'use strict'
const axios = require('axios');
const fs = require('fs');
const url = "http://10.8.0.10:8081/group1/upload";
const dir = "/opt/crawl/whatsapp/whatsapp_wppconnect/sources/"



/**
 * base64数据流转化为 适合formdata的格式 
 **/
function base64ToBlob(base64, mime) {
    let raw;
    if(base64.indexOf(";base64,") > -1){ // 如果存在base64这个前缀的话
        const parts = base64.split(';base64,');
        const contentType = parts[0].split(':')[1];
        // console.log(parts[1]);
        raw = atob(parts[1]);
    }else{
        raw = atob(base64);
    }
    
    const rawLength = raw.length;
    const uInt8Array = new Uint8Array(rawLength);

    for (let i = 0; i < rawLength; ++i) {
        uInt8Array[i] = raw.charCodeAt(i);
    }
    return new Blob([uInt8Array], {type: mime});
}


/**
* 如果失败则下载到本地
**/
function saveToLocal(base64, mime){
    var file_name = "".concat(new Date()* 1000, "_".concat(mime.replace("/", ".")))
    file_name = dir + file_name;

    let videoData;
    if(base64.indexOf(";base64,") > -1){ // 如果存在base64这个前缀的话
        const parts = base64.split(';base64,');
        const contentType = parts[0].split(':')[1];
        videoData = Buffer.from(parts[1], 'base64');
    }else{
        videoData =  Buffer.from(base64, 'base64');
    }

    fs.writeFile(file_name, videoData, 'base64', (err) => {
        if (err) {
            console.error(err);
            console.error("视频保存失败: ", base64);
            return;
        }
        console.log('视频已保存为 ' + file_name);
    });

    return file_name;
}


async function upload_files(base64, mime, file_name){
    // 创建一个Blob对象
    const blob = base64ToBlob(base64, mime);
    // 创建FormData对象并添加文件
    const formData = new FormData();
    formData.append('file', blob, file_name); // 'image.png'是文件名

    const headers =  {
        'Content-Type': 'multipart/form-data'
    }
    
    // 这个包可以
    try{
        let res = await axios.post(url, formData, {
            headers:headers,
            timeout: 20000 // 设置超时时间
        })
        console.log("上传成功:", res["data"]);
//        return res["data"];
        return {media_data: res["data"], local_data: undefined};
    }catch(error){
        console.error('上传失败:', error);
        let result = saveToLocal(base64, mime);
        console.error("上传失败: 保存到本地 ", result);
        return {media_data: "error", local_data: result}
//        return "error";
    }
    
    // .then(response => console.log(response.data))
    // .catch(error => console.error('Error:', error));
}


module.exports = {
    upload_files,
    saveToLocal
}