/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {formControlNameExample, formGroupNameExample, ngModelGroupExample, ngModelWithFormGroupExample} from './error_examples';


export function modelParentException(): Error {
  return new Error(`
    ngModel cannot be used to register form controls with a parent formGroup directive.  Try using
    formGroup's partner directive "formControlName" instead.  Example:

    ${formControlNameExample}

    Or, if you'd like to avoid registering this form control, indicate that it's standalone in ngModelOptions:

    Example:

    ${ngModelWithFormGroupExample}`);
}

export function formGroupNameException(): Error {
  return new Error(`
    ngModel cannot be used to register form controls with a parent formGroupName or formArrayName directive.

    Option 1: Use formControlName instead of ngModel (reactive strategy):

    ${formGroupNameExample}

    Option 2:  Update ngModel's parent be ngModelGroup (template-driven strategy):

    ${ngModelGroupExample}`);
}

export function missingNameException(): Error {
  return new Error(
      `If ngModel is used within a form tag, either the name attribute must be set or the form
    control must be defined as 'standalone' in ngModelOptions.

    Example 1: <input [(ngModel)]="person.firstName" name="first">
    Example 2: <input [(ngModel)]="person.firstName" [ngModelOptions]="{standalone: true}">`);
}

export function modelGroupParentException(): Error {
  return new Error(`
    ngModelGroup cannot be used with a parent formGroup directive.

    Option 1: Use formGroupName instead of ngModelGroup (reactive strategy):

    ${formGroupNameExample}

    Option 2:  Use a regular form tag instead of the formGroup directive (template-driven strategy):

    ${ngModelGroupExample}`);
}