import React, { useState } from "react";
import { Card, Form, Input, Switch, Button, message } from "antd";
import { useNavigate } from "react-router-dom";
import { userToolsSetApi } from "../services/api";

const UserAdd = () => {
  const [form] = Form.useForm();
  const [loading, setLoading] = useState(false);
  const navigate = useNavigate();

  const onFinish = async (values) => {
    const name = String(values.name || "").trim();
    if (!name) {
      message.error("请输入有效的用户名");
      return;
    }
    // 先查询是否已存在同名用户（admin 能查询到所有用户）
    try {
      const usersRes = await userToolsSetApi.getUsers();
      const users = usersRes.data?.users || [];
      const exists = users.some((u) => String(u.name).trim().toLowerCase() === name.toLowerCase());
      if (exists) {
        message.error("用户名已存在");
        return;
      }
    } catch (err) {
      // 查询失败不影响后续创建，但提示一下
      console.warn("检查用户名重名失败", err);
    }

    const payload = {
      name,
      password: values.password,
      is_admin: values.is_admin ? 1 : 0,
    };
    try {
      setLoading(true);
      const res = await userToolsSetApi.addUser(payload);
      if (res.data?.success) {
        message.success("新增用户成功");
        navigate("/user-tools-set", { replace: true });
      } else {
        message.error(res.data?.error || "新增失败");
      }
    } catch (error) {
      if (error?.response?.status === 409) {
        message.error("用户名已存在");
      } else {
        message.error(error.response?.data?.error || "新增失败");
      }
    } finally {
      setLoading(false);
    }
  };

  return (
    <Card
      title="新增用户"
      extra={<Button onClick={() => navigate(-1)}>返回</Button>}
    >
      <Form
        form={form}
        layout="vertical"
        onFinish={onFinish}
      >
        <Form.Item
          label="用户名"
          name="name"
          rules={[{ required: true, message: "请输入用户名" }]}
        >
          <Input placeholder="请输入用户名" />
        </Form.Item>
        <Form.Item
          label="用户密码"
          name="password"
          rules={[{ required: true, message: "请输入用户密码" }]}
        >
          <Input.Password placeholder="请输入用户密码" />
        </Form.Item>
        <Form.Item
          label="是否管理员"
          name="is_admin"
          valuePropName="checked"
        >
          <Switch
            checkedChildren="管理员"
            unCheckedChildren="普通用户"
          />
        </Form.Item>
        <Form.Item>
          <div className="flex justify-center">
            <Button
              type="primary"
              htmlType="submit"
              loading={loading}
            >
              保存
            </Button>
          </div>
        </Form.Item>
      </Form>
    </Card>
  );
};

export default UserAdd;