<?php
header('Content-Type: application/json');
require __DIR__ . "/../../config/connect.php"; // koneksi PDO
require __DIR__ . "/../paydisini/api_control.php"; // CreateTransaction,statusTransaction, deleteTransaction

$action = $_POST['action'] ?? '';

switch ($action) {
    case 'bayar':
        bayar($pdo);
        break;
    case 'status':
        status($pdo);
        break;
    default:
        echo json_encode(["success" => false, "msg" => "Action tidak dikenal"]);
        break;
}

/**
 * Fungsi untuk membuat order_id unik
 */
function generateOrderId($pdo) {
    do {
        $order_id = sprintf('%013d', mt_rand(0, 9999999999999));
        $stmt = $pdo->prepare("
            SELECT 
              (SELECT COUNT(*) FROM apk_payment WHERE order_id = :order_id) +
              (SELECT COUNT(*) FROM client_payment WHERE order_id = :order_id)
        ");
        $stmt->bindParam(':order_id', $order_id);
        $stmt->execute();
        $exists = $stmt->fetchColumn();
    } while ($exists > 0);

    return $order_id;
}

/**
 * Fungsi untuk membuat instruksi pembayaran
 */
function bayar($pdo) {
    $idTagihan = intval($_POST['idTagihan'] ?? 0);
    $metode    = strtolower($_POST['paymentMethod'] ?? '');

    // Cek tagihan
    $stmt = $pdo->prepare("SELECT id_data_server, verifikasi_tagihan, keterangan, nomor_whatsapp, nama FROM v_tagihan WHERE id = :id");
    $stmt->bindParam(':id', $idTagihan, PDO::PARAM_INT);
    $stmt->execute();
    $dataTagihan = $stmt->fetch(PDO::FETCH_ASSOC);

    if (!$dataTagihan) {
        echo json_encode(["success" => false, "msg" => "Tagihan tidak ditemukan"]);
        return;
    }

    $idServer = $dataTagihan['id_data_server'];
    $amount   = $dataTagihan['verifikasi_tagihan'];
    $jumlah   = $dataTagihan['verifikasi_tagihan'];
    $note     = $dataTagihan['keterangan'];
    $nama     = $dataTagihan['nama'];
    $ewallet_phone = isset($dataTagihan['nomor_whatsapp']) 
    ? preg_replace('/\D/', '', $dataTagihan['nomor_whatsapp']) 
    : '';
    
    $stmt = $pdo->prepare("SELECT biaya_payment_gateway FROM data_server WHERE id = :id_data_server");
    $stmt->bindParam(':id_data_server', $idServer, PDO::PARAM_INT);
    $stmt->execute();
    $dataBiaya = $stmt->fetch(PDO::FETCH_ASSOC);
    
    //perhitungan biaya payment gateway
    $jenisBiaya = $dataBiaya['biaya_payment_gateway'];
    
    switch ($metode) {
        case 'qris':   $biaya = $jumlah * 0.01; break;
        case 'mandiri':$biaya = 4500; break;
        default:       $biaya = 2950; break;
    }
    
    if ($metode == 'qris') {
        if ($jenisBiaya == 2) {
            $saldo  = $jumlah - $biaya;
            $amount = $jumlah;
        } else {
            $saldo  = $jumlah;
            $amount = $jumlah + $biaya;
        }
    } else {
        if ($jenisBiaya == 2) {
            $saldo  = $jumlah - $biaya;
            $amount = $jumlah;
        } else {
            $saldo  = $jumlah;
            $amount = $jumlah + $biaya;
        }
    }
    

    if ($amount <= 0) {
        echo json_encode(["success" => false, "msg" => "Nominal tagihan tidak valid"]);
        return;
    }

    $valid_time   = ($metode === 'qris') ? 300 : 3600;
    $new_order_id = generateOrderId($pdo);

    $data = [
        'unique_code' => $new_order_id,
        'service'     => $metode,
        'amount'      => $amount,
        'note'        => $note,
        'valid_time'  => $valid_time,
        'ewallet_phone' => $ewallet_phone,
    ];

    $response   = CreateTransaction($data);
    $dataCreate = json_decode($response, true);
    
    $jenis = $dataCreate['data']['service_name'];

    if (!empty($dataCreate['success']) && $dataCreate['success'] === true) {
        $stmt = $pdo->prepare("
            INSERT INTO client_payment 
            (id_data_server, id_tagihan, order_id, data_get, status, jumlah, saldo, biaya, jenis, keterangan, nama, input_time) 
            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, NOW())
        ");
        $stmt->execute([
            $idServer,
            $idTagihan,
            $new_order_id,
            json_encode($dataCreate),
            'PENDING',
            $amount,
            $saldo,
            $biaya,
            $jenis,
            $note,
            $nama
            
        ]);

        echo json_encode([
            "success" => true,
            "msg"     => "Berhasil membuat pembayaran",
            "data"    => $dataCreate
        ]);
    } else {
        echo json_encode([
            "success" => false,
            "msg"     => "Gagal membuat pembayaran",
            "data"    => $dataCreate,
            "metode"  => $metode
        ]);
    }
}

function status($pdo) {
    $unique_code = $_POST['idTagihan'] ?? '';
    
    $data = [
        'unique_code' => $unique_code,
    ];
    $response   = statusTransaction($data);
    $dataStatus = json_decode($response, true);

    if (!empty($dataStatus['success']) && $dataStatus['success'] === true) {
        if ($dataStatus['data']['status'] == "Success") {
            $stmt = $pdo->prepare("
                UPDATE client_payment 
                SET status = :status, 
                update_time = :update_time
                WHERE order_id = :order_id
            ");
            $stmt->bindParam(':status', strtoupper($dataStatus['data']['status']));
            $stmt->bindParam(':update_time', date('Y-m-d H:i:s'));
            $stmt->bindParam(':order_id', $unique_code);
            $stmt->execute();
        }
        echo json_encode([
            "success" => true,
            "msg"     => "Berhasil cek status",
            "data"    => $dataStatus
        ]);
    } else {
        echo json_encode([
            "success" => false,
            "msg"     => "Gagal cek status",
            "data"    => $dataStatus
        ]);
    }
}