import { useQuery, useQueryClient } from '@tanstack/react-query';
import { useCallback, useState } from 'react';

import * as api from '../api/apiClient';
import type {
  BridgeCreateRequest,
  BridgeInfo,
  BridgeRemoveRequest,
  FullState,
  InterfaceInfo,
  RouteInfo,
} from '../types/network';
import { SnifferStatusResponse } from '../types/sniffer';

const TEN_SECONDS = 1000 * 10;
const FIVE_SECONDS = 1000 * 5;

export function useBackendAPI() {
  const queryClient = useQueryClient();

  const [interfacesEnabled, setInterfacesEnabled] = useState(false);
  const [linksEnabled, setLinksEnabled] = useState(false);
  const [routesEnabled, setRoutesEnabled] = useState(false);
  const [bridgesEnabled, setBridgesEnabled] = useState(false);
  const [fullStateEnabled, setFullStateEnabled] = useState(false);
  const [snifferStatusEnabled, setSnifferStatusEnabled] = useState(false);

  const commonOptions = {
    refetchOnWindowFocus: true,
    staleTime: TEN_SECONDS,
  };

  const interfacesQuery = useQuery<InterfaceInfo[]>({
    queryKey: ['interfaces'],
    queryFn: api.fetchInterfaces,
    enabled: interfacesEnabled,
    ...commonOptions,
  });

  const linksQuery = useQuery<InterfaceInfo[]>({
    queryKey: ['links'],
    queryFn: api.fetchLinks,
    enabled: linksEnabled,
    ...commonOptions,
  });

  const routesQuery = useQuery<RouteInfo[]>({
    queryKey: ['routes'],
    queryFn: api.fetchRoutes,
    enabled: routesEnabled,
    ...commonOptions,
  });

  const bridgesQuery = useQuery<BridgeInfo[]>({
    queryKey: ['bridges'],
    queryFn: api.fetchBridges,
    enabled: bridgesEnabled,
    ...commonOptions,
  });

  const fullStateQuery = useQuery<FullState>({
    queryKey: ['full-state'],
    queryFn: api.fetchFullState,
    enabled: fullStateEnabled,
    ...commonOptions,
  });

  const snifferStatusQuery = useQuery<SnifferStatusResponse>({
    queryKey: ['sniffer-status'],
    queryFn: api.fetchSnifferStatus,
    enabled: snifferStatusEnabled,
    ...commonOptions,
  });

  const fetchInterfaces = useCallback(async () => {
    const result = await queryClient.fetchQuery<InterfaceInfo[]>({
      queryKey: ['interfaces'],
      queryFn: api.fetchInterfaces,
      staleTime: TEN_SECONDS,
    });
    setInterfacesEnabled(true);
    return result;
  }, [queryClient]);

  const fetchLinks = useCallback(async () => {
    const result = await queryClient.fetchQuery<InterfaceInfo[]>({
      queryKey: ['links'],
      queryFn: api.fetchLinks,
      staleTime: TEN_SECONDS,
    });
    setLinksEnabled(true);
    return result;
  }, [queryClient]);

  const fetchRoutes = useCallback(async () => {
    const result = await queryClient.fetchQuery<RouteInfo[]>({
      queryKey: ['routes'],
      queryFn: api.fetchRoutes,
      staleTime: TEN_SECONDS,
    });
    setRoutesEnabled(true);
    return result;
  }, [queryClient]);

  const fetchBridges = useCallback(async () => {
    const result = await queryClient.fetchQuery<BridgeInfo[]>({
      queryKey: ['bridges'],
      queryFn: api.fetchBridges,
      staleTime: TEN_SECONDS,
    });
    setBridgesEnabled(true);
    return result;
  }, [queryClient]);

  const fetchFullState = useCallback(async () => {
    const result = await queryClient.fetchQuery<FullState>({
      queryKey: ['full-state'],
      queryFn: api.fetchFullState,
      staleTime: FIVE_SECONDS,
    });
    setFullStateEnabled(true);
    return result;
  }, [queryClient]);

  const fetchSnifferStatus = useCallback(async () => {
    const result = await queryClient.fetchQuery<SnifferStatusResponse>({
      queryKey: ['sniffer-status'],
      queryFn: api.fetchSnifferStatus,
      staleTime: FIVE_SECONDS,
    });
    setSnifferStatusEnabled(true);
    return result;
  }, [queryClient]);

  const [isCreating, setIsCreating] = useState(false);
  const [isRemoving, setIsRemoving] = useState(false);

  async function createBridge(payload: BridgeCreateRequest) {
    setIsCreating(true);
    try {
      await api.createBridge(payload);
      await queryClient.invalidateQueries({ queryKey: ['bridges'] });
      await queryClient.invalidateQueries({ queryKey: ['full-state'] });
      await queryClient.invalidateQueries({ queryKey: ['interfaces'] });
    } catch (error) {
      const message =
        error instanceof Error ? error.message : typeof error === 'string' ? error : 'Create bridge failed';
      throw new Error(message);
    } finally {
      setIsCreating(false);
    }
  }

  async function removeBridge(payload: BridgeRemoveRequest) {
    setIsRemoving(true);
    try {
      await api.removeBridge(payload);
      await queryClient.invalidateQueries({ queryKey: ['bridges'] });
      await queryClient.invalidateQueries({ queryKey: ['full-state'] });
      await queryClient.invalidateQueries({ queryKey: ['interfaces'] });
      await queryClient.invalidateQueries({ queryKey: ['sniffer-status'] });
    } catch (error) {
      const message =
        error instanceof Error ? error.message : typeof error === 'string' ? error : 'Remove bridge failed';
      throw new Error(message);
    } finally {
      setIsRemoving(false);
    }
  }

  function refreshInterfaces() {
    return queryClient.invalidateQueries({ queryKey: ['interfaces'] });
  }

  function refreshLinks() {
    return queryClient.invalidateQueries({ queryKey: ['links'] });
  }

  function refreshRoutes() {
    return queryClient.invalidateQueries({ queryKey: ['routes'] });
  }

  function refreshBridges() {
    return queryClient.invalidateQueries({ queryKey: ['bridges'] });
  }

  function refreshFullState() {
    return queryClient.invalidateQueries({ queryKey: ['full-state'] });
  }

  function refreshSnifferStatus() {
    return queryClient.invalidateQueries({ queryKey: ['sniffer-status'] });
  }

  function refreshAll() {
    refreshInterfaces();
    refreshLinks();
    refreshRoutes();
    refreshBridges();
    refreshFullState();
    refreshSnifferStatus();
  }

  return {
    interfacesQuery,
    linksQuery,
    routesQuery,
    bridgesQuery,
    fullStateQuery,
    snifferStatusQuery,
    fetchInterfaces,
    fetchLinks,
    fetchRoutes,
    fetchBridges,
    fetchFullState,
    fetchSnifferStatus,
    createBridge,
    removeBridge,
    isCreating,
    isRemoving,
    refreshInterfaces,
    refreshLinks,
    refreshRoutes,
    refreshBridges,
    refreshFullState,
    refreshSnifferStatus,
    refreshAll,
  };
}