import { describe, expect, it } from 'vitest'
import { isNewerVersion, nextDevVersion } from '../version.js'

describe('nextDevVersion — 4.x finish-version-bumping (from the RELEASED version)', () => {
  it('release bumps minor and resets patch', () => {
    expect(nextDevVersion('5.1.0', 'release')).toBe('5.2.0')
    expect(nextDevVersion('5.0.0', 'release')).toBe('5.1.0')
    expect(nextDevVersion('4.81.0', 'release')).toBe('4.82.0')
  })

  it('hotfix bumps patch by TWO (patch+1 consumed by the tag, +1 free for next hotfix)', () => {
    expect(nextDevVersion('5.0.1', 'hotfix')).toBe('5.0.3')
    expect(nextDevVersion('5.0.0', 'hotfix')).toBe('5.0.2')
    expect(nextDevVersion('4.81.4', 'hotfix')).toBe('4.81.6')
  })

  it('strips a leading v', () => {
    expect(nextDevVersion('v5.1.0', 'release')).toBe('5.2.0')
    expect(nextDevVersion('v5.0.1', 'hotfix')).toBe('5.0.3')
  })

  it('treats unknown branch types like a release (minor bump)', () => {
    expect(nextDevVersion('5.1.0', 'other')).toBe('5.2.0')
  })

  it('is defensive against short/partial versions', () => {
    expect(nextDevVersion('5', 'release')).toBe('5.1.0') // 5.0.0 → minor+1
    expect(nextDevVersion('5.2', 'hotfix')).toBe('5.2.2') // 5.2.0 → patch+2
  })
})

describe('isNewerVersion — a version bump never goes backwards', () => {
  it('orders numerically, not lexically', () => {
    expect(isNewerVersion('5.20.0', '5.19.4')).toBe(true)
    expect(isNewerVersion('5.9.0', '5.10.0')).toBe(false)
    expect(isNewerVersion('5.19.4', '5.19.2')).toBe(true)
  })

  it('is false on equality — nothing to bump', () => {
    expect(isNewerVersion('5.20.0', '5.20.0')).toBe(false)
  })

  it('guards the hotfix-after-develop-moved-on case', () => {
    // A hotfix on 5.19.2 derives 5.19.4, but develop already sits at 5.20.0:
    // writing it would rewind develop and make the next release republish a
    // number npm already has.
    expect(isNewerVersion(nextDevVersion('5.19.2', 'hotfix'), '5.20.0')).toBe(false)
    // The normal case still bumps.
    expect(isNewerVersion(nextDevVersion('5.20.0', 'release'), '5.20.0')).toBe(true)
  })

  it('tolerates a leading v and short forms', () => {
    expect(isNewerVersion('v5.21.0', '5.20.0')).toBe(true)
    expect(isNewerVersion('5.20', '5.19.9')).toBe(true)
  })
})