/*
 * Deepkit Framework
 * Copyright (C) 2021 Deepkit UG, Marc J. Schmidt
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the MIT License.
 *
 * You should have received a copy of the MIT License along with this program.
 */

import { ChangeDetectorRef, Component, Input, OnChanges, OnDestroy } from '@angular/core';
import { ProgressTracker } from '@deepkit/core-rxjs';
import { Subscription } from 'rxjs';

@Component({
    selector: 'dui-indicator',
    standalone: false,
    template: `
        <div [class.invisible]="step <= 0" [style.width.%]="step * 100" class="active"></div>
    `,
    styleUrls: ['./indicator.component.scss']
})
export class IndicatorComponent {
    @Input() step: number = 0;
}


@Component({
    standalone: false,
    selector: 'dui-progress-indicator',
    styles: [`
        .indicator {
            display: inline-flex;
            align-items: center;
            opacity: 1;
            transition: opacity .3s ease-in-out;
        }

        .indicator.vertical {
            flex-direction: column;
            align-items: flex-start;
        }

        .label {
            padding-left: 4px;
        }

        .percentage {
            display: inline-block;
            width: 55px;
            text-align: right;
        }

        .hide {
            opacity: 0;
        }
    `],
    template: `
        <div class="indicator" [class.vertical]="display === 'vertical'" [class.hide]="progressTracker.ended" *ngIf="progressTracker">
            <dui-indicator [step]="step"></dui-indicator>
            <div class="label" *ngIf="progressTracker.current as group">
                <span class="percentage text-light text-tabular">{{progressTracker.progress*100|number:'0.2-2'}}%</span> - {{group.message}}
            </div>
        </div>
    `
})
export class ProgressIndicatorComponent implements OnChanges, OnDestroy {
    @Input() progressTracker?: ProgressTracker;
    @Input() display: 'horizontal' | 'vertical' = 'horizontal';

    step: number = 0;
    sub?: Subscription;

    constructor(private cd: ChangeDetectorRef) {
    }

    ngOnChanges(): void {
        if (this.sub) this.sub.unsubscribe();
        if (this.progressTracker) {
            this.sub = this.progressTracker.subscribe(v => {
                this.step = this.progressTracker!.progress;
                this.cd.detectChanges();
            });
        }
    }

    ngOnDestroy(): void {
        if (this.sub) this.sub.unsubscribe();
    }
}