import { beforeEach, describe, expect, it } from 'vitest'
import {
  clearGuidePerformanceRecords,
  getGuidePerformanceRecords,
  getGuidePerformanceSummary,
  startGuidePerformance
} from '@/services/performance/guidePerformance'

describe('guidePerformance', () => {
  beforeEach(() => {
    clearGuidePerformanceRecords()
  })

  it('summarizes operation latency and API cache hit rate without start records', () => {
    const cached = startGuidePerformance('api', 'GET /manifest')
    cached('cache-hit')
    const network = startGuidePerformance('api', 'GET /manifest')
    network('success')
    const route = startGuidePerformance('interaction', 'route-plan')
    route('failure')

    expect(getGuidePerformanceSummary()).toEqual(expect.objectContaining({
      operationCount: 3,
      apiCacheHitCount: 1,
      apiNetworkRequestCount: 1,
      apiCacheHitRate: 0.5,
      operations: expect.arrayContaining([
        expect.objectContaining({
          kind: 'api',
          name: 'GET /manifest',
          count: 2,
          cacheHitCount: 1,
          successCount: 1
        }),
        expect.objectContaining({
          kind: 'interaction',
          name: 'route-plan',
          failureCount: 1
        })
      ])
    }))
  })

  it('records a start and cache-hit completion for a measured operation', () => {
    const finish = startGuidePerformance('api', 'GET /gis/sdk/maps/1/manifest')
    finish('cache-hit', { layer: 'persistent' })

    expect(getGuidePerformanceRecords()).toEqual([
      expect.objectContaining({
        kind: 'api',
        name: 'GET /gis/sdk/maps/1/manifest',
        outcome: 'start'
      }),
      expect.objectContaining({
        kind: 'api',
        name: 'GET /gis/sdk/maps/1/manifest',
        outcome: 'cache-hit',
        detail: { layer: 'persistent' }
      })
    ])
  })
})