import React, { useEffect, useState } from 'react';
import { query, collection, onSnapshot, getDocs } from 'firebase/firestore';
import * as _ from 'lodash';
import Dropdown from 'react-dropdown';
import 'react-dropdown/style.css';
import moment from 'moment';
import Select from 'react-select';

import DeviceGraph from "./DeviceGraph";
import db from '../firebase';
import './Devices.css';
import TestAnalyticsGraph from './TestAnalyticsGraph';

const styles = {
    menuList: (base) => ({
        ...base,

        "::-webkit-scrollbar": {
            width: "4px",
            height: "0px",
        },
        "::-webkit-scrollbar-track": {
            background: "#f1f1f1"
        },
        "::-webkit-scrollbar-thumb": {
            background: "#888"
        },
        "::-webkit-scrollbar-thumb:hover": {
            background: "#555"
        }
    })
};

const TestAnalytics = () => {
    const [device, setDevice] = useState("Select a device");
    const [testDate, setTestDate] = useState("Select a test date");
    const [curTest, setCurTest] = useState("Select a test");
    const [curTestData, setCurTestData] = useState(null);
    const [devices, setDevices] = useState([]);
    const [days, setDays] = useState([]);
    const [tests, setTests] = useState([]);
    const [allTests, setAllTests] = useState(null);
    const [showGraph, setShowGraph] = useState(false);
    const [dailyResults, setDailyResults] = useState(null);

    const changeDevice = ({ value }) => {
        console.log(value);
        // console.log(event);

        setDevice(value);
        setDays([...new Set(allTests
            .filter((x) => {
                if (x.deviceSerialNumber === value) return x;
            })
            .map(x => moment(x.testTime).format("YYYY-MM-DD")))]
            .sort()
            .reverse());
    }

    const changeTestDate = ({ value }) => {
        setTestDate(value);
        setCurTest(null);
        setCurTestData(null);
        setShowGraph(false);
        setTests(allTests
            .filter((x) => {
                if (x.deviceSerialNumber === device && moment(x.testTime).isBetween(moment(value).startOf('day'), moment(value).endOf('day'))) return x;
            })
            .map(x => x._id)
            .sort());
    }

    const changeTest = ({ value }) => {
        setCurTestData(null); setShowGraph(false);
        setCurTest(value);
    }

    const showTestGraph = () => {
        if (!curTest) alert('Select a test');
        setCurTestData(allTests.find(x => x._id === curTest));
        setShowGraph(true);
    }

    const toggleShowGraph = () => {
        if (!curTestData) {
            showTestGraph();
        } else {
            setCurTest(null); setCurTestData(null);
        }
    }

    useEffect(() => {
        if (!allTests) {
            const q = query(collection(db, "testData"));

            const unsub = onSnapshot(q, (querySnapshot) => {
                const testDevices = new Set();
                const hposTests = [];
                querySnapshot.forEach((document) => {
                    const hposTestData = document.data();
                    hposTests.push(hposTestData);
                    const { deviceSerialNumber } = hposTestData;
                    testDevices.add(deviceSerialNumber);
                    // console.log(document.data());
                });
                const groups = [...testDevices];
                // console.log(groups);
                setDevices(groups);
                setAllTests(hposTests);

                // let rsult;
                const dailyCounts = hposTests.reduce(function (result, test) {
                    const day = moment(test.testTime).format("YYYY-MM-DD");
                    if (!result[day]) {
                        result[day] = 0;
                    }
                    result[day]++;
                    return result;
                }, {});
                
                setDailyResults(Object.entries(dailyCounts).sort().map(x => {
                    return { date: x[0], count: x[1] };
                }));
                const rss = _.groupBy(hposTests, function (test) {
                    return moment(test.testTime).startOf('day').format();
                });
                // setDailyResults(rss);
            });

            return () => unsub;
        }
    }, [curTestData, curTest, device, testDate]);

    return (
        <div className="devices-page">
            <div className='title'>Analytics</div>
            {/* <div className='dropdown-group'>
                <Dropdown className='device-dropdown' options={devices} onChange={changeDevice} value={device} placeholder="Select an device" />
                <Dropdown className='day-dropdown' options={days} onChange={changeTestDate} value={testDate} placeholder="Select an test date" />
                <Dropdown className='test-dropdown' options={tests} onChange={changeTest} value={curTest} placeholder="Select an test" />

                <button className='clear-button' onClick={toggleShowGraph}><img className="graph-icon" src={require('./graph_icon.png')}></img>{curTestData ? 'Clear' : 'Show'}</button>
            </div> */}

            {dailyResults && <TestAnalyticsGraph data={dailyResults} />}
        </div>
    )
}

export default TestAnalytics;