import { inject, Pipe, PipeTransform } from '@angular/core';
import { UnixTimePipe } from './unix-time.pipe';

@Pipe({
	name: 'eventDates',
	standalone: true,
})
export class EventDatesPipe implements PipeTransform {
	private unixTimePipe = inject(UnixTimePipe);
	transform(dates: number[]): string {
		const [start] = dates;
		const datesString = this.getDatesString(dates);
		const month = this.getMonth(start);
		const year = this.unixTimePipe.transform(start, 'yyyy');
		// const hour = this.unixTimePipe.transform(start, 'HH:mm');
		return `${datesString} de ${month} de ${year}`;
	}
	private getDatesString(dates: number[]) {
		if (dates.length === 1) {
			return this.unixTimePipe.transform(dates[0], 'dd');
		}
		return dates
			.map((date) => this.unixTimePipe.transform(date, 'dd'))
			.reduce((prev, curr, idx) => {
				if (idx === 0) {
					return curr;
				}
				return idx === dates.length - 1 ? `${prev} y ${curr}` : `${prev}, ${curr}`;
			}, '');
	}
	private getMonth(date: number) {
		const m = this.unixTimePipe.transform(date, 'MMMM') || '';
		return m
			.split('')
			.map((letter, idx) => (idx === 0 ? letter.toUpperCase() : letter))
			.join('');
	}
}