/*
 * Copyright (C) 2008-2017, 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;

import com.gargoylesoftware.htmlunit.CookieManager;
import com.gargoylesoftware.htmlunit.Page;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.css.StyleElement;
import com.gargoylesoftware.htmlunit.html.DomElement;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.juick.server.component.MessageReadEvent;
import com.juick.service.*;
import com.juick.util.MessageUtils;
import com.juick.www.WebApp;
import com.mitchellbosecke.pebble.PebbleEngine;
import com.mitchellbosecke.pebble.error.PebbleException;
import com.mitchellbosecke.pebble.template.PebbleTemplate;
import org.apache.commons.text.StringEscapeUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Import;
import org.springframework.core.io.ClassPathResource;
import org.springframework.http.MediaType;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.test.context.TestPropertySource;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.util.FileSystemUtils;

import javax.annotation.Nonnull;
import javax.inject.Inject;
import javax.servlet.http.Cookie;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.StreamSupport;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.*;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;

/**
 * Created by vitalyster on 12.01.2017.
 */
@RunWith(SpringRunner.class)
@AutoConfigureMockMvc
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT, classes = { Application.class})
@TestPropertySource(properties = {"ios_app_id=12345678.com.juick.ExampleApp"})
@Import(WebAppTests.EventListenerConfig.class)
public class WebAppTests {
    @MockBean
    private ImagesService imagesService;
    @Inject
    private WebApp webApp;

    @Inject
    private MockMvc mockMvc;
    @Inject
    private WebClient webClient;

    @Inject
    private UserService userService;
    @Inject
    private MessagesService messagesService;
    @Inject
    private PrivacyQueriesService privacyQueriesService;
    @Inject
    private JdbcTemplate jdbcTemplate;
    @Inject
    private SubscriptionService subscriptionService;
    @Inject
    private MessageReadListener listener;
    @Inject
    private ApplicationEventPublisher applicationEventPublisher;

    @Inject
    private PebbleEngine pebbleEngine;
    @Value("${img_path:#{systemEnvironment['TEMP'] ?: '/tmp'}}")
    private String imgPath;
    @Value("${ios_app_id:}")
    private String appId;

    private static User ugnich, freefd;
    private static String ugnichName, ugnichPassword, freefdName, freefdPassword;

    private static boolean isSetUp = false;

    @Before
    public void setup() throws IOException {
        if (!isSetUp) {
            webClient.getOptions().setJavaScriptEnabled(false);
            webClient.getOptions().setCssEnabled(false);
            webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);

            ugnichName = "ugnich";
            ugnichPassword = "secret";
            freefdName = "freefd";
            freefdPassword = "MyPassw0rd!";

            userService.createUser(ugnichName, ugnichPassword);
            ugnich = userService.getUserByName(ugnichName);
            int freefdId = userService.createUser(freefdName, freefdPassword);
            freefd = userService.getUserByUID(freefdId).orElseThrow(IllegalStateException::new);

            isSetUp = true;
        }
        Files.createDirectory(Paths.get(imgPath, "p"));
        Files.createDirectory(Paths.get(imgPath, "photos-1024"));
        Files.createDirectory(Paths.get(imgPath, "photos-512"));
        Files.createDirectory(Paths.get(imgPath, "ps"));
    }

    @After
    public void teardown() throws IOException {
        FileSystemUtils.deleteRecursively(Paths.get(imgPath, "p"));
        FileSystemUtils.deleteRecursively(Paths.get(imgPath, "photos-1024"));
        FileSystemUtils.deleteRecursively(Paths.get(imgPath, "photos-512"));
        FileSystemUtils.deleteRecursively(Paths.get(imgPath, "ps"));
    }

    @Test
    public void postWithoutTagsShouldNotHaveAsteriskInTitle() throws Exception {
        String msgText = "Привет, я - Угнич";
        int mid = messagesService.createMessage(ugnich.getUid(), msgText, null, null);
        HtmlPage threadPage = webClient.getPage(String.format("http://localhost:8080/ugnich/%d", mid));
        assertThat(threadPage.getTitleText(), equalTo("ugnich:"));
    }
    @Test
    public void bannedUserBlogandPostShouldReturn404() throws IOException {
        String userName = "isilmine";
        String userPassword = "secret";
        String msgText = "автор этого поста был забанен";
        String hash = "12345678";

        User isilmine = userService.getUserByUID(userService.createUser(userName, userPassword)).orElseThrow(IllegalStateException::new);
        int mid = messagesService.createMessage(isilmine.getUid(), msgText, null, null);
        jdbcTemplate.update("UPDATE users SET banned=1 WHERE id=?", isilmine.getUid());
        Page blogPage = webClient.getPage("http://localhost:8080/isilmine");
        Page threadPage = webClient.getPage(String.format("http://localhost:8080/isilmine/%d", mid));
        assertThat(blogPage.getWebResponse().getStatusCode(), equalTo(404));
        assertThat(threadPage.getWebResponse().getStatusCode(), equalTo(404));
    }
    @Test
    public void repliesList() throws IOException {
        int mid = messagesService.createMessage(ugnich.getUid(), "hello", null, null);
        IntStream.range(1, 15).forEach(i ->
                messagesService.createReply(mid, i-1, freefd, String.valueOf(i-1), null ));

        HtmlPage threadPage = webClient.getPage(String.format("http://localhost:8080/ugnich/%d", mid));
        assertThat(threadPage.getWebResponse().getStatusCode(), equalTo(200));
        Long visibleItems = StreamSupport.stream(threadPage.getHtmlElementById("replies")
                .getChildElements().spliterator(), false).filter(e -> {
            StyleElement display = e.getStyleElement("display");
            return display == null || !display.getValue().equals("none");
        }).count();
        assertThat(visibleItems, equalTo(14L));
    }
    @Test
    public void userShouldNotSeeReplyButtonToBannedUser() throws Exception {
        int mid = messagesService.createMessage(ugnich.getUid(), "freefd bl me", null, null);
        messagesService.createReply(mid, 0, ugnich, "yo", null);
        MvcResult loginResult = mockMvc.perform(post("/login")
                .param("username", freefdName)
                .param("password", freefdPassword)).andReturn();
        Cookie loginCookie = loginResult.getResponse().getCookie("juick-remember-me");
        webClient.setCookieManager(new CookieManager());
        webClient.getCookieManager().addCookie(
                new com.gargoylesoftware.htmlunit.util.Cookie(loginCookie.getDomain(),
                        loginCookie.getName(),
                        loginCookie.getValue()));
        HtmlPage threadPage = webClient.getPage(String.format("http://localhost:8080/ugnich/%d", mid));
        assertThat(threadPage.getWebResponse().getStatusCode(), equalTo(200));
        assertThat(threadPage.querySelectorAll(".msg-comment-target").isEmpty(), equalTo(false));
        assertThat(threadPage.querySelectorAll(".a-thread-comment").isEmpty(), equalTo(false));
        privacyQueriesService.blacklistUser(freefd, ugnich);
        assertThat(userService.isInBLAny(freefd.getUid(), ugnich.getUid()), equalTo(true));
        int renhaId = userService.createUser("renha", "secret");
        messagesService.createReply(mid, 0, userService.getUserByUID(renhaId).orElseThrow(IllegalStateException::new),
                "people", null);
        threadPage = webClient.getPage(String.format("http://localhost:8080/ugnich/%d", mid));
        assertThat(threadPage.getWebResponse().getStatusCode(), equalTo(200));
        assertThat(threadPage.querySelectorAll(".msg-comment-target").isEmpty(), equalTo(true));
        assertThat(threadPage.querySelectorAll(".a-thread-comment").isEmpty(), equalTo(true));
    }
    @Test
    public void correctTagsEscaping() throws PebbleException, IOException {
        PebbleTemplate template = pebbleEngine.getTemplate("views/test");
        Writer writer = new StringWriter();
        template.evaluate(writer,
                Collections.singletonMap("tagsList",
                        Collections.singletonList(StringEscapeUtils.escapeHtml4(new Tag(">_<").getName()))));
        String output = writer.toString().trim();
        assertThat(output, equalTo("<a href=\"/ugnich/?tag=%26gt%3B_%26lt%3B\">&gt;_&lt;</a>"));
    }

    public DomElement fetchMeta(String url, String name) throws IOException {
        HtmlPage page = webClient.getPage(url);
        DomElement emptyMeta = new DomElement("", "meta", null, null);
        return page.getElementsByTagName("meta").stream()
                .filter(t -> t.getAttribute("name").equals(name)).findFirst().orElse(emptyMeta);
    }
    @Test
    public void testTwitterCards() throws Exception {

        int mid = messagesService.createMessage(ugnich.getUid(), "without image", null, null);

        assertThat(fetchMeta(String.format("http://localhost:8080/ugnich/%d", mid), "twitter:card")
                .getAttribute("content"), equalTo("summary"));
        int mid2 = messagesService.createMessage(ugnich.getUid(), "with image", "png", null);
        Message message = messagesService.getMessage(mid2);
        assertThat(fetchMeta(String.format("http://localhost:8080/ugnich/%d", mid2), "twitter:card")
                .getAttribute("content"), equalTo("summary_large_image"));
        assertThat(fetchMeta(String.format("http://localhost:8080/ugnich/%d", mid2), "og:description")
                        .getAttribute("content"),
                startsWith(StringEscapeUtils.escapeHtml4(MessageUtils.getMessageHashTags(message))));
    }
    @Test
    public void postMessageTests() throws Exception {
        mockMvc.perform(post("/post2").param("body", "yo")).andExpect(redirectedUrl("http://localhost/login"));
        MvcResult loginResult = mockMvc.perform(post("/login")
                .param("username", ugnichName)
                .param("password", ugnichPassword)).andReturn();
        String msgText = "yoppppl";
        mockMvc.perform(post("/post2")
                .cookie(loginResult.getResponse().getCookies())
                .param("body", msgText)).andExpect(status().isFound());
        Message lastMessage = messagesService.getMessage(messagesService.getMyFeed(ugnich.getUid(), 0, false).get(0));
        assertThat(lastMessage.getText(), equalTo(msgText));
        mockMvc.perform(post("/post2")
                .cookie(loginResult.getResponse().getCookies())
                .param("img", "http://static.juick.com/settings/facebook.png")).andExpect(status().isFound());
        lastMessage = messagesService.getMessage(messagesService.getMyFeed(ugnich.getUid(), 0, false).get(0));
        assertThat(lastMessage.getAttachmentType(), equalTo("png"));
        mockMvc.perform(post("/post2")
                .cookie(loginResult.getResponse().getCookies())
                .param("img", "bad_url")).andExpect(status().isBadRequest());
        FileInputStream fi = new FileInputStream(new ClassPathResource("static/tagscloud.png").getFile());
        MockMultipartFile file = new MockMultipartFile("attach", fi);
        mockMvc.perform(multipart("/post2")
                .file(file)
                .cookie(loginResult.getResponse().getCookies())).andExpect(status().isFound());
        int mid = messagesService.createMessage(ugnich.getUid(), "dummy message", null, null);
        mockMvc.perform(post("/comment")
                .param("mid", String.valueOf(mid))
                .param("body", "yo")).andExpect(redirectedUrl("http://localhost/login"));
        mockMvc.perform(post("/comment")
                .cookie(loginResult.getResponse().getCookies())
                .param("wrong_param", "yo")).andExpect(status().isBadRequest());
        mockMvc.perform(post("/comment")
                .cookie(loginResult.getResponse().getCookies())
                .param("mid", String.valueOf(mid))
                .param("wrong_param", "yo")).andExpect(status().isBadRequest());
        mockMvc.perform(post("/comment")
                .cookie(loginResult.getResponse().getCookies())
                .param("mid", String.valueOf(mid))
                .param("img", "http://static.juick.com/settings/facebook.png")).andExpect(status().isFound());
        mockMvc.perform(multipart("/comment")
                .file(file)
                .cookie(loginResult.getResponse().getCookies())
                .param("mid", String.valueOf(mid))).andExpect(status().isFound());
        mockMvc.perform(post("/comment")
                .cookie(loginResult.getResponse().getCookies())
                .param("mid", String.valueOf(mid))
                .param("body", "yo")).andExpect(redirectedUrl(String.format("/%s/%d#%d", ugnichName, mid, 3)));
        mockMvc.perform(post("/post2")
                .cookie(loginResult.getResponse().getCookies())
                .param("body", String.format("D #%d/%d", mid, 3)))
                .andExpect(status().isFound());
        assertThat(messagesService.getReplies(ugnich, mid).size(), equalTo(2));
    }
    @Test
    public void hashLoginShouldNotUseSession() throws Exception {
        String hash = userService.getHashByUID(ugnich.getUid());
        MvcResult hashLoginResult = mockMvc.perform(get("/?show=my&hash=" + hash))
                .andExpect(status().isOk())
                .andExpect(model().attribute("visitor", hasProperty("authHash", equalTo(hash))))
                .andExpect(content().string(containsString(hash)))
                .andReturn();
        Cookie rememberMeFromHash = hashLoginResult.getResponse().getCookie("juick-remember-me");
        MvcResult formLoginResult = mockMvc.perform(post("/login")
                .param("username", ugnichName)
                .param("password", ugnichPassword)).andReturn();
        Cookie rememberMeFromForm = formLoginResult.getResponse().getCookie("juick-remember-me");
        mockMvc.perform(get("/?show=my").cookie(rememberMeFromForm)).andExpect(status().isOk())
                .andExpect(model().attribute("visitor", hasProperty("authHash", equalTo(hash))))
                .andExpect(content().string(containsString(hash)));
        mockMvc.perform(get("/?show=my").cookie(rememberMeFromHash)).andExpect(status().isOk())
                .andExpect(model().attribute("visitor", hasProperty("authHash", equalTo(hash))))
                .andExpect(content().string(containsString(hash)));
    }
    @Test
    public void nonExistentBlogShouldReturn404() throws Exception {
        mockMvc.perform(get("/ololoe/")).andExpect(status().isNotFound());
    }
    @Test
    public void discussionsShouldBePageableByTimestamp() throws Exception {
        String msgText = "Привет, я снова Угнич";
        int mid = messagesService.createMessage(ugnich.getUid(), msgText, null, null);
        int midNew = messagesService.createMessage(ugnich.getUid(), "Я более новый Угнич", null, null);
        MvcResult loginResult = mockMvc.perform(post("/login")
                .param("username", freefdName)
                .param("password", freefdPassword)).andReturn();
        Cookie loginCookie = loginResult.getResponse().getCookie("juick-remember-me");
        webClient.setCookieManager(new CookieManager());
        webClient.getCookieManager().addCookie(
                new com.gargoylesoftware.htmlunit.util.Cookie(loginCookie.getDomain(),
                        loginCookie.getName(),
                        loginCookie.getValue()));
        String discussionsUrl = "http://localhost:8080/?show=discuss";
        HtmlPage discussions = webClient.getPage(discussionsUrl);
        assertThat(discussions.querySelectorAll("article").size(), is(0));
        subscriptionService.subscribeMessage(messagesService.getMessage(mid), freefd);
        discussions = (HtmlPage) discussions.refresh();
        assertThat(discussions.querySelectorAll("article").size(), is(1));
        subscriptionService.subscribeMessage(messagesService.getMessage(midNew), freefd);
        discussions = (HtmlPage) discussions.refresh();
        assertThat(discussions.querySelectorAll("article").size(), is(2));
        assertThat(discussions.querySelectorAll("article").get(0).getAttributes().getNamedItem("data-mid").getNodeValue(), is(String.valueOf(midNew)));
        messagesService.createReply(mid, 0, freefd, "I'm replied", null);
        discussions = (HtmlPage) discussions.refresh();
        assertThat(discussions.querySelectorAll("article").size(), is(2));
        assertThat(discussions.querySelectorAll("article").get(0).getAttributes().getNamedItem("data-mid").getNodeValue(), is(String.valueOf(mid)));
        Message msg = messagesService.getMessage(mid);
        HtmlPage discussionsOld = webClient.getPage(discussionsUrl + "&to=" + msg.getUpdated().toEpochMilli());
        assertThat(discussionsOld.querySelectorAll("article").size(), is(1));
        assertThat(discussionsOld.querySelectorAll("article").get(0).getAttributes().getNamedItem("data-mid").getNodeValue(), is(String.valueOf(midNew)));
        List<Integer> newMids = IntStream.rangeClosed(1, 19).map(i -> messagesService.createMessage(ugnich.getUid(), String.valueOf(i), null, null)).boxed().collect(Collectors.toList());
        for (Integer m : newMids) {
            subscriptionService.subscribeMessage(messagesService.getMessage(m), freefd);
        }
        discussions = (HtmlPage) discussions.refresh();
        assertThat(discussions.querySelectorAll("article").size(), is(20));
        assertThat(discussions.querySelectorAll("article")
                .get(19).getAttributes().getNamedItem("data-mid").getNodeValue(), is(String.valueOf(mid)));
        messagesService.createReply(midNew, 0, freefd, "I'm replied", null);
        discussions = (HtmlPage) discussions.refresh();
        assertThat(discussions.querySelectorAll("article")
                .get(0).getAttributes().getNamedItem("data-mid").getNodeValue(), is(String.valueOf(midNew)));
        Message old = messagesService.getMessage(newMids.get(0));
        discussionsOld = webClient.getPage(discussionsUrl + "&to=" + old.getUpdated().toEpochMilli());
        assertThat(discussionsOld.querySelectorAll("article").size(), is(1));
        assertThat(discussionsOld.querySelectorAll("article")
                .get(0).getAttributes().getNamedItem("data-mid").getNodeValue(), is(String.valueOf(mid)));
    }
    @Test
    public void redirectParamShouldCorrectlyRedirectLoggedUser() throws Exception {
        MvcResult formLoginResult = mockMvc.perform(post("/login")
                .param("username", ugnichName)
                .param("password", ugnichPassword)).andReturn();
        Cookie rememberMeFromForm = formLoginResult.getResponse().getCookie("juick-remember-me");
        mockMvc.perform(get("/login").cookie(rememberMeFromForm))
                .andExpect(status().is3xxRedirection())
                .andExpect(redirectedUrl("/"));
        mockMvc.perform(get("/login?redirect=false").cookie(rememberMeFromForm))
                .andExpect(status().is3xxRedirection())
                .andExpect(redirectedUrl("/login/success"));
    }
    @Test
    public void anythingRedirects() throws Exception {
        int mid = messagesService.createMessage(ugnich.getUid(), "yo", null, null);
        mockMvc.perform(get(String.format("/%d", mid))).andExpect(redirectedUrl(String.format("/%s/%d", ugnich.getName(), mid)));
    }
    @Test
    public void appAssociationsTest() throws Exception {
        mockMvc.perform((get("/.well-known/apple-app-site-association")))
                .andExpect(status().isOk())
                .andExpect(content().contentType(MediaType.APPLICATION_JSON_UTF8))
                .andExpect(jsonPath("$.webcredentials.apps[0]", is(appId)));
    }
    @Test
    public void notificationsTests() throws Exception {
        listener.clear();
        MvcResult loginResult = mockMvc.perform(post("/login")
                .param("username", freefdName)
                .param("password", freefdPassword)).andReturn();
        Cookie loginCookie = loginResult.getResponse().getCookie("juick-remember-me");
        webClient.setCookieManager(new CookieManager());
        webClient.getCookieManager().addCookie(
                new com.gargoylesoftware.htmlunit.util.Cookie(loginCookie.getDomain(),
                        loginCookie.getName(),
                        loginCookie.getValue()));
        int mid = messagesService.createMessage(ugnich.getUid(), "new test", null, null);
        subscriptionService.subscribeMessage(messagesService.getMessage(mid), freefd);
        int rid = messagesService.createReply(mid, 0, ugnich, "new reply", null);
        HtmlPage discussionsPage = webClient.getPage("http://localhost:8080/?show=discuss");
        assertThat(discussionsPage.querySelectorAll("#global a .badge").size(), is(1));
        HtmlPage unreadThread = webClient.getPage(String.format("http://localhost:8080/ugnich/%d", mid));
        assertThat(unreadThread.querySelectorAll("#global a .badge").size(), is(0));
        assertThat(listener.getUnreadCounts().size(), is(1));
        assertThat(listener.getUnreadCounts().get(0), is(0));
        messagesService.createReply(mid, 0, ugnich, "new reply", null);
        assertThat(messagesService.getUnread(freefd).size(), is(1));
        unreadThread.refresh();
        assertThat(listener.getUnreadCounts().size(), is(2));
        assertThat(listener.getUnreadCounts().get(1), is(0));
    }

    public static class EventListenerConfig {
        @Bean
        public MessageReadListener listener() {
            return new MessageReadListener();
        }
    }

    private static class MessageReadListener implements ApplicationListener<MessageReadEvent> {
        @Inject
        private MessagesService messagesService;
        private List<Integer> unreadCounts = new ArrayList<>();
        @Override
        public void onApplicationEvent(@Nonnull MessageReadEvent event) {
            if (event.getUser().equals(freefd)) {
                unreadCounts.add(messagesService.getUnread(event.getUser()).size());
            }
        }

        public List<Integer> getUnreadCounts() {
            return unreadCounts;
        }
        public void clear() {
            unreadCounts.clear();
        }
    }
}