module nl.netsoj.chris.blog.interfaces.indieauth;

import nl.netsoj.chris.blog.interfaces.http;
import nl.netsoj.chris.blog.interfaces.micropub;
import nl.netsoj.chris.blog.microformats.parser;

import mfd = nl.netsoj.chris.blog.microformats.definitions;

import vibe.d;

struct App {
	string logo;;
	string name;
	string url;
	string clientId;
	string redirectUri;
	bool richInfo = false;
}

/**
 * An implementation of https://www.w3.org/TR/indieauth/
 */
@translationContext!TranslateContext
class IndieAuth {
public:
	this() {
		m_microPub = new MicroPub();
	}

	@queryParam("response_type", "response_type")
	@queryParam("me", "me")
	@queryParam("client_id", "client_id")
	@queryParam("redirect_uri", "redirect_uri")
	@queryParam("state", "state")
	void getAuth(HTTPServerRequest req, HTTPServerResponse res,
			string response_type, string me, string client_id, string redirect_uri, string state) {
		enforceHTTP(response_type == "code", HTTPStatus.badRequest);
		
		URL source = URL(client_id);
		HTTPClientResponse response = requestHTTP(source);
		mfd.App[] parsedApps = parsePage!(mfd.App)(response.bodyReader.readAllUTF8, source);
		
		App app;
		app.name = client_id;
		app.richInfo = false;
		if (parsedApps.length > 0) {
			auto parsedApp = parsedApps[0];
			app.logo = parsedApp.logo;
			app.name = parsedApp.name;
			app.richInfo = true;
		}
		
		app.clientId = client_id;
		URL redirectUrl = URL(redirect_uri);
		redirectUrl.queryString = redirectUrl.queryString ~ "%scode=%s&state=%s".format(
				(redirectUrl.queryString.length == 0 ? "" : "&"),
				"123456", state);
		app.redirectUri = redirectUrl.toString();
		render!("pages/indieauth.dt", app);
	}
	
	@safe
	@path("/")
	void getIndex(HTTPServerResponse res) {
		res.writeBody("IndieAuth root", "text/plain");
	}
	
	@safe
	void postToken(HTTPServerRequest req, HTTPServerResponse res, 
			string grant_type, string code, string client_id, string redirect_uri, string me) {
	
		struct OkResponse {
			string access_token;
			string token_type = "Bearer";
			string me;
			string scope_;
		}
		
		OkResponse response;
		response.me = me;
		response.scope_ = "foo";
		response.access_token = "baz";
		
		res.writeJsonBody(response, HTTPStatus.ok);
	}  
	
	@safe @property 
	MicroPub micropub() { return m_microPub; };
	
private:
	MicroPub m_microPub;
}