// ============================================================
// 账号管理
// ============================================================

import { useState } from 'react'
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
import { Button, message, Tag, Modal, Form, Input, Select, Popconfirm, Space } from 'antd'
import type { ProColumns } from '@ant-design/pro-components'
import { ProTable } from '@ant-design/pro-components'
import { accountService } from '@/services/accounts'
import { PageHeader } from '@/components/PageHeader'
import type { AccountPublic } from '@/types'

const roleLabels: Record<string, string> = {
  super_admin: '超级管理员',
  admin: '管理员',
  user: '用户',
}

const roleColors: Record<string, string> = {
  super_admin: 'red',
  admin: 'blue',
  user: 'default',
}

const statusLabels: Record<string, string> = {
  active: '正常',
  disabled: '已禁用',
  suspended: '已封禁',
}

const statusColors: Record<string, string> = {
  active: 'green',
  disabled: 'default',
  suspended: 'red',
}

export default function Accounts() {
  const queryClient = useQueryClient()
  const [form] = Form.useForm()
  const [modalOpen, setModalOpen] = useState(false)
  const [editingId, setEditingId] = useState<string | null>(null)
  const [searchParams, setSearchParams] = useState<Record<string, string>>({})

  const { data, isLoading } = useQuery({
    queryKey: ['accounts', searchParams],
    queryFn: ({ signal }) => accountService.list(searchParams, signal),
  })

  const updateMutation = useMutation({
    mutationFn: ({ id, data }: { id: string; data: Partial<AccountPublic> }) =>
      accountService.update(id, data),
    onSuccess: () => {
      message.success('更新成功')
      queryClient.invalidateQueries({ queryKey: ['accounts'] })
      setModalOpen(false)
    },
    onError: (err: Error) => message.error(err.message || '更新失败'),
  })

  const statusMutation = useMutation({
    mutationFn: ({ id, status }: { id: string; status: AccountPublic['status'] }) =>
      accountService.updateStatus(id, { status }),
    onSuccess: () => {
      message.success('状态更新成功')
      queryClient.invalidateQueries({ queryKey: ['accounts'] })
    },
    onError: (err: Error) => message.error(err.message || '状态更新失败'),
  })

  const columns: ProColumns<AccountPublic>[] = [
    { title: '用户名', dataIndex: 'username', width: 120, tooltip: '搜索用户名、邮箱或显示名' },
    { title: '显示名', dataIndex: 'display_name', width: 120, hideInSearch: true },
    { title: '邮箱', dataIndex: 'email', width: 180 },
    {
      title: '角色',
      dataIndex: 'role',
      width: 120,
      valueType: 'select',
      valueEnum: {
        super_admin: { text: '超级管理员' },
        admin: { text: '管理员' },
        user: { text: '用户' },
      },
      render: (_, record) => <Tag color={roleColors[record.role]}>{roleLabels[record.role] || record.role}</Tag>,
    },
    {
      title: '状态',
      dataIndex: 'status',
      width: 100,
      valueType: 'select',
      valueEnum: {
        active: { text: '正常', status: 'Success' },
        disabled: { text: '已禁用', status: 'Default' },
        suspended: { text: '已封禁', status: 'Error' },
      },
      render: (_, record) => <Tag color={statusColors[record.status]}>{statusLabels[record.status] || record.status}</Tag>,
    },
    {
      title: '2FA',
      dataIndex: 'totp_enabled',
      width: 80,
      hideInSearch: true,
      render: (_, record) => record.totp_enabled ? <Tag color="green">已启用</Tag> : <Tag>未启用</Tag>,
    },
    {
      title: 'LLM 路由',
      dataIndex: 'llm_routing',
      width: 120,
      hideInSearch: true,
      valueType: 'select',
      valueEnum: {
        relay: { text: 'SaaS 中转', status: 'Success' },
        local: { text: '本地直连', status: 'Default' },
      },
    },
    {
      title: '最后登录',
      dataIndex: 'last_login_at',
      width: 180,
      hideInSearch: true,
      render: (_, record) => record.last_login_at ? new Date(record.last_login_at).toLocaleString('zh-CN') : '-',
    },
    {
      title: '操作',
      width: 200,
      hideInSearch: true,
      render: (_, record) => (
        <Space>
          <Button
            size="small"
            onClick={() => { setEditingId(record.id); form.setFieldsValue(record); setModalOpen(true) }}
          >
            编辑
          </Button>
          {record.status === 'active' ? (
            <Popconfirm title="确定禁用此账号？" onConfirm={() => statusMutation.mutate({ id: record.id, status: 'disabled' })}>
              <Button size="small" danger>禁用</Button>
            </Popconfirm>
          ) : (
            <Popconfirm title="确定启用此账号？" onConfirm={() => statusMutation.mutate({ id: record.id, status: 'active' })}>
              <Button size="small" type="primary">启用</Button>
            </Popconfirm>
          )}
        </Space>
      ),
    },
  ]

  const handleSave = async () => {
    const values = await form.validateFields()
    if (editingId) {
      updateMutation.mutate({ id: editingId, data: values })
    }
  }

  return (
    <div>
      <PageHeader title="账号管理" description="管理系统用户账号、角色与权限" />

      <ProTable<AccountPublic>
        columns={columns}
        dataSource={data?.items ?? []}
        loading={isLoading}
        rowKey="id"
        search={{}}
        toolBarRender={() => []}
        onSubmit={(values) => {
          const filtered: Record<string, string> = {}
          for (const [k, v] of Object.entries(values)) {
            if (v !== undefined && v !== null && v !== '') {
              // Map 'username' search field to backend 'search' param
              if (k === 'username') {
                filtered.search = String(v)
              } else {
                filtered[k] = String(v)
              }
            }
          }
          setSearchParams(filtered)
        }}
        onReset={() => setSearchParams({})}
        pagination={{
          total: data?.total ?? 0,
          pageSize: data?.page_size ?? 20,
          current: data?.page ?? 1,
          showSizeChanger: false,
        }}
      />

      <Modal
        title={<span className="text-base font-semibold">编辑账号</span>}
        open={modalOpen}
        onOk={handleSave}
        onCancel={() => { setModalOpen(false); setEditingId(null); form.resetFields() }}
        confirmLoading={updateMutation.isPending}
      >
        <Form form={form} layout="vertical" className="mt-4">
          <Form.Item name="display_name" label="显示名">
            <Input />
          </Form.Item>
          <Form.Item name="email" label="邮箱">
            <Input type="email" />
          </Form.Item>
          <Form.Item name="role" label="角色">
            <Select options={[
              { value: 'super_admin', label: '超级管理员' },
              { value: 'admin', label: '管理员' },
              { value: 'user', label: '用户' },
            ]} />
          </Form.Item>
          <Form.Item name="llm_routing" label="LLM 路由模式">
            <Select options={[
              { value: 'local', label: '本地直连' },
              { value: 'relay', label: 'SaaS 中转 (Token 池)' },
            ]} />
          </Form.Item>
        </Form>
      </Modal>
    </div>
  )
}