import { describe, expect, it } from 'vitest'
import {
  DEFERRED_TOPOLOGY_EDGE_KINDS,
  DESIGNER_EDGE_KINDS,
  edgeKindNeedsGroupKey,
  resolveDependencyEndpoints,
} from './gateGraphTopology.js'

describe('gateGraphTopology', () => {
  it('includes topology kinds in designer', () => {
    expect(DESIGNER_EDGE_KINDS).toContain('requires')
    expect(DESIGNER_EDGE_KINDS).toContain('parallel_group')
    expect(DESIGNER_EDGE_KINDS).toContain('optional_branch')
    for (const kind of DEFERRED_TOPOLOGY_EDGE_KINDS) {
      expect(DESIGNER_EDGE_KINDS).toContain(kind)
    }
  })

  it('requires group_key for parallel_group', () => {
    expect(edgeKindNeedsGroupKey('parallel_group')).toBe(true)
    expect(edgeKindNeedsGroupKey('requires')).toBe(false)
  })

  it('resolves requires edge direction for join semantics', () => {
    expect(resolveDependencyEndpoints('requires', 'a', 'b')).toEqual({
      from_item_id: 'b',
      to_item_id: 'a',
    })
    expect(resolveDependencyEndpoints('optional_branch', 'a', 'b')).toEqual({
      from_item_id: 'a',
      to_item_id: 'b',
    })
  })
})