import { Component, OnInit, Input } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
import { Location } from '@angular/common';

import { Hero }         from '../hero';
import { HeroService }  from '../providers/hero.service';

/** Component for the management of details of the Heroes. */
@Component({
  selector: 'app-hero-detail',
  templateUrl: './hero-detail.component.html',
  styleUrls: [ './hero-detail.component.css' ]
})
export class HeroDetailComponent implements OnInit {

  /** Hero selected */
  @Input() hero: Hero;

  constructor(
    private route: ActivatedRoute,
    private heroService: HeroService,
    private location: Location
  ) {}

  /** When webpage is loaded, gets hero id from the URL */
  ngOnInit(): void {
    this.getHero();
  }

  /** Loads specific Hero based on URL id */
  getHero(): void {
    const id = +this.route.snapshot.paramMap.get('id');
    this.heroService.getHero(id)
      .subscribe(hero => this.hero = hero);
  }

  /** Go back last web page */
  goBack(): void {
    this.location.back();
  }

  /** Uploads specific Hero data based on URL id */
 save(): void {
    this.heroService.updateHero(this.hero)
      .subscribe(() => this.goBack());
  }
}