package monkey

import (
	"io"
	"monkey/internal/context"
	"monkey/internal/vm"
	"os"
)

// Options represents the options for running a script with Monkey.
type Options struct {
	Debug bool // Whether to enable debug mode or not
	Trace bool // Whether to enable trace mode or not

	Args   []string  // The arguments passed to the script
	Stdin  io.Reader // The input reader for the script
	Stdout io.Writer // The output writer for the script
	Stderr io.Writer // The error writer for the script
	Exit   func(int) // A function to call when the script exits
}

func (opts Options) ToVMOptions() []vm.Option {
	if opts.Stdin == nil {
		opts.Stdin = os.Stdin
	}
	if opts.Stdout == nil {
		opts.Stdout = os.Stdout
	}
	if opts.Stderr == nil {
		opts.Stderr = os.Stderr
	}
	if opts.Exit == nil {
		opts.Exit = os.Exit
	}

	ctx := context.New(
		context.WithArgs(opts.Args),
		context.WithStdin(opts.Stdin),
		context.WithStdout(opts.Stdout),
		context.WithStderr(opts.Stderr),
		context.WithExit(opts.Exit),
	)

	return []vm.Option{
		vm.WithDebug(opts.Debug),
		vm.WithTrace(opts.Trace),
		vm.WithContext(ctx),
	}
}