const API_BASE_URL = process.env.NEXT_PUBLIC_API_BASE_URL || 'http://localhost:8080/api/v1';

export interface Texture {
  id: number;
  uploader_id: number;
  name: string;
  description?: string;
  type: 'SKIN' | 'CAPE';
  url: string;
  hash: string;
  size: number;
  is_public: boolean;
  download_count: number;
  favorite_count: number;
  is_slim: boolean;
  status: number;
  created_at: string;
  updated_at: string;
}

export interface Profile {
  uuid: string;
  user_id: number;
  name: string;
  skin_id?: number;
  cape_id?: number;
  is_active: boolean;
  last_used_at?: string;
  created_at: string;
  updated_at: string;
}

export interface PaginatedResponse<T> {
  list: T[];
  total: number;
  page: number;
  page_size: number;
  total_pages: number;
}

export interface ApiResponse<T> {
  code: number;
  message: string;
  data: T;
}

// 获取认证头
function getAuthHeaders(): HeadersInit {
  const token = typeof window !== 'undefined' ? localStorage.getItem('authToken') : null;
  return {
    'Content-Type': 'application/json',
    ...(token && { Authorization: `Bearer ${token}` }),
  };
}

// 搜索材质
export async function searchTextures(params: {
  keyword?: string;
  type?: 'SKIN' | 'CAPE';
  public_only?: boolean;
  page?: number;
  page_size?: number;
}): Promise<ApiResponse<PaginatedResponse<Texture>>> {
  const queryParams = new URLSearchParams();
  if (params.keyword) queryParams.append('keyword', params.keyword);
  if (params.type) queryParams.append('type', params.type);
  if (params.public_only !== undefined) queryParams.append('public_only', String(params.public_only));
  if (params.page) queryParams.append('page', String(params.page));
  if (params.page_size) queryParams.append('page_size', String(params.page_size));

  const response = await fetch(`${API_BASE_URL}/texture?${queryParams.toString()}`, {
    method: 'GET',
    headers: {
      'Content-Type': 'application/json',
    },
  });

  return response.json();
}

// 获取材质详情
export async function getTexture(id: number): Promise<ApiResponse<Texture>> {
  const response = await fetch(`${API_BASE_URL}/texture/${id}`, {
    method: 'GET',
    headers: {
      'Content-Type': 'application/json',
    },
  });

  return response.json();
}

// 切换收藏状态
export async function toggleFavorite(id: number): Promise<ApiResponse<{ is_favorited: boolean }>> {
  const response = await fetch(`${API_BASE_URL}/texture/${id}/favorite`, {
    method: 'POST',
    headers: getAuthHeaders(),
  });

  return response.json();
}

// 获取用户上传的材质列表
export async function getMyTextures(params: {
  page?: number;
  page_size?: number;
}): Promise<ApiResponse<PaginatedResponse<Texture>>> {
  const queryParams = new URLSearchParams();
  if (params.page) queryParams.append('page', String(params.page));
  if (params.page_size) queryParams.append('page_size', String(params.page_size));

  const response = await fetch(`${API_BASE_URL}/texture/my?${queryParams.toString()}`, {
    method: 'GET',
    headers: getAuthHeaders(),
  });

  return response.json();
}

// 获取用户收藏的材质列表
export async function getFavoriteTextures(params: {
  page?: number;
  page_size?: number;
}): Promise<ApiResponse<PaginatedResponse<Texture>>> {
  const queryParams = new URLSearchParams();
  if (params.page) queryParams.append('page', String(params.page));
  if (params.page_size) queryParams.append('page_size', String(params.page_size));

  const response = await fetch(`${API_BASE_URL}/texture/favorites?${queryParams.toString()}`, {
    method: 'GET',
    headers: getAuthHeaders(),
  });

  return response.json();
}

// 获取用户档案列表
export async function getProfiles(): Promise<ApiResponse<Profile[]>> {
  const response = await fetch(`${API_BASE_URL}/profile`, {
    method: 'GET',
    headers: getAuthHeaders(),
  });

  return response.json();
}

// 创建档案
export async function createProfile(name: string): Promise<ApiResponse<Profile>> {
  const response = await fetch(`${API_BASE_URL}/profile`, {
    method: 'POST',
    headers: getAuthHeaders(),
    body: JSON.stringify({ name }),
  });

  return response.json();
}

// 更新档案
export async function updateProfile(uuid: string, data: {
  name?: string;
  skin_id?: number;
  cape_id?: number;
}): Promise<ApiResponse<Profile>> {
  const response = await fetch(`${API_BASE_URL}/profile/${uuid}`, {
    method: 'PUT',
    headers: getAuthHeaders(),
    body: JSON.stringify(data),
  });

  return response.json();
}

// 删除档案
export async function deleteProfile(uuid: string): Promise<ApiResponse<null>> {
  const response = await fetch(`${API_BASE_URL}/profile/${uuid}`, {
    method: 'DELETE',
    headers: getAuthHeaders(),
  });

  return response.json();
}

// 设置活跃档案
export async function setActiveProfile(uuid: string): Promise<ApiResponse<{ message: string }>> {
  const response = await fetch(`${API_BASE_URL}/profile/${uuid}/activate`, {
    method: 'POST',
    headers: getAuthHeaders(),
  });

  return response.json();
}

// 获取用户信息
export async function getUserProfile(): Promise<ApiResponse<{
  id: number;
  username: string;
  email: string;
  avatar?: string;
  points: number;
  role: string;
  status: number;
  last_login_at?: string;
  created_at: string;
  updated_at: string;
}>> {
  const response = await fetch(`${API_BASE_URL}/user/profile`, {
    method: 'GET',
    headers: getAuthHeaders(),
  });

  return response.json();
}

// 更新用户信息
export async function updateUserProfile(data: {
  avatar?: string;
  old_password?: string;
  new_password?: string;
}): Promise<ApiResponse<{
  id: number;
  username: string;
  email: string;
  avatar?: string;
  points: number;
  role: string;
  status: number;
  last_login_at?: string;
  created_at: string;
  updated_at: string;
}>> {
  const response = await fetch(`${API_BASE_URL}/user/profile`, {
    method: 'PUT',
    headers: getAuthHeaders(),
    body: JSON.stringify(data),
  });

  return response.json();
}

// 直接上传皮肤文件
export async function uploadTexture(file: File, data: {
  name: string;
  description?: string;
  type?: 'SKIN' | 'CAPE';
  is_public?: boolean;
  is_slim?: boolean;
}): Promise<ApiResponse<Texture>> {
  const formData = new FormData();
  formData.append('file', file);
  formData.append('name', data.name);
  if (data.description) formData.append('description', data.description);
  if (data.type) formData.append('type', data.type);
  if (data.is_public !== undefined) formData.append('is_public', String(data.is_public));
  if (data.is_slim !== undefined) formData.append('is_slim', String(data.is_slim));

  const response = await fetch(`${API_BASE_URL}/texture/upload`, {
    method: 'POST',
    headers: {
      ...(typeof window !== 'undefined' ? { Authorization: `Bearer ${localStorage.getItem('authToken')}` } : {}),
    },
    body: formData,
  });

  return response.json();
}

// 生成头像上传URL
export async function generateAvatarUploadUrl(fileName: string): Promise<ApiResponse<{
  post_url: string;
  form_data: Record<string, string>;
  avatar_url: string;
  expires_in: number;
}>> {
  const response = await fetch(`${API_BASE_URL}/user/avatar/upload-url`, {
    method: 'POST',
    headers: getAuthHeaders(),
    body: JSON.stringify({ file_name: fileName }),
  });

  return response.json();
}

// 更新头像URL
export async function updateAvatarUrl(avatarUrl: string): Promise<ApiResponse<{
  id: number;
  username: string;
  email: string;
  avatar: string;
  points: number;
  role: string;
  status: number;
  last_login_at?: string;
  created_at: string;
  updated_at: string;
}>> {
  const response = await fetch(`${API_BASE_URL}/user/avatar?avatar_url=${encodeURIComponent(avatarUrl)}`, {
    method: 'PUT',
    headers: getAuthHeaders(),
  });

  return response.json();
}