import std.stdio;
import std.conv;

import vibe.d;
import vibe.data.json;
import vibe.textfilter.urlencode;

void helloWorld(HTTPServerRequest req,
        HTTPServerResponse res)
{
    res.writeBody("Hello");
}


class ApiRequest
{
}

struct ApiResponse
{
	ResponseSet[] responseSets;
	bool pendingResponseSets;
}

struct ResponseSet
{
	string applicationId;
	int requestCounter;
	Json[] responses;
}

class OpenSession : ApiRequest
{
	string applicationType;
	string locale;
	string[string] attributes;

	this(string applicationType, string locale, string[string] attributes)
	{
		this.applicationType = applicationType;
		this.locale = locale;
		this.attributes = attributes;
	}
}

class StartFlow : ApiRequest
{
	string applicationType;
	string applicationId;
	string flowName;
	string[string] attributes;
	string[string] privateAttributes;

	this(string applicationType, string applicationId, string flowName, string[string] attributes, string[string] privateAttributes)
	{
		this.applicationType = applicationType;
		this.applicationId = applicationId;
		this.flowName = flowName;
		this.attributes = attributes;
		this.privateAttributes = privateAttributes;
	}
}

class ApiMessage
{
	string executionMode;
	string protocolVersion;
	Json[string][] requests;

	this(string executionMode)
	{
		this.executionMode = executionMode;
		this.protocolVersion = "2.1";

		Json[string] requestArray;
		this.requests = [requestArray];
	}

	void addRequest(T : ApiRequest)(string name, T request)
	{
		requests[0][name] = request.serializeToJson;
	}
}

class SessionApiMessage : ApiMessage
{
	string sessionId;
	string applicationId;
	string requestCounter;

	this(string executionMode, string sessionId, string applicationId, int requestCounter)
	{
		super(executionMode);
		this.sessionId = sessionId;
		this.applicationId = applicationId;
		this.requestCounter = requestCounter.to!string;
	}
}

class ApiClient
{
	enum string Endpoint = "https://m.belfius.be/F2CRenderingDexiaToClient/GEPARendering/machineIdentifier=s0/";

	private string _locale;

	private string _sessionId;
	private int _requestCounter;

	this(string locale)
	{
		_locale = locale;
	}

	void connect()
	{
		auto openSessionRequest = new OpenSession("yui3a", _locale, ["application": "Container", "P": "P055"]);

		auto response = sendRequest("sequential", openSessionRequest);

		_sessionId = response.responseSets[0].responses[0]["SessionOpened"][0]["sessionId"].get!string;
		_requestCounter = 1;

		auto startFlowRequest = new StartFlow("yui3a", "Container", "gef0.gef1.gemd.Flow_MobileApplication.diamlflow", ["deviceType": "simple", "language": "2", "smsType": "otpUrl"], null);
		response = sendRequest("sequential", startFlowRequest);
	}

	ApiResponse sendRequest(T : ApiRequest)(string executionMode, T request)
	{

		string requestString;
		if(_sessionId !is null)
		{
			auto message = new SessionApiMessage(executionMode, _sessionId, "Container", ++_requestCounter);
			message.addRequest(T.stringof, request);
			requestString = message.serializeToJsonString;
		}
		else
		{
			auto message = new ApiMessage(executionMode);
			message.addRequest(T.stringof, request);
			requestString = message.serializeToJsonString;
		}

		auto response = requestHTTP(Endpoint,
			(scope request) {
				request.method = HTTPMethod.POST;
				request.headers["Accept"] = "*/*";
				request.headers["Content-Type"] = "application/x-www-form-urlencoded";
				request.headers["User-Agent"] = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.76 Safari/537.36";
				request.writeBody(cast(ubyte[])("request=" ~ requestString.urlEncode));
			}
		).bodyReader.readAllUTF8;

		auto json = response.parseJsonString;

		return json.deserializeJson!ApiResponse;
	}
}

shared static this()
{
    auto router = new URLRouter;
    router.get("/hello", &helloWorld);

    auto settings = new HTTPServerSettings;
    settings.sessionStore = new MemorySessionStore;
    settings.port = 8080;
	settings.bindAddresses = ["::1", "127.0.0.1"];

    listenHTTP(settings, router);

	auto apiClient = new ApiClient("nl_BE");
	apiClient.connect();
}