import { describe, it, expect } from 'vitest'
import { normalize, isConfidentMatch, candidateAlbums } from '../src/matcher.js'

describe('normalize', () => {
  it('lowercases, strips punctuation, articles, accents, extra whitespace', () => {
    expect(normalize('The Cinematic Orchestra!')).toBe('cinematic orchestra')
    expect(normalize('  Blur: The Best   of… ')).toBe('blur best of')
    expect(normalize('Björk — Début')).toBe('bjork debut')
    expect(normalize('A Tribe Called Quest')).toBe('tribe called quest')
    expect(normalize('Ænima')).toBe('aenima')
  })
})

describe('isConfidentMatch', () => {
  it('matches when normalized artist AND title are equal', () => {
    expect(
      isConfidentMatch(
        { title: 'Motion!', artist: 'The Cinematic Orchestra' },
        { title: 'Motion', artist: 'Cinematic Orchestra' }
      )
    ).toBe(true)
    expect(
      isConfidentMatch(
        { title: 'Motion', artist: 'Massive Attack' },
        { title: 'Motion', artist: 'The Cinematic Orchestra' }
      )
    ).toBe(false)
    expect(
      isConfidentMatch(
        { title: 'Blue Lines', artist: 'Massive Attack' },
        { title: 'Motion', artist: 'Massive Attack' }
      )
    ).toBe(false)
  })
})

describe('candidateAlbums', () => {
  const albums = [
    { id: 1, title: 'Motion', artist: 'Someone Else' },
    { id: 2, title: 'Motion', artist: 'The Cinematic Orchestra' },
    { id: 3, title: 'Other Album', artist: 'The Cinematic Orchestra' },
  ]

  it('returns same-title albums with artist matches first', () => {
    const candidates = candidateAlbums(
      { title: 'Motion', artist: 'Cinematic Orchestra' },
      albums
    )
    expect(candidates.map((c) => c.id)).toEqual([2, 1])
  })

  it('caps candidates at 20', () => {
    const many = Array.from({ length: 50 }, (_, i) => ({
      id: i,
      title: 'Motion',
      artist: `Artist ${i}`,
    }))
    expect(candidateAlbums({ title: 'Motion', artist: 'zzz' }, many)).toHaveLength(20)
  })
})