package deploy

import (
	"context"
	"fmt"
	"log/slog"
	"os"
	"path/filepath"
	"strings"

	"git.eeqj.de/sneak/upaas/internal/config"
	"git.eeqj.de/sneak/upaas/internal/docker"
	"git.eeqj.de/sneak/upaas/internal/models"
)

// NewTestService creates a Service with minimal dependencies for testing.
func NewTestService(log *slog.Logger) *Service {
	return &Service{
		log: log,
	}
}

// CancelActiveDeploy exposes cancelActiveDeploy for testing.
func (svc *Service) CancelActiveDeploy(appID string) {
	svc.cancelActiveDeploy(appID)
}

// RegisterActiveDeploy registers an active deploy for testing.
func (svc *Service) RegisterActiveDeploy(appID string, cancel context.CancelFunc, done chan struct{}) {
	svc.activeDeploys.Store(appID, &activeDeploy{cancel: cancel, done: done})
}

// TryLockApp exposes tryLockApp for testing.
func (svc *Service) TryLockApp(appID string) bool {
	return svc.tryLockApp(appID)
}

// UnlockApp exposes unlockApp for testing.
func (svc *Service) UnlockApp(appID string) {
	svc.unlockApp(appID)
}

// NewTestServiceWithConfig creates a Service with config and docker client for testing.
func NewTestServiceWithConfig(log *slog.Logger, cfg *config.Config, dockerClient *docker.Client) *Service {
	return &Service{
		log:    log,
		config: cfg,
		docker: dockerClient,
	}
}

// CleanupCancelledDeploy exposes the build directory cleanup portion of
// cleanupCancelledDeploy for testing. It removes build directories matching
// the deployment ID prefix.
func (svc *Service) CleanupCancelledDeploy(
	_ context.Context,
	appName string,
	deploymentID int64,
	_ string,
) {
	// We can't create real models.App/Deployment in tests easily,
	// so we test the build dir cleanup portion directly.
	buildDir := svc.GetBuildDir(appName)

	entries, err := os.ReadDir(buildDir)
	if err != nil {
		return
	}

	prefix := fmt.Sprintf("%d-", deploymentID)

	for _, entry := range entries {
		if entry.IsDir() && strings.HasPrefix(entry.Name(), prefix) {
			dirPath := filepath.Join(buildDir, entry.Name())
			_ = os.RemoveAll(dirPath)
		}
	}
}

// GetBuildDirExported exposes GetBuildDir for testing.
func (svc *Service) GetBuildDirExported(appName string) string {
	return svc.GetBuildDir(appName)
}

// BuildContainerOptionsExported exposes buildContainerOptions for testing.
func (svc *Service) BuildContainerOptionsExported(
	ctx context.Context,
	app *models.App,
	imageID string,
) (docker.CreateContainerOptions, error) {
	return svc.buildContainerOptions(ctx, app, imageID)
}