package util

import (
	"context"

	"github.com/dop251/goja"
	"github.com/pkg/errors"
)

func AssertType[T any](v goja.Value, rt *goja.Runtime) T {
	if c, ok := v.Export().(T); ok {
		return c
	}

	panic(rt.ToValue(errors.Errorf("expected value to be a '%T', got '%T'", new(T), v.Export())))
}

func AssertContext(v goja.Value, r *goja.Runtime) context.Context {
	return AssertType[context.Context](v, r)
}

func AssertObject(v goja.Value, r *goja.Runtime) map[string]any {
	return AssertType[map[string]any](v, r)
}

func AssertString(v goja.Value, r *goja.Runtime) string {
	return AssertType[string](v, r)
}