import { TemplateRef } from '@angular/core';
import { PassThroughOption, PassThrough } from 'primeng/api';

/**
 * Custom pass-through(pt) options.
 * @template I Type of instance.
 *
 * @see {@link Scroller.pt}
 * @group Interface
 */
interface VirtualScrollerPassThroughOptions<I = unknown> {
    /**
     * Used to pass attributes to the host's DOM element.
     */
    host?: PassThroughOption<HTMLElement, I>;
    /**
     * Used to pass attributes to the root's DOM element.
     */
    root?: PassThroughOption<HTMLDivElement, I>;
    /**
     * Used to pass attributes to the content's DOM element.
     */
    content?: PassThroughOption<HTMLDivElement, I>;
    /**
     * Used to pass attributes to the spacer's DOM element.
     */
    spacer?: PassThroughOption<HTMLDivElement, I>;
    /**
     * Used to pass attributes to the loader's DOM element.
     */
    loader?: PassThroughOption<HTMLDivElement, I>;
    /**
     * Used to pass attributes to the loading icon's DOM element.
     */
    loadingIcon?: PassThroughOption<HTMLElement, I>;
}
/**
 * Defines valid pass-through options in VirtualScroller.
 * @see {@link VirtualScrollerPassThroughOptions}
 *
 * @template I Type of instance.
 */
type VirtualScrollerPassThrough<I = unknown> = PassThrough<I, VirtualScrollerPassThroughOptions<I>>;
/**
 * Options of the scroll direction.
 * @group Types
 */
type ScrollerToType = 'to-start' | 'to-end' | undefined;
/**
 * Options of the scroller orientation.
 * @group Types
 */
type VirtualScrollerOrientationType = 'vertical' | 'horizontal' | 'both';
/**
 * Loader icon options.
 * @group Types
 */
interface ScrollerLoaderIconOptions {
    [klass: string]: any;
}
/**
 * Scroller content options.
 * @group Interface
 */
interface ScrollerContentOptions {
    contentStyleClass?: string;
    items?: any[];
    loading?: boolean;
    itemSize?: number;
    rows?: any[];
    columns?: any[];
    spacerStyle?: {
        [klass: string]: any;
    } | null | undefined;
    contentStyle?: {
        [klass: string]: any;
    } | null | undefined;
    vertical?: boolean;
    horizontal?: boolean;
    both?: boolean;
    getItemOptions?: (index: number) => ScrollerItemOptions;
    getLoaderOptions?: (index: number, options?: any) => ScrollerLoaderOptions;
}
/**
 * Scroller item options.
 * @group Interface
 */
interface ScrollerItemOptions {
    /**
     * Index of the item.
     */
    index?: number;
    /**
     * Item count.
     */
    count?: number;
    /**
     * Index of the first element in viewport.
     */
    first?: boolean;
    /**
     * Index of the last element in viewport.
     */
    last?: boolean;
    /**
     * Defines if index is even number.
     */
    even?: boolean;
    /**
     * Defines if index is odd number.
     */
    odd?: boolean;
}
/**
 * Loader settings.
 * @extends {ScrollerItemOptions}
 * @group Interface
 */
interface ScrollerLoaderOptions extends ScrollerItemOptions {
    [klass: string]: any;
}
/**
 * Custom lazy load event.
 * @see {@link Scroller.onLazyLoad}
 * @group Events
 */
interface ScrollerLazyLoadEvent {
    /**
     * First element index in viewport.
     */
    first: number;
    /**
     * Last element index in viewport.
     */
    last: number;
}
/**
 * Custom scroll index change event.
 * @see {@link Scroller.onScrollIndexChange}
 * @extends {ScrollerLazyLoadEvent}
 * @group Events
 */
interface ScrollerScrollIndexChangeEvent extends ScrollerLazyLoadEvent {
}
/**
 * Custom scroll event.
 * @see {@link Scroller.onScroll}
 * @group Events
 */
interface ScrollerScrollEvent {
    /**
     * Browser event.
     */
    originalEvent?: Event;
}
/**
 * Custom content template context.
 * @group Interface
 */
interface ScrollerContentTemplateContext {
    /**
     * Loaded items.
     */
    $implicit: any[] | any | null | undefined;
    /**
     * Content options.
     */
    options: ScrollerContentOptions;
}
/**
 * Custom item template context.
 * @group Interface
 */
interface ScrollerItemTemplateContext {
    /**
     * Item instance.
     */
    $implicit: any;
    /**
     * Scroller item options.
     */
    options: ScrollerItemOptions;
}
/**
 * Custom loader template context.
 * @group Interface
 */
interface ScrollerLoaderTemplateContext {
    /**
     * Loader options.
     */
    options: ScrollerLoaderOptions;
}
/**
 * Custom loader icon template context.
 * @group Interface
 */
interface ScrollerLoaderIconTemplateContext {
    /**
     * Loader icon options.
     */
    options: ScrollerLoaderIconOptions;
}
/**
 * Defines valid templates in Scroller.
 * @group Templates
 */
interface ScrollerTemplates {
    /**
     * Custom content template.
     * @param {ScrollerContentTemplateContext} context - content context.
     */
    content(context: ScrollerContentTemplateContext): TemplateRef<ScrollerContentTemplateContext>;
    /**
     * Custom item template.
     * @param {ScrollerItemTemplateContext} context - item context.
     */
    item(context: ScrollerItemTemplateContext): TemplateRef<ScrollerItemTemplateContext>;
    /**
     * Custom loader template.
     * @param {ScrollerLoaderTemplateContext} context - loader context.
     */
    loader(context: ScrollerLoaderTemplateContext): TemplateRef<ScrollerLoaderTemplateContext>;
    /**
     * Custom loader icon template.
     * @param {ScrollerLoaderIconTemplateContext} context - loader icon context.
     */
    loadericon(context: ScrollerLoaderIconTemplateContext): TemplateRef<ScrollerLoaderIconTemplateContext>;
}

export type { ScrollerContentOptions, ScrollerContentTemplateContext, ScrollerItemOptions, ScrollerItemTemplateContext, ScrollerLazyLoadEvent, ScrollerLoaderIconOptions, ScrollerLoaderIconTemplateContext, ScrollerLoaderOptions, ScrollerLoaderTemplateContext, ScrollerScrollEvent, ScrollerScrollIndexChangeEvent, ScrollerTemplates, ScrollerToType, VirtualScrollerOrientationType, VirtualScrollerPassThrough, VirtualScrollerPassThroughOptions };