<?php
/**
 * Announcements helper functions
 */

require_once __DIR__ . '/db.php';

function get_active_announcements(): array {
    $pdo = get_db();
    $today = date('Y-m-d');

    $sql = "
        SELECT * FROM announcements 
        WHERE is_active = 1
          AND (start_date IS NULL OR start_date = '' OR start_date <= :today1)
          AND (end_date IS NULL OR end_date = '' OR end_date >= :today2)
        ORDER BY id DESC
    ";

    $stmt = $pdo->prepare($sql);
    $stmt->execute([
        ':today1' => $today,
        ':today2' => $today
    ]);
    return $stmt->fetchAll() ?: [];
}

function get_active_announcement(): ?array {
    $all = get_active_announcements();
    return !empty($all) ? $all[0] : null;
}

function get_all_announcements(): array {
    $pdo = get_db();
    $stmt = $pdo->query("SELECT * FROM announcements ORDER BY id DESC");
    return $stmt->fetchAll() ?: [];
}

function get_announcement_by_id(int $id): ?array {
    $pdo = get_db();
    $stmt = $pdo->prepare("SELECT * FROM announcements WHERE id = ?");
    $stmt->execute([$id]);
    $item = $stmt->fetch();
    return $item ?: null;
}

function delete_announcement(int $id): bool {
    $pdo = get_db();
    $stmt = $pdo->prepare("DELETE FROM announcements WHERE id = ?");
    return $stmt->execute([$id]);
}

function toggle_announcement_active(int $id): bool {
    $pdo = get_db();
    $stmt = $pdo->prepare("UPDATE announcements SET is_active = CASE WHEN is_active = 1 THEN 0 ELSE 1 END, updated_at = CURRENT_TIMESTAMP WHERE id = ?");
    return $stmt->execute([$id]);
}

function save_announcement(array $data, ?int $id = null): int {
    $pdo = get_db();

    $isActive = !empty($data['is_active']) ? 1 : 0;
    $type = in_array($data['type'] ?? '', ['holiday', 'special', 'closure']) ? $data['type'] : 'holiday';
    $headline = trim($data['headline'] ?? '');
    $message = trim($data['message'] ?? '');
    $startDate = !empty($data['start_date']) ? trim($data['start_date']) : null;
    $endDate = !empty($data['end_date']) ? trim($data['end_date']) : null;
    $showBanner = !empty($data['show_banner']) ? 1 : 0;
    $showInHours = !empty($data['show_in_hours']) ? 1 : 0;

    if ($id && $id > 0) {
        $stmt = $pdo->prepare("
            UPDATE announcements SET
                is_active = ?,
                type = ?,
                headline = ?,
                message = ?,
                start_date = ?,
                end_date = ?,
                show_banner = ?,
                show_in_hours = ?,
                updated_at = CURRENT_TIMESTAMP
            WHERE id = ?
        ");
        $stmt->execute([
            $isActive, $type, $headline, $message, $startDate, $endDate,
            $showBanner, $showInHours, $id
        ]);
        return $id;
    } else {
        $stmt = $pdo->prepare("
            INSERT INTO announcements (
                is_active, type, headline, message, start_date, end_date, show_banner, show_in_hours
            ) VALUES (?, ?, ?, ?, ?, ?, ?, ?)
        ");
        $stmt->execute([
            $isActive, $type, $headline, $message, $startDate, $endDate,
            $showBanner, $showInHours
        ]);
        return (int)$pdo->lastInsertId();
    }
}