/*!
 * V4Fire Client Core
 * https://github.com/V4Fire/Client
 *
 * Released under the MIT license
 * https://github.com/V4Fire/Client/blob/master/LICENSE
 */

import type { ComponentItem, VirtualScrollState, MountedChild, MountedItem } from 'base/b-virtual-scroll-new/interface';

import type { SpyObject } from 'tests/helpers/mock/interface';
import type { RequestInterceptor } from 'tests/helpers';
import type { VirtualScrollComponentObject } from 'base/b-virtual-scroll-new/test/api/component-object';

/**
 * The interface defining the data conveyor for convenient data manipulation.
 */
export interface DataConveyor<DATA = any> {
	/**
	 * Adds a specified number of data items to the conveyor.
	 *
	 * @param count - the number of data items to add.
	 * @returns An array containing the newly added data items.
	 */
	addData(count: number): DATA[];

	/**
	 * Adds a specified number of mounted items to the conveyor.
	 *
	 * @param count - the number of mounted items to add.
	 * @returns An array containing the newly added mounted items.
	 */
	addItems(count: number): MountedItem[];

	/**
	 * Adds a specified number of mounted child items (separators) to the conveyor.
	 *
	 * @param count - the number of mounted child items to add.
	 * @returns An array containing the newly added mounted child items.
	 */
	addSeparators(count: number): MountedChild[];

	/**
	 * Adds an array of component items as mounted child items to the conveyor.
	 *
	 * @param child - the array of component items to add as mounted child items.
	 * @returns The updated array of mounted child items.
	 */
	addChild(child: ComponentItem[]): MountedChild[];

	/**
	 * Returns an array of data for the given index added using the `addData` method.
	 *
	 * @param index - the index of the data chunk.
	 * @returns An array of data.
	 */
	getDataChunk(index: number): DATA[];

	/**
	 * Sets the value of total data
	 * @param newTotal
	 */
	setTotal(newTotal: number): number;

	/**
	 * Resets the data conveyor, clearing all data and items.
	 */
	reset(): void;

	/**
	 * Retrieves the array of data items in the conveyor.
	 */
	get data(): DATA[];

	/**
	 * Returns the data amount
	 * @param newTotal
	 */
	get total(): CanUndef<number>;

	/**
	 * Returns a data page.
	 */
	get page(): number;

	/**
	 * Retrieves the array of mounted child items in the conveyor.
	 */
	get childList(): MountedChild[];

	/**
	 * Retrieves the array of last loaded data items in the conveyor.
	 */
	get lastLoadedData(): DATA[];

	/**
	 * Retrieves the array of mounted items in the conveyor.
	 */
	get items(): MountedItem[];
}

/**
 * The interface defining the API for manipulating the component state.
 */
export interface StateApi {
	/**
	 * Compiles and returns the assembled component state object.
	 *
	 * @param override - An object for overriding the current fields of the component state.
	 * @returns The compiled component state.
	 */
	compile(override?: Partial<VirtualScrollState>): VirtualScrollState;

	/**
	 * Resets the component state to its initial values.
	 */
	reset(): void;

	/**
	 * Sets the values from an object as the current state. Fields set using this method are not automatically reset,
	 * and they can only be reset by overriding them or using the `reset` method.
	 *
	 * @param props - An object containing the new state values.
	 * @returns The updated StateApi object.
	 */
	set(props: Partial<VirtualScrollState>): StateApi;

	/**
	 * The data conveyor used for managing data within the component state.
	 */
	data: DataConveyor;
}

/**
 * Helpers returned by the `createTestHelpers` function.
 */
export interface VirtualScrollTestHelpers {
	/**
	 * The component object representing the `bVirtualScrollNew` component.
	 */
	component: VirtualScrollComponentObject;

	/**
	 * The spy object for the `initLoad` function.
	 */
	initLoadSpy: SpyObject;

	/**
	 * The request interceptor provider.
	 */
	provider: RequestInterceptor;

	/**
	 * The state API object for convenient manipulation of the component's state fork.
	 */
	state: StateApi;
}

export interface IndexedObj {
	i: number;
}

export type DataItemCtor<COMPILED = any> = (i: number) => COMPILED;
export type MountedItemCtor<DATA = any> = (data: DATA, i: number) => MountedItem;
export type MountedSeparatorCtor<DATA = any> = (data: DATA, i: number) => MountedChild;