package cli

import (
	"fmt"
	"sort"

	"github.com/spf13/cobra"

	"github.com/kotoyuuko/cc-switch-cli/internal/config"
	"github.com/kotoyuuko/cc-switch-cli/internal/mask"
)

func newListCmd(app *appState) *cobra.Command {
	var verbose bool
	cmd := &cobra.Command{
		Use:     "list",
		Aliases: []string{"ls"},
		Short:   "List configured providers",
		RunE: func(cmd *cobra.Command, args []string) error {
			return runList(app, verbose)
		},
	}
	cmd.Flags().BoolVarP(&verbose, "verbose", "V", false,
		"also print env keys with masked values (references shown as-is)")
	return cmd
}

func runList(app *appState, verbose bool) error {
	if len(app.cfg.Providers) == 0 {
		fmt.Fprintln(app.stdout, "(no providers configured)")
		return nil
	}
	names := app.cfg.SortedProviderNames()
	for _, name := range names {
		p := app.cfg.Providers[name]
		marker := " "
		if app.cfg.DefaultProvider == name {
			marker = "*"
		}
		line := fmt.Sprintf("%s %s", marker, name)
		if p.Description != "" {
			line += "  " + p.Description
		}
		fmt.Fprintln(app.stdout, line)

		if verbose {
			keys := make([]string, 0, len(p.Env))
			for k := range p.Env {
				keys = append(keys, k)
			}
			sort.Strings(keys)
			for _, k := range keys {
				fmt.Fprintf(app.stdout, "    %s=%s\n", k, displayValue(p.Env[k]))
			}
		}
	}
	return nil
}

// displayValue returns the string to show the user for an env value.
// `env:VAR` references are shown as-is (they are pointers, not secrets);
// literal values are masked.
func displayValue(v string) string {
	if _, ok := config.IsEnvRef(v); ok {
		return v
	}
	return mask.Value(v)
}