<?php
declare(strict_types=1);

namespace Soon\Api\Controllers;

use Soon\Api\Core\Json;
use Soon\Api\Middleware\Auth;
use Soon\Api\Services\MembershipService;
use Soon\Api\Services\AlipayClient;
use Soon\Api\Services\PayService;
use Soon\Api\Services\WeChatPay\Client as WeChatClient;

final class PayController
{
    public function listMyOrders(): void
    {
        $u = Auth::require();
        $page = max(1, (int)($_GET['page'] ?? 1));
        $size = max(1, min(50, (int)($_GET['size'] ?? 8)));
        Json::ok(MembershipService::listOrders($u['id'], $page, $size));
    }

    public function createOrder(): void
    {
        $u = Auth::require();
        $body = Json::readBody();
        $planId = (int)($body['plan_id'] ?? 0);
        $channel = (string)($body['channel'] ?? 'alipay');
        if (!in_array($channel, ['alipay', 'wechat'], true)) {
            Json::fail('bad_request', '不支持的支付方式', 400);
        }
        $ip = $_SERVER['REMOTE_ADDR'] ?? '';
        Json::ok(PayService::createOrder($u['id'], $planId, $channel, $ip));
    }

    public function checkoutOrder(string $orderNo): void
    {
        $u = Auth::require();
        $body = Json::readBody();
        $channel = isset($body['channel']) ? (string)$body['channel'] : null;
        if ($channel !== null && !in_array($channel, ['alipay', 'wechat'], true)) {
            Json::fail('bad_request', '不支持的支付方式', 400);
        }
        $ip = $_SERVER['REMOTE_ADDR'] ?? '';
        Json::ok(PayService::checkoutOrderForUser($u['id'], $orderNo, $ip, $channel));
    }

    public function cancelOrder(string $orderNo): void
    {
        $u = Auth::require();
        PayService::cancelPendingForUser($u['id'], $orderNo);
        Json::ok(['order_no' => $orderNo, 'status' => 'cancelled']);
    }

    public function showOrder(string $orderNo): void
    {
        $u = Auth::require();
        $order = PayService::findByOrderNoForUser($orderNo, $u['id']);
        if ($order === null) {
            Json::fail('not_found', '订单不存在', 404);
        }
        Json::ok([
            'order_no' => $order['order_no'],
            'status' => $order['status'],
            'amount_cents' => (int)$order['amount_cents'],
            'channel' => $order['channel'],
            'paid_at' => $order['paid_at'],
            'refund_status' => $order['refund_status'] ?? 'none',
            'refund_reason' => $order['refund_reason'] ?? null,
        ]);
    }

    public function requestRefund(string $orderNo): void
    {
        $u = Auth::require();
        $body = Json::readBody();
        $reason = trim((string)($body['reason'] ?? ''));
        PayService::requestRefund($u['id'], $orderNo, $reason);
        Json::ok(['order_no' => $orderNo, 'refund_status' => 'pending']);
    }

    public function alipayNotify(): void
    {
        $raw = file_get_contents('php://input') ?: '';
        parse_str($raw, $params);
        if (empty($params) && !empty($_POST)) {
            $params = $_POST;
        }
        if (!AlipayClient::verifyNotify($params)) {
            http_response_code(400);
            echo 'fail';
            exit;
        }
        $status = (string)($params['trade_status'] ?? '');
        if (!in_array($status, ['TRADE_SUCCESS', 'TRADE_FINISHED'], true)) {
            echo 'success';
            exit;
        }
        $orderNo = (string)($params['out_trade_no'] ?? '');
        $tradeNo = (string)($params['trade_no'] ?? '');
        $amountCents = (int)round((float)($params['total_amount'] ?? 0) * 100);
        if (PayService::markPaid($orderNo, 'alipay', $tradeNo, $amountCents)) {
            echo 'success';
        } else {
            echo 'fail';
        }
        exit;
    }

    public function wechatNotify(): void
    {
        $body = file_get_contents('php://input') ?: '';
        $signature = $_SERVER['HTTP_WEIXINPAY_SIGNATURE'] ?? $_SERVER['HTTP_WEIXINPAY2_SIGNATURE'] ?? '';
        $serial = $_SERVER['HTTP_WEIXINPAY_SERIAL'] ?? $_SERVER['HTTP_WEIXINPAY2_SERIAL'] ?? '';
        $timestamp = $_SERVER['HTTP_WEIXINPAY_TIMESTAMP'] ?? $_SERVER['HTTP_WEIXINPAY2_TIMESTAMP'] ?? '';
        $nonce = $_SERVER['HTTP_WEIXINPAY_NONCE'] ?? $_SERVER['HTTP_WEIXINPAY2_NONCE'] ?? '';
        if (!WeChatClient::verifyNotify($body, $signature, $serial, $timestamp, $nonce)) {
            http_response_code(401);
            header('Content-Type: application/json');
            echo json_encode(['code' => 'FAIL', 'message' => '验签失败']);
            exit;
        }
        $data = json_decode($body, true);
        $plain = WeChatClient::decryptResource(
            (string)($data['resource']['ciphertext'] ?? ''),
            (string)($data['resource']['associated_data'] ?? ''),
            (string)($data['resource']['nonce'] ?? ''),
            (string)\Soon\Api\Core\Config::get('wechat.api_v3_key', '')
        );
        if ($plain === null) {
            http_response_code(400);
            header('Content-Type: application/json');
            echo json_encode(['code' => 'FAIL', 'message' => '解密失败']);
            exit;
        }
        $decoded = json_decode($plain, true);
        $orderNo = (string)($decoded['out_trade_no'] ?? '');
        $txnId = (string)($decoded['transaction_id'] ?? '');
        $amountCents = (int)($decoded['amount']['total'] ?? 0);
        $tradeState = (string)($decoded['trade_state'] ?? '');
        if ($tradeState !== '' && $tradeState !== 'SUCCESS') {
            header('Content-Type: application/json');
            echo json_encode(['code' => 'SUCCESS']);
            exit;
        }
        if (!PayService::markPaid($orderNo, 'wechat', $txnId, $amountCents)) {
            http_response_code(400);
            header('Content-Type: application/json');
            echo json_encode(['code' => 'FAIL', 'message' => '订单处理失败']);
            exit;
        }
        header('Content-Type: application/json');
        echo json_encode(['code' => 'SUCCESS']);
        exit;
    }
}