option java_package = "net.osmand.binary";
//protoc --java_out=../.. osmand_odb.proto


//
//  STORAGE LAYER: Storing primitives.
//

// IMPORTANT :  These messages are not intented to be parsed by google engine (because of the size)
 // The main difference that size of that messages is not var int and is always fixed int size
message OsmAndStructure {
   required uint32 version = 1;
   // encoded as fixed32 length delimited
   repeated OsmAndMapIndex mapIndex = 2;  
} 

message OsmAndMapIndex {
   // encoded as fixed32 length delimited 
   repeated MapRootLevel levels = 1;  
}

message MapRootLevel {
   required int32 maxZoom = 1;
   required int32 minZoom = 2;
   required int32 left = 3; 
   required int32 right = 4; 
   required int32 top = 5; 
   required int32 bottom = 6;
   
   // encoded as fixed32 length delimited
   repeated MapTree root = 7;
   
}

message MapTree {
   required sint32 left = 1; // delta encoded
   required sint32 right = 2; // delta encoded
   required sint32 top = 3; // delta encoded
   required sint32 bottom = 4; // delta encoded
   
   optional StringTable stringTable = 5;
   optional uint64 baseId = 6;
   
   // encoded as fixed32 length delimited
   repeated MapTree subtrees = 7;
   
   repeated MapData leafs = 8;
   
}

// These messages could be read directly
/** 
  String table, contains the common strings in each block.
 */
message StringTable {
   repeated string s = 1;
}


/// Simple messages
message MapData {
  required bytes coordinates = 1; // array of delta x,y sint32 could be read by codedinputstream
  								 // first x delta to Tree.left, y to delta Tree.top (next delta to previous)
  required bytes types = 2; // array of fixed int16
  
  required sint64 id = 3; // delta encoded
  optional uint32 stringId = 4;
  
  optional bytes restrictions = 5; // array of SInt64 delta encoded (to baseId !)
  optional int32 highwayMeta = 6; 
}