// صفحه مدیریت حقوق هر ماه
add_action('admin_menu', function () {
    add_submenu_page('gf-accounting', '📅 حقوق ماهانه', '📅 حقوق ماهانه', 'manage_options', 'gf-monthly-payroll', 'gf_monthly_payroll_page');
});

function gf_monthly_payroll_page() {
    global $wpdb;
    $user_tbl = $wpdb->prefix . 'users';
    $profile_tbl = $wpdb->prefix . 'gf_employee_profiles';
    $edu_tbl = $wpdb->prefix . 'gf_education_levels';
    $pay_tbl = $wpdb->prefix . 'gf_payrolls';

    $year = $_POST['year'] ?? date('Y');
    $month = $_POST['month'] ?? date('n');

    // مدیریت ارسال
    if (isset($_POST['calculate_payroll']) && isset($_POST['user_id'])) {
        $uid = intval($_POST['user_id']);
        $extra_hours = floatval($_POST['extra_hours']);
        $quality_percent = floatval($_POST['quality_percent']);
        $student_bonus = floatval($_POST['student_bonus']);
        $manager_percent = floatval($_POST['manager_percent']);
        $work_hours = floatval($_POST['work_hours']);

        $p = $wpdb->get_row("SELECT * FROM $profile_tbl WHERE user_id = $uid");
        if (!$p) {
            echo '<div class="notice notice-error"><p>⚠️ پروفایل یافت نشد.</p></div>';
            return;
        }

        $edu = $wpdb->get_row("SELECT * FROM $edu_tbl WHERE id = " . intval($p->education_level_id));
        $edu_percent = $edu ? floatval($edu->percentage) : 0;
        $exp_percent = floatval($wpdb->get_var("SELECT percent FROM {$wpdb->prefix}gf_experience_levels WHERE years = " . intval($p->experience_years))) ?: 0;

        $base = floatval($p->base_salary);
        $education_bonus = $base * $edu_percent / 100;
        $experience_bonus = $base * $exp_percent / 100;
        $base_pay = $base + $education_bonus + $experience_bonus;
        $hourly = $base_pay / ($p->assigned_hours ?: 160);

        $quality_bonus = $base * $quality_percent / 100;
        $extra_bonus = $extra_hours * $hourly;
        $manager_bonus = $base * $manager_percent / 100;
        $work_pay = $hourly * $work_hours;

        $total = $work_pay + $student_bonus + $quality_bonus + $extra_bonus + $manager_bonus;

        // ذخیره
        $wpdb->insert($pay_tbl, [
            'user_id' => $uid,
            'year' => $year,
            'month' => $month,
            'base_salary' => $base,
            'education_bonus' => $education_bonus,
            'experience_bonus' => $experience_bonus,
            'base_pay' => $base_pay,
            'hourly_wage' => $hourly,
            'work_hours' => $work_hours,
            'student_bonus' => $student_bonus,
            'quality_percent' => $quality_percent,
            'quality_bonus' => $quality_bonus,
            'extra_hours' => $extra_hours,
            'extra_bonus' => $extra_bonus,
            'manager_percent' => $manager_percent,
            'manager_bonus' => $manager_bonus,
            'total_pay' => $total,
        ]);

        echo '<div class="notice notice-success"><p>✅ حقوق ماهانه ثبت شد.</p></div>';
    }

    $users = get_users(['role__not_in' => ['Administrator']]);

    echo '<div class="wrap"><h1>📅 محاسبه حقوق ماهانه</h1>';
    echo '<form method="post"><table class="form-table">';
    echo "<tr><th>سال:</th><td><input name='year' value='" . esc_attr($year) . "'></td></tr>";
    echo "<tr><th>ماه:</th><td><input name='month' value='" . esc_attr($month) . "'></td></tr>";
    echo '<tr><th>کارمند:</th><td><select name="user_id">';
    foreach ($users as $u) {
        echo "<option value='{$u->ID}'>{$u->display_name}</option>";
    }
    echo '</select></td></tr>';
    echo '<tr><th>ساعات کار واقعی:</th><td><input name="work_hours" type="number" step="0.1" required></td></tr>';
    echo '<tr><th>تعداد دانش‌آموز مازاد (تومان):</th><td><input name="student_bonus" type="number" step="1000" value="0"></td></tr>';
    echo '<tr><th>درصد کیفیت و کارایی:</th><td><input name="quality_percent" type="number" step="0.1" value="0"></td></tr>';
    echo '<tr><th>اضافه‌کار کمی (ساعت):</th><td><input name="extra_hours" type="number" step="0.1" value="0"></td></tr>';
    echo '<tr><th>درصد رضایت مدیر:</th><td><input name="manager_percent" type="number" step="0.1" value="0"></td></tr>';
    echo '</table><p><input type="submit" class="button button-primary" name="calculate_payroll" value="محاسبه و ذخیره"></p></form>';
    echo '</div>';
}