import {Component, HostListener, Input, OnInit, ViewChild} from '@angular/core';
import {EditorNodeContract} from '../EditorNode.contract';
import {EditorService} from '../../../service/editor.service';

@Component({
    selector: 'editor-norm',
    templateUrl: './norm.component.html',
    styleUrls: ['./norm.component.scss'],
})
export class NormComponent extends EditorNodeContract implements OnInit {
    @ViewChild('editable') editable;
    @Input() nodeId: string;

    public isFocused = false;
    public initialValue = 'Click to edit...';
    public contents = '';
    private dirtyOverride = false;

    constructor(
        public readonly editorService: EditorService,
    ) {
        super();
        this.contents = this.initialValue;
    }

    public isDirty(): boolean | Promise<boolean> {
        return this.dirtyOverride || this.contents !== this.initialValue;
    }

    public writeChangesToNode(): void | Promise<void> {
        this.nodeRec.value = this.contents;
        this.initialValue = this.contents;
    }

    ngOnInit() {
        this.editorService.registerNodeEditor(this.nodeId, this).then(() => {
            if ( !this.node.Value ) {
                this.node.Value = {};
            }

            if ( this.node.Value.Value ) {
                this.initialValue = this.node.Value.Value;
            }
            this.contents = this.initialValue;
        });
    }

    onFocusIn(event: MouseEvent) {
        this.isFocused = true;
    }

    onFocusOut(event: MouseEvent) {
        this.isFocused = false;
    }

    documentCommand(cmd: string) {
        // Yes, technically this is deprecated, but it'll be poly-filled if necessary. Bite me.
        document.execCommand(cmd, false, '');
    }

    onContentsChanged(contents: string) {
        const innerHTML = this.editable.nativeElement.innerHTML;
        if ( this.contents !== innerHTML ) {
            this.contents = innerHTML;
        }
    }

    @HostListener('document:keydown.tab', ['$event'])
    onIndent(event) {
        event.preventDefault();
        this.documentCommand('indent');
    }

    @HostListener('document:keydown.shift.tab', ['$event'])
    onOutdent(event) {
        event.preventDefault();
        this.documentCommand('outdent');
    }

    @HostListener('document:keydown.control.b', ['$event'])
    onBold(event) {
        event.preventDefault();
        this.documentCommand('bold');
    }

    @HostListener('document:keydown.control.i', ['$event'])
    onItalic(event) {
        event.preventDefault();
        this.documentCommand('italic');
    }

    @HostListener('document:keydown.control.u', ['$event'])
    onUnderline(event) {
        event.preventDefault();
        this.documentCommand('underline');
    }

    @HostListener('document:keydown.control.z', ['$event'])
    onUndo(event) {
        event.preventDefault();
        this.documentCommand('undo');
    }

    @HostListener('document:keydown.control.shift.z', ['$event'])
    onRedo(event) {
        event.preventDefault();
        this.documentCommand('redo');
    }
}