import axios from "axios";

/**
 * oss resize 参数
 * 详情见 https://help.aliyun.com/document_detail/44688.html?spm=a2c4g.11186623.6.751.7434663c1Ne07e
 */

interface OSSResizeOptions {
  scale?: number;
  w?: number;
  h?: number;
  watermark?: string;
  [key: string]: any;
}

interface OSSImageInfoOptions {
  [key: string]: any;
}

interface ImageInfo {
  [key: string]: any;
}



function createParmas(key: string, value: any) {
  return `${key}_${value}`
}

export function ossResize(url: string, options: OSSResizeOptions = {}): string {
  if (!url) return ''
  try {
    const target = new URL(url)
    const parmas = target.searchParams

    const list = ['image/resize']
    //scale 追加scale 参数 默认为2
    if(options.scale === undefined){
      options.scale  = 2
    }
    if(options.w ){
      options.w = options.w*options.scale
    }
    if(options.h){
      options.h = options.h*options.scale
    }


/*
    // 水印
    if (options.watermark) {
      list.push(
        createParmas('watermark', {
          ...options.watermark,
        })
      )
    }

*/


    Object.keys(options).forEach((key) => {
      if(!['watermark','scale'].includes(key)){
        const value = options[key]
        list.push(createParmas(key, value))
      }

    })


    const watermark = []
    if (options.watermark) {
      watermark.push('image/watermark')
      watermark.push('image_' + options.watermark)
    }

    let str = list.join(',')
    if(watermark.length  >0){
      if(str){
        str+= ','+watermark.join(',')
      }else{
        str+= watermark.join(',')
      }
    }
    parmas.set('x-oss-process',str + '/quality,Q_80')

    return target.toString()
  } catch (error) {
    console.warn(url)
    console.warn(error)
    return url
  }
}



export async function ossImageInfo(url: string, options: OSSImageInfoOptions = {}): Promise<ImageInfo | undefined> {
  if (!url) return ''
  try {
    const target = new URL(url)
    const parmas = target.searchParams
    const list = ['image/info']
    Object.keys(options).forEach((key) => {
      const value = options[key]
      list.push(createParmas(key, value))
    })
    parmas.set('x-oss-process', list.join(',') + '/quality,Q_80')
    const ossUrl = target.toString()
    const { data } = await axios.get(ossUrl)
    return data
  } catch (error) {
    console.error(error)
    return undefined
  }
}