import { describe, expect, it } from 'vitest'
import {
  OUTDOOR_BUILDING_EXIT_ZOOM,
  OUTDOOR_BUILDING_ENTRY_ZOOM,
  canEnterBuildingSemanticMap,
  distanceBetweenCoordinatesMeters,
  hasReachedOutdoorExitBoundary
} from '@/domain/guideSemanticZoom'

const museum = { latitude: 22.692763, longitude: 114.363572 }

describe('guide semantic zoom', () => {
  it('uses a stable outdoor extent below the building-entry threshold', () => {
    expect(OUTDOOR_BUILDING_EXIT_ZOOM).toBeLessThan(OUTDOOR_BUILDING_ENTRY_ZOOM)
  })

  it('starts the outdoor handoff before the 3D camera reaches its hard zoom clamp', () => {
    expect(hasReachedOutdoorExitBoundary(92, 100)).toBe(true)
    expect(hasReachedOutdoorExitBoundary(91.9, 100)).toBe(false)
    expect(hasReachedOutdoorExitBoundary(0, 0)).toBe(false)
  })

  it('enters the building only when the museum is centered at the entry zoom', () => {
    expect(canEnterBuildingSemanticMap({
      ...museum,
      zoom: OUTDOOR_BUILDING_ENTRY_ZOOM
    }, museum)).toBe(true)
  })

  it('does not enter the building when the outdoor map has not been zoomed in enough', () => {
    expect(canEnterBuildingSemanticMap({
      ...museum,
      zoom: OUTDOOR_BUILDING_ENTRY_ZOOM - 0.1
    }, museum)).toBe(false)
  })

  it('does not switch for a similarly zoomed but unrelated outdoor location', () => {
    expect(canEnterBuildingSemanticMap({
      latitude: 22.698,
      longitude: 114.37,
      zoom: OUTDOOR_BUILDING_ENTRY_ZOOM + 1
    }, museum)).toBe(false)
  })

  it('calculates a usable geographic distance for the focus guard', () => {
    expect(distanceBetweenCoordinatesMeters(museum, museum)).toBe(0)
    expect(distanceBetweenCoordinatesMeters(museum, {
      latitude: 22.693763,
      longitude: 114.363572
    })).toBeGreaterThan(100)
  })
})