Fix some issues for page, Change design to light page

@@ -4,12 +4,16 @@ import { SERVER_BASE_URL } from '..';
 
 // login request to the server with axios and next-auth
 export const login = async (email, password) => {
-    const response = await axios.post(`${SERVER_BASE_URL}/auth/signin` , {
+    const response = await axios.post(`${SERVER_BASE_URL}/auth/signin`, {
         email,
         password,
+    }).catch(err => {
+        if (err.response.status === 400 || err.response.status === 401) {
+            throw alert('Invalid email or password');
+        }
     });
-    if (response.status !== 200 && response.status !== 201) {
-        throw new Error('Login failed!');
+    if (response == undefined || (response.status !== 200 && response.status !== 201)) {
+        throw alert('Login failed!');
     }
     console.log(response.data.access_token)
     useSession.accessToken = response.data.access_token;
@@ -22,15 +26,20 @@ export const signup = async (name, email, password) => {
         name,
         email,
         password,
+    }).catch(err => {
+        if (err.response.status === 400 || err.response.status === 401) {
+            throw alert('Signup failed, maybe email is already used');
+        }
     });
     if (response.status !== 200 && response.status !== 201) {
-        throw new Error('Signup failed!');
+        throw alert('Signup failed!');
     }
     useSession.accessToken = response.data.access_token;
     return response.data;
 }
 
-export const logout = async () => {1
+export const logout = async () => {
+    1
     useSession.accessToken = null;
     return true;
 }
@@ -60,6 +69,8 @@ export const validateToken = async () => {
     console.log(useSession.accessToken);
     const response = await axios.post(`${SERVER_BASE_URL}/auth/validate`, {
         token: useSession.accessToken,
+    }).catch(err => {
+        throw false;
     });
     if (response.status !== 200 && response.status !== 201) {
         return false;

 import * as auth from '../auth'
 import axios from 'axios';
 import { SERVER_BASE_URL } from '..';
+import { useSession } from 'next-auth/client';
 
 export const newPost = async (
     title,
@@ -56,4 +57,15 @@ export const getPostsByDifficulty = async (difficulty) => {
     }
     console.log(response.data);
     return response.data;
+}
+
+export const createComment = async (id, content) => {
+    const response = await axios.post(`${SERVER_BASE_URL}/post/comment/${id}`, {
+        token : useSession.accessToken,
+        content,
+    });
+    if (response.status !== 200 && response.status !== 201) {
+        throw new Error('Failed to create comment!');
+    }
+    return response.data;
 }
\ No newline at end of file

@@ -14,7 +14,7 @@ import Link from "next/link"
 function Header() {
 
     return (
-        <header className="flex flex-col sm:flex-row m-5 justify-between items-center">
+        <header className="flex flex-col sm:flex-row m-5 mt-0 pt-5 justify-between items-center">
             <Link href="/" passHref>
                 <div className="flex cursor-pointer transform hover:scale-105">
                     <CubeIcon className="h-20" />

@@ -3,7 +3,7 @@ import Link from "next/link"
 function HeaderItem({ Icon, title, link }) {
     return (
         <Link href={link}>
-            <div className="flex flex-col items-center cursor-pointer group w-12 sm:w-20 hover:text-white">
+            <div className="flex flex-col items-center cursor-pointer group w-12 sm:w-20 hover:text-black">
                 <Icon className="h-8 mb-1 group-hover:animate-bounce" />
                 <p className="opacity-0 group-hover:opacity-100 tracking-widest">{title}</p>
             </div>

@@ -25,20 +25,20 @@ export default function Nav() {
             <div className="flex px-10 sm:px-20 text-2xl whitespace-nowrap
             space-x-10 sm:space-x-20">
                 <Button onClick={moverun} className="cursor-pointer transition
-                        duration-100 transform hover:scale-125 hover:text-white
-                        active:text-blue-500">테스트</Button>
+                        duration-100 transform hover:scale-125 hover:text-black
+                        active:text-white">테스트</Button>
                 <Button onClick={movelow} className="cursor-pointer transition
-                        duration-100 transform hover:scale-125 hover:text-white
-                        active:text-blue-500">난이도 하</Button>
+                        duration-100 transform hover:scale-125 hover:text-black
+                        active:text-white">난이도 하</Button>
                 <Button onClick={movemed} className="cursor-pointer transition
-                        duration-100 transform hover:scale-125 hover:text-white
-                        active:text-blue-500">난이도 중</Button>
+                        duration-100 transform hover:scale-125 hover:text-black
+                        active:text-white">난이도 중</Button>
                 <Button onClick={movehigh} className="cursor-pointer transition
-                        duration-100 transform hover:scale-125 hover:text-white
-                        active:text-blue-500">난이도 상</Button>
+                        duration-100 transform hover:scale-125 hover:text-black
+                        active:text-white">난이도 상</Button>
                 <Button onClick={movenew} className="cursor-pointer transition
-                        duration-100 transform hover:scale-125 hover:text-white
-                        active:text-blue-500">문제 만들기</Button>
+                        duration-100 transform hover:scale-125 hover:text-black
+                        active:text-white">문제 만들기</Button>
             </div>
         </nav>
     )

@@ -6,11 +6,13 @@ import Footer from '../components/Footer'
 function MyApp({ Component, pageProps }) {
   return (
     <div>
-      <div className="main">
-        <Header />
-        <Nav />
+      <div className="min-h-screen">
+        <div className="main bg-neutral pb-4 border-b-4 border-carbon">
+          <Header />
+          <Nav />
+        </div>
+        <Component {...pageProps} />
       </div>
-      <Component {...pageProps} />
       <Footer />
     </div>
   )

 import { useRouter } from "next/router";
+import { Button } from "semantic-ui-react";
 import * as auth from "../api/auth";
 
 export default function Login() {
     const router = useRouter();
 
     return (
-        <div>
-            <h1>Login</h1>
-            <form onSubmit={handleSubmit}>
-                <label htmlFor="email">Email</label>
-                <input type="email" id="email" />
-                <label htmlFor="password">Password</label>
-                <input type="password" id="password" />
-                <button type="submit">Login</button>
-            </form>
+        <div className="flex h-auto">
+            <div className="w-auto inline-block p-3 bg-black rounded-lg m-auto">
+                <h1 className="font-bold text-4xl text-center">로그인</h1>
+                <form onSubmit={handleSubmit}>
+                    <input type="email" id="email" placeholder="email" className="my-2 rounded-sm"/>
+                    <br />
+                    <input type="password" id="password" className="my-2 rounded-sm" placeholder="password" />
+                    <br />
+                    <button type="submit" className="mt-2 px-4 py-2 text-base font-semibold text-white transition duration-500 transform bg-blue-300 rounded-lg hover:shadow-lg focus:bg-blue-400 focus:outline-none focus:ring-2 focus:ring-blue-300 focus:ring-offset-2 focus:ring-offset-blue-300 motion-reduce:transform-none hover:scale-105 tramsform">Login</button>
+                </form>
+            </div>
         </div>
     );
 
@@ -23,7 +26,7 @@ export default function Login() {
         const email = form.email.value;
         const password = form.password.value;
         const login = await auth.login(email, password);
-        if(!login) {
+        if (!login) {
             alert("Login failed");
         }
         else {

 import { Button } from "semantic-ui-react";
 import { newPost } from "../api/post";
+import React from "react";
+import dynamic from "next/dynamic";
+import "@uiw/react-textarea-code-editor/dist.css";
+
+const CodeEditor = dynamic(
+    () => import("@uiw/react-textarea-code-editor").then((mod) => mod.default),
+    { ssr: false }
+);
 
 export default function New() {
+    const [code, setCode] = React.useState("");
+
     async function makePost(event) {
         event.preventDefault();
         const form = event.target;
         const title = form.title.value;
         const explain = form.explain.value;
-        const example = form.example.value;
+        const example = code;
         const testinput = form.testinput.value.split("\n");
         const testoutput = form.testoutput.value.split("\n");
         const difficulty = form.level.value;
@@ -27,8 +37,20 @@ export default function New() {
                 </select>
                 <label>문제 설명</label>
                 <textarea id="explain"></textarea><br />
-                <label>예시 코드</label>
-                <textarea id="example"></textarea><br />
+                <label>예시 코드 (C++언어로 작성해야 합니다.)</label>
+                <CodeEditor
+                    value={code}
+                    language="cpp"
+                    placeholder="Please enter example code."
+                    onChange={(evn) => setCode(evn.target.value)}
+                    padding={15}
+                    style={{
+                        fontSize: 12,
+                        backgroundColor: "#f5f5f5",
+                        fontFamily:
+                            "ui-monospace,SFMono-Regular,SF Mono,Consolas,Liberation Mono,Menlo,monospace"
+                    }}
+                />
                 <label>예시 입력(Enter로 구분)</label>
                 <textarea id="testinput"></textarea>
                 <label>예시 출력(Enter로 구분)</label>

 import { useRouter } from "next/dist/client/router"
-import { getPostbyId } from "../../api/post"
+import { createComment, getPostbyId } from "../../api/post"
 import "@uiw/react-textarea-code-editor/dist.css";
 import dynamic from "next/dynamic";
 import { useEffect, useState } from "react";
 import { Button } from "semantic-ui-react";
 import { run } from "../../api/runner";
+import { useSession } from "next-auth/client";
+import SyntaxHighlighter from 'react-syntax-highlighter';
 
 const CodeEditor = dynamic(
     () => import("@uiw/react-textarea-code-editor").then((mod) => mod.default),
@@ -20,6 +22,7 @@ export default function Post() {
         if (!router.isReady) return;
         const { id } = router.query
         getPostbyId(id).then(res => {
+            console.log(res);
             setPost(res)
         })
     }, [router.isReady]);
@@ -28,16 +31,45 @@ export default function Post() {
 
     const [code, setCode] = useState("");
 
-    const [answer, setAnswer] = useState("asdf");
+    const [answer, setAnswer] = useState("Answer Test");
+
+    const [comment, setComment] = useState("");
+
+    const addComment = async () => {
+        const { id } = router.query
+        const response = await createComment(id, comment)
+    }
+
+    const displayComment = () => {
+        console.log(post.comments);
+        if (post.comments != undefined) {
+            return post.comments.map(comment => (
+                <div className="w-full">
+                    <div className="w-full flex justify-between">
+                        <div className="w-1/2">
+                            <span className="text-gray-700">{comment.username}</span>
+                        </div>
+                    </div>
+                </div>)
+            )
+        }
+        return <div></div>
+    }
+
 
     const runCode = async function () {
+        if (useSession.accessToken == null) {
+            alert("You need to login first!")
+            router.push("/login")
+            return;
+        }
         var result = await run(code, value);
         console.log(result);
         setAnswer(`출력 : ${result}`);
     }
 
     return (
-        <div>
+        <div className="ml-10 mr-10">
             <h3 className="text-3xl font-bold">{post.title}</h3>
             <p>{post.testinput}</p>
             <p>{post.testoutput}</p>
@@ -49,7 +81,7 @@ export default function Post() {
                 <option value="go">golang</option>
                 <option value="py">python</option>
             </select>
-            <span className="left-100 fixed text-2xl font-semibold">문제 설명</span>
+            <span className="absolute left-1/2 text-2xl font-semibold">문제 설명</span>
             <br></br>
             <div className="w-6/12 inline-block">
                 <CodeEditor
@@ -64,15 +96,24 @@ export default function Post() {
                         fontFamily:
                             "ui-monospace,SFMono-Regular,SF Mono,Consolas,Liberation Mono,Menlo,monospace"
                     }}
-                    className="w-8/12 h-96 rounded"
+                    className="w-8/12 min-h-[24rem] rounded"
 
                 />
             </div>
             <div className="w-6/12 inline-block align-top">{post.explain}</div>
             <Button onClick={runCode} className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded">Run</Button>
             <div className="">{answer}</div>
-            
-            <p>{post.example}</p>
+            <details>
+                <summary>예시 코드 보기</summary>
+                <SyntaxHighlighter language="cpp">
+                    {post.example || "Loading Example..."}
+                </SyntaxHighlighter>
+            </details>
+            <div>
+                <textarea className="w-full h-24" placeholder="Write your comment..." value={comment} onChange={(e) => setComment(e.target.value)}></textarea>
+                <button className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded" onClick={addComment}>댓글 쓰기</button>
+                {displayComment()}
+            </div>
         </div>
     )
 }
\ No newline at end of file

@@ -8,10 +8,16 @@ export default function Signup() {
             <form onSubmit={handleSubmit}>
                 <label htmlFor="name">Name</label>
                 <input type="text" id="name" />
+                <br />
                 <label htmlFor="email">Email</label>
                 <input type="email" id="email" />
+                <br />
                 <label htmlFor="password">Password</label>
                 <input type="password" id="password" />
+                <br />
+                <label htmlFor="password-confirm">Confirm Password</label>
+                <input type="password" id="password-confirm" />
+                <br />
                 <button type="submit">Signup</button>
             </form>
         </div>
@@ -24,7 +30,12 @@ function handleSubmit(event) {
     const name = form.name.value;
     const email = form.email.value;
     const password = form.password.value;
-    console.log(name, email, password);
+    const passwordConfirm = form.passwordConfirm.value;
+    console.log(name, email, password, passwordConfirm);
+    if (password !== passwordConfirm) {
+        alert("Passwords do not match");
+        return;
+    }
     const signup = auth.signup(name, email, password);
     if(!signup) {
         alert("Signup failed");

@@ -4,7 +4,7 @@
 
 @layer base {
   body {
-      @apply bg-[#06202A] text-gray-300
+      @apply bg-neutral text-black;
   }
 }
 
@@ -32,7 +32,7 @@ span.left-100.fixed {
 }
 
 .footer {
-  position: absolute;
+  position: flex;
   bottom: 0;
   left: 0;
 }

@@ -3,7 +3,14 @@ module.exports = {
   purge: ['./src/**/*.{js,ts,jsx,tsx}'],
   darkMode: false, // or 'media' or 'class'
   theme: {
-    extend: {},
+    extend: {
+      colors: {
+        carbon: '#A9A9A9',
+        watermelon: "#ff3b3f",
+        neutral: "#efefef",
+        sky: "#caebf2",
+      },
+    },
   },
   variants: {
     extend: {},