import { describe, it, expect } from 'vitest'
import { openDatabase } from '../src/db.js'
import { buildTestAppWithDb, setupAdmin, auth } from './helpers.js'

function seedItems(db: ReturnType<typeof openDatabase>) {
  const ins = db.prepare(
    `INSERT INTO collection_items (user_id, discogs_release_id, title, artist, year, formats, genres, date_added, rip_override)
     VALUES (1, ?, ?, ?, ?, ?, ?, ?, ?)`
  )
  ins.run(1, 'Motion', 'The Cinematic Orchestra', 1999, JSON.stringify(['CD']), JSON.stringify(['Electronic']), '2026-08-01 10:00:00', null)
  ins.run(2, 'Blue Lines', 'Massive Attack', 1991, JSON.stringify(['Vinyl']), JSON.stringify(['Electronic']), '2026-08-15 10:00:00', 1)
  ins.run(3, 'Mezzanine', 'Massive Attack', 1998, JSON.stringify(['CD']), JSON.stringify(['Downtempo', 'Electronic']), '2026-08-20 10:00:00', null)
  ins.run(4, 'Dummy', 'Portishead', 1994, JSON.stringify(['CD', 'Album']), JSON.stringify(['Downtempo']), '2025-09-01 10:00:00', null)
  db.prepare("INSERT INTO loans (user_id, item_id, borrower) VALUES (1, 2, 'Bob')").run()
}

describe('GET /api/stats', () => {
  it('aggregates totals, formats, genres, artists, months, ratio, loans', async () => {
    const db = openDatabase(':memory:')
    const app = await buildTestAppWithDb(db)
    const cookie = await setupAdmin(app)
    // seed after setup so user_id 1 (admin) exists and FKs hold
    seedItems(db)
    const res = await app.inject({ method: 'GET', url: '/api/stats', ...auth(cookie) })
    expect(res.statusCode).toBe(200)
    const s = res.json()
    // only Blue Lines has rip_override=1; no digital albums/match_links → ripped=1, notRipped=3
    expect(s.totals).toEqual({ items: 4, ripped: 1, notRipped: 3, onLoan: 1 })
    expect(s.ripRatio).toBeCloseTo(0.25)
    expect(s.formats).toEqual([
      { name: 'CD', count: 3 },
      { name: 'Vinyl', count: 1 },
      { name: 'Album', count: 1 },
    ])
    expect(s.topGenres.slice(0, 2)).toEqual([
      { name: 'Electronic', count: 3 },
      { name: 'Downtempo', count: 2 },
    ])
    // Massive Attack (2) leads; Cinematic Orchestra and Portishead both 1 → assert lead + total only
    expect(s.topArtists).toHaveLength(3)
    expect(s.topArtists[0]).toEqual({ name: 'Massive Attack', count: 2 })
    // 2026-08 items: Motion, Blue Lines, Mezzanine (Dummy 2025-09 is outside the 12-month window)
    const aug = s.addedByMonth.find((m: { month: string }) => m.month === '2026-08')
    expect(aug).toEqual({ month: '2026-08', count: 3 })
    await app.close()
  })
})