import { VNode } from 'vue';
import { ClassComponent, GlobalComponentConstructor } from '../ts-helpers';

export interface PageState {
    /**
     * Index of first record
     */
    first: number;
    /**
     * Number of rows to display in new page
     */
    rows: number;
    /**
     * New page number
     */
    page: number;
    /**
     * Total number of pages
     */
    pageCount?: number;
}

export interface PaginatorProps {
    /**
     * Number of total records.
     * Default value is 0.
     */
    totalRecords?: number | undefined;
    /**
     * Data count to display per page.
     * Default value is 0.
     */
    rows?: number | undefined;
    /**
     * Zero-relative number of the first row to be displayed.
     * Default value is 0.
     */
    first?: number | undefined;
    /**
     * Number of page links to display.
     * Default value is 5.
     */
    pageLinkSize?: number | undefined;
    /**
     * Array of integer values to display inside rows per page dropdown.
     */
    rowsPerPageOptions?: number[] | undefined;
    /**
     * Template of the paginator, can either be a string or an object with key-value pairs to define templates per breakpoint.
     *
     * - FirstPageLink
     * - PrevPageLink
     * - PageLinks
     * - NextPageLink
     * - LastPageLink
     * - RowsPerPageDropdown
     * - JumpToPageDropdown
     * - JumpToPageInput
     * - CurrentPageReport
     */
    template?: any | string;
    /**
     * Template of the current page report element. It displays information about the pagination state. Default value is ({currentPage} of {totalPages}) whereas available placeholders are the following;
     *
     * - {currentPage}
     * - {totalPages}
     * - {rows}
     * - {first}
     * - {last}
     * - {totalRecords}
     */
    currentPageReportTemplate?: string | undefined;
    /**
     * Whether to show the paginator even there is only one page.
     * Default value is true.
     */
    alwaysShow?: boolean | undefined;
}

export interface PaginatorSlots {
    /**
     * Custom start template.
     * @param {Object} scope - start slot's params.
     */
    start: (scope: {
        /**
         * Current state
         * @see PageState
         */
        state: PageState;
    }) => VNode[];
    /**
     * Custom end template.
     * @param {Object} scope - end slot's params.
     */
    end: (scope: {
        /**
         * Current state
         * @see PageState
         */
        state: PageState;
    }) => VNode[];
}

export declare type PaginatorEmits = {
    /**
     * Emitted when the first changes.
     * @param {number} value - New value.
     */
    'update:first': (value: number) => void;
    /**
     * Emitted when the rows changes.
     * @param {number} value - New value.
     */
    'update:rows': (value: number) => void;
    /**
     * Callback to invoke when page changes, the event object contains information about the new state.
     * @param {PageState} event - New page state.
     */
    page: (event: PageState) => void;
};

declare class Paginator extends ClassComponent<PaginatorProps, PaginatorSlots, PaginatorEmits> {}

declare module '@vue/runtime-core' {
    interface GlobalComponents {
        Paginator: GlobalComponentConstructor<Paginator>;
    }
}

/**
 *
 * Paginator is a generic component to display content in paged format.
 *
 * Demos:
 *
 * - [Paginator](https://www.primefaces.org/primevue/paginator)
 *
 */
export default Paginator;