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";
import { TabbarAndScoreService } from "src/app/service/tabbar-and-score.service";

@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,
    private tabbarService: TabbarAndScoreService
  ) {}

  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);
      });
      this.tabbarService.sendMessage("changeScore"); //通知服务改变分数
    });
  }

  //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");
      });
  }
}