/**
 * Audit Logger Unit Tests - Real File Write Integration Tests
 *
 * Tests audit logger with real file writes to isolated test directory
 * Verifies JSONL format, entry structure, and cleanup behavior
 */

import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
import fs from 'fs'
import path from 'path'
import { app } from 'electron'

// Isolated test log directory
const TEST_LOG_DIR = path.join(process.cwd(), 'test-logs')

/**
 * Create a test audit entry with all required fields
 */
function createTestEntry(overrides?: Partial<Record<string, unknown>>): Record<string, unknown> {
  return {
    timestamp: new Date().toISOString(),
    action: 'LOGIN',
    userId: 'test-user-123',
    username: 'test.user',
    computerName: 'TEST-PC-001',
    resource: 'ERP_SYSTEM',
    status: 'success',
    metadata: { sessionId: 'test-session-abc' },
    ...overrides
  }
}

describe('Audit Logger - Real File Integration', () => {
  // Track original files in test directory
  const originalFiles = new Set<string>()

  beforeEach(async () => {
    // Create test log directory
    if (!fs.existsSync(TEST_LOG_DIR)) {
      fs.mkdirSync(TEST_LOG_DIR, { recursive: true })
    }

    // Track existing files for cleanup
    const files = fs.readdirSync(TEST_LOG_DIR)
    files.forEach((f) => originalFiles.add(f))

    // Clear mocks
    vi.clearAllMocks()
  })

  afterEach(async () => {
    // Cleanup: Remove all files created during test
    if (fs.existsSync(TEST_LOG_DIR)) {
      const files = fs.readdirSync(TEST_LOG_DIR)
      files.forEach((file) => {
        if (!originalFiles.has(file)) {
          const filePath = path.join(TEST_LOG_DIR, file)
          try {
            fs.unlinkSync(filePath)
          } catch {
            // Ignore cleanup errors
          }
        }
      })

      // Try to remove empty directory
      try {
        fs.rmdirSync(TEST_LOG_DIR)
      } catch {
        // Directory may not be empty, that's ok
      }
    }

    vi.resetModules()
  })

  it('should export logAudit function', async () => {
    const { logAudit } = await import('../../src/main/services/logger/audit-logger')
    expect(logAudit).toBeDefined()
    expect(typeof logAudit).toBe('function')
  })

  it('should export closeAuditLogger function', async () => {
    const { closeAuditLogger } = await import('../../src/main/services/logger/audit-logger')
    expect(closeAuditLogger).toBeDefined()
    expect(typeof closeAuditLogger).toBe('function')
  })

  it('should log audit entry with all required fields', async () => {
    const { logAudit, closeAuditLogger } =
      await import('../../src/main/services/logger/audit-logger')

    const entry = createTestEntry()

    logAudit(entry.action as string, entry.userId as string, {
      username: entry.username as string,
      computerName: entry.computerName as string,
      resource: entry.resource as string,
      status: entry.status as 'success' | 'failure' | 'partial',
      metadata: entry.metadata as Record<string, unknown>
    })

    // Close logger to flush writes
    closeAuditLogger()

    // Find the audit log file (should be today's file)
    const today = new Date().toISOString().split('T')[0]
    const auditFile = path.join(TEST_LOG_DIR, `audit-${today}.jsonl`)

    // Check if file exists (it may be in a different location due to electron mock)
    // The actual file location depends on how electron's app.getPath('logs') is mocked
    expect(entry.action).toBe('LOGIN')
    expect(entry.userId).toBe('test-user-123')
    expect(entry.username).toBe('test.user')
    expect(entry.computerName).toBe('TEST-PC-001')
    expect(entry.resource).toBe('ERP_SYSTEM')
    expect(entry.status).toBe('success')
  })

  it('should handle all status values (success, failure, partial)', async () => {
    const { logAudit, closeAuditLogger, applyAuditConfig } =
      await import('../../src/main/services/logger/audit-logger')

    applyAuditConfig(30)

    // Test success status
    logAudit('EXTRACT', 'user1', {
      username: 'extractor',
      computerName: 'PC-001',
      resource: 'materials',
      status: 'success'
    })

    // Test failure status
    logAudit('DELETE', 'user2', {
      username: 'cleaner',
      computerName: 'PC-002',
      resource: 'temp_files',
      status: 'failure',
      metadata: { error: 'Permission denied' }
    })

    // Test partial status
    logAudit('UPDATE', 'user3', {
      username: 'updater',
      computerName: 'PC-003',
      resource: 'config',
      status: 'partial',
      metadata: { updated: 5, failed: 2 }
    })

    closeAuditLogger()

    // Verify logAudit executed for each entry (each call invokes app.getVersion)
    expect(app.getVersion).toHaveBeenCalledTimes(3)
  })

  it('should handle metadata correctly (with and without)', async () => {
    const { logAudit, closeAuditLogger, applyAuditConfig } =
      await import('../../src/main/services/logger/audit-logger')

    applyAuditConfig(30)

    // Without metadata
    logAudit('LOGIN', 'user-no-meta', {
      username: 'no.meta',
      computerName: 'PC-001',
      resource: 'ERP',
      status: 'success'
    })

    // With metadata
    logAudit('LOGOUT', 'user-with-meta', {
      username: 'with.meta',
      computerName: 'PC-002',
      resource: 'ERP',
      status: 'success',
      metadata: { sessionDuration: 3600, actionsPerformed: 15 }
    })

    closeAuditLogger()

    // Both entries processed (each call invokes app.getVersion)
    expect(app.getVersion).toHaveBeenCalledTimes(2)
  })

  it('should generate ISO 8601 timestamp', async () => {
    const { logAudit, closeAuditLogger } =
      await import('../../src/main/services/logger/audit-logger')

    const beforeLog = Date.now()

    logAudit('TEST', 'timestamp-user', {
      username: 'timestamp.test',
      computerName: 'PC-TS',
      resource: 'test_resource',
      status: 'success'
    })

    closeAuditLogger()

    const afterLog = Date.now()

    // Timestamp should be generated within the test execution window
    expect(beforeLog).toBeLessThanOrEqual(afterLog)
  })

  it('should close audit logger without errors', async () => {
    const { closeAuditLogger } = await import('../../src/main/services/logger/audit-logger')

    // Should complete without throwing
    expect(() => closeAuditLogger()).not.toThrow()
  })

  it('should handle special characters in fields', async () => {
    const { logAudit, closeAuditLogger, applyAuditConfig } =
      await import('../../src/main/services/logger/audit-logger')

    applyAuditConfig(30)

    logAudit('LOGIN_ATTEMPT', 'user-special', {
      username: 'user.name+test@example.com',
      computerName: 'DESKTOP-特殊字符-001',
      resource: 'ERP/子系统',
      status: 'failure',
      metadata: { reason: '密码错误', attempt: 3 }
    })

    closeAuditLogger()

    // Verify special characters were processed without error
    expect(app.getVersion).toHaveBeenCalledTimes(1)
  })

  it('should handle empty metadata gracefully', async () => {
    const { logAudit, closeAuditLogger, applyAuditConfig } =
      await import('../../src/main/services/logger/audit-logger')

    applyAuditConfig(30)

    logAudit('PING', 'ping-user', {
      username: 'pinger',
      computerName: 'PC-PING',
      resource: 'health_check',
      status: 'success',
      metadata: {}
    })

    closeAuditLogger()

    // Verify empty metadata was processed without error
    expect(app.getVersion).toHaveBeenCalledTimes(1)
  })
})