<?php

declare(strict_types=1);

namespace FatBottom\Services;

use FatBottom\Core\Database;

final class StatsService
{
    public function __construct(private readonly Database $db)
    {
    }

    public function record(string $route, ?int $userId): void
    {
        if (str_starts_with($route, '/assets/')) {
            return;
        }
        $ip = $_SERVER['REMOTE_ADDR'] ?? '';
        $this->db->execute(
            'INSERT INTO visitor_events (session_id, user_id, route, referrer, user_agent, ip_hash)
             VALUES (?, ?, ?, ?, ?, ?)',
            [
                session_id(),
                $userId,
                substr($route, 0, 255),
                substr((string) ($_SERVER['HTTP_REFERER'] ?? ''), 0, 500),
                substr((string) ($_SERVER['HTTP_USER_AGENT'] ?? ''), 0, 500),
                hash('sha256', $ip . date('Y-m-d')),
            ]
        );
    }

    public function dashboard(): array
    {
        if (!$this->db->isSqlite()) {
            return [
                'today_orders' => (int) $this->db->fetch(
                    'SELECT COUNT(*) AS value FROM orders WHERE DATE(placed_at) = CURRENT_DATE'
                )['value'],
                'today_sales' => (int) $this->db->fetch(
                    "SELECT COALESCE(SUM(o.total_cents), 0) - COALESCE(SUM(r.refunded_cents), 0) AS value
                     FROM orders o
                     LEFT JOIN (
                         SELECT order_id, SUM(amount_cents) AS refunded_cents FROM refunds GROUP BY order_id
                     ) r ON r.order_id = o.id
                     WHERE o.payment_status IN ('paid', 'partially_refunded', 'refunded')
                     AND DATE(o.placed_at) = CURRENT_DATE"
                )['value'],
                'open_orders' => (int) $this->db->fetch(
                    "SELECT COUNT(*) AS value FROM orders WHERE status IN ('paid', 'preparing', 'ready')"
                )['value'],
                'abandoned_carts' => (int) $this->db->fetch(
                    "SELECT COUNT(*) AS value FROM carts
                     WHERE status = 'active' AND subtotal_cents > 0
                     AND last_seen_at < DATE_SUB(NOW(), INTERVAL 30 MINUTE)"
                )['value'],
                'today_visitors' => (int) $this->db->fetch(
                    'SELECT COUNT(DISTINCT session_id) AS value FROM visitor_events
                     WHERE DATE(created_at) = CURRENT_DATE'
                )['value'],
                'newsletter_members' => (int) $this->db->fetch(
                    'SELECT COUNT(*) AS value FROM users WHERE newsletter_opt_in = 1 AND active = 1'
                )['value'],
            ];
        }

        return [
            'today_orders' => (int) $this->db->fetch(
                "SELECT COUNT(*) AS value FROM orders
                 WHERE date(placed_at, 'localtime') = date('now', 'localtime')"
            )['value'],
            'today_sales' => (int) $this->db->fetch(
                "SELECT COALESCE(SUM(o.total_cents), 0) - COALESCE(SUM(r.refunded_cents), 0) AS value
                 FROM orders o
                 LEFT JOIN (
                     SELECT order_id, SUM(amount_cents) AS refunded_cents FROM refunds GROUP BY order_id
                 ) r ON r.order_id = o.id
                 WHERE o.payment_status IN ('paid', 'partially_refunded', 'refunded')
                 AND date(o.placed_at, 'localtime') = date('now', 'localtime')"
            )['value'],
            'open_orders' => (int) $this->db->fetch(
                "SELECT COUNT(*) AS value FROM orders WHERE status IN ('paid', 'preparing', 'ready')"
            )['value'],
            'abandoned_carts' => (int) $this->db->fetch(
                "SELECT COUNT(*) AS value FROM carts
                 WHERE status = 'active' AND subtotal_cents > 0
                 AND last_seen_at < datetime('now', '-30 minutes')"
            )['value'],
            'today_visitors' => (int) $this->db->fetch(
                "SELECT COUNT(DISTINCT session_id) AS value FROM visitor_events
                 WHERE date(created_at, 'localtime') = date('now', 'localtime')"
            )['value'],
            'newsletter_members' => (int) $this->db->fetch(
                'SELECT COUNT(*) AS value FROM users WHERE newsletter_opt_in = 1 AND active = 1'
            )['value'],
        ];
    }
}