import React, { Component } from "react";
import Chart from "react-apexcharts";
import Form from "react-bootstrap/Form";
import Table from "react-bootstrap/Table"
import Button from "react-bootstrap/Button";
import ButtonGroup from "react-bootstrap/ButtonGroup";
import LAMpoints from "./LAMpoints";
import serverURL from "./Url"

var year = "";
var interval;
var VehicleNumberDataObjectForMultipleDay={};
var AvgSpeedDataObjectForMultipleDay={};

export class MultipleDayGraph extends Component {
  constructor(props) {
    super(props);

    this.state = {
      options: {},
      series: [],

      options2: {},
      series2: [],

      info:{},
      year: "",
      month:"",
      day:"",
      endDay:"",
      areaID: "",
      lamID: "",
      startDayNumber: "",
      endDayNumber: "",
      vehicleClass: '8',//8 means all classes
      trafficDirection : 'both',

      counter : 0,
      childReady : false,
      error: "",
      message:"",
      toggleDisabled:true,
      btnDisabled : false,
      toggleHide : true,
      
    };
    this.yearHandler = this.yearHandler.bind(this);
    this.startDayNumberHandler = this.startDayNumberHandler.bind(this);
    this.vehicleClassHandler = this.vehicleClassHandler.bind(this);
    this.trafficDirectionHandler = this.trafficDirectionHandler.bind(this);
  }


    async getDataAsStream() {  
        console.log("sending req!")

        var year_ = this.state.year;
        var areaID = this.state.areaID;
        var lamID = this.state.lamID;
        var startDayNumber_ = this.state.startDayNumber;
        var endDayNumber_ = this.state.endDayNumber;
        
        var escapedDays = 0;
        interval = endDayNumber_ - startDayNumber_
        var counter= 0;
        //console.log({interval})
        var url = `${serverURL}/api/vehicle/?year=${year_}&areaID=${areaID}&lamID=${lamID}&startDayNumber=${startDayNumber_}&endDayNumber=${endDayNumber_}`;//&vehicleClass=${vehicleClass}
        //var url = `http://localhost:3030/api/vehicle/?year=2019&areaID=01&lamID=101&startDayNumber=5&endDayNumber=30`;//&vehicleClass=${vehicleClass}

        try {
            // Step 1: start the fetch and obtain a reader
            var response = await fetch(url);
            
            if(response.status === 200){
                const reader = response.body.getReader();

                // Step 2: get total length
                //const contentLength = +response.headers.get('Content-Length');
    
                // Step 3: read the data
                var resultList = [];
                //let receivedLength = 0; // received that many bytes at the moment
                //let chunks = []; // array of received binary chunks (comprises the body)
                while(true) {
                
                    const {done, value} = await reader.read();
    
                    if (done) {
                        break;
                    }
                    
                    //chunks.push(value);
                    //receivedLength += value.length;
    
                    //console.log(`Received ${receivedLength} of ${contentLength}`)
                    try {
                        let result_ = new TextDecoder("utf-8").decode(value);
                        var result = JSON.parse(result_)
                        resultList.push(resultList);
                         //console.log(result)
    
                        //getting the vehicle number in each our based on vehicle class from response of the request  
                        var vehicle_number = result.vehicle_number;
                        
                        //filling the missing values of vehicle number to zero
                        let final_Vehicle_number = this.fillMissingValues(vehicle_number);
                        let vehicleNumber  = this.filterData(final_Vehicle_number);
                        
                        //getting the cars average speed  based on car category
                        var avg_speed = result.avg_speed_km_h;
                        //filling the missing values of average speed to zero
                        let final_avg_speed = this.fillMissingValues(avg_speed);
                        //filtering the data and making it as a nested object
                        let avgSpeed_ = this.filterData(final_avg_speed);
                        //using the calculateAvgSpeed function it will claculate the avarage speed for each vehicle class
                        let avgSpeed = this.calculateAvgSpeed(avgSpeed_) 
        
                        let date = (Object.keys(avgSpeed))[0]
        
                        //saving all days in one object
                        VehicleNumberDataObjectForMultipleDay[date]= vehicleNumber[date]
                        AvgSpeedDataObjectForMultipleDay[date]= avgSpeed[date]
        
                        //using setDataForGraph function to set the filtered and sorted data as graph's data set
                        this.setDataForGraph(VehicleNumberDataObjectForMultipleDay,AvgSpeedDataObjectForMultipleDay);
                        counter++;
                        this.setState({counter })
                        //console.log({vehicleNumber,avgSpeed});

                    } catch (error) {
                        console.log("escaped one day!")
                        escapedDays++;
                        continue
                    }
                    
    
                   
                }
    
                console.log("all days; ",VehicleNumberDataObjectForMultipleDay)
                this.setState({toggleDisabled: false,btnDisabled:false, toggleHide : false, message : `Faulty days: ${escapedDays}`}); 
            }
            else {
                this.setState({btnDisabled:false, message :"" });
                let errormsg="";
                if(response.status === 404){
                errormsg = "No data found for the selected date! Error code "+response.status;
                }
                else errormsg = "Oops something went wrong! Error code "+ response.status;
        
                this.setState({error: errormsg})
                //alert("Could not connect to server! no data found for selected date and location! code:",response.status)
            }
            
        }
        catch(er){
            this.setState({btnDisabled:false, message :"" });
            console.log(er);
            let errormsg="";
            if(response.status === 404){
              errormsg = "No data found for the selected date! Error code "+response.status;
            }
            else errormsg = "Oops something went wrong! Error code "+ response.status;
    
            this.setState({error: errormsg})

        }
        
    }  


    calculateAvgSpeed(input){
        //getting the avarage speed of all cars in each hour and saving them i class '8'
        Object.keys(input).forEach(hour =>{
            let direction1 = [];
            let direction2 = [];
            let Vclasses = input[hour];
            Object.keys(Vclasses).forEach(vclass=>{
                            
                if(vclass==='8'){
                    const arrSum = arr => arr.reduce((a,b) => a + b, 0);
                    input[hour]['8']['1'] = ((arrSum(direction1))/direction1.length);
                    input[hour]['8']['2'] = ((arrSum(direction2))/direction2.length);
                    
                    let both = direction1.concat(direction2)
                    input[hour]['8']['both'] = Math.round(((arrSum(both))/both.length) * 10) / 10;
                }else{
                    if(input[hour][vclass]['1'] !==0){
                        
                        direction1.push(input[hour][vclass]['1'])
                    }
                    if(input[hour][vclass]['2'] !==0){
                        
                        direction2.push(input[hour][vclass]['2'])
                    }
                    let avg = 
                    (input[hour][vclass]['1']+
                    input[hour][vclass]['2'])/2;

                    input[hour][vclass]['both'] = Math.round(avg * 10) / 10
                }
            });
        });
        return input;
    }


    setDataForGraph = (Vnumber,Vspeed)=>{

    var VCLASS = this.state.vehicleClass;
    var dates=[];
    var numberData = [];
    var speedData =  [];
    //data for graph
    var trafficDirection = this.state.trafficDirection;

    Object.keys(Vnumber).forEach(key=>{
        dates.push(key);
        numberData.push(Vnumber[key][VCLASS][trafficDirection]);
    });
    Object.keys(Vspeed).forEach(key=>{
        speedData.push(Vspeed[key][VCLASS][trafficDirection]);
    });

    //Setting the fetched data as graph's input data
    this.setState({
            //Data for vehcile number graph
            options:{
                chart: {
                    id: "basic-bar"
                },
                dataLabels: {
                    enabled: false
                },
                xaxis: {
                    categories: dates,
                    title:{
                        text : "Date"
                    }
                },
                yaxis: {
                title: {
                    text: 'Vehicle Number'
                }   
                },
                

                title: {
                text: 'Number of vehicles in each day',
                align: 'center'
                },
                legend: {
                position: 'top',
                horizontalAlign: 'right',
                floating: true,
                offsetY: -25,
                offsetX: -5
                }
                
            },
            series:[{
                name: "Vehicle Number",
                data: numberData
            }],
            //data for avarage speed garaph
            options2:{
                chart: {
                    id: "basic-bar"
                },
                dataLabels: {
                enabled: false
                },
                xaxis: {
                    categories: dates,
                    title:{
                    text : "Date"
                    }
                },
                yaxis: {
                    title: {
                        text: 'Avrage speed km/h'
                    },
                    labels: {
                        formatter: function (value) {
                            return Math.round(value * 10)/10;
                        }
                    }
                
                },
                colors: ['#cc3b31'],

                title: {
                text: 'Avrage Speed in each day',
                align: 'center'
                },
                legend: {
                position: 'top',
                horizontalAlign: 'right',
                floating: true,
                offsetY: -25,
                offsetX: -5
                }
            },
            series2:[{
                name: "Avarage Speed km/h",
                data: speedData
            }],
            
        });
    }

    filterData= (input)=>{
    var DataObj = {};
    let d = {};
    let c = {};

    let sum =0;
    Object.keys(input).forEach((key)=>{
        let value = input[key];
        let keyToList = key.toString().split('_');
        
        let dates = keyToList[0];
        let category =  parseFloat(keyToList[1]);
        let direction = parseFloat(keyToList[2]); 

        c[direction] = Math.round(value * 10) / 10;

        sum = c['1']+c['2'];
        c['both'] = sum;
        d[category] = {...c};
        
        //checking if all the classes 1-7 exists, and then creates class 8 which is total of all classes
        if(d['1'] && d['2'] && d['3'] && d['4'] && d['5'] && d['6'] && d['7']){
        d['8'] = {1:0, 2:0, both:0};
        d['8']['1'] = d['1']['1'] + d['2']['1']+d['3']['1']+d['4']['1']+d['5']['1']+d['6']['1']+d['7']['1'];
        d['8']['2'] = d['1']['2'] + d['2']['2']+d['3']['2']+d['4']['2']+d['5']['2']+d['6']['2']+d['7']['2'];
        d['8']['both'] = d['8']['1'] + d['8']['2'];

        }
        DataObj[dates] = {...d};
        //if()
        
    });
    return DataObj;           
    }

    //function for filling the missing values like vehicle category and its number
    fillMissingValues=(input)=>{
        let firstkey = Object.keys(input)
        let year = firstkey[0].split('_')[0]

        let final = {};
        for (let i = 0; i <= 14; i++) {
        for (let j = 1; j <= 7; j++) {
            for(let x=1; x<=2;x++){
                const key = [`${year}_${j}_${x}`];
                final[key] = input[key];
                if (input[key] === undefined) {
                final[key] = 0;
                }
            }
            
        }
        }
        return final;
    }


    dateTodaynumber = (year, month,day) => {
        var x = new Date(year, 0, 0);
        x = x.getTime();

    
        var d = new Date(year, month, day);
        d = d.getTime();
        var sec = d - x;
        var secToDay = sec / 1000 / 60 / 60 / 24;
        secToDay = Math.floor(secToDay);
        return secToDay;
    }

    yearHandler(e) {
        year = e;
        this.setState({ year });
    }

    monthHandler=(e)=>{
        this.setState({month : e});
    }

    startDayNumberHandler(e) {
        this.setState({day: e});
    }
    endDaynumberHandler = (e)=>{
        console.log(e)
        this.setState({endDay:e})
    }
    
    vehicleClassHandler(e) {
        var vehicleClass = e.target.value;
        this.setState({ vehicleClass },()=>{
            //one day data
            //using setDataForGraph function to set the filtered and sorted data as graph's data set
            this.setDataForGraph(VehicleNumberDataObjectForMultipleDay,AvgSpeedDataObjectForMultipleDay);
        
        });
    }

    trafficDirectionHandler(e){
        var btnID = e.target.id;
        
        let trafficDirection;
        if(btnID ==="direction1"){
            //console.log(btnID)
        trafficDirection=1;
        }else if(btnID ==="direction2"){
            //console.log(btnID)
        trafficDirection=2;
        }else if(btnID === "bothDirection"){
            //console.log(btnID)
            trafficDirection='both';
        } 
        this.setState({trafficDirection},()=>{
            //one day data
            //using setDataForGraph function to set the filtered and sorted data as graph's data set
            this.setDataForGraph(VehicleNumberDataObjectForMultipleDay,AvgSpeedDataObjectForMultipleDay);
        });
    }

    infoHandler = (info)=>{
        var lamID = info.id;
        this.setState({ lamID,info});
    }
    areaHandler = (id)=>{
        var areaID = id;
        this.setState({ areaID});
    }

    isChildreadyHandler = (e)=>{
        this.setState({
        childReady : e
        })
    }
    

    buttonHandler = () => {
        let selectedYear = this.state.year;
        let selectedMonth = this.state.month;
        let selectedDay = this.state.day;
        let selectedEndDay = this.state.endDay;

        let startDayNumber = this.dateTodaynumber(selectedYear,selectedMonth,selectedDay);
        let endDayNumber = this.dateTodaynumber(selectedYear,selectedMonth,selectedEndDay)
        
        var inputs = [
        this.state.year,
        this.state.areaID,
        this.state.lamID,
        this.state.month,
        this.state.day,
        this.state.endDay,
        this.state.childReady
        
        ];
        if (
        (inputs[0] === "") |
        (inputs[1] === "") |
        (inputs[2] === "") |
        (inputs[3] === "") |
        (inputs[4] === "") | 
        (inputs[5] === "") | 
        (inputs[6] === false)
        ) {

            this.setState({error:
                "Please make sure that you have chosen right value for dates, Area and LAM point ID fields!",
            });

        } 
        else if( startDayNumber === endDayNumber | startDayNumber > endDayNumber){
            this.setState({error:
                "End day can not be equal or smaller then the start day!",
            });
        }
        
        else {
            this.setState({
                error : "",
                message : "Please wait while the data is beeing processed!",
                btnDisabled : true
            })
            this.setState({startDayNumber,endDayNumber},()=>{
                this.getDataAsStream();
                console.log("Sending request to server!")
            });
            
        //console.log(this.state)
        }
    }

    

    render() {
        let id,name, coordinates,status,address,municipality,province,direction1,direction2,startTime='';
        if (this.state.info['id'] !== undefined){
        id = this.state.info.id;
        status = this.state.info.status;
        name = this.state.info.name;
        coordinates = this.state.info.coordinatesETRS89.toString();
        address = this.state.info.address.en;
        municipality = this.state.info.municipality;
        province = this.state.info.province;
        startTime = this.state.info.startTime;
        direction1 = this.state.info.direction1;
        direction2 = this.state.info.direction2;
        }
        

        return (

        <div className="oneDayGraphComponent">

        <div className="grid-container">
            <div className="grid-item-heading">
                Data analysis for multiple day
            </div>

            <div className="grid-item-form">
                <div style={{fontSize : 16, color : '#eb4034'}}>{this.state.error}</div>

                <LAMpoints 
                    info={this.infoHandler} 
                    SelectedAreaID = {this.areaHandler} 
                    selectedYear={this.yearHandler} 
                    selectedMonth={this.monthHandler} 
                    selectedDay={this.startDayNumberHandler} 
                    selectedEndDay= {this.endDaynumberHandler}
                    ready = {this.isChildreadyHandler} 
                    endDayDisabled = {false}
            
                />

                <Button
                type="button"
                className="my-1 mr-sm-2"
                id="drawGraph"
                onClick={this.buttonHandler}
                disabled={this.state.btnDisabled}
                block
                >
                {this.state.btnDisabled ? 'Loading ...' : 'Draw Graph'}
                </Button>

            
                <div style={{fontSize : 16, color : '#1878b5'}}>
                    {this.state.message}

                    <div hidden={!this.state.btnDisabled}>
                    
                         Loading {this.state.counter} of {interval+1} 

                    </div>
                    
                </div>
                

                <div className="grid-item-info">
                <h5>TMS Information:</h5>
                <Table striped size="sm" style={{fontSize:'16px', color:"#0077c7"}}>
                    
                    <tbody>
                    <tr>
                        <td> TMS ID: </td>
                        <td>{id}</td>
                        
                    </tr>
                    <tr>
                        <td>Name: </td>
                        <td>{name}</td>
                        
                    </tr>
                    <tr>
                        <td>Status: </td>
                        <td>{status}</td>
                    
                    </tr>

                    <tr>
                        <td> Coordinates: </td>
                        <td>{coordinates}</td>
                    </tr>

                    <tr>
                        <td>Address: </td>
                        <td>{address}</td>
                    </tr>

                    <tr>
                        <td>Municipality: </td>
                        <td>{municipality}</td>
                    </tr>
                    <tr>
                        <td>Province: </td>
                        <td>{province}</td>
                    </tr>
                    <tr>
                        <td>Start Time: </td>
                        <td>{startTime}</td>
                    </tr>
                    <tr>
                        <td>Direction 1: </td>
                        <td>{direction1}</td>
                    </tr>
                    <tr>
                        <td>Direction 2: </td>
                        <td>{direction2}</td>
                    </tr>
                    </tbody>
                </Table>
                </div>
                
            </div>

            <div className="grid-item-filter">
            
            
            <Form style= {{width : "100%"}}> 
                <Form.Label
                className="my-1 mr-2"
                htmlFor="inlineFormCustomSelectPref"
                >
                <h5>Filters:</h5>
                </Form.Label><br></br>


                <Form.Label
                className="my-1 mr-2"
                htmlFor="inlineFormCustomSelectPref"
                >
                vehicle Category
                </Form.Label>
                <Form.Control
                as="select"
                className="my-1 mr-sm-2"
                id="vehicleClass"
                custom
                onChange={this.vehicleClassHandler} 
                disabled={this.state.toggleDisabled}
                >
                <option value="8">All</option>
                <option value="1">1 HA-PA (henkilö- tai pakettiauto)</option>
                <option value="2">2 KAIP (kuorma-auto ilman perävaunua)</option>
                <option value="3">3 Linja-autot</option>
                <option value="4">4 KAPP (kuorma-auto ja puoliperävaunu)</option>
                <option value="5">5 KATP (kuorma-auto ja täysperävaunu)</option>
                <option value="6">6 HA + PK (henkilöauto ja peräkärry)</option>
                <option value="7">7 HA + AV (henkilöauto ja asuntovaunu)</option>
                </Form.Control>

                <ButtonGroup size="sm" className="mb-2 " style={{width :"100%"}} hidden={this.state.toggleHide}>
                    <Button 
                        type="button"
                        className="my-4"
                        id="direction1"
                        onClick={this.trafficDirectionHandler}
                    >Direction 1</Button>

                    <Button 
                        type="button"
                        className="my-4"
                        id="direction2"
                        onClick={this.trafficDirectionHandler}
                    >Direction 2</Button>

                    <Button 
                        style={{minWidth : 120 }}
                        type="button"
                        className="my-4"
                        id="bothDirection"
                        onClick={this.trafficDirectionHandler}
                    >Both Direction</Button>
                </ButtonGroup>
            </Form>
            </div>

            <div className="grid-item-graph1">
                <div className="grid-item-graph-child"> 
                <Chart
                options={this.state.options}
                series={this.state.series}
                type="bar"
                width="500"
                />
                </div>
            
            </div>
            
            <div className="grid-item-graph2">
                <div className="grid-item-graph-child"> 
                <Chart
                options={this.state.options2}
                series={this.state.series2}
                type="bar"
                width="500"
                />
                </div>
            </div>  
        </div>
        
        </div>
        );
    }
}

export default MultipleDayGraph;