import { describe, it, expect } from 'vitest'
import {
  DiscogsClient,
  DiscogsAuthError,
  DiscogsRateLimitError,
  mapSearchResult,
  mapRelease,
} from '../src/discogs.js'
import { discogsSearchFixture, discogsReleaseFixture } from './fixtures.js'

function jsonResponse(body: unknown, status = 200): Response {
  return new Response(JSON.stringify(body), {
    status,
    headers: { 'content-type': 'application/json' },
  })
}

function stubFetch(routes: (url: string, init?: any) => Response): typeof fetch {
  return (async (input: any, init?: any) => routes(String(input), init)) as typeof fetch
}

describe('DiscogsClient', () => {
  it('searches by barcode with token and maps results', async () => {
    const seen: string[] = []
    const seenAuth: string[] = []
    const c = new DiscogsClient(
      'testtoken',
      stubFetch((_url, init) => {
        seen.push(_url)
        seenAuth.push(String(new Headers(init?.headers).get('Authorization')))
        return jsonResponse(discogsSearchFixture)
      })
    )
    const results = await c.searchByBarcode('5021592210629')
    expect(seen[0]).toContain('/database/search')
    expect(seen[0]).toContain('barcode=5021592210629')
    expect(seen[0]).toContain('type=release')
    expect(seenAuth[0]).toBe('Discogs token=testtoken')
    expect(results).toHaveLength(2)
    expect(results[0]).toEqual({
      id: 1001,
      artist: 'The Cinematic Orchestra',
      title: 'Motion',
      year: 1999,
      formats: ['CD', 'Album'],
      labels: ['Ninja Tune'],
      country: 'UK',
      catno: 'ZENCD012',
      thumbUrl: 'https://img.discogs.com/small1.jpg',
    })
  })

  it('searches by text with optional format filter', async () => {
    const seen: string[] = []
    const c = new DiscogsClient(
      't',
      stubFetch((url) => {
        seen.push(url)
        return jsonResponse(discogsSearchFixture)
      })
    )
    await c.searchByText('motion', 'Vinyl')
    expect(seen[0]).toContain('q=motion')
    expect(seen[0]).toContain('format=Vinyl')
  })

  it('throws DiscogsAuthError on 401', async () => {
    const c = new DiscogsClient('bad', stubFetch(() => jsonResponse({ message: 'bad' }, 401)))
    await expect(c.searchByBarcode('123')).rejects.toBeInstanceOf(DiscogsAuthError)
  })

  it('throws DiscogsRateLimitError on 429', async () => {
    const c = new DiscogsClient('t', stubFetch(() => jsonResponse({}, 429)))
    await expect(c.searchByBarcode('123')).rejects.toBeInstanceOf(DiscogsRateLimitError)
  })

  it('fetches full release with barcode identifiers', async () => {
    const c = new DiscogsClient(
      't',
      stubFetch((url) => {
        expect(url).toContain('/releases/1001')
        return jsonResponse(discogsReleaseFixture)
      })
    )
    const release = await c.getRelease(1001)
    expect(release.title).toBe('Motion')
    expect(release.barcodes).toEqual(['5021592210629'])
    expect(release.coverUrl).toBe('https://img.discogs.com/full1.jpg')
  })
})

describe('mappers', () => {
  it('splits search title into artist/title and parses year', () => {
    const first = discogsSearchFixture.results[0]!
    const mapped = mapSearchResult(first)
    expect(mapped.artist).toBe('The Cinematic Orchestra')
    expect(mapped.title).toBe('Motion')
    expect(mapped.year).toBe(1999)
  })

  it('maps full release', () => {
    const mapped = mapRelease(discogsReleaseFixture)
    expect(mapped.formats).toEqual(['CD'])
    expect(mapped.labels).toEqual(['Ninja Tune'])
    expect(mapped.tracklist).toEqual([
      { position: '1', title: 'Overture' },
      { position: '2', title: 'Theme de Yoyo' },
    ])
  })

  it('does not throw on malformed payloads', () => {
    expect(() => mapSearchResult(null)).not.toThrow()
    expect(() => mapRelease(undefined)).not.toThrow()
    expect(mapRelease({ tracklist: [null, { title: 'X' }] }).tracklist).toEqual([{ position: '', title: 'X' }])
    expect(mapSearchResult({ format: [null, 'CD'] }).formats).toEqual(['CD'])
    expect(new DiscogsAuthError().name).toBe('DiscogsAuthError')
    expect(new DiscogsRateLimitError().name).toBe('DiscogsRateLimitError')
  })
})