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/*
 * Copyright (C) 2008-2023, Juick
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.juick.www.controllers;

import com.juick.model.User;
import com.juick.util.HttpBadRequestException;
import com.juick.util.HttpForbiddenException;
import com.juick.util.UsernameTakenException;
import com.juick.www.WebApp;
import com.juick.service.EmailService;
import com.juick.service.UserService;
import com.juick.service.security.entities.JuickUser;
import io.swagger.v3.oas.annotations.Parameter;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.security.authentication.RememberMeAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.RememberMeServices;
import org.springframework.security.web.authentication.rememberme.AbstractRememberMeServices;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;

import jakarta.inject.Inject;

/**
 *
 * @author Ugnich Anton
 */
@Controller
public class SignUp {

    @Inject
    private UserService userService;
    @Inject
    private EmailService emailService;
    @Inject
    private WebApp webApp;
    @Inject
    private RememberMeServices rememberMeServices;


    @GetMapping("/signup")
    protected String doGet(
            @Parameter(hidden = true) User visitor,
            @RequestParam String type, @RequestParam String hash, ModelMap model) {
        if (hash.length() > 36 || !type.matches("^[a-zA-Z0-9\\-]+$")
                || !hash.matches("^[a-zA-Z0-9\\-]+$")) {
            throw new HttpBadRequestException();
        }

        String account = null;
        switch (type) {
            case "fb":
                account = userService.getFacebookNameByHash(hash);
                break;
            case "vk":
                account = userService.getVKNameByHash(hash);
                break;
            case "xmpp":
                account = userService.getJIDByHash(hash);
                break;
            case "durov":
                account = userService.getTelegramNameByHash(hash);
                break;
            case "email":
                account = emailService.getEmailByAuthCode(hash);
        }
        if (account == null) {
            throw new HttpBadRequestException();
        }

        model.addAttribute("title", "Новый пользователь");
        visitor.setAvatar(webApp.getAvatarWebPath(visitor));
        model.addAttribute("visitor", visitor);
        model.addAttribute("account", account);
        model.addAttribute("type", type);
        model.addAttribute("hash", hash);
        model.addAttribute("headers", "<meta name=\"robots\" content=\"noindex\"/>");
        return "views/signup";
    }

    @PostMapping("/signup")
    protected String doPost(
            HttpServletRequest request,
            HttpServletResponse response,
            @Parameter(hidden = true) User visitor,
            @RequestParam String type,
            @RequestParam String hash,
            @RequestParam String action,
            @RequestParam(required = false) String username,
            @RequestParam(required = false) String password,
            ModelMap modelMap) {
        User current;

        if (hash.length() > 36 || !type.matches("^[a-zA-Z0-9\\-]+$") || !hash.matches("^[a-zA-Z0-9\\-]+$")) {
            modelMap.addAttribute("result", "Invalid request");
            modelMap.addAttribute("visitor", visitor);
            return "views/signup_result";
        }

        if (action.charAt(0) == 'l') {

            if (visitor.isAnonymous()) {
                if (username.length() > 32) {
                    modelMap.addAttribute("result", "Invalid request");
                    modelMap.addAttribute("visitor", visitor);
                    return "views/signup_result";
                }
                current = userService.checkPassword(username, password).orElseThrow(HttpForbiddenException::new);
            } else {
                current = visitor;
            }

            if (current.getUid() <= 0) {
                modelMap.addAttribute("result", "Invalid request");
                modelMap.addAttribute("visitor", visitor);
                return "views/signup_result";
            }

            if (!(type.charAt(0) == 'f' && userService.setFacebookUser(hash, current.getUid()))
                    && !(type.charAt(0) == 'v' && userService.setVKUser(hash, current.getUid()))
                    && !(type.charAt(0) == 'd' && userService.setTelegramUser(hash, current.getUid()))
                    && !(type.charAt(0) == 'x' && userService.getAllJIDs(visitor).size() > 0
                    && userService.setJIDUser(hash, current.getUid()))) {
                if (type.equals("email")) {
                    String email = emailService.getEmailByAuthCode(hash);
                    emailService.addEmail(current.getUid(), email);
                    emailService.deleteAuthCode(hash);
                } else {
                    if (type.equals("xmpp")) {
                        modelMap.addAttribute("result", "XMPP support is disabled for new users");
                    } else {
                        modelMap.addAttribute("result", "Invalid request");
                    }
                    modelMap.addAttribute("visitor", visitor);
                    return "views/signup_result";
                }
            }

        } else { // Create new account
            if (username.length() < 2 || username.length() > 16 || !username.matches("^[a-zA-Z0-9\\-]+$") || password.length() < 6 || password.length() > 32) {
                modelMap.addAttribute("visitor", visitor);
                modelMap.addAttribute("result", "Bad username or password");
                return "views/signup_result";
            }

            try {
                current = userService.createUser(username, password).orElseThrow(HttpBadRequestException::new);
            } catch(UsernameTakenException e) {
                modelMap.addAttribute("visitor", visitor);
                modelMap.addAttribute("result", e.getMessage());
                return "views/signup_result";
            }

            if (!(type.charAt(0) == 'f' && userService.setFacebookUser(hash, current.getUid()))
                    && !(type.charAt(0) == 'v' && userService.setVKUser(hash, current.getUid()))
                    && !(type.charAt(0) == 'd' && userService.setTelegramUser(hash, current.getUid()))) {
                if (type.equals("email")) {
                    String email = emailService.getEmailByAuthCode(hash);
                    emailService.addEmail(current.getUid(), email);
                    emailService.deleteAuthCode(hash);
                } else {
                    if (type.equals("xmpp")) {
                        modelMap.addAttribute("result", "XMPP support is disabled for new users");
                    } else {
                        modelMap.addAttribute("result", "Invalid request");
                    }
                    modelMap.addAttribute("visitor", visitor);
                    return "views/signup_result";
                }
            }
        }

        if (visitor.isAnonymous()) {
            var authentication = new RememberMeAuthenticationToken(
                    ((AbstractRememberMeServices) rememberMeServices).getKey(),
                    new JuickUser(current), JuickUser.USER_AUTHORITY);
            SecurityContextHolder.getContext().setAuthentication(authentication);
            rememberMeServices.loginSuccess(request, response, authentication);
        }
        return "redirect:/";
    }
}