import type { Ref } from 'vue';

import type { AxiosProgressEvent } from '#/api/infra/file';

import { computed, unref } from 'vue';

import { useAppConfig } from '@vben/hooks';
import { $t } from '@vben/locales';

import { requestClient } from '#/api/request';

const { apiURL } = useAppConfig(import.meta.env, import.meta.env.PROD);

/**
 * 上传类型
 */
enum UPLOAD_TYPE {
  // 客户端直接上传（只支持S3服务）
  CLIENT = 'client',
  // 客户端发送到后端上传
  SERVER = 'server',
}

/**
 * 上传类型钩子函数
 * @param acceptRef 接受的文件类型
 * @param helpTextRef 帮助文本
 * @param maxNumberRef 最大文件数量
 * @param maxSizeRef 最大文件大小
 * @returns 文件类型限制和帮助文本的计算属性
 */
export function useUploadType({
  acceptRef,
  helpTextRef,
  maxNumberRef,
  maxSizeRef,
}: {
  acceptRef: Ref<string[]>;
  helpTextRef: Ref<string>;
  maxNumberRef: Ref<number>;
  maxSizeRef: Ref<number>;
}) {
  // 文件类型限制
  const getAccept = computed(() => {
    const accept = unref(acceptRef);
    if (accept && accept.length > 0) {
      return accept;
    }
    return [];
  });
  const getStringAccept = computed(() => {
    return unref(getAccept)
      .map((item) => {
        return item.indexOf('/') > 0 || item.startsWith('.')
          ? item
          : `.${item}`;
      })
      .join(',');
  });

  // 支持jpg、jpeg、png格式，不超过2M，最多可选择10张图片，。
  const getHelpText = computed(() => {
    const helpText = unref(helpTextRef);
    if (helpText) {
      return helpText;
    }
    const helpTexts: string[] = [];

    const accept = unref(acceptRef);
    if (accept.length > 0) {
      helpTexts.push($t('ui.upload.accept', [accept.join(',')]));
    }

    const maxSize = unref(maxSizeRef);
    if (maxSize) {
      helpTexts.push($t('ui.upload.maxSize', [maxSize]));
    }

    const maxNumber = unref(maxNumberRef);
    if (maxNumber && maxNumber !== Infinity) {
      helpTexts.push($t('ui.upload.maxNumber', [maxNumber]));
    }
    return helpTexts.join('，');
  });
  return { getAccept, getStringAccept, getHelpText };
}

/**
 * 上传钩子函数
 * @param directory 上传目录
 * @returns 上传 URL 和自定义上传方法
 */
export function useUpload(directory?: string) {
  // 后端上传地址
  const uploadUrl = getUploadUrl();
  // 是否使用前端直连上传
  const isClientUpload =
    UPLOAD_TYPE.CLIENT === import.meta.env.VITE_UPLOAD_TYPE;
  // 重写上传方法，统一走 system 模块 Storage API
  async function httpRequest(
    file: File,
    onUploadProgress?: AxiosProgressEvent,
  ) {
    const formData = new FormData();
    formData.append('files', file);
    const blobs = await requestClient.post('/system/storage-blob/upload', formData, {
      onUploadProgress,
      headers: { 'Content-Type': 'multipart/form-data' },
    });
    const blob = Array.isArray(blobs) ? blobs[0] : blobs;
    return blob ? { url: blob.url || blob.previewURL, name: blob.name, id: blob.id } : {};
  }

  return {
    uploadUrl,
    httpRequest,
  };
}

/**
 * 获得上传 URL（兼容旧版，实际调用走 httpRequest）
 */
export function getUploadUrl(): string {
  return `${apiURL}/system/storage-blob/upload`;
}