// ============================================================
// 模型管理
// ============================================================

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

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

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

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

  const createMutation = useMutation({
    mutationFn: (data: Partial<Omit<Model, 'id'>>) => modelService.create(data),
    onSuccess: () => {
      message.success('创建成功')
      queryClient.invalidateQueries({ queryKey: ['models'] })
      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<Model, 'id'>> }) =>
      modelService.update(id, data),
    onSuccess: () => {
      message.success('更新成功')
      queryClient.invalidateQueries({ queryKey: ['models'] })
      setModalOpen(false)
    },
    onError: (err: Error) => message.error(err.message || '更新失败'),
  })

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

  const columns: ProColumns<Model>[] = [
    { title: '模型 ID', dataIndex: 'model_id', width: 180, render: (_, r) => <code>{r.model_id}</code> },
    { title: '别名', dataIndex: 'alias', width: 140 },
    {
      title: '服务商',
      dataIndex: 'provider_id',
      width: 140,
      hideInSearch: true,
      render: (_, r) => {
        const provider = providersData?.items?.find((p) => p.id === r.provider_id)
        return provider?.display_name || r.provider_id.substring(0, 8)
      },
    },
    { title: '上下文窗口', dataIndex: 'context_window', width: 110, hideInSearch: true, render: (_, r) => r.context_window?.toLocaleString() },
    { title: '最大输出', dataIndex: 'max_output_tokens', width: 100, hideInSearch: true, render: (_, r) => r.max_output_tokens?.toLocaleString() },
    {
      title: '流式',
      dataIndex: 'supports_streaming',
      width: 70,
      hideInSearch: true,
      render: (_, r) => r.supports_streaming ? <Tag color="green">是</Tag> : <Tag>否</Tag>,
    },
    {
      title: '视觉',
      dataIndex: 'supports_vision',
      width: 70,
      hideInSearch: true,
      render: (_, r) => r.supports_vision ? <Tag color="blue">是</Tag> : <Tag>否</Tag>,
    },
    {
      title: '状态',
      dataIndex: 'enabled',
      width: 70,
      hideInSearch: true,
      render: (_, r) => r.enabled ? <Tag color="green">启用</Tag> : <Tag>禁用</Tag>,
    },
    {
      title: '操作',
      width: 160,
      hideInSearch: true,
      render: (_, record) => (
        <Space>
          <Button size="small" onClick={() => { setEditingId(record.id); form.setFieldsValue(record); setModalOpen(true) }}>
            编辑
          </Button>
          <Popconfirm title="确定删除此模型？" onConfirm={() => deleteMutation.mutate(record.id)}>
            <Button size="small" danger>删除</Button>
          </Popconfirm>
        </Space>
      ),
    },
  ]

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

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

      <Modal
        title={editingId ? '编辑模型' : '新建模型'}
        open={modalOpen}
        onOk={handleSave}
        onCancel={() => { setModalOpen(false); setEditingId(null); form.resetFields() }}
        confirmLoading={createMutation.isPending || updateMutation.isPending}
        width={600}
      >
        <Form form={form} layout="vertical">
          <Form.Item name="provider_id" label="服务商" rules={[{ required: true }]}>
            <Select
              options={(providersData?.items ?? []).map((p) => ({ value: p.id, label: p.display_name }))}
              placeholder="选择服务商"
            />
          </Form.Item>
          <Form.Item name="model_id" label="模型 ID" rules={[{ required: true }]}>
            <Input placeholder="如 gpt-4o" />
          </Form.Item>
          <Form.Item name="alias" label="别名">
            <Input />
          </Form.Item>
          <Form.Item name="context_window" label="上下文窗口">
            <InputNumber min={0} style={{ width: '100%' }} />
          </Form.Item>
          <Form.Item name="max_output_tokens" label="最大输出 Token">
            <InputNumber min={0} style={{ width: '100%' }} />
          </Form.Item>
          <Form.Item name="enabled" label="启用" valuePropName="checked">
            <Switch />
          </Form.Item>
          <Form.Item name="supports_streaming" label="支持流式" valuePropName="checked">
            <Switch />
          </Form.Item>
          <Form.Item name="supports_vision" label="支持视觉" valuePropName="checked">
            <Switch />
          </Form.Item>
          <Form.Item name="pricing_input" label="输入价格 (每百万 Token)">
            <InputNumber min={0} step={0.01} style={{ width: '100%' }} />
          </Form.Item>
          <Form.Item name="pricing_output" label="输出价格 (每百万 Token)">
            <InputNumber min={0} step={0.01} style={{ width: '100%' }} />
          </Form.Item>
        </Form>
      </Modal>
    </div>
  )
}