import axios, { AxiosError } from 'axios'
import type {
  LoginRequest,
  TokenResponse,
  UserRegister,
  RegistrationResponse,
  EmailVerificationRequest,
  VerificationResponse,
  Space,
  User,
  Settings,
  Booking,
  BookingCreate,
  BookingUpdate,
  BookingAdminCreate,
  BookingTemplate,
  BookingTemplateCreate,
  Notification,
  AuditLog,
  Attachment,
  RecurringBookingCreate,
  RecurringBookingResult,
  SpaceUsageReport,
  TopUsersReport,
  ApprovalRateReport
} from '@/types'

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

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

// Auth API
export const authApi = {
  login: async (credentials: LoginRequest): Promise<TokenResponse> => {
    const response = await api.post<TokenResponse>('/auth/login', credentials)
    return response.data
  },

  register: async (data: UserRegister): Promise<RegistrationResponse> => {
    const response = await api.post<RegistrationResponse>('/auth/register', data)
    return response.data
  },

  verifyEmail: async (data: EmailVerificationRequest): Promise<VerificationResponse> => {
    const response = await api.post<VerificationResponse>('/auth/verify', data)
    return response.data
  },

  resendVerification: async (email: string): Promise<{ message: string }> => {
    const response = await api.post<{ message: string }>('/auth/resend-verification', null, {
      params: { email }
    })
    return response.data
  }
}

// Users API
export const usersApi = {
  me: async (): Promise<User> => {
    const response = await api.get<User>('/users/me')
    return response.data
  },

  list: async (params?: { role?: string; organization?: string }): Promise<User[]> => {
    const response = await api.get<User[]>('/admin/users', { params })
    return response.data
  },

  create: async (
    data: Omit<User, 'id' | 'is_active'> & { password: string }
  ): Promise<User> => {
    const response = await api.post<User>('/admin/users', data)
    return response.data
  },

  update: async (
    id: number,
    data: Partial<Omit<User, 'id' | 'is_active'>>
  ): Promise<User> => {
    const response = await api.put<User>(`/admin/users/${id}`, data)
    return response.data
  },

  updateStatus: async (id: number, is_active: boolean): Promise<User> => {
    const response = await api.patch<User>(`/admin/users/${id}/status`, { is_active })
    return response.data
  },

  resetPassword: async (id: number, new_password: string): Promise<User> => {
    const response = await api.post<User>(`/admin/users/${id}/reset-password`, {
      new_password
    })
    return response.data
  },

  getTimezones: async (): Promise<string[]> => {
    const response = await api.get<string[]>('/users/timezones')
    return response.data
  },

  updateTimezone: async (timezone: string): Promise<{ message: string; timezone: string }> => {
    const response = await api.put<{ message: string; timezone: string }>('/users/me/timezone', {
      timezone
    })
    return response.data
  }
}

// Spaces API
export const spacesApi = {
  list: async (): Promise<Space[]> => {
    const response = await api.get<Space[]>('/spaces')
    return response.data
  },

  create: async (data: Omit<Space, 'id' | 'is_active'>): Promise<Space> => {
    const response = await api.post<Space>('/admin/spaces', data)
    return response.data
  },

  update: async (id: number, data: Omit<Space, 'id' | 'is_active'>): Promise<Space> => {
    const response = await api.put<Space>(`/admin/spaces/${id}`, data)
    return response.data
  },

  updateStatus: async (id: number, is_active: boolean): Promise<Space> => {
    const response = await api.patch<Space>(`/admin/spaces/${id}/status`, { is_active })
    return response.data
  }
}

// Settings API
export const settingsApi = {
  get: async (): Promise<Settings> => {
    const response = await api.get<Settings>('/admin/settings')
    return response.data
  },

  update: async (data: Omit<Settings, 'id'>): Promise<Settings> => {
    const response = await api.put<Settings>('/admin/settings', data)
    return response.data
  }
}

// Bookings API
export const bookingsApi = {
  getForSpace: async (spaceId: number, start: string, end: string): Promise<Booking[]> => {
    const response = await api.get<Booking[]>(`/spaces/${spaceId}/bookings`, {
      params: { start, end }
    })
    return response.data
  },

  checkAvailability: async (params: {
    space_id: number
    start_datetime: string
    end_datetime: string
  }) => {
    return api.get('/bookings/check-availability', { params })
  },

  create: async (data: BookingCreate): Promise<Booking> => {
    const response = await api.post<Booking>('/bookings', data)
    return response.data
  },

  getMy: async (status?: string): Promise<Booking[]> => {
    const response = await api.get<Booking[]>('/bookings/my', {
      params: status ? { status } : {}
    })
    return response.data
  },

  update: async (id: number, data: BookingUpdate): Promise<Booking> => {
    const response = await api.put<Booking>(`/bookings/${id}`, data)
    return response.data
  },

  createRecurring: async (data: RecurringBookingCreate): Promise<RecurringBookingResult> => {
    const response = await api.post<RecurringBookingResult>('/bookings/recurring', data)
    return response.data
  },

  getMyCalendar: async (start: string, end: string): Promise<Booking[]> => {
    const response = await api.get<Booking[]>('/bookings/my/calendar', {
      params: { start, end }
    })
    return response.data
  }
}

// Admin Bookings API
export const adminBookingsApi = {
  getAll: async (params?: {
    status?: string
    space_id?: number
    user_id?: number
    start?: string
    limit?: number
  }): Promise<Booking[]> => {
    const response = await api.get<Booking[]>('/admin/bookings/all', { params })
    return response.data
  },

  getPending: async (filters?: { space_id?: number; user_id?: number }): Promise<Booking[]> => {
    const response = await api.get<Booking[]>('/admin/bookings/pending', { params: filters })
    return response.data
  },

  approve: async (id: number): Promise<Booking> => {
    const response = await api.put<Booking>(`/admin/bookings/${id}/approve`)
    return response.data
  },

  reject: async (id: number, reason?: string): Promise<Booking> => {
    const response = await api.put<Booking>(`/admin/bookings/${id}/reject`, { reason })
    return response.data
  },

  update: async (id: number, data: BookingUpdate): Promise<Booking> => {
    const response = await api.put<Booking>(`/admin/bookings/${id}`, data)
    return response.data
  },

  reschedule: async (
    id: number,
    data: { start_datetime: string; end_datetime: string }
  ): Promise<Booking> => {
    const response = await api.put<Booking>(`/admin/bookings/${id}/reschedule`, data)
    return response.data
  },

  create: async (data: BookingAdminCreate): Promise<Booking> => {
    const response = await api.post<Booking>('/admin/bookings', data)
    return response.data
  }
}

// Notifications API
export const notificationsApi = {
  getAll: async (isRead?: boolean): Promise<Notification[]> => {
    const params = isRead !== undefined ? { is_read: isRead } : {}
    const response = await api.get<Notification[]>('/notifications', { params })
    return response.data
  },

  markAsRead: async (id: number): Promise<Notification> => {
    const response = await api.put<Notification>(`/notifications/${id}/read`)
    return response.data
  }
}

// Audit Log API
export const auditLogApi = {
  getAll: async (params?: {
    action?: string
    start_date?: string
    end_date?: string
    page?: number
    limit?: number
  }): Promise<AuditLog[]> => {
    const response = await api.get<AuditLog[]>('/admin/audit-log', { params })
    return response.data
  }
}

// Booking Templates API
export const bookingTemplatesApi = {
  getAll: async (): Promise<BookingTemplate[]> => {
    const response = await api.get<BookingTemplate[]>('/booking-templates')
    return response.data
  },

  create: async (data: BookingTemplateCreate): Promise<BookingTemplate> => {
    const response = await api.post<BookingTemplate>('/booking-templates', data)
    return response.data
  },

  delete: async (id: number): Promise<void> => {
    await api.delete(`/booking-templates/${id}`)
  },

  createBookingFromTemplate: async (
    templateId: number,
    startDatetime: string
  ): Promise<Booking> => {
    const response = await api.post<Booking>(
      `/booking-templates/from-template/${templateId}`,
      null,
      { params: { start_datetime: startDatetime } }
    )
    return response.data
  }
}

// Attachments API
export const attachmentsApi = {
  upload: async (bookingId: number, file: File): Promise<Attachment> => {
    const formData = new FormData()
    formData.append('file', file)
    const response = await api.post<Attachment>(`/bookings/${bookingId}/attachments`, formData, {
      headers: { 'Content-Type': 'multipart/form-data' }
    })
    return response.data
  },

  list: async (bookingId: number): Promise<Attachment[]> => {
    const response = await api.get<Attachment[]>(`/bookings/${bookingId}/attachments`)
    return response.data
  },

  download: (attachmentId: number): string => {
    return `/api/attachments/${attachmentId}/download`
  },

  delete: async (attachmentId: number): Promise<void> => {
    await api.delete(`/attachments/${attachmentId}`)
  }
}

// Reports API
export const reportsApi = {
  getUsage: async (params?: {
    start_date?: string
    end_date?: string
    space_id?: number
  }): Promise<SpaceUsageReport> => {
    const response = await api.get<SpaceUsageReport>('/admin/reports/usage', { params })
    return response.data
  },

  getTopUsers: async (params?: {
    start_date?: string
    end_date?: string
    limit?: number
  }): Promise<TopUsersReport> => {
    const response = await api.get<TopUsersReport>('/admin/reports/top-users', { params })
    return response.data
  },

  getApprovalRate: async (params?: {
    start_date?: string
    end_date?: string
  }): Promise<ApprovalRateReport> => {
    const response = await api.get<ApprovalRateReport>('/admin/reports/approval-rate', {
      params
    })
    return response.data
  }
}

// Google Calendar API
export const googleCalendarApi = {
  connect: async (): Promise<{ authorization_url: string; state: string }> => {
    const response = await api.get<{ authorization_url: string; state: string }>(
      '/integrations/google/connect'
    )
    return response.data
  },

  disconnect: async (): Promise<{ message: string }> => {
    const response = await api.post<{ message: string }>('/integrations/google/disconnect')
    return response.data
  },

  sync: async (): Promise<{ synced: number; created: number; updated: number; failed: number; total_bookings: number }> => {
    const response = await api.post<{ synced: number; created: number; updated: number; failed: number; total_bookings: number }>(
      '/integrations/google/sync'
    )
    return response.data
  },

  status: async (): Promise<{ connected: boolean; expires_at: string | null }> => {
    const response = await api.get<{ connected: boolean; expires_at: string | null }>(
      '/integrations/google/status'
    )
    return response.data
  }
}

// Helper to handle API errors
export const handleApiError = (error: unknown): string => {
  if (error instanceof AxiosError) {
    return error.response?.data?.detail || error.message
  }
  return 'An unexpected error occurred'
}

export default api