/**
 * API для профиля и настроек
 */

import apiClient from '@/lib/api-client';
import type { User } from './auth';

export interface CityOption {
  name: string;
  timezone?: string;
  region?: string;
  full_name?: string;
}

export interface MentorHomeworkAISettings {
  ai_trust_draft?: boolean;
  ai_trust_publish?: boolean;
}

export interface ProfileSettings {
  preferences: {
    timezone?: string;
    country?: string;
    city?: string;
  };
  notifications: {
    email_notifications?: boolean;
    telegram_notifications?: boolean;
    in_app_notifications?: boolean;
  };
  /** Только для ментора: доверие AI при проверке ДЗ */
  mentor_homework_ai?: MentorHomeworkAISettings;
}

export async function getProfileSettings(): Promise<ProfileSettings> {
  const response = await apiClient.get<ProfileSettings>('/profile/settings/');
  return response.data;
}

export async function updateProfileSettings(data: Partial<ProfileSettings>): Promise<void> {
  await apiClient.patch('/profile/update_settings/', data);
}

export async function searchCitiesFromCSV(query: string, limit = 50): Promise<CityOption[]> {
  try {
    const params = new URLSearchParams();
    params.set('q', query);
    params.set('limit', limit.toString());
    const response = await apiClient.get<CityOption[]>(`/profile/cities/search/?${params.toString()}`);
    return Array.isArray(response.data) ? response.data : [];
  } catch {
    return [];
  }
}

export interface UpdateProfileData {
  first_name?: string;
  last_name?: string;
  phone?: string;
  email?: string;
  bio?: string;
  avatar?: File | null;
}

/** Кэш аватаров — не делаем повторных запросов в течение сессии */
const avatarUrlCache = new Map<string, { url: string | null; timestamp: number }>();
const AVATAR_CACHE_TTL = 5 * 60 * 1000; // 5 минут

/** URL аватара пользователя по ID (для плейсхолдера в видеоконференции). GET /api/users/<id>/avatar_url/ */
export async function getAvatarUrl(userId: number | string): Promise<string | null> {
  const key = String(userId);
  const cached = avatarUrlCache.get(key);
  if (cached && Date.now() - cached.timestamp < AVATAR_CACHE_TTL) {
    return cached.url;
  }
  try {
    const response = await apiClient.get<{ avatar_url: string | null }>(`/users/${userId}/avatar_url/`);
    const url = response.data?.avatar_url ?? null;
    avatarUrlCache.set(key, { url, timestamp: Date.now() });
    return url;
  } catch {
    avatarUrlCache.set(key, { url: null, timestamp: Date.now() });
    return null;
  }
}

/** Загрузить аватар из Telegram (требуется привязанный Telegram). */
export async function loadTelegramAvatar(): Promise<User> {
  const response = await apiClient.post<{ success?: boolean; user: User }>('/profile/load_telegram_avatar/');
  const data = response.data as { success?: boolean; user?: User };
  return data?.user ?? (data as unknown as User);
}

export async function updateProfile(data: UpdateProfileData): Promise<User> {
  if (data.avatar !== undefined && data.avatar !== null && data.avatar instanceof File) {
    const formData = new FormData();
    if (data.first_name) formData.append('first_name', data.first_name);
    if (data.last_name) formData.append('last_name', data.last_name);
    if (data.phone) formData.append('phone', data.phone);
    if (data.email) formData.append('email', data.email);
    if (data.bio) formData.append('bio', data.bio);
    formData.append('avatar', data.avatar);
    const res = await apiClient.getInstance().patch<User>('/profile/update_profile/', formData);
    return res.data;
  }
  if (data.avatar === null) {
    const formData = new FormData();
    if (data.first_name) formData.append('first_name', data.first_name);
    if (data.last_name) formData.append('last_name', data.last_name);
    if (data.phone) formData.append('phone', data.phone);
    if (data.email) formData.append('email', data.email);
    formData.append('avatar', '');
    const res = await apiClient.getInstance().patch<User>('/profile/update_profile/', formData);
    return res.data;
  }
  const response = await apiClient.patch<User>('/profile/update_profile/', data);
  return response.data;
}