<?php

/**
 * Handle Embed Donation Form Route
 *
 * @package Give
 * @since 2.7.0
 */

namespace Give\Route;

use Give\Controller\Form as Controller;
use WP_Post;

defined('ABSPATH') || exit;

/**
 * Template class.
 *
 * @since 2.7.0
 */
class Form
{
    /**
     * Option name
     *
     * @since 2.7.0
     * @var string
     */
    private $optionName = 'form_page_url_prefix';

    /**
     * Route base
     *
     * @since 2.7.0
     * @var string
     */
    private $defaultBase = 'give';

    /**
     * Route base
     *
     * @since 2.7.0
     * @var string
     */
    private $base;

    /**
     * @since 2.8.0
     * @var Controller
     */
    private $controller;

    /**
     * Form constructor.
     *
     * @since 2.8.0
     *
     * @param Controller $controller
     */
    public function __construct(Controller $controller)
    {
        $this->controller = $controller;
    }

    /**
     * Form constructor.
     */
    public function init()
    {
        $this->setBasePrefix();
        $this->controller->init();

        add_action('init', [$this, 'addRule']);
        add_action('query_vars', [$this, 'addQueryVar']);
        add_action('give-settings_save_advanced', [$this, 'updateRule'], 11);
    }

    /**
     * Setup base prefix
     *
     * @since 2.7.0
     */
    public function setBasePrefix()
    {
        $this->base = give_get_option($this->optionName, $this->defaultBase);
    }

    /**
     * Add rewrite rule
     *
     * @since 2.7.0
     */
    public function addRule()
    {
        add_rewrite_rule(
            "{$this->base}/(.+?)/?$",
            sprintf(
                'index.php?url_prefix=%1$s&give_form_id=$matches[1]',
                $this->base
            ),
            'top'
        );
    }

    /**
     * Add query var
     *
     * @since 2.7.0
     *
     * @param array $queryVars
     *
     * @return array
     */
    public function addQueryVar($queryVars)
    {
        $queryVars[] = 'give_form_id';
        $queryVars[] = 'url_prefix';

        return $queryVars;
    }

    /**
     * Get form URL.
     *
     * @since 2.7.0
     * @since 2.8.0 Add support for all permalink settings.
     * @since 2.8.0 Specify URL scheme to avoid mixed content when loaded in the admin.
     *
     * @param int $form_id
     *
     * @return string
     */
    public function getURL($form_id)
    {
        $scheme = (is_ssl()) ? 'https' : 'http';

        return get_option('permalink_structure')
            ? home_url("/{$this->base}/{$form_id}", $scheme)
            : esc_url(add_query_arg(
                [
                    'give_form_id' => $form_id,
                    'url_prefix' => $this->base,
                ],
                home_url('', $scheme)
            ));
    }

    /**
     * Get url base.
     *
     * @since 2.7.0
     * @return string
     */
    public function getBase()
    {
        return $this->base;
    }

    /**
     * Get url base.
     *
     * @since 2.7.0
     * @return string
     */
    public function getOptionName()
    {
        return $this->optionName;
    }

    /**
     * Update route rule
     *
     * @since 2.7.0
     */
    public function updateRule()
    {
        global $wp_rewrite;

        $updateBase = give_get_option($this->optionName, $this->defaultBase);

        if ($updateBase !== $this->base) {
            $this->base = $updateBase;

            // Save rewrite rule manually.
            $this->addRule();
            flush_rewrite_rules();
            $wp_rewrite->wp_rewrite_rules();
        }
    }

    /**
     * Get queried form ID.
     *
     * @since 2.7.0
     * @return int
     */
    public function getQueriedFormID()
    {
        $formId = 0;

        if ($queryVar = get_query_var('give_form_id')) {
            $form = current(
                get_posts(
                    [
                        'name' => $queryVar,
                        'numberposts' => 1,
                        'post_type' => 'give_forms',
                    ]
                )
            );

            if ($form instanceof WP_Post) {
                $formId = $form->ID;
            }
        }

        return $formId;
    }
}