import { dbGlobal } from "drizzle-pkg/lib/db";
import { users } from "drizzle-pkg/lib/schema/auth";
import { eq } from "drizzle-orm";
import log4js from "logger";
import { requireAdmin } from "#server/utils/admin-guard";

const logger = log4js.getLogger("USERS");

export default defineWrappedResponseHandler(async (event) => {
  const id = Number(event.context.params?.id);
  const body = await readBody(event);
  requireAdmin(event);

  if (!id || isNaN(id)) {
    throw createError({
      statusCode: 400,
      statusMessage: "无效的用户ID",
    });
  }

  // Validate email format if provided
  if (body.email !== undefined && body.email !== "" && !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(body.email)) {
    throw createError({
      statusCode: 400,
      statusMessage: "邮箱格式不正确",
    });
  }

  // Validate role
  if (body.role && !["admin", "user"].includes(body.role)) {
    throw createError({
      statusCode: 400,
      statusMessage: "无效的角色",
    });
  }

  // Validate status
  if (body.status && !["active", "disabled"].includes(body.status)) {
    throw createError({
      statusCode: 400,
      statusMessage: "无效的状态",
    });
  }

  // Check user exists
  const [existing] = await dbGlobal
    .select({ id: users.id })
    .from(users)
    .where(eq(users.id, id));

  if (!existing) {
    throw createError({
      statusCode: 404,
      statusMessage: "用户不存在",
    });
  }

  // Build update data
  const updateData: Partial<{
    nickname: string | null;
    email: string | null;
    role: "admin" | "user";
    status: "active" | "disabled";
  }> = {};

  if (body.nickname !== undefined) updateData.nickname = body.nickname || null;
  if (body.email !== undefined) updateData.email = body.email || null;
  if (body.role !== undefined) updateData.role = body.role;
  if (body.status !== undefined) updateData.status = body.status;

  // Perform update
  const [updated] = await dbGlobal
    .update(users)
    .set(updateData)
    .where(eq(users.id, id))
    .returning({
      id: users.id,
      username: users.username,
      email: users.email,
      nickname: users.nickname,
      avatar: users.avatar,
      role: users.role,
      status: users.status,
      createdAt: users.createdAt,
    });

  if (!updated) {
    throw createError({
      statusCode: 404,
      statusMessage: "用户更新失败",
    });
  }

  logger.info("user updated by admin: %s (id: %d)", updated.username, id);
  return R.success(updated);
});