import { Component, OnInit, Inject } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { MatDialog, MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';
import { MatSnackBar, MatSnackBarConfig } from '@angular/material/snack-bar';



@Component({
  selector: 'app-uploading-cad',
  templateUrl: './uploading-cad.component.html',
  styleUrls: ['./uploading-cad.component.scss']
})
export class UploadingCADComponent implements OnInit {

  constructor(private http:HttpClient,public dialog: MatDialog,public snackBar: MatSnackBar) { }

  ngOnInit(): void {
    this.companyId = sessionStorage.getItem('companyId')
    this.getAllCAD()
  }

  displayedColumns: string[] = ['checked', 'name', 'time', 'state','size'];

  companyId:any; //单位编号
  CADList:any=[]; //所有CAD图
  selectCAD:any = []; //选中的CAD图

  //获取所有CAD图
  getAllCAD () {
    this.http.get('/api/CompanyAccount/CadData').subscribe(data=>{
      this.CADList = data
      this.selectCAD = []
      this.CADList.forEach(element => {
        element.loading = false
        element.suffix = element.cadUrl.substring(element.cadUrl.lastIndexOf("."),element.cadUrl.length); //图名后缀
        element.fileLength = (element.fileLength/1024/1024).toFixed(2)});
    })
  }

  //change CAD图checked
  checkedCAD (e,element) {
    if (e.checked) {
      this.selectCAD.push(element)
    } else {
      this.selectCAD.splice(this.selectCAD.findIndex(item => item.id === element.id), 1)}
  }

  //打开上传文件窗口
  openReadFile() {
    let dialogRef = this.dialog.open(readFile);
    dialogRef.afterClosed().subscribe(data=>{
      if (data) {
        this.file = data.file
        this.fileName = data.name
        this.startUploading()} //开始上传
    });   
  }

  //打开编辑文件窗口
  editFile () {
    if (this.selectCAD.length===1) {
      let data = this.selectCAD[0]
      let dialogRef = this.dialog.open(editFile,{data});
      dialogRef.afterClosed().subscribe(data=>{
        if (data) {this.getAllCAD()}
      }); 
    } else if (this.selectCAD.length>1) {
      const config = new MatSnackBarConfig();
      config.verticalPosition = 'top';
      config.duration = 3000
      this.snackBar.open('不支持批量编辑','确定',config);
    }else if (!this.selectCAD.length) {
      const config = new MatSnackBarConfig();
      config.verticalPosition = 'top';
      config.duration = 3000
      this.snackBar.open('请选择CAD图纸','确定',config);
    }
  }

  //删除CAD图
  deleteCAD () {
    if (this.selectCAD.length) {
      let isDelete = confirm('您确定要删除吗')
      let arr = []
      if (isDelete) {
        this.selectCAD.forEach( async (element,index) => {
          let result = await new Promise((result,reject)=>{
            this.http.delete(`/api/CompanyAccount/CadData/${element.id}`).subscribe(data=>{result(index)})
            this.http.delete(`/api/Objects/PlanPlatform/${element.cadUrl}`).subscribe(data=>{})
          })
        arr.push(result)
        if (arr.length == this.selectCAD.length) {
          this.getAllCAD()
          const config = new MatSnackBarConfig();
          config.verticalPosition = 'top';
          config.duration = 3000
          this.snackBar.open('删除CAD图纸成功','确定',config);}
        });
      }
    } else {
      const config = new MatSnackBarConfig();
      config.verticalPosition = 'top';
      config.duration = 3000
      this.snackBar.open('请选择CAD图纸','确定',config);
    }
  }





  //上传文件↓
  file:any; //上传的文件
  fileName:any; //上传文件name
  uploadisLoading:boolean = false; //进度条loading加载
  uploadProgress:number=0; //进度条进度  
  objectName:any; //上传对象名
  uploadId:any; //上传分块上传事件编号

  //上传文件
  startUploading () {
    let file = this.file || null //获取上传的文件
    let fileSize = file.size || null //上传文件的总大小
    let shardSize = 5 * 1024 * 1024 //5MB一个分片

    if (file && fileSize<=shardSize) { //上传文件<=5MB时
      let formData = new FormData()
      formData.append("file",file)
      this.http.post(`/api/Objects/PlanPlatform/${this.companyId}/CAD`,formData).subscribe((data:any)=>{
        this.objectName = data.objectName
        this.addCADData()
      })
    } else if (file && fileSize>shardSize) { //上传文件>5MB时,分块上传
      let data = {filename: file.name}
      this.uploadisLoading = true
      this.http.post(`/api/NewMultipartUpload/PlanPlatform/${this.companyId}/CAD`,{},{params:data}).subscribe((data:any)=>{ //初始化分段上传
        this.objectName = data.objectName
        this.uploadId = data.uploadId
        this.subsectionUploading()
      })
    }

  }

  PartNumberETag:any=[]; //每次返回需要保存的信息
  //开始分段上传
  async subsectionUploading () {
    let file = this.file || null //获取上传的文件
    let fileSize = file.size || null //上传文件的总大小
    let shardSize = 5 * 1024 * 1024 //5MB一个分片
    let allSlice = Math.ceil(fileSize / shardSize) //总文件/5MB===共分多少段

    for (let i = 0;i < allSlice;i++) { //循环分段上传
        let start = i * shardSize //切割文件开始位置
        let end = Math.min(fileSize, start + shardSize); //切割文件结束位置
        let formData = new FormData()
        formData.append("file",file.slice(start, end))

        //同步写法实现异步调用
        let result = await new Promise((resolve, reject) => {
          // await 需要后面返回一个 promise 对象
          this.http.post(`/api/MultipartUpload/PlanPlatform/${this.objectName}?uploadId=${this.uploadId}&partNumber=${i+1}`,formData).subscribe((data:any)=>{
              let msg = {
                "partNumber":data.partNumber || null,
                "eTag": data.eTag || null}
              resolve(msg) // 调用 promise 内置方法处理成功
          })
        });
        this.PartNumberETag.push(result)
        this.uploadProgress = Number((i/allSlice).toFixed(2))*100

        if (this.PartNumberETag.length === allSlice) {
          this.uploadProgress = 100
          this.endUploading()}
    }//for循环

  }

  //完成分块上传
  endUploading () {
    let data = this.PartNumberETag
    let paramsData = {uploadId:this.uploadId}
    this.http.post(`/api/CompleteMultipartUpload/PlanPlatform/${this.objectName}`,data,{params:paramsData}).subscribe(data=>{
      this.addCADData()
      this.uploadProgress = 0;
      this.uploadisLoading = false
      this.PartNumberETag =[] //清空保存返回的信息
    })
  }

  //取消分块上传
  cancel () {
    this.http.delete(`/api/MultipartUpload/PlanPlatform/${this.objectName}?uploadId=${this.uploadId}`).subscribe(data=>{
      this.uploadProgress = 0;
      this.uploadisLoading= false
      this.PartNumberETag =[] //清空保存返回的信息
      const config = new MatSnackBarConfig();
      config.verticalPosition = 'top';
      config.duration = 3000
      this.snackBar.open('取消上传成功!','确定',config);
    })
  }

  //上传成功创建CAD
  addCADData () {
    let data = {
      name: this.fileName,
      cadUrl: this.objectName,
      fileLength: this.file.size,
      creationTime: new Date(),
      companyId: this.companyId
    }
    this.http.post('/api/CompanyAccount/CadData',data).subscribe(data=>{
      this.getAllCAD()
    })
  }





  //下载↓
  selectDownloadFile:any; //选择下载的文件
  download:any; //下载文件元数据
  downloadisLoading:boolean = false; //进度条loading加载
  downloadProgress:number=0; //进度条进度 

  //读取下载文件信息
  readFile () {
    if (this.selectCAD.length===1) {
      this.selectDownloadFile = this.selectCAD[0]
      this.http.get('/api/ObjectMetadata/PlanPlatform/'+this.selectDownloadFile.cadUrl).subscribe(data=>{
        this.download = data
        this.downloadFile()
      })
    } else if (this.selectCAD.length>1) {
      const config = new MatSnackBarConfig();
      config.verticalPosition = 'top';
      config.duration = 3000
      this.snackBar.open('暂时不支持批量下载','确定',config)
    } else if (!this.selectCAD.length) {
      const config = new MatSnackBarConfig();
      config.verticalPosition = 'top';
      config.duration = 3000
      this.snackBar.open('请选择CAD图纸','确定',config);
    }
  }

  //初始化下载
  downloadFile () {
    let file = this.download
    let fileSize = file.fileLength//下载文件的总大小
    let shardSize = 10 * 1024 * 1024 //文件大小是否大于10MB

    if (file && fileSize<=shardSize) { //<=10MB时直接下载
      this.downloadisLoading = true
      this.setFileLoading()
      this.http.get(`/api/Objects/PlanPlatform/${file.objectName}`,{responseType: 'blob'},).subscribe(data=>{

        let url = window.URL.createObjectURL(new Blob([data])); //createObjectURL创建一个下载Blob的url地址
        let link = document.createElement("a");
        link.style.display = "none";
        link.href = url;
        link.setAttribute("download", this.selectDownloadFile.name+this.selectDownloadFile.suffix);
        document.body.appendChild(link);
        link.click();
        this.downloadisLoading = false
        this.setFileLoading()
      })
    } else if (file && fileSize>shardSize) { //>10MB时分块下载
      this.blockingDownload() //分段下载
      this.downloadisLoading = true
      this.setFileLoading()
    }

  }

  //分段下载并合并
  async blockingDownload () {
    let file = this.download
    let fileSize = file.fileLength //下载文件的总大小
    let shardSize = 3 * 1024 * 1024 //3MB一个分片
    let allSlice = Math.ceil(fileSize / shardSize) //总文件/3MB===共分多少段
    let allFile:any = [] //所有的file分段

    for (let i=0;i<allSlice;i++) {
      let start = i * shardSize //每次下载文件开始位置
      let end = Math.min(fileSize, start + shardSize-1); //每次下载文件结束为止

      let result =  await new Promise ((result,reject)=>{
        this.http.get(`/api/Objects/PlanPlatform/${file.objectName}`,{headers:{'range':`bytes= ${start}-${end}`},responseType:'blob'}).subscribe(data=>{
          result(data) }) 
      })
      allFile.push(result)
      this.downloadProgress = Number((i/allSlice).toFixed(2))*100

      if (allFile.length === allSlice) { //合并文件输出给浏览器
        let url = window.URL.createObjectURL(new Blob(allFile)); //createObjectURL创建一个下载Blob的url地址
        let link = document.createElement("a");
        link.style.display = "none";
        link.href = url;
        link.setAttribute("download", this.selectDownloadFile.name+this.selectDownloadFile.suffix);
        document.body.appendChild(link);
        link.click();
        this.downloadProgress = 0
        this.downloadisLoading = false
        this.setFileLoading()
      }

    } //for循环

  }

  //取消分块下载
  cancelDowload () {

  }

  //封装函数设置当前文件loading状态
  setFileLoading () {
    let id = this.selectDownloadFile.id
    this.CADList.forEach(element => {
      if (element.id === id) { element.loading = !element.loading }
    });
  }





}



//创建文件弹窗组件
@Component({
  selector: 'app-readFile',
  templateUrl: './readFile.html',
  styleUrls: ['./uploading-cad.component.scss']
})
export class readFile {

  constructor(private http:HttpClient,public dialog: MatDialog,public dialogRef: MatDialogRef<readFile>,
    @Inject(MAT_DIALOG_DATA) public data,public snackBar: MatSnackBar) { }

  ngOnInit(): void {

  }

  file:any; //上传的文件

  //input file 选择文件
  selectFile (e) {
    this.file = e.target.files[0] || null //上传的文件
  }

  //提交表单上传
  onSubmit (e) {
    if (this.file) {
      let data = {
        name:e.name,
        file: this.file}
      this.dialogRef.close(data);
    } else {
      const config = new MatSnackBarConfig();
      config.verticalPosition = 'top';
      config.duration = 3000
      this.snackBar.open('请选择CAD图纸','确定',config);
    }
  }



}



//编辑文件弹窗组件
@Component({
  selector: 'app-editFile',
  templateUrl: './editFile.html',
  styleUrls: ['./uploading-cad.component.scss']
})
export class editFile {

  constructor(private http:HttpClient,public dialog: MatDialog,public dialogRef: MatDialogRef<editFile>,
    @Inject(MAT_DIALOG_DATA) public data) { }

  ngOnInit(): void {
    this.CADname = this.data.name
  }

  CADname:any; //name

  //提交表单保存
  onSubmit (e) {
    let headers = new HttpHeaders({'Content-Type': 'text/json'});
    let options = {headers};
    this.http.put(`/api/CompanyAccount/CadData/${this.data.id}`,JSON.stringify(e.name),options).subscribe(data=>{
      this.dialogRef.close('success');
    })
  }



}