/**
 * MinIO 存储管理 API 客户端
 * 基于 /api/v2/storage 接口
 */

import { apiRequest } from '../axios-client';

export interface CopyFileRequest {
  source_path: string;
  destination_path: string;
  source_bucket?: string | null;
  destination_bucket?: string | null;
}

export interface CopyFileResponse {
  success: boolean;
  message: string;
  source_path: string;
  destination_path: string;
}

export interface MoveFileRequest {
  source_path: string;
  destination_path: string;
}

export interface MoveFileResponse {
  success: boolean;
  message: string;
  source_path: string;
  destination_path: string;
}

export interface DeleteFileRequest {
  file_path: string;
}

export interface DeleteFileResponse {
  success: boolean;
  message: string;
  file_path: string;
}

/**
 * 复制文件
 * @param request 复制文件请求参数
 * @param token JWT token（可选）
 * @returns 复制结果
 */
export async function copyFile(request: CopyFileRequest, token?: string) {
  const response = await apiRequest<CopyFileResponse>(
    '/api/v2/storage/files/copy',
    {
      method: 'POST',
      data: request,
      headers: {
        ...(token ? { 'Authorization': `Bearer ${token}` } : {})
      }
    }
  );

  if (response.error) {
    throw new Error(response.error);
  }

  return response.data;
}

/**
 * 移动/重命名文件
 * @param request 移动文件请求参数
 * @param token JWT token（可选）
 * @returns 移动结果
 */
export async function moveFile(request: MoveFileRequest, token?: string) {
  const response = await apiRequest<MoveFileResponse>(
    '/api/v2/storage/files/move',
    {
      method: 'POST',
      data: request,
      headers: {
        ...(token ? { 'Authorization': `Bearer ${token}` } : {})
      }
    }
  );

  if (response.error) {
    throw new Error(response.error);
  }

  return response.data;
}

/**
 * 删除文件
 * @param request 删除文件请求参数
 * @param token JWT token（可选）
 * @returns 删除结果
 */
export async function deleteFile(request: DeleteFileRequest, token?: string) {
  const response = await apiRequest<DeleteFileResponse>(
    '/api/v2/storage/files',
    {
      method: 'DELETE',
      headers: {
        ...(token ? { 'Authorization': `Bearer ${token}` } : {})
      }
    },
    { file_path: request.file_path }
  );

  if (response.error) {
    throw new Error(response.error);
  }

  return response.data;
}

/**
 * 生成新的文件路径（用于复制模板文件）
 * @param originalPath 原始文件路径
 * @param area 地区代码
 * @returns 新文件路径
 */
export function generateDraftFilePath(originalPath: string, area: string): string {
  // 提取文件目录和文件名
  const lastSlashIndex = originalPath.lastIndexOf('/');
  const directory = lastSlashIndex >= 0 ? originalPath.substring(0, lastSlashIndex) : '';
  const fileName = lastSlashIndex >= 0 ? originalPath.substring(lastSlashIndex + 1) : originalPath;

  // 提取文件扩展名
  const lastDotIndex = fileName.lastIndexOf('.');
  const baseName = lastDotIndex >= 0 ? fileName.substring(0, lastDotIndex) : fileName;
  const extension = lastDotIndex >= 0 ? fileName.substring(lastDotIndex) : '';

  // 生成时间戳和 UUID
  const timestamp = Date.now();
  const uuid = generateUUID();

  // 构建新文件名：原文件名_地区_时间戳_uuid.扩展名
  const newFileName = `${baseName}_${area}_${timestamp}_${uuid}${extension}`;

  // 构建完整路径
  const newPath = directory ? `${directory}/${newFileName}` : newFileName;

  return newPath;
}

/**
 * 生成简单的 UUID（不依赖外部库）
 * @returns UUID 字符串
 */
function generateUUID(): string {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    const r = Math.random() * 16 | 0;
    const v = c === 'x' ? r : (r & 0x3 | 0x8);
    return v.toString(16);
  });
}