<?php

if (!defined('ABSPATH')) {
    exit;
}

add_action('admin_init', 'rayachat_register_sync_setting');
add_action('admin_enqueue_scripts', 'rayachat_enqueue_sync_script');
add_action('wp_ajax_rayachat_full_sync', 'rayachat_ajax_full_sync');
add_action('admin_init', 'rayachat_keep_daily_sync');

function rayachat_register_sync_setting()
{
    register_setting('rayachat', RAYACHAT_SYNC_OPTION, array(
        'type'              => 'array',
        'sanitize_callback' => 'rayachat_sync_sanitize',
    ));
}

// Deactivating the plugin unschedules its jobs. Turned back on, it would still
// send changes but never run the daily check again, and after three quiet days
// Rayachat stops quoting the store's prices. Looked at once an hour, which is
// nothing against three days, instead of on every admin page. The time of the
// last look is an autoloaded option, so the pages in between read nothing (a
// transient would cost the queries it saves); deactivating deletes it. AJAX
// (the editor's heartbeat among it) skips the lookup.
function rayachat_keep_daily_sync()
{
    if (wp_doing_ajax() || (int) get_option('rayachat_daily_checked') > time() - HOUR_IN_SECONDS) {
        return;
    }
    update_option('rayachat_daily_checked', time(), true);
    if (rayachat_sync_active()) {
        rayachat_schedule_daily_sync();
    }
}

/**
 * The form posts only `token` and `forget`, and nothing else it posts is read.
 * This runs inside update_option, so it returns what to save and writes nothing
 * itself.
 */
function rayachat_sync_sanitize($input)
{
    if ($input !== null && $input === rayachat_sync_cleaned()) {
        return $input;
    }

    return rayachat_sync_cleaned(rayachat_sync_clean(rayachat_sync_from_form($input)));
}

/**
 * Saving the form checks the key with Rayachat before keeping it. An empty key
 * field keeps the saved key, which the form never prints back.
 */
function rayachat_sync_from_form($input)
{
    $current = rayachat_sync_settings();
    if (!is_array($input)) {
        return $current;
    }
    if (!empty($input['forget'])) {
        return array_merge($current, rayachat_sync_forget(true));
    }

    $typed = isset($input['token']) && is_string($input['token']) ? trim($input['token']) : '';
    $token = $typed !== '' ? $typed : $current['token'];
    if ($token === '') {
        return $current;
    }
    if (!rayachat_sync_key_valid($token)) {
        add_settings_error(RAYACHAT_SYNC_OPTION, 'rayachat-sync-key', __('That is not a Rayachat sync key. Create one in the Rayachat dashboard: your chatbot’s Publish page → WordPress plugin → WooCommerce sync.', 'raya-ai'));
        return $current;
    }
    if ($token === $current['token'] && $current['error'] === '') {
        return $current;
    }

    $adopted = rayachat_sync_adopt($token);
    if (is_wp_error($adopted)) {
        add_settings_error(RAYACHAT_SYNC_OPTION, 'rayachat-sync-' . $adopted->get_error_code(), $adopted->get_error_message());
        return $current;
    }
    if (empty($adopted['stats']['currencySupported'])) {
        add_settings_error(
            RAYACHAT_SYNC_OPTION,
            'rayachat-sync-currency',
            /* translators: %s: the store's currency code. */
            sprintf(__('Your store’s currency (%s) can’t be converted to toman, so products are synced without prices.', 'raya-ai'), get_woocommerce_currency()),
            'warning'
        );
    }

    return array_merge($current, $adopted);
}

/**
 * Checks a sync key with Rayachat and starts syncing with it: everything once
 * now, in the background, then once a day. Returns the settings to save, or a
 * WP_Error whose message says why not.
 */
function rayachat_sync_adopt($token)
{
    $result = rayachat_sync_connect($token);
    if (is_wp_error($result)) {
        return new WP_Error('offline', sprintf(
            /* translators: %s: the network error. */
            __('Could not reach Rayachat, so the sync settings were not changed: %s', 'raya-ai'),
            $result->get_error_message()
        ));
    }
    if ($result['code'] === 401) {
        return new WP_Error('key', __('Rayachat did not accept this sync key. It may have been replaced by a newer one; copy the current key from the Rayachat dashboard.', 'raya-ai'));
    }
    if ($result['code'] !== 200 || !is_array($result['body'])) {
        return new WP_Error('failed', __('Rayachat could not save the sync settings. Please try again in a minute.', 'raya-ai'));
    }

    if (function_exists('as_enqueue_async_action')) {
        as_enqueue_async_action('rayachat_full_sync', array('products', 1), RAYACHAT_SYNC_GROUP);
    }
    rayachat_schedule_daily_sync();

    return array(
        'token' => $token,
        'agent' => isset($result['body']['agentName']) ? (string) $result['body']['agentName'] : '',
        'error' => '',
        'held'  => 0,
        'stats' => rayachat_sync_stats($result['body']),
    );
}

/**
 * Stops syncing. With `$tell_rayachat`, the key is revoked there too, so the
 * chatbot stops quoting this store's prices now rather than after three quiet
 * days. Returns the settings to save.
 */
function rayachat_sync_forget($tell_rayachat)
{
    $token = rayachat_sync_settings()['token'];
    if ($tell_rayachat && $token !== '') {
        // With the token passed in, a 401 here changes nothing locally.
        rayachat_sync_request('disconnect', array(), $token);
    }
    rayachat_unschedule_sync();
    $reset = array('token' => '', 'agent' => '', 'error' => '', 'held' => 0, 'stats' => array());
    if (!doing_filter('sanitize_option_' . RAYACHAT_SYNC_OPTION)) {
        rayachat_sync_update($reset);
    }

    return $reset;
}

function rayachat_enqueue_sync_script($hook)
{
    if ($hook !== RAYACHAT_PAGE_HOOK || !rayachat_sync_active()) {
        return;
    }
    wp_enqueue_script('rayachat-sync', plugins_url('assets/sync.js', RAYACHAT_FILE), array(), RAYACHAT_VERSION, true);
    wp_localize_script('rayachat-sync', 'rayachatSync', array(
        'ajaxUrl' => admin_url('admin-ajax.php'),
        'nonce'   => wp_create_nonce('rayachat_full_sync'),
        /* translators: 1: products sent so far, 2: products in the store. */
        'products' => __('Products: %1$s of %2$s sent…', 'raya-ai'),
        'cleanup'  => __('Removing products the store no longer shows…', 'raya-ai'),
        /* translators: 1: new products, 2: updated products, 3: products already up to date, 4: removed products. */
        'done'     => __('Done: %1$s new, %2$s updated, %3$s already up to date, %4$s removed.', 'raya-ai'),
        /* translators: %s: number of products. */
        'limit'    => __('%s products did not fit your Rayachat plan’s product limit.', 'raya-ai'),
        /* translators: %s: number of products. */
        'queued'   => __('%s more are being sent in the background.', 'raya-ai'),
        /* translators: %s: number of products. */
        'retrying' => __('%s products did not get through; they will be sent again automatically.', 'raya-ai'),
        /* translators: %s: number of products. */
        'invalid'  => __('Rayachat could not accept %s products; check their name and prices.', 'raya-ai'),
        'held'     => rayachat_held_message(),
        'failed'   => __('The sync stopped. Check your connection and try again.', 'raya-ai'),
    ));
}

function rayachat_ajax_full_sync()
{
    check_ajax_referer('rayachat_full_sync');
    if (!current_user_can('manage_options')) {
        wp_send_json_error(null, 403);
    }
    if (!rayachat_sync_active()) {
        wp_send_json_error(null, 409);
    }
    $phase = isset($_POST['phase']) ? sanitize_key(wp_unslash($_POST['phase'])) : 'products';
    $page = isset($_POST['page']) ? absint(wp_unslash($_POST['page'])) : 1;
    if (!in_array($phase, array('products', 'reconcile'), true)) {
        $phase = 'products';
    }
    wp_send_json_success(rayachat_full_sync_step($phase, $page));
}

// One wording for the progress line and the notice; %s is the number of products.
function rayachat_held_message()
{
    /* translators: %s: number of products. */
    return __('%s products are no longer in your store, but that is half your synced products or more, so Rayachat kept them to be safe. If you really removed them, confirm in the Rayachat dashboard: your chatbot’s Publish page → WordPress plugin.', 'raya-ai');
}


function rayachat_sync_date($timestamp)
{
    return rayachat_digits(wp_date(get_option('date_format') . ' ' . get_option('time_format'), (int) $timestamp));
}

function rayachat_number($number)
{
    return rayachat_digits(number_format_i18n((int) $number));
}

function rayachat_render_sync_card()
{
    $sync = rayachat_sync_settings();
    $stats = is_array($sync['stats']) ? $sync['stats'] : array();
    $published = (int) wp_count_posts('product')->publish;

    if ($sync['token'] === '') {
        $tone = 'neutral';
        $label = __('Not set up', 'raya-ai');
        $line = __('Not syncing yet. Turn it on with “Connect to Rayachat”, and the chatbot will know your products, prices and stock.', 'raya-ai');
    } elseif ($sync['error'] !== '') {
        $tone = 'error';
        $label = __('Key rejected', 'raya-ai');
        $line = __('Rayachat stopped accepting this site’s sync key, so nothing is being synced. Click “Connect to Rayachat” to set it up again.', 'raya-ai');
    } else {
        $tone = 'success';
        $label = __('Syncing', 'raya-ai');
        /* translators: %s: the chatbot's name. */
        $line = sprintf(__('Products go to the chatbot “%s” and are kept up to date as they change.', 'raya-ai'), $sync['agent']);
    }
    $next = rayachat_sync_active() && function_exists('as_next_scheduled_action')
        ? as_next_scheduled_action('rayachat_daily_sync')
        : false;
    $counts = rayachat_sync_active() && $stats;
    ?>
    <section class="rc-card">
        <div class="rc-card__head">
            <h2><?php esc_html_e('WooCommerce products', 'raya-ai'); ?></h2>
            <?php rayachat_badge($tone, $label); ?>
        </div>
        <p class="rc-card__text"><?php echo esc_html($line); ?></p>
        <?php if (rayachat_sync_active() && (int) $sync['held'] > 0) : ?>
            <p class="rc-alert"><?php echo esc_html(sprintf(rayachat_held_message(), rayachat_number($sync['held']))); ?></p>
        <?php endif; ?>
        <div class="rc-stats">
            <div class="rc-stat">
                <span class="rc-stat__value"><?php echo esc_html(rayachat_number($published)); ?></span>
                <span class="rc-stat__label"><?php esc_html_e('Published in your store', 'raya-ai'); ?></span>
            </div>
            <?php if ($counts) : ?>
                <div class="rc-stat">
                    <span class="rc-stat__value"><?php echo esc_html(rayachat_number($stats['products'])); ?></span>
                    <span class="rc-stat__label"><?php esc_html_e('Known to the chatbot', 'raya-ai'); ?></span>
                </div>
                <?php if ($stats['max'] > 0) : ?>
                    <div class="rc-stat">
                        <span class="rc-stat__value">
                            <?php
                            /* translators: 1: products used, 2: the plan's limit. */
                            echo esc_html(sprintf(__('%1$s of %2$s', 'raya-ai'), rayachat_number($stats['used']), rayachat_number($stats['max'])));
                            ?>
                        </span>
                        <span class="rc-stat__label"><?php esc_html_e('Products in your Rayachat plan', 'raya-ai'); ?></span>
                        <span class="rc-meter" aria-hidden="true"><span style="width: <?php echo esc_attr((string) min(100, round(100 * $stats['used'] / $stats['max']))); ?>%"></span></span>
                    </div>
                <?php endif; ?>
            <?php endif; ?>
        </div>
        <dl class="rc-facts">
            <div>
                <dt><?php esc_html_e('Store currency', 'raya-ai'); ?></dt>
                <dd>
                    <?php
                    echo esc_html(get_woocommerce_currency());
                    if ($stats && empty($stats['currencySupported'])) {
                        echo ' · ' . esc_html__('sent without prices', 'raya-ai');
                    }
                    ?>
                </dd>
            </div>
            <?php if (rayachat_sync_active()) : ?>
                <div>
                    <dt><?php esc_html_e('Last full sync', 'raya-ai'); ?></dt>
                    <dd><?php echo esc_html($sync['last_full_sync'] ? rayachat_sync_date($sync['last_full_sync']) : __('Running for the first time', 'raya-ai')); ?></dd>
                </div>
                <div>
                    <dt><?php esc_html_e('Changes waiting to be sent', 'raya-ai'); ?></dt>
                    <dd><a href="#rayachat-sync-queue"><?php echo esc_html(rayachat_number(rayachat_sync_queue()['products'])); ?></a></dd>
                </div>
                <?php if (is_int($next)) : ?>
                    <div>
                        <dt><?php esc_html_e('Next daily check', 'raya-ai'); ?></dt>
                        <dd><?php echo esc_html(rayachat_sync_date($next)); ?></dd>
                    </div>
                <?php endif; ?>
            <?php endif; ?>
        </dl>
    </section>
    <?php
}

function rayachat_render_sync_section($settings)
{
    $field = RAYACHAT_OPTION;
    ?>
    <section class="rc-card rc-settings" id="rayachat-sync">
        <div class="rc-settings__head">
            <h2><?php esc_html_e('WooCommerce sync', 'raya-ai'); ?></h2>
            <?php if (!rayachat_sync_active()) : ?>
                <p class="rc-card__text"><?php esc_html_e('Let the chatbot know your products, prices and stock: click “Connect to Rayachat” and keep “Sync WooCommerce products” ticked on the approval page.', 'raya-ai'); ?></p>
                <p><a class="button" href="<?php echo esc_url(rayachat_connect_url()); ?>"><?php esc_html_e('Turn on product sync', 'raya-ai'); ?></a></p>
            <?php endif; ?>
        </div>
        <?php if (rayachat_sync_active()) : ?>
            <div class="rc-row">
                <div class="rc-row__label" id="rayachat-delay-label"><?php esc_html_e('Send changes', 'raya-ai'); ?></div>
                <div class="rc-row__control">
                    <?php rayachat_segmented($field, 'delay', rayachat_delay_choices(), rayachat_sync_delay(), 'rayachat-delay-label'); ?>
                    <p class="rc-hint"><?php esc_html_e('A changed product waits this long before it reaches the chatbot, and every new change you make to it starts the wait again, up to twice this long in all; a sale does not. A wrong price or a product trashed by mistake that you put right inside the wait never reaches your customers; one changed back to how it was changes nothing.', 'raya-ai'); ?></p>
                </div>
            </div>
            <div class="rc-row">
                <div class="rc-row__label"><?php esc_html_e('Full sync', 'raya-ai'); ?></div>
                <div class="rc-row__control">
                    <button type="button" class="button" id="rayachat-sync-all"><?php esc_html_e('Sync everything now', 'raya-ai'); ?></button>
                    <span id="rayachat-sync-progress" class="rc-sync-progress" role="status"></span>
                    <p class="rc-hint"><?php esc_html_e('Everything is also checked once a day, and only products that changed are sent again. Use this after changing many products at once, or after restoring a backup. Products with a change still waiting are left to their own timer.', 'raya-ai'); ?></p>
                </div>
            </div>
            <div class="rc-row">
                <div class="rc-row__label"><?php esc_html_e('Send queue', 'raya-ai'); ?></div>
                <div class="rc-row__control">
                    <?php rayachat_render_sync_queue(); ?>
                    <p class="rc-hint"><?php esc_html_e('Each job waits here for its time and then goes by itself; nothing here needs you. A product you put right before its time is sent as it is then.', 'raya-ai'); ?></p>
                </div>
            </div>
        <?php endif; ?>
        <p class="rc-settings__foot"><?php esc_html_e('Only published products are sent; hidden and password-protected ones are left out, and a main picture only as JPEG, PNG or WebP. Nothing about your orders or customers is sent.', 'raya-ai'); ?></p>
    </section>
    <?php
}

// The sync key, typed by hand: the fallback when the one-click connection
// can't be used. Rows for the manual-connection table.
function rayachat_render_sync_key_rows()
{
    $sync = rayachat_sync_settings();
    $field = RAYACHAT_SYNC_OPTION;
    ?>
    <tr>
        <th scope="row"><label for="rayachat-sync-key"><?php esc_html_e('Sync key', 'raya-ai'); ?></label></th>
        <td>
            <input
                type="password"
                id="rayachat-sync-key"
                class="regular-text code"
                dir="ltr"
                autocomplete="off"
                name="<?php echo esc_attr($field); ?>[token]"
                value=""
                placeholder="<?php echo esc_attr($sync['token'] !== '' ? __('A key is saved. Paste a new one to replace it.', 'raya-ai') : 'rwc_…'); ?>"
            >
            <p class="description"><?php esc_html_e('In the Rayachat dashboard: your chatbot’s Publish page → WordPress plugin → WooCommerce sync.', 'raya-ai'); ?></p>
            <?php if ($sync['token'] !== '') : ?>
                <p>
                    <label>
                        <input type="checkbox" name="<?php echo esc_attr($field); ?>[forget]" value="1">
                        <?php esc_html_e('Remove the key and stop syncing', 'raya-ai'); ?>
                    </label>
                </p>
            <?php endif; ?>
        </td>
    </tr>
    <?php
}