import hmac
import json
import os
import tempfile
from hashlib import sha1
import base64
import time
import uuid
import requests
import Config.Config
from Util.ObsUtil import ObsUploader


class LibLibUtil:
    def __init__(self):
        self.base_url = Config.Config.LIBLIB_URL
        self.access_key = Config.Config.LIBLIB_ACCESSKEY
        self.secret_key = Config.Config.LIBLIB_SECRETKEY
        self.timeout = 30

    def make_sign(self, uri):
        """生成API请求签名"""
        timestamp = str(int(time.time() * 1000))
        signature_nonce = str(uuid.uuid4())
        content = '&'.join((uri, timestamp, signature_nonce))
        
        digest = hmac.new(self.secret_key.encode(), content.encode(), sha1).digest()
        sign = base64.urlsafe_b64encode(digest).rstrip(b'=').decode()
        return sign, timestamp, signature_nonce

    def post_request(self, uri, payload):
        """发送POST请求到Liblib API"""
        try:
            sign, timestamp, signature_nonce = self.make_sign(uri)
            url = f'{self.base_url}{uri}?AccessKey={self.access_key}&Signature={sign}&Timestamp={timestamp}&SignatureNonce={signature_nonce}'
            
            headers = {'Content-Type': 'application/json'}
            response = requests.post(url, json=payload, headers=headers, timeout=self.timeout)
            response.raise_for_status()
            
            response_data = response.json()
            if response_data.get('code') == 0:
                return response_data.get('data')
            else:
                print(f"API错误: {response_data.get('message')}")
                return None
        except requests.exceptions.RequestException as e:
            print(f"请求异常: {str(e)}")
            return None
        except Exception as e:
            print(f"处理异常: {str(e)}")
            return None

    def get_model_version_info(self, version_uuid):
        """获取模型版本信息"""
        uri = "/api/model/version/get"
        payload = {"versionUuid": version_uuid}
        
        model_info = self.post_request(uri, payload)
        if model_info:
            return {
                'modelName': model_info.get('modelName'),
                'versionName': model_info.get('versionName'),
                'commercialUse': model_info.get('commercialUse'),
                'modelUrl': model_info.get('modelUrl')
            }
        return None

    def generate_text_to_image(self, template_uuid, generate_params):
        """调用text2img接口生成图片"""
        uri = "/api/generate/webui/text2img"
        payload = {
            "templateUuid": template_uuid,
            "generateParams": generate_params
        }
        return self.post_request(uri, payload)

    def get_generation_status(self, generate_uuid):
        """查询生图任务状态和结果"""
        uri = "/api/generate/webui/status"
        payload = {"generateUuid": generate_uuid}
        return self.post_request(uri, payload)

    def wait_for_generation_completion(self, generate_uuid, interval=5, max_wait_time=100):
        """等待生成完成并返回最终状态"""
        while True:
            status_data = self.get_generation_status(generate_uuid)
            if not status_data:
                print("获取状态失败，重试中...")
                time.sleep(interval)
                continue

            # 获取当前状态和进度
            generate_status = status_data.get('generateStatus')
            percent = status_data.get('percentCompleted', 0) * 100
            status_text = {
                0: "初始化",
                1: "处理中",
                2: "排队中",
                3: "已取消",
                4: "失败",
                5: "完成"
            }.get(generate_status, f"未知状态({generate_status})")

            # 显示进度和状态
            print(f"生成进度：{percent:.2f}% | 状态：{status_text}")

            # 检查是否完成
            if generate_status in [3, 4, 5]:  # 取消、失败或完成
                return status_data

            time.sleep(interval)
        
        print(f"生图任务超时（{max_wait_time}秒）")
        return None

    def download_and_upload_to_obs(slef,image_url, generate_uuid):
        """下载图片并上传到OBS"""
        try:
            # 1. 清理URL（去除可能的引号和空格）
            clean_url = image_url.strip('` ')
            print(f"清理后的图片URL: {clean_url}")

            # 2. 下载图片到临时文件
            response = requests.get(clean_url, stream=True)
            response.raise_for_status()  # 检查HTTP错误

            # 创建临时文件
            with tempfile.NamedTemporaryFile(delete=False, suffix='.png') as temp_file:
                for chunk in response.iter_content(chunk_size=8192):
                    temp_file.write(chunk)
                temp_file_path = temp_file.name
            print(f"图片已下载至临时文件: {temp_file_path}")

            # 3. 上传到OBS
            obs_uploader = ObsUploader()
            obs_object_key = f"HuangHai/Liblib/{generate_uuid}.jpg"
            success, result = obs_uploader.upload_file(
                object_key=obs_object_key,
                file_path=temp_file_path
            )

            # 4. 清理临时文件
            os.unlink(temp_file_path)

            if success:
                print(f"✅ 图片成功上传至OBS")
                return obs_object_key
            else:
                print(f"❌ OBS上传失败: {result}")
                return None

        except Exception as e:
            print(f"处理图片时发生错误: {str(e)}")
            return None

    def process_generation_task(self, generate_uuid, interval=2):
        """
        完整处理生成任务: 轮询状态 → 下载图片 → 上传OBS → 清理临时文件
        :param generate_uuid: 生成任务UUID
        :param interval: 轮询间隔(秒)
        :return: OBS路径或None
        """
        try:
            print(f"开始监控生成任务 {generate_uuid}，每{interval}秒检查一次...")
            
            # 轮询等待生成完成
            status_data = self.wait_for_generation_completion(generate_uuid, interval)
            print(f"生图状态: {json.dumps(status_data, ensure_ascii=False, indent=2)}")

            # 检查生成状态是否为5（完成）
            if status_data and status_data.get('generateStatus') == 5:
                # 提取图片URL
                if status_data.get('images') and len(status_data['images']) > 0:
                    image_url = status_data['images'][0]['imageUrl']
                    # 下载并上传到OBS
                    obs_path = self.download_and_upload_to_obs(image_url, generate_uuid)
                    return obs_path
                else:
                    print("❌ 未找到图片数据")
                    return None
            else:
                print(f"❌ 生图未完成或失败，状态码: {status_data.get('generateStatus')}")
                return None
        except Exception as e:
            print(f"处理生成任务时发生异常: {str(e)}")
            return None