import { describe, it, expect } from 'vitest'
import { playerReducer } from './playerReducer'
import { PLAYER_REFRESH_QUEUE } from '../actions'

describe('playerReducer', () => {
  describe('PLAYER_REFRESH_QUEUE', () => {
    it('clamps negative savedPlayIndex to 0', () => {
      const state = {
        queue: [
          { trackId: 'song-1', musicSrc: 'old-url', uuid: 'a' },
          { trackId: 'song-2', musicSrc: 'old-url', uuid: 'b' },
        ],
        savedPlayIndex: -1,
        current: {},
        clear: false,
        volume: 1,
      }
      const action = { type: PLAYER_REFRESH_QUEUE, data: {} }
      const result = playerReducer(state, action)
      expect(result.playIndex).toBe(0)
    })

    it('preserves valid savedPlayIndex', () => {
      const state = {
        queue: [
          { trackId: 'song-1', musicSrc: 'old-url', uuid: 'a' },
          { trackId: 'song-2', musicSrc: 'old-url', uuid: 'b' },
        ],
        savedPlayIndex: 1,
        current: {},
        clear: false,
        volume: 1,
      }
      const action = { type: PLAYER_REFRESH_QUEUE, data: {} }
      const result = playerReducer(state, action)
      expect(result.playIndex).toBe(1)
    })

    it('uses savedPlayIndex of 0 correctly', () => {
      const state = {
        queue: [{ trackId: 'song-1', musicSrc: 'old-url', uuid: 'a' }],
        savedPlayIndex: 0,
        current: {},
        clear: false,
        volume: 1,
      }
      const action = { type: PLAYER_REFRESH_QUEUE, data: {} }
      const result = playerReducer(state, action)
      expect(result.playIndex).toBe(0)
    })
  })
})