<?php
// admin_subscriptions.php

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

include('include/headscript.php');

// DB
$dbHandler = DBHandlerSelect::getInstance();
$pdo = $dbHandler->getConnection();

// ---- Auth check ----
if (!isset($iduserlogin)) {
    die("Access denied.");
}

// ---- Admin check (Vanguard usually uses role_id=1 for admin) ----
// Adjust role_id list if needed.
$stmt = $pdo->prepare("SELECT role_id, email FROM auth_users WHERE id = ? LIMIT 1");
$stmt->execute([$iduserlogin]);
$me = $stmt->fetch(PDO::FETCH_ASSOC);

if (!$me || !in_array((int)$me['role_id'], [1])) {
    die("Access denied: admin only.");
}

// ---- Handle POST actions ----
$success_message = null;
$error = null;

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action'])) {
    $action = $_POST['action'];

    // Update school status (local app status)
    if ($action === 'update_school_status') {
        $school_id = (int)($_POST['school_id'] ?? 0);
        $new_status = $_POST['status'] ?? 'active';
        $allowed = ['active', 'inactive', 'suspended'];

        if ($school_id <= 0 || !in_array($new_status, $allowed, true)) {
            $error = "Invalid request.";
        } else {
            $stmt = $pdo->prepare("UPDATE schools SET status = ? WHERE id = ?");
            if ($stmt->execute([$new_status, $school_id])) {
                $success_message = "School status updated.";
            } else {
                $error = "Failed updating school status.";
            }
        }
    }

    // NOTE: Stripe actions (cancel, resume, change plan) should call Stripe API.
    // Here we provide placeholders so UI is ready.
    if ($action === 'flag_cancel_at_period_end') {
        $sub_id = (int)($_POST['subscription_row_id'] ?? 0);
        $flag = (int)($_POST['flag'] ?? 0);
        $school_id = (int)($_POST['school_id'] ?? 0);

        if ($sub_id <= 0 || $school_id <= 0 || !in_array($flag, [0, 1], true)) {
            $error = "Invalid request.";
        } else {
            $stmt = $pdo->prepare("
            UPDATE school_subscriptions
            SET cancel_at_period_end = ?
            WHERE id = ? AND school_id = ?
        ");
            $ok = $stmt->execute([$flag, $sub_id, $school_id]);

            if ($ok) {
                $success_message = $flag ? "Marked cancel at period end (LOCAL)." : "Unmarked cancel at period end (LOCAL).";
            } else {
                $error = "Failed updating subscription flag.";
            }
        }
    }
}

// ---- Filters (GET) ----
$q            = trim($_GET['q'] ?? '');
$plan_id      = (int)($_GET['plan_id'] ?? 0);
$sub_status   = trim($_GET['sub_status'] ?? '');     // e.g. active, trialing, past_due, canceled, incomplete, unpaid
$school_status = trim($_GET['school_status'] ?? '');  // active, inactive, suspended
$has_sub      = $_GET['has_sub'] ?? '';              // '1' or '0' or ''

$where = [];
$params = [];

// Search by school name/email/owner email
if ($q !== '') {
    $where[] = "(s.name LIKE ? OR s.email LIKE ? OR ou.email LIKE ? OR CONCAT(ou.first_name,' ',ou.last_name) LIKE ?)";
    $like = '%' . $q . '%';
    $params[] = $like;
    $params[] = $like;
    $params[] = $like;
    $params[] = $like;
}

if ($plan_id > 0) {
    $where[] = "ss.plan_id = ?";
    $params[] = $plan_id;
}

if ($sub_status !== '') {
    $where[] = "ss.status = ?";
    $params[] = $sub_status;
}

if ($school_status !== '') {
    $where[] = "s.status = ?";
    $params[] = $school_status;
}

if ($has_sub === '1') {
    $where[] = "ss.id IS NOT NULL";
} elseif ($has_sub === '0') {
    $where[] = "ss.id IS NULL";
}

$sqlWhere = '';
if (!empty($where)) {
    $sqlWhere = "WHERE " . implode(" AND ", $where);
}

// ---- Load plans for filter dropdown ----
$stmt = $pdo->prepare("SELECT id, code, name, currency, unit_amount, `interval`, interval_count, is_active FROM billing_plans ORDER BY is_active DESC, unit_amount ASC, name ASC");
$stmt->execute();
$plans = $stmt->fetchAll(PDO::FETCH_ASSOC);

// ---- Main query: schools + subscription + owner + plan ----
$stmt = $pdo->prepare("
    SELECT
        s.id AS school_id,
        s.name AS school_name,
        s.email AS school_email,
        s.status AS school_status,
        s.created_at AS school_created_at,

        ou.id AS owner_id,
        ou.first_name AS owner_first_name,
        ou.last_name AS owner_last_name,
        ou.email AS owner_email,

        ss.id AS subscription_row_id,
        ss.stripe_customer_id,
        ss.stripe_subscription_id,
        COALESCE(ss.status, 'none') AS subscription_status,
        ss.current_period_start,
        ss.current_period_end,
        ss.trial_start,
        ss.trial_end,
        ss.cancel_at_period_end,
        ss.updated_at AS subscription_updated_at,

        bp.id AS plan_id,
        bp.code AS plan_code,
        bp.name AS plan_name,
        bp.currency,
        bp.unit_amount,
        bp.`interval`,
        bp.interval_count

    FROM schools s
    JOIN auth_users ou ON ou.id = s.owner_id
    LEFT JOIN school_subscriptions ss ON ss.school_id = s.id
    LEFT JOIN billing_plans bp ON bp.id = ss.plan_id

    $sqlWhere
    ORDER BY
    -- Put schools without subscription at the bottom
    CASE WHEN ss.id IS NULL THEN 1 ELSE 0 END ASC,

    -- Show problematic subscriptions first
    FIELD(ss.status, 'past_due','unpaid','incomplete','incomplete_expired','canceled','paused','trialing','active') ASC,

    s.created_at DESC

");
$stmt->execute($params);
$rows = $stmt->fetchAll(PDO::FETCH_ASSOC);

// ---- Helpers ----
function h($v)
{
    return htmlspecialchars((string)$v, ENT_QUOTES, 'UTF-8');
}

function moneyFmt($unit_amount, $currency)
{
    if ($unit_amount === null || $currency === null) return '—';
    $amount = ((int)$unit_amount) / 100;
    return number_format($amount, 2, ',', '.') . ' ' . strtoupper($currency);
}

function dateFmt($dt)
{
    if (!$dt) return '—';
    // Accept both timestamp and datetime strings
    $ts = is_numeric($dt) ? (int)$dt : strtotime($dt);
    if (!$ts) return '—';
    return date('d/m/Y', $ts);
}

function badgeClassForSub($status)
{
    $map = [
        'active' => 'bg-success',
        'trialing' => 'bg-info',
        'past_due' => 'bg-warning',
        'unpaid' => 'bg-danger',
        'incomplete' => 'bg-warning',
        'incomplete_expired' => 'bg-danger',
        'canceled' => 'bg-secondary',
        'paused' => 'bg-secondary',
        'none' => 'bg-secondary',
    ];
    return $map[$status] ?? 'bg-dark';
}

function badgeClassForSchool($status)
{
    $map = [
        'active' => 'bg-success',
        'inactive' => 'bg-secondary',
        'suspended' => 'bg-danger',
    ];
    return $map[$status] ?? 'bg-dark';
}

?>
<!doctype html>
<html lang="it">

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="icon" href="assets/images/favicon-32x32.png" type="image/png" />
    <?php include('cssinclude.php'); ?>
    <?php include('siteinfo.php'); ?>
</head>

<body>
    <div class="wrapper">
        <?php include('include/navbar.php'); ?>
        <?php include('include/topbar.php'); ?>

        <div class="page-wrapper">
            <div class="page-content">

                <div class="card radius-10 mb-3">
                    <div class="card-body">
                        <div class="d-flex align-items-center justify-content-between">
                            <div>
                                <h5 class="mb-0">Admin Subscriptions</h5>
                                <div class="text-muted small">Schools + Stripe subscription status overview</div>
                            </div>
                            <div class="d-flex gap-2">
                                <a href="admin_billing_plans.php" class="btn btn-outline-primary">
                                    <i class="bx bx-list-ul"></i> Billing Plans
                                </a>
                            </div>
                        </div>
                    </div>
                </div>

                <?php if ($success_message): ?>
                    <div class="alert alert-success"><?php echo h($success_message); ?></div>
                <?php endif; ?>
                <?php if ($error): ?>
                    <div class="alert alert-danger"><?php echo h($error); ?></div>
                <?php endif; ?>

                <!-- Filters -->
                <div class="card radius-10 mb-4">
                    <div class="card-body">
                        <form method="GET" class="row g-2 align-items-end">
                            <div class="col-md-4">
                                <label class="form-label">Search</label>
                                <input type="text" class="form-control" name="q" value="<?php echo h($q); ?>" placeholder="School / email / owner">
                            </div>

                            <div class="col-md-3">
                                <label class="form-label">Plan</label>
                                <select class="form-control" name="plan_id">
                                    <option value="0">All plans</option>
                                    <?php foreach ($plans as $p): ?>
                                        <option value="<?php echo (int)$p['id']; ?>" <?php echo ((int)$p['id'] === $plan_id) ? 'selected' : ''; ?>>
                                            <?php
                                            $label = $p['name'] . ' (' . $p['code'] . ') - ' . moneyFmt($p['unit_amount'], $p['currency']);
                                            $label .= ' / ' . $p['interval_count'] . ' ' . $p['interval'];
                                            if (!(int)$p['is_active']) $label .= ' [inactive]';
                                            echo h($label);
                                            ?>
                                        </option>
                                    <?php endforeach; ?>
                                </select>
                            </div>

                            <div class="col-md-2">
                                <label class="form-label">Subscription status</label>
                                <select class="form-control" name="sub_status">
                                    <option value="">All</option>
                                    <?php foreach (['none', 'active', 'trialing', 'past_due', 'unpaid', 'incomplete', 'incomplete_expired', 'canceled', 'paused'] as $st): ?>
                                        <option value="<?php echo h($st); ?>" <?php echo ($sub_status === $st) ? 'selected' : ''; ?>>
                                            <?php echo h($st); ?>
                                        </option>
                                    <?php endforeach; ?>
                                </select>
                            </div>

                            <div class="col-md-2">
                                <label class="form-label">School status</label>
                                <select class="form-control" name="school_status">
                                    <option value="">All</option>
                                    <?php foreach (['active', 'inactive', 'suspended'] as $st): ?>
                                        <option value="<?php echo h($st); ?>" <?php echo ($school_status === $st) ? 'selected' : ''; ?>>
                                            <?php echo h($st); ?>
                                        </option>
                                    <?php endforeach; ?>
                                </select>
                            </div>

                            <div class="col-md-1">
                                <label class="form-label">Has sub</label>
                                <select class="form-control" name="has_sub">
                                    <option value="" <?php echo ($has_sub === '')  ? 'selected' : ''; ?>>All</option>
                                    <option value="1" <?php echo ($has_sub === '1') ? 'selected' : ''; ?>>Yes</option>
                                    <option value="0" <?php echo ($has_sub === '0') ? 'selected' : ''; ?>>No</option>
                                </select>
                            </div>

                            <div class="col-md-12 d-flex gap-2 mt-2">
                                <button class="btn btn-primary" type="submit">
                                    <i class="bx bx-filter"></i> Apply
                                </button>
                                <a class="btn btn-outline-secondary" href="admin_subscriptions.php">Reset</a>
                            </div>
                        </form>
                    </div>
                </div>

                <!-- Results -->
                <div class="card radius-10">
                    <div class="card-body">
                        <div class="d-flex align-items-center justify-content-between mb-3">
                            <div>
                                <h6 class="mb-0">Schools</h6>
                                <div class="text-muted small"><?php echo (int)count($rows); ?> rows</div>
                            </div>
                        </div>

                        <div class="table-responsive">
                            <table class="table table-striped table-bordered align-middle mb-0">
                                <thead>
                                    <tr>
                                        <th style="min-width:260px;">School</th>
                                        <th style="min-width:220px;">Owner</th>
                                        <th style="min-width:190px;">School status</th>
                                        <th style="min-width:160px;">Subscription</th>
                                        <th style="min-width:220px;">Plan</th>
                                        <th style="min-width:200px;">Period</th>
                                        <th style="min-width:200px;">Trial</th>
                                        <th style="min-width:140px;">Cancel at period end</th>
                                        <th style="min-width:260px;">Stripe IDs</th>
                                        <th style="min-width:160px;">Updated</th>
                                        <th style="min-width:180px;">Actions</th>
                                    </tr>
                                </thead>
                                <tbody>
                                    <?php foreach ($rows as $row): ?>
                                        <?php
                                        $hasSubscription = !empty($row['subscription_row_id']);
                                        $subStatus = $row['subscription_status'] ?? 'none';
                                        ?>
                                        <tr>
                                            <td>
                                                <div class="fw-bold"><?php echo h($row['school_name']); ?></div>
                                                <div class="text-muted small">
                                                    ID: <?php echo (int)$row['school_id']; ?> · <?php echo h($row['school_email']); ?>
                                                </div>
                                                <div class="text-muted small">
                                                    Created: <?php echo h(dateFmt($row['school_created_at'])); ?>
                                                </div>
                                            </td>

                                            <td>
                                                <div class="fw-bold"><?php echo h(trim(($row['owner_first_name'] ?? '') . ' ' . ($row['owner_last_name'] ?? ''))); ?></div>
                                                <div class="text-muted small"><?php echo h($row['owner_email']); ?></div>
                                            </td>

                                            <td>
                                                <form method="POST" class="d-flex gap-2 align-items-center">
                                                    <input type="hidden" name="action" value="update_school_status">
                                                    <input type="hidden" name="school_id" value="<?php echo (int)$row['school_id']; ?>">

                                                    <select name="status" class="form-control form-control-sm" style="min-width:140px;">
                                                        <?php foreach (['active', 'inactive', 'suspended'] as $st): ?>
                                                            <option value="<?php echo h($st); ?>" <?php echo ($row['school_status'] === $st) ? 'selected' : ''; ?>>
                                                                <?php echo h($st); ?>
                                                            </option>
                                                        <?php endforeach; ?>
                                                    </select>

                                                    <button type="submit" class="btn btn-sm btn-outline-primary">
                                                        Save
                                                    </button>
                                                </form>

                                                <div class="mt-2">
                                                    <span class="badge <?php echo h(badgeClassForSchool($row['school_status'])); ?>">
                                                        <?php echo h($row['school_status']); ?>
                                                    </span>
                                                </div>
                                            </td>

                                            <td>
                                                <span class="badge <?php echo h(badgeClassForSub($subStatus)); ?>">
                                                    <?php echo h($subStatus); ?>
                                                </span>

                                                <?php if ($hasSubscription): ?>
                                                    <div class="text-muted small mt-2">
                                                        Qty: <?php echo (int)($row['quantity'] ?? 1); ?>
                                                    </div>
                                                <?php endif; ?>
                                            </td>

                                            <td>
                                                <?php if ($hasSubscription && !empty($row['plan_id'])): ?>
                                                    <div class="fw-bold"><?php echo h($row['plan_name']); ?></div>
                                                    <div class="text-muted small">
                                                        <?php echo h($row['plan_code']); ?> · <?php echo h(moneyFmt($row['unit_amount'], $row['currency'])); ?>
                                                    </div>
                                                    <div class="text-muted small">
                                                        Every <?php echo (int)$row['interval_count']; ?> <?php echo h($row['interval']); ?>
                                                    </div>
                                                <?php else: ?>
                                                    —
                                                <?php endif; ?>
                                            </td>

                                            <td>
                                                <?php if ($hasSubscription): ?>
                                                    <div class="text-muted small">
                                                        Start: <?php echo h(dateFmt($row['current_period_start'])); ?>
                                                    </div>
                                                    <div class="text-muted small">
                                                        End: <?php echo h(dateFmt($row['current_period_end'])); ?>
                                                    </div>
                                                <?php else: ?>
                                                    —
                                                <?php endif; ?>
                                            </td>

                                            <td>
                                                <?php if ($hasSubscription): ?>
                                                    <div class="text-muted small">
                                                        Start: <?php echo h(dateFmt($row['trial_start'])); ?>
                                                    </div>
                                                    <div class="text-muted small">
                                                        End: <?php echo h(dateFmt($row['trial_end'])); ?>
                                                    </div>
                                                <?php else: ?>
                                                    —
                                                <?php endif; ?>
                                            </td>

                                            <td>
                                                <?php if ($hasSubscription): ?>
                                                    <?php if ((int)$row['cancel_at_period_end'] === 1): ?>
                                                        <span class="badge bg-warning">Yes</span>
                                                    <?php else: ?>
                                                        <span class="badge bg-secondary">No</span>
                                                    <?php endif; ?>
                                                <?php else: ?>
                                                    —
                                                <?php endif; ?>
                                            </td>

                                            <td>
                                                <?php if ($hasSubscription): ?>
                                                    <div class="text-muted small">
                                                        cust: <?php echo h($row['stripe_customer_id'] ?: '—'); ?>
                                                    </div>
                                                    <div class="text-muted small">
                                                        sub: <?php echo h($row['stripe_subscription_id'] ?: '—'); ?>
                                                    </div>
                                                <?php else: ?>
                                                    —
                                                <?php endif; ?>
                                            </td>

                                            <td>
                                                <?php echo h(dateFmt($row['subscription_updated_at'])); ?>
                                            </td>

                                            <td>
                                                <?php if ($hasSubscription): ?>
                                                    <form method="POST" class="d-inline">
                                                        <input type="hidden" name="action" value="flag_cancel_at_period_end">
                                                        <input type="hidden" name="subscription_row_id" value="<?php echo (int)$row['subscription_row_id']; ?>">
                                                        <input type="hidden" name="school_id" value="<?php echo (int)$row['school_id']; ?>">
                                                        <input type="hidden" name="flag" value="<?php echo ((int)$row['cancel_at_period_end'] === 1) ? 0 : 1; ?>">

                                                        <?php if ((int)$row['cancel_at_period_end'] === 1): ?>
                                                            <button type="submit" class="btn btn-sm btn-outline-success">
                                                                Unmark
                                                            </button>
                                                        <?php else: ?>
                                                            <button type="submit" class="btn btn-sm btn-outline-warning">
                                                                Mark
                                                            </button>
                                                        <?php endif; ?>
                                                    </form>
                                                <?php else: ?>
                                                    <span class="text-muted">—</span>
                                                <?php endif; ?>
                                            </td>
                                        </tr>
                                    <?php endforeach; ?>

                                    <?php if (empty($rows)): ?>
                                        <tr>
                                            <td colspan="11" class="text-center text-muted py-4">No results</td>
                                        </tr>
                                    <?php endif; ?>
                                </tbody>
                            </table>
                        </div>

                    </div>
                </div>

            </div> <!-- /page-content -->
        </div> <!-- /page-wrapper -->

        <?php if (file_exists('include/footer.php')) include('include/footer.php'); ?>
    </div> <!-- /wrapper -->

    <?php if (file_exists('jsinclude.php')) include('jsinclude.php'); ?>
</body>

</html>