package net.curisit.securis.services;

import java.net.URI;
import java.util.Date;

import javax.inject.Inject;
import javax.inject.Singleton;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.core.UriBuilder;

import net.curisit.integrity.commons.Utils;
import net.curisit.securis.security.Securable;
import net.curisit.securis.utils.TokenHelper;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

/**
 * Basic services for login and basic app wrkflow
 * 
 * @author roberto <roberto.sanchez@curisit.net>
 */
@Path("/")
@Singleton
public class BasicServices {

    private static final Logger LOG = LogManager.getLogger(BasicServices.class);

    @Inject
    TokenHelper tokenHelper;

    @Inject
    public BasicServices() {
    }

    @GET
    @Path("/info")
    @Produces({
        MediaType.TEXT_PLAIN
    })
    public Response info(@Context HttpServletRequest request) {
        return Response.ok().entity("License server running OK. Date: " + new Date()).build();
    }

    @GET
    @Path("/{module:(admin)|(login)|(licenses)}")
    @Produces({
        MediaType.TEXT_HTML
    })
    public Response init(@PathParam("module") String module, @Context HttpServletRequest request) {
        LOG.info("App index main.html");
        String page = "/main.html";
        URI uri = UriBuilder.fromUri(page).build();
        return Response.seeOther(uri).build();
    }

    @POST
    @Path("/login")
    @Produces({
        MediaType.APPLICATION_JSON
    })
    public Response login(@FormParam("username") String user, @FormParam("password") String password, @Context HttpServletRequest request) {
        LOG.info("index session: " + request.getSession());
        LOG.info("user: {}, pass: {}", user, password);
        LOG.info("is user in role: {} == {} ? ", "advance", request.isUserInRole("advance"));

        if ("no".equals(password)) {
            // TODO: Code to text exception handling
            return Response.status(Status.UNAUTHORIZED).build();
        }
        String tokenAuth = tokenHelper.generateToken(user);
        return Response.ok(Utils.createMap("success", true, "token", tokenAuth)).build();
    }

    /**
     * Check if current token is valid
     * 
     * @param user
     * @param password
     * @param request
     * @return
     */
    @GET
    @Securable()
    @Path("/check")
    @Produces({
        MediaType.APPLICATION_JSON
    })
    public Response check(@HeaderParam(TokenHelper.TOKEN_HEADER_PÀRAM) String token, @QueryParam("token") String token2) {
        if (token == null) {
            token = token2;
        }
        if (token == null) {
            return Response.status(Status.FORBIDDEN).build();
        }
        boolean valid = tokenHelper.isTokenValid(token);
        if (!valid) {
            return Response.status(Status.UNAUTHORIZED).build();
        }

        String user = tokenHelper.extractUserFromToken(token);
        Date date = tokenHelper.extractDateCreationFromToken(token);

        return Response.ok(Utils.createMap("valid", true, "user", user, "date", date)).build();
    }

    @GET
    @POST
    @Path("/logout")
    @Produces({
        MediaType.APPLICATION_JSON
    })
    public Response logout(@HeaderParam(TokenHelper.TOKEN_HEADER_PÀRAM) String token) {
        if (token == null) {
            Response.status(Status.BAD_REQUEST).build();
        }
        String user = tokenHelper.extractUserFromToken(token);
        LOG.info("User {} has logged out", user);
        return Response.ok().build();
    }
}