import handy_httpd;

import std.conv : to;

void main(string[] args) {
	ServerConfig cfg;
    cfg.workerPoolSize = 5;
    cfg.defaultHeaders["Access-Control-Allow-Origin"] = "*";

    if (args.length >= 2) cfg.hostname = args[1];
    if (args.length >= 3) cfg.port = args[2].to!ushort;
    
    new HttpServer(new RequestHandler(), cfg).start();
}

class RequestHandler : HttpRequestHandler {
    void handle(ref HttpRequestContext ctx) {
        auto maybeParam = ctx.request.queryParams.getFirst("address");
        if (!maybeParam) {
            ctx.response.status = HttpStatus.BAD_REQUEST;
            ctx.response.writeBodyString("Required query parameter \"address\" is missing.");
            return;
        }
        string address = maybeParam.value;
        bool pingSuccessful = doPing(address);
        import std.json;
        JSONValue responseBody = JSONValue.emptyObject;
        responseBody.object["success"] = JSONValue(pingSuccessful);
        ctx.response.writeBodyString(responseBody.toJSON, "application/json");
    }

    bool doPing(string address) {
        import std.process;
        auto result = execute(["ping", address, "-c", "1", "-W", "1"]);
        const int status = result.status;
        return status == 0;
    }
}