///
/// Copyright © 2016-2026 The Thingsboard Authors
///
/// Licensed 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, DestroyRef, forwardRef, Injector, Input, OnInit } from '@angular/core';
import {
  AbstractControl,
  ControlValueAccessor,
  FormArray,
  FormBuilder,
  FormGroup,
  NG_VALIDATORS,
  NG_VALUE_ACCESSOR,
  NgControl,
  Validator,
  Validators
} from '@angular/forms';
import { PageComponent } from '@shared/public-api';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { TranslateService } from '@ngx-translate/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';

@Component({
    selector: 'tb-kv-map-config-old',
    templateUrl: './kv-map-config-old.component.html',
    styleUrls: ['./kv-map-config-old.component.scss'],
    providers: [
        {
            provide: NG_VALUE_ACCESSOR,
            useExisting: forwardRef(() => KvMapConfigOldComponent),
            multi: true
        },
        {
            provide: NG_VALIDATORS,
            useExisting: forwardRef(() => KvMapConfigOldComponent),
            multi: true,
        }
    ],
    standalone: false
})
export class KvMapConfigOldComponent extends PageComponent implements ControlValueAccessor, OnInit, Validator {

  @Input() disabled: boolean;

  @Input() uniqueKeyValuePairValidator: boolean;

  @Input() requiredText: string;

  @Input() keyText: string;

  @Input() keyRequiredText: string;

  @Input() valText: string;

  @Input() valRequiredText: string;

  @Input() hintText: string;

  @Input() description: string;

  @Input() emptyText: string;

  private requiredValue: boolean;

  get required(): boolean {
    return this.requiredValue;
  }

  @Input()
  set required(value: boolean) {
    this.requiredValue = coerceBooleanProperty(value);
  }

  kvListFormGroup: FormGroup;

  ngControl: NgControl;

  public propagateChange = null;

  constructor(public translate: TranslateService,
              private injector: Injector,
              protected fb: FormBuilder,
              private destroyRef: DestroyRef) {
    super();
  }

  ngOnInit(): void {
    this.ngControl = this.injector.get(NgControl);
    if (this.ngControl != null) {
      this.ngControl.valueAccessor = this;
    }
    this.kvListFormGroup = this.fb.group({
      keyVals: this.fb.array([])
    });

    this.kvListFormGroup.valueChanges.pipe(
      takeUntilDestroyed(this.destroyRef)
    ).subscribe(() => {
      this.updateModel();
    });
  }

  keyValsFormArray(): FormArray {
    return this.kvListFormGroup.get('keyVals') as FormArray;
  }

  registerOnChange(fn: any): void {
    this.propagateChange = fn;
  }

  registerOnTouched(_fn: any): void {
  }

  setDisabledState(isDisabled: boolean): void {
    this.disabled = isDisabled;
    if (this.disabled) {
      this.kvListFormGroup.disable({emitEvent: false});
    } else {
      this.kvListFormGroup.enable({emitEvent: false});
    }
  }

  writeValue(keyValMap: { [key: string]: string }): void {
    const keyValsControls: Array<AbstractControl> = [];
    if (keyValMap) {
      for (const property of Object.keys(keyValMap)) {
        if (Object.prototype.hasOwnProperty.call(keyValMap, property)) {
          keyValsControls.push(this.fb.group({
            key: [property, [Validators.required]],
            value: [keyValMap[property], [Validators.required]]
          }));
        }
      }
    }
    this.kvListFormGroup.setControl('keyVals', this.fb.array(keyValsControls), {emitEvent: false});
  }

  public removeKeyVal(index: number) {
    (this.kvListFormGroup.get('keyVals') as FormArray).removeAt(index);
  }

  public addKeyVal() {
    const keyValsFormArray = this.kvListFormGroup.get('keyVals') as FormArray;
    keyValsFormArray.push(this.fb.group({
      key: ['', [Validators.required]],
      value: ['', [Validators.required]]
    }));
  }

  public validate() {
    const kvList: { key: string; value: string }[] = this.kvListFormGroup.get('keyVals').value;
    if (!kvList.length && this.required) {
      return {
        kvMapRequired: true
      };
    }
    if (!this.kvListFormGroup.valid) {
      return {
        kvFieldsRequired: true
      };
    }
    if (this.uniqueKeyValuePairValidator) {
      for (const kv of kvList) {
        if (kv.key === kv.value) {
          return {
            uniqueKeyValuePair: true
          };
        }
      }
    }
    return null;
  }

  protected updateModel() {
    const kvList: { key: string; value: string }[] = this.kvListFormGroup.get('keyVals').value;
    if (this.required && !kvList.length || !this.kvListFormGroup.valid) {
      this.propagateChange(null);
    } else {
      const keyValMap: { [key: string]: string } = {};
      kvList.forEach((entry) => {
        keyValMap[entry.key] = entry.value;
      });
      this.propagateChange(keyValMap);
    }
  }
}