import { describe, expect, it } from 'vitest';
import { findBestMatch } from './match';

const target = { title: 'Midnight City', artist: 'M83', durationMs: 243_000 };

describe('findBestMatch', () => {
  it('prefers the exact title with a matching duration', () => {
    const best = findBestMatch(
      [
        { id: 'remix', title: 'Midnight City (Eric Prydz Remix)', artist: 'M83', durationMs: 400_000 },
        { id: 'cover', title: 'Midnight City', artist: 'Party Machine', durationMs: 243_000 },
        { id: 'real', title: 'Midnight City', artist: 'M83', durationMs: 244_000 },
      ],
      target,
    );
    expect(best?.id).toBe('real');
  });

  it('rejects other artists even with the same title', () => {
    expect(findBestMatch([{ title: 'Midnight City', artist: 'Some Cover Band' }], target)).toBeNull();
  });

  it('rejects durations more than 15s apart', () => {
    expect(findBestMatch([{ title: 'Midnight City', artist: 'M83', durationMs: 300_000 }], target)).toBeNull();
  });

  it('matches when either side lacks a duration', () => {
    expect(findBestMatch([{ title: 'Midnight City', artist: 'M83' }], { title: 'Midnight City', artist: 'M83' })).not.toBeNull();
  });

  it('tolerates featured-artist and remaster suffixes', () => {
    const best = findBestMatch([{ title: 'Midnight City - Remastered', artist: 'M83, Someone' }], target);
    expect(best).not.toBeNull();
  });
});