"""
历史数据平台API客户端
最小化实现，只包含必要的功能
"""

import json
import requests
from pathlib import Path
from typing import Dict, List, Optional
from datetime import datetime, timedelta


class HistoricalDataPlatformClient:
    """
    历史数据平台API客户端
    """
    
    def __init__(
        self,
        base_url: str = "",
        api_key: Optional[str] = None,
        timeout: int = 30,
        retry_times: int = 3
    ):
        """
        初始化API客户端
        
        参数:
            base_url: API基础URL
            api_key: API密钥（可选）
            timeout: 超时时间（秒）
            retry_times: 重试次数
        """
        self.base_url = base_url.rstrip('/')
        self.api_key = api_key
        self.timeout = timeout
        self.retry_times = retry_times
        
        # 从配置文件加载（如果base_url为空）
        if not self.base_url:
            self._load_config()
    
    def _load_config(self):
        """从配置文件加载API配置"""
        try:
            config_path = Path(__file__).parent.parent / "configs" / "api_config.json"
            if config_path.exists():
                with open(config_path, 'r', encoding='utf-8') as f:
                    config = json.load(f)
                    api_config = config.get('historical_data_platform', {})
                    self.base_url = api_config.get('base_url', '')
                    self.api_key = api_config.get('api_key') or self.api_key
                    self.timeout = api_config.get('timeout', 30)
                    self.retry_times = api_config.get('retry_times', 3)
        except Exception as e:
            print(f"⚠️  加载API配置失败: {e}")
    
    def _request(
        self,
        method: str,
        endpoint: str,
        params: Optional[Dict] = None,
        data: Optional[Dict] = None
    ) -> Optional[Dict]:
        """发送HTTP请求"""
        if not self.base_url:
            print("⚠️  API base_url未配置")
            return None
        
        url = f"{self.base_url}{endpoint}"
        headers = {'Content-Type': 'application/json'}
        if self.api_key:
            headers['Authorization'] = f'Bearer {self.api_key}'
        
        for attempt in range(self.retry_times):
            try:
                if method.upper() == 'GET':
                    response = requests.get(url, params=params, headers=headers, timeout=self.timeout)
                else:
                    response = requests.post(url, json=data, params=params, headers=headers, timeout=self.timeout)
                
                response.raise_for_status()
                return response.json()
            except requests.exceptions.RequestException as e:
                if attempt == self.retry_times - 1:
                    print(f"⚠️  API请求失败: {e}")
                    return None
                continue
        
        return None
    
    def get_raw_data(
        self,
        device_id: str,
        days: int = 7,
        start_date: Optional[str] = None,
        end_date: Optional[str] = None
    ) -> Optional[Dict]:
        """
        获取用户原始数据
        
        参数:
            device_id: 用户ID
            days: 过去N天（如果start_date和end_date未提供）
            start_date: 开始日期（YYYY-MM-DD格式）
            end_date: 结束日期（YYYY-MM-DD格式）
        
        返回:
            {
                "deviceId": "user123",
                "data_points": [...],
                "total_count": 100
            }
        """
        endpoint = f"/api/raw-data/{device_id}"
        params = {}
        
        if start_date and end_date:
            params['start_date'] = start_date
            params['end_date'] = end_date
        else:
            params['days'] = days
        
        return self._request('GET', endpoint, params=params)
    
    def get_user_profile(self, device_id: str) -> Optional[Dict]:
        """
        获取用户个性化信息
        
        返回:
            {
                "deviceId": "user123",
                "age_group": "30-35岁",
                "sex": "男性",
                ...
            }
        """
        endpoint = f"/api/user-profile/{device_id}"
        return self._request('GET', endpoint)
    
    def get_historical_results(
        self,
        device_id: str,
        days: int = 7
    ) -> Optional[Dict]:
        """
        获取历史检测结果
        
        返回:
            {
                "deviceId": "user123",
                "daily_results": [...]
            }
        """
        endpoint = f"/api/historical-results/{device_id}"
        params = {'days': days}
        return self._request('GET', endpoint, params=params)