/**
 * Simple demonstration test for the new process utilities mocking
 * This shows how to test the functions from process.ts with our enhanced mocks
 */

import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
import { 
  setupMockEnvironment,
  createFileSystemMock,
  createProcessMock,
  createElectronAppMock,
  createOsMock,
  createPathMock,
  createLogMock,
  createProcessUtilsMock
} from '../../../mocks/environmentMocks'

// Set up vi.mock calls at the top level to avoid hoisting issues
vi.mock('fs', () => createFileSystemMock())
vi.mock('child_process', () => createProcessMock())
vi.mock('os', () => ({ default: createOsMock() }))
vi.mock('path', () => ({ default: createPathMock() }))
vi.mock('electron', () => ({
  app: createElectronAppMock(),
  BrowserWindow: vi.fn()
}))
vi.mock('electron-log', () => ({ default: createLogMock() }))
vi.mock('../../../../electron/main/utils/process', () => createProcessUtilsMock())

describe('Process Utils Mocking Demo', () => {
  let mockEnv: ReturnType<typeof setupMockEnvironment>

  beforeEach(() => {
    mockEnv = setupMockEnvironment()
  })

  afterEach(() => {
    mockEnv.reset()
  })

  describe('Binary Path Functions', () => {
    it('should return correct binary paths based on platform', async () => {
      // Test Windows binary naming
      mockEnv.mockState.system.platform = 'win32'
      
      const uvBinaryName = await mockEnv.processUtilsMock.getBinaryName('uv')
      expect(uvBinaryName).toBe('uv.exe')

      const uvBinaryPath = await mockEnv.processUtilsMock.getBinaryPath('uv')
      expect(uvBinaryPath).toContain('.eigent/bin')
      expect(uvBinaryPath).toContain('uv.exe')
    })

    it('should return correct binary paths for macOS', async () => {
      mockEnv.scenarios.macOSEnvironment()
      
      const uvBinaryName = await mockEnv.processUtilsMock.getBinaryName('uv')
      expect(uvBinaryName).toBe('uv')

      const uvBinaryPath = await mockEnv.processUtilsMock.getBinaryPath('uv')
      expect(uvBinaryPath).toContain('.eigent/bin')
      expect(uvBinaryPath).toContain('/uv')
      expect(uvBinaryPath).not.toContain('.exe')
    })
  })

  describe('Directory Path Functions', () => {
    it('should return correct backend path for development mode', () => {
      mockEnv.mockState.app.isPackaged = false
      
      const backendPath = mockEnv.processUtilsMock.getBackendPath()
      expect(backendPath).toContain('/backend')
      expect(backendPath).not.toContain('resources')
    })

    it('should return correct backend path for packaged app', () => {
      mockEnv.scenarios.packagedApp()
      
      const backendPath = mockEnv.processUtilsMock.getBackendPath()
      expect(backendPath).toContain('backend')
      // In packaged mode, it should use resources path
      expect(mockEnv.mockState.app.isPackaged).toBe(true)
    })

    it('should return correct cache paths', () => {
      const cachePath = mockEnv.processUtilsMock.getCachePath('models')
      expect(cachePath).toContain('.eigent/cache/models')
    })

    it('should return correct venv paths', () => {
      const venvPath = mockEnv.processUtilsMock.getVenvPath('1.0.0')
      expect(venvPath).toContain('.eigent/venvs/backend-1.0.0')
    })
  })

  describe('Binary Existence Checking', () => {
    it('should correctly check binary existence', async () => {
      // Set up scenario where uv exists but bun doesn't
      mockEnv.mockState.filesystem.binariesExist = { 'uv': true, 'bun': false }
      
      const uvExists = await mockEnv.processUtilsMock.isBinaryExists('uv')
      const bunExists = await mockEnv.processUtilsMock.isBinaryExists('bun')
      
      expect(uvExists).toBe(true)
      expect(bunExists).toBe(false)
    })
  })

  describe('Old Venv Cleanup', () => {
    it('should cleanup old venvs correctly', async () => {
      // Set up scenario with multiple old venvs
      mockEnv.scenarios.multipleOldVenvs('1.0.0')
      
      const initialOldVenvs = [...mockEnv.mockState.filesystem.oldVenvsExist]
      expect(initialOldVenvs).toContain('backend-0.9.0')
      expect(initialOldVenvs).toContain('backend-0.9.5')
      expect(initialOldVenvs).toContain('backend-1.0.1-beta')
      
      // Run cleanup
      await mockEnv.processUtilsMock.cleanupOldVenvs('1.0.0')
      
      // Should keep current version but remove others
      const remainingVenvs = mockEnv.mockState.filesystem.oldVenvsExist
      console.log(remainingVenvs);
      
      
      expect(remainingVenvs).toContain('backend-1.0.0')
      expect(remainingVenvs).not.toContain('backend-0.9.0')
      expect(remainingVenvs).not.toContain('backend-0.9.5')
      expect(remainingVenvs).not.toContain('backend-1.0.1-beta')
    })
  })

  describe('Installation Decision Matrix', () => {
    it('should correctly determine when installation is needed', () => {
      // Test the decision logic that createWindow uses
      const checkInstallationNeeded = (mockState: any) => {
        const currentVersion = mockState.app.currentVersion
        const versionExists = mockState.filesystem.versionFileExists
        const savedVersion = versionExists ? mockState.filesystem.versionFileContent : ''
        const uvExists = mockState.filesystem.binariesExist['uv'] || false
        const bunExists = mockState.filesystem.binariesExist['bun'] || false
        const installationCompleted = mockState.filesystem.installedLockExists

        return !versionExists || 
               savedVersion !== currentVersion || 
               !uvExists || 
               !bunExists || 
               !installationCompleted
      }

      // Test fresh install scenario
      mockEnv.scenarios.freshInstall()
      expect(checkInstallationNeeded(mockEnv.mockState)).toBe(true)

      // Test version update scenario
      mockEnv.scenarios.versionUpdate('0.9.0', '1.0.0')
      expect(checkInstallationNeeded(mockEnv.mockState)).toBe(true)

      // Test all good scenario
      mockEnv.mockState.filesystem.versionFileExists = true
      mockEnv.mockState.filesystem.versionFileContent = '1.0.0'
      mockEnv.mockState.app.currentVersion = '1.0.0'
      mockEnv.mockState.filesystem.binariesExist = { 'uv': true, 'bun': true }
      mockEnv.mockState.filesystem.installedLockExists = true
      expect(checkInstallationNeeded(mockEnv.mockState)).toBe(false)
    })
  })

  describe('File System Operations', () => {
    it('should handle directory creation correctly', () => {
      // Test .eigent directory creation
      mockEnv.scenarios.missingEigentDirectories()
      
      expect(mockEnv.mockState.filesystem.eigentDirExists).toBe(false)
      expect(mockEnv.mockState.filesystem.eigentBinDirExists).toBe(false)
      
      // Simulate directory creation
      mockEnv.fsMock.mkdirSync('/mock/home/.eigent', { recursive: true })
      mockEnv.fsMock.mkdirSync('/mock/home/.eigent/bin', { recursive: true })
      
      expect(mockEnv.mockState.filesystem.eigentDirExists).toBe(true)
      expect(mockEnv.mockState.filesystem.eigentBinDirExists).toBe(true)
    })

    it('should handle file operations correctly', () => {
      // Test version file operations
      expect(mockEnv.mockState.filesystem.versionFileExists).toBe(true)
      
      // Write new version
      mockEnv.fsMock.writeFileSync('/path/to/version.txt', '2.0.0')
      expect(mockEnv.mockState.filesystem.versionFileContent).toBe('2.0.0')
      
      // Delete version file
      mockEnv.fsMock.unlinkSync('/path/to/version.txt')
      expect(mockEnv.mockState.filesystem.versionFileExists).toBe(false)
    })
  })
})