/*
 * Squidex Headless CMS
 *
 * @license
 * Copyright (c) Squidex UG (haftungsbeschränkt). All rights reserved.
 */

import { Component, ElementRef, EventEmitter, Input, OnInit, Output, ViewChild } from '@angular/core';
import { FormBuilder } from '@angular/forms';
import { onErrorResumeNext } from 'rxjs/operators';

import {
    AddFieldForm,
    AppPatternDto,
    createProperties,
    EditFieldForm,
    FieldDto,
    fieldTypes,
    ImmutableArray,
    PatternsState,
    RootFieldDto,
    SchemaDetailsDto,
    SchemasState,
    Types,
    UpdateFieldDto
} from '@app/shared';

@Component({
    selector: 'sqx-field-wizard',
    styleUrls: ['./field-wizard.component.scss'],
    templateUrl: './field-wizard.component.html'
})
export class FieldWizardComponent implements OnInit {
    @ViewChild('nameInput')
    public nameInput: ElementRef;

    @Input()
    public schema: SchemaDetailsDto;

    @Input()
    public parent: RootFieldDto;

    @Output()
    public completed = new EventEmitter();

    public fieldTypes = fieldTypes;

    public addFieldForm = new AddFieldForm(this.formBuilder);
    public editForm = new EditFieldForm(this.formBuilder);
    public field: FieldDto;
    public isEditing = false;
    public selectedTab = 0;
    public patterns: ImmutableArray<AppPatternDto>;

    constructor(
        private readonly formBuilder: FormBuilder,
        private readonly schemasState: SchemasState,
        public readonly patternsState: PatternsState
    ) {}

    public ngOnInit() {
        if (this.parent) {
            this.fieldTypes = this.fieldTypes.filter(x => x.type !== 'Array');
        }
        this.patternsState
            .load()
            .pipe(onErrorResumeNext())
            .subscribe();
    }

    public complete() {
        this.completed.emit();
    }

    public addField(next: boolean, edit: boolean) {
        const value = this.addFieldForm.submit();

        if (value) {
            this.schemasState.addField(this.schema, value, this.parent).subscribe(
                dto => {
                    this.field = dto;
                    this.addFieldForm.submitCompleted({ type: fieldTypes[0].type });

                    if (next) {
                        if (Types.isFunction(this.nameInput.nativeElement.focus)) {
                            this.nameInput.nativeElement.focus();
                        }
                    } else if (edit) {
                        this.selectTab(0);
                        this.isEditing = true;
                    } else {
                        this.complete();
                    }
                },
                error => {
                    this.addFieldForm.submitFailed(error);
                }
            );
        }
    }

    public selectTab(tab: number) {
        this.selectedTab = tab;
    }

    public save(addNew: boolean) {
        const value = this.editForm.submit();

        if (value) {
            const properties = createProperties(
                this.field.properties['fieldType'],
                value
            );

            this.schemasState
                .updateField(
                    this.schema,
                    this.field as RootFieldDto,
                    new UpdateFieldDto(properties)
                )
                .subscribe(
                    () => {
                        this.editForm.submitCompleted();
                        if (addNew) {
                            this.isEditing = false;
                        } else {
                            this.complete();
                        }
                    },
                    error => {
                        this.editForm.submitFailed(error);
                    }
                );
        }
    }
}