//go:build test

package admin

import (
	"bytes"
	"context"
	"net/http"
	"net/http/httptest"
	"testing"

	"crussell/testutils"
	"crussell/testutils/fixtures"

	"github.com/go-chi/chi/v5"
)

func TestPatchTests_CRUD(t *testing.T) {

	ctx, tx := testutils.SetupTestTx(t)
	// Create a service to link
	serviceID, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	req := CreatePatchTestRequest{
		Name:                "Test Patch Test",
		Description:         strPtr("Description"),
		NoticeDurationHours: 24,
		ExpiryMonths:        6,
		ServiceIDs:          []string{serviceID},
	}
	w := makeAdminRequest(http.HandlerFunc(CreatePatchTest), "POST", "/api/admin/patch-tests", req, ctx)
	if w.Code != http.StatusCreated {
		t.Fatalf("expected 201, got %d", w.Code)
	}

	var created struct {
		ID string `json:"id"`
	}
	parseResponseBody(w, &created)

	w = makeAdminRequest(http.HandlerFunc(GetPatchTests), "GET", "/api/admin/patch-tests", nil, ctx)
	if w.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d", w.Code)
	}

	var list []PatchTest
	parseResponseBody(w, &list)
	if len(list) != 1 {
		t.Errorf("expected 1 patch test, got %d", len(list))
	}

	newName := "Updated Name"
	updateReq := UpdatePatchTestRequest{Name: &newName}
	w = makeAdminRequest(http.HandlerFunc(UpdatePatchTest), "PUT", "/api/admin/patch-tests/"+created.ID, updateReq, ctx)
	if w.Code != http.StatusNoContent {
		t.Fatalf("expected 204, got %d, body: %s", w.Code, w.Body.String())
	}

	w = makeAdminRequest(http.HandlerFunc(DeletePatchTest), "DELETE", "/api/admin/patch-tests/"+created.ID, nil, ctx)
	if w.Code != http.StatusNoContent {
		t.Fatalf("expected 204, got %d", w.Code)
	}
}

func strPtr(s string) *string {
	return &s
}

// =============================================================================
// Create Patch Test - Validation Tests
// =============================================================================

func TestCreatePatchTest_ValidationErrors(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	handler := http.HandlerFunc(CreatePatchTest)

	t.Run("empty_name", func(t *testing.T) {
		req := CreatePatchTestRequest{
			Name:                "",
			NoticeDurationHours: 24,
			ExpiryMonths:        6,
		}
		w := makeAdminRequest(handler, "POST", "/api/admin/patch-tests", req, ctx)
		if w.Code != http.StatusBadRequest {
			t.Errorf("expected 400 for empty name, got %d. body: %s", w.Code, w.Body.String())
		}
	})

	_, err := tx.Exec(ctx, `SELECT 1`)
	if err != nil {
		t.Fatalf("tx check failed: %v", err)
	}
}

// =============================================================================
// Update Patch Test - Error Tests
// =============================================================================

func TestUpdatePatchTest_NotFound(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)
	serviceID, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	createReq := CreatePatchTestRequest{
		Name:                "Test",
		NoticeDurationHours: 24,
		ExpiryMonths:        6,
		ServiceIDs:          []string{serviceID},
	}
	w := makeAdminRequest(http.HandlerFunc(CreatePatchTest), "POST", "/api/admin/patch-tests", createReq, ctx)
	if w.Code != http.StatusCreated {
		t.Fatalf("failed to create patch test: %d", w.Code)
	}

	newName := "Updated"
	updateReq := UpdatePatchTestRequest{Name: &newName}
	w = makeAdminRequest(http.HandlerFunc(UpdatePatchTest), "PUT", "/api/admin/patch-tests/nonexistent-id", updateReq, ctx)
	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for nonexistent patch test, got %d. body: %s", w.Code, w.Body.String())
	}
}

// =============================================================================
// Delete Patch Test - Error Tests
// =============================================================================

func TestDeletePatchTest_NotFound(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)
	serviceID, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	createReq := CreatePatchTestRequest{
		Name:                "Test",
		NoticeDurationHours: 24,
		ExpiryMonths:        6,
		ServiceIDs:          []string{serviceID},
	}
	w := makeAdminRequest(http.HandlerFunc(CreatePatchTest), "POST", "/api/admin/patch-tests", createReq, ctx)
	if w.Code != http.StatusCreated {
		t.Fatalf("failed to create patch test: %d", w.Code)
	}

	w = makeAdminRequest(http.HandlerFunc(DeletePatchTest), "DELETE", "/api/admin/patch-tests/nonexistent-id", nil, ctx)
	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for nonexistent patch test, got %d. body: %s", w.Code, w.Body.String())
	}
}

// =============================================================================
// Update Patch Test - Individual Field Update Tests
// =============================================================================

func TestUpdatePatchTest_UpdateDescription(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)
	serviceID, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	createReq := CreatePatchTestRequest{
		Name:                "Test",
		NoticeDurationHours: 24,
		ExpiryMonths:        6,
		ServiceIDs:          []string{serviceID},
	}
	w := makeAdminRequest(http.HandlerFunc(CreatePatchTest), "POST", "/api/admin/patch-tests", createReq, ctx)
	if w.Code != http.StatusCreated {
		t.Fatalf("failed to create patch test: %d", w.Code)
	}

	var created struct {
		ID string `json:"id"`
	}
	parseResponseBody(w, &created)

	updateReq := UpdatePatchTestRequest{Description: strPtr("Updated Description")}
	w = makeAdminRequest(http.HandlerFunc(UpdatePatchTest), "PUT", "/api/admin/patch-tests/"+created.ID, updateReq, ctx)
	if w.Code != http.StatusNoContent {
		t.Fatalf("expected 204, got %d, body: %s", w.Code, w.Body.String())
	}
}

func TestUpdatePatchTest_UpdateNoticeDuration(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)
	serviceID, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	createReq := CreatePatchTestRequest{
		Name:                "Test",
		NoticeDurationHours: 24,
		ExpiryMonths:        6,
		ServiceIDs:          []string{serviceID},
	}
	w := makeAdminRequest(http.HandlerFunc(CreatePatchTest), "POST", "/api/admin/patch-tests", createReq, ctx)
	if w.Code != http.StatusCreated {
		t.Fatalf("failed to create patch test: %d", w.Code)
	}

	var created struct {
		ID string `json:"id"`
	}
	parseResponseBody(w, &created)

	noticeDuration := 48
	updateReq := UpdatePatchTestRequest{NoticeDurationHours: &noticeDuration}
	w = makeAdminRequest(http.HandlerFunc(UpdatePatchTest), "PUT", "/api/admin/patch-tests/"+created.ID, updateReq, ctx)
	if w.Code != http.StatusNoContent {
		t.Fatalf("expected 204, got %d, body: %s", w.Code, w.Body.String())
	}
}

func TestUpdatePatchTest_UpdateExpiryMonths(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)
	serviceID, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	createReq := CreatePatchTestRequest{
		Name:                "Test",
		NoticeDurationHours: 24,
		ExpiryMonths:        6,
		ServiceIDs:          []string{serviceID},
	}
	w := makeAdminRequest(http.HandlerFunc(CreatePatchTest), "POST", "/api/admin/patch-tests", createReq, ctx)
	if w.Code != http.StatusCreated {
		t.Fatalf("failed to create patch test: %d", w.Code)
	}

	var created struct {
		ID string `json:"id"`
	}
	parseResponseBody(w, &created)

	expiryMonths := 12
	updateReq := UpdatePatchTestRequest{ExpiryMonths: &expiryMonths}
	w = makeAdminRequest(http.HandlerFunc(UpdatePatchTest), "PUT", "/api/admin/patch-tests/"+created.ID, updateReq, ctx)
	if w.Code != http.StatusNoContent {
		t.Fatalf("expected 204, got %d, body: %s", w.Code, w.Body.String())
	}
}

func TestUpdatePatchTest_UpdateServiceIDs(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)
	serviceID, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	createReq := CreatePatchTestRequest{
		Name:                "Test",
		NoticeDurationHours: 24,
		ExpiryMonths:        6,
		ServiceIDs:          []string{serviceID},
	}
	w := makeAdminRequest(http.HandlerFunc(CreatePatchTest), "POST", "/api/admin/patch-tests", createReq, ctx)
	if w.Code != http.StatusCreated {
		t.Fatalf("failed to create patch test: %d", w.Code)
	}

	var created struct {
		ID string `json:"id"`
	}
	parseResponseBody(w, &created)

	updateReq := UpdatePatchTestRequest{ServiceIDs: []string{serviceID}}
	w = makeAdminRequest(http.HandlerFunc(UpdatePatchTest), "PUT", "/api/admin/patch-tests/"+created.ID, updateReq, ctx)
	if w.Code != http.StatusNoContent {
		t.Fatalf("expected 204, got %d, body: %s", w.Code, w.Body.String())
	}
}

func TestUpdatePatchTest_InvalidJSON(t *testing.T) {
	ctx, _ := testutils.SetupTestTx(t)

	req := httptest.NewRequest("PUT", "/api/admin/patch-tests/abcdef123456", bytes.NewReader([]byte(`{invalid}`)))
	req.Header.Set("Content-Type", "application/json")
	rctx := chi.NewRouteContext()
	rctx.URLParams.Add("id", "abcdef123456")
	ctx = context.WithValue(ctx, chi.RouteCtxKey, rctx)
	req = req.WithContext(ctx)

	w := httptest.NewRecorder()
	http.HandlerFunc(UpdatePatchTest).ServeHTTP(w, req)

	if w.Code != http.StatusBadRequest {
		t.Errorf("expected 400 for invalid JSON, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestUpdatePatchTest_ValidationError(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)
	serviceID, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	createReq := CreatePatchTestRequest{
		Name:                "Test",
		NoticeDurationHours: 24,
		ExpiryMonths:        6,
		ServiceIDs:          []string{serviceID},
	}
	w := makeAdminRequest(http.HandlerFunc(CreatePatchTest), "POST", "/api/admin/patch-tests", createReq, ctx)
	if w.Code != http.StatusCreated {
		t.Fatalf("failed to create patch test: %d", w.Code)
	}

	var created struct {
		ID string `json:"id"`
	}
	parseResponseBody(w, &created)

	var longName string
	for i := 0; i < 201; i++ {
		longName += "a"
	}
	updateReq := UpdatePatchTestRequest{Name: &longName}
	w = makeAdminRequest(http.HandlerFunc(UpdatePatchTest), "PUT", "/api/admin/patch-tests/"+created.ID, updateReq, ctx)
	if w.Code != http.StatusBadRequest {
		t.Errorf("expected 400 for validation error, got %d. body: %s", w.Code, w.Body.String())
	}
}