//defaults
var default_granularity = '5m'; // needs to be specified as string, changes
var default_hours = 24;         // int is OK, (h) hardcoded
var default_end = 0;            // detto
var network_type='wlan0'        // honestly, these two should be generated
var iot_type='Tea'              // dynamically
var base_url = "https://bastart.spoton.cz/data/";
var counter = 0;
var tout = 5000;                // fresh date refresh rate, in ms
var g_tout = 30000;             // graph update rate, in ms

//initialize the uninitialized
var hours = new Object();
var granularity = new Object();
var end = new Object();
var graphdata = new Object();
var data = new Object();

// types match function names in python's Dynamic.py class
var types = Array('solcap_monitor',
    'cpumem_monitor',
    'network_monitor',
    'esp_battery_monitor');

// Now let's set up the defaults and primary data sources, leter changed dynamically
var types_size = types.length;
for(var i=0; i<types_size; i++){
    var type = types[i];
    hours[type] = default_hours;
    granularity[type] = default_granularity;
    end[type] = default_end;
    if(type == 'cpumem_monitor'){
        hours[type] = 3;
        granularity[type] = '1m';
    }
    data[type] = base_url + type + "?range=" + hours[type] + "h&granularity=" + granularity[type] + "&end=" + default_end + "h";
    if(type == 'network_monitor'){
        hours[type] = 3;
        granularity[type] = '1m';
        data[type] = base_url + type + "?range=" + hours[type] + "h&granularity=" + granularity[type] + "&end=" + default_end + "h&type=" + network_type;
    }
    if(type == 'esp_battery_monitor'){
        hours[type] = 168;
        granularity[type] = '1h';
        data[type] = base_url + type + "?range=" + hours[type] + "h&granularity=" + granularity[type] + "&end=" + default_end + "h&type=" + iot_type;
    }
}

solcap = new Dygraph(
// containing div
document.getElementById("solcap"),
// CSV or path to a CSV file.
data["solcap_monitor"]
,{
    //labels: ['time','Solar','Capacitor'],
    axes : {
            x : {
                drawGrid: true,
                drawAxis : true
            },
            y : {
                drawGrid: false,
                drawAxis : true,
                valueRange: [0,4.6]
            },
            y2 : {
                drawGrid: false,
                drawAxis: true,
                valueRange: [0,8.6],
                independentTicks: true
            }
    },
    rollPeriod: 5,
    interactionModel: {},
    connectSeparatedPoints: true,
    series:{
        'Solar': {
            axis: 'y',
            color: '#999',
            fillGraph: true,
            fillAlpha: 0.4
        },
        'Capacitor': {
            axis: 'y2',
            color: '#c11'
        }

    },
        ylabel: '<span style="color:#999;">Solar Irradiance</span>',
        y2label: '<span style="color:#c11;">Capacitor [V]</span>',
        labelsDiv: 'solcap_labels',
        legend: 'always'
    }
);


cpumem = new Dygraph(
document.getElementById("cpumem"),
data['cpumem_monitor']
,{
    axes : {
            x : {
                drawGrid: true,
                drawAxis : true
            },
            y : {
                drawGrid: false,
                drawAxis : true,
                valueRange: [0,100]
            },
            y2 : {
                drawGrid: false,
                drawAxis: true,
                valueRange: [0,100],
                independentTicks: true
            }
    },
    rollPeriod: 5,
    interactionModel: {},
    connectSeparatedPoints: true,
    series:{
        'Cpu': {
            axis: 'y',
            color: '#999',
            fillGraph: true,
            fillAlpha: 0.4
        },
        'Mem': {
            axis: 'y2',
            color: '#c11'
        },
        'Disk': {
            axis: 'y2',
            color: '#111'
        }

    },
        ylabel: '<span style="color:#999;">CPU [%]</span>',
        y2label: '<span style="color:#c11;">MEM</span> / <span style="color:#111;">DISK [%]</span>',
        labelsDiv: 'cpumem_labels',
        legend: 'always'
    }
);

network = new Dygraph(
document.getElementById("network"),
data['network_monitor']
,{
    axes : {
            x : {
                drawGrid: true,
                drawAxis : true
            },
            y : {
                drawGrid: false,
                drawAxis : true,
            },
            y2 : {
                drawGrid: false,
                drawAxis: true,
                independentTicks: true
            }
    },
    rollPeriod: 2,
    interactionModel: {},
    connectSeparatedPoints: true,
    series:{
        'Bin': {
            axis: 'y',
            color: '#000',
            fillGraph: true,
            fillAlpha: 0.1
        },
        'Bout': {
            axis: 'y',
            color: '#aaa',
            fillGraph: true,
            fillAlpha: 0.5
        },
        'Din': {
            axis: 'y2',
            color: '#ff5500'
        },
        'Dout': {
            axis: 'y2',
            color: '#ff5500'
        },
        'Ein': {
            axis: 'y2',
            color: '#ff2233',
            fillAlpha: 0.5
        },
        'Eout': {
            axis: 'y2',
            color: '#ff2233',
            fillAlpha: 0.5
        }

    },
        ylabel: '<span style="color:#000;">kB/s</span>',
        y2label: '<span style="color:#ff2233;">Drop / Error</span>',
        labelsDiv: 'network_labels',
        legend: 'always'
    }
);

esp_battery = new Dygraph(
document.getElementById("esp_battery"),
data['esp_battery_monitor']
,{
    axes : {
            x : {
                drawGrid: true,
                drawAxis : true
            },
            y : {
                drawGrid: false,
                drawAxis : true,
                valueRange: [2.5,4.5]
            },
            y2 : {
                drawGrid: false,
                drawAxis: true,
                valueRange: [2.5,4.5],
                independentTicks: true
            }
    },
    rollPeriod: 5,
    interactionModel: {},
    connectSeparatedPoints: true,
    series:{
        'batt(Tea)': {
            axis: 'y',
            color: '#000',
            fillGraph: true,
            fillAlpha: 0.2
        },
        'batt_perc(Tea)': {
            axis: 'y2',
            color: '#000'
        },
        'batt_low(Tea)': {
            axis: 'y2',
            color: '#e00'
        }

    },
        ylabel: '<span style="color:#000;">Battery (Tea) [V]</span>',
        y2label: '<span style="color:#000;">Top [V]</span> / <span style="color:#e00;">Low [V]</span>',
        labelsDiv: 'esp_battery_labels',
        legend: 'always'
    }
);

// re-draw graphs
function refreshGraph(source){
  graphdata[source] = "https://bastart.spoton.cz/data/" + source + "?range=" + hours[source] + "h&granularity=" + granularity[source] + "&end=" + end[source] + "h";
  if(source == 'solcap_monitor'){
    solcap.updateOptions({'file': graphdata[source]});
  }
  if(source == 'cpumem_monitor'){
    cpumem.updateOptions({'file': graphdata[source]});
  }
  if(source == 'esp_battery_monitor'){
    graphdata[source] += "&type=" + iot_type;
    esp_battery.updateOptions({'file': graphdata[source]});
  }
  if(source == 'network_monitor'){
    graphdata[source] += "&type=" + network_type;
    network.updateOptions({'file': graphdata[source]});
  }
}

// here, target needs to match the python's dynamic class again
function setHours(hours_to_set, target){
  hours[target] = hours_to_set;
  switch(hours[target]){
      case '1':
        granularity[target] = '20s';
        break;
      case '6':
        granularity[target] = '30s';
        break;
      case '12':
        granularity[target] = '1m';
        break;
      case '24':
        granularity[target] = '2m';
        break;
      case '168':
        granularity[target] = '10m';
        break;
      case '720':
        granularity[target] = '1h';
        break;
      case '4320':
        granularity[target] = '3h';
        break;
      case '8640':
        granularity[target] = '1d';
        break;
      default:
        granularity[target] = '10m';
  }
  end[target] = 0;
  refreshGraph(target);
}

// Functions for buttons to scale / move graphs
function setBack(target){
    disp_range = hours[target]*1 - end[target]*1;
    hours[target] = hours[target]*1 + disp_range;
    end[target] = end[target]*1 + disp_range;
    refreshGraph(target);
}

function setForth(target){
    disp_range = hours[target]*1 - end[target]*1;
    hours[target] = hours[target]*1 - disp_range;
    if(hours[target] < disp_range){
        hours[target] = disp_range;
    }
    end[target] = end[target]*1 - disp_range;
    if(end[target] < 0){
        end[target] = 0;
    }
    refreshGraph(target);
}

function getPageContents(callback,url,params) {
    if (window.XMLHttpRequest){
        // code for IE7+, Firefox, Chrome, Opera, Safari, SeaMonkey
        xmlhttp=new XMLHttpRequest();
    }
    else{
        // code for IE6, IE5
        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    if(params!=null) {
        xmlhttp.open("POST", url, true);
        xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    } else {
        xmlhttp.open("GET", url, true);
    }
    xmlhttp.onreadystatechange = function() {
        if(xmlhttp.readyState == 4 && xmlhttp.status == 200) {
            callback(xmlhttp.responseText);
        }
    }
    xmlhttp.send(params);
}

function refreshValues(){
    fresh_vals_url = '/data/status_realtime_data?type=json'
    getPageContents(function(result){freshVals=JSON.parse(result);},
                     fresh_vals_url)
    document.getElementById('timestamp').innerHTML = freshVals.time;                 
    document.getElementById('sol_val').innerHTML = freshVals.iss_solar;
    document.getElementById('cap_val').innerHTML = freshVals.iss_capacitor;
    document.getElementById('cpu_val').innerHTML = freshVals.RasPI_cpu;
    document.getElementById('mem').innerHTML = freshVals.RasPI_mem;
    document.getElementById('disk').innerHTML = freshVals.RasPI_disk;
    document.getElementById('net_in').innerHTML = freshVals.net.b_in;
    document.getElementById('net_out').innerHTML = freshVals.net.b_out;
    counter = counter + tout;
    if(counter >= g_tout){
        for(var i=0; i<types_size; i++){
            var type = types[i];
            refreshGraph(type);
        }
        document.getElementById('graph_timestamp').innerHTML = freshVals.time;        
        counter = 0;
    }
}
var intervalVal = setInterval(refreshValues, tout);