import { Component } from '@angular/core';
import {
  BackendService,
  ScrumTask,
  ScrumUserstory,
  ScrumStatus,
  ScrumCategory,
  ScrumSprint,
} from '../../services/backend.service';
import { NgbModal } from '@ng-bootstrap/ng-bootstrap';
import { TableComponentBase } from '../../services/table-component.base';
import { getNumberForPriority } from '../../services/sorting.service';
import { UserstoryFormComponent } from '../userstory-form/userstory-form.component';
import { ActivatedRoute } from '@angular/router';
import { SprintFormComponent } from '../sprint-form/sprint-form.component';


@Component({
  selector: 'app-backlog',
  templateUrl: './backlog.component.html',
  styleUrls: ['./backlog.component.css'],
})
export class BacklogComponent extends TableComponentBase<
  ScrumUserstory
> {
  public tasks: ScrumTask[] = [];
  public filterPriority: string | null = null;
  public status: ScrumStatus[] = [];
  public categories: ScrumCategory[] = [];
  public sprints: ScrumSprint[] = [];

  public backlog: ScrumUserstory[] = [];
  public choosen: ScrumUserstory[] = [];

  constructor(
    private backendService: BackendService,
    private modalService: NgbModal,
    private route: ActivatedRoute,
  ) {
    super();
    backendService.getSprints().subscribe((response) => {
      if (response.status > 399) {
        alert('Fehler');
      } else {
        this.sprints.push(...response.body);
      }
    });
    backendService.getUserstories().subscribe((response) => {
      if (response.status > 399) {
        alert('Fehler');
      } else {
        this.backlog = response.body.filter(u => u.sprintid == null);
        this.choosen = response.body.filter(u => u.sprintid == this.currentSprint.id);
      }
    });
    backendService.getTasks().subscribe((response) => {
      if (response.status > 399) {
        alert('Fehler');
      } else {
        this.tasks.push(...response.body);
      }
    });
    backendService.getAllStatus().subscribe((response) => {
      if (response.status > 399) {
        alert('Fehler');
      } else {
        this.status.push(...response.body);
      }
    });
    backendService.getCategories().subscribe((response) => {
      if (response.status > 399) {
        alert('Fehler');
      } else {
        this.categories.push(...response.body);
      }
    });
  }

  public deleteUserstory(userstory: ScrumUserstory) {
    this.backendService.deleteUserstory(userstory).subscribe((response) => {
      if (response.status > 399) {
        alert('Fehler');
      }
    });
    const index = this.items.indexOf(userstory);
    if (index !== -1) {
      this.items.splice(index, 1);
    }
  }

  public openUserstoryForm(editUserstory?: ScrumUserstory) {
    const modalRef = this.modalService.open(UserstoryFormComponent, {
      backdrop: 'static',
      keyboard: true,
      size: 'lg'
    });
    if (editUserstory === null) {
      modalRef.result.then((result) => {
        this.items.push(result);
      });
    }
    modalRef.componentInstance.userstory = editUserstory;
  }

  public getNumberOfTasks(userstory: ScrumUserstory) {
    return this.tasks.filter((t) => t.userstoryid === userstory.id).length;
  }

  getCategoryTitleById(id) {
    var category = this.categories.find((x) => x.id === id);
    if (!category) {
      return 'N/A';
    }
    return category.title;
  }

  // Sprint-Backlog

  public addToSprintBacklog(userstory: ScrumUserstory) {
    this.choosen.push(userstory);
    const index = this.backlog.indexOf(userstory);
    this.backlog.splice(index, 1);
    userstory.sprintid = this.currentSprint.id;
    this.backendService.putUserstory(userstory).subscribe((response) => {
      if (response.status > 399) {
        alert('Fehler');
      }
    });
  }

  public deleteFromSprintBacklog(userstory: ScrumUserstory){
    const index = this.choosen.indexOf(userstory);
    this.choosen.splice(index, 1);
    this.backlog.push(userstory)
    userstory.sprintid = null;
    this.backendService.putUserstory(userstory).subscribe((response) => {
      if (response.status > 399) {
        alert('Fehler');
      }
    });
  }

  public get currentSprint(): ScrumSprint {
    const now = Date.now();
    return this.sprints.find(s => Date.parse(s.startDate) < now && Date.parse(s.endDate) > now);
  }

  public openSprintForm(editSprint?: ScrumSprint) {
    const modalRef = this.modalService.open(SprintFormComponent, {
      backdrop: 'static',
      keyboard: true,
    });
    if (editSprint === null) {
      modalRef.result.then(result => {
        this.items.push(result);
      });
    }
    modalRef.componentInstance.sprint = editSprint;
  }
}