//* comment *//

Copyright (C) 2015 Walter Bender

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

DEVSERVER: 'https://192.168.2.177:8092/impact/_design/dev_impact_getrows/_view/Get_All_Docs'

DEVSERVER: 'https://192.168.2.177:54692/ProxyHandler.ashx'

//* globals *//
var impactLastFetchTime = 0;
var impactUID = '';
var impactHoursAgo = 0;
var impactData = null;

//* block:fetchdata *//
var fetchBlk = new ProtoBlock('fetch');
fetchBlk.palette = palettes.dict['cloud'];
blocks.protoBlockDict['fetch'] = fetchBlk;
fetchBlk.staticLabels.push(_('fetch'), _('UID'), _('field'), _('hours ago'));
fetchBlk.adjustWidthToLabel();
fetchBlk.threeArgMathBlock();
fetchBlk.dockTypes[1] = 'anyin';
fetchBlk.dockTypes[2] = 'anyin';
fetchBlk.dockTypes[3] = 'numberin';
fetchBlk.defaults.push("UID");
fetchBlk.defaults.push("temp");
fetchBlk.defaults.push(0);

//* arg:fetch *//
var block = logo.blocks.blockList[blk];
var conns = block.connections;
var field = logo.parseArg(logo, turtle, conns[2]);
var uid = logo.parseArg(logo, turtle, conns[1]);
var hoursAgo = logo.parseArg(logo, turtle, conns[3]);

var d = new Date();
var now = d.getTime() / 1000;
var deltaSeconds = now - impactLastFetchTime;
var haveData = false;
if (deltaSeconds > 3600 || uid != impactUID) {
    var apiURL = 'https://sensor-station.appspot.com/sensor_station';
    console.log('using server data');
    try {
        var request = new XMLHttpRequest();
        request.open('GET', apiURL, false);
        request.send(null);
        var response = request.responseText;
        console.log(response);
    } catch (e) {
        logo.errorMsg(_('Impact data not available.'), blk);
    }
    try {
        impactData = JSON.parse(response);
        haveData = true;
    } catch (e) {
        logo.errorMsg(_('Cannot parse Impact data.'), blk);
    }
} else {
    haveData = true;
    console.log('using cached data');
}

var output = 0;
if (haveData) {
    impactLastFetchTime = now;
    impactUID = uid;
    var foundUID = false;
    var foundTime = false;
    if (hoursAgo < 0) {
        var minTime = 0;
        var maxTime = now;
    } else {
        var minTime = now - hoursAgo * 3600 - 1800;
        var maxTime = now - hoursAgo * 3600 + 1800;
    }
    try {
        for (var i = impactData.length - 1; i > -1; i--) {
            if ('uid' in impactData[i] && impactData[i]['uid'] == uid) {
                foundUID = true;
                if ('tstamp' in impactData[i]) {
                    var tstamp = impactData[i]['tstamp'] / 1000;
  		    if (tstamp > minTime && tstamp < maxTime) {
                        foundTime = true;
                        if (field in impactData[i]) {
                            output = impactData[i][field];
                        } else {
                            logo.errorMsg(_('Impact field not found.'), blk);
                        }
                        break;
                    }
                }
            } else if ('id' in impactData[i] && impactData[i]['id'] == uid) {
                foundUID = true;
                if ('tstamp' in impactData[i]) {
                    var tstamp = impactData[i]['tstamp'] / 1000;
  		    if (tstamp > minTime && tstamp < maxTime) {
                        foundTime = true;
                        if (field in impactData[i]) {
                            output = impactData[i][field];
                        } else {
                            logo.errorMsg(_('Impact field not found.'), blk);
                        }
                        break;
                    }
                }
            }
         }
         if (!foundUID) {
            logo.errorMsg(_('Impact UID not found.'), blk);
         } else if (!foundTime) {
            logo.errorMsg(_('Impact Time not found.'), blk);
         }
    } catch (e) {
        logo.errorMsg(_('Impact data not available.'), blk);
    }
}
block.value = Number(output);

//* palette-fill:cloud *// #ff0066
//* palette-stroke:cloud *// #ef003e
//* palette-highlight:cloud *// #ffb1b3
//* palette-stroke-highlight:cloud *// #000000

//* palette-icon:cloud *//
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