import { useState } from "react";
import {
  Table, Button, Card, Typography, Modal, Form, Input, Select, InputNumber,
  Switch, Popconfirm, message, Tag, Empty,
} from "antd";
import { PlusOutlined, DeleteOutlined } from "@ant-design/icons";
import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
import { stockService } from "@/services/stocks";
import type { Alert } from "@/types";

const { Title } = Typography;

const ALERT_TYPES = [
  { value: "price_above", label: "价格高于" },
  { value: "price_below", label: "价格低于" },
  { value: "change_pct_above", label: "涨幅超过" },
  { value: "change_pct_below", label: "跌幅超过" },
];

export default function AlertsPage() {
  const qc = useQueryClient();
  const [modalOpen, setModalOpen] = useState(false);
  const [form] = Form.useForm();

  const { data: alerts = [], isLoading } = useQuery({
    queryKey: ["alerts"],
    queryFn: stockService.getAlerts,
  });

  const createMutation = useMutation({
    mutationFn: stockService.createAlert,
    onSuccess: () => {
      qc.invalidateQueries({ queryKey: ["alerts"] });
      message.success("预警已创建");
      setModalOpen(false);
      form.resetFields();
    },
    onError: () => message.error("创建失败"),
  });

  const deleteMutation = useMutation({
    mutationFn: stockService.deleteAlert,
    onSuccess: () => {
      qc.invalidateQueries({ queryKey: ["alerts"] });
      message.success("已删除");
    },
  });

  const toggleMutation = useMutation({
    mutationFn: stockService.toggleAlert,
    onSuccess: () => qc.invalidateQueries({ queryKey: ["alerts"] }),
  });

  const columns = [
    {
      title: "股票",
      key: "stock",
      render: (_: unknown, record: Alert) => (
        <span>
          <span style={{ color: "#e6edf3", fontWeight: 600 }}>{record.name}</span>
          <Tag style={{ marginLeft: 8, fontSize: 11 }} color="default">
            {record.symbol}
          </Tag>
        </span>
      ),
    },
    {
      title: "预警类型",
      dataIndex: "alert_type",
      key: "alert_type",
      render: (v: string) => {
        const t = ALERT_TYPES.find((t) => t.value === v);
        return <Tag color="blue">{t?.label || v}</Tag>;
      },
    },
    {
      title: "阈值",
      dataIndex: "threshold",
      key: "threshold",
      render: (v: number, record: Alert) => (
        <span style={{ color: "#e6edf3", fontWeight: 600 }}>
          {v}
          {record.alert_type.includes("pct") ? "%" : "元"}
        </span>
      ),
    },
    {
      title: "状态",
      key: "status",
      render: (_: unknown, record: Alert) => {
        if (record.triggered) return <Tag color="warning">已触发</Tag>;
        return record.is_active ? <Tag color="success">监控中</Tag> : <Tag>已暂停</Tag>;
      },
    },
    {
      title: "启用",
      key: "active",
      render: (_: unknown, record: Alert) => (
        <Switch
          checked={record.is_active}
          size="small"
          onChange={() => toggleMutation.mutate(record.id)}
          disabled={record.triggered}
        />
      ),
    },
    {
      title: "操作",
      key: "action",
      render: (_: unknown, record: Alert) => (
        <Popconfirm
          title="确认删除该预警？"
          onConfirm={() => deleteMutation.mutate(record.id)}
          okText="删除"
          cancelText="取消"
        >
          <Button
            size="small"
            type="text"
            icon={<DeleteOutlined />}
            danger
          />
        </Popconfirm>
      ),
    },
  ];

  return (
    <div>
      <div style={{ marginBottom: 16, display: "flex", alignItems: "center", gap: 12 }}>
        <Title level={4} style={{ margin: 0, color: "#e6edf3" }}>
          价格预警
        </Title>
        <Button
          type="primary"
          icon={<PlusOutlined />}
          onClick={() => setModalOpen(true)}
        >
          新建预警
        </Button>
      </div>

      <Card
        style={{ background: "#161b22", border: "1px solid #30363d" }}
        bodyStyle={{ padding: 0 }}
      >
        <Table
          rowKey="id"
          columns={columns}
          dataSource={alerts}
          loading={isLoading}
          pagination={{ pageSize: 20 }}
          locale={{ emptyText: <Empty description="暂无预警" /> }}
        />
      </Card>

      <Modal
        title="新建价格预警"
        open={modalOpen}
        onCancel={() => setModalOpen(false)}
        onOk={() => form.submit()}
        confirmLoading={createMutation.isPending}
        okText="创建"
        cancelText="取消"
        styles={{ content: { background: "#161b22" }, header: { background: "#161b22" } }}
      >
        <Form
          form={form}
          layout="vertical"
          onFinish={(values) => createMutation.mutate(values)}
        >
          <Form.Item name="symbol" label="股票代码" rules={[{ required: true }]}>
            <Input placeholder="如：600519" />
          </Form.Item>
          <Form.Item name="name" label="股票名称" rules={[{ required: true }]}>
            <Input placeholder="如：贵州茅台" />
          </Form.Item>
          <Form.Item name="alert_type" label="预警类型" rules={[{ required: true }]}>
            <Select options={ALERT_TYPES} placeholder="选择预警类型" />
          </Form.Item>
          <Form.Item name="threshold" label="阈值" rules={[{ required: true }]}>
            <InputNumber
              style={{ width: "100%" }}
              placeholder="输入阈值（价格填元，涨跌幅填%数字）"
            />
          </Form.Item>
        </Form>
      </Modal>
    </div>
  );
}