import {Component, ViewChild} from '@angular/core';
import {NavigationLink, NavigationLinkListComponent} from "../../navigation-link-list/navigation-link-list.component";
import {
    AdvancedScheduleInfo,
    BasicScheduleInfo,
    ScheduleInfo,
    ScheduleService,
    TaskEntityInfo,
    TaskgroupEntityInfo,
    TaskOverviewInfo, TaskShortInfo
} from "../../../api";
import {Subject} from "rxjs";
import {CalendarEvent, CalendarEventAction, CalendarEventTimesChangedEvent, CalendarView} from "angular-calendar";
import {TaskOverviewData} from "../../dashboard/taskgroup-overview/taskgroup-overview.component";
import {EventColor} from "calendar-utils";
import * as moment from "moment";
import {Router} from "@angular/router";

const colors: Record<string, EventColor> = {
  red: {
    primary: '#ad2121',
    secondary: '#FAE3E3',
  },
  blue: {
    primary: '#1e90ff',
    secondary: '#D1E8FF',
  },
  yellow: {
    primary: '#e3bc08',
    secondary: '#FDF1BA',
  },
};
@Component({
  selector: 'app-draggable-scheduler',
  templateUrl: './draggable-scheduler.component.html',
  styleUrls: ['./draggable-scheduler.component.css'],
  styles: [
        `
      h3 {
        margin: 0 0 10px;
      }

      pre {
        background-color: #f5f5f5;
        padding: 15px;
      }
    `,
  ],
})
export class DraggableSchedulerComponent {
  defaultNavigationLinkPath: NavigationLink[] = [
    {
      linkText: "Dashboard",
      routerLink: ['/']
    },
    {
      linkText: "Taskgroups",
      routerLink: ["/taskgroups"]
    }
  ]
  taskgroups: TaskgroupEntityInfo[] = []
  taskgroup: TaskgroupEntityInfo | undefined
  taskgroupPath: TaskgroupEntityInfo[] = []
  taskgroupID: number = -1;
  scheduleID: number = -1;
  editedSchedule: ScheduleInfo | undefined
  @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[] = []

  actions: CalendarEventAction[] = [
      {
          label: '<i class="fas fa-fw fa-pencil-alt"></i>',
          a11yLabel: 'Edit',
          onClick: ({ event }: { event: CalendarEvent }): void => {
            this.eventClicked('Edit', event)
          },
      },
      {
          label: '<i class="fas fa-fw fa-trash-alt"></i>',
          a11yLabel: 'Delete',
          onClick: ({ event }: { event: CalendarEvent }): void => {
              this.eventClicked('Delete', event);
          },
      },
  ]

  tasks: CalendarEvent[] = []
  selectedTaskgroupID: number | undefined

  constructor(private scheduleService: ScheduleService,
              private router: Router) {
  }

  ngOnInit() {
    this.scheduleService.schedulesGet().subscribe({
        next: resp => {
          resp.forEach(schedule => {
            if(schedule.scheduleType == 'BASIC') {
              const basicSchedule = schedule as BasicScheduleInfo
                this.events.push({
                    title: this.computeTaskPath(schedule.taskgroupPath, schedule.task),
                    color: colors['red'],
                    start: new Date(basicSchedule.scheduleDate),
                    actions: this.actions,
                    allDay: true,
                    draggable: true,
                    resizable: {
                        beforeStart: true,
                        afterEnd: true
                    },
                    meta: {
                        taskID: schedule.task.taskID,
                        scheduleID: schedule.scheduleID,
                        taskgroupID: schedule.taskgroupPath[0].taskgroupID
                    },

                })
            } else {
                const advancedSchedule = schedule as AdvancedScheduleInfo
                this.events.push({
                    title:  this.computeTaskPath(schedule.taskgroupPath, schedule.task),
                    color: colors['red'],
                    cssClass: 'test',
                    start: new Date(advancedSchedule.scheduleStartTime),
                    end: new Date(advancedSchedule.scheduleStopTime),
                    actions: this.actions,
                    draggable: true,
                    resizable: {
                        beforeStart: true,
                        afterEnd: true
                    },
                    meta: {
                        taskID: schedule.task.taskID,
                        scheduleID: schedule.scheduleID,
                        taskgroupID: schedule.taskgroupPath[0].taskgroupID
                    },
                })
            }
          });
          console.log(this.events)
          this.refresh.next();
        }
    })
  }

  onSelectTaskgroup(taskOverviewData: TaskOverviewData) {
    this.tasks = [];
    taskOverviewData.tasks.forEach(task => {
      this.tasks.push({
        title: task.taskName,
        color: colors['yellow'],
        start: new Date(),
        draggable: true,
        cssClass: 'test',
        resizable: {
          beforeStart: true,
          afterEnd: true
        },
        meta: {
          taskID: task.taskID,
          scheduleID: undefined,
          taskgroupID: taskOverviewData.taskgroupID
        },
        actions: this.actions
      })
    })
    this.selectedTaskgroupID = taskOverviewData.taskgroupID;
  }


  externalDrop(event: CalendarEvent) {
    if (this.tasks.indexOf(event) === -1) {
      this.events = this.events.filter((iEvent) => iEvent !== event);
      this.tasks.push(event);
    }
  }

  eventDropped({
                 event,
                 newStart,
                 newEnd,
                 allDay,
               }: CalendarEventTimesChangedEvent): void {
    const externalIndex = this.tasks.indexOf(event);
    if (typeof allDay !== 'undefined') {
      event.allDay = allDay;
    }
    if (externalIndex > -1) {
      this.tasks.splice(externalIndex, 1);
      this.events.push(event);
    }

    event.start = newStart;
    if (newEnd) {
      event.end = newEnd;
    }
    this.events = [...this.events];

    if(externalIndex > -1) {
      //Create new schedule as a new event was dropped
      if(event.allDay) {
        this.scheduleService.schedulesTaskIDBasicPut(event.meta.taskID,{
          scheduleDate: moment(event.start).format('YYYY-MM-DDTHH:mm:ss.SSSZ')
        }).subscribe({
            next: resp => {
              event.meta.scheduleID = resp.scheduleID;
              event.color = colors['red'];
              event.title = this.computeTaskPath(resp.taskgroupPath, resp.task)
            }
        })
      } else {
        console.log("Start: " + event.start);
        console.log("End: " + event.end);
        if(event.end == undefined) {
          event.end = moment(event.start).add(30, 'm').toDate()
        }
        this.scheduleService.schedulesTaskIDAdvancedPut(event.meta.taskID, {
            scheduleStartTime: moment(event.start).format('YYYY-MM-DDTHH:mm:ss.SSSZ'),
            scheduleStopTime: moment(event.end).format('YYYY-MM-DDTHH:mm:ss.SSSZ'),
        }).subscribe({
            next: resp => {
                event.meta.scheduleID = resp.scheduleID;
                event.color = colors['red'];
                event.title = this.computeTaskPath(resp.taskgroupPath, resp.task)
            }
        })
      }
    } else {
        if(event.allDay) {
            this.scheduleService.schedulesScheduleIDBasicPost(event.meta.scheduleID,{
                scheduleDate: moment(event.start).format('YYYY-MM-DDTHH:mm:ss.SSSZ')
            }).subscribe({
                next: resp => {
                    console.log("Updated")
                }
            })
        } else {
            this.scheduleService.schedulesScheduleIDAdvancedPost(event.meta.scheduleID, {
                scheduleStartTime: moment(event.start).format('YYYY-MM-DDTHH:mm:ss.SSSZ'),
                scheduleStopTime: moment(event.end).format('YYYY-MM-DDTHH:mm:ss.SSSZ'),
            }).subscribe({
                next: resp => {
                   console.log("Updated")
                }
            })
        }
    }
  }

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

    eventClicked(action: string, event: CalendarEvent): void {
        if(action == 'Click') {
            this.router.navigateByUrl("/taskgroups/" + event.meta.taskgroupID + "/tasks/" + event.meta.taskID);
        } else if(action == 'Edit') {
            this.router.navigateByUrl("/taskgroups/" + event.meta.taskgroupID + "/tasks/" + event.meta.taskID + "/schedule/" + event.meta.scheduleID);
        } else if(action == 'Delete') {
            this.scheduleService.schedulesScheduleIDDelete(event.meta.scheduleID).subscribe({
                next: resp => {
                    this.events = this.events.filter(calendarEvent => calendarEvent.meta.scheduleID !== event.meta.scheduleID);
                }
            })
        }

    }
}