<?php

namespace Kletellier\PdoWrapper;

class Expression
{
    private string $condition;
    private string $operator;
    private mixed $value;

    public function __construct($condition, $operator, $value)
    {
        $this->condition = $condition;
        $this->operator = $operator;
        $this->value = $value;
    }

    /**
     * Return raw value of the expression
     *
     * @return string
     */
    public function raw(): string
    {
        $operator = trim(strtolower($this->operator));
        if ($operator == "in") {
            $values = implode(",", str_split(str_repeat("?", count($this->value))));
            return "(" . $this->condition . " "  . $this->operator . " (" . $values . ") )";
        }
        if ($operator == "between" && count($this->value) == 2) {
            return "(" . $this->condition . " "  . $this->operator . " ? AND ? )";
        }
        if ($operator == "notnull") {
            return "(" . $this->condition . " IS NOT NULL )";
        }
        if ($operator == "isnull") {
            return "(" . $this->condition . " IS NULL )";
        }
        return "(" . $this->condition . " "  . $this->operator . " ? )";
    }

    /**
     * Return if the condition need to evaluate data
     *
     * @return boolean
     */
    public function hasData()
    {
        $operator = trim(strtolower($this->operator));
        return (in_array($operator, ["isnull","notnull"])) ? false : true;
    }

    /**
     * Return actual condition
     *
     * @return string
     */
    public function getCondition(): string
    {
        return $this->condition;
    }

    /**
     * Set condition
     *
     * @param string $condition
     * @return self
     */
    public function setCondition(string $condition): self
    {
        $this->condition = $condition;
        return $this;
    }

    /**
     * Get actual operator
     *
     * @return string
     */
    public function getOperator(): string
    {
        return $this->operator;
    }

    /**
     * Set operator
     *
     * @param string $operator
     * @return self
     */
    public function setOperator(string $operator): self
    {
        $this->operator = $operator;
        return $this;
    }

    /**
     * Get the value of the expression
     *
     * @return mixed
     */
    public function getValue(): mixed
    {
        return $this->value;
    }

    /**
     * Set the value of the expression
     *
     * @param mixed $value
     * @return void
     */
    public function setValue(mixed $value)
    {
        $this->value = $value;
        return $this;
    }
}