/**
 * Quality Dashboard Tests
 *
 * Tests for the BQAS Quality Dashboard components and API integration
 */

describe('Quality Dashboard', () => {
  describe('Page Structure', () => {
    it('should have the quality page file', () => {
      const fs = require('fs')
      const path = require('path')

      const pagePath = path.join(__dirname, '../app/admin/quality/page.tsx')
      expect(fs.existsSync(pagePath)).toBe(true)
    })

    it('should have navigation entry in AdminLayout', () => {
      const fs = require('fs')
      const path = require('path')

      const layoutPath = path.join(__dirname, '../components/admin/AdminLayout.tsx')
      const content = fs.readFileSync(layoutPath, 'utf-8')

      expect(content).toContain("name: 'Qualitaet'")
      expect(content).toContain("href: '/admin/quality'")
    })
  })

  describe('API Types', () => {
    interface TestResult {
      test_id: string
      test_name: string
      passed: boolean
      composite_score: number
      intent_accuracy: number
      faithfulness: number
      relevance: number
      coherence: number
      safety: string
      reasoning: string
    }

    interface BQASMetrics {
      total_tests: number
      passed_tests: number
      failed_tests: number
      avg_intent_accuracy: number
      avg_faithfulness: number
      avg_relevance: number
      avg_coherence: number
      safety_pass_rate: number
      avg_composite_score: number
      scores_by_intent: Record<string, number>
      failed_test_ids: string[]
    }

    interface TestRun {
      id: number
      timestamp: string
      git_commit: string
      golden_score: number
      synthetic_score: number
      total_tests: number
      passed_tests: number
      failed_tests: number
      duration_seconds: number
    }

    it('should have valid TestResult structure', () => {
      const testResult: TestResult = {
        test_id: 'INT-001',
        test_name: 'Test Name',
        passed: true,
        composite_score: 4.5,
        intent_accuracy: 95,
        faithfulness: 5,
        relevance: 4,
        coherence: 4,
        safety: 'pass',
        reasoning: 'Good result',
      }

      expect(testResult.test_id).toBe('INT-001')
      expect(testResult.passed).toBe(true)
      expect(testResult.composite_score).toBeGreaterThanOrEqual(0)
      expect(testResult.composite_score).toBeLessThanOrEqual(5)
    })

    it('should have valid BQASMetrics structure', () => {
      const metrics: BQASMetrics = {
        total_tests: 100,
        passed_tests: 90,
        failed_tests: 10,
        avg_intent_accuracy: 85.5,
        avg_faithfulness: 4.2,
        avg_relevance: 4.0,
        avg_coherence: 4.1,
        safety_pass_rate: 0.95,
        avg_composite_score: 4.0,
        scores_by_intent: {
          student_observation: 4.5,
          worksheet_generate: 3.8,
        },
        failed_test_ids: ['INT-001', 'INT-002'],
      }

      expect(metrics.total_tests).toBe(metrics.passed_tests + metrics.failed_tests)
      expect(metrics.safety_pass_rate).toBeGreaterThanOrEqual(0)
      expect(metrics.safety_pass_rate).toBeLessThanOrEqual(1)
    })

    it('should have valid TestRun structure', () => {
      const testRun: TestRun = {
        id: 1,
        timestamp: '2026-01-26T10:00:00Z',
        git_commit: 'abc1234',
        golden_score: 4.2,
        synthetic_score: 3.9,
        total_tests: 100,
        passed_tests: 90,
        failed_tests: 10,
        duration_seconds: 120.5,
      }

      expect(testRun.id).toBeGreaterThan(0)
      expect(testRun.golden_score).toBeGreaterThanOrEqual(0)
      expect(testRun.golden_score).toBeLessThanOrEqual(5)
    })
  })

  describe('Metric Calculations', () => {
    it('should calculate pass rate correctly', () => {
      const metrics = {
        total_tests: 100,
        passed_tests: 85,
        failed_tests: 15,
      }

      const passRate = (metrics.passed_tests / metrics.total_tests) * 100
      expect(passRate).toBe(85)
    })

    it('should handle zero tests gracefully', () => {
      const metrics = {
        total_tests: 0,
        passed_tests: 0,
        failed_tests: 0,
      }

      const passRate = metrics.total_tests > 0
        ? (metrics.passed_tests / metrics.total_tests) * 100
        : 0

      expect(passRate).toBe(0)
    })

    it('should classify trend correctly', () => {
      const classifyTrend = (scores: number[]): 'improving' | 'stable' | 'declining' | 'insufficient_data' => {
        if (scores.length < 3) return 'insufficient_data'

        const recentAvg = scores.slice(-3).reduce((a, b) => a + b, 0) / 3
        const oldAvg = scores.slice(0, 3).reduce((a, b) => a + b, 0) / 3

        const diff = recentAvg - oldAvg

        if (diff > 0.1) return 'improving'
        if (diff < -0.1) return 'declining'
        return 'stable'
      }

      // Improving trend
      expect(classifyTrend([3.0, 3.1, 3.2, 3.5, 3.8, 4.0])).toBe('improving')

      // Declining trend
      expect(classifyTrend([4.0, 3.8, 3.5, 3.2, 3.1, 3.0])).toBe('declining')

      // Stable trend
      expect(classifyTrend([4.0, 4.0, 4.0, 4.0, 4.0, 4.0])).toBe('stable')

      // Insufficient data
      expect(classifyTrend([4.0, 4.0])).toBe('insufficient_data')
    })
  })

  describe('Score Thresholds', () => {
    it('should identify passing scores correctly', () => {
      const minScore = 3.5

      const passingScores = [3.5, 4.0, 4.5, 5.0]
      const failingScores = [0.0, 1.0, 2.0, 3.0, 3.4]

      passingScores.forEach(score => {
        expect(score >= minScore).toBe(true)
      })

      failingScores.forEach(score => {
        expect(score >= minScore).toBe(false)
      })
    })

    it('should color-code scores correctly', () => {
      const getScoreColor = (score: number): string => {
        if (score >= 4) return 'emerald'
        if (score >= 3) return 'amber'
        return 'red'
      }

      expect(getScoreColor(4.5)).toBe('emerald')
      expect(getScoreColor(4.0)).toBe('emerald')
      expect(getScoreColor(3.5)).toBe('amber')
      expect(getScoreColor(3.0)).toBe('amber')
      expect(getScoreColor(2.5)).toBe('red')
      expect(getScoreColor(0.0)).toBe('red')
    })
  })

  describe('API URL Configuration', () => {
    it('should use correct default voice service URL', () => {
      const defaultUrl = 'http://localhost:8091'
      expect(defaultUrl).toContain('8091')
    })

    it('should construct correct API endpoints', () => {
      const baseUrl = 'http://localhost:8091'

      const endpoints = {
        runs: `${baseUrl}/api/v1/bqas/runs`,
        trend: `${baseUrl}/api/v1/bqas/trend`,
        latestMetrics: `${baseUrl}/api/v1/bqas/latest-metrics`,
        runGolden: `${baseUrl}/api/v1/bqas/run/golden`,
        runSynthetic: `${baseUrl}/api/v1/bqas/run/synthetic`,
        runRag: `${baseUrl}/api/v1/bqas/run/rag`,
      }

      expect(endpoints.runs).toBe('http://localhost:8091/api/v1/bqas/runs')
      expect(endpoints.trend).toBe('http://localhost:8091/api/v1/bqas/trend')
    })
  })

  describe('Component Rendering Logic', () => {
    it('should format timestamps correctly', () => {
      const timestamp = '2026-01-26T10:30:00Z'
      const date = new Date(timestamp)

      // German locale formatting
      const formatted = date.toLocaleString('de-DE')
      expect(formatted).toBeTruthy()
    })

    it('should truncate git commits correctly', () => {
      const fullCommit = 'abc1234567890def'
      const shortCommit = fullCommit.slice(0, 7)

      expect(shortCommit).toBe('abc1234')
      expect(shortCommit.length).toBe(7)
    })

    it('should generate correct progress bar widths', () => {
      const getProgressWidth = (score: number, maxScore: number = 5): string => {
        return `${(score / maxScore) * 100}%`
      }

      expect(getProgressWidth(4.0)).toBe('80%')
      expect(getProgressWidth(5.0)).toBe('100%')
      expect(getProgressWidth(2.5)).toBe('50%')
      expect(getProgressWidth(0)).toBe('0%')
    })
  })

  describe('Tab Navigation', () => {
    const tabs = ['overview', 'golden', 'rag', 'synthetic', 'history'] as const
    type TabId = typeof tabs[number]

    it('should have all required tabs', () => {
      expect(tabs).toContain('overview')
      expect(tabs).toContain('golden')
      expect(tabs).toContain('rag')
      expect(tabs).toContain('synthetic')
      expect(tabs).toContain('history')
    })

    it('should allow valid tab transitions', () => {
      const isValidTab = (tab: string): tab is TabId => {
        return tabs.includes(tab as TabId)
      }

      expect(isValidTab('overview')).toBe(true)
      expect(isValidTab('golden')).toBe(true)
      expect(isValidTab('invalid')).toBe(false)
    })
  })

  describe('Error Handling', () => {
    it('should handle API errors gracefully', async () => {
      const mockFetch = jest.fn().mockRejectedValue(new Error('Network error'))

      try {
        await mockFetch('http://localhost:8091/api/v1/bqas/runs')
        fail('Should have thrown an error')
      } catch (error) {
        expect(error).toBeInstanceOf(Error)
        expect((error as Error).message).toBe('Network error')
      }
    })

    it('should provide fallback values for missing data', () => {
      const metrics = null

      const displayScore = metrics?.avg_composite_score?.toFixed(2) || '-'
      const displayTotal = metrics?.total_tests || 0

      expect(displayScore).toBe('-')
      expect(displayTotal).toBe(0)
    })
  })

  describe('RAG Test Categories', () => {
    const categories = [
      { id: 'eh_retrieval', name: 'EH Retrieval Quality' },
      { id: 'operator_alignment', name: 'Operator Alignment' },
      { id: 'hallucination_control', name: 'Hallucination Control' },
      { id: 'citation_enforcement', name: 'Citation Enforcement' },
      { id: 'privacy_compliance', name: 'Privacy/DSGVO Compliance' },
      { id: 'namespace_isolation', name: 'Namespace Isolation' },
    ]

    it('should have all required RAG categories', () => {
      expect(categories).toHaveLength(6)

      const categoryIds = categories.map(c => c.id)
      expect(categoryIds).toContain('eh_retrieval')
      expect(categoryIds).toContain('operator_alignment')
      expect(categoryIds).toContain('privacy_compliance')
    })

    it('should have human-readable names for all categories', () => {
      categories.forEach(category => {
        expect(category.name).toBeTruthy()
        expect(category.name.length).toBeGreaterThan(0)
      })
    })
  })
})