import axios from 'axios';

const API_BASE_URL = process.env.REACT_APP_API_BASE_URL || 'http://localhost:8080/api';

const api = axios.create({
  baseURL: API_BASE_URL,
  headers: {
    'Content-Type': 'application/json',
  },
});

api.interceptors.request.use((config) => {
  const token = localStorage.getItem('token');
  if (token) {
    config.headers.Authorization = `Bearer ${token}`;
  }
  return config;
});

api.interceptors.response.use(
  (response) => response,
  (error) => {
    if (error.response?.status === 401) {
      localStorage.removeItem('token');
      window.location.href = '/login';
    }
    return Promise.reject(error);
  }
);

export const authAPI = {
  login: (credentials) => api.post('/auth/login', credentials),
  register: (userData) => api.post('/auth/register', userData),
  logout: () => api.post('/auth/logout'),
  verifyToken: () => api.get('/auth/verify'),
  resetPassword: (email) => api.post('/auth/reset-password', { email }),
};

export const tasksAPI = {
  getAll: (params) => api.get('/tasks', { params }),
  getById: (id) => api.get(`/tasks/${id}`),
  create: (taskData) => api.post('/tasks', taskData),
  update: (id, taskData) => api.put(`/tasks/${id}`, taskData),
  delete: (id) => api.delete(`/tasks/${id}`),
  addComment: (id, comment) => api.post(`/tasks/${id}/comments`, { comment }),
  updateStatus: (id, status) => api.patch(`/tasks/${id}/status`, { status }),
};

export const usersAPI = {
  getAll: () => api.get('/users'),
  getById: (id) => api.get(`/users/${id}`),
  create: (userData) => api.post('/users', userData),
  update: (id, userData) => api.put(`/users/${id}`, userData),
  delete: (id) => api.delete(`/users/${id}`),
  updateProfile: (userData) => api.put('/users/profile', userData),
};

export const documentsAPI = {
  getAll: () => api.get('/documents'),
  getById: (id) => api.get(`/documents/${id}`),
  upload: (formData) => api.post('/documents/upload', formData, {
    headers: {
      'Content-Type': 'multipart/form-data',
    },
  }),
  delete: (id) => api.delete(`/documents/${id}`),
};

export const analyticsAPI = {
  getOverview: () => api.get('/analytics/overview'),
  getPerformance: (params) => api.get('/analytics/performance', { params }),
  getTaskStats: () => api.get('/analytics/tasks'),
  getUserStats: () => api.get('/analytics/users'),
};

export const reportsAPI = {
  generateTaskReport: (params) => api.get('/reports/tasks', { 
    params,
    responseType: 'blob'
  }),
  generateUserReport: (params) => api.get('/reports/users', { 
    params,
    responseType: 'blob'
  }),
  generatePerformanceReport: (params) => api.get('/reports/performance', { 
    params,
    responseType: 'blob'
  }),
};

export default api;