package cmd

import (
    "fmt"
    "os"

    "github.com/spf13/cobra"
    "github.com/spf13/viper"
)

var (
    cfgFile string
    verbose bool
    output  string
)

// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
    Use:   "{{.CLIName}}",
    Short: "{{.ShortDescription}}",
    Long: `{{.LongDescription}}

This is a production-grade CLI application built with Cobra.
It provides a complete command-line interface with proper error
handling, configuration management, and extensibility.`,
    Version: "{{.Version}}",
}

// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() error {
    return rootCmd.Execute()
}

func init() {
    cobra.OnInitialize(initConfig)

    // Global flags
    rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.{{.CLIName}}.yaml)")
    rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose output")
    rootCmd.PersistentFlags().StringVarP(&output, "output", "o", "text", "output format (text|json|yaml)")

    // Bind flags to viper
    viper.BindPFlag("verbose", rootCmd.PersistentFlags().Lookup("verbose"))
    viper.BindPFlag("output", rootCmd.PersistentFlags().Lookup("output"))

    // Command groups for organized help
    rootCmd.AddGroup(&cobra.Group{
        ID:    "basic",
        Title: "Basic Commands:",
    })
    rootCmd.AddGroup(&cobra.Group{
        ID:    "management",
        Title: "Management Commands:",
    })
    rootCmd.AddGroup(&cobra.Group{
        ID:    "other",
        Title: "Other Commands:",
    })
}

// initConfig reads in config file and ENV variables if set.
func initConfig() {
    if cfgFile != "" {
        // Use config file from the flag.
        viper.SetConfigFile(cfgFile)
    } else {
        // Find home directory.
        home, err := os.UserHomeDir()
        cobra.CheckErr(err)

        // Search config in home directory with name ".{{.CLIName}}" (without extension).
        viper.AddConfigPath(home)
        viper.AddConfigPath(".")
        viper.SetConfigType("yaml")
        viper.SetConfigName(".{{.CLIName}}")
    }

    viper.AutomaticEnv() // read in environment variables that match

    // If a config file is found, read it in.
    if err := viper.ReadInConfig(); err == nil && verbose {
        fmt.Fprintln(os.Stderr, "Using config file:", viper.ConfigFileUsed())
    }
}

// GetVerbose returns whether verbose mode is enabled
func GetVerbose() bool {
    return viper.GetBool("verbose")
}

// GetOutput returns the output format
func GetOutput() string {
    return viper.GetString("output")
}