package middleware_test

import (
	"net/http"
	"net/http/httptest"
	"path/filepath"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.uber.org/fx"

	"git.eeqj.de/sneak/upaas/internal/config"
	"git.eeqj.de/sneak/upaas/internal/database"
	"git.eeqj.de/sneak/upaas/internal/globals"
	"git.eeqj.de/sneak/upaas/internal/logger"
	"git.eeqj.de/sneak/upaas/internal/middleware"
	"git.eeqj.de/sneak/upaas/internal/models"
	"git.eeqj.de/sneak/upaas/internal/service/auth"
)

// setupMiddleware creates a Middleware with a real SQLite database for
// integration testing.
func setupMiddleware(t *testing.T) (*middleware.Middleware, *auth.Service, *database.Database) {
	t.Helper()

	tmpDir := t.TempDir()

	globals.SetAppname("upaas-test")
	globals.SetVersion("test")

	globalsInst, err := globals.New(fx.Lifecycle(nil))
	require.NoError(t, err)

	loggerInst, err := logger.New(
		fx.Lifecycle(nil),
		logger.Params{Globals: globalsInst},
	)
	require.NoError(t, err)

	cfg := &config.Config{
		Port:          8080,
		DataDir:       tmpDir,
		SessionSecret: "test-secret-key-at-least-32-chars!!",
	}
	_ = filepath.Join(tmpDir, "upaas.db")

	dbInst, err := database.New(fx.Lifecycle(nil), database.Params{
		Logger: loggerInst,
		Config: cfg,
	})
	require.NoError(t, err)

	authSvc, err := auth.New(fx.Lifecycle(nil), auth.ServiceParams{
		Logger:   loggerInst,
		Config:   cfg,
		Database: dbInst,
	})
	require.NoError(t, err)

	mw, err := middleware.New(fx.Lifecycle(nil), middleware.Params{
		Logger:   loggerInst,
		Globals:  globalsInst,
		Config:   cfg,
		Auth:     authSvc,
		Database: dbInst,
	})
	require.NoError(t, err)

	return mw, authSvc, dbInst
}

func TestAPISessionAuth_BearerTokenSetsUserContext(t *testing.T) {
	t.Parallel()

	mw, authSvc, dbInst := setupMiddleware(t)
	ctx := t.Context()

	// Create a user.
	user, err := authSvc.CreateUser(ctx, "testuser", "password123")
	require.NoError(t, err)
	require.NotNil(t, user)

	// Create an API token for the user.
	rawToken, err := models.GenerateToken()
	require.NoError(t, err)

	tokenHash := database.HashAPIToken(rawToken)
	apiToken := models.NewAPIToken(dbInst)
	apiToken.UserID = user.ID
	apiToken.Name = "test-token"
	apiToken.TokenHash = tokenHash

	err = apiToken.Save(ctx)
	require.NoError(t, err)

	// Build a handler behind APISessionAuth that checks user context.
	var gotUser *models.User

	var getUserErr error

	handler := mw.APISessionAuth()(http.HandlerFunc(
		func(w http.ResponseWriter, r *http.Request) {
			gotUser, getUserErr = authSvc.GetCurrentUser(r.Context(), r)

			w.WriteHeader(http.StatusOK)
		},
	))

	// Make request with bearer token.
	req := httptest.NewRequest(http.MethodGet, "/api/test", nil)
	req.Header.Set("Authorization", "Bearer "+rawToken)

	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, req)

	assert.Equal(t, http.StatusOK, rec.Code)
	require.NoError(t, getUserErr)
	require.NotNil(t, gotUser, "GetCurrentUser should return the user for bearer auth")
	assert.Equal(t, user.ID, gotUser.ID)
	assert.Equal(t, "testuser", gotUser.Username)
}

func TestAPISessionAuth_NoBearerTokenReturns401(t *testing.T) {
	t.Parallel()

	mw, _, _ := setupMiddleware(t)

	handler := mw.APISessionAuth()(http.HandlerFunc(
		func(w http.ResponseWriter, _ *http.Request) {
			w.WriteHeader(http.StatusOK)
		},
	))

	req := httptest.NewRequest(http.MethodGet, "/api/test", nil)
	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, req)

	assert.Equal(t, http.StatusUnauthorized, rec.Code)
}

func TestAPISessionAuth_InvalidBearerTokenReturns401(t *testing.T) {
	t.Parallel()

	mw, _, _ := setupMiddleware(t)

	handler := mw.APISessionAuth()(http.HandlerFunc(
		func(w http.ResponseWriter, _ *http.Request) {
			w.WriteHeader(http.StatusOK)
		},
	))

	req := httptest.NewRequest(http.MethodGet, "/api/test", nil)
	req.Header.Set("Authorization", "Bearer invalid-token")

	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, req)

	assert.Equal(t, http.StatusUnauthorized, rec.Code)
}