package cli

import (
	"fmt"
	"os"

	"github.com/spf13/cobra"
)

func NewConfigCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "config",
		Short: "Manage CLI configuration",
		Long:  "View and modify CLI configuration settings",
	}

	cmd.AddCommand(newConfigShowCmd())
	cmd.AddCommand(newConfigSetCmd())
	cmd.AddCommand(newConfigResetCmd())

	return cmd
}

func newConfigShowCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "show",
		Short: "Show current configuration",
		RunE: func(cmd *cobra.Command, args []string) error {
			config, err := LoadConfig()
			if err != nil {
				return fmt.Errorf("failed to load config: %w", err)
			}

			configPath, _ := GetConfigPath()

			fmt.Printf("Configuration:\n")
			fmt.Printf("  Config file: %s\n", configPath)
			fmt.Printf("  Server URL: %s\n", config.ServerURL)
			fmt.Printf("  Account Number: %s\n", getConfigValue(config.AccountNumber, "Not set"))
			fmt.Printf("  Access Token: %s\n", getConfigValue(config.AccessToken, "Not set"))

			if config.IsAuthenticated() {
				fmt.Printf("  Status: Authenticated\n")
			} else {
				fmt.Printf("  Status: Not authenticated\n")
			}

			return nil
		},
	}
}

func newConfigSetCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "set <key> <value>",
		Short: "Set a configuration value",
		Long: `Set a configuration value. Available keys:
  server-url    - TermCloud server URL (e.g., https://api.termcloud.com)`,
		Args: cobra.ExactArgs(2),
		RunE: func(cmd *cobra.Command, args []string) error {
			key := args[0]
			value := args[1]

			config, err := LoadConfig()
			if err != nil {
				return fmt.Errorf("failed to load config: %w", err)
			}

			switch key {
			case "server-url":
				config.ServerURL = value
				fmt.Printf("Server URL set to: %s\n", value)
			default:
				return fmt.Errorf("unknown config key: %s", key)
			}

			if err := config.Save(); err != nil {
				return fmt.Errorf("failed to save config: %w", err)
			}

			return nil
		},
	}
}

func newConfigResetCmd() *cobra.Command {
	var force bool

	cmd := &cobra.Command{
		Use:   "reset",
		Short: "Reset configuration to defaults",
		RunE: func(cmd *cobra.Command, args []string) error {
			if !force {
				fmt.Printf("This will delete all configuration including login credentials.\n")
				fmt.Printf("Are you sure? (y/N): ")
				var response string
				fmt.Scanln(&response)
				if response != "y" && response != "yes" && response != "Y" && response != "YES" {
					fmt.Printf("Cancelled.\n")
					return nil
				}
			}

			configPath, err := GetConfigPath()
			if err != nil {
				return fmt.Errorf("failed to get config path: %w", err)
			}

			if err := os.Remove(configPath); err != nil && !os.IsNotExist(err) {
				return fmt.Errorf("failed to remove config file: %w", err)
			}

			fmt.Printf("Configuration reset successfully.\n")
			fmt.Printf("You'll need to log in again with 'tcman account login' or create a new account.\n")

			return nil
		},
	}

	cmd.Flags().BoolVar(&force, "force", false, "Force reset without confirmation")
	return cmd
}

func getConfigValue(value, defaultValue string) string {
	if value == "" {
		return defaultValue
	}
	if len(value) > 20 {
		return value[:17] + "..."
	}
	return value
}