/**
 * 支付确认：对齐 nomadvip 标准。payjsapi 异步通知未到达时，由前端直接写入 PocketBase site_vip
 */
import { NextRequest, NextResponse } from "next/server";
import {
  getApiUrlFromRequest,
  getPocketBaseConfig,
  getPaymentConfig,
  getJoinPaymentConfig,
  SITE_ID,
} from "@/config/services.config";
import { queryXorPayOrderStatus } from "@/app/lib/payment/xorpayStatus";
import { queryZPayOrderStatus } from "@/app/lib/payment/zpayStatus";

function parseUserIdFromOrderId(orderId: string): string | null {
  if (!orderId || !orderId.includes("_order_")) return null;
  const prefix = orderId.split("_order_")[0];
  if (!prefix || !prefix.includes("_")) return prefix || null;
  const parts = prefix.split("_");
  const type = parts[parts.length - 1];
  if (["vip", "video", "meetup", "book"].includes(type?.toLowerCase() || "")) {
    return parts.slice(0, -1).join("_") || null;
  }
  return prefix;
}

async function getAdminToken(): Promise<string | null> {
  const email = process.env.POCKETBASE_EMAIL || process.env.PB_ADMIN_EMAIL;
  const password = process.env.POCKETBASE_PASSWORD || process.env.PB_ADMIN_PASSWORD;
  if (!email || !password) return null;
  const pb = getPocketBaseConfig();
  const paths = ["/api/admins/auth-with-password", "/api/collections/_superusers/auth-with-password"];
  for (const path of paths) {
    const res = await fetch(`${pb.url}${path}`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ identity: email, password }),
    });
    if (res.ok) {
      const data = await res.json();
      if (data?.token) return data.token;
    }
  }
  return null;
}

function resolvePayApiUrl(request: NextRequest): string {
  const payConfig = getPaymentConfig();
  const hostHeader = request.headers.get("host") || request.headers.get("x-forwarded-host");
  return (
    (hostHeader ? getApiUrlFromRequest(hostHeader) : null) ||
    payConfig.apiUrl
  ).replace(/\/$/, "");
}

async function verifyOrderPaid(request: NextRequest, orderId: string): Promise<boolean> {
  const apiUrl = resolvePayApiUrl(request);
  const url = `${apiUrl}/digital/order_status?order_id=${encodeURIComponent(orderId)}`;
  try {
    const res = await fetch(url, { cache: "no-store" });
    const data = await res.json().catch(() => ({}));
    if (data?.paid) return true;
  } catch (e) {
    console.error("[pay/confirm] verifyOrderPaid fetch error:", e);
  }
  if (await queryXorPayOrderStatus(orderId, 5000).then((r) => r?.paid)) return true;
  if (await queryZPayOrderStatus(orderId, 5000).then((r) => r?.paid)) return true;
  return false;
}

export async function POST(request: NextRequest) {
  try {
    const body = await request.json().catch(() => ({}));
    let orderId = String(body?.order_id ?? body?.orderId ?? "").trim();
    let userId = String(body?.user_id ?? body?.userId ?? "").trim();

    if (!orderId) {
      return NextResponse.json({ ok: false, error: "缺少 order_id" }, { status: 400 });
    }
    if (!userId) {
      userId = parseUserIdFromOrderId(orderId) || "";
    }
    if (!userId) {
      return NextResponse.json({ ok: false, error: "缺少 user_id 且无法从 order_id 解析" }, { status: 400 });
    }

    const paid = await verifyOrderPaid(request, orderId);
    if (!paid) {
      return NextResponse.json({ ok: false, error: "订单未支付" }, { status: 400 });
    }

    const adminToken = await getAdminToken();
    if (!adminToken) {
      return NextResponse.json({ ok: false, error: "PocketBase 未配置" }, { status: 500 });
    }

    const pb = getPocketBaseConfig();
    const joinConfig = getJoinPaymentConfig();
    const totalFee = Number(joinConfig?.amount ?? 8800);

    const checkPayments = await fetch(
      `${pb.url}/api/collections/payments/records?filter=${encodeURIComponent(`order_id="${orderId}"`)}&perPage=1`,
      { headers: { Authorization: `Bearer ${adminToken}` } }
    );
    const paymentsData = await checkPayments.json().catch(() => ({}));
    if ((paymentsData?.items?.length ?? 0) === 0) {
      await fetch(`${pb.url}/api/collections/payments/records`, {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
          Authorization: `Bearer ${adminToken}`,
        },
        body: JSON.stringify({
          user_id: userId,
          type: "video",
          order_id: orderId,
          total_fee: totalFee,
          amount: totalFee,
          channel: "wxpay",
        }),
      });
    }

    const siteVipCheck = await fetch(
      `${pb.url}/api/collections/site_vip/records?filter=${encodeURIComponent(`user_id="${userId}" && site_id="${SITE_ID}"`)}&perPage=1`,
      { headers: { Authorization: `Bearer ${adminToken}` } }
    );
    const siteVipData = await siteVipCheck.json().catch(() => ({}));
    const siteVipItems = siteVipData?.items ?? [];

    if (siteVipItems.length > 0) {
      await fetch(`${pb.url}/api/collections/site_vip/records/${siteVipItems[0].id}`, {
        method: "PATCH",
        headers: {
          "Content-Type": "application/json",
          Authorization: `Bearer ${adminToken}`,
        },
        body: JSON.stringify({ order_id: orderId }),
      });
    } else {
      const siteVipRes = await fetch(`${pb.url}/api/collections/site_vip/records`, {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
          Authorization: `Bearer ${adminToken}`,
        },
        body: JSON.stringify({
          user_id: userId,
          site_id: SITE_ID,
          order_id: orderId,
        }),
      });
      if (!siteVipRes.ok) {
        const err = await siteVipRes.json().catch(() => ({}));
        if (!err?.data?.order_id?.message?.includes("unique") && !err?.message?.includes("unique")) {
          console.error("[pay/confirm] site_vip create failed:", await siteVipRes.text());
        }
      }
    }

    return NextResponse.json({ ok: true });
  } catch (e) {
    console.error("[pay/confirm] error:", e);
    return NextResponse.json(
      { ok: false, error: e instanceof Error ? e.message : "确认失败" },
      { status: 500 }
    );
  }
}