// Command zfs-client is a simple CLI tool for creating and sending ZFS snapshots.
package main

import (
	"fmt"
	"os"

	"git.ma-al.com/goc_marek/zfs/internal/client"
)

func main() {
	if len(os.Args) < 2 {
		printUsage()
		os.Exit(1)
	}

	// Load configuration from environment and .env file
	config := client.LoadConfig()
	c := client.New(config)

	command := os.Args[1]

	switch command {
	case "snap", "snapshot":
		// Create snapshot and send to server (auto full/incremental)
		// Optional: specify dataset as argument
		targetDataset := ""
		if len(os.Args) > 2 {
			targetDataset = os.Args[2]
			fmt.Printf("→ Using dataset: %s\n", targetDataset)
		}

		fmt.Println("=== Creating and sending snapshot ===\n")

		snapshot, err := c.CreateAndSend(targetDataset)
		if err != nil {
			fmt.Printf("Error: %v\n", err)
			os.Exit(1)
		}

		if snapshot.FullBackup {
			fmt.Println("\n✓ Full backup completed!")
		} else {
			fmt.Println("\n✓ Incremental backup completed!")
		}

	case "status":
		// Check server connection and quota
		if err := c.GetStatus(); err != nil {
			fmt.Printf("Error: %v\n", err)
			os.Exit(1)
		}

	case "help", "-h", "--help":
		printUsage()

	default:
		fmt.Printf("Unknown command: %s\n", command)
		printUsage()
		os.Exit(1)
	}
}

func printUsage() {
	fmt.Println("ZFS Snapshot Backup Client - Simple Version")
	fmt.Println("\nUsage: zfs-client [command] [dataset]")
	fmt.Println("\nCommands:")
	fmt.Println("  snap [dataset]  - Create snapshot and send to server")
	fmt.Println("                    If dataset not specified, uses LOCAL_DATASET from config")
	fmt.Println("  status           - Check server connection and quota")
	fmt.Println("  help             - Show this help message")
	fmt.Println("\nEnvironment Variables (can be set in .env file):")
	fmt.Println("  CLIENT_ID      - Client identifier (default: client1)")
	fmt.Println("  API_KEY        - API key for authentication (default: secret123)")
	fmt.Println("  SERVER_URL     - Backup server URL (default: http://localhost:8080)")
	fmt.Println("  LOCAL_DATASET  - ZFS dataset to backup (default: tank/data)")
	fmt.Println("  COMPRESS       - Enable LZ4 compression (default: true)")
	fmt.Println("\nExamples:")
	fmt.Println("  zfs-client snap              # Use configured dataset")
	fmt.Println("  zfs-client snap tank/data   # Backup specific dataset")
	fmt.Println("  zfs-client status")
}