import React from "react";
import {SafeAreaView, View, Button, } from "react-native";

import NetInfo from "@react-native-community/netinfo";
import {useMutation, QueryClient, onlineManager} from "@tanstack/react-query";
import {PersistQueryClientProvider} from "@tanstack/react-query-persist-client";
import {createAsyncStoragePersister} from "@tanstack/query-async-storage-persister";
import AsyncStorage from "@react-native-async-storage/async-storage";

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      gcTime: 1000 * 60 * 60 * 24, // 24 hours
    },
    mutations: {
      cacheTime: 1000 * 60 * 60 * 24 * 2, // 2 days
    },
  },
});

onlineManager.setEventListener((setOnline) => {
  return NetInfo.addEventListener((state) => {
    setOnline(!!state.isConnected);
    if (state.isConnected)
      queryClient.resumePausedMutations();
  });
});


const asyncStoragePersister = createAsyncStoragePersister({
  storage: AsyncStorage,
});


// Define the "addTodo" mutation
queryClient.setMutationDefaults(["addTodo"], {
  mutationFn: ({ page }) => {
    return makeCall(page);
  },
  retry: Infinity,
  networkMode: "offline",
});


function makeCall(page) {
  console.log('mutations: ' + queryClient.getMutationCache().getAll().length);
  console.log(queryClient.getMutationCache().getAll());
  return fetch(`http://192.168.178.42:8080/${page}`)
    .then(response => {
      return response;
    })
    .catch(error => {
      throw error;
    });
}

function App() {
  return (
    <PersistQueryClientProvider
      client={queryClient}
      persistOptions={{ persister: asyncStoragePersister }}
      onSuccess={() => {
        // resume mutations after initial restore from localStorage was successful
        queryClient.resumePausedMutations()
      }}
    >
      <SafeAreaView>
        <View>
          <ReqButton />
        </View>
      </SafeAreaView>
    </PersistQueryClientProvider>

  );
}

const ReqButton = () => {
  const mutation = useMutation({ mutationKey: ["addTodo"] });

  return (
    <>
      <Button
        title={"Request"}
        onPress={() => mutation.mutate({ page: "a" })}
      />
      <Button title={'Resume'} onPress={() => queryClient.resumePausedMutations()}/>
      <Button title={'clear'} onPress={() => queryClient.getMutationCache().clear()}/>
    </>
  );
};

export default App;