// 如果设置了VITE_API_URL环境变量，使用它；否则在开发环境使用相对路径（通过vite代理），生产环境使用默认值
const API_BASE_URL = import.meta.env.VITE_API_URL || (import.meta.env.DEV ? '' : 'http://localhost:8000');

// 构建API URL的辅助函数，避免双斜杠和格式问题
const buildUrl = (path) => {
  const baseUrl = API_BASE_URL.endsWith('/') ? API_BASE_URL.slice(0, -1) : API_BASE_URL;
  const cleanPath = path.startsWith('/') ? path : `/${path}`;
  return baseUrl ? `${baseUrl}${cleanPath}` : cleanPath;
};

export const api = {
  // 配置管理
  getConfigs: async () => {
    const response = await fetch(buildUrl('/api/config'));
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取配置失败' }));
      throw new Error(error.detail || '获取配置失败');
    }
    return response.json();
  },
  
  getConfig: async (key) => {
    const response = await fetch(buildUrl(`/api/config/${key}`));
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取配置失败' }));
      throw new Error(error.detail || '获取配置失败');
    }
    return response.json();
  },
  
  updateConfig: async (key, data) => {
    const response = await fetch(buildUrl(`/api/config/${key}`), {
      method: 'PUT',
      headers: {'Content-Type': 'application/json'},
      body: JSON.stringify(data)
    });
    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || '更新配置失败');
    }
    return response.json();
  },
  
  updateConfigsBatch: async (configs) => {
    const response = await fetch(buildUrl('/api/config/batch'), {
      method: 'POST',
      headers: {'Content-Type': 'application/json'},
      body: JSON.stringify(configs)
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '批量更新配置失败' }));
      throw new Error(error.detail || '批量更新配置失败');
    }
    return response.json();
  },
  
  // 检查配置可行性
  checkConfigFeasibility: async () => {
    const response = await fetch(buildUrl('/api/config/feasibility-check'));
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '检查配置可行性失败' }));
      throw new Error(error.detail || '检查配置可行性失败');
    }
    return response.json();
  },
  
  // 交易记录
  getTrades: async (params = {}) => {
    const query = new URLSearchParams(params).toString();
    const url = query ? `${buildUrl('/api/trades')}?${query}` : buildUrl('/api/trades');
    const response = await fetch(url, {
      method: 'GET',
      headers: {
        'Content-Type': 'application/json',
      },
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取交易记录失败' }));
      throw new Error(error.detail || '获取交易记录失败');
    }
    return response.json();
  },
  
  getTradeStats: async (params = {}) => {
    const query = new URLSearchParams(params).toString();
    const url = query ? `${buildUrl('/api/trades/stats')}?${query}` : buildUrl('/api/trades/stats');
    const response = await fetch(url, {
      method: 'GET',
      headers: {
        'Content-Type': 'application/json',
      },
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取交易统计失败' }));
      throw new Error(error.detail || '获取交易统计失败');
    }
    return response.json();
  },
  
  // 统计
  getPerformance: async (days = 7) => {
    const response = await fetch(buildUrl(`/api/stats/performance?days=${days}`));
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取性能统计失败' }));
      throw new Error(error.detail || '获取性能统计失败');
    }
    return response.json();
  },
  
  getDashboard: async () => {
    const response = await fetch(buildUrl('/api/dashboard'));
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取仪表板数据失败' }));
      throw new Error(error.detail || '获取仪表板数据失败');
    }
    return response.json();
  },
  
  // 平仓操作
  closePosition: async (symbol) => {
    const response = await fetch(buildUrl(`/api/account/positions/${symbol}/close`), {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '平仓失败' }));
      throw new Error(error.detail || '平仓失败');
    }
    return response.json();
  },
  
  // 同步持仓状态
  syncPositions: async () => {
    const response = await fetch(buildUrl('/api/account/positions/sync'), {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '同步失败' }));
      throw new Error(error.detail || '同步失败');
    }
    return response.json();
  },
  
  // 交易推荐
  getRecommendations: async (params = {}) => {
    // 默认使用实时推荐
    if (!params.type) {
      params.type = 'realtime'
    }
    const query = new URLSearchParams(params).toString();
    const url = query ? `${buildUrl('/api/recommendations')}?${query}` : buildUrl('/api/recommendations');
    const response = await fetch(url);
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取推荐失败' }));
      throw new Error(error.detail || '获取推荐失败');
    }
    return response.json();
  },
  
  bookmarkRecommendation: async (recommendationData) => {
    const response = await fetch(buildUrl('/api/recommendations/bookmark'), {
      method: 'POST',
      headers: {'Content-Type': 'application/json'},
      body: JSON.stringify(recommendationData)
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '标记推荐失败' }));
      throw new Error(error.detail || '标记推荐失败');
    }
    return response.json();
  },
  
  getActiveRecommendations: async () => {
    const response = await fetch(buildUrl('/api/recommendations/active'));
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取有效推荐失败' }));
      throw new Error(error.detail || '获取有效推荐失败');
    }
    return response.json();
  },
  
  getRecommendation: async (id) => {
    const response = await fetch(buildUrl(`/api/recommendations/${id}`));
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取推荐详情失败' }));
      throw new Error(error.detail || '获取推荐详情失败');
    }
    return response.json();
  },
  
  generateRecommendations: async (minSignalStrength = 5, maxRecommendations = 20) => {
    const response = await fetch(
      buildUrl(`/api/recommendations/generate?min_signal_strength=${minSignalStrength}&max_recommendations=${maxRecommendations}`),
      {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
      }
    );
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '生成推荐失败' }));
      throw new Error(error.detail || '生成推荐失败');
    }
    return response.json();
  },
  
  markRecommendationExecuted: async (id, tradeId = null) => {
    const response = await fetch(buildUrl(`/api/recommendations/${id}/execute`), {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({ trade_id: tradeId }),
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '标记执行失败' }));
      throw new Error(error.detail || '标记执行失败');
    }
    return response.json();
  },
  
  cancelRecommendation: async (id, notes = null) => {
    const response = await fetch(buildUrl(`/api/recommendations/${id}/cancel`), {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({ notes }),
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '取消推荐失败' }));
      throw new Error(error.detail || '取消推荐失败');
    }
    return response.json();
  },

  // 系统控制（supervisor）
  clearSystemCache: async () => {
    const response = await fetch(buildUrl('/api/system/clear-cache'), {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '清理缓存失败' }));
      throw new Error(error.detail || '清理缓存失败');
    }
    return response.json();
  },

  getTradingSystemStatus: async () => {
    const response = await fetch(buildUrl('/api/system/trading/status'));
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '获取交易系统状态失败' }));
      throw new Error(error.detail || '获取交易系统状态失败');
    }
    return response.json();
  },

  startTradingSystem: async () => {
    const response = await fetch(buildUrl('/api/system/trading/start'), {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '启动交易系统失败' }));
      throw new Error(error.detail || '启动交易系统失败');
    }
    return response.json();
  },

  stopTradingSystem: async () => {
    const response = await fetch(buildUrl('/api/system/trading/stop'), {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '停止交易系统失败' }));
      throw new Error(error.detail || '停止交易系统失败');
    }
    return response.json();
  },

  restartTradingSystem: async () => {
    const response = await fetch(buildUrl('/api/system/trading/restart'), {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
    });
    if (!response.ok) {
      const error = await response.json().catch(() => ({ detail: '重启交易系统失败' }));
      throw new Error(error.detail || '重启交易系统失败');
    }
    return response.json();
  },
};