import {
    Directive, ElementRef, Input, Renderer2, HostBinding, Component, ChangeDetectionStrategy,
    ChangeDetectorRef, Optional, OnInit, OnDestroy, HostListener, ViewChild
} from '@angular/core';
import { CdkCell, CdkCellDef, CdkColumnDef, CdkHeaderCell, CdkHeaderCellDef, DataSource } from '@angular/cdk/table';
import { Subscription } from 'rxjs/Subscription';

import { NovoSelection } from './sort';
import { SimpleTableColumn, SimpleTableActionColumn, SimpleTableActionColumnOption } from './interfaces';
import { Helpers } from '../../utils/Helpers';
import { NovoLabelService } from '../../services/novo-label-service';

/** Workaround for https://github.com/angular/angular/issues/17849 */
export const _NovoCellDef = CdkCellDef;
export const _NovoHeaderCellDef = CdkHeaderCellDef;
export const _NovoColumnDef = CdkColumnDef;
export const _NovoHeaderCell = CdkHeaderCell;
export const _NovoCell = CdkCell;

@Directive({
    selector: '[novoSimpleCellDef]',
    providers: [{ provide: CdkCellDef, useExisting: NovoSimpleCellDef }]
})
export class NovoSimpleCellDef extends _NovoCellDef { }

@Directive({
    selector: '[novoSimpleHeaderCellDef]',
    providers: [{ provide: CdkHeaderCellDef, useExisting: NovoSimpleHeaderCellDef }]
})
export class NovoSimpleHeaderCellDef extends _NovoHeaderCellDef { }

@Directive({
    selector: '[novoSimpleColumnDef]',
    providers: [{ provide: CdkColumnDef, useExisting: NovoSimpleColumnDef }],
})
export class NovoSimpleColumnDef extends _NovoColumnDef {
    @Input('novoSimpleColumnDef') name: string;
}

@Directive({
    selector: 'novo-simple-header-cell'
})
export class NovoSimpleHeaderCell<T> extends _NovoHeaderCell implements OnInit {
    @HostBinding('attr.role') public role = 'columnheader';

    @Input() public column: SimpleTableColumn<T>;

    constructor(columnDef: CdkColumnDef, private elementRef: ElementRef, private renderer: Renderer2) {
        super(columnDef, elementRef, renderer);
        renderer.setAttribute(elementRef.nativeElement, 'data-automation-id', `novo-column-header-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, `novo-column-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, 'novo-simple-header-cell');
    }

    public ngOnInit(): void {
        if (this.column.width) {
            this.renderer.setStyle(this.elementRef.nativeElement, 'min-width', `${this.column.width}px`);
            this.renderer.setStyle(this.elementRef.nativeElement, 'max-width', `${this.column.width}px`);
            this.renderer.setStyle(this.elementRef.nativeElement, 'width', `${this.column.width}px`);
        }
    }
}

@Directive({
    selector: 'novo-simple-empty-header-cell'
})
export class NovoSimpleEmptyHeaderCell extends _NovoHeaderCell {
    @HostBinding('attr.role') public role = 'columnheader';

    constructor(columnDef: CdkColumnDef, elementRef: ElementRef, renderer: Renderer2) {
        super(columnDef, elementRef, renderer);
        renderer.setAttribute(elementRef.nativeElement, 'data-automation-id', `novo-column-header-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, `novo-column-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, 'novo-simple-empty-header-cell');
    }
}

@Component({
    selector: 'novo-simple-checkbox-header-cell',
    template: `<novo-checkbox [(ngModel)]="selectAll" (ngModelChange)="toggle($event)"></novo-checkbox>`
})
export class NovoSimpleCheckboxHeaderCell extends _NovoHeaderCell implements OnDestroy {
    @HostBinding('attr.role') public role = 'columnheader';

    public selectAll: boolean = false;
    private selectAllSubscription: Subscription;

    constructor(columnDef: CdkColumnDef, elementRef: ElementRef, renderer: Renderer2, @Optional() private _selection: NovoSelection) {
        super(columnDef, elementRef, renderer);
        renderer.setAttribute(elementRef.nativeElement, 'data-automation-id', `novo-checkbox-column-header-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, `novo-checkbox-column-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, 'novo-simple-checkbox-header-cell');

        this.selectAllSubscription = _selection.novoSelectAllToggle.subscribe((value: boolean) => {
            this.selectAll = value;
        });
    }

    public ngOnDestroy(): void {
        this.selectAllSubscription.unsubscribe();
    }

    public toggle(value: boolean): void {
        this._selection.selectAll(value);
    }
}

@Component({
    selector: 'novo-simple-cell',
    template: `
        <span [class.clickable]="!!column.onClick" (click)="onClick($event)" #span>{{ column.renderer(row) }}</span>
    `,
    changeDetection: ChangeDetectionStrategy.OnPush
})
export class NovoSimpleCell<T> extends _NovoCell implements OnInit {
    @HostBinding('attr.role') public role = 'gridcell';

    @Input() public row: any;
    @Input() public column: SimpleTableColumn<T>;

    @ViewChild('span') private spanElement: ElementRef;

    constructor(columnDef: CdkColumnDef, private elementRef: ElementRef, private renderer: Renderer2) {
        super(columnDef, elementRef, renderer);
        renderer.setAttribute(elementRef.nativeElement, 'data-automation-id', `novo-column-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, `novo-column-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, 'novo-simple-cell');
    }

    public ngOnInit(): void {
        if (this.column.customClass) {
            this.renderer.addClass(this.elementRef.nativeElement, this.column.customClass(this.row));
        }
        if (this.column.width) {
            this.renderer.setStyle(this.elementRef.nativeElement, 'min-width', `${this.column.width}px`);
            this.renderer.setStyle(this.elementRef.nativeElement, 'max-width', `${this.column.width}px`);
            this.renderer.setStyle(this.elementRef.nativeElement, 'width', `${this.column.width}px`);
            // TODO - this inhibits resizing the page after the initial load -- but do we care?!?!
            // this.renderer.setStyle(this.spanElement.nativeElement, 'min-width', `${this.column.width - 20}px`);
            // this.renderer.setStyle(this.spanElement.nativeElement, 'max-width', `${this.column.width - 20}px`);
            // this.renderer.setStyle(this.spanElement.nativeElement, 'width', `${this.column.width - 20}px`);
        }
        // else {
        //     // TODO - this inhibits resizing the page after the initial load -- but do we care?!?!
        //     this.renderer.setStyle(this.spanElement.nativeElement, 'min-width', `${this.elementRef.nativeElement.offsetWidth - 20}px`);
        //     this.renderer.setStyle(this.spanElement.nativeElement, 'max-width', `${this.elementRef.nativeElement.offsetWidth - 20}px`);
        //     this.renderer.setStyle(this.spanElement.nativeElement, 'width', `${this.elementRef.nativeElement.offsetWidth - 20}px`);
        // }
    }

    public onClick(event: MouseEvent): void {
        Helpers.swallowEvent(event);
        if (this.column.onClick) {
            this.column.onClick(this.row);
        }
        return;
    }
}

@Component({
    selector: 'novo-simple-checkbox-cell',
    template: `
        <novo-checkbox [ngModel]="selected" (ngModelChange)="toggle($event)"></novo-checkbox>
    `
})
export class NovoSimpleCheckboxCell extends _NovoCell implements OnDestroy, OnInit {
    @HostBinding('attr.role') public role = 'gridcell';

    @Input() public row: any;
    @Input() public index: any;

    public selected: boolean = false;
    private selectAllSubscription: Subscription;

    constructor(public columnDef: CdkColumnDef, elementRef: ElementRef, renderer: Renderer2, @Optional() public _selection: NovoSelection) {
        super(columnDef, elementRef, renderer);
        renderer.setAttribute(elementRef.nativeElement, 'data-automation-id', `novo-checkbox-column-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, `novo-checkbox-column-${columnDef.cssClassFriendlyName}`);
        renderer.addClass(elementRef.nativeElement, 'novo-simple-checkbox-cell');

        this.selectAllSubscription = _selection.novoSelectAllToggle.subscribe((value: boolean) => {
            this.selected = value;
        });
    }

    public ngOnInit(): void {
        this._selection.register(this.row.id || this.index, this.row);
        this.selected = this._selection.state.selectedRows.has(this.row.id || this.index);
    }

    public ngOnDestroy(): void {
        this._selection.deregister(this.row.id || this.index);
        this.selectAllSubscription.unsubscribe();
    }

    public toggle(value: boolean): void {
        this._selection.toggle(this.row.id || this.index, value, this.row);
    }
}

@Component({
    selector: 'novo-simple-action-cell',
    template: `
        <ng-container *ngIf="!column.options">
            <button theme="icon" [icon]="column.icon" (click)="column.onClick(row)" [disabled]="isDisabled(column, row)"></button>
        </ng-container>
        <ng-container *ngIf="column.options">
            <novo-dropdown appendToBody="true" parentScrollSelector=".novo-simple-table" containerClass="novo-table-dropdown-cell">
                <button type="button" theme="dialogue" icon="collapse" inverse>{{ column.label || labels.actions }}</button>
                <list>
                    <item *ngFor="let option of column.options" (action)="option.onClick(row)" [disabled]="isDisabled(option, row)">
                        <span [attr.data-automation-id]="option.label">{{ option.label }}</span>
                    </item>
                </list>
            </novo-dropdown>
        </ng-container>
    `,
    changeDetection: ChangeDetectionStrategy.OnPush
})
export class NovoSimpleActionCell<T> extends _NovoCell implements OnInit {
    @HostBinding('attr.role') public role = 'gridcell';

    @Input() public row: T;
    @Input() public column: SimpleTableActionColumn<T>;

    constructor(columnDef: CdkColumnDef, private elementRef: ElementRef, private renderer: Renderer2, private labels: NovoLabelService) {
        super(columnDef, elementRef, renderer);
        renderer.setAttribute(elementRef.nativeElement, 'data-automation-id', `novo-action-column-${columnDef.cssClassFriendlyName}`);
    }

    public ngOnInit(): void {
        if (this.column.options) {
            this.renderer.addClass(this.elementRef.nativeElement, 'novo-simple-dropdown-cell');
        } else {
            this.renderer.addClass(this.elementRef.nativeElement, 'novo-simple-button-cell');
        }
    }

    public isDisabled(check: SimpleTableActionColumn<T> | SimpleTableActionColumnOption<T>, row: T): boolean {
        if (check.disabled === true) {
            return true;
        }
        if (check.disabledCheck) {
            return check.disabledCheck(row);
        }
        return false;
    }
}