package com.juick.www.controllers;

import com.juick.server.util.HttpNotFoundException;
import com.juick.service.MessagesService;
import com.juick.util.UserUtils;
import com.juick.www.HelpService;
import com.juick.www.WebApp;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

import javax.inject.Inject;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.Locale;
import java.util.Objects;
import java.util.Optional;

/**
 * Created by aalexeev on 11/21/16.
 */
@Controller
public class Help {
    @Inject
    private HelpService helpService;
    @Inject
    private MessagesService messagesService;
    @Inject
    private WebApp webApp;

    @GetMapping({"/help/", "/help", "/help/{langOrPage}", "/help/{lang}/{page}"})
    public String showHelp(
            HttpServletRequest request,
            HttpServletResponse response,
            Locale locale,
            @PathVariable("lang") Optional<String> langParam,
            @PathVariable("page") Optional<String> pageParam,
            @PathVariable("langOrPage") Optional<String> langOrPageParam,
            Model model) throws IOException, URISyntaxException {
        com.juick.User visitor = UserUtils.getCurrentUser();
        String page = pageParam.orElse("index");
        String lang = langParam.orElse(locale.getLanguage());

        String navigation = null;

        if (langOrPageParam.isPresent()) {
            String langOrPage = langOrPageParam.get();

            if (helpService.canBeLang(langOrPage)) {
                navigation = helpService.getHelp("navigation", langOrPage);
                if (navigation != null)
                    lang = langOrPage;
            }

            if (navigation == null && helpService.canBePage(langOrPage))
                page = langOrPage;
        }

        String content = helpService.getHelp(page, lang);
        if (content == null && !Objects.equals("index", page))
            content = helpService.getHelp("index", lang);

        if (navigation == null)
            navigation = helpService.getHelp("navigation", lang);

        if (content == null || navigation == null)
            throw new HttpNotFoundException();

        model.addAttribute("navigation", navigation);
        model.addAttribute("content", content);
        model.addAttribute("visitor", visitor);
        model.addAttribute("readonly", messagesService.isReadonly());

        return "views/help";
    }
}