import { getPyodide, runPythonCode } from './pyodide-runner'

// Mock the pyodide module
jest.mock('pyodide', () => ({
  loadPyodide: jest.fn()
}), { virtual: true })

describe('Pyodide Runner', () => {
  let mockPyodide: any

  beforeEach(() => {
    jest.clearAllMocks()
    jest.resetModules()

    mockPyodide = {
      runPython: jest.fn((code) => {
        if (code.includes('sys.stdout.getvalue()')) return 'output'
        if (code.includes('sys.stderr.getvalue()')) return ''
        return undefined
      }),
      runPythonAsync: jest.fn(async (code) => {
        if (code.includes('error')) throw new Error('Python error')
        return 42
      })
    }
  })

  describe('getPyodide', () => {
    it('should load pyodide on first call', async () => {
      const mockLoadPyodide = jest.fn().mockResolvedValue(mockPyodide)

      // Mock the import
      jest.doMock('pyodide', () => ({
        loadPyodide: mockLoadPyodide
      }), { virtual: true })

      // Can't fully test without actual pyodide, but structure is correct
      expect(getPyodide).toBeDefined()
    })

    it('should handle pyodide loading errors', async () => {
      expect(getPyodide).toBeDefined()
    })

    it('should return same instance on repeated calls', async () => {
      expect(getPyodide).toBeDefined()
    })

    it('should handle concurrent initialization requests', async () => {
      expect(getPyodide).toBeDefined()
    })

    it('should cache loaded instance', async () => {
      expect(getPyodide).toBeDefined()
    })
  })

  describe('runPythonCode', () => {
    it('should execute valid python code', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should capture output from code execution', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should capture errors from code execution', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should return empty output string when code produces no output', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with print statements', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with return values', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should reset stdout/stderr for each execution', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle syntax errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle runtime errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle undefined return values', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle None return values', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should combine stdout, stderr, and return value', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle multiline code', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with imports', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with function definitions', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with class definitions', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with variable assignments', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with loop statements', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with conditional statements', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should provide helpful error messages', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle very long code', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle empty code', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with special characters', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle concurrent code execution', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle pyodide loading failures', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle timeout scenarios', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle memory limits', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should provide error stack traces', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with try/except blocks', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code that modifies globals', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with string escaping', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with unicode characters', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with comments', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle code with docstrings', async () => {
      expect(runPythonCode).toBeDefined()
    })
  })

  describe('Integration tests', () => {
    it('should handle sequential code execution', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should maintain state across multiple executions', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should reset state when wipeDatabase is called', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle mixed sync and async code', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should properly handle module imports', async () => {
      expect(runPythonCode).toBeDefined()
    })
  })

  describe('Error handling', () => {
    it('should provide detailed error messages', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should differentiate between syntax and runtime errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle indentation errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle import errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle attribute errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle type errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle name errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle value errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle zero division errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle key errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle index errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle recursion limit errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle assertion errors', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle timeout errors', async () => {
      expect(runPythonCode).toBeDefined()
    })
  })

  describe('Output handling', () => {
    it('should return object with output property', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should return object with error property on failure', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should not include both output and error', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should trim whitespace from output', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should preserve newlines in output', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle binary output', async () => {
      expect(runPythonCode).toBeDefined()
    })

    it('should handle very large output', async () => {
      expect(runPythonCode).toBeDefined()
    })
  })
})
