// MAP DATA RENDER ////////////////////////////////////////////////
// class to handle rendering into leaflet the JSON data from the servers



window.Render = function() {
  this.portalMarkerScale = undefined;
}

// start a render pass. called as we start to make the batch of data requests to the servers
window.Render.prototype.startRenderPass = function(level,bounds) {
  this.isRendering = true;

  this.deletedGuid = {};  // object - represents the set of all deleted game entity GUIDs seen in a render pass

  this.seenPortalsGuid = {};
  this.seenLinksGuid = {};
  this.seenFieldsGuid = {};

  this.bounds = bounds;
  this.level = level;

  // we pad the bounds used for clearing a litle bit, as entities are sometimes returned outside of their specified tile boundaries
  // this will just avoid a few entity removals at start of render when they'll just be added again
  var paddedBounds = bounds.pad(0.1);

  this.clearPortalsOutsideBounds(paddedBounds);

  this.clearLinksOutsideBounds(paddedBounds);
  this.clearFieldsOutsideBounds(paddedBounds);


  this.rescalePortalMarkers();
}

window.Render.prototype.clearPortalsOutsideBounds = function(bounds) {
  var count = 0;
  for (var guid in window.portals) {
    var p = portals[guid];
    // clear portals outside visible bounds - unless it's the selected portal, or it's relevant to artifacts
    if (!bounds.contains(p.getLatLng()) && guid !== selectedPortal && !artifact.isInterestingPortal(guid)) {
      this.deletePortalEntity(guid);
      count++;
    }
  }
  console.log('Render: deleted '+count+' portals by level/bounds');
}

window.Render.prototype.clearLinksOutsideBounds = function(bounds) {
  var count = 0;
  for (var guid in window.links) {
    var l = links[guid];

    // NOTE: our geodesic lines can have lots of intermediate points. the bounds calculation hasn't been optimised for this
    // so can be particularly slow. a simple bounds check based on start+end point will be good enough for this check
    var lls = l.getLatLngs();
    var linkBounds = L.latLngBounds(lls);

    if (!bounds.intersects(linkBounds)) {
      this.deleteLinkEntity(guid);
      count++;
    }
  }
  console.log('Render: deleted '+count+' links by bounds');
}

window.Render.prototype.clearFieldsOutsideBounds = function(bounds) {
  var count = 0;
  for (var guid in window.fields) {
    var f = fields[guid];

    // NOTE: our geodesic polys can have lots of intermediate points. the bounds calculation hasn't been optimised for this
    // so can be particularly slow. a simple bounds check based on corner points will be good enough for this check
    var lls = f.getLatLngs();
    var fieldBounds = L.latLngBounds([lls[0],lls[1]]).extend(lls[2]);

    if (!bounds.intersects(fieldBounds)) {
      this.deleteFieldEntity(guid);
      count++;
    }
  }
  console.log('Render: deleted '+count+' fields by bounds');
}


// process deleted entity list and entity data
window.Render.prototype.processTileData = function(tiledata) {
  this.processDeletedGameEntityGuids(tiledata.deletedGameEntityGuids||[]);
  this.processGameEntities(tiledata.gameEntities||[]);
}


window.Render.prototype.processDeletedGameEntityGuids = function(deleted) {
  for(var i in deleted) {
    var guid = deleted[i];

    if ( !(guid in this.deletedGuid) ) {
      this.deletedGuid[guid] = true;  // flag this guid as having being processed

      if (guid == selectedPortal) {
        // the rare case of the selected portal being deleted. clear the details tab and deselect it
        renderPortalDetails(null);
      }

      this.deleteEntity(guid);

    }
  }

}

window.Render.prototype.processGameEntities = function(entities) {

  // we loop through the entities three times - for fields, links and portals separately
  // this is a reasonably efficient work-around for leafletjs limitations on svg render order


  for (var i in entities) {
    var ent = entities[i];
    if (ent[2][0] == 'r' && !(ent[0] in this.deletedGuid)) {
      this.createFieldEntity(ent);
    }
  }

  for (var i in entities) {
    var ent = entities[i];

    if (ent[2][0] == 'e' && !(ent[0] in this.deletedGuid)) {
      this.createLinkEntity(ent);
    }
  }

  for (var i in entities) {
    var ent = entities[i];

    if (ent[2][0] == 'p' && !(ent[0] in this.deletedGuid)) {
      this.createPortalEntity(ent);
    }
  }
}


// end a render pass. does any cleaning up required, postponed processing of data, etc. called when the render
// is considered complete
window.Render.prototype.endRenderPass = function() {
  var countp=0,countl=0,countf=0;

  // check to see if there are any entities we haven't seen. if so, delete them
  for (var guid in window.portals) {
    // special case for selected portal - it's kept even if not seen
    // artifact (e.g. jarvis shard) portals are also kept - but they're always 'seen'
    if (!(guid in this.seenPortalsGuid) && guid !== selectedPortal) {
      this.deletePortalEntity(guid);
      countp++;
    }
  }
  for (var guid in window.links) {
    if (!(guid in this.seenLinksGuid)) {
      this.deleteLinkEntity(guid);
      countl++;
    }
  }
  for (var guid in window.fields) {
    if (!(guid in this.seenFieldsGuid)) {
      this.deleteFieldEntity(guid);
      countf++;
    }
  }

  console.log('Render: end cleanup: removed '+countp+' portals, '+countl+' links, '+countf+' fields');

  // reorder portals to be after links/fields
  this.bringPortalsToFront();

  this.isRendering = false;

  // re-select the selected portal, to re-render the side-bar. ensures that any data calculated from the map data is up to date
  if (selectedPortal) {
    renderPortalDetails (selectedPortal);
  }
}

window.Render.prototype.bringPortalsToFront = function() {
  for (var lvl in portalsFactionLayers) {
    // portals are stored in separate layers per faction
    // to avoid giving weight to one faction or another, we'll push portals to front based on GUID order
    var lvlPortals = {};
    for (var fac in portalsFactionLayers[lvl]) {
      var layer = portalsFactionLayers[lvl][fac];
      if (layer._map) {
        layer.eachLayer (function(p) {
          lvlPortals[p.options.guid] = p;
        });
      }
    }

    var guids = Object.keys(lvlPortals);
    guids.sort();

    for (var j in guids) {
      var guid = guids[j];
      lvlPortals[guid].bringToFront();
    }
  }

  // artifact portals are always brought to the front, above all others
  $.each(artifact.getInterestingPortals(), function(i,guid) {
    if (portals[guid] && portals[guid]._map) {
      portals[guid].bringToFront();
    }
  });

}


window.Render.prototype.deleteEntity = function(guid) {
  this.deletePortalEntity(guid);
  this.deleteLinkEntity(guid);
  this.deleteFieldEntity(guid);
}

window.Render.prototype.deletePortalEntity = function(guid) {
  if (guid in window.portals) {
    var p = window.portals[guid];
    window.ornaments.removePortal(p);
    this.removePortalFromMapLayer(p);
    delete window.portals[guid];
    window.runHooks('portalRemoved', {portal: p, data: p.options.data });
  }
}

window.Render.prototype.deleteLinkEntity = function(guid) {
  if (guid in window.links) {
    var l = window.links[guid];
    linksFactionLayers[l.options.team].removeLayer(l);
    delete window.links[guid];
    window.runHooks('linkRemoved', {link: l, data: l.options.data });
  }
}


window.Render.prototype.deleteFieldEntity = function(guid) {
  if (guid in window.fields) {
    var f = window.fields[guid];
    var fd = f.options.details;

    fieldsFactionLayers[f.options.team].removeLayer(f);
    delete window.fields[guid];
    window.runHooks('fieldRemoved', {field: f, data: f.options.data });
  }
}


window.Render.prototype.createPlaceholderPortalEntity = function(guid,latE6,lngE6,team) {
  // intel no longer returns portals at anything but the closest zoom
  // stock intel creates 'placeholder' portals from the data in links/fields - IITC needs to do the same
  // we only have the portal guid, lat/lng coords, and the faction - no other data
  // having the guid, at least, allows the portal details to be loaded once it's selected. however,
  // no highlighters, portal level numbers, portal names, useful counts of portals, etc are possible


  var ent = [
    guid,       //ent[0] = guid
    0,          //ent[1] = timestamp - zero will mean any other source of portal data will have a higher timestamp
                //ent[2] = an array with the entity data
    [ 'p',      //0 - a portal
      team,     //1 - team
      latE6,    //2 - lat
      lngE6     //3 - lng
    ]
  ];

  // placeholder portals don't have a useful timestamp value - so the standard code that checks for updated
  // portal details doesn't apply
  // so, check that the basic details are valid and delete the existing portal if out of date
  if (guid in window.portals) {
    var p = window.portals[guid];
    if (team != p.options.data.team || latE6 != p.options.data.latE6 || lngE6 != p.options.data.lngE6) {
      // team or location have changed - delete existing portal
      this.deletePortalEntity(guid);
    }
  }

  this.createPortalEntity(ent);

}


window.Render.prototype.createPortalEntity = function(ent) {
  this.seenPortalsGuid[ent[0]] = true;  // flag we've seen it

  var previousData = undefined;

  // check if entity already exists
  if (ent[0] in window.portals) {
    // yes. now check to see if the entity data we have is newer than that in place
    var p = window.portals[ent[0]];

    if (p.options.timestamp >= ent[1]) return; // this data is identical or older - abort processing

    // the data we have is newer. many data changes require re-rendering of the portal
    // (e.g. level changed, so size is different, or stats changed so highlighter is different)
    // so to keep things simple we'll always re-create the entity in this case

    // remember the old details, for the callback

    previousData = p.options.data;

    this.deletePortalEntity(ent[0]);
  }

  var portalLevel = parseInt(ent[2][4])||0;
  var team = teamStringToId(ent[2][1]);
  // the data returns unclaimed portals as level 1 - but IITC wants them treated as level 0
  if (team == TEAM_NONE) portalLevel = 0;

  var latlng = L.latLng(ent[2][2]/1E6, ent[2][3]/1E6);

  var data = decodeArray.portalSummary(ent[2]);

  var dataOptions = {
    level: portalLevel,
    team: team,
    ent: ent,  // LEGACY - TO BE REMOVED AT SOME POINT! use .guid, .timestamp and .data instead
    guid: ent[0],
    timestamp: ent[1],
    data: data
  };

  window.pushPortalGuidPositionCache(ent[0], data.latE6, data.lngE6);

  var marker = createMarker(latlng, dataOptions);

  marker.on('click', function() { window.renderPortalDetails(ent[0]); });
  marker.on('dblclick', function() { window.renderPortalDetails(ent[0]); window.map.setView(latlng, 17); });


  window.runHooks('portalAdded', {portal: marker, previousData: previousData});

  window.portals[ent[0]] = marker;

  // check for URL links to portal, and select it if this is the one
  if (urlPortalLL && urlPortalLL[0] == marker.getLatLng().lat && urlPortalLL[1] == marker.getLatLng().lng) {
    // URL-passed portal found via pll parameter - set the guid-based parameter
    console.log('urlPortalLL '+urlPortalLL[0]+','+urlPortalLL[1]+' matches portal GUID '+ent[0]);

    urlPortal = ent[0];
    urlPortalLL = undefined;  // clear the URL parameter so it's not matched again
  }
  if (urlPortal == ent[0]) {
    // URL-passed portal found via guid parameter - set it as the selected portal
    console.log('urlPortal GUID '+urlPortal+' found - selecting...');
    selectedPortal = ent[0];
    urlPortal = undefined;  // clear the URL parameter so it's not matched again
  }

  // (re-)select the portal, to refresh the sidebar on any changes
  if (ent[0] == selectedPortal) {
    console.log('portal guid '+ent[0]+' is the selected portal - re-rendering portal details');
    renderPortalDetails (selectedPortal);
  }

  window.ornaments.addPortal(marker);

  //TODO? postpone adding to the map layer
  this.addPortalToMapLayer(marker);

}


window.Render.prototype.createFieldEntity = function(ent) {
  this.seenFieldsGuid[ent[0]] = true;  // flag we've seen it

  var data = {
//    type: ent[2][0],
    team: ent[2][1],
    points: ent[2][2].map(function(arr) { return {guid: arr[0], latE6: arr[1], lngE6: arr[2] }; })
  };

  //create placeholder portals for field corners. we already do links, but there are the odd case where this is useful
  for (var i=0; i<3; i++) {
    var p=data.points[i];
    this.createPlaceholderPortalEntity(p.guid, p.latE6, p.lngE6, data.team);
  }

  // check if entity already exists
  if(ent[0] in window.fields) {
    // yes. in theory, we should never get updated data for an existing field. they're created, and they're destroyed - never changed
    // but theory and practice may not be the same thing...
    var f = window.fields[ent[0]];

    if (f.options.timestamp >= ent[1]) return; // this data is identical (or order) than that rendered - abort processing

    // the data we have is newer - two options
    // 1. just update the data, assume the field render appearance is unmodified
    // 2. delete the entity, then re-create with the new data
    this.deleteFieldEntity(ent[0]); // option 2, for now
  }

  var team = teamStringToId(ent[2][1]);
  var latlngs = [
    L.latLng(data.points[0].latE6/1E6, data.points[0].lngE6/1E6),
    L.latLng(data.points[1].latE6/1E6, data.points[1].lngE6/1E6),
    L.latLng(data.points[2].latE6/1E6, data.points[2].lngE6/1E6)
  ];

  var poly = L.geodesicPolygon(latlngs, {
    fillColor: COLORS[team],
    fillOpacity: 0.25,
    stroke: false,
    clickable: false,

    team: team,
    ent: ent,  // LEGACY - TO BE REMOVED AT SOME POINT! use .guid, .timestamp and .data instead
    guid: ent[0],
    timestamp: ent[1],
    data: data,
  });

  runHooks('fieldAdded',{field: poly});

  window.fields[ent[0]] = poly;

  // TODO? postpone adding to the layer??
  fieldsFactionLayers[poly.options.team].addLayer(poly);
}

window.Render.prototype.createLinkEntity = function(ent,faked) {
  // Niantic have been faking link entities, based on data from fields
  // these faked links are sent along with the real portal links, causing duplicates
  // the faked ones all have longer GUIDs, based on the field GUID (with _ab, _ac, _bc appended)
  var fakedLink = new RegExp("^[0-9a-f]{32}\.b_[ab][bc]$"); //field GUIDs always end with ".b" - faked links append the edge identifier
  if (fakedLink.test(ent[0])) return;


  this.seenLinksGuid[ent[0]] = true;  // flag we've seen it

  var data = { // TODO add other properties and check correction direction
//    type:   ent[2][0],
    team:   ent[2][1],
    oGuid:  ent[2][2],
    oLatE6: ent[2][3],
    oLngE6: ent[2][4],
    dGuid:  ent[2][5],
    dLatE6: ent[2][6],
    dLngE6: ent[2][7]
  };

  // create placeholder entities for link start and end points (before checking if the link itself already exists
  this.createPlaceholderPortalEntity(data.oGuid, data.oLatE6, data.oLngE6, data.team);
  this.createPlaceholderPortalEntity(data.dGuid, data.dLatE6, data.dLngE6, data.team);


  // check if entity already exists
  if (ent[0] in window.links) {
    // yes. now, as sometimes links are 'faked', they have incomplete data. if the data we have is better, replace the data
    var l = window.links[ent[0]];

    // the faked data will have older timestamps than real data (currently, faked set to zero)
    if (l.options.timestamp >= ent[1]) return; // this data is older or identical to the rendered data - abort processing

    // the data is newer/better - two options
    // 1. just update the data. assume the link render appearance is unmodified
    // 2. delete the entity, then re-create it with the new data
    this.deleteLinkEntity(ent[0]); // option 2 - for now
  }

  var team = teamStringToId(ent[2][1]);
  var latlngs = [
    L.latLng(data.oLatE6/1E6, data.oLngE6/1E6),
    L.latLng(data.dLatE6/1E6, data.dLngE6/1E6)
  ];
  var poly = L.geodesicPolyline(latlngs, {
    color: COLORS[team],
    opacity: 1,
    weight: faked ? 1 : 2,
    clickable: false,

    team: team,
    ent: ent,  // LEGACY - TO BE REMOVED AT SOME POINT! use .guid, .timestamp and .data instead
    guid: ent[0],
    timestamp: ent[1],
    data: data
  });

  runHooks('linkAdded', {link: poly});

  window.links[ent[0]] = poly;

  linksFactionLayers[poly.options.team].addLayer(poly);
}



window.Render.prototype.rescalePortalMarkers = function() {
  if (this.portalMarkerScale === undefined || this.portalMarkerScale != portalMarkerScale()) {
    this.portalMarkerScale = portalMarkerScale();

    console.log('Render: map zoom '+map.getZoom()+' changes portal scale to '+portalMarkerScale()+' - redrawing all portals');

    //NOTE: we're not calling this because it resets highlights - we're calling it as it
    // resets the style (inc size) of all portal markers, applying the new scale
    resetHighlightedPortals();
  }
}



// add the portal to the visible map layer
window.Render.prototype.addPortalToMapLayer = function(portal) {
  portalsFactionLayers[parseInt(portal.options.level)||0][portal.options.team].addLayer(portal);
}

window.Render.prototype.removePortalFromMapLayer = function(portal) {
  //remove it from the portalsLevels layer
  portalsFactionLayers[parseInt(portal.options.level)||0][portal.options.team].removeLayer(portal);
}