<?php


namespace ColibriWP\Theme;


use ColibriWP\Theme\Core\ComponentBase;
use ColibriWP\Theme\Core\ConfigurableInterface;
use Exception;

class ActiveCallback {

    private $rules = array();
    private $component = null;


    private function getSettingValue( $setting ) {
        global $wp_customize;

        $value = "";

        if ( $wp_customize ) {
            if ( $wp_customize->get_setting( $setting ) ) {
                $value = $wp_customize->get_setting( $setting )->value();
            }
        } else {

            $default = false;
            if ( $this->component ) {
                /** @var ConfigurableInterface $component */
                $component = $this->component;
                $default   = $component::settingDefault( $setting );
            }

            $value = get_theme_mod( $setting, $default );


        }

        return ComponentBase::mabyDeserializeModValue( $value );
    }

    /**
     * @param $rule
     *
     * @return bool
     * @throws Exception
     */
    private function checkRule( $rule ) {
        $result = true;

        if ( ! is_array( $rule ) ) {
            throw new Exception( 'Invalid active callback rule' );
        }

        $rule = array_merge(
            array(
                "setting"  => "",
                "operator" => "=",
                "value"    => true,
            ),
            $rule
        );

        if ( empty( $rule['setting'] ) ) {
            return true;
        }

        $value         = $rule['value'];
        $setting_value = $this->getSettingValue( $rule['setting'] );

        switch ( $rule['operator'] ) {
            case "=":
            case "==":
                $result = ( $setting_value == $value );
                break;

            case "!=":
                $result = ( $setting_value != $value );
                break;

            case "===":
                $result = ( $setting_value === $value );
                break;

            case "!==":
                $result = ( $setting_value !== $value );
                break;
            /* greater */
            case ">":
                $result = ( $setting_value > $value );
                break;
            case ">=":
                $result = ( $setting_value >= $value );
                break;
            /* lower than */
            case "<":
                $result = ( $setting_value < $value );
                break;
            case "<=":
                $result = ( $setting_value <= $value );
                break;

            case "in":

                if ( is_array( $setting_value ) ) {
                    $result = in_array( $value, $setting_value );
                } else {
                    if ( is_array( $value ) ) {
                        $result = in_array( $setting_value, $value );
                    } else {
                        $result = false;
                    }
                }

                break;

        }

        return $result;
    }


    /**
     * @return bool
     * @throws Exception
     */
    public function applyRules() {
        $result = true;

        foreach ( (array) $this->rules as $rule ) {
            try {
                if ( ! $this->checkRule( $rule ) ) {
                    $result = false;
                    break;
                }
            } catch ( Exception $e ) {
                throw $e;
            }
        }

        return $result;
    }

    /**
     * @param array $rules
     *
     * @return ActiveCallback
     */
    public function setRules( $rules ) {
        $this->rules = $rules;

        return $this;
    }

    /**
     * @param ConfigurableInterface $component
     *
     * @return ActiveCallback
     */
    public function setComponent( $component ) {
        $this->component = $component;

        return $this;
    }

}