// ============================================================
// 服务商管理
// ============================================================

import { useState } from 'react'
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
import { Button, message, Tag, Modal, Form, Input, InputNumber, Switch, Space, Popconfirm, Typography } from 'antd'
import { PlusOutlined } from '@ant-design/icons'
import type { ProColumns } from '@ant-design/pro-components'
import { ProTable } from '@ant-design/pro-components'
import { providerService } from '@/services/providers'
import type { Provider, ProviderKey } from '@/types'

const { Text } = Typography

export default function Providers() {
  const queryClient = useQueryClient()
  const [form] = Form.useForm()
  const [modalOpen, setModalOpen] = useState(false)
  const [editingId, setEditingId] = useState<string | null>(null)
  const [keyModalProviderId, setKeyModalProviderId] = useState<string | null>(null)

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

  const { data: keysData, isLoading: keysLoading } = useQuery({
    queryKey: ['provider-keys', keyModalProviderId],
    queryFn: ({ signal }) => providerService.listKeys(keyModalProviderId!, signal),
    enabled: !!keyModalProviderId,
  })

  const createMutation = useMutation({
    mutationFn: (data: Partial<Omit<Provider, 'id' | 'created_at' | 'updated_at'>>) =>
      providerService.create(data),
    onSuccess: () => {
      message.success('创建成功')
      queryClient.invalidateQueries({ queryKey: ['providers'] })
      setModalOpen(false)
      form.resetFields()
    },
    onError: (err: Error) => message.error(err.message || '创建失败'),
  })

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

  const deleteMutation = useMutation({
    mutationFn: (id: string) => providerService.delete(id),
    onSuccess: () => {
      message.success('删除成功')
      queryClient.invalidateQueries({ queryKey: ['providers'] })
    },
    onError: (err: Error) => message.error(err.message || '删除失败'),
  })

  const columns: ProColumns<Provider>[] = [
    { title: '名称', dataIndex: 'display_name', width: 140 },
    { title: '标识', dataIndex: 'name', width: 120, render: (_, r) => <Text code>{r.name}</Text> },
    { title: '协议', dataIndex: 'api_protocol', width: 100 },
    { title: 'RPM 限制', dataIndex: 'rate_limit_rpm', width: 100, render: (_, r) => r.rate_limit_rpm ?? '-' },
    {
      title: '状态',
      dataIndex: 'enabled',
      width: 80,
      render: (_, r) => r.enabled ? <Tag color="green">启用</Tag> : <Tag>禁用</Tag>,
    },
    {
      title: '操作',
      width: 260,
      render: (_, record) => (
        <Space>
          <Button size="small" onClick={() => { setEditingId(record.id); form.setFieldsValue(record); setModalOpen(true) }}>
            编辑
          </Button>
          <Button size="small" onClick={() => setKeyModalProviderId(record.id)}>
            Key Pool
          </Button>
          <Popconfirm title="确定删除此服务商？" onConfirm={() => deleteMutation.mutate(record.id)}>
            <Button size="small" danger>删除</Button>
          </Popconfirm>
        </Space>
      ),
    },
  ]

  const keyColumns: ProColumns<ProviderKey>[] = [
    { title: '标签', dataIndex: 'key_label', width: 120 },
    { title: '优先级', dataIndex: 'priority', width: 80 },
    { title: '请求数', dataIndex: 'total_requests', width: 80 },
    { title: 'Token 数', dataIndex: 'total_tokens', width: 100 },
    {
      title: '状态',
      dataIndex: 'is_active',
      width: 80,
      render: (_, r) => r.is_active ? <Tag color="green">活跃</Tag> : <Tag>冷却</Tag>,
    },
  ]

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

  return (
    <div>
      <ProTable<Provider>
        columns={columns}
        dataSource={data?.items ?? []}
        loading={isLoading}
        rowKey="id"
        search={false}
        toolBarRender={() => [
          <Button key="add" type="primary" icon={<PlusOutlined />} onClick={() => { setEditingId(null); form.resetFields(); setModalOpen(true) }}>
            新建服务商
          </Button>,
        ]}
        pagination={{
          total: data?.total ?? 0,
          pageSize: data?.page_size ?? 20,
          current: data?.page ?? 1,
          showSizeChanger: false,
        }}
      />

      <Modal
        title={editingId ? '编辑服务商' : '新建服务商'}
        open={modalOpen}
        onOk={handleSave}
        onCancel={() => { setModalOpen(false); setEditingId(null); form.resetFields() }}
        confirmLoading={createMutation.isPending || updateMutation.isPending}
      >
        <Form form={form} layout="vertical">
          <Form.Item name="name" label="标识" rules={[{ required: true }]}>
            <Input disabled={!!editingId} />
          </Form.Item>
          <Form.Item name="display_name" label="显示名称" rules={[{ required: true }]}>
            <Input />
          </Form.Item>
          <Form.Item name="base_url" label="Base URL" rules={[{ required: true }]}>
            <Input />
          </Form.Item>
          <Form.Item name="api_protocol" label="API 协议">
            <Input placeholder="openai" />
          </Form.Item>
          <Form.Item name="enabled" label="启用" valuePropName="checked">
            <Switch />
          </Form.Item>
          <Form.Item name="rate_limit_rpm" label="RPM 限制">
            <InputNumber min={0} style={{ width: '100%' }} />
          </Form.Item>
        </Form>
      </Modal>

      <Modal
        title="Key Pool"
        open={!!keyModalProviderId}
        onCancel={() => setKeyModalProviderId(null)}
        footer={null}
        width={700}
      >
        <ProTable<ProviderKey>
          columns={keyColumns}
          dataSource={keysData ?? []}
          loading={keysLoading}
          rowKey="id"
          search={false}
          toolBarRender={false}
          pagination={false}
          size="small"
        />
      </Modal>
    </div>
  )
}