import std.array : array, replace;
import std.datetime : Clock;
import std.format : format;
import std.getopt : defaultGetoptPrinter, getopt;
import std.json : JSONValue;
import std.stdio : File, writeln;

import requests : postContent;

import fahrplanparser;

import substitution;

void main(string[] args)
{
    string fileName;
    string busStop = "Universität Regensburg";
    string substitutionFileName = "replacement.txt";

    auto helpInformation = getopt(args,
            "file|f", "The file that the data is written to.", &fileName,
            "stop|s", "The bus stop for which to fetch data.", &busStop,
            "replacement-file|r", "The file that contais the direction name replacement info.", &substitutionFileName);

    if (helpInformation.helpWanted)
    {
        defaultGetoptPrinter("Some information about the program.", helpInformation.options);
        return;
    }

    auto content = postContent("http://txt.bayern-fahrplan.de/textversion/bcl_abfahrtstafel",
            ["limit" : "20",
             "useRealtime" : "1",
             "name_dm" : busStop,
             "mode" : "direct",
             "type_dm" : "any",
             "itdLPxx_bcl" : "true"]);

    loadSubstitutionFile(substitutionFileName);

    auto currentTime = Clock.currTime;
    JSONValue j = ["time" : "%02s:%02s".format(currentTime.hour, currentTime.minute)];
    j.object["departures"] = (cast(string) content.data).parsedFahrplan.array.JSONValue;
    auto output = j.toPrettyString.replace("\\/", "/");
    if (fileName !is null)
    {
        auto outfile = File(fileName, "w");
        scope (exit)
            outfile.close;
        outfile.writeln(output);
    }
    else
    {
        output.writeln;
    }

}