package queryapi_test

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

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

	"github.com/labstack/echo/v4"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestCreateClient(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	body := queryapi.ClientCreate{
		Name: "example_name",
		Id:   "external_id",
	}

	ctx, rec := createContextWithJSONBody(t, body)

	err := cons.CreateClient(ctx)
	require.NoError(t, err)
	assert.Equal(t, http.StatusCreated, rec.Code)
	assertBody(t, rec, queryapi.ClientIDBody{
		Id: body.Id,
	})

	client, err := cfg.GetDBQueries().GetClient(t.Context(), "external_id")
	require.NoError(t, err)
	assert.Equal(t, "example_name", client.Name)
	assert.Equal(t, "external_id", client.Clientid)
}

func TestGetClient(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	id := "client_id"

	err := cfg.GetDBQueries().CreateClient(t.Context(), &repository.CreateClientParams{
		Clientid: id,
		Name:     "client_name",
	})
	require.NoError(t, err)
	err = cfg.GetDBQueries().AddClientCanSync(t.Context(), &repository.AddClientCanSyncParams{
		Clientid: id,
		Cansync:  true,
	})
	require.NoError(t, err)

	ctx, rec := createContext(t)

	err = cons.GetClient(ctx, id)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)
	assertBody(t, rec, queryapi.DocClient{
		Id:      id,
		Name:    "client_name",
		CanSync: true,
	})
}

func TestUpdateClient(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	id := "client_id"

	err := cfg.GetDBQueries().CreateClient(t.Context(), &repository.CreateClientParams{
		Clientid: id,
		Name:     "client_name",
	})
	require.NoError(t, err)

	newClientName := "new_name"
	body := queryapi.ClientUpdate{
		Name: &newClientName,
	}

	ctx, rec := createContextWithJSONBody(t, body)

	err = cons.UpdateClient(ctx, id)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)
	assert.Empty(t, rec.Body.String())

	client, err := cfg.GetDBQueries().GetClient(t.Context(), "client_id")
	require.NoError(t, err)
	assert.Equal(t, "new_name", client.Name)
}

func TestListClients(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	// Create multiple clients
	clients := []struct {
		id   string
		name string
	}{
		{"client_a", "Alpha Client"},
		{"client_b", "Beta Client"},
		{"client_c", "Charlie Client"},
	}

	for _, c := range clients {
		err := cfg.GetDBQueries().CreateClient(t.Context(), &repository.CreateClientParams{
			Clientid: c.id,
			Name:     c.name,
		})
		require.NoError(t, err)
		err = cfg.GetDBQueries().AddClientCanSync(t.Context(), &repository.AddClientCanSyncParams{
			Clientid: c.id,
			Cansync:  true,
		})
		require.NoError(t, err)
	}

	ctx, rec := createContext(t)

	err := cons.ListClients(ctx)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)

	var response queryapi.ClientListResponse
	err = json.Unmarshal(rec.Body.Bytes(), &response)
	require.NoError(t, err)

	// Verify response
	assert.Equal(t, int32(3), response.TotalCount)
	assert.Len(t, response.Clients, 3)

	// Verify clients are ordered by name (Alpha, Beta, Charlie)
	assert.Equal(t, "Alpha Client", response.Clients[0].Name)
	assert.Equal(t, "Beta Client", response.Clients[1].Name)
	assert.Equal(t, "Charlie Client", response.Clients[2].Name)
}

func TestListClientsEmpty(t *testing.T) {
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	ctx, rec := createContext(t)

	err := cons.ListClients(ctx)
	require.NoError(t, err)
	assert.Equal(t, http.StatusOK, rec.Code)

	var response queryapi.ClientListResponse
	err = json.Unmarshal(rec.Body.Bytes(), &response)
	require.NoError(t, err)

	assert.Equal(t, int32(0), response.TotalCount)
	assert.Empty(t, response.Clients)
}

func initializeTestConfig(t testing.TB, cfg *ControllerConfig) {
	// Reset the singleton config state for testing
	serviceconfig.ResetConfigInitOnceTestOnly()

	// Chatbot config is loaded via env tags during InitializeConfig and
	// has required+notEmpty fields. Provide test placeholder values so
	// the loader accepts the parse; production env supplies real values.
	t.Setenv("CHATBOT_SERVICE_URL", "http://chatbot.test:8000")
	t.Setenv("CHATBOT_API_KEY", "test-api-key")

	// Initialize the base configuration
	err := serviceconfig.InitializeConfig(cfg)
	require.NoError(t, err)

	// Initialize auth configuration with test defaults
	cfg.SetAuthUserPoolID("test-pool-id")
	cfg.SetAuthClientID("test-client-id")
	cfg.SetAuthClientSecret("test-client-secret")
	cfg.SetAuthDomain("https://test-domain.com")
	cfg.SetAuthRegion("us-east-1")

	err = cfg.InitializeAuthConfig("http://localhost:8080", cfg.GetLogger())
	require.NoError(t, err)
}

func createContext(t testing.TB) (echo.Context, *httptest.ResponseRecorder) {
	return createContextWithJSONBody(t, struct{}{})
}

func createContextWithJSONBody(t testing.TB, body interface{}) (echo.Context, *httptest.ResponseRecorder) {
	bodyBytes, err := json.Marshal(body)
	require.NoError(t, err)

	return createContextWithBody(t, bodyBytes)
}

func createContextWithBody(t testing.TB, body []byte) (echo.Context, *httptest.ResponseRecorder) {
	e := echo.New()
	req := httptest.NewRequest(http.MethodPost, "/", bytes.NewReader(body))
	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	rec := httptest.NewRecorder()
	return e.NewContext(req, rec), rec
}

func assertBody[T any](t testing.TB, rec *httptest.ResponseRecorder, expected T) {
	res := getBody[T](t, rec)
	assert.EqualExportedValues(t, expected, res)
}

func getBody[T any](t testing.TB, rec *httptest.ResponseRecorder) T {
	var res T
	err := json.Unmarshal(rec.Body.Bytes(), &res)
	require.NoError(t, err)

	return res
}