defmodule DSPEx.SchemaTest do
  use ExUnit.Case, async: true
  use PropCheck

  alias DSPEx.Schema

  describe "DSPEx.Schema wrapper functionality" do
    test "input_field/3 generates correct field metadata" do
      # Test that input fields are properly tagged
    end

    test "output_field/3 generates correct field metadata" do  
      # Test that output fields are properly tagged
    end

    test "validate_inputs/1 validates only input fields" do
      # Test partial validation of inputs only
    end

    test "validate_outputs/1 validates only output fields" do
      # Test partial validation of outputs only
    end

    test "json_schema/0 generates complete JSON schema" do
      # Test JSON schema generation includes all metadata
    end
  end

  describe "backward compatibility" do
    test "existing signature behavior is preserved" do
      # Test that DSPEx.Schema works like existing signatures
    end

    test "field access patterns remain unchanged" do
      # Test that field access still works
    end
  end

  # Property-based tests for schema validation
  property "all valid inputs pass validation" do
    forall input_data <- valid_input_generator() do
      # Generated valid inputs should always pass validation
    end
  end

  property "invalid inputs are properly rejected" do
    forall invalid_data <- invalid_input_generator() do
      # Generated invalid inputs should fail with structured errors
    end
  end
end

defmodule DSPEx.SignatureCompatTest do
  use ExUnit.Case, async: true

  describe "string signature compatibility" do
    test "simple signatures are converted correctly" do
      # Test "question -> answer" conversion
    end

    test "complex signatures with multiple fields" do
      # Test "context, question -> answer, confidence"
    end

    test "existing struct behavior is preserved" do
      # Test that structs still work as expected
    end

    test "field access patterns unchanged" do
      # Test that .field access still works
    end
  end

  describe "migration compatibility" do
    test "old signatures work with new predict/3" do
      # Test mixed usage scenarios
    end

    test "validation errors are consistent" do
      # Test error format compatibility
    end
  end
end

defmodule DSPEx.PredictElixactTest do
  use ExUnit.Case, async: true

  describe "elixact-enhanced prediction" do
    test "structured input validation works" do
      # Test validation before LLM call
    end

    test "structured output validation works" do
      # Test validation after LLM response
    end

    test "validation errors are well-structured" do
      # Test error format and content
    end

    test "performance is not significantly impacted" do
      # Benchmark validation overhead
    end
  end

  describe "mixed signature support" do
    test "old signatures still work" do
      # Test backward compatibility
    end

    test "new elixact signatures work" do
      # Test new functionality
    end

    test "error handling is consistent" do
      # Test error propagation
    end
  end
end

defmodule DSPEx.TypesTest do
  use ExUnit.Case, async: true
  use PropCheck

  alias DSPEx.Types.{ConfidenceScore, ReasoningChain, Image, Tool}

  describe "ConfidenceScore type" do
    test "validates range 0.0 to 1.0" do
      # Test boundary validation
    end

    test "rejects invalid values" do
      # Test validation failures
    end

    property "all valid confidence scores serialize correctly" do
      forall score <- confidence_score_generator() do
        # Test serialization/deserialization
      end
    end
  end

  describe "ReasoningChain type" do
    test "validates step structure" do
      # Test reasoning step validation
    end

    test "supports nested reasoning" do
      # Test complex reasoning chains
    end
  end

  describe "multi-modal types" do
    test "Image type validates format and encoding" do
      # Test image validation
    end

    test "Tool type validates schema and parameters" do
      # Test tool calling structure
    end
  end
end

defmodule DSPEx.AdapterStructuredTest do
  use ExUnit.Case, async: true

  describe "automatic JSON schema generation" do
    test "simple schemas generate correctly" do
      # Test basic field types
    end

    test "complex nested schemas work" do
      # Test nested objects and arrays
    end

    test "custom types are handled" do
      # Test ConfidenceScore, ReasoningChain, etc.
    end

    test "schema validation matches expectations" do
      # Test that generated schemas validate correctly
    end
  end

  describe "LLM provider compatibility" do
    test "OpenAI structured outputs work" do
      # Test OpenAI schema format
    end

    test "Anthropic tool calling works" do
      # Test Anthropic schema format  
    end

    test "Gemini structured generation works" do
      # Test Gemini schema format
    end
  end
end

defmodule DSPEx.TeleprompterElixactTest do
  use ExUnit.Case, async: true

  describe "SIMBA with elixact signatures" do
    test "optimization works with structured validation" do
      # Test SIMBA optimization with validation
    end

    test "examples are properly validated" do
      # Test example validation during optimization
    end

    test "performance is maintained" do
      # Benchmark optimization performance
    end
  end

  describe "BootstrapFewShot with elixact" do
    test "example generation includes validation" do
      # Test validated example generation
    end

    test "bootstrap process handles validation errors" do
      # Test error handling during bootstrap
    end
  end
end

defmodule DSPEx.MigrationValidationTest do
  use ExUnit.Case

  @moduletag :migration

  describe "phase-by-phase migration validation" do
    test "Phase 1: Foundation components work" do
      # Validate Phase 1 deliverables
    end

    test "Phase 2: Core integration is complete" do
      # Validate Phase 2 deliverables  
    end

    test "Phase 3: Adapters are enhanced" do
      # Validate Phase 3 deliverables
    end

    # ... continue for all phases
  end

  describe "backward compatibility validation" do
    test "all existing examples still work" do
      # Run existing example files
    end

    test "existing test suite passes" do
      # Validate no regressions
    end

    test "API surface is unchanged" do
      # Test public API compatibility
    end
  end
end

defmodule DSPEx.MigrationToolsTest do
  use ExUnit.Case, async: true

  alias DSPEx.Migration.{AnalysisTool, ConversionTool}

  describe "signature analysis" do
    test "detects all string-based signatures" do
      # Test signature detection
    end

    test "identifies conversion candidates" do
      # Test conversion analysis
    end

    test "estimates migration complexity" do
      # Test complexity analysis
    end
  end

  describe "automatic conversion" do
    test "simple signatures convert correctly" do
      # Test basic conversion
    end

    test "complex signatures preserve semantics" do
      # Test advanced conversion
    end

    test "conversion is idempotent" do
      # Test repeated conversion safety
    end
  end
end

defmodule DSPEx.SchemaValidationProperties do
  use ExUnit.Case
  use PropCheck

  property "valid data always passes validation" do
    forall {schema_module, valid_data} <- schema_with_valid_data() do
      {:ok, _validated} = schema_module.validate(valid_data)
    end
  end

  property "invalid data always fails validation" do
    forall {schema_module, invalid_data} <- schema_with_invalid_data() do
      {:error, _errors} = schema_module.validate(invalid_data)
    end
  end

  property "validation is deterministic" do
    forall {schema_module, data} <- schema_with_data() do
      result1 = schema_module.validate(data)
      result2 = schema_module.validate(data)
      result1 == result2
    end
  end

  property "serialization roundtrip preserves data" do
    forall {schema_module, valid_data} <- schema_with_valid_data() do
      {:ok, validated} = schema_module.validate(valid_data)
      dumped = schema_module.dump(validated)
      {:ok, re_validated} = schema_module.validate(dumped)
      validated == re_validated
    end
  end
end

defmodule DSPEx.JsonSchemaProperties do
  use ExUnit.Case
  use PropCheck

  property "generated schemas are valid JSON schema" do
    forall schema_module <- schema_module_generator() do
      json_schema = schema_module.json_schema()
      # Validate against JSON Schema meta-schema
      is_valid_json_schema(json_schema)
    end
  end

  property "generated schemas validate expected data" do
    forall {schema_module, valid_data} <- schema_with_valid_data() do
      json_schema = schema_module.json_schema()
      # Test that valid data passes JSON schema validation
      json_schema_validates(json_schema, valid_data)
    end
  end
end

defmodule DSPEx.ValidationOverheadBench do
  use Benchee

  def run_benchmarks do
    Benchee.run(
      %{
        "string_signature_validation" => fn {sig, data} ->
          # Benchmark old validation
        end,
        "elixact_signature_validation" => fn {sig, data} ->
          # Benchmark new validation
        end,
        "json_schema_generation" => fn sig ->
          # Benchmark schema generation
        end,
        "structured_output_parsing" => fn {sig, response} ->
          # Benchmark structured parsing
        end
      },
      inputs: benchmark_inputs(),
      memory_time: 2,
      reduction_time: 2
    )
  end

  defp benchmark_inputs do
    %{
      "simple_signature" => generate_simple_test_case(),
      "complex_signature" => generate_complex_test_case(),
      "nested_signature" => generate_nested_test_case()
    }
  end
end

defmodule DSPEx.E2EElixactWorkflowTest do
  use ExUnit.Case

  @moduletag :integration

  describe "complete workflows with elixact" do
    test "question answering with validation" do
      # Full QA workflow with input/output validation
    end

    test "multi-step reasoning with structured output" do
      # Complex reasoning workflow
    end

    test "teleprompter optimization with validation" do
      # Full optimization cycle with validation
    end

    test "error recovery with structured errors" do
      # Error handling throughout pipeline
    end
  end

  describe "mixed signature workflows" do
    test "old and new signatures work together" do
      # Test mixed usage in single workflow
    end

    test "gradual migration scenarios" do
      # Test partial migration scenarios
    end
  end
end

defmodule DSPEx.ElixactTestConfig do
  @doc """
  Configuration for elixact integration tests
  """
  
  def test_schemas do
    [
      simple_qa_schema(),
      complex_reasoning_schema(), 
      multi_modal_schema(),
      custom_types_schema()
    ]
  end

  def mock_llm_responses do
    %{
      valid_responses: valid_response_fixtures(),
      invalid_responses: invalid_response_fixtures(),
      edge_case_responses: edge_case_fixtures()
    }
  end

  defp simple_qa_schema do
    # Define test schema
  end

  # ... other test fixtures
end

defmodule DSPEx.ElixactTestHelpers do
  @doc """
  Helpers for elixact integration testing
  """

  def create_test_signature(fields, opts \\ []) do
    # Dynamic signature creation for testing
  end

  def generate_valid_data_for_schema(schema_module) do
    # Generate valid test data
  end

  def generate_invalid_data_for_schema(schema_module) do
    # Generate invalid test data
  end

  def assert_structured_error(error, expected_fields) do
    # Assert error structure
  end

  def assert_validation_passes(schema, data) do
    # Assert validation success
  end

  def assert_validation_fails(schema, data, expected_errors) do
    # Assert validation failure with specific errors
  end
end

# Phase 1: Unit Tests
mix test test/unit/dspex_schema_test.exs
mix test test/unit/signature_compat_test.exs

# Phase 2: Integration Tests  
mix test test/unit/predict_elixact_test.exs
mix test test/unit/dspex_types_test.exs

# Phase 3: Adapter Tests
mix test test/unit/adapter_structured_test.exs

# Phase 4: Advanced Features
mix test test/integration/teleprompter_elixact_test.exs

# Migration Validation
mix test test/migration/ --include migration

# Property Tests
mix test test/property/ --include property

# Performance Benchmarks
mix test test/benchmarks/ --include benchmark

# Full Integration
mix test --include integration