import { describe, expect, it } from 'vitest'
import { ref } from 'vue'
import { useSelectionLimit } from '../../composables/useSelectionLimit'

describe('useSelectionLimit', () => {
  it('tracks unlimited selections', () => {
    const count = ref(4)
    const limit = useSelectionLimit({ count })

    expect(limit.isLimited.value).toBe(false)
    expect(limit.canAddMore.value).toBe(true)
    expect(limit.remaining.value).toBeUndefined()
    expect(limit.canAdd(100)).toBe(true)
  })

  it('tracks remaining capacity from reactive count and max values', () => {
    const count = ref(1)
    const max = ref<number | undefined>(3)
    const limit = useSelectionLimit({ count, max })

    expect(limit.isLimited.value).toBe(true)
    expect(limit.remaining.value).toBe(2)
    expect(limit.canAdd(2)).toBe(true)
    expect(limit.canAdd(3)).toBe(false)

    count.value = 3
    expect(limit.canAddMore.value).toBe(false)
    expect(limit.isAtLimit.value).toBe(true)

    max.value = undefined
    expect(limit.isLimited.value).toBe(false)
    expect(limit.canAdd(3)).toBe(true)
  })

  it('can evaluate a candidate count without mutating the current count', () => {
    const limit = useSelectionLimit({ count: 1, max: 3 })

    expect(limit.canAdd(1, 2)).toBe(true)
    expect(limit.canAdd(1, 3)).toBe(false)
  })
})