<?php
ob_start();
require_once __DIR__ . '/../../includes/auth.php';
require_once __DIR__ . '/../../includes/square.php';
ob_end_clean();
header('Content-Type: application/json');

if (!isLoggedIn() || empty($_SESSION['is_admin'])) {
    echo json_encode(['success'=>false,'error'=>'Forbidden']); exit;
}

$adminId = (int)$_SESSION['user_id'];
$method  = $_SERVER['REQUEST_METHOD'];
$action  = $_GET['action'] ?? 'list_settings';

// ── GET actions ──────────────────────────────────────────
if ($method === 'GET') {
    if ($action === 'list_settings') {
        $rows = db()->query("SELECT * FROM admin_payout_settings ORDER BY sort_order ASC, id ASC")->fetchAll();
        echo json_encode(['success'=>true, 'settings'=>$rows]);
        exit;
    }
    if ($action === 'cashout_detail') {
        $id = (int)($_GET['id'] ?? 0);
        $stmt = db()->prepare("
            SELECT cr.*, u.username, u.alias AS user_alias, u.email,
                   pm.method_type AS saved_payout_type, pm.account_handle AS saved_payout_handle, pm.label AS saved_payout_label
            FROM cashout_requests cr
            JOIN users u ON cr.user_id = u.id
            LEFT JOIN payout_methods pm ON pm.user_id = cr.user_id AND pm.is_default = 1
            WHERE cr.id = ?
        ");
        $stmt->execute([$id]);
        $row = $stmt->fetch();
        echo json_encode(['success'=>true, 'cashout'=>$row]);
        exit;
    }
    echo json_encode(['success'=>false,'error'=>'Unknown action']); exit;
}

if ($method !== 'POST') { echo json_encode(['success'=>false,'error'=>'Method not allowed']); exit; }
$d = json_decode(file_get_contents('php://input'), true);

// ── Update payout settings ────────────────────────────────
if ($action === 'update_setting') {
    $id      = (int)($d['id'] ?? 0);
    $handle  = substr(trim($d['handle']??''), 0, 200);
    $instr   = substr(trim($d['instructions']??''), 0, 500);
    $enabled = (int)(bool)($d['is_enabled']??1);
    $label   = substr(trim($d['label']??''), 0, 100);
    $sort    = (int)($d['sort_order']??0);
    db()->prepare("UPDATE admin_payout_settings SET label=?,handle=?,instructions=?,is_enabled=?,sort_order=? WHERE id=?")
       ->execute([$label,$handle,$instr,$enabled,$sort,$id]);
    echo json_encode(['success'=>true]); exit;
}

// ── Process cashout payout ────────────────────────────────
if ($action === 'process_payout') {
    $cashoutId     = (int)($d['cashout_id'] ?? 0);
    $payoutKey     = trim($d['payout_method_key'] ?? '');
    $payoutType    = trim($d['payout_type'] ?? 'manual'); // 'manual' or 'square_gift_card'
    $note          = substr(trim($d['note'] ?? ''), 0, 500);

    // Load cashout
    $stmt = db()->prepare("SELECT cr.*, u.username, u.alias, u.email FROM cashout_requests cr JOIN users u ON cr.user_id=u.id WHERE cr.id=? AND cr.status IN ('pending','locked')");
    $stmt->execute([$cashoutId]);
    $cashout = $stmt->fetch();
    if (!$cashout) { echo json_encode(['success'=>false,'error'=>'Cashout not found or already processed']); exit; }

    // Amount in cents (1 token = $1)
    $amountCents = (int)round($cashout['tokens'] * 100);

    // Load payout setting
    $pset = db()->prepare("SELECT * FROM admin_payout_settings WHERE method_key=? AND is_enabled=1");
    $pset->execute([$payoutKey]);
    $setting = $pset->fetch();

    $squareTxnId   = null;
    $giftCardGan   = null;
    $giftCardBal   = null;
    $txnStatus     = 'completed';

    if ($payoutType === 'square_gift_card') {
        // ── Square Gift Card Flow ─────────────────────────
        try {
            // 1. Create gift card
            $gcRes = SquareClient::post('/v2/gift-cards', [
                'idempotency_key' => 'gc-create-' . $cashoutId . '-' . time(),
                'location_id'     => SQUARE_LOCATION_ID,
                'gift_card'       => ['type' => 'DIGITAL'],
            ]);

            if (empty($gcRes['gift_card']['id'])) {
                throw new Exception('Failed to create gift card: ' . json_encode($gcRes));
            }

            $gcId  = $gcRes['gift_card']['id'];
            $gcGan = $gcRes['gift_card']['gan'] ?? '';

            // 2. Activate gift card with balance
            $actRes = SquareClient::post('/v2/gift-card-activities', [
                'idempotency_key'     => 'gc-activate-' . $cashoutId . '-' . time(),
                'gift_card_activity'  => [
                    'type'            => 'ACTIVATE',
                    'location_id'     => SQUARE_LOCATION_ID,
                    'gift_card_id'    => $gcId,
                    'activate_activity_details' => [
                        'amount_money' => [
                            'amount'   => $amountCents,
                            'currency' => 'USD',
                        ],
                    ],
                ],
            ]);

            if (empty($actRes['gift_card_activity']['id'])) {
                throw new Exception('Failed to activate gift card: ' . json_encode($actRes));
            }

            $giftCardGan = $gcGan;
            $giftCardBal = $amountCents;
            $squareTxnId = $actRes['gift_card_activity']['id'];

        } catch (Exception $e) {
            echo json_encode(['success'=>false,'error'=>'Square error: ' . $e->getMessage()]); exit;
        }
    }

    // ── Mark cashout as sent ──────────────────────────────
    db()->beginTransaction();
    try {
        db()->prepare("UPDATE cashout_requests SET status='sent', admin_note=?, resolved_at=NOW() WHERE id=?")
           ->execute([$note, $cashoutId]);

        db()->prepare("INSERT INTO cashout_transactions (cashout_id,admin_id,payout_method,payout_type,amount_cents,square_txn_id,gift_card_gan,gift_card_balance,note,status)
            VALUES (?,?,?,?,?,?,?,?,?,'completed')")
           ->execute([$cashoutId, $adminId, $payoutKey, $payoutType, $amountCents, $squareTxnId, $giftCardGan, $giftCardBal, $note]);

        db()->commit();
    } catch (Exception $e) {
        db()->rollBack();
        echo json_encode(['success'=>false,'error'=>'DB error: '.$e->getMessage()]); exit;
    }

    $response = ['success'=>true, 'status'=>'sent', 'amount_cents'=>$amountCents];
    if ($giftCardGan) {
        $response['gift_card_gan']     = $giftCardGan;
        $response['gift_card_balance'] = $giftCardBal;
    }
    echo json_encode($response); exit;
}

echo json_encode(['success'=>false,'error'=>'Unknown action']);