import { Component, OnInit } from '@angular/core';
import { Inject } from '@angular/core';
import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material/dialog';
import { DataService } from '../data.service';
import {
  MatSnackBar,
  MatSnackBarHorizontalPosition,
  MatSnackBarVerticalPosition,
} from '@angular/material/snack-bar';

@Component({
  selector: 'app-implementer-dialog',
  templateUrl: './implementer-dialog.component.html',
  styleUrls: ['./implementer-dialog.component.css']
})
export class ImplementerDialogComponent implements OnInit {


  public possibleImplementers: any[] = [
    {value: '-1', viewValue: 'default'}
 ];
 public selectedValue : any = this.possibleImplementers[0].value;
 public progress : number = 0;
 public diasbled : boolean = false;
 public bdiasbled : boolean = false;
 public horizontalPosition: MatSnackBarHorizontalPosition = 'end';
 public verticalPosition: MatSnackBarVerticalPosition = 'bottom';
 public labels: string[] = [];

 private implementers : any[];


 /**
  * The constructor injects required Dependencies and sets default values for logic and ui
  * @param dialogRef MatDialog Reference from Angular
  * @param data contains an array of Changes which should be sent to the backend for a status transition
  * @param dataService injects the dataService for data management and backend communication
  */
 constructor(private dialogRef: MatDialogRef<ImplementerDialogComponent>, @Inject(MAT_DIALOG_DATA) public data: any,private dataService: DataService, private _snackBar: MatSnackBar) {
   this.progress = 0;
   this.bdiasbled = true;
   this.diasbled = false;
   this.selectedValue = -1;
   this.possibleImplementers = [];
   this.labels = [];
   if(this.dataService.selectedLanguage == 'DE'){
    this.labels.push("Implementer Eintragen");
    this.labels.push("Implementer auswählen");
    this.labels.push("Abbrechen");
    this.labels.push("Bestätigen");
   }else{
    this.labels.push("Enter Implementer");
    this.labels.push("Select Implementer");
    this.labels.push("Cancel");
    this.labels.push("Confirm");
   }
 }

/**
* The function ngOnInit checks in which actual State the selected changes are, then it provides a list that contains which statuses can be switched to in the current state
*/
 ngOnInit(): void {
  console.log(this.data.changes[0]);
  this.dataService.fetchImplementers(this.data.changes[0]).then((res: any)=>{
    this.implementers = res;
    console.log(this.implementers);
    this.possibleImplementers = [];
    if(this.implementers.length>0){
      for (const implementer of this.implementers) {
        this.possibleImplementers.push({value: implementer.loginId, viewValue: implementer.memberName});
      }
    }else{
      this.dialogRef.close();
    }
  }).catch((error)=>{

  });

  // MOCK:
//   this.implementers = [{name: "Manuel Tauber", loginId: "MT01"}, {name: "Julius Sula", loginId: "MT02"}, {name: "Said Gedik", loginId: "MT03"}];
//   console.log(this.implementers);
//   this.possibleImplementers = [];
//   if(this.implementers.length>0){
//     for (const implementer of this.implementers) {
//       this.possibleImplementers.push({value: implementer.loginId, viewValue: implementer.name});
//     }
//   }else{
//     this.dialogRef.close();
//   }
  }

 /**
  * The function enableButton is triggered by the selction event of a possible state by the user it anebles the execution button
  */
 enableButton():void{
   this.bdiasbled = false;
 }

 /**
  * The function updateState uses the dataService to execute a status transition on the backend. It sends the Changes to the backend one-by-one and calculates the percent-progress value for the progress bar.
  */
 updateImplementer(): void{
   let counter : number = 0;
   if(this.selectedValue != -1){
     for (let change of this.data.changes){
       this.dataService.updateImplementerPerChange({resourceId: change.pkgId, loginId: this.selectedValue}).then((res: any)=>{
         this.diasbled = true;
         this.bdiasbled = true;
         console.log(res);
         if(res.status == 200){
           counter++;
           this.progress = (counter/this.data.changes.length)*100;
         }
         if(res.status == 500){
          let msg;
          let action;
          if(this.dataService.selectedLanguage == 'DE'){
            msg = 'Implementer Eintragung fehlgeschlagen';
            action ='Schließen';
          }else{
            msg = 'Implementer Update failed';
            action ='close';
          }
           this._snackBar.open(msg, action, {
             horizontalPosition: this.horizontalPosition,
             verticalPosition: this.verticalPosition,
             panelClass: ['mat-primary']
           });
           this.dialogRef.close();
           //this.dialogRef.close();
           //counter++;
           //this.progress = (counter/this.data.changes.length)*100;
         }

         if(this.progress == 100){
           this.diasbled = false;
           this.bdiasbled = true;
           let msg;
           let action;
           if(this.dataService.selectedLanguage == 'DE'){
            msg = 'Implementer Eintragung erfolgreich';
            action ='Schließen';
          }else{
            msg = 'Implementer Update sucessful';
            action ='close';
          }
           this._snackBar.open(msg, action, {
             horizontalPosition: this.horizontalPosition,
             verticalPosition: this.verticalPosition,
             duration: 5000,
           });
           this.dialogRef.close();
         }
       });
     }
   }
 }

}