var request = require("request");

var pfad    = "WIFFI" + ".";
var url     = 'http://192.168.138.57/?json:';



// TODO:
//


function timeLastData() {
   return formatDate(new Date(), "DD.MM, hh:mm:ss");
}

function parseJson(text) {
   if (text === "") return {};
   try {
       json = JSON.parse(text);
   } catch (ex) {
       json = {};
   }
   if(!json) json = {};
   return json;
}

function readJson(url, callback) {
   request(url, function (err, state, body){
       if (body) {
           var json = parseJson(body);
           callback(null, json);
       } else {
           var error = "(" + err + ") ERROR bei Abfrage von: " + url;
           log(error, "warn");  
           callback(error, null);
       }
   });
}



function readVars() {
   readJson(url, function(err,json) {
       if(!err) {
           var myJson = json;
           var dPname, init;
           var anzahlVars = myJson.vars.length;
           for (var i = 1; i < anzahlVars; i++) {
               if(myJson.vars[i].homematic_name) {
              dPname = pfad + myJson.vars[i].homematic_name;
              init = myJson.vars[i].value;
              setState(dPname, init,true);
           }
           }
           for (var systeminfo in myJson.Systeminfo) {
               dPname = pfad + "Systeminfo." + systeminfo;
               init = myJson.Systeminfo[systeminfo];
               setState(dPname, init ,true);
           }
           setState(pfad + "LetzteAbfrage",timeLastData(),true);
           var statusNe = getState(pfad + "Last_State_Count").val;
           if (statusNe < 0) {
               setState(pfad + "Last_State_Count",0,true);
           } else {
               setState(pfad + "Last_State_Count",statusNe + 1,true);
           }
           log("WIFFI Daten aktualisiert: " + url,"debug");
       } else {
           log("Fehler beim Auslesen des JSON. Keine Daten erhalten.","warn");
           if (statusNe > 0) {
               setState(pfad + "Last_State_Count",0,true);
           } else {
               setState(pfad + "Last_State_Count",statusNe - 1,true);
           }
       }
   });
}


function createDpFromJson(myJson) {
   var dPname = "";
   var name = "";
   var forceCreation = false;
   var common;
   var init;
   var type, desc, unit;
   var anzahlVars = myJson.vars.length;
   for (var i = 1; i < anzahlVars; i++) {
       dPname = pfad + myJson.vars[i].homematic_name;
       init = myJson.vars[i].value;
       type = myJson.vars[i].type;
       desc = myJson.vars[i].desc;
       name = desc;
       unit = myJson.vars[i].unit.replace('grad','°');
       common = '{"desc":"' + desc + '","type":"' + type + '","unit":"' + unit + '","role":"value"' +',"name":"' + name + '"}'; 
       common = JSON.parse(common);
       //createState(dPname, init , forceCreation, common);
       if(myJson.vars[i].homematic_name) createState(dPname, init , forceCreation, common);
       //createState(dPname, init);
       log("neuer Datenpunkt: " + dPname + ": " + init +", common: " + common,"info");
   }
   for (var systeminfo in myJson.Systeminfo) {
       dPname = pfad + "Systeminfo." + systeminfo;
       init = myJson.Systeminfo[systeminfo];
       common = '{"name":"'+systeminfo+'","desc":"'+systeminfo+'","role":"value"}';
       common = JSON.parse(common);
       log("neuer Datenpunkt: " + dPname + ": " + init +", common: " + common,"info");
       createState(dPname, init , forceCreation, common);
   }
   createState(pfad + "System.Modultyp",myJson.modultyp);
   createState(pfad + "System.url",url.replace("json:","xpert:0:"));
   createState(pfad + "Last_State_Count",0,true);
   createState(pfad + "LetzteAbfrage"  ,timeLastData());
   createState(pfad + "Skriptstart"    ,timeLastData()),true;
   createState(pfad + "Control_GetData",false,true,        {"name":"Daten mit true manuell abrufen","type":"boolean","role":"value"});
}



function createDp() {
   readJson(url, function (err,json) {
       if(!err) {
           var myJson = json;
           createDpFromJson(myJson);
           log("WIFFI Datenpunkte angelegt/aktualisiert");
       } else {
           log("Fehler beim Auslesen des JSON. Keine Daten erhalten.","error");
           log("Keine Datenpunkte angelegt. Skript beendet","error");
           return;
       }
   });
}

function createOn() {
   var dpId = "javascript." + instance + "." + pfad + "Control_GetData"; 
   on({id: dpId ,change:'any'}, function (obj) {
       log(obj.state.val,"warn");
       if(obj.state.val) {
           readVars();
       }
   });

   schedule("*/4 * * * *", function () { // alle 4 Minute die Werte abfragen
       readVars();
   });

}


function main() {
   readVars();
}


// Skriptstart

createDp();
setTimeout(createOn,    3000);
setTimeout(main,        3000);