import { api } from '@services/api/axios-instance';
import type {
  NotificationChannel,
  NotificationTemplate,
  NotificationTemplateCreateInput,
  NotificationPreference,
  NotificationPreferenceUpdateInput,
  Notification,
  NotificationCreateInput,
  NotificationStatus,
  InAppNotification,
  InAppNotificationCreateInput,
  InAppNotificationsFilters,
  InAppNotificationsResponse,
} from '../types';

const NOTIFICATIONS_BASE = '/api/v1/notifications';

// ============================================================================
// Channels API
// ============================================================================

export const channelsApi = {
  getAll: async (): Promise<NotificationChannel[]> => {
    const response = await api.get<NotificationChannel[]>(`${NOTIFICATIONS_BASE}/channels`);
    return response.data;
  },

  getByCode: async (code: string): Promise<NotificationChannel> => {
    const response = await api.get<NotificationChannel>(`${NOTIFICATIONS_BASE}/channels/${code}`);
    return response.data;
  },
};

// ============================================================================
// Templates API
// ============================================================================

export const templatesApi = {
  getAll: async (): Promise<NotificationTemplate[]> => {
    const response = await api.get<NotificationTemplate[]>(`${NOTIFICATIONS_BASE}/templates`);
    return response.data;
  },

  getByCode: async (code: string): Promise<NotificationTemplate> => {
    const response = await api.get<NotificationTemplate>(`${NOTIFICATIONS_BASE}/templates/${code}`);
    return response.data;
  },

  create: async (data: NotificationTemplateCreateInput): Promise<NotificationTemplate> => {
    const response = await api.post<NotificationTemplate>(`${NOTIFICATIONS_BASE}/templates`, data);
    return response.data;
  },

  update: async (id: string, data: Partial<NotificationTemplateCreateInput>): Promise<NotificationTemplate> => {
    const response = await api.patch<NotificationTemplate>(`${NOTIFICATIONS_BASE}/templates/${id}`, data);
    return response.data;
  },

  delete: async (id: string): Promise<void> => {
    await api.delete(`${NOTIFICATIONS_BASE}/templates/${id}`);
  },
};

// ============================================================================
// Preferences API
// ============================================================================

export const preferencesApi = {
  get: async (): Promise<NotificationPreference> => {
    const response = await api.get<NotificationPreference>(`${NOTIFICATIONS_BASE}/preferences`);
    return response.data;
  },

  update: async (data: NotificationPreferenceUpdateInput): Promise<NotificationPreference> => {
    const response = await api.patch<NotificationPreference>(`${NOTIFICATIONS_BASE}/preferences`, data);
    return response.data;
  },
};

// ============================================================================
// Notifications API
// ============================================================================

export const notificationsApi = {
  create: async (data: NotificationCreateInput): Promise<Notification> => {
    const response = await api.post<Notification>(`${NOTIFICATIONS_BASE}`, data);
    return response.data;
  },

  getPending: async (limit = 50): Promise<Notification[]> => {
    const response = await api.get<Notification[]>(`${NOTIFICATIONS_BASE}/pending?limit=${limit}`);
    return response.data;
  },

  updateStatus: async (id: string, status: NotificationStatus, errorMessage?: string): Promise<Notification> => {
    const response = await api.patch<Notification>(`${NOTIFICATIONS_BASE}/${id}/status`, {
      status,
      errorMessage,
    });
    return response.data;
  },
};

// ============================================================================
// In-App Notifications API
// ============================================================================

export const inAppApi = {
  getAll: async (filters: InAppNotificationsFilters = {}): Promise<InAppNotificationsResponse> => {
    const params = new URLSearchParams();
    if (filters.includeRead !== undefined) params.append('include_read', String(filters.includeRead));
    if (filters.category) params.append('category', filters.category);
    if (filters.page) params.append('page', String(filters.page));
    if (filters.limit) params.append('limit', String(filters.limit));

    const response = await api.get<InAppNotificationsResponse>(`${NOTIFICATIONS_BASE}/in-app?${params}`);
    return response.data;
  },

  getUnreadCount: async (): Promise<number> => {
    const response = await api.get<{ count: number }>(`${NOTIFICATIONS_BASE}/in-app/unread-count`);
    return response.data.count;
  },

  markAsRead: async (id: string): Promise<InAppNotification> => {
    const response = await api.post<InAppNotification>(`${NOTIFICATIONS_BASE}/in-app/${id}/read`);
    return response.data;
  },

  markAllAsRead: async (): Promise<void> => {
    await api.post(`${NOTIFICATIONS_BASE}/in-app/read-all`);
  },

  create: async (data: InAppNotificationCreateInput): Promise<InAppNotification> => {
    const response = await api.post<InAppNotification>(`${NOTIFICATIONS_BASE}/in-app`, data);
    return response.data;
  },

  archive: async (id: string): Promise<InAppNotification> => {
    const response = await api.post<InAppNotification>(`${NOTIFICATIONS_BASE}/in-app/${id}/archive`);
    return response.data;
  },

  delete: async (id: string): Promise<void> => {
    await api.delete(`${NOTIFICATIONS_BASE}/in-app/${id}`);
  },
};