// API服务层，用于与后端进行交互

const API_BASE_URL = '/api';

// 通用请求函数
async function request(url, options = {}) {
  try {
    const response = await fetch(`${API_BASE_URL}${url}`, {
      ...options,
      headers: {
        'Content-Type': 'application/json',
        ...options.headers
      }
    });

    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }

    return await response.json();
  } catch (error) {
    console.error('API request error:', error);
    throw error;
  }
}

// 区域管理API
export const regionApi = {
  getAll: () => request('/regions'),
  getById: (id) => request(`/regions/${id}`),
  create: (data) => request('/regions', {
    method: 'POST',
    body: JSON.stringify(data)
  }),
  update: (id, data) => request(`/regions/${id}`, {
    method: 'PUT',
    body: JSON.stringify(data)
  }),
  delete: (id) => request(`/regions/${id}`, {
    method: 'DELETE'
  })
};

// 构建查询字符串
function buildQueryString(params) {
  const query = Object.entries(params)
    .filter(([key, value]) => value !== undefined && value !== null && value !== '')
    .map(([key, value]) => `${encodeURIComponent(key)}=${encodeURIComponent(value)}`)
    .join('&');
  return query ? `?${query}` : '';
}

// 公寓管理API
export const apartmentApi = {
  getAll: (params = {}) => request(`/apartments${buildQueryString(params)}`),
  getById: (id) => request(`/apartments/${id}`),
  create: (data) => request('/apartments', {
    method: 'POST',
    body: JSON.stringify(data)
  }),
  update: (id, data) => request(`/apartments/${id}`, {
    method: 'PUT',
    body: JSON.stringify(data)
  }),
  delete: (id) => request(`/apartments/${id}`, {
    method: 'DELETE'
  })
};

// 房间管理API
export const roomApi = {
  getAll: (params = {}) => request(`/rooms${buildQueryString(params)}`),
  getById: (id) => request(`/rooms/${id}`),
  create: (data) => request('/rooms', {
    method: 'POST',
    body: JSON.stringify(data)
  }),
  update: (id, data) => request(`/rooms/${id}`, {
    method: 'PUT',
    body: JSON.stringify(data)
  }),
  delete: (id) => request(`/rooms/${id}`, {
    method: 'DELETE'
  })
};

// 租客管理API
export const tenantApi = {
  getAll: () => request('/tenants'),
  getById: (id) => request(`/tenants/${id}`),
  create: (data) => request('/tenants', {
    method: 'POST',
    body: JSON.stringify(data)
  }),
  update: (id, data) => request(`/tenants/${id}`, {
    method: 'PUT',
    body: JSON.stringify(data)
  }),
  delete: (id) => request(`/tenants/${id}`, {
    method: 'DELETE'
  })
};

// 合同管理API
export const contractApi = {
  getAll: () => request('/contracts'),
  getById: (id) => request(`/contracts/${id}`),
  create: (data) => request('/contracts', {
    method: 'POST',
    body: JSON.stringify(data)
  }),
  update: (id, data) => request(`/contracts/${id}`, {
    method: 'PUT',
    body: JSON.stringify(data)
  }),
  delete: (id) => request(`/contracts/${id}`, {
    method: 'DELETE'
  })
};

// 租房管理API
export const rentalApi = {
  getAll: (params = {}) => request(`/rentals${buildQueryString(params)}`),
  getById: (id) => request(`/rentals/${id}`),
  create: (data) => request('/rentals', {
    method: 'POST',
    body: JSON.stringify(data)
  }),
  update: (id, data) => request(`/rentals/${id}`, {
    method: 'PUT',
    body: JSON.stringify(data)
  }),
  delete: (id) => request(`/rentals/${id}`, {
    method: 'DELETE'
  })
};

// 统计分析API
export const statisticsApi = {
  getRentData: () => request('/statistics/rent'),
  getRoomStatus: () => request('/statistics/room-status'),
  getRegionHouseStats: () => request('/statistics/region-house'),
  getRegionApartmentHouseStats: () => request('/statistics/region-apartment-house')
};

// 水费管理API
export const waterBillApi = {
  getAll: (params = {}) => request(`/water-bills${buildQueryString(params)}`),
  getById: (id) => request(`/water-bills/${id}`),
  create: (data) => request('/water-bills', {
    method: 'POST',
    body: JSON.stringify(data)
  }),
  update: (id, data) => request(`/water-bills/${id}`, {
    method: 'PUT',
    body: JSON.stringify(data)
  }),
  delete: (id) => request(`/water-bills/${id}`, {
    method: 'DELETE'
  })
};

// 电费管理API
export const electricityBillApi = {
  getAll: (params = {}) => request(`/electricity-bills${buildQueryString(params)}`),
  getById: (id) => request(`/electricity-bills/${id}`),
  create: (data) => request('/electricity-bills', {
    method: 'POST',
    body: JSON.stringify(data)
  }),
  update: (id, data) => request(`/electricity-bills/${id}`, {
    method: 'PUT',
    body: JSON.stringify(data)
  }),
  delete: (id) => request(`/electricity-bills/${id}`, {
    method: 'DELETE'
  })
};

export default {
  region: regionApi,
  apartment: apartmentApi,
  room: roomApi,
  tenant: tenantApi,
  contract: contractApi,
  rental: rentalApi,
  statistics: statisticsApi,
  waterBill: waterBillApi,
  electricityBill: electricityBillApi
};