import { Injectable } from '@angular/core';
import { CustomCalendarEvent, EventListStore } from 'src/app/models/agenda/AgendaEventList';
import { DateService } from '../date.service';

@Injectable({
  providedIn: 'root'
})
export class ListBoxService {

	constructor(
    	private dateService: DateService
	){}

	
	filterProfile(eventSource: EventListStore[] = [], profile: 'md' | 'pr' |  'all') {
		return eventSource.filter((e) => e.profile == profile)
	}

	getEventInsideRange(eventSource: EventListStore[], rangeStartDate, randEndDate) {
		return eventSource.filter((e)=> {
			if(new Date(rangeStartDate).getTime() <= new Date(e.startTime).getTime() &&
					new Date(randEndDate).getTime() >= new Date(e.endTime).getTime()) { 
				return true
			}
			return false
		})
	}

	filterSegment(eventSource: EventListStore[], segment): EventListStore[] {
		
		return eventSource.filter( data => data.calendarName == segment)
	}

	daysBetween(){ }

	list(eventSource: EventListStore[], profile: 'md' | 'pr' | 'all', rangeStartDate, randEndDate, {segment = 'Combinado', selectedDate= null}) {

		// // filter range
		// if(selectedDate) {
		// 	eventSource = eventSource.filter(data => 
		// 		data.startTime.toLocaleDateString('pt') >= new Date(rangeStartDate).toLocaleDateString('pt') && 
		// 		data.startTime.toLocaleDateString('pt') <= new Date(rangeStartDate).toLocaleDateString('pt')
		// 	)
		// }


		if(segment!='Combinado') {
			eventSource = this.filterSegment(eventSource, segment) 
		}
    
		// if(profile != 'all') {
		// 	eventSource = this.filterProfile(eventSource, profile)
		// }

    	let newStracture:CustomCalendarEvent[];

		newStracture = this.encapsulation(eventSource);

		return this.display(newStracture, selectedDate)
	}

	display(list: CustomCalendarEvent[], selectedDate) {
		let days = {};

		list.forEach( (event:CustomCalendarEvent, index) => {


			var startDate: any = new Date(event.start);

			var endDate: any = this.dateService.EventEndDateTreatment({
				startTime: startDate,
				endTime: event.end
			})

		
			
			const day = this.dateService.getDay(event.start) 
			
			event['manyDays'] = !this.dateService.isSameDate(event.start, event.end)
			event['todayOnly'] = this.dateService.isSameDate(event.start, event.end)


			if(!days.hasOwnProperty(day)) {
				days[day] = []
			}

			const diffDays = this.dateService.deferenceBetweenDays(endDate, startDate)

			if (this.dateService.notSameDate(startDate, endDate)) {



				if (diffDays <= 150 && !event.event.IsAllDayEvent ) {

					if (diffDays >= 1) {
						
						const StartEvent =  this.transForm(event, {startMany: true, endMany: false,	middle: false})
						
						if(this.CanPush(event, selectedDate)) days[day].push(StartEvent)
						
						let i = 1;
						
						// create event between date
						while (startDate.getFullYear() !=  endDate.getFullYear() || 
							startDate.getMonth() != endDate.getMonth() ||
							startDate.getDate() != endDate.getDate()) {

							const newDate = startDate.setDate(startDate.getDate()+ i)
							let otherDays =   this.dateService.getDay(newDate) 
								
							event['other'] = true
							
							event.start = newDate
							if(!days.hasOwnProperty(otherDays)) {

								days[otherDays] = []
							}
							
							if (!(startDate.getFullYear() !=  endDate.getFullYear() || 
							startDate.getMonth() != endDate.getMonth() ||
							startDate.getDate() != endDate.getDate())) {
								// last push

								const EndEvent = this.transForm(event, {startMany: false, endMany: true, middle: false})
								if(this.CanPush(event, selectedDate)) days[otherDays].push(EndEvent)

							} else {

								const EndEvent = this.transForm(event, {startMany: false,endMany: true,	middle: true})
								if(this.CanPush(event, selectedDate)) days[otherDays].push(EndEvent)
							}
							
						}

					} else {


						if(this.CanPush(event, selectedDate)) days[day].push(event)
					}
				} else {

					if(this.CanPush(event, selectedDate)) days[day].push(event)
				}
			} else {
				if(this.CanPush(event, selectedDate) && diffDays != 2) days[day].push(event)
			}

			// 

		})

		// remove days that haven't event
		Object.entries(days).forEach(([index, value]) => {
		const _value: any = value

		if(_value.length == 0) {
			delete days[index]
		}

		})

		return days
	}

	CanPush(event: any, selectedDate: Date) {

		return  new Date(event.start).getMonth() == selectedDate.getMonth() &&
				new Date(event.start).getFullYear() == selectedDate.getFullYear() && 
				new Date(event.start).getDate() >= selectedDate.getDate()
	}

	encapsulation(eventsList:EventListStore[]): CustomCalendarEvent[] {

		// remove all event
		let events: CustomCalendarEvent[] = [];

		eventsList.forEach((element, eventIndex) => {
			
			events.push({
				start: new Date(element.startTime),
				end: new Date(element.endTime),
				id: element.id,
				event: element.event,
				profile: element.profile
			});

		});

		return events;
	}

	transForm(event:  CustomCalendarEvent, {startMany, endMany, middle}) {
		return Object.assign({}, {
		start: event.start,
		end: event.end,
		id: event.id,
		profile: event.profile,
		event: {
			Subject: event.event.Subject,
			StartDate:  event.event.StartDate,
			EndDate: event.event.EndDate,
			Location:  event.event.Location,
			EventId:  event.event.EventId,
			CalendarName: event.event.CalendarName,
			CalendarId: event.event.CalendarId
		},
		Subject: event.event.Subject,
		startMany: startMany,
		endMany: endMany,
		middle: middle
		})
	}

}