/**
 * Copyright since 2025 Mifos Initiative
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

/** Angular Imports */
import { Component, OnInit, inject } from '@angular/core';
import {
  MatDialogRef,
  MAT_DIALOG_DATA,
  MatDialogTitle,
  MatDialogActions,
  MatDialogClose
} from '@angular/material/dialog';
import { MatTooltip } from '@angular/material/tooltip';
import { UntypedFormGroup, UntypedFormBuilder, Validators, ReactiveFormsModule } from '@angular/forms';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
import { minWordsValidator } from 'app/shared/validators/min-words.validator';

@Component({
  selector: 'mifosx-edit-notes-dialog',
  templateUrl: './edit-notes-dialog.component.html',
  styleUrls: ['./edit-notes-dialog.component.scss'],
  imports: [
    ...STANDALONE_SHARED_IMPORTS,
    MatDialogTitle,
    MatDialogActions,
    MatDialogClose,
    MatTooltip
  ]
})
export class EditNotesDialogComponent implements OnInit {
  dialogRef = inject<MatDialogRef<EditNotesDialogComponent>>(MatDialogRef);
  private formBuilder = inject(UntypedFormBuilder);
  data = inject(MAT_DIALOG_DATA);

  noteForm: UntypedFormGroup;

  ngOnInit() {
    this.createNoteForm();
  }

  createNoteForm() {
    this.noteForm = this.formBuilder.group({
      // Same rule as the entity-notes Add form — reject whitespace / single-word.
      note: [
        this.data.noteContent,
        [
          Validators.required,
          minWordsValidator(2)
        ]
      ]
    });
  }

  /** Block whitespace at position 0 of an otherwise-empty textarea. */
  onNoteKeyDown(event: KeyboardEvent): void {
    if (event.key !== ' ' && event.key !== 'Tab' && event.key !== 'Enter') return;
    const el = event.target as HTMLTextAreaElement;
    if (el.selectionStart === 0 && el.value.trim() === '') {
      event.preventDefault();
    }
  }

  /** Strip leading whitespace + collapse internal runs of spaces/tabs. */
  onNoteInput(event: Event): void {
    const el = event.target as HTMLTextAreaElement;
    const before = el.value;
    const after = before.replace(/^[ \t]+/, '').replace(/[ \t]{2,}/g, ' ');
    if (before !== after) {
      const cursorDelta = before.length - after.length;
      const pos = Math.max(0, (el.selectionStart ?? after.length) - cursorDelta);
      el.value = after;
      this.noteForm.get('note')!.setValue(after, { emitEvent: false });
      el.setSelectionRange(pos, pos);
    }
  }
}