package app_test

import (
	"context"
	"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/models"
	"git.eeqj.de/sneak/upaas/internal/service/app"
)

func setupTestService(t *testing.T) (*app.Service, func()) {
	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",
	}

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

	svc, err := app.New(fx.Lifecycle(nil), app.ServiceParams{
		Logger:   loggerInst,
		Database: dbInst,
	})
	require.NoError(t, err)

	// t.TempDir() automatically cleans up after test
	cleanup := func() {}

	return svc, cleanup
}

// deleteItemTestHelper is a generic helper for testing delete operations.
// It creates an app, adds an item, verifies it exists, deletes it, and verifies it's gone.
func deleteItemTestHelper(
	t *testing.T,
	appName string,
	addItem func(ctx context.Context, svc *app.Service, appID string) error,
	getCount func(ctx context.Context, application *models.App) (int, error),
	deleteItem func(ctx context.Context, svc *app.Service, application *models.App) error,
) {
	t.Helper()

	svc, cleanup := setupTestService(t)
	defer cleanup()

	createdApp, err := svc.CreateApp(context.Background(), app.CreateAppInput{
		Name:    appName,
		RepoURL: "git@example.com:user/repo.git",
	})
	require.NoError(t, err)

	err = addItem(context.Background(), svc, createdApp.ID)
	require.NoError(t, err)

	count, err := getCount(context.Background(), createdApp)
	require.NoError(t, err)
	require.Equal(t, 1, count)

	err = deleteItem(context.Background(), svc, createdApp)
	require.NoError(t, err)

	count, err = getCount(context.Background(), createdApp)
	require.NoError(t, err)
	assert.Equal(t, 0, count)
}

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

	svc, cleanup := setupTestService(t)
	defer cleanup()

	input := app.CreateAppInput{
		Name:           "test-app",
		RepoURL:        "git@gitea.example.com:user/repo.git",
		Branch:         "main",
		DockerfilePath: "Dockerfile",
	}

	createdApp, err := svc.CreateApp(context.Background(), input)
	require.NoError(t, err)
	require.NotNil(t, createdApp)

	assert.Equal(t, "test-app", createdApp.Name)
	assert.Equal(t, "git@gitea.example.com:user/repo.git", createdApp.RepoURL)
	assert.Equal(t, "main", createdApp.Branch)
	assert.Equal(t, "Dockerfile", createdApp.DockerfilePath)
	assert.NotEmpty(t, createdApp.ID)
	assert.NotEmpty(t, createdApp.WebhookSecret)
	assert.NotEmpty(t, createdApp.SSHPrivateKey)
	assert.NotEmpty(t, createdApp.SSHPublicKey)
	assert.Contains(t, createdApp.SSHPrivateKey, "-----BEGIN OPENSSH PRIVATE KEY-----")
	assert.Contains(t, createdApp.SSHPublicKey, "ssh-ed25519")
	assert.Equal(t, models.AppStatusPending, createdApp.Status)
}

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

	svc, cleanup := setupTestService(t)
	defer cleanup()

	input := app.CreateAppInput{
		Name:    "test-app-defaults",
		RepoURL: "git@gitea.example.com:user/repo.git",
	}

	createdApp, err := svc.CreateApp(context.Background(), input)
	require.NoError(t, err)

	assert.Equal(t, "main", createdApp.Branch)
	assert.Equal(t, "Dockerfile", createdApp.DockerfilePath)
}

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

	svc, cleanup := setupTestService(t)
	defer cleanup()

	input := app.CreateAppInput{
		Name:          "test-app-full",
		RepoURL:       "git@gitea.example.com:user/repo.git",
		Branch:        "develop",
		DockerNetwork: "my-network",
		NtfyTopic:     "https://ntfy.sh/my-topic",
		SlackWebhook:  "https://hooks.slack.com/services/xxx",
	}

	createdApp, err := svc.CreateApp(context.Background(), input)
	require.NoError(t, err)

	assert.True(t, createdApp.DockerNetwork.Valid)
	assert.Equal(t, "my-network", createdApp.DockerNetwork.String)
	assert.True(t, createdApp.NtfyTopic.Valid)
	assert.Equal(t, "https://ntfy.sh/my-topic", createdApp.NtfyTopic.String)
	assert.True(t, createdApp.SlackWebhook.Valid)
}

func TestUpdateApp(testingT *testing.T) {
	testingT.Parallel()

	testingT.Run("updates app fields", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		createdApp, err := svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:    "original-name",
			RepoURL: "git@example.com:user/repo.git",
		})
		require.NoError(t, err)

		err = svc.UpdateApp(context.Background(), createdApp, app.UpdateAppInput{
			Name:           "updated-name",
			RepoURL:        "git@example.com:user/new-repo.git",
			Branch:         "develop",
			DockerfilePath: "docker/Dockerfile",
			DockerNetwork:  "prod-network",
		})
		require.NoError(t, err)

		// Reload and verify
		reloaded, err := svc.GetApp(context.Background(), createdApp.ID)
		require.NoError(t, err)

		assert.Equal(t, "updated-name", reloaded.Name)
		assert.Equal(t, "git@example.com:user/new-repo.git", reloaded.RepoURL)
		assert.Equal(t, "develop", reloaded.Branch)
		assert.Equal(t, "docker/Dockerfile", reloaded.DockerfilePath)
		assert.Equal(t, "prod-network", reloaded.DockerNetwork.String)
	})

	testingT.Run("clears optional fields when empty", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		createdApp, err := svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:         "test-clear",
			RepoURL:      "git@example.com:user/repo.git",
			NtfyTopic:    "https://ntfy.sh/topic",
			SlackWebhook: "https://slack.com/hook",
		})
		require.NoError(t, err)

		err = svc.UpdateApp(context.Background(), createdApp, app.UpdateAppInput{
			Name:    "test-clear",
			RepoURL: "git@example.com:user/repo.git",
			Branch:  "main",
		})
		require.NoError(t, err)

		reloaded, err := svc.GetApp(context.Background(), createdApp.ID)
		require.NoError(t, err)

		assert.False(t, reloaded.NtfyTopic.Valid)
		assert.False(t, reloaded.SlackWebhook.Valid)
	})
}

func TestDeleteApp(testingT *testing.T) {
	testingT.Parallel()

	testingT.Run("deletes app and returns nil on lookup", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		createdApp, err := svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:    "to-delete",
			RepoURL: "git@example.com:user/repo.git",
		})
		require.NoError(t, err)

		err = svc.DeleteApp(context.Background(), createdApp)
		require.NoError(t, err)

		deleted, err := svc.GetApp(context.Background(), createdApp.ID)
		require.NoError(t, err)
		assert.Nil(t, deleted)
	})
}

func TestGetApp(testingT *testing.T) {
	testingT.Parallel()

	testingT.Run("finds existing app", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		created, err := svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:    "findable-app",
			RepoURL: "git@example.com:user/repo.git",
		})
		require.NoError(t, err)

		found, err := svc.GetApp(context.Background(), created.ID)
		require.NoError(t, err)
		require.NotNil(t, found)

		assert.Equal(t, created.ID, found.ID)
		assert.Equal(t, "findable-app", found.Name)
	})

	testingT.Run("returns nil for non-existent app", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		found, err := svc.GetApp(context.Background(), "non-existent-id")
		require.NoError(t, err)
		assert.Nil(t, found)
	})
}

func TestGetAppByWebhookSecret(testingT *testing.T) {
	testingT.Parallel()

	testingT.Run("finds app by webhook secret", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		created, err := svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:    "webhook-app",
			RepoURL: "git@example.com:user/repo.git",
		})
		require.NoError(t, err)

		found, err := svc.GetAppByWebhookSecret(context.Background(), created.WebhookSecret)
		require.NoError(t, err)
		require.NotNil(t, found)

		assert.Equal(t, created.ID, found.ID)
	})

	testingT.Run("returns nil for invalid secret", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		found, err := svc.GetAppByWebhookSecret(context.Background(), "invalid-secret")
		require.NoError(t, err)
		assert.Nil(t, found)
	})
}

func TestListApps(testingT *testing.T) {
	testingT.Parallel()

	testingT.Run("returns empty list when no apps", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		apps, err := svc.ListApps(context.Background())
		require.NoError(t, err)
		assert.Empty(t, apps)
	})

	testingT.Run("returns all apps ordered by name", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		_, err := svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:    "charlie",
			RepoURL: "git@example.com:user/c.git",
		})
		require.NoError(t, err)

		_, err = svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:    "alpha",
			RepoURL: "git@example.com:user/a.git",
		})
		require.NoError(t, err)

		_, err = svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:    "bravo",
			RepoURL: "git@example.com:user/b.git",
		})
		require.NoError(t, err)

		apps, err := svc.ListApps(context.Background())
		require.NoError(t, err)
		require.Len(t, apps, 3)

		assert.Equal(t, "alpha", apps[0].Name)
		assert.Equal(t, "bravo", apps[1].Name)
		assert.Equal(t, "charlie", apps[2].Name)
	})
}

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

	svc, cleanup := setupTestService(t)
	defer cleanup()

	createdApp, err := svc.CreateApp(context.Background(), app.CreateAppInput{
		Name:    "env-test",
		RepoURL: "git@example.com:user/repo.git",
	})
	require.NoError(t, err)

	err = svc.AddEnvVar(
		context.Background(),
		createdApp.ID,
		"DATABASE_URL",
		"postgres://localhost/db",
	)
	require.NoError(t, err)

	err = svc.AddEnvVar(
		context.Background(),
		createdApp.ID,
		"API_KEY",
		"secret123",
	)
	require.NoError(t, err)

	envVars, err := createdApp.GetEnvVars(context.Background())
	require.NoError(t, err)
	require.Len(t, envVars, 2)

	keys := make(map[string]string)
	for _, envVar := range envVars {
		keys[envVar.Key] = envVar.Value
	}

	assert.Equal(t, "postgres://localhost/db", keys["DATABASE_URL"])
	assert.Equal(t, "secret123", keys["API_KEY"])
}

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

	deleteItemTestHelper(t, "env-delete-test",
		func(ctx context.Context, svc *app.Service, appID string) error {
			return svc.AddEnvVar(ctx, appID, "TO_DELETE", "value")
		},
		func(ctx context.Context, application *models.App) (int, error) {
			envVars, err := application.GetEnvVars(ctx)

			return len(envVars), err
		},
		func(ctx context.Context, svc *app.Service, application *models.App) error {
			envVars, err := application.GetEnvVars(ctx)
			if err != nil {
				return err
			}

			return svc.DeleteEnvVar(ctx, envVars[0].ID)
		},
	)
}

func TestLabels(testingT *testing.T) {
	testingT.Parallel()

	testingT.Run("adds and retrieves labels", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		createdApp, err := svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:    "label-test",
			RepoURL: "git@example.com:user/repo.git",
		})
		require.NoError(t, err)

		err = svc.AddLabel(context.Background(), createdApp.ID, "traefik.enable", "true")
		require.NoError(t, err)

		err = svc.AddLabel(
			context.Background(),
			createdApp.ID,
			"com.example.env",
			"production",
		)
		require.NoError(t, err)

		labels, err := createdApp.GetLabels(context.Background())
		require.NoError(t, err)
		require.Len(t, labels, 2)
	})

	testingT.Run("deletes label", func(t *testing.T) {
		t.Parallel()

		deleteItemTestHelper(t, "label-delete-test",
			func(ctx context.Context, svc *app.Service, appID string) error {
				return svc.AddLabel(ctx, appID, "to.delete", "value")
			},
			func(ctx context.Context, application *models.App) (int, error) {
				labels, err := application.GetLabels(ctx)

				return len(labels), err
			},
			func(ctx context.Context, svc *app.Service, application *models.App) error {
				labels, err := application.GetLabels(ctx)
				if err != nil {
					return err
				}

				return svc.DeleteLabel(ctx, labels[0].ID)
			},
		)
	})
}

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

	svc, cleanup := setupTestService(t)
	defer cleanup()

	createdApp, err := svc.CreateApp(context.Background(), app.CreateAppInput{
		Name:    "volume-test",
		RepoURL: "git@example.com:user/repo.git",
	})
	require.NoError(t, err)

	err = svc.AddVolume(
		context.Background(),
		createdApp.ID,
		"/host/data",
		"/app/data",
		false,
	)
	require.NoError(t, err)

	err = svc.AddVolume(
		context.Background(),
		createdApp.ID,
		"/host/config",
		"/app/config",
		true,
	)
	require.NoError(t, err)

	volumes, err := createdApp.GetVolumes(context.Background())
	require.NoError(t, err)
	require.Len(t, volumes, 2)

	// Find readonly volume
	var readonlyVolume *models.Volume

	for _, vol := range volumes {
		if vol.ReadOnly {
			readonlyVolume = vol

			break
		}
	}

	require.NotNil(t, readonlyVolume)
	assert.Equal(t, "/host/config", readonlyVolume.HostPath)
	assert.Equal(t, "/app/config", readonlyVolume.ContainerPath)
}

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

	svc, cleanup := setupTestService(t)
	defer cleanup()

	createdApp, err := svc.CreateApp(context.Background(), app.CreateAppInput{
		Name:    "volume-delete-test",
		RepoURL: "git@example.com:user/repo.git",
	})
	require.NoError(t, err)

	err = svc.AddVolume(
		context.Background(),
		createdApp.ID,
		"/host/path",
		"/container/path",
		false,
	)
	require.NoError(t, err)

	volumes, err := createdApp.GetVolumes(context.Background())
	require.NoError(t, err)
	require.Len(t, volumes, 1)

	err = svc.DeleteVolume(context.Background(), volumes[0].ID)
	require.NoError(t, err)

	volumes, err = createdApp.GetVolumes(context.Background())
	require.NoError(t, err)
	assert.Empty(t, volumes)
}

func TestUpdateAppStatus(testingT *testing.T) {
	testingT.Parallel()

	testingT.Run("updates app status", func(t *testing.T) {
		t.Parallel()

		svc, cleanup := setupTestService(t)
		defer cleanup()

		createdApp, err := svc.CreateApp(context.Background(), app.CreateAppInput{
			Name:    "status-test",
			RepoURL: "git@example.com:user/repo.git",
		})
		require.NoError(t, err)
		assert.Equal(t, models.AppStatusPending, createdApp.Status)

		err = svc.UpdateAppStatus(
			context.Background(),
			createdApp,
			models.AppStatusBuilding,
		)
		require.NoError(t, err)

		reloaded, err := svc.GetApp(context.Background(), createdApp.ID)
		require.NoError(t, err)
		assert.Equal(t, models.AppStatusBuilding, reloaded.Status)
	})
}