package queryapi_test

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	queryapi "queryorchestration/api/queryAPI"
	"queryorchestration/internal/database/repository"
	"queryorchestration/internal/fieldextraction"
	"queryorchestration/internal/serviceconfig"
	"queryorchestration/internal/test"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgtype"
	"github.com/labstack/echo/v4"
	openapi_types "github.com/oapi-codegen/runtime/types"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

type FieldExtractionsTestConfig struct {
	serviceconfig.BaseConfig
}

func (c *FieldExtractionsTestConfig) GetBackgroundRunner() any { return nil }

func setupFieldExtractionsTestController(t *testing.T) (*queryapi.Controllers, *FieldExtractionsTestConfig, uuid.UUID, string) {
	t.Helper()
	cfg := &FieldExtractionsTestConfig{}
	test.CreateDB(t, cfg)

	// Create services
	fieldExtractionSvc := fieldextraction.New(cfg)

	services := &queryapi.Services{
		FieldExtraction: fieldExtractionSvc,
	}

	// Create test client and document with unique IDs
	ctx := t.Context()
	uniqueID := uuid.New().String()[:8]
	clientID := fmt.Sprintf("test-client-%s", uniqueID)
	err := cfg.GetDBQueries().CreateClient(ctx, &repository.CreateClientParams{
		Clientid: clientID,
		Name:     "Test Client",
	})
	require.NoError(t, err)

	filename := "test.pdf"
	documentID, err := cfg.GetDBQueries().CreateDocument(ctx, &repository.CreateDocumentParams{
		Clientid: clientID,
		Hash:     fmt.Sprintf("testhash-%s", uniqueID), // Unique hash per test
		Filename: &filename,
	})
	require.NoError(t, err)

	ctrl := queryapi.NewControllers(services, nil)

	return ctrl, cfg, documentID, clientID
}

func TestCreateFieldExtraction_Success(t *testing.T) {
	ctrl, _, documentID, _ := setupFieldExtractionsTestController(t)

	// Create request body
	reqBody := queryapi.FieldExtractionRequest{
		DocumentId: queryapi.DocumentID(documentID),
		CreatedBy:  openapi_types.Email("test@example.com"),
		SingleFields: queryapi.SingleFields{
			FileName:      ptr("test.pdf"),
			ContractTitle: ptr("Test Contract"),
			ClientName:    ptr("Test Client Inc"),
		},
		ArrayFields: []queryapi.ArrayFieldItem{
			{
				ExhibitTitle: ptr("Exhibit A"),
				ExhibitPage:  ptr("1"),
				ReimbProvTin: ptr("123456789"),
			},
			{
				ExhibitTitle: ptr("Exhibit B"),
				ExhibitPage:  ptr("2"),
				ReimbProvTin: ptr("987654321"),
			},
		},
	}

	body, err := json.Marshal(reqBody)
	require.NoError(t, err)

	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	err = ctrl.CreateFieldExtraction(c)
	require.NoError(t, err)
	assert.Equal(t, http.StatusCreated, rec.Code)

	// Parse response
	var resp queryapi.FieldExtractionResponse
	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	assert.Equal(t, documentID, uuid.UUID(resp.DocumentId))
	assert.Equal(t, int32(1), resp.Version) // First version is 1
	assert.Equal(t, "test@example.com", string(resp.CreatedBy))
	assert.Equal(t, "test.pdf", *resp.SingleFields.FileName)
	assert.Equal(t, "Test Contract", *resp.SingleFields.ContractTitle)
	assert.Len(t, resp.ArrayFields, 2)
	assert.Equal(t, "Exhibit A", *resp.ArrayFields[0].ExhibitTitle)
	assert.Equal(t, "Exhibit B", *resp.ArrayFields[1].ExhibitTitle)
}

func TestCreateFieldExtraction_InvalidRequest(t *testing.T) {
	ctrl, _, _, _ := setupFieldExtractionsTestController(t)

	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader([]byte("invalid json")))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	err := ctrl.CreateFieldExtraction(c)
	// Handler returns an echo.HTTPError which should be treated as an error
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code)
}

func TestCreateFieldExtraction_MissingDocumentID(t *testing.T) {
	ctrl, _, _, _ := setupFieldExtractionsTestController(t)

	reqBody := queryapi.FieldExtractionRequest{
		DocumentId: queryapi.DocumentID(uuid.Nil),
		CreatedBy:  openapi_types.Email("test@example.com"),
		SingleFields: queryapi.SingleFields{
			FileName: ptr("test.pdf"),
		},
		ArrayFields: []queryapi.ArrayFieldItem{},
	}

	body, err := json.Marshal(reqBody)
	require.NoError(t, err)

	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	err = ctrl.CreateFieldExtraction(c)
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code)
}

func TestCreateFieldExtraction_MissingCreatedBy(t *testing.T) {
	// Use a simple controller without database since we're just testing validation
	ctrl := &queryapi.Controllers{}

	// Use a valid document ID but empty createdBy
	documentID := uuid.New()
	body := []byte(fmt.Sprintf(`{
		"documentId": "%s",
		"createdBy": "",
		"singleFields": {"fileName": "test.pdf"},
		"arrayFields": []
	}`, documentID))

	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	err := ctrl.CreateFieldExtraction(c)
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code)
}

func TestGetCurrentFieldExtraction_Success(t *testing.T) {
	ctrl, cfg, documentID, _ := setupFieldExtractionsTestController(t)
	ctx := t.Context()

	// First create a field extraction using the service directly
	svc := fieldextraction.New(cfg)
	filename := "test.pdf"
	contractTitle := "Test Contract"
	_, err := svc.CreateFieldExtraction(ctx, &fieldextraction.CreateFieldExtractionInput{
		DocumentID: documentID,
		SingleFields: &repository.AddFieldExtractionParams{
			Documentid:    documentID,
			Filename:      &filename,
			Contracttitle: &contractTitle,
			Createdby:     "user@example.com",
		},
		ArrayFields: []*repository.AddFieldExtractionArrayFieldParams{},
	})
	require.NoError(t, err)

	// Now test the API
	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions?documentId=%s", documentID), nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetCurrentFieldExtractionParams{
		DocumentId: queryapi.DocumentID(documentID),
	}

	err = ctrl.GetCurrentFieldExtraction(c, params)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)

	// Parse response
	var resp queryapi.FieldExtractionResponse
	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	assert.Equal(t, documentID, uuid.UUID(resp.DocumentId))
	assert.Equal(t, int32(1), resp.Version)
	assert.Equal(t, "user@example.com", string(resp.CreatedBy))
	assert.Equal(t, "Test Contract", *resp.SingleFields.ContractTitle)
}

func TestGetCurrentFieldExtraction_NotFound(t *testing.T) {
	ctrl, _, _, _ := setupFieldExtractionsTestController(t)

	// Use a random document ID that doesn't have any extractions
	randomDocID := uuid.New()

	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions?documentId=%s", randomDocID), nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetCurrentFieldExtractionParams{
		DocumentId: queryapi.DocumentID(randomDocID),
	}

	err := ctrl.GetCurrentFieldExtraction(c, params)
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusNotFound, httpErr.Code)
}

func TestGetCurrentFieldExtraction_InvalidDocumentID(t *testing.T) {
	ctrl, _, _, _ := setupFieldExtractionsTestController(t)

	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, "/field-extractions?documentId=", nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetCurrentFieldExtractionParams{
		DocumentId: queryapi.DocumentID(uuid.Nil),
	}

	err := ctrl.GetCurrentFieldExtraction(c, params)
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code)
}

func TestGetFieldExtractionHistory_Success(t *testing.T) {
	ctrl, cfg, documentID, _ := setupFieldExtractionsTestController(t)
	ctx := t.Context()

	// Create multiple versions
	svc := fieldextraction.New(cfg)
	filename := "test.pdf"

	for i := 1; i <= 3; i++ {
		contractTitle := fmt.Sprintf("Contract Version %d", i)
		_, err := svc.CreateFieldExtraction(ctx, &fieldextraction.CreateFieldExtractionInput{
			DocumentID: documentID,
			SingleFields: &repository.AddFieldExtractionParams{
				Documentid:    documentID,
				Filename:      &filename,
				Contracttitle: &contractTitle,
				Createdby:     fmt.Sprintf("user%d@example.com", i),
			},
			ArrayFields: []*repository.AddFieldExtractionArrayFieldParams{},
		})
		require.NoError(t, err)
	}

	// Now test the API
	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions/history?documentId=%s", documentID), nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetFieldExtractionHistoryParams{
		DocumentId: queryapi.DocumentID(documentID),
	}

	err := ctrl.GetFieldExtractionHistory(c, params)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)

	// Parse response
	var resp struct {
		Versions []queryapi.FieldExtractionVersion `json:"versions"`
	}
	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	// Should have 3 versions, most recent first
	assert.Len(t, resp.Versions, 3)
	assert.Equal(t, int32(3), resp.Versions[0].Version)
	assert.Equal(t, "user3@example.com", string(resp.Versions[0].CreatedBy))
	assert.Equal(t, int32(2), resp.Versions[1].Version)
	assert.Equal(t, "user2@example.com", string(resp.Versions[1].CreatedBy))
	assert.Equal(t, int32(1), resp.Versions[2].Version)
	assert.Equal(t, "user1@example.com", string(resp.Versions[2].CreatedBy))
}

func TestGetFieldExtractionHistory_NoHistory(t *testing.T) {
	ctrl, cfg, _, clientID := setupFieldExtractionsTestController(t)
	ctx := t.Context()

	// Create a new document with no extractions
	filename := "nohistory.pdf"
	newDocID, err := cfg.GetDBQueries().CreateDocument(ctx, &repository.CreateDocumentParams{
		Clientid: clientID,
		Hash:     "nohistoryhash",
		Filename: &filename,
	})
	require.NoError(t, err)

	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions/history?documentId=%s", newDocID), nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetFieldExtractionHistoryParams{
		DocumentId: queryapi.DocumentID(newDocID),
	}

	err = ctrl.GetFieldExtractionHistory(c, params)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)

	// Parse response
	var resp struct {
		Versions []queryapi.FieldExtractionVersion `json:"versions"`
	}
	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	assert.Len(t, resp.Versions, 0)
}

func TestGetFieldExtractionHistory_InvalidDocumentID(t *testing.T) {
	ctrl, _, _, _ := setupFieldExtractionsTestController(t)

	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, "/field-extractions/history?documentId=", nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetFieldExtractionHistoryParams{
		DocumentId: queryapi.DocumentID(uuid.Nil),
	}

	err := ctrl.GetFieldExtractionHistory(c, params)
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code)
}

func TestCreateFieldExtraction_WithDates(t *testing.T) {
	ctrl, _, documentID, _ := setupFieldExtractionsTestController(t)

	effectiveDate := openapi_types.Date{Time: time.Date(2024, 1, 1, 0, 0, 0, 0, time.UTC)}
	terminationDate := openapi_types.Date{Time: time.Date(2025, 12, 31, 0, 0, 0, 0, time.UTC)}
	reimbEffectiveDate := openapi_types.Date{Time: time.Date(2024, 6, 1, 0, 0, 0, 0, time.UTC)}

	reqBody := queryapi.FieldExtractionRequest{
		DocumentId: queryapi.DocumentID(documentID),
		CreatedBy:  openapi_types.Email("test@example.com"),
		SingleFields: queryapi.SingleFields{
			FileName:                   ptr("contract.pdf"),
			ContractTitle:              ptr("Test Contract with Dates"),
			AareteDerivedEffectiveDt:   &effectiveDate,
			AareteDerivedTerminationDt: &terminationDate,
		},
		ArrayFields: []queryapi.ArrayFieldItem{
			{
				ExhibitTitle:     ptr("Exhibit A"),
				ReimbEffectiveDt: &reimbEffectiveDate,
			},
		},
	}

	body, err := json.Marshal(reqBody)
	require.NoError(t, err)

	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	err = ctrl.CreateFieldExtraction(c)
	require.NoError(t, err)
	assert.Equal(t, http.StatusCreated, rec.Code)

	// Parse response
	var resp queryapi.FieldExtractionResponse
	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	// Verify dates are returned correctly
	require.NotNil(t, resp.SingleFields.AareteDerivedEffectiveDt)
	assert.Equal(t, 2024, resp.SingleFields.AareteDerivedEffectiveDt.Year())
	assert.Equal(t, time.January, resp.SingleFields.AareteDerivedEffectiveDt.Month())
	assert.Equal(t, 1, resp.SingleFields.AareteDerivedEffectiveDt.Day())

	require.NotNil(t, resp.SingleFields.AareteDerivedTerminationDt)
	assert.Equal(t, 2025, resp.SingleFields.AareteDerivedTerminationDt.Year())
	assert.Equal(t, time.December, resp.SingleFields.AareteDerivedTerminationDt.Month())
	assert.Equal(t, 31, resp.SingleFields.AareteDerivedTerminationDt.Day())

	require.NotNil(t, resp.ArrayFields[0].ReimbEffectiveDt)
	assert.Equal(t, 2024, resp.ArrayFields[0].ReimbEffectiveDt.Year())
	assert.Equal(t, time.June, resp.ArrayFields[0].ReimbEffectiveDt.Month())
}

func TestCreateFieldExtraction_WithNumericFields(t *testing.T) {
	ctrl, _, documentID, _ := setupFieldExtractionsTestController(t)

	reimbPctRate := 10.5
	reimbFeeRate := 150.75
	grouperBaseRate := 1000.00

	reqBody := queryapi.FieldExtractionRequest{
		DocumentId: queryapi.DocumentID(documentID),
		CreatedBy:  openapi_types.Email("test@example.com"),
		SingleFields: queryapi.SingleFields{
			FileName: ptr("numeric_test.pdf"),
		},
		ArrayFields: []queryapi.ArrayFieldItem{
			{
				ExhibitTitle:    ptr("Exhibit A"),
				ReimbPctRate:    &reimbPctRate,
				ReimbFeeRate:    &reimbFeeRate,
				GrouperBaseRate: &grouperBaseRate,
			},
		},
	}

	body, err := json.Marshal(reqBody)
	require.NoError(t, err)

	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	err = ctrl.CreateFieldExtraction(c)
	require.NoError(t, err)
	assert.Equal(t, http.StatusCreated, rec.Code)

	// Parse response
	var resp queryapi.FieldExtractionResponse
	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	// Verify numeric fields
	require.Len(t, resp.ArrayFields, 1)
	require.NotNil(t, resp.ArrayFields[0].ReimbPctRate)
	assert.InDelta(t, 10.5, *resp.ArrayFields[0].ReimbPctRate, 0.001)
	require.NotNil(t, resp.ArrayFields[0].ReimbFeeRate)
	assert.InDelta(t, 150.75, *resp.ArrayFields[0].ReimbFeeRate, 0.001)
	require.NotNil(t, resp.ArrayFields[0].GrouperBaseRate)
	assert.InDelta(t, 1000.00, *resp.ArrayFields[0].GrouperBaseRate, 0.001)
}

func TestCreateFieldExtraction_EmptyArrayFields(t *testing.T) {
	ctrl, _, documentID, _ := setupFieldExtractionsTestController(t)

	reqBody := queryapi.FieldExtractionRequest{
		DocumentId: queryapi.DocumentID(documentID),
		CreatedBy:  openapi_types.Email("test@example.com"),
		SingleFields: queryapi.SingleFields{
			FileName:      ptr("simple.pdf"),
			ContractTitle: ptr("Simple Contract"),
		},
		ArrayFields: []queryapi.ArrayFieldItem{},
	}

	body, err := json.Marshal(reqBody)
	require.NoError(t, err)

	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	err = ctrl.CreateFieldExtraction(c)
	require.NoError(t, err)
	assert.Equal(t, http.StatusCreated, rec.Code)

	// Parse response
	var resp queryapi.FieldExtractionResponse
	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	assert.Len(t, resp.ArrayFields, 0)
}

func TestCreateFieldExtraction_LargeArrayFields(t *testing.T) {
	ctrl, _, documentID, _ := setupFieldExtractionsTestController(t)

	// Create 100 array field items
	arrayFields := make([]queryapi.ArrayFieldItem, 100)
	for i := range arrayFields {
		title := fmt.Sprintf("Exhibit %d", i)
		page := fmt.Sprintf("%d", i+1)
		arrayFields[i] = queryapi.ArrayFieldItem{
			ExhibitTitle: &title,
			ExhibitPage:  &page,
		}
	}

	reqBody := queryapi.FieldExtractionRequest{
		DocumentId: queryapi.DocumentID(documentID),
		CreatedBy:  openapi_types.Email("test@example.com"),
		SingleFields: queryapi.SingleFields{
			FileName:      ptr("large_array.pdf"),
			ContractTitle: ptr("Large Array Contract"),
		},
		ArrayFields: arrayFields,
	}

	body, err := json.Marshal(reqBody)
	require.NoError(t, err)

	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	err = ctrl.CreateFieldExtraction(c)
	require.NoError(t, err)
	assert.Equal(t, http.StatusCreated, rec.Code)

	// Parse response
	var resp queryapi.FieldExtractionResponse
	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	assert.Len(t, resp.ArrayFields, 100)
	assert.Equal(t, "Exhibit 0", *resp.ArrayFields[0].ExhibitTitle)
	assert.Equal(t, "Exhibit 99", *resp.ArrayFields[99].ExhibitTitle)
}

func TestCreateFieldExtraction_VersionIncrement(t *testing.T) {
	ctrl, cfg, documentID, _ := setupFieldExtractionsTestController(t)

	// Create first version via API
	reqBody := queryapi.FieldExtractionRequest{
		DocumentId: queryapi.DocumentID(documentID),
		CreatedBy:  openapi_types.Email("user1@example.com"),
		SingleFields: queryapi.SingleFields{
			ContractTitle: ptr("Version 1"),
		},
		ArrayFields: []queryapi.ArrayFieldItem{},
	}

	body, _ := json.Marshal(reqBody)
	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	err := ctrl.CreateFieldExtraction(c)
	require.NoError(t, err)
	assert.Equal(t, http.StatusCreated, rec.Code)

	var resp1 queryapi.FieldExtractionResponse
	_ = json.Unmarshal(rec.Body.Bytes(), &resp1)
	assert.Equal(t, int32(1), resp1.Version)

	// Create second version
	reqBody.CreatedBy = openapi_types.Email("user2@example.com")
	reqBody.SingleFields.ContractTitle = ptr("Version 2")
	body, _ = json.Marshal(reqBody)

	req = httptest.NewRequest(http.MethodPost, "/field-extractions", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec = httptest.NewRecorder()
	c = e.NewContext(req, rec)

	err = ctrl.CreateFieldExtraction(c)
	require.NoError(t, err)
	assert.Equal(t, http.StatusCreated, rec.Code)

	var resp2 queryapi.FieldExtractionResponse
	_ = json.Unmarshal(rec.Body.Bytes(), &resp2)
	assert.Equal(t, int32(2), resp2.Version)

	// GetCurrentFieldExtraction should return version 2
	req = httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions?documentId=%s", documentID), nil)
	rec = httptest.NewRecorder()
	c = e.NewContext(req, rec)

	_ = cfg // Keep cfg used for test context

	params := queryapi.GetCurrentFieldExtractionParams{
		DocumentId: queryapi.DocumentID(documentID),
	}
	err = ctrl.GetCurrentFieldExtraction(c, params)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)

	var currentResp queryapi.FieldExtractionResponse
	_ = json.Unmarshal(rec.Body.Bytes(), &currentResp)
	assert.Equal(t, int32(2), currentResp.Version)
	assert.Equal(t, "Version 2", *currentResp.SingleFields.ContractTitle)
}

func TestGetFieldExtractionByVersion_Success(t *testing.T) {
	ctrl, cfg, documentID, _ := setupFieldExtractionsTestController(t)
	ctx := t.Context()

	// Create multiple versions with dates for coverage
	svc := fieldextraction.New(cfg)
	filename := "test.pdf"

	for i := 1; i <= 3; i++ {
		contractTitle := fmt.Sprintf("Contract Version %d", i)
		clientName := fmt.Sprintf("Client %d", i)
		// Include dates to test date conversion coverage
		effectiveDate := pgtype.Date{Time: time.Date(2024, 1, i, 0, 0, 0, 0, time.UTC), Valid: true}
		terminationDate := pgtype.Date{Time: time.Date(2024, 12, i, 0, 0, 0, 0, time.UTC), Valid: true}
		_, err := svc.CreateFieldExtraction(ctx, &fieldextraction.CreateFieldExtractionInput{
			DocumentID: documentID,
			SingleFields: &repository.AddFieldExtractionParams{
				Documentid:                 documentID,
				Filename:                   &filename,
				Contracttitle:              &contractTitle,
				Clientname:                 &clientName,
				Aaretederivedeffectivedt:   effectiveDate,
				Aaretederivedterminationdt: terminationDate,
				Createdby:                  fmt.Sprintf("user%d@example.com", i),
			},
			ArrayFields: []*repository.AddFieldExtractionArrayFieldParams{
				{
					Exhibittitle: ptr(fmt.Sprintf("Exhibit V%d", i)),
				},
			},
		})
		require.NoError(t, err)
	}

	// Test retrieving version 2
	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions/version?documentId=%s&version=2", documentID), nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetFieldExtractionByVersionParams{
		DocumentId: queryapi.DocumentID(documentID),
		Version:    2,
	}

	err := ctrl.GetFieldExtractionByVersion(c, params)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)

	// Parse response
	var resp queryapi.FieldExtractionResponse
	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	// Verify we got version 2
	assert.Equal(t, documentID, uuid.UUID(resp.DocumentId))
	assert.Equal(t, int32(2), resp.Version)
	assert.Equal(t, "user2@example.com", string(resp.CreatedBy))
	assert.Equal(t, "Contract Version 2", *resp.SingleFields.ContractTitle)
	assert.Equal(t, "Client 2", *resp.SingleFields.ClientName)
	// Verify dates are returned correctly
	require.NotNil(t, resp.SingleFields.AareteDerivedEffectiveDt, "Expected effective date in response")
	require.NotNil(t, resp.SingleFields.AareteDerivedTerminationDt, "Expected termination date in response")
	assert.Equal(t, 2024, resp.SingleFields.AareteDerivedEffectiveDt.Year())
	assert.Equal(t, time.January, resp.SingleFields.AareteDerivedEffectiveDt.Month())
	assert.Equal(t, 2, resp.SingleFields.AareteDerivedEffectiveDt.Day())
	require.Len(t, resp.ArrayFields, 1)
	assert.Equal(t, "Exhibit V2", *resp.ArrayFields[0].ExhibitTitle)

	// Also test retrieving version 1
	req = httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions/version?documentId=%s&version=1", documentID), nil)
	rec = httptest.NewRecorder()
	c = e.NewContext(req, rec)

	params.Version = 1
	err = ctrl.GetFieldExtractionByVersion(c, params)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)

	err = json.Unmarshal(rec.Body.Bytes(), &resp)
	require.NoError(t, err)

	assert.Equal(t, int32(1), resp.Version)
	assert.Equal(t, "Contract Version 1", *resp.SingleFields.ContractTitle)
	assert.Equal(t, "Exhibit V1", *resp.ArrayFields[0].ExhibitTitle)
}

func TestGetFieldExtractionByVersion_NotFound(t *testing.T) {
	ctrl, cfg, documentID, _ := setupFieldExtractionsTestController(t)
	ctx := t.Context()

	// Create only one version
	svc := fieldextraction.New(cfg)
	filename := "test.pdf"
	contractTitle := "Test Contract"
	_, err := svc.CreateFieldExtraction(ctx, &fieldextraction.CreateFieldExtractionInput{
		DocumentID: documentID,
		SingleFields: &repository.AddFieldExtractionParams{
			Documentid:    documentID,
			Filename:      &filename,
			Contracttitle: &contractTitle,
			Createdby:     "user@example.com",
		},
		ArrayFields: []*repository.AddFieldExtractionArrayFieldParams{},
	})
	require.NoError(t, err)

	// Try to get version 5 (which doesn't exist)
	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions/version?documentId=%s&version=5", documentID), nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetFieldExtractionByVersionParams{
		DocumentId: queryapi.DocumentID(documentID),
		Version:    5,
	}

	err = ctrl.GetFieldExtractionByVersion(c, params)
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusNotFound, httpErr.Code)
}

func TestGetFieldExtractionByVersion_InvalidDocumentID(t *testing.T) {
	ctrl, _, _, _ := setupFieldExtractionsTestController(t)

	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, "/field-extractions/version?documentId=&version=1", nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetFieldExtractionByVersionParams{
		DocumentId: queryapi.DocumentID(uuid.Nil),
		Version:    1,
	}

	err := ctrl.GetFieldExtractionByVersion(c, params)
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code)
}

func TestGetFieldExtractionByVersion_InvalidVersion(t *testing.T) {
	ctrl, _, documentID, _ := setupFieldExtractionsTestController(t)

	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions/version?documentId=%s&version=0", documentID), nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetFieldExtractionByVersionParams{
		DocumentId: queryapi.DocumentID(documentID),
		Version:    0, // Invalid: version must be >= 1
	}

	err := ctrl.GetFieldExtractionByVersion(c, params)
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code)
}

func TestGetFieldExtractionByVersion_NoExtractions(t *testing.T) {
	ctrl, _, documentID, _ := setupFieldExtractionsTestController(t)

	// Document exists but has no field extractions
	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, fmt.Sprintf("/field-extractions/version?documentId=%s&version=1", documentID), nil)
	rec := httptest.NewRecorder()
	c := e.NewContext(req, rec)

	params := queryapi.GetFieldExtractionByVersionParams{
		DocumentId: queryapi.DocumentID(documentID),
		Version:    1,
	}

	err := ctrl.GetFieldExtractionByVersion(c, params)
	require.Error(t, err)
	httpErr, ok := err.(*echo.HTTPError)
	require.True(t, ok)
	assert.Equal(t, http.StatusNotFound, httpErr.Code)
}

// Helper function to create string pointer
func ptr(s string) *string {
	return &s
}