import {Component, OnInit, ViewChild} from '@angular/core';
import {NavigationLink, NavigationLinkListComponent} from "../../navigation-link-list/navigation-link-list.component";
import {
  BasicScheduleEntityInfo, ScheduleService,
  TaskEntityInfo,
  TaskgroupEntityInfo,
  TaskgroupService,
  TaskService, TaskShortInfo
} from "../../../api";
import {ActivatedRoute, Router} from "@angular/router";
import {CalendarDateFormatter, CalendarEvent, CalendarView} from "angular-calendar";
import { Subject } from 'rxjs';
import {CalendarDatePipe} from "angular-calendar/modules/common/calendar-date/calendar-date.pipe";
import {BasicSchedulerComponent} from "../basic-scheduler/basic-scheduler.component";
import * as events from "events";
import { EventColor } from 'calendar-utils';

const colors: Record<string, EventColor> = {
  red: {
    primary: '#ad2121',
    secondary: '#FAE3E3',
  },
  blue: {
    primary: '#1e90ff',
    secondary: '#D1E8FF',
  },
  yellow: {
    primary: '#e3bc08',
    secondary: '#FDF1BA',
  },
};
@Component({
  selector: 'app-scheduler',
  templateUrl: './scheduler.component.html',
  styleUrls: ['./scheduler.component.css']
})
export class SchedulerComponent implements OnInit{
  defaultNavigationLinkPath: NavigationLink[] = [
    {
      linkText: "Dashboard",
      routerLink: ['/']
    },
    {
      linkText: "Taskgroups",
      routerLink: ["/taskgroups"]
    }
  ]
  taskgroups: TaskgroupEntityInfo[] = []
  taskgroup: TaskgroupEntityInfo | undefined
  taskgroupPath: TaskgroupEntityInfo[] = []
  taskgroupID: number = -1;
  scheduleID: number = -1;
  @ViewChild('navLinkList') navLinkListComponent: NavigationLinkListComponent | undefined

  task: TaskEntityInfo | undefined
  scheduleStrategy: number = 1


  /**************************************************/
  //Calendar-Stuff
  /**************************************************/
  view: CalendarView = CalendarView.Week;
  viewDate = new Date();
  daysInWeek = 7;
  refresh: Subject<void> = new Subject<void>()
  events: CalendarEvent[] = []

  @ViewChild('basicScheduler') basicScheduler: BasicSchedulerComponent | undefined

  constructor(private activatedRoute: ActivatedRoute,
              private taskgroupService: TaskgroupService,
              private taskService: TaskService,
              private scheduleService: ScheduleService,
              private router: Router) {
  }

  ngOnInit(): void {
    this.activatedRoute.paramMap.subscribe(params => {
      if (params.has('taskgroupID')) {
        this.taskgroupID = Number(params.get('taskgroupID'));
        this.taskgroupService.taskgroupsTaskgroupIDGet(this.taskgroupID).subscribe({
          next: resp => {
            this.taskgroups = resp.children
            this.taskgroupPath = resp.ancestors
            this.taskgroup = resp.taskgroupInfo;
            this.initializeNavigationLinkList()
          }
        })
      }

      if(params.has('taskID')) {
        this.taskService.tasksTaskIDGet(Number(params.get('taskID'))).subscribe({
          next: resp => {
            this.task = resp;
            this.initializeNavigationLinkList()
            this.fetschSchedules();
          }
        })
      }

      if(params.has('scheduleID')) {
        this.scheduleID = Number(params.get('scheduleID'));
      }
    });
  }

  initializeNavigationLinkList() {
    if(this.taskgroup != undefined && this.task != undefined) {
      this.navLinkListComponent!.addNavigationLink(this.taskgroup!.taskgroupName, ['/taskgroups', this.taskgroup!.taskgroupID.toString()])
      this.taskgroupPath.forEach(taskgroupEntity => {
        this.navLinkListComponent!.addNavigationLink(taskgroupEntity.taskgroupName, ['/taskgroups', taskgroupEntity.taskgroupID.toString()]);
      })
      this.navLinkListComponent!.addNavigationLink(this.task!.taskName, ['/taskgroups', this.taskgroup!.taskgroupID.toString(), 'tasks', this.task.taskID.toString()]);
      this.navLinkListComponent!.addNavigationLink('Schedule', [this.taskgroup!.taskgroupID.toString(), 'tasks', this.task.taskID.toString(), 'schedule'])
    }
  }

  protected readonly CalendarView = CalendarView;

  timeClick(clickedDate: Date) {
    if(this.basicScheduler != undefined) {
      this.basicScheduler.setDate(clickedDate)
    }
  }

  onBasicSchedule(scheduleInfo: BasicScheduleEntityInfo) {
    this.events.push({
      start: new Date(scheduleInfo.scheduleDate),
      title: this.task!.taskName,
      color: colors['red'],
      allDay: true
    })
    this.refresh.next();
  }

  fetschSchedules() {
    this.scheduleService.schedulesGet().subscribe({
      next: resp => {
        resp.forEach(schedule => {
          let color: EventColor = colors['red']
          if(schedule.scheduleID === this.scheduleID) {
            color = colors['yellow']
          }

          if(schedule.scheduleType === 'BASIC') {
            this.events.push({
              start: new Date(schedule.schedule.scheduleDate),
              title: this.computeTaskPath(schedule.taskgroupPath, schedule.task),
              color: color,
              allDay: true,
            })
          }
        })
        this.refresh.next();
      }
    })
  }

  eventClicked({ event }: { event: CalendarEvent }): void {
    this.router.navigateByUrl("/taskgroups/" + this.taskgroupID.toString() + "/tasks/" + this.task!.taskID )
  }

  computeTaskPath(taskgroupPath: TaskgroupEntityInfo[], task: TaskShortInfo | TaskEntityInfo) {
    let result = "";
    taskgroupPath.forEach(taskgroupPathPart => {
      result += taskgroupPathPart.taskgroupName + "/"
    });
    result += task!.taskName
    return result;
  }

}