<?php

defined( 'ABSPATH' ) || exit;

/**
 * Whether the Vizyt Pro add-on is active. The core never checks licences:
 * Vizyt Pro answers through the `vizyt_is_pro` filter (with its own licence
 * rule). A Vizyt Pro older than 1.6.0 does not hook the filter and counts
 * as active, as before (LegacyProNotice asks to update it).
 *
 * Free features never depend on the answer: it only hides the upsell
 * links and the opt-in credit line. Add-ons extend Vizyt through its
 * generic hooks (vizyt_booking_block_layouts, vizyt_replace_appearance_page,
 * vizyt_booking_drawer_sections, the widget's layout registry).
 */
function vizyt_is_pro(): bool {
    return (bool) apply_filters( 'vizyt_is_pro', \Vizyt\Admin\LegacyProNotice::legacy_pro_loaded() );
}

function vizyt_db_prefix(): string {
    global $wpdb;
    return $wpdb->prefix . 'vizyt_';
}

/**
 * Currencies a service can be priced in (ISO 4217).
 *
 * @return string[]
 */
function vizyt_currencies(): array {
    $currencies = apply_filters( 'vizyt_currencies', [ 'UAH', 'USD', 'EUR', 'CHF', 'GBP', 'PLN', 'CZK' ] );

    return array_values( array_unique( array_filter( array_map( 'strtoupper', (array) $currencies ), function ( $c ) {
        return (bool) preg_match( '/^[A-Z]{3}$/', $c );
    } ) ) );
}

/**
 * Translate a user-entered string (service, category, staff, custom field…)
 * through Polylang / WPML. Returns $value unchanged without a multilingual
 * plugin or translation.
 *
 * @param string      $value Original (default-language) text.
 * @param string      $name  Stable string name, e.g. "service_12_name".
 * @param string|null $lang  Language slug; current language when null.
 */
function vizyt_translate( string $value, string $name, ?string $lang = null ): string {
    return \Vizyt\Integrations\Multilingual::translate( $value, $name, $lang );
}

/**
 * Register a user-entered string for translation (Polylang strings /
 * WPML String Translation, group "Vizyt").
 */
function vizyt_register_string( string $name, string $value, bool $multiline = false ): void {
    \Vizyt\Integrations\Multilingual::register( $name, $value, $multiline );
}

/**
 * Public data of an active service, translated to the current language.
 * Handy in themes (e.g. with the ACF "Vizyt service" field).
 *
 * @return array{id:int,name:string,description:string,duration:int,price:float,currency:string,category_id:int,shortcode:string}|null
 */
function vizyt_get_service( int $id ): ?array {
    foreach ( \Vizyt\Models\Service::getPublicList() as $row ) {
        if ( (int) $row->id === $id ) {
            $row = \Vizyt\Integrations\Multilingual::translate_service( $row );

            return [
                'id'          => (int) $row->id,
                'name'        => (string) $row->name,
                'description' => (string) $row->description,
                'duration'    => (int) $row->duration,
                'price'       => (float) $row->price,
                'currency'    => (string) $row->currency,
                'category_id' => (int) $row->category_id,
                'shortcode'   => '[vizyt_booking service_id="' . (int) $row->id . '"]',
            ];
        }
    }

    return null;
}

/**
 * Active services for themes, translated to the current language.
 *
 * @param array{category?: int|string} $args category: ID or slug.
 * @return array<int, array{id:int,name:string,description:string,duration:int,price:float,currency:string,image_url:string,category_id:int,category_name:string,shortcode:string}>
 */
function vizyt_get_services( array $args = [] ): array {
    global $wpdb;

    $category_id = null;
    if ( isset( $args['category'] ) && '' !== $args['category'] ) {
        $category_id = is_numeric( $args['category'] )
            ? (int) $args['category']
            : (int) $wpdb->get_var( $wpdb->prepare( "SELECT id FROM {$wpdb->prefix}vizyt_categories WHERE slug = %s", (string) $args['category'] ) ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- Vizyt's own categories table, read fresh.
        if ( ! $category_id ) {
            return [];
        }
    }

    $out = [];
    foreach ( \Vizyt\Integrations\Multilingual::translate_services( \Vizyt\Models\Service::getPublicList( $category_id ) ) as $row ) {
        $out[] = [
            'id'            => (int) $row->id,
            'name'          => (string) $row->name,
            'description'   => (string) $row->description,
            'duration'      => (int) $row->duration,
            'price'         => (float) $row->price,
            'currency'      => (string) $row->currency,
            'image_url'     => (string) $row->image_url,
            'category_id'   => (int) $row->category_id,
            'category_name' => (string) $row->category_name,
            'shortcode'     => '[vizyt_booking service_id="' . (int) $row->id . '"]',
        ];
    }

    return $out;
}

/**
 * Active staff for themes (team sections), translated to the current language.
 *
 * @return array<int, array{id:int,name:string,job_title:string,description:string,avatar_url:string}>
 */
function vizyt_get_staff(): array {
    global $wpdb;

    $rows = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}vizyt_staff WHERE status = 'active' ORDER BY sort_order ASC, id ASC" ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- Vizyt's own staff table, read fresh.
    $out  = [];

    foreach ( (array) $rows as $row ) {
        $out[] = [
            'id'          => (int) $row->id,
            'name'        => vizyt_translate( (string) $row->name, 'staff_' . $row->id . '_name' ),
            'job_title'   => vizyt_translate( (string) ( $row->job_title ?? '' ), 'staff_' . $row->id . '_job_title' ),
            'description' => vizyt_translate( (string) $row->description, 'staff_' . $row->id . '_description' ),
            'avatar_url'  => (string) $row->avatar_url,
        ];
    }

    return $out;
}

/**
 * Price formatted for the current locale ("CHF 150.–" style is the
 * theme's business; this gives "CHF 150" / "150 CHF" via Intl when present).
 */
function vizyt_format_price( float $price, string $currency ): string {
    if ( class_exists( 'NumberFormatter' ) ) {
        $fmt = new \NumberFormatter( determine_locale(), \NumberFormatter::CURRENCY );
        $fmt->setAttribute( \NumberFormatter::FRACTION_DIGITS, floor( $price ) == $price ? 0 : 2 ); // phpcs:ignore Universal.Operators.StrictComparisons -- float compared with its floor: whole prices show no decimals.
        $out = $fmt->formatCurrency( $price, $currency );
        if ( false !== $out ) {
            return $out;
        }
    }

    return $currency . ' ' . number_format_i18n( $price, floor( $price ) == $price ? 0 : 2 ); // phpcs:ignore Universal.Operators.StrictComparisons -- float compared with its floor: whole prices show no decimals.
}

/**
 * The business timezone (Vizyt → Settings → Timezone, else the WordPress
 * timezone). Booking start/end times are stored as wall-clock time in this
 * zone, so every "now" comparison and conversion must use it — not UTC.
 */
function vizyt_timezone(): \DateTimeZone {
    $name = \Vizyt\Admin\Settings::get_timezone();

    // WordPress manual offsets ("UTC+3", "UTC-9.5") are not PHP identifiers.
    if ( preg_match( '/^UTC([+-])(\d+)(?:\.(5|75))?$/', $name, $m ) ) {
        $minutes = isset( $m[3] ) ? (int) round( (float) ( '0.' . $m[3] ) * 60 ) : 0;
        $name    = sprintf( '%s%02d:%02d', $m[1], (int) $m[2], $minutes );
    }

    try {
        return new \DateTimeZone( $name );
    } catch ( \Exception $e ) {
        return wp_timezone();
    }
}

/**
 * Where "What's in Pro" links point (filterable for agencies).
 */
function vizyt_pro_url(): string {
    return (string) apply_filters( 'vizyt_pro_url', 'https://tolokastudio.com/vizyt/' );
}

/**
 * Where "Upgrade to Pro" leads (later the checkout, through Freemius);
 * the Pro information page until something filters it.
 */
function vizyt_pro_upgrade_url(): string {
    return (string) apply_filters( 'vizyt_pro_upgrade_url', vizyt_pro_url() );
}

/**
 * Price of the Pro add-on card, e.g. "€49". Empty — and no price line — unless
 * a filter (later: Freemius) provides one: the price is never hard-coded.
 */
function vizyt_pro_price(): string {
    return trim( (string) apply_filters( 'vizyt_pro_price', '' ) );
}

/**
 * Plugin documentation (admin footer).
 */
function vizyt_docs_url(): string {
    return 'https://tolokastudio.com/vizyt/docs/';
}

/**
 * Support forum on wordpress.org (admin footer).
 */
function vizyt_support_url(): string {
    return 'https://wordpress.org/support/plugin/vizyt/';
}

/**
 * The customer's "Manage booking" page for a booking token
 * (home_url('/?vizyt_booking=…')). $view 'cancel' opens the cancel
 * confirmation, 'reschedule' the new-time picker. The token cancels and
 * moves the booking: never put this URL in a calendar file or a public event.
 */
function vizyt_manage_url( string $token, string $view = '' ): string {
    $args = [ 'vizyt_booking' => $token ];
    if ( in_array( $view, [ 'cancel', 'reschedule' ], true ) ) {
        $args['vizyt_view'] = $view;
    }

    return add_query_arg( $args, home_url( '/' ) );
}