import { cleanMarkdownNbsp } from './cleanMarkdownNbsp';

describe('cleanMarkdownNbsp', () => {
	it('should return unchanged text if no   is present', () => {
		const input = '# Heading\n\nSome paragraph\n\n- [ ] Todo item';
		expect(cleanMarkdownNbsp(input)).toBe(input);
	});

	it('should clean standalone   lines between paragraphs and items', () => {
		const input = [
			'jjjj',
			'',
			' ',
			'',
			'jjj',
			'',
			'![Freehand Drawing.svg](joplin-content://resource/123.svg)',
			'',
			' ',
			'',
			'- [x] 2026/11/01 16:24',
		].join('\n');

		const expected = [
			'jjjj',
			'',
			'jjj',
			'',
			'![Freehand Drawing.svg](joplin-content://resource/123.svg)',
			'',
			'- [x] 2026/11/01 16:24',
		].join('\n');

		expect(cleanMarkdownNbsp(input)).toBe(expected);
	});

	it('should clean multiple contiguous or spaced   entities and variants ( ,  )', () => {
		const input = [
			'Section 1',
			'  ',
			'Section 2',
			'           ',
			'Section 3',
			' ',
			'Section 4',
			' ',
			'Section 5',
		].join('\n');

		const expected = [
			'Section 1',
			'',
			'Section 2',
			'',
			'Section 3',
			'',
			'Section 4',
			'',
			'Section 5',
		].join('\n');

		expect(cleanMarkdownNbsp(input)).toBe(expected);
	});

	it('should preserve inline   inside text and table cells', () => {
		const text = 'Hello world with inline nonbreaking space.';
		expect(cleanMarkdownNbsp(text)).toBe(text);

		const table = '| Header 1 | Header 2 |\n| --- | --- |\n|   | Value |';
		expect(cleanMarkdownNbsp(table)).toBe(table);
	});

	it('should preserve inline backtick code spans like ` `', () => {
		const text = 'Use ` ` for non-breaking space in HTML.';
		expect(cleanMarkdownNbsp(text)).toBe(text);
	});

	it('should preserve   inside fenced code blocks', () => {
		const codeBlock = [
			'```html',
			' ',
			'<div>&nbsp;</div>',
			'```',
		].join('\n');

		expect(cleanMarkdownNbsp(codeBlock)).toBe(codeBlock);

		const tildeCodeBlock = [
			'~~~html',
			'&nbsp;',
			'~~~',
		].join('\n');

		expect(cleanMarkdownNbsp(tildeCodeBlock)).toBe(tildeCodeBlock);
	});

	it('should handle consecutive &nbsp; lines cleanly', () => {
		const input = 'Paragraph 1\n\n&nbsp;\n\n&nbsp;\n\nParagraph 2';
		const expected = 'Paragraph 1\n\nParagraph 2';
		expect(cleanMarkdownNbsp(input)).toBe(expected);
	});

	it('should support Windows CRLF line endings', () => {
		const input = 'Line 1\r\n\r\n&nbsp;\r\n\r\nLine 2';
		const expected = 'Line 1\r\n\r\nLine 2';
		expect(cleanMarkdownNbsp(input)).toBe(expected);
	});
});