package commandkit

import (
	"fmt"

	internalcobra "gitea.maximumdirect.net/eric/CommandKit/internal/cobra"
)

// App owns one command registry and its application identity.
type App struct {
	identity         Identity
	commands         map[string]*commandNode
	commandTree      *internalcobra.Command
	configRegistered bool
}

type commandNode struct {
	command  Command
	reserved bool
}

// New creates an application with the supplied identity and initial commands.
// The identity name must not be empty. The root help and version names are
// reserved for generated commands.
func New(identity Identity, commands ...Command) (*App, error) {
	if identity.Name == "" {
		return nil, fmt.Errorf("application identity name must not be empty")
	}

	app := &App{
		identity: identity,
		commands: map[string]*commandNode{
			"help": {
				command:  Command{record: &commandRecord{name: "help", summary: "Show help for commands."}},
				reserved: true,
			},
			"version": {
				command:  Command{record: &commandRecord{name: "version", summary: "Show application version."}},
				reserved: true,
			},
		},
	}
	if err := app.installBuiltins(); err != nil {
		return nil, err
	}
	if err := app.Register(commands...); err != nil {
		return nil, err
	}
	return app, nil
}