<?php

namespace BrizyPlaceholders;

/**
 * @internal
 *
 * Class ContentPlaceholder
 */
final class ContentPlaceholder
{
    /**
     * @var string
     */
    protected $uid;

    /**
     * @var string
     */
    protected $placeholder;

    /**
     * @var string
     */
    protected $name;

    /**
     * @var []
     */
    protected $attributes;

    /**
     * @var string
     */
    protected $content;

    /**
     * @param $name
     * @param $placeholder
     * @param null $attributes
     * @param null $content
     */
    public function __construct($name, $placeholder, $attributes = null, $content = null)
    {
        $this->setUid(md5(microtime() . mt_rand(0, PHP_INT_MAX) . $placeholder));
        $this->setPlaceholder($placeholder);
        $this->setName($name);
        $this->setAttributes($attributes);
        $this->setContent($content);
    }

    /**
     * @return null
     * @throws \Exception
     */
    public function getId($required = false)
    {
        return $this->getAttribute('id', $required);
    }

    public function getEntityId($required = false)
    {
        return $this->getId($required);
    }

    public function getEntityType($required = false)
    {
        return $this->getAttribute('typeId', $required);
    }

    /**
     * @return string
     */
    public function getUid()
    {
        return $this->uid;
    }

    /**
     * @param $uid
     *
     * @return $this
     */
    public function setUid($uid)
    {
        $this->uid = $uid;

        return $this;
    }

    /**
     * @return string
     */
    public function getPlaceholder()
    {
        return $this->placeholder;
    }

    /**
     * @param $placeholder
     *
     * @return $this
     */
    public function setPlaceholder($placeholder)
    {
        $this->placeholder = $placeholder;

        return $this;
    }

    /**
     * @return string
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * @param $name
     *
     * @return $this
     */
    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

    /**
     * @return mixed
     */
    public function getAttributes()
    {
        return $this->attributes;
    }

    /**
     * @param $attributes
     *
     * @return $this
     */
    public function setAttributes($attributes)
    {
        $this->attributes = $attributes;

        return $this;
    }

    /**
     * @param $name
     *
     * @return null
     */
    public function getAttribute($name, $thowIfNotFound = false)
    {
        if (isset($this->attributes[$name])) {
            return $this->attributes[$name];
        }

        if ($thowIfNotFound) {
            throw new \Exception("The is not attribute '{$name}' set.");
        }

        return null;
    }

    /**
     * @return string
     */
    public function getContent()
    {
        return $this->content;
    }

    /**
     * @param $content
     *
     * @return $this
     */
    public function setContent($content)
    {
        $this->content = $content;

        return $this;
    }

    /**.
     * @return string
     */
    public function buildPlaceholder()
    {
        $placeholderName = $this->getName();

        $attrs = $this->buildAttributeString();

        if (strlen($attrs)!==0)
            $attrs = " " . $attrs;

        $placeholder = "{{" . $placeholderName . $attrs . "}}";

        if ($content = trim($this->getContent())) {
            $placeholder = "{$placeholder}$content" . '{{end_' . $placeholderName . '}}';
        }

        return $placeholder;
    }

    protected function buildAttributeString()
    {
        return implode(" ",
            array_map(function ($key, $val) {
                return "{$key}=\"{$val}\"";
            },
                array_keys($this->getAttributes()),
                array_values($this->getAttributes())
            )
        );
    }

}
