package object

import "fmt"

type Integer struct {
	Value int64
}

func (i Integer) Bool() bool {
	return i.Value != 0
}

func (i Integer) Type() Type {
	return IntegerType
}

func (i Integer) Inspect() string {
	return fmt.Sprintf("%d", i.Value)
}

func (i Integer) Clone() Object {
	return Integer{Value: i.Value}
}

func (i Integer) String() string {
	return i.Inspect()
}

func (i Integer) Add(other Object) (Object, error) {
	if !AssertTypes(other, IntegerType) {
		return nil, NewBinaryOpError(i, other, "+")
	}
	return Integer{i.Value + other.(Integer).Value}, nil
}

func (i Integer) Sub(other Object) (Object, error) {
	if !AssertTypes(other, IntegerType) {
		return nil, NewBinaryOpError(i, other, "-")
	}
	return Integer{i.Value - other.(Integer).Value}, nil
}

func (i Integer) Mul(other Object) (Object, error) {
	switch other.Type() {
	case IntegerType:
		return Integer{i.Value * other.(Integer).Value}, nil
	case StringType:
		return other.(Mul).Mul(i)
	case ArrayType:
		return other.(Mul).Mul(i)
	default:
		return nil, NewBinaryOpError(i, other, "*")
	}
}

func (i Integer) Div(other Object) (Object, error) {
	if !AssertTypes(other, IntegerType) {
		return nil, NewBinaryOpError(i, other, "/")
	}
	return Integer{i.Value / other.(Integer).Value}, nil
}

func (i Integer) Mod(other Object) (Object, error) {
	if !AssertTypes(other, IntegerType) {
		return nil, NewBinaryOpError(i, other, "%")
	}
	return Integer{i.Value % other.(Integer).Value}, nil
}

func (i Integer) BitwiseOr(other Object) (Object, error) {
	if !AssertTypes(other, IntegerType) {
		return nil, NewBinaryOpError(i, other, "|")
	}
	return Integer{i.Value | other.(Integer).Value}, nil
}

func (i Integer) BitwiseXor(other Object) (Object, error) {
	if !AssertTypes(other, IntegerType) {
		return nil, NewBinaryOpError(i, other, "^")
	}
	return Integer{i.Value ^ other.(Integer).Value}, nil
}

func (i Integer) BitwiseAnd(other Object) (Object, error) {
	if !AssertTypes(other, IntegerType) {
		return nil, NewBinaryOpError(i, other, "")
	}
	return Integer{i.Value & other.(Integer).Value}, nil
}

func (i Integer) BitwiseNot() Object {
	return Integer{^i.Value}
}

func (i Integer) LeftShift(other Object) (Object, error) {
	if !AssertTypes(other, IntegerType) {
		return nil, NewBinaryOpError(i, other, "<<")
	}
	return Integer{i.Value << other.(Integer).Value}, nil
}

func (i Integer) RightShift(other Object) (Object, error) {
	if !AssertTypes(other, IntegerType) {
		return nil, NewBinaryOpError(i, other, ">>")
	}
	return Integer{i.Value >> other.(Integer).Value}, nil
}

func (i Integer) LogicalNot() Object {
	return Boolean{!i.Bool()}
}

func (i Integer) Negate() Object {
	return Integer{-i.Value}
}

func (i Integer) Compare(other Object) int {
	if obj, ok := other.(Integer); ok {
		switch {
		case i.Value < obj.Value:
			return -1
		case i.Value > obj.Value:
			return 1
		default:
			return 0
		}
	}
	return -1
}