import { Component, Inject, OnInit, ViewChild } from '@angular/core';
import { Page, BrowseTerm, Datasource, KeyValue, DsmConf, ProtocolParam, Api, ApiInsert } from '../common/is.model';
import { ISService } from '../common/is.service';
import { ActivatedRoute, Params } from '@angular/router';
import { MatDialog, MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';
import { MatTableDataSource } from '@angular/material/table';
import { MatSort } from '@angular/material/sort';
import { combineLatest } from 'rxjs';
import { Router } from '@angular/router';
import { PageEvent } from '@angular/material/paginator';
import { FormBuilder, FormControl, FormGroup, ValidatorFn, Validators } from '@angular/forms';
import { MatSelectChange } from '@angular/material/select';

@Component({
  selector: 'app-dsm-search',
  templateUrl: './dsm-search.component.html',
  styleUrls: ['./dsm.component.css']
})
export class DsmSearchComponent implements OnInit {
  searchText:string = '';
  browsableFields:KeyValue[] = [];

  constructor(public service: ISService, public route: ActivatedRoute, public router: Router, public dialog: MatDialog) {
  }

  ngOnInit() {
    this.service.dsmBrowsableFields((data: KeyValue[]) => this.browsableFields = data);
  }

  search() {
    this.router.navigate(['/dsm/results/0/50'], {
      queryParams: { value: this.searchText }
    });
  }

  browseField(field:string, label:string) {
      const dialogRef = this.dialog.open(DsmBrowseDialog, {
        data: { field: field, label: label },
        width: '80%'
      });
  }

}

@Component({
  selector: 'app-dsm-results',
  templateUrl: './dsm-results.component.html',
  styleUrls: ['./dsm.component.css']
})
export class DsmResultsComponent implements OnInit {
  filterText:string = '';
  results:Datasource[] = [];
  nResults:number = 0;
  currPage:number = 0;
  nPages:number = 0;
  pageSize:number = 0;
  field?:string;
  value:string = '';
  
  constructor(public service: ISService, public route: ActivatedRoute, public router: Router, public dialog: MatDialog) {
  }

  ngOnInit(): void {
    combineLatest([ this.route.params, this.route.queryParams ],
      (params: Params, queryParams: Params) => ({ params, queryParams })
    ).subscribe((res: { params: Params; queryParams: Params }) => {
      const { params, queryParams} = res;
      this.currPage = parseInt(params['page']);
      this.pageSize = parseInt(params['size']);
      this.field = queryParams['field'];
      this.value = queryParams['value'];
      this.reload();
    });  
  }

  reload() {
    if (this.field) {
      this.service.dsmSearchByField(this.field, this.value, this.currPage, this.pageSize, (page:Page<Datasource>) => {
        this.results = page.content;
        this.nResults = page.totalElements;
        this.nPages = page.totalPages;
      });
    } else {
      this.service.dsmSearch(this.value, this.currPage, this.pageSize, (page:Page<Datasource>) => {
        this.results = page.content;
        this.nResults = page.totalElements;
        this.nPages = page.totalPages;
      });
    }
  }

  changePage(event: PageEvent) {
    let path = '/dsm/results/' + event.pageIndex + '/' + event.pageSize;
    let qp = this.field ?  
      { field: this.field, value: this.value } : 
      { value: this.value };
    
    this.router.navigate([path], {
      queryParams: qp
    });
  }

  openAddApiDialog(dsId:string, dsName:string) {
    const dialogRef = this.dialog.open(DsmAddApiDialog, {
      data: { dsId: dsId, dsName: dsName },
      width: '80%'
    });

    dialogRef.afterClosed().subscribe(result => {
      if (result) this.reload();
    });
  }

}

@Component({
  selector: 'app-dsm-api',
  templateUrl: './dsm-api.component.html',
  styleUrls: ['./dsm.component.css']
})
export class DsmApiComponent {

}

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

  datasource: MatTableDataSource<BrowseTerm> = new MatTableDataSource<BrowseTerm>([]);
  colums: string[] = ['name', 'total'];
 
  @ViewChild(MatSort) sort: MatSort | undefined

  constructor(public dialogRef: MatDialogRef<DsmBrowseDialog>, @Inject(MAT_DIALOG_DATA) public data: any, public service: ISService) {
  } 

  ngOnInit(): void {
    this.service.dsmBrowse(this.data.field, (res:BrowseTerm[]) => this.datasource.data = res);
  }

  ngAfterViewInit() {
    if (this.sort) this.datasource.sort = this.sort;
  }

  applyFilter(event: Event) {
    const filterValue = (event.target as HTMLInputElement).value.trim().toLowerCase();
    this.datasource.filter = filterValue;
  }

  onNoClick(): void {
    this.dialogRef.close();
  }
}


@Component({
  selector: 'dsm-add-api-dialog',
  templateUrl: './dsm-add-api.dialog.html',
  styleUrls: ['./dsm.component.css']
})
export class DsmAddApiDialog {
  selectedProtocol:string = '';

  apiPrefix:string = '';
  paramPrefix:string = '__PARAM_';

  protocols:string[] = [];
  compatibilityLevels:string[] = [];
  contentDescTypes:string[] = [];

  protocolsMap:any = {};
  selProtParams:ProtocolParam[] = [];

  addApiForm:FormGroup = new FormGroup({
    apiIdSuffix: new FormControl('', [Validators.required]),
    compatibility : new FormControl('', [Validators.required]),
    contentdescription : new FormControl('', [Validators.required]),
    protocol : new FormControl('', [Validators.required]),
    baseurl : new FormControl('', [Validators.required]),
    metadataIdentifierPath : new FormControl('', [Validators.required])
  });

  constructor(public dialogRef: MatDialogRef<DsmAddApiDialog>,  @Inject(MAT_DIALOG_DATA) public data: any, public service: ISService) {
    this.apiPrefix = 'api_________::' + data.dsId + '::';
    this.service.dsmConf((conf:DsmConf) => {
      this.compatibilityLevels = conf.compatibilityLevels;
      this.contentDescTypes = conf.contentDescTypes;
      conf.protocols.forEach((p) => {
        this.protocols.push(p.id);
        this.protocolsMap[p.id] = p.params;
      }); 
    });
  }

  onChangeProtocol(e:MatSelectChange):void {
    this.selectedProtocol = e.value;

    Object.keys(this.addApiForm.controls).forEach(k => {
      if (k.startsWith(this.paramPrefix)) {
        this.addApiForm.removeControl(k);
      }
    });
  
    if (this.protocolsMap[e.value]) {
      this.selProtParams = this.protocolsMap[e.value];
      this.selProtParams.forEach(p => {
        let validations:ValidatorFn[] = [];
        if (!p.optional) { validations.push(Validators.required); }
        if (p.type == 'INT') { validations.push(Validators.pattern('^[0-9]*$')); }
        this.addApiForm.addControl(this.paramPrefix + p.name, new FormControl('', validations));
      });
    } else {
      this.selProtParams = [];
    }
  }

  onSubmit():void {
    let api:ApiInsert = {
      id: this.apiPrefix + this.addApiForm.get('apiIdSuffix')?.value,
      protocol: this.selectedProtocol,
      datasource: this.data.dsId,
      contentdescription: this.addApiForm.get('contentdescription')?.value,
      removable: true,
      compatibility: this.addApiForm.get('compatibility')?.value,
      metadataIdentifierPath: this.addApiForm.get('metadataIdentifierPath')?.value,
      baseurl: this.addApiForm.get('baseurl')?.value,
      apiParams : []
    };
    
    Object.keys(this.addApiForm.controls).forEach(k => {
      if (k.startsWith(this.paramPrefix)) {
        let val = this.addApiForm.get(k)?.value;
        if (val) {
          api.apiParams.push({
            param: k.substring(this.paramPrefix.length),
            value: (Array.isArray(val)) ? val.join() : val
          });
        }
      }
    });
    console.log(api);
    //this.service.dsmAddApi(api, (data: void) => this.dialogRef.close(1), this.metadataForm);
  }
  
  onNoClick(): void {
    this.dialogRef.close();
  }
}