<?php
namespace DatabaseHelper\enums;

use InvalidArgumentException;

enum Operator
{
    case EQUAL;
    case NOT_EQUAL;
    case GREATER;
    case GREATER_EQUAL;
    case LESS;
    case LESS_EQUAL;

    public static function fromString(string $operator): self {
        return match ($operator) {
            '='   => self::EQUAL,
            '!='  => self::NOT_EQUAL,
            '>'   => self::GREATER,
            '>='  => self::GREATER_EQUAL,
            '<'   => self::LESS,
            '<='  => self::LESS_EQUAL,
            default => throw new InvalidArgumentException("Invalid operator: $operator"),
        };
    }

    public function toString(): string {
        return match ($this) {
            self::EQUAL         => '=',
            self::NOT_EQUAL     => '!=',
            self::GREATER       => '>',
            self::GREATER_EQUAL => '>=',
            self::LESS          => '<',
            self::LESS_EQUAL    => '<=',
        };
    }
}