// src/components/Sniffing.tsx
import {
  CheckCircleOutlined,
  ExclamationCircleOutlined,
  PlayCircleOutlined,
  ReloadOutlined,
  StopOutlined,
  SyncOutlined,
} from '@ant-design/icons';
import { Button, Card, Col, Divider, List, message, Row, Select, Space, Spin, Tag, Tooltip, Typography } from 'antd';
import { ReactElement, useCallback, useEffect, useState } from 'react';
import { fetchSnifferStatus as fetchSnifferStatusApi, startSniffer, stopSniffer } from '../api/apiClient';
import { useBackendAPI } from '../hooks/useBackendAPI';
import { InterfaceSnifferStatus } from '../types/sniffer';

const { Title, Text } = Typography;
const { Option } = Select;

/** Local type for the interface objects returned by your backend/hook.
 *  Adjust fields if your backend has different shape.
 */
type NetworkInterface = {
  ifindex: number;
  name: string;
  state?: string;
  mac?: string;
  mtu?: number;
  flags?: string[];
  addresses?: string[];
};

export default function Sniffing(): ReactElement {
  const {
    interfacesQuery,
    bridgesQuery,
    fetchInterfaces,
    fetchBridges,
    refreshInterfaces,
    refreshBridges,
    snifferStatusQuery,
  } = useBackendAPI();

  // local UI state
  const [selectedInterface, setSelectedInterface] = useState<string | undefined>(undefined);
  const [busy, setBusy] = useState(false);

  // ensure data is fetched on mount
  useEffect(() => {
    fetchInterfaces().catch(() => {});
    fetchSnifferStatusApi().catch(() => {});
    if (fetchBridges) fetchBridges().catch(() => {});
  }, [fetchInterfaces, fetchBridges]);

  // Properly type interfaces as array of objects (not string[])
  const interfaces = (interfacesQuery?.data ?? []) as NetworkInterface[];
  const bridges = (bridgesQuery?.data ?? []) as Array<{ name: string }>;

  const statusMap = (snifferStatusQuery?.data?.interfaces ?? {}) as Record<string, InterfaceSnifferStatus>;

  // Explicitly type entries so renderItem knows the types
  const statusEntries = Object.entries(statusMap) as [string, InterfaceSnifferStatus][];

  const refreshAll = useCallback(async () => {
    try {
      if (refreshInterfaces) await refreshInterfaces();
      if (snifferStatusQuery?.refetch) await snifferStatusQuery.refetch();
      if (refreshBridges) await refreshBridges();
    } catch {
      // ignore — queries will surface errors
    }
  }, [refreshInterfaces, snifferStatusQuery, refreshBridges]);

  // actions
  const handleStart = async () => {
    if (!selectedInterface) {
      message.warning('Please select an interface to start sniffing on.');
      return;
    }
    setBusy(true);
    try {
      await startSniffer({ bridge: selectedInterface });
      message.success(`Sniffer started on ${selectedInterface}`);
      await refreshAll();
    } catch (err: any) {
      console.error('startSniffer error', err);
      message.error(err?.message ?? 'Failed to start sniffer');
    } finally {
      setBusy(false);
    }
  };

  const handleStop = async () => {
    setBusy(true);
    try {
      await stopSniffer();
      message.success('Sniffer stopped');
      await refreshAll();
    } catch (err: any) {
      console.error('stopSniffer error', err);
      message.error(err?.message ?? 'Failed to stop sniffer');
    } finally {
      setBusy(false);
    }
  };

  // Quick action per-interface (start/stop)
  const handleStartOn = async (ifaceName: string) => {
    setBusy(true);
    try {
      await startSniffer({ bridge: ifaceName });
      message.success(`Started sniffer on ${ifaceName}`);
      await refreshAll();
    } catch (err: any) {
      console.error('handleStartOn error', err);
      message.error(err?.message ?? `Failed to start on ${ifaceName}`);
    } finally {
      setBusy(false);
    }
  };

  const handleStopFromList = async (ifaceName?: string) => {
    setBusy(true);
    try {
      await stopSniffer();
      message.success(`Stopped sniffer${ifaceName ? ` (requested from ${ifaceName})` : ''}`);
      await refreshAll();
    } catch (err: any) {
      console.error('handleStopFromList error', err);
      message.error(err?.message ?? 'Failed to stop sniffer');
    } finally {
      setBusy(false);
    }
  };

  return (
    <div style={{ padding: 16 }}>
      <Row gutter={[16, 16]}>
        <Col span={16}>
          <Card>
            <Row justify="space-between" align="middle">
              <Col>
                <Title level={4} style={{ margin: 0 }}>
                  Sniffing
                </Title>
                <Text type="secondary">Start, stop and view AF_PACKET sniffer status</Text>
              </Col>

              <Col>
                <Space>
                  <Tooltip title="Refresh interfaces & status">
                    <Button icon={<ReloadOutlined />} onClick={() => refreshAll()} disabled={busy} />
                  </Tooltip>

                  <Tooltip title="Refresh sniffer status">
                    <Button
                      icon={<SyncOutlined spin={snifferStatusQuery?.isFetching} />}
                      onClick={() => snifferStatusQuery?.refetch?.()}
                      disabled={busy}
                    />
                  </Tooltip>
                </Space>
              </Col>
            </Row>

            <Divider />

            <Space direction="vertical" size="middle" style={{ width: '100%' }}>
              <Row gutter={[12, 12]} align="middle">
                <Col>
                  <Text strong>Select interface / bridge</Text>
                </Col>

                <Col flex="1">
                  <Select
                    showSearch
                    placeholder="Choose interface or bridge"
                    style={{ width: '100%' }}
                    value={selectedInterface}
                    onChange={(val) => setSelectedInterface(val as string | undefined)}
                    loading={interfacesQuery?.isLoading}
                    allowClear
                    optionFilterProp="children"
                    filterOption={(input, option) =>
                      (option?.children as unknown as string)?.toLowerCase().includes(input.toLowerCase())
                    }
                  >
                    {/* interfaces from the system: use iface.name */}
                    {interfaces.map((iface) => (
                      <Option key={`if:${iface.name}`} value={iface.name}>
                        {iface.name}
                      </Option>
                    ))}

                    {/* optional bridges (if present) */}
                    {bridges && bridges.length > 0 && (
                      <>
                        <Option key="__divider__" value="__divider__" disabled>
                          ────────── bridges ──────────
                        </Option>
                        {bridges.map((b) => (
                          <Option key={`br:${b.name}`} value={b.name}>
                            {b.name}
                          </Option>
                        ))}
                      </>
                    )}
                  </Select>
                </Col>

                <Col>
                  <Space>
                    <Button
                      type="primary"
                      icon={<PlayCircleOutlined />}
                      onClick={handleStart}
                      loading={busy && !snifferStatusQuery?.isFetching}
                      disabled={
                        !selectedInterface || busy || (selectedInterface && statusMap[selectedInterface]?.running)
                      }
                    >
                      Start
                    </Button>

                    <Button
                      danger
                      icon={<StopOutlined />}
                      onClick={handleStop}
                      loading={busy && !snifferStatusQuery?.isFetching}
                      disabled={busy}
                    >
                      Stop
                    </Button>
                  </Space>
                </Col>
              </Row>

              <Row>
                <Col span={24}>
                  <Text type="secondary">Tip: you can also start/stop directly from the list below.</Text>
                </Col>
              </Row>
            </Space>
          </Card>

          <Divider />

          <Card title="Sniffer status" bordered>
            {snifferStatusQuery?.isLoading ? (
              <div style={{ textAlign: 'center', padding: 24 }}>
                <Spin />
              </div>
            ) : snifferStatusQuery?.isError ? (
              <div style={{ padding: 12 }}>
                <Space direction="vertical">
                  <Text type="danger">Failed to load sniffer status.</Text>
                  <Text type="secondary">
                    {(snifferStatusQuery?.error as any)?.message ?? String(snifferStatusQuery?.error)}
                  </Text>
                </Space>
              </div>
            ) : statusEntries.length === 0 ? (
              <div style={{ padding: 12 }}>
                <Text type="secondary">No status information available.</Text>
              </div>
            ) : (
              <List
                dataSource={statusEntries}
                renderItem={([name, st]: [string, InterfaceSnifferStatus]) => {
                  const running = st.running;
                  const exists = st.exists;
                  const up = st.up;
                  return (
                    <List.Item
                      actions={[
                        running ? (
                          <Button
                            key="stop"
                            size="small"
                            icon={<StopOutlined />}
                            onClick={() => handleStopFromList(name)}
                            disabled={busy}
                          >
                            Stop
                          </Button>
                        ) : (
                          <Button
                            key="start"
                            size="small"
                            type="primary"
                            icon={<PlayCircleOutlined />}
                            onClick={() => handleStartOn(name)}
                            disabled={busy}
                          >
                            Start
                          </Button>
                        ),
                      ]}
                    >
                      <List.Item.Meta
                        title={
                          <Space>
                            <Text strong>{name}</Text>
                            {running ? (
                              <Tag icon={<CheckCircleOutlined />} color="success">
                                running
                              </Tag>
                            ) : (
                              <Tag icon={<ExclamationCircleOutlined />} color="default">
                                stopped
                              </Tag>
                            )}

                            {!exists && <Tag color="error">missing</Tag>}
                            {exists && !up && <Tag color="warning">down</Tag>}
                            {exists && up && <Tag color="processing">up</Tag>}
                          </Space>
                        }
                        description={
                          <Space size="small">
                            <Text type="secondary">interface: {name}</Text>
                          </Space>
                        }
                      />
                    </List.Item>
                  );
                }}
              />
            )}
          </Card>
        </Col>

        <Col span={8}>
          <Card title="Quick actions" size="small" bordered>
            <Space direction="vertical" style={{ width: '100%' }}>
              <Button icon={<ReloadOutlined />} onClick={() => refreshAll()} block disabled={busy}>
                Refresh all
              </Button>

              <Button icon={<SyncOutlined />} onClick={() => snifferStatusQuery?.refetch?.()} block disabled={busy}>
                Refresh status
              </Button>

              <Divider />

              <Button
                icon={<PlayCircleOutlined />}
                onClick={() => {
                  // start on selected, fallback to first available interface
                  const target = selectedInterface ?? interfaces[0]?.name;
                  if (!target) {
                    message.warning('No interface selected / available');
                    return;
                  }
                  setSelectedInterface(target);
                  handleStartOn(target);
                }}
                block
                disabled={busy || interfaces.length === 0}
              >
                Start on selected / first
              </Button>

              <Button danger icon={<StopOutlined />} onClick={() => handleStop()} block disabled={busy}>
                Stop sniffer
              </Button>
            </Space>
          </Card>

          <Card title="Available interfaces" size="small" style={{ marginTop: 12 }}>
            {interfacesQuery?.isLoading ? (
              <Spin />
            ) : interfaces.length === 0 ? (
              <Text type="secondary">No interfaces found.</Text>
            ) : (
              <List
                size="small"
                dataSource={interfaces}
                renderItem={(iface: NetworkInterface) => <List.Item>{iface.name}</List.Item>}
              />
            )}
          </Card>

          <Card title="Bridges" size="small" style={{ marginTop: 12 }}>
            {bridgesQuery?.isLoading ? (
              <Spin />
            ) : bridges.length === 0 ? (
              <Text type="secondary">No bridges found.</Text>
            ) : (
              <List
                size="small"
                dataSource={bridges}
                renderItem={(b: { name: string }) => <List.Item>{b.name}</List.Item>}
              />
            )}
          </Card>
        </Col>
      </Row>
    </div>
  );
}