import {Carousel, type CarouselItem, type CarouselOptions, type IndicatorItem} from 'flowbite';

class CustomCarousel extends HTMLElement {
    _slide: boolean;
    _items: CarouselItem[];
    _options: CarouselOptions;
    _carousel: Carousel;

    constructor() {
        super();

        this._slide = this.getAttribute('data-custom-carousel') === 'slide';
        this._items = this._getItems();
        this._options = this._getOptions();
        this._carousel = new Carousel(this, this._items, this._options);

        if (this._slide && this._items.length > 0) this._carousel.cycle();

        window.addEventListener("load", this._attachHandlers);

    }

    _getItems = (): CarouselItem[] => {
        let customItems = this.querySelectorAll('[data-custom-carousel-item]') || [];

        return Array.from(customItems).map(
            (item, index): CarouselItem => {
                return {el: item as HTMLElement, position: index}
            }
        )
    }

    _getOptions = (): CarouselOptions => {
        let customIndicators = this.querySelectorAll('[data-custom-carousel-slide-to]') || [];

        return {
            defaultPosition: 0,
            interval: this.dataset.customCarouselInterval ? Number(this.dataset.customCarouselInterval) : 8000,

            indicators: {
                activeClasses: 'border-2 border-caperren-green bg-black',
                inactiveClasses: 'bg-caperren-green/40 hover:bg-caperren-green-light',
                items: Array.from(customIndicators).map(
                    (item, index): IndicatorItem => {
                        return {
                            el: item as HTMLElement,
                            position: Number(item.getAttribute('data-custom-carousel-slide-to'))
                        }
                    }
                )
            }
        }
    }

    _attachHandlers = (): void => {
        // Controls
        const carouselNextEl = this.querySelector(
            '[data-custom-carousel-next]'
        );
        const carouselPrevEl = this.querySelector(
            '[data-custom-carousel-prev]'
        );

        if (carouselNextEl) {
            carouselNextEl.addEventListener('click', () => {
                this._carousel.next();
            });
        }

        if (carouselPrevEl) {
            carouselPrevEl.addEventListener('click', () => {
                this._carousel.prev();
            });
        }
    }


}

customElements.define('custom-carousel', CustomCarousel)