 200,
                "message": "图片生成成功",
                "data": {
                    "images": result['images']
                }
            }
            # 新增：无条件执行OBS上传（直接处理图片URL）
            obs_urls = []
            uploader = ObsUploader()
            for image_url in result['images']:
                try:
                    # 直接从URL下载图片二进制数据
                    import requests
                    response_img = requests.get(image_url, timeout=10)
                    response_img.raise_for_status()
                    bytes_data = response_img.content

                    # 生成UUID文件名并上传
                    jpg_file_name = f"{str(uuid.uuid4())}.jpg"
                    object_key = f"{OBS_PREFIX}/QWen3Image/{jpg_file_name}"
                    success, upload_result = uploader.upload_base64_image(object_key, bytes_data)

                    if success:
                        obs_url = f"https://{OBS_BUCKET}.{OBS_SERVER}/{object_key}"
                        obs_urls.append(obs_url)
                        logger.info(f"图片上传OBS成功: {obs_url}")
                    else:
                        logger.error(f"图片上传OBS失败: {upload_result}")
                except Exception as e:
                    logger.error(f"处理图片URL {image_url} 时出错: {str(e)}")

            response["data"]["obs_files"] = obs_urls
            return response
        else:
            logger.error(f"图片生成失败: {result['error_msg']}")
            raise HTTPException(
                status_code=500,
                detail={
                    "code": 500,
                    "message": "图片生成失败",
                    "error_detail": result['error_msg']
                }
            )
            
    except Exception as e:
        logger.exception(f"处理图片生成请求时发生异常: {str(e)}")
        raise HTTPException(
            status_code=500,
            detail={
                "code": 500,
                "message": "处理请求时发生异常",
                "error_detail": str(e)
            }
        )


@router.get("/config")
async def get_image_config():
    """获取图片生成配置信息
    
    Returns:
        dict: 包含配置信息的字典
    """
    return {
        "code": 200,
        "message": "获取配置成功",
        "data": {
            "supported_sizes": ["1328*1328", "1024*1024", "768*1024", "1024*768"],
            "max_images_per_request": 4
        }
    }


# 注册程序退出时的清理函数
@atexit.register
def clean_temp_files():
    temp_root = os.path.join(tempfile.gettempdir(), "qwen_images")
    if os.path.exists(temp_root):
        try:
            shutil.rmtree(temp_root)
            logger.info(f"临时图片目录已清理: {temp_root}")
        except Exception as e:
            logger.warning(f"清理临时文件失败: {str(e)}")