package main

import (
	"log/slog"
	"os"
	"strings"

	"github.com/spf13/cobra"
)

var (
	// Global flags
	jsonLog  bool
	logLevel string
)

// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
	Use:   "ots",
	Short: "OpenTimestamps CLI tool",
	Long: `A command-line interface for OpenTimestamps operations.
It allows creating, verifying and upgrading timestamps for files.`,
	PersistentPreRun: setupLogging,
}

func init() {
	// Global flags for all commands
	rootCmd.PersistentFlags().BoolVar(&jsonLog, "json", false, "Use JSON format for logging")
	rootCmd.PersistentFlags().StringVar(&logLevel, "log-level", "info", "Log level: debug, info, warn, error")

	// Add subcommands
	rootCmd.AddCommand(createCmd)
	rootCmd.AddCommand(verifyCmd)
	rootCmd.AddCommand(upgradeCmd)
	rootCmd.AddCommand(infoCmd)
	rootCmd.AddCommand(pdfCmd)
}

// setupLogging configures the global logger based on the flags
func setupLogging(cmd *cobra.Command, args []string) {
	loggerOptions := slog.HandlerOptions{}

	switch strings.ToLower(logLevel) {
	case "debug":
		loggerOptions.Level = slog.LevelDebug
	case "info":
		loggerOptions.Level = slog.LevelInfo
	case "warn":
		loggerOptions.Level = slog.LevelWarn
	case "error":
		loggerOptions.Level = slog.LevelError
	default:
		loggerOptions.Level = slog.LevelInfo
	}

	var logHandler slog.Handler
	if jsonLog {
		logHandler = slog.NewJSONHandler(os.Stdout, &loggerOptions)
	} else {
		logHandler = slog.NewTextHandler(os.Stdout, &loggerOptions)
	}

	logger := slog.New(logHandler)
	slog.SetDefault(logger)
}