# A3XX ND Canvas
# Joshua Davidson (it0uchpods)
# Based on work by artix

# Copyright (c) 2019 Joshua Davidson (it0uchpods)

var version = getprop("sim/version/flightgear");
var v = split(".", version);
version = num(v[0]~"."~v[1]);

setlistener("/nasal/canvas/loaded", func() {

    ####### LOAD FILES #######
    #print("loading files");
    (func {
     var aircraft_root = getprop("/sim/aircraft-dir");

    var load = func(file, name) {
        #print("Loading ..." ~ file);
        if (name == nil)
            var name = split("/", file)[-1];
        if (substr(name, size(name)-4) == ".draw")
        name = substr(name, 0, size(name)-5);
        #print("reading file");
        var code = io.readfile(file);
        #print("compiling file");
        # This segfaults for some reason:
        #var code = call(compile, [code], var err=[]);
        var code = call(func compile(code, file), [code], var err=[]);
        if (size(err)) {
            #print("handling error");
            if (substr(err[0], 0, 12) == "Parse error:") { # hack around Nasal feature
                var e = split(" at line ", err[0]);
                if (size(e) == 2)
                err[0] = string.join("", [e[0], "\n  at ", file, ", line ", e[1], "\n "]);
            }
            for (var i = 1; (var c = caller(i)) != nil; i += 1)
            err ~= subvec(c, 2, 2);
            debug.printerror(err);
            return;
        }
        #print("calling code");
        call(code, nil, nil, var hash = {});
        #debug.dump(keys(hash));
        return hash;
    };

    var load_deps = func(name) {
        print("Loading MapStructure Layer: "~ name);
        load(aircraft_root~"/Models/Instruments/ND/map/"~name~".lcontroller",  name);
        load(aircraft_root~"/Models/Instruments/ND/map/"~name~".symbol", name);
        if(version < 3.2)
            load(aircraft_root~"/Models/Instruments/ND/map/"~name~".scontroller", name);
    }

    #foreach( var name; ["APS","ALT-profile","SPD-profile","RTE","WPT","DECEL","NDB"] )
    #load_deps( name );
    var dep_names = [
        # With these extensions, in this order:
        "lcontroller",
        "symbol",
        "scontroller",
        "controller",
    ];
    var map_root = aircraft_root~"/Models/Instruments/ND/canvas/map/";
    var files = directory(map_root);
    var deps = {};
    foreach (var d; dep_names) deps[d] = [];
    foreach(var f; files){
        var ext = size(var s=split(".", f)) > 1 ? s[-1] : nil;
        foreach (var d; dep_names) {
            if (ext == d) {
                append(deps[d], f);
                break
            }
        }
    }

    foreach (var d; dep_names) {
        foreach (var f; deps[d]) {
            var name = split(".", f)[0];
            load(map_root~f, name);
        }
    }

})();


}, 1);