import { Component, OnInit } from '@angular/core';
import { MessageService } from '../message.service';
import { CommercialPremiseService, PremiseService } from '../data-object-service';
import { CommercialPremise, Premise } from '../data-objects';
import { MatTableDataSource } from '@angular/material/table'

interface DN_CommercialPremise {
  commercialPremise: CommercialPremise
  premise: Premise
}

@Component({
  selector: 'app-my-commercial-units',
  templateUrl: './my-commercial-units.component.html',
  styleUrls: ['./my-commercial-units.component.css']
})
export class MyCommercialUnitsComponent implements OnInit {

  commercialPremises: CommercialPremise[]
  premises: Premise[]
  dnCommercialPremises: DN_CommercialPremise[] = []

  dataSource: MatTableDataSource<DN_CommercialPremise>
  displayedColumns: string[] = ["description", "premise", "area"]

  constructor(
    private commercialPremiseService: CommercialPremiseService, 
    private premiseService: PremiseService,
    private messageService: MessageService
  ) { }

  async getCommercialPremises(): Promise<void> {
    try {
      this.messageService.add("Trying to load commercialPremises")
      this.commercialPremises = await this.commercialPremiseService.getCommercialPremises()
      this.messageService.add("CommercialPremises loaded")
      this.messageService.add("Trying to load premises")
      this.premises = await this.premiseService.getPremises()
      this.messageService.add(`Premises loaded: ${ JSON.stringify(this.premises, undefined, 4) }`)

      const premisesDict = new Map<number, Premise>()
      for (let p of this.premises) {
        premisesDict.set(p.id, p)
      }
      for (let f of this.commercialPremises) {
        this.dnCommercialPremises.push({
          commercialPremise: f,
          premise: premisesDict.get(f.premise)
        })
      }


      this.dataSource = new MatTableDataSource<DN_CommercialPremise>(this.dnCommercialPremises)
    } catch (err) {
      this.messageService.add(JSON.stringify(err, undefined, 4))
    }
  }

  ngOnInit(): void {
    this.messageService.add("MyCommercialUnitsComponent.ngOnInit")
    this.getCommercialPremises()
  }

}