package backup

import (
	"context"
	"fmt"
	"log"
	"os"
	"os/exec"
)

// RsyncStrategy implements the backup strategy using rsync
type RsyncStrategy struct {
	Options     string
	Destination Destination
}

// NewRsyncStrategy creates a new rsync strategy
func NewRsyncStrategy(options string, destination Destination) *RsyncStrategy {
	return &RsyncStrategy{
		Options:     options,
		Destination: destination,
	}
}

// Execute performs the rsync backup
func (s *RsyncStrategy) Execute(ctx context.Context, serviceName, directory string) error {
	log.Printf("Performing rsync backup for %s", serviceName)

	// Build rsync command
	dst := s.Destination
	sshKeyOption := ""

	// Without
	if dst.SSHKey != "" {
		sshKeyOption = fmt.Sprintf("-e 'ssh -i %s'", dst.SSHKey)
	}

	destination := fmt.Sprintf("%s:%s", dst.Host, dst.Path)
	rsyncCmd := fmt.Sprintf("rsync %s %s %s %s",
		s.Options,
		sshKeyOption,
		directory,
		destination)

	// Run rsync command
	log.Printf("Running: %s", rsyncCmd)
	cmd := exec.CommandContext(ctx, "sh", "-c", rsyncCmd)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	return cmd.Run()
}