import { render } from '@testing-library/react';
import { describe, expect, it } from 'vitest';
import MDEditor from '@uiw/react-md-editor';
import rehypeSanitize from 'rehype-sanitize';
import { NoteCheckbox, isTaskLine, toggleTaskLine } from './note-task-list';

describe('note-task-list', () => {
  describe('isTaskLine', () => {
    it('erkennt gueltige Aufgabenzeilen', () => {
      expect(isTaskLine('- [ ] Milch')).toBe(true);
      expect(isTaskLine('- [x] Brot')).toBe(true);
      expect(isTaskLine('* [X] Eier')).toBe(true);
      expect(isTaskLine('+ [ ] Butter')).toBe(true);
      expect(isTaskLine('1. [ ] Mehl')).toBe(true);
      expect(isTaskLine('2) [x] Salz')).toBe(true);
      expect(isTaskLine('  - [ ] eingerueckt')).toBe(true);
      expect(isTaskLine('- [\t] Tab')).toBe(true);
    });

    it('lehnt Nicht-Aufgabenzeilen ab', () => {
      expect(isTaskLine('- [ ]')).toBe(false);
      expect(isTaskLine('- [ ]Text')).toBe(false);
      expect(isTaskLine('- Milch')).toBe(false);
      expect(isTaskLine('[ ] ohne Punkt')).toBe(false);
      expect(isTaskLine('- [y] falsch')).toBe(false);
      expect(isTaskLine('')).toBe(false);
    });
  });

  describe('toggleTaskLine', () => {
    it('kippt genau die Zeile am angegebenen Index auf [x]', () => {
      const content = '- [ ] Milch\n- [ ] Brot\n- [ ] Eier';
      expect(toggleTaskLine(content, 0)).toBe(
        '- [x] Milch\n- [ ] Brot\n- [ ] Eier',
      );
      expect(toggleTaskLine(content, 2)).toBe(
        '- [ ] Milch\n- [ ] Brot\n- [x] Eier',
      );
    });

    it('kippt [x]/[X] zurueck auf [ ]', () => {
      expect(toggleTaskLine('- [x] Brot', 0)).toBe('- [ ] Brot');
      expect(toggleTaskLine('- [X] Brot', 0)).toBe('- [ ] Brot');
    });

    it('zaehlt Nicht-Aufgabenzeilen nicht mit, alle anderen Zeilen bleiben unveraendert', () => {
      const content = '# Einkauf\n\nText\n- [ ] Milch\n- normal\n- [ ] Brot';
      const result = toggleTaskLine(content, 1);
      expect(result).toBe('# Einkauf\n\nText\n- [ ] Milch\n- normal\n- [x] Brot');
    });

    it('behaelt Einrueckung und Nummerierung bei', () => {
      const content = '- [ ] A\n  - [ ] B\n1. [ ] C';
      expect(toggleTaskLine(content, 1)).toBe('- [ ] A\n  - [x] B\n1. [ ] C');
      expect(toggleTaskLine(content, 2)).toBe('- [ ] A\n  - [ ] B\n1. [x] C');
    });

    it('gibt bei Index ausserhalb des Bereichs die unveraenderte Eingabe zurueck', () => {
      const content = '- [ ] A\n- [ ] B\n- [ ] C';
      expect(toggleTaskLine(content, -1)).toBe(content);
      expect(toggleTaskLine(content, 3)).toBe(content);
      expect(toggleTaskLine('', 0)).toBe('');
    });

    it('ueberspringt Zeilen innerhalb von Code-Zaeunen', () => {
      const withBackticks = '```\n- [ ] nicht\n```\n- [ ] echt';
      expect(toggleTaskLine(withBackticks, 0)).toBe(
        '```\n- [ ] nicht\n```\n- [x] echt',
      );

      const withTilde = '~~~\n- [ ] nicht\n~~~\n- [ ] echt';
      expect(toggleTaskLine(withTilde, 0)).toBe(
        '~~~\n- [ ] nicht\n~~~\n- [x] echt',
      );
    });
  });

  describe('echte Vorschau (MDEditor.Markdown + rehypeSanitize + components-Override)', () => {
    it('rendert genau die Aufgabenzeilen als anklickbare Kaestchen', () => {
      const SRC =
        '- [ ] eins\n- [x] zwei\n* [X] drei\n- [ ]\n- [ ]kein\n1. [ ] vier';

      const { container } = render(
        <MDEditor.Markdown
          source={SRC}
          rehypePlugins={[[rehypeSanitize]]}
          components={{ input: NoteCheckbox }}
        />,
      );

      const boxes = container.querySelectorAll('input[type="checkbox"]');
      const expectedCount = SRC.split('\n').filter(isTaskLine).length;

      expect(expectedCount).toBe(4);
      expect(boxes.length).toBe(4);

      for (const box of Array.from(boxes)) {
        expect((box as HTMLInputElement).disabled).toBe(false);
      }

      expect((boxes[0] as HTMLInputElement).checked).toBe(false);
      expect((boxes[1] as HTMLInputElement).checked).toBe(true);
      expect((boxes[2] as HTMLInputElement).checked).toBe(true);
      expect((boxes[3] as HTMLInputElement).checked).toBe(false);
    });
  });
});