import {
  toXString,
  getFieldNames,
  XExceptionIDs,
  nameofInstance,
  isNullOrUndefined,
  isNullOrEmptyString,
} from 'x-framework-core';
import {
  XReferenceDto,
  defaultReferenceDto,
  prepareReferenceDtoFields,
} from 'x-saherelm-api-sdk';
import {
  VReferencePresentType,
  isVReferencePresentType,
  VReferencePresentTypeIdentifier,
} from './v-reference.typings';
import {
  VBaseDtoComponent,
  VModelFieldDescriptor,
  VModelValidationResult,
} from '../v-dto/v-dto.typings';
import { Component, Input } from '@angular/core';

@Component({
  selector: 'v-reference',
  templateUrl: './v-reference.component.html',
  styleUrls: ['./v-reference.component.scss'],
})
export class VReferenceComponent extends VBaseDtoComponent<XReferenceDto<any>> {
  //
  //#region Props ...
  readonly defaultModel: XReferenceDto<any> = {
    ...defaultReferenceDto,
  };
  readonly FieldNames = getFieldNames(this.defaultModel);
  readonly ReferencePresentTypes = Object.assign({}, VReferencePresentType);

  //
  @Input()
  presentType: VReferencePresentTypeIdentifier =
    this.ReferencePresentTypes.AsView;

  //
  defaultFieldDescriptors: VModelFieldDescriptor<any>[] = [
    //
    // Index ...
    {
      hide: false,
      hideLabel: false,
      allowFieldForm: false,
      key: this.FieldNames.index,
      value: this.defaultModel.index,
      label: this.AppResourceIDs.index,
      type: this.ModelFieldTypes.Number,
      valueProvider: (value) => {
        return this.applyLocale(value);
      },
    } as VModelFieldDescriptor<number>,
    //
    // ProvidedFor ...
    {
      hide: false,
      hideLabel: false,
      allowFieldForm: false,
      key: this.FieldNames.providedFor,
      type: this.ModelFieldTypes.String,
      value: this.defaultModel.providedFor,
      label: this.AppResourceIDs.provided_for,
    } as VModelFieldDescriptor<string>,
    //
    // ReferenceTo ...
    {
      hide: false,
      hideLabel: false,
      allowFieldForm: false,
      key: this.FieldNames.referencedTo,
      type: this.ModelFieldTypes.String,
      value: this.defaultModel.referencedTo,
      label: this.AppResourceIDs.referenced_to,
      valueProvider: (value) => {
        return toXString(value);
      },
    } as VModelFieldDescriptor<any>,
  ];
  //#endregion

  //
  //#region LifeCycles ...
  onChange(changeKeys: string[]): void {
    super.onChange(changeKeys);

    //
    let isChanged = false;
    let applyChanges = false;

    //
    // Present Type ...
    isChanged = changeKeys.includes(nameofInstance(this, 'presentType'));
    if (isChanged) {
      //
      if (!isVReferencePresentType(this.presentType)) {
        //
        applyChanges = true;
        this.presentType = this.ReferencePresentTypes.AsView;
      }
    }

    //
    if (applyChanges) {
      this.detectChanges();
    }
  }
  //#endregion

  //
  //#region Abstraction ...
  /**
   * Prepare Model Fields ...
   *
   * @param model
   * @returns
   */
  prepare(model?: XReferenceDto<any>): XReferenceDto<any> {
    return prepareReferenceDtoFields(model);
  }

  /**
   * Handle Model Validation ...
   *
   * @param model
   * @returns
   */
  validate(
    model?: Partial<XReferenceDto<any>>,
  ): VModelValidationResult<XReferenceDto<any>> {
    //
    let result: VModelValidationResult<XReferenceDto<any>> = undefined;

    //
    let isValid = false;
    const validationErrors: string[] = [];

    //
    model = {
      ...this.model,
      ...model,
    };
    const normalized = this.normalize(model);

    //
    // Handle Validation ...
    isValid =
      !isNullOrUndefined(normalized) && !this.isSameAsDefault(normalized);
    if (!isValid) {
      //
      validationErrors.push(
        this.getExceptionMessage(XExceptionIDs.InvalidArgs),
      );
    } else {
      //
      // Check Other Validations ...

      //
      // Index ...
      isValid = !isNullOrUndefined(normalized.index) && normalized.index >= 0;
      if (!isValid) {
        //
        validationErrors.push(
          `${this.resourceProvider(
            this.AppResourceIDs.index,
          )}: ${this.getExceptionMessage(XExceptionIDs.InvalidArgs)}`,
        );
      }

      //
      // ProvidedFor ...
      isValid = !isNullOrEmptyString(normalized.providedFor);
      if (!isValid) {
        //
        validationErrors.push(
          `${this.resourceProvider(
            this.AppResourceIDs.provided_for,
          )}: ${this.getExceptionMessage(XExceptionIDs.InvalidArgs)}`,
        );
      }

      //
      // ReferenceTo ...
      isValid = !isNullOrUndefined(normalized.referencedTo);
      if (!isValid) {
        //
        validationErrors.push(
          `${this.resourceProvider(
            this.AppResourceIDs.referenced_to,
          )}: ${this.getExceptionMessage(XExceptionIDs.InvalidArgs)}`,
        );
      }
    }

    //
    // Handle Result ...

    //
    isValid = !this.hasChild(validationErrors);

    //
    const isValidForAdd =
      isNullOrUndefined(normalized.index) || normalized.index < 0;
    const isValidForUpdate =
      !isNullOrUndefined(normalized.index) && normalized.index > 0;

    //
    result = {
      isValid,
      normalized,
      isValidForAdd,
      isValidForUpdate,
      validationErrors,
    };

    //
    return result;
  }
  //#endregion
}