package interpreter

// environment represents the environment in which the interpreter operates.
type environment struct {
	values map[string]any
}

// newEnvironment creates a new environment.
func newEnvironment() *environment {
	return &environment{values: make(map[string]any)}
}

// define defines a new variable in the environment.
func (e *environment) define(name string, value any) {
	e.values[name] = value
}

// get gets the value of a variable in the environment.
func (e *environment) get(name string) any {
	value, ok := e.values[name]
	if !ok {
		panic("Undefined variable '" + name + "'.")
	}

	return value
}

// assign assigns a new value to a variable in the environment.
func (e *environment) assign(name string, value any) {
	_, ok := e.values[name]
	if !ok {
		panic("Undefined variable '" + name + "'.")
	}

	e.values[name] = value
}