import { describe, expect, it } from 'vitest';

import type { ComparisonRow } from '@tool.io/tools/compare';
import { filterComparisonRows } from './comparison-filter';

const row = (
	attributeId: string,
	hasDifference: boolean,
	missing: boolean
): ComparisonRow => ({
	attributeId,
	cells: [
		{
			comparison: missing ? 'missing' : 'equal',
			display: missing ? '—' : 'Value',
			itemId: 'first',
			missingReason: missing ? 'unknown' : null,
			normalizedValue: missing ? null : 'Value',
			status: missing ? null : 'known'
		},
		{
			comparison: hasDifference ? 'different' : 'equal',
			display: 'Value',
			itemId: 'second',
			missingReason: null,
			normalizedValue: 'Value',
			status: 'known'
		}
	],
	description: '',
	hasDifference,
	label: attributeId,
	preference: 'none'
});

const rows = [
	row('equal', false, false),
	row('different', true, false),
	row('missing', true, true)
];

describe('comparison row filters', () => {
	it('shows the complete union in all mode', () => {
		expect(filterComparisonRows(rows, 'all')).toHaveLength(3);
	});

	it('shows changed and missing rows in differences mode', () => {
		expect(
			filterComparisonRows(rows, 'different').map(
				(entry) => entry.attributeId
			)
		).toEqual(['different', 'missing']);
	});

	it('shows only attributes present on every item in shared mode', () => {
		expect(
			filterComparisonRows(rows, 'shared').map(
				(entry) => entry.attributeId
			)
		).toEqual(['equal', 'different']);
	});
});