package com.juick.www.controllers;

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

import javax.inject.Inject;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.Locale;
import java.util.Optional;

/**
 * Created by aalexeev on 11/21/16.
 */
@Controller
public class HelpController {
    @Inject
    private HelpService helpService;

    @RequestMapping({"/help", "/help/{langOrPage}", "/help/{lang}/{page}"})
    public String showHelp(
            Locale locale,
            @PathVariable("lang") Optional<String> langParam,
            @PathVariable("page") Optional<String> pageParam,
            @PathVariable("langOrPage") Optional<String> langOrPageParam,
            Model model) throws IOException, URISyntaxException {

        String page = pageParam.orElse("index");
        String lang = langParam.orElse(locale.getLanguage());

        model.addAttribute("visitor", UserUtils.getCurrentUser());
        model.addAttribute("help_nav", getContent("navigation", lang, Optional.empty()));
        model.addAttribute("help_data", getContent(page, lang, langOrPageParam));

        return "views/help";
    }

    private String getContent(String page, String lang, Optional<String> langOrPageParam) {
        String content = null;

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

            if (helpService.canLang(anything))
                content = helpService.getHelp(page, anything);

            if (content == null && helpService.canPage(anything))
                content = helpService.getHelp(anything, lang);
        } else
            content = helpService.getHelp(page, lang);

        if (content != null)
            return content;

        throw new HttpNotFoundException();
    }
}