import { jsonError, jsonOk, readJsonBody } from "@/lib/server/api";
import { requireSuperAdminUser } from "@/lib/server/auth/current-user";
import { getPlatformOrganization } from "@/lib/server/account-store";
import { postOrganizationTopUp } from "@/lib/server/billing-service";
import { postWalletEntry } from "@/lib/server/billing-store";
import { createId } from "@/lib/server/ids";

export const runtime = "nodejs";

export async function POST(request: Request) {
  try {
    const operator = await requireSuperAdminUser();
    const body = await readJsonBody<Record<string, unknown>>(request);
    const organizationId = requiredString(body.organizationId, "组织");
    const organization = await getPlatformOrganization(organizationId);
    if (!organization) throw badRequest("组织不存在。");

    const amountFen = parseAmountFen(body.amountFen, body.amountYuan);
    if (amountFen <= 0) throw badRequest("请输入大于 0 的金额。");
    const direction = body.direction === "debit" ? "debit" : body.direction === "credit" ? "credit" : null;
    if (!direction) throw badRequest("余额变动方向无效。");

    const note = requiredString(body.note, "备注");
    const amountLabel = (amountFen / 100).toFixed(2);
    const idempotencyKey = `manual-adjustment:${createId("entry")}`;
    const metadata = {
      operation: direction === "credit" ? "admin_top_up" : "manual_adjustment",
      direction,
      note,
      operatorId: operator.id,
      amountYuan: amountLabel
    };
    const result = direction === "credit"
      ? await postOrganizationTopUp({
        organizationId,
        amountFen,
        idempotencyKey,
        description: `管理员上账 · ${note}`,
        metadata
      })
      : await postWalletEntry({
        organizationId,
        kind: "adjustment",
        deltaFen: -amountFen,
        idempotencyKey,
        description: `管理员扣减 · ${note}`,
        metadata
      });
    return jsonOk({ wallet: result.wallet, entry: result.entry });
  } catch (error) {
    return jsonError(error, 500, { request, source: "api.admin.billing.adjustments" });
  }
}

function parseAmountFen(amountFen: unknown, amountYuan: unknown): number {
  const fen = Number(amountFen);
  if (Number.isFinite(fen) && fen > 0) return Math.round(fen);
  const yuan = Number(amountYuan);
  if (!Number.isFinite(yuan) || yuan <= 0) return 0;
  return Math.round(yuan * 100);
}

function requiredString(value: unknown, label: string): string {
  const normalized = optionalString(value);
  if (!normalized) throw badRequest(`${label}不能为空。`);
  return normalized;
}

function optionalString(value: unknown): string | undefined {
  return typeof value === "string" && value.trim() ? value.trim() : undefined;
}

function badRequest(message: string): Error & { status: number } {
  return Object.assign(new Error(message), { status: 400 });
}