'use client';

import { useEffect, useState } from 'react';
import type { ColumnsType } from 'antd/es/table';
import { App, Button, Form, Input, Modal, Select, Table, Tag } from 'antd';
import { api, errMsg } from '@/lib/api';
import { formatUtcTime } from '@/lib/format';
import type { AdminInfo } from '@/lib/types';

const ROLES = [
  { value: 'super_admin', label: 'super_admin' },
  { value: 'finance', label: 'finance' },
  { value: 'operator', label: 'operator' },
];
// last_login_at 为 UTC 口径(datetime.now(utc)),按北京显示(勿用 new Date().toLocaleString)
const dt = (v: string | null) => (v ? formatUtcTime(v, 'YYYY-MM-DD HH:mm:ss') : '从未');

export default function AdminsPage() {
  const { message, modal } = App.useApp();
  const [admins, setAdmins] = useState<AdminInfo[]>([]);
  const [loading, setLoading] = useState(false);
  const [createOpen, setCreateOpen] = useState(false);
  const [form] = Form.useForm();

  const load = async () => {
    setLoading(true);
    try {
      const { data } = await api.get<AdminInfo[]>('/admin/api/admins');
      setAdmins(data);
    } finally {
      setLoading(false);
    }
  };
  useEffect(() => {
    load();
  }, []);

  const create = async () => {
    const v = await form.validateFields();
    try {
      await api.post('/admin/api/admins', v);
      message.success('已创建');
      setCreateOpen(false);
      form.resetFields();
      load();
    } catch (e) {
      message.error(errMsg(e));
    }
  };

  const changeRole = (a: AdminInfo, role: string) => {
    if (role === a.role) return;
    modal.confirm({
      title: `把 ${a.username} 的角色改为 ${role}?`,
      onOk: async () => {
        try {
          await api.patch(`/admin/api/admins/${a.id}`, { role });
          message.success('已更新');
          load();
        } catch (e) {
          message.error(errMsg(e));
        }
      },
    });
  };

  const toggle = (a: AdminInfo) => {
    const next = a.status === 'active' ? 'disabled' : 'active';
    modal.confirm({
      title: `${next === 'disabled' ? '禁用' : '启用'}管理员 ${a.username}?`,
      onOk: async () => {
        try {
          await api.patch(`/admin/api/admins/${a.id}`, { status: next });
          message.success('已更新');
          load();
        } catch (e) {
          message.error(errMsg(e));
        }
      },
    });
  };

  const columns: ColumnsType<AdminInfo> = [
    { title: 'ID', dataIndex: 'id', width: 70 },
    { title: '用户名', dataIndex: 'username' },
    {
      title: '角色',
      dataIndex: 'role',
      render: (r: string, a: AdminInfo) => (
        <Select
          size="small"
          value={r}
          style={{ width: 140 }}
          options={ROLES}
          onChange={(v) => changeRole(a, v)}
        />
      ),
    },
    {
      title: '状态',
      dataIndex: 'status',
      render: (s: string) => <Tag color={s === 'active' ? 'green' : 'red'}>{s}</Tag>,
    },
    { title: '最后登录', dataIndex: 'last_login_at', render: dt },
    {
      title: '操作',
      key: 'op',
      render: (_: unknown, a: AdminInfo) => (
        <a onClick={() => toggle(a)}>{a.status === 'active' ? '禁用' : '启用'}</a>
      ),
    },
  ];

  return (
    <div>
      <h2>管理员账号</h2>
      <Button type="primary" style={{ marginBottom: 16 }} onClick={() => setCreateOpen(true)}>
        新建管理员
      </Button>
      <Table rowKey="id" columns={columns} dataSource={admins} loading={loading} pagination={false} />

      <Modal
        title="新建管理员"
        open={createOpen}
        onOk={create}
        onCancel={() => setCreateOpen(false)}
        destroyOnClose
      >
        <Form form={form} layout="vertical" initialValues={{ role: 'operator' }}>
          <Form.Item name="username" label="用户名" rules={[{ required: true, min: 3 }]}>
            <Input />
          </Form.Item>
          <Form.Item name="password" label="密码(≥8 位)" rules={[{ required: true, min: 8 }]}>
            <Input.Password />
          </Form.Item>
          <Form.Item name="role" label="角色" rules={[{ required: true }]}>
            <Select options={ROLES} />
          </Form.Item>
        </Form>
      </Modal>
    </div>
  );
}