/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { Component, ElementRef, Input, ViewChild, inject } from '@angular/core';
import { MAT_DIALOG_DATA, MatDialogModule } from '@angular/material/dialog';
import { CreateProcessGroupDialogRequest } from '../../../../../state/flow';
import { Store } from '@ngrx/store';
import { CanvasState } from '../../../../../state';
import { createProcessGroup, uploadProcessGroup } from '../../../../../state/flow/flow.actions';
import { selectSaving } from '../../../../../state/flow/flow.selectors';
import { AsyncPipe } from '@angular/common';
import { MatButtonModule } from '@angular/material/button';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';
import { MatOptionModule } from '@angular/material/core';
import { MatSelectModule } from '@angular/material/select';
import { NifiSpinnerDirective } from '../../../../../../../ui/common/spinner/nifi-spinner.directive';
import { FormBuilder, FormControl, FormGroup, ReactiveFormsModule, Validators } from '@angular/forms';
import { MatIconModule } from '@angular/material/icon';
import { ErrorContextKey } from '../../../../../../../state/error';
import { ContextErrorBanner } from '../../../../../../../ui/common/context-error-banner/context-error-banner.component';
import { openNewParameterContextDialog } from '../../../../../state/parameter/parameter.actions';
import {
    CloseOnEscapeDialog,
    NiFiCommon,
    NifiTooltipDirective,
    SelectOption,
    SortObjectByPropertyPipe,
    TextTip
} from '@nifi/shared';
import { ParameterContextEntity } from '../../../../../../../state/shared';
import { selectCurrentUser } from '../../../../../../../state/current-user/current-user.selectors';

@Component({
    selector: 'create-process-group',
    imports: [
        AsyncPipe,
        MatButtonModule,
        MatDialogModule,
        MatFormFieldModule,
        MatInputModule,
        NifiSpinnerDirective,
        ReactiveFormsModule,
        MatOptionModule,
        MatSelectModule,
        NifiTooltipDirective,
        MatIconModule,
        ContextErrorBanner,
        SortObjectByPropertyPipe
    ],
    templateUrl: './create-process-group.component.html',
    styleUrls: ['./create-process-group.component.scss']
})
export class CreateProcessGroup extends CloseOnEscapeDialog {
    private dialogRequest = inject<CreateProcessGroupDialogRequest>(MAT_DIALOG_DATA);
    private formBuilder = inject(FormBuilder);
    private store = inject<Store<CanvasState>>(Store);
    private nifiCommon = inject(NiFiCommon);

    @Input() set parameterContexts(parameterContexts: ParameterContextEntity[]) {
        this.parameterContextsOptions = [];
        this._parameterContexts = parameterContexts;
        let currentParameterContextIdEnabled: boolean = false;

        if (parameterContexts.length === 0) {
            this.parameterContextsOptions = [];
        } else {
            parameterContexts.forEach((parameterContext) => {
                if (parameterContext.permissions.canRead && parameterContext.component) {
                    this.parameterContextsOptions.push({
                        text: parameterContext.component.name,
                        value: parameterContext.id,
                        description: parameterContext.component.description
                    });

                    if (this.dialogRequest.currentParameterContextId === parameterContext.id) {
                        currentParameterContextIdEnabled = true;
                    }
                } else {
                    this.parameterContextsOptions.push({
                        text: parameterContext.id,
                        value: parameterContext.id,
                        disabled: true
                    });
                }
            });
        }

        if (currentParameterContextIdEnabled) {
            this.createProcessGroupForm
                .get('newProcessGroupParameterContext')
                ?.setValue(this.dialogRequest.currentParameterContextId);
        }
    }

    get parameterContexts() {
        return this._parameterContexts;
    }

    saving$ = this.store.select(selectSaving);

    protected readonly TextTip = TextTip;
    private _parameterContexts: ParameterContextEntity[] = [];

    @ViewChild('flowUploadControl') flowUploadControl!: ElementRef;

    createProcessGroupForm: FormGroup;
    parameterContextsOptions: SelectOption[] = [];

    flowNameAttached: string | null = null;
    flowDefinition: File | null = null;
    currentUser$ = this.store.select(selectCurrentUser);

    constructor() {
        super();

        this.createProcessGroupForm = this.formBuilder.group({
            newProcessGroupName: new FormControl('', Validators.required),
            newProcessGroupParameterContext: new FormControl(null)
        });
    }

    attachFlow(event: Event): void {
        const target = event.target as HTMLInputElement;
        const files = target.files as FileList;
        const file = files.item(0);
        if (file) {
            this.createProcessGroupForm
                .get('newProcessGroupName')
                ?.setValue(this.nifiCommon.substringBeforeLast(file.name, '.'));
            this.createProcessGroupForm.get('newProcessGroupName')?.markAsDirty();
            this.createProcessGroupForm.get('newProcessGroupParameterContext')?.setValue(null);
            this.flowNameAttached = file.name;
            this.flowDefinition = file;
        }
    }

    removeAttachedFlow(): void {
        this.createProcessGroupForm.get('newProcessGroupName')?.setValue('');
        this.flowUploadControl.nativeElement.value = '';
        this.flowNameAttached = null;
        this.flowDefinition = null;
    }

    createProcessGroup(): void {
        if (this.flowDefinition) {
            this.store.dispatch(
                uploadProcessGroup({
                    request: {
                        ...this.dialogRequest.request,
                        name: this.createProcessGroupForm.get('newProcessGroupName')?.value,
                        flowDefinition: this.flowDefinition
                    }
                })
            );
        } else {
            this.store.dispatch(
                createProcessGroup({
                    request: {
                        ...this.dialogRequest.request,
                        name: this.createProcessGroupForm.get('newProcessGroupName')?.value,
                        parameterContextId: this.createProcessGroupForm.get('newProcessGroupParameterContext')?.value
                    }
                })
            );
        }
    }

    openNewParameterContextDialog(): void {
        this.store.dispatch(
            openNewParameterContextDialog({ request: { parameterContexts: this.dialogRequest.parameterContexts } })
        );
    }

    protected readonly ErrorContextKey = ErrorContextKey;
}
