/*
 * 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.www;

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.Message;
import com.juick.Tag;
import com.juick.User;
import com.juick.configuration.RepositoryConfiguration;
import com.juick.service.ImagesService;
import com.juick.service.MessagesService;
import com.juick.service.MockImagesService;
import com.juick.service.PrivacyQueriesService;
import com.juick.service.UserService;
import com.juick.util.MessageUtils;
import com.juick.www.configuration.SapeConfiguration;
import com.juick.www.configuration.WebSecurityConfig;
import com.juick.www.configuration.WwwAppConfiguration;
import com.juick.www.configuration.WwwServletConfiguration;
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.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.htmlunit.MockMvcWebClientBuilder;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.util.FileSystemUtils;
import org.springframework.web.context.WebApplicationContext;

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.Collections;
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.security.test.web.servlet.setup.SecurityMockMvcConfigurers.springSecurity;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.multipart;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;

/**
 * Created by vitalyster on 12.01.2017.
 */
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(classes = {
        WwwServletConfiguration.class, WwwAppConfiguration.class, SapeConfiguration.class,
        RepositoryConfiguration.class, WebSecurityConfig.class
})
public class WebAppTests {
    @Configuration
    @ComponentScan(basePackages = "com.juick.www.controllers")
    static class Config {
        @Bean
        public ImagesService imagesService() {
            return new MockImagesService();
        }
    }

    @Inject
    private WebApplicationContext wac;
    @Inject
    private WebApp webApp;

    private static MockMvc mockMvc;
    private static WebClient webClient;

    @Inject
    private UserService userService;
    @Inject
    private MessagesService messagesService;
    @Inject
    private PrivacyQueriesService privacyQueriesService;
    @Inject
    private JdbcTemplate jdbcTemplate;

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

    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) {
            mockMvc = MockMvcBuilders.webAppContextSetup(wac)
                    .apply(springSecurity())
                    .build();
            webClient = MockMvcWebClientBuilder.mockMvcSetup(mockMvc).build();
            webClient.getOptions().setJavaScriptEnabled(false);
            webClient.getOptions().setCssEnabled(false);
            webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);

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

            int ugnichId = userService.createUser(ugnichName, ugnichPassword);
            ugnich = userService.getUserByUID(ugnichId).orElseThrow(IllegalStateException::new);
            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 repliesTree() throws IOException {
        int mid = messagesService.createMessage(ugnich.getUid(), "hello", null, null);
        IntStream.range(1, 15).forEach(i ->
                messagesService.createReply(mid, i-1, freefd.getUid(), 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(1L));
    }
    @Test
    public void userShouldNotSeeReplyButtonToBannedUser() throws Exception {
        int mid = messagesService.createMessage(ugnich.getUid(), "freefd bl me", null, null);
        messagesService.createReply(mid, 0, ugnich.getUid(), "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));
        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("/post").param("body", "yo")).andExpect(redirectedUrl("http://localhost/login"));
        MvcResult loginResult = mockMvc.perform(post("/login")
                .param("username", ugnichName)
                .param("password", ugnichPassword)).andReturn();
        mockMvc.perform(post("/post")
                .cookie(loginResult.getResponse().getCookies())
                .param("wrong_param", "yo")).andExpect(status().isBadRequest());
        mockMvc.perform(post("/post")
                .cookie(loginResult.getResponse().getCookies())
                .param("body", "yo")).andExpect(status().isOk());
        mockMvc.perform(post("/post")
                .cookie(loginResult.getResponse().getCookies())
                .param("img", "http://static.juick.com/settings/facebook.png")).andExpect(status().isOk());
        mockMvc.perform(post("/post")
                .cookie(loginResult.getResponse().getCookies())
                .param("img", "bad_url")).andExpect(status().isBadRequest());
        FileInputStream fi = new FileInputStream(new ClassPathResource("tagscloud.png").getFile());
        MockMultipartFile file = new MockMultipartFile("attach", fi);
        mockMvc.perform(multipart("/post")
                .file(file)
                .cookie(loginResult.getResponse().getCookies())).andExpect(status().isOk());
        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)));
    }
    @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());
    }
}