import { CommonModule } from '@angular/common';
import {
    Component,
    input,
    output,
    ViewEncapsulation,
    ChangeDetectionStrategy,
} from '@angular/core';
import { FormGroup, ReactiveFormsModule } from '@angular/forms';
import { MatButtonModule } from '@angular/material/button';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatIconModule } from '@angular/material/icon';
import { MatInputModule } from '@angular/material/input';
import { MatSelectModule } from '@angular/material/select';
import { MatSlideToggleModule } from '@angular/material/slide-toggle';
import { MatTooltipModule } from '@angular/material/tooltip';
import { TranslateModule } from '@ngx-translate/core';
import {
    StreamFormat,
    VideoPlayer,
    reportsPlaybackFailures,
} from '@iptvnator/shared/interfaces';
import { SettingsPlayerOption } from './settings.models';
import { markSectionForCheckOnFormEvents } from './settings-section-form-render';
import { provideFormFieldDefaults } from '@iptvnator/ui/components/form-field-defaults';

@Component({
    selector: 'app-settings-playback-section',
    providers: [provideFormFieldDefaults()],
    imports: [
        CommonModule,
        MatButtonModule,
        MatFormFieldModule,
        MatIconModule,
        MatInputModule,
        MatSelectModule,
        MatSlideToggleModule,
        MatTooltipModule,
        ReactiveFormsModule,
        TranslateModule,
    ],
    templateUrl: './settings-playback-section.component.html',
    encapsulation: ViewEncapsulation.None,
    changeDetection: ChangeDetectionStrategy.OnPush,
    styles: [':host { display: contents; }'],
})
export class SettingsPlaybackSectionComponent {
    readonly mpvPlayerArgumentsPlaceholder = [
        '--ontop',
        '--autofit=640x360',
        '--geometry=+80+80',
    ].join('\n');
    readonly vlcPlayerArgumentsPlaceholder = [
        '--video-on-top',
        '--width=640',
        '--height=360',
    ].join('\n');

    readonly form = input.required<FormGroup>();

    constructor() {
        // Parent patches (Discard, backup import) change the form outside
        // this OnPush section's events.
        markSectionForCheckOnFormEvents(this.form);
    }

    readonly players = input.required<SettingsPlayerOption[]>();
    readonly streamFormatEnum = input.required<typeof StreamFormat>();
    readonly isDesktop = input(false);
    /** Frame-copy embedded MPV engine is possible on this machine */
    readonly frameCopyAvailable = input(false);
    /** Frame-copy engine is what the current app run actually uses */
    readonly frameCopyActive = input(false);
    readonly supportsManagedExternalPlayers = input(false);
    readonly supportsExternalPlayerPathSettings = input(false);
    /**
     * Cross-playlist movie matching is Electron-only, so the auto-failover
     * toggle would control nothing in the PWA.
     */
    readonly supportsVodMultiSource = input(false);
    readonly selectRecordingFolder = output<void>();

    isWebPlayerSelected(): boolean {
        return reportsPlaybackFailures(this.form().value.player);
    }

    /**
     * The fullscreen channel panel lives inside the fullscreen element the
     * shared controls own (the player view host). The legacy vendor chrome
     * fullscreens the engine's own element and external MPV/VLC own their
     * own window, so in both cases the toggle would control nothing.
     * Embedded MPV always renders the shared controls.
     */
    supportsFullscreenChannelPanel(): boolean {
        const value = this.form().value;
        return (
            (this.isWebPlayerSelected() &&
                value.webPlayerSharedControls !== false) ||
            value.player === VideoPlayer.EmbeddedMpv
        );
    }

    /**
     * The Up next card is part of the shared controls. Embedded MPV mounts
     * them only under the frame-copy engine; the native-view engine keeps
     * its own dock, where the toggle would control nothing.
     */
    supportsUpNextCard(): boolean {
        const value = this.form().value;
        return (
            (this.isWebPlayerSelected() &&
                value.webPlayerSharedControls !== false) ||
            (value.player === VideoPlayer.EmbeddedMpv && this.frameCopyActive())
        );
    }

    isExternalPlayerSelected(): boolean {
        const player = this.form().value.player;
        return player === VideoPlayer.MPV || player === VideoPlayer.VLC;
    }

    isEmbeddedMpvSelected(): boolean {
        return this.form().value.player === VideoPlayer.EmbeddedMpv;
    }
}