package cli

import (
	"fmt"
	"sort"

	"github.com/spf13/cobra"
)

func newConfigCmd(app *appState) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "config",
		Short: "Inspect or modify global config fields",
	}
	cmd.AddCommand(
		newConfigShowCmd(app),
		newConfigSetCmd(app),
		newConfigGetCmd(app),
	)
	return cmd
}

func newConfigShowCmd(app *appState) *cobra.Command {
	return &cobra.Command{
		Use:   "show",
		Short: "Print the current config (env values masked)",
		RunE: func(cmd *cobra.Command, args []string) error {
			fmt.Fprintf(app.stdout, "# %s\n", app.configPath)
			// Build a display copy: mask or mark each env value.
			type provView struct {
				desc string
				env  map[string]string
			}
			disp := map[string]provView{}
			for n, p := range app.cfg.Providers {
				ev := make(map[string]string, len(p.Env))
				for k, v := range p.Env {
					ev[k] = displayValue(v)
				}
				disp[n] = provView{desc: p.Description, env: ev}
			}

			if app.cfg.ClaudePath != "" {
				fmt.Fprintf(app.stdout, "claude_path: %s\n", app.cfg.ClaudePath)
			}
			if app.cfg.DefaultProvider != "" {
				fmt.Fprintf(app.stdout, "default_provider: %s\n", app.cfg.DefaultProvider)
			}
			if len(disp) == 0 {
				fmt.Fprintln(app.stdout, "providers: {}")
				return nil
			}
			fmt.Fprintln(app.stdout, "providers:")
			names := make([]string, 0, len(disp))
			for n := range disp {
				names = append(names, n)
			}
			sort.Strings(names)
			for _, n := range names {
				v := disp[n]
				fmt.Fprintf(app.stdout, "  %s:\n", n)
				if v.desc != "" {
					fmt.Fprintf(app.stdout, "    description: %s\n", v.desc)
				}
				fmt.Fprintln(app.stdout, "    env:")
				keys := make([]string, 0, len(v.env))
				for k := range v.env {
					keys = append(keys, k)
				}
				sort.Strings(keys)
				for _, k := range keys {
					fmt.Fprintf(app.stdout, "      %s: %s\n", k, v.env[k])
				}
			}
			return nil
		},
	}
}

func newConfigSetCmd(app *appState) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "set <key> <value>",
		Short: "Set a top-level config field (claude-path | default)",
		Args:  cobra.ExactArgs(2),
		RunE: func(cmd *cobra.Command, args []string) error {
			key, value := args[0], args[1]
			switch key {
			case "claude-path":
				if err := app.cfg.SetClaudePath(value); err != nil {
					return err
				}
			case "default":
				if err := app.cfg.SetDefault(value); err != nil {
					return err
				}
			default:
				return fmt.Errorf("unknown config key %q (allowed: claude-path, default)", key)
			}
			if err := app.save(); err != nil {
				return err
			}
			fmt.Fprintf(app.stdout, "set %s\n", key)
			return nil
		},
	}
	return cmd
}

func newConfigGetCmd(app *appState) *cobra.Command {
	return &cobra.Command{
		Use:   "get <key>",
		Short: "Print a top-level config field (claude-path | default)",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			switch args[0] {
			case "claude-path":
				fmt.Fprintln(app.stdout, app.cfg.ClaudePath)
			case "default":
				fmt.Fprintln(app.stdout, app.cfg.DefaultProvider)
			default:
				return fmt.Errorf("unknown config key %q (allowed: claude-path, default)", args[0])
			}
			return nil
		},
	}
}