<?php
namespace DatabaseHelper;

use DatabaseHelper\enums\Operator;

trait Conditionable
{
    protected array $conditions = [];
    protected Schema $schema;

    public function where(string $col, string|Operator $operator, mixed $val): self {
        return $this->addCondition($col, $operator, $val, "AND");
    }

    public function andWhere(string $col, string|Operator $operator, mixed $val): self {
        return $this->addCondition($col, $operator, $val, "AND");
    }

    public function orWhere(string $col, string|Operator $operator, mixed $val): self {
        return $this->addCondition($col, $operator, $val, "OR");
    }

    protected function addCondition(string $col, string|Operator $operator, mixed $val, string $prefix): self {
        $this->schema->requireColumn($col);

        // Convert the operator string to a ConditionOperator enum if needed.
        if (is_string($operator))
            $operator = Operator::fromString($operator);

        $columnType = $this->schema->columnType($col);
        $castedValue = $columnType->dbCast($val);

        if (!empty($this->conditions))
            $this->conditions[] = $prefix;
        $this->conditions[] = "$col " . $operator->toString() . " $castedValue";

        return $this;
    }

    public function isConditioned(): bool {
        return !empty($this->conditions);
    }

    protected function combineConditions(): string {
        if ($this->isConditioned())
            return implode(" ", $this->conditions);
        return "";
    }
}