import { describe, it, expect } from 'vitest'
import { parseConflicts, resolveConflicts } from '../src/utils/git-conflict-resolver.js'

const CONFLICT_TEXT = `import { foo } from './foo'
<<<<<<< HEAD
const x = 1
=======
const x = 2
>>>>>>> feature
export { x }`

describe('git-conflict-resolver', () => {
  it('parses conflicts', () => {
    const conflicts = parseConflicts(CONFLICT_TEXT)
    expect(conflicts.length).toBe(1)
    expect(conflicts[0].ours).toBe('const x = 1')
    expect(conflicts[0].theirs).toBe('const x = 2')
    expect(conflicts[0].header).toBe('HEAD')
  })

  it('auto-resolves with ours strategy', () => {
    const result = resolveConflicts(CONFLICT_TEXT, 'ours')
    expect(result.success).toBe(true)
    expect(result.resolution).toContain('const x = 1')
    expect(result.resolution).not.toContain('<<<<<<<')
  })

  it('auto-resolves with theirs strategy', () => {
    const result = resolveConflicts(CONFLICT_TEXT, 'theirs')
    expect(result.success).toBe(true)
    expect(result.resolution).toContain('const x = 2')
  })

  it('detects no conflicts', () => {
    const result = resolveConflicts('no conflict here')
    expect(result.success).toBe(false)
    expect(result.explanation).toContain('No git conflict markers')
  })

  it('handles multiple conflicts', () => {
    const multi = `${CONFLICT_TEXT}\n\n${CONFLICT_TEXT.replace('x', 'y')}`
    const result = resolveConflicts(multi, 'ours')
    expect(result.success).toBe(true)
    expect(result.conflictCount).toBe(2)
  })
})