diff --git a/README.md b/README.md
index c33761fd7..af385c5e3 100644
--- a/README.md
+++ b/README.md
@@ -35,3 +35,6 @@ Install Prettier Extention and use this [VSCode settings](https://mate-academy.g
 1. Implement comment deletion
     - Delete the commnet immediately not waiting for the server response to improve the UX.
 1. (*) Handle `Add` and `Delete` errors so the user can retry
+
+
+[DEMO LINK](https://Vasyl-Zhyliakov.github.io/react_dynamic-list-of-posts/)
\ No newline at end of file
diff --git a/src/App.tsx b/src/App.tsx
index 017957182..757768c33 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,4 +1,5 @@
 import classNames from 'classnames';
+import { useEffect, useMemo, useState } from 'react';
 
 import 'bulma/css/bulma.css';
 import '@fortawesome/fontawesome-free/css/all.css';
@@ -8,53 +9,139 @@ import { PostsList } from './components/PostsList';
 import { PostDetails } from './components/PostDetails';
 import { UserSelector } from './components/UserSelector';
 import { Loader } from './components/Loader';
+import { User } from './types/User';
+import { getUsersFromServer } from './api/users';
+import { Post } from './types/Post';
+import { getPostsFromServer } from './api/posts';
 
-export const App = () => (
-  <main className="section">
-    <div className="container">
-      <div className="tile is-ancestor">
-        <div className="tile is-parent">
-          <div className="tile is-child box is-success">
-            <div className="block">
-              <UserSelector />
-            </div>
+export const App = () => {
+  const [isDropDownOpen, setIsDropDownOpen] = useState(false);
+  const [users, setUsers] = useState<User[]>([]);
+  const [selectedUserId, setSelectedUserId] = useState<number | null>(null);
+  const [isLoading, setIsLoading] = useState(false);
+  const [posts, setPosts] = useState<Post[]>([]);
+  const [errorMessage, setErrorMessage] = useState('');
+  const [notificationMessage, setNotificationMessage] = useState('');
+  const [activePostId, setActivePostId] = useState<number | null>(null);
 
-            <div className="block" data-cy="MainContent">
-              <p data-cy="NoSelectedUser">No user selected</p>
+  useEffect(() => {
+    getUsersFromServer()
+      .then(setUsers)
+      .catch(() => {});
+  }, []);
 
-              <Loader />
+  useEffect(() => {
+    if (selectedUserId) {
+      setIsLoading(true);
+      setPosts([]);
+      setErrorMessage('');
+      setNotificationMessage('');
+      setActivePostId(null);
+
+      getPostsFromServer(selectedUserId)
+        .then(fetchPosts => {
+          setPosts(fetchPosts);
+          if (fetchPosts.length === 0) {
+            setNotificationMessage('No posts yet');
+          }
+        })
+        .catch(() => {
+          setErrorMessage('Something went wrong!');
+        })
+        .finally(() => {
+          setIsLoading(false);
+        });
+    }
+  }, [selectedUserId]);
+
+  const activePost = useMemo(() => {
+    if (activePostId) {
+      return posts.find(post => post.id === activePostId);
+    }
+
+    return null;
+  }, [activePostId, posts]);
+  
+  useEffect(() => {
+    const handleClickOutside = () => {
+      setIsDropDownOpen(false);
+    };
+
+    document.addEventListener('click', handleClickOutside);
+
+    return () => {
+      document.removeEventListener('click', handleClickOutside);
+    };
+  }, []);
 
-              <div
-                className="notification is-danger"
-                data-cy="PostsLoadingError"
-              >
-                Something went wrong!
-              </div>
 
-              <div className="notification is-warning" data-cy="NoPostsYet">
-                No posts yet
+  return (
+    <main className="section">
+      <div className="container">
+        <div className="tile is-ancestor">
+          <div className="tile is-parent">
+            <div className="tile is-child box is-success">
+              <div className="block">
+                <UserSelector
+                  isDropDownOpen={isDropDownOpen}
+                  users={users}
+                  setSelectedUserId={setSelectedUserId}
+                  selectedUserId={selectedUserId}
+                  setIsDropDownOpen={setIsDropDownOpen}
+                />
               </div>
 
-              <PostsList />
+              <div className="block" data-cy="MainContent">
+                {!selectedUserId && (
+                  <p data-cy="NoSelectedUser">No user selected</p>
+                )}
+
+                {isLoading && <Loader />}
+
+                {errorMessage && !isLoading && (
+                  <div
+                    className="notification is-danger"
+                    data-cy="PostsLoadingError"
+                  >
+                    {errorMessage}
+                  </div>
+                )}
+
+                {notificationMessage && !isLoading && !errorMessage && (
+                  <div className="notification is-warning" data-cy="NoPostsYet">
+                    {notificationMessage}
+                  </div>
+                )}
+
+                {posts.length > 0 && (
+                  <PostsList
+                    posts={posts}
+                    activePostId={activePostId}
+                    setActivePostId={setActivePostId}
+                  />
+                )}
+              </div>
             </div>
           </div>
-        </div>
 
-        <div
-          data-cy="Sidebar"
-          className={classNames(
-            'tile',
-            'is-parent',
-            'is-8-desktop',
-            'Sidebar',
-            'Sidebar--open',
-          )}
-        >
-          <div className="tile is-child box is-success ">
-            <PostDetails />
+          <div
+            data-cy="Sidebar"
+            className={classNames(
+              'tile',
+              'is-parent',
+              'is-8-desktop',
+              'Sidebar',
+              { 'Sidebar--open': activePostId },
+            )}
+          >
+            {activePost && (
+              <div className="tile is-child box is-success ">
+                <PostDetails activePost={activePost} />
+              </div>
+            )}
           </div>
         </div>
       </div>
-    </div>
-  </main>
-);
+    </main>
+  );
+};
diff --git a/src/api/comments.ts b/src/api/comments.ts
new file mode 100644
index 000000000..d5e06897e
--- /dev/null
+++ b/src/api/comments.ts
@@ -0,0 +1,21 @@
+import { Comment } from '../types/Comment';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 1549;
+
+export const getCommentsFromServer = (postId: number) => {
+  return client.get<Comment[]>(`/comments?postId=${postId}`);
+};
+
+export const deleteComment = (commentId: number) => {
+  return client.delete(`/comments/${commentId}`);
+};
+
+export const createComment = ({
+  postId,
+  name,
+  email,
+  body,
+}: Omit<Comment, 'id'>) => {
+  return client.post<Comment>('/comments', { postId, name, email, body });
+};
diff --git a/src/api/posts.ts b/src/api/posts.ts
new file mode 100644
index 000000000..7fb06f91e
--- /dev/null
+++ b/src/api/posts.ts
@@ -0,0 +1,6 @@
+import { Post } from '../types/Post';
+import { client } from '../utils/fetchClient';
+
+export const getPostsFromServer = (userId: number) => {
+  return client.get<Post[]>(`/posts?userId=${userId}`);
+};
diff --git a/src/api/users.ts b/src/api/users.ts
new file mode 100644
index 000000000..32cdfcae8
--- /dev/null
+++ b/src/api/users.ts
@@ -0,0 +1,6 @@
+import { User } from '../types/User';
+import { client } from '../utils/fetchClient';
+
+export const getUsersFromServer = () => {
+  return client.get<User[]>(`/users`);
+};
diff --git a/src/components/NewCommentForm.tsx b/src/components/NewCommentForm.tsx
index 73a8a0b45..a2edea2c6 100644
--- a/src/components/NewCommentForm.tsx
+++ b/src/components/NewCommentForm.tsx
@@ -1,8 +1,90 @@
-import React from 'react';
+import React, { useState, Dispatch, SetStateAction } from 'react';
+import cn from 'classnames';
+import { Comment } from '../types/Comment';
+import { createComment } from '../api/comments';
+
+type Props = {
+  setComments: Dispatch<SetStateAction<Comment[]>>;
+  activePostId: number;
+  setErrorMessage: (m: string) => void;
+};
+
+export const NewCommentForm: React.FC<Props> = ({
+  setComments,
+  activePostId,
+  setErrorMessage,
+}) => {
+  const [isLoading, setIsLoading] = useState(false);
+  const [commentName, setCommentName] = useState('');
+  const [isNameHasError, setIsNameHasError] = useState(false);
+  const [commentEmail, setCommentEmail] = useState('');
+  const [isEmailHasError, setIsEmailHasError] = useState(false);
+  const [commentBody, setCommentBody] = useState('');
+  const [isBodyHasError, setIsBodyHasError] = useState(false);
+
+  const handleNameChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setIsNameHasError(false);
+    setCommentName(event.target.value);
+  };
+
+  const handleEmailChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setIsEmailHasError(false);
+    setCommentEmail(event.target.value);
+  };
+
+  const handleBodyChange = (event: React.ChangeEvent<HTMLTextAreaElement>) => {
+    setIsBodyHasError(false);
+    setCommentBody(event.target.value);
+  };
+
+  function addComment({ postId, name, email, body }: Omit<Comment, 'id'>) {
+    setIsLoading(true);
+
+    createComment({ postId, name, email, body })
+      .then(newComment => {
+        setComments(currentComments => [...currentComments, newComment]);
+      })
+      .catch(() => setErrorMessage('Something went wrong'))
+      .finally(() => {
+        setIsLoading(false);
+        setCommentBody('');
+      });
+  }
+
+  const handleSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+
+    setIsNameHasError(!commentName.trim());
+    setIsEmailHasError(!commentEmail.trim());
+    setIsBodyHasError(!commentBody.trim());
+
+    if (!commentName.trim() || !commentEmail.trim() || !commentBody.trim()) {
+      return;
+    }
+
+    addComment({
+      postId: activePostId,
+      name: commentName,
+      email: commentEmail,
+      body: commentBody,
+    });
+  };
+
+  const handleReset = () => {
+    setCommentName('');
+    setCommentBody('');
+    setCommentEmail('');
+    setIsNameHasError(false);
+    setIsEmailHasError(false);
+    setIsBodyHasError(false);
+  };
 
-export const NewCommentForm: React.FC = () => {
   return (
-    <form data-cy="NewCommentForm">
+    <form
+      data-cy="NewCommentForm"
+      onSubmit={handleSubmit}
+      onReset={handleReset}
+    >
       <div className="field" data-cy="NameField">
         <label className="label" htmlFor="comment-author-name">
           Author Name
@@ -14,24 +96,30 @@ export const NewCommentForm: React.FC = () => {
             name="name"
             id="comment-author-name"
             placeholder="Name Surname"
-            className="input is-danger"
+            className={cn('input', { 'is-danger': isNameHasError })}
+            value={commentName}
+            onChange={handleNameChange}
           />
 
           <span className="icon is-small is-left">
             <i className="fas fa-user" />
           </span>
 
-          <span
-            className="icon is-small is-right has-text-danger"
-            data-cy="ErrorIcon"
-          >
-            <i className="fas fa-exclamation-triangle" />
-          </span>
+          {isNameHasError && (
+            <span
+              className="icon is-small is-right has-text-danger"
+              data-cy="ErrorIcon"
+            >
+              <i className="fas fa-exclamation-triangle" />
+            </span>
+          )}
         </div>
 
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Name is required
-        </p>
+        {isNameHasError && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            Name is required
+          </p>
+        )}
       </div>
 
       <div className="field" data-cy="EmailField">
@@ -45,24 +133,30 @@ export const NewCommentForm: React.FC = () => {
             name="email"
             id="comment-author-email"
             placeholder="email@test.com"
-            className="input is-danger"
+            className={cn('input', { 'is-danger': isEmailHasError })}
+            value={commentEmail}
+            onChange={handleEmailChange}
           />
 
           <span className="icon is-small is-left">
             <i className="fas fa-envelope" />
           </span>
 
-          <span
-            className="icon is-small is-right has-text-danger"
-            data-cy="ErrorIcon"
-          >
-            <i className="fas fa-exclamation-triangle" />
-          </span>
+          {isEmailHasError && (
+            <span
+              className="icon is-small is-right has-text-danger"
+              data-cy="ErrorIcon"
+            >
+              <i className="fas fa-exclamation-triangle" />
+            </span>
+          )}
         </div>
 
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Email is required
-        </p>
+        {isEmailHasError && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            Email is required
+          </p>
+        )}
       </div>
 
       <div className="field" data-cy="BodyField">
@@ -75,18 +169,25 @@ export const NewCommentForm: React.FC = () => {
             id="comment-body"
             name="body"
             placeholder="Type comment here"
-            className="textarea is-danger"
+            className={cn('textarea', { 'is-danger': isBodyHasError })}
+            value={commentBody}
+            onChange={handleBodyChange}
           />
         </div>
 
-        <p className="help is-danger" data-cy="ErrorMessage">
-          Enter some text
-        </p>
+        {isBodyHasError && (
+          <p className="help is-danger" data-cy="ErrorMessage">
+            Enter some text
+          </p>
+        )}
       </div>
 
       <div className="field is-grouped">
         <div className="control">
-          <button type="submit" className="button is-link is-loading">
+          <button
+            type="submit"
+            className={cn('button is-link ', { 'is-loading': isLoading })}
+          >
             Add
           </button>
         </div>
diff --git a/src/components/OnePost.tsx b/src/components/OnePost.tsx
new file mode 100644
index 000000000..5ac11440d
--- /dev/null
+++ b/src/components/OnePost.tsx
@@ -0,0 +1,45 @@
+import React from 'react';
+import cn from 'classnames';
+
+import { Post } from '../types/Post';
+
+type Props = {
+  post: Post;
+  activePostId: number | null;
+  setActivePostId: (param: number | null) => void;
+};
+
+export const OnePost: React.FC<Props> = ({
+  post,
+  activePostId,
+  setActivePostId,
+}) => {
+  const handleOpenPost = (currentPostId: number | null) => {
+    if (activePostId === currentPostId) {
+      setActivePostId(null);
+    } else {
+      setActivePostId(currentPostId);
+    }
+  };
+
+  return (
+    <tr data-cy="Post">
+      <td data-cy="PostId">{post.id}</td>
+
+      <td data-cy="PostTitle">{post.title}</td>
+
+      <td className="has-text-right is-vcentered">
+        <button
+          type="button"
+          data-cy="PostButton"
+          className={cn('button is-link', {
+            'is-light': activePostId !== post.id,
+          })}
+          onClick={() => handleOpenPost(post.id)}
+        >
+          {activePostId === post.id ? 'Close' : 'Open'}
+        </button>
+      </td>
+    </tr>
+  );
+};
diff --git a/src/components/OneUser.tsx b/src/components/OneUser.tsx
new file mode 100644
index 000000000..ec68fdedc
--- /dev/null
+++ b/src/components/OneUser.tsx
@@ -0,0 +1,33 @@
+import { User } from '../types/User';
+import cn from 'classnames';
+
+type Props = {
+  user: User;
+  selectedUserId: number | null;
+  setSelectedUserId: (id: number | null) => void;
+  setIsDropDownOpen: (status: boolean) => void;
+};
+
+export const OneUser: React.FC<Props> = ({
+  user,
+  selectedUserId,
+  setSelectedUserId,
+  setIsDropDownOpen,
+}) => {
+  const handleUserSelect = () => {
+    setSelectedUserId(user.id);
+    setIsDropDownOpen(false);
+  };
+
+  return (
+    <a
+      href={`#user-${user.id}`}
+      className={cn('dropdown-item', {
+        'is-active': selectedUserId === user.id,
+      })}
+      onClick={handleUserSelect}
+    >
+      {user.name}
+    </a>
+  );
+};
diff --git a/src/components/PostDetails.tsx b/src/components/PostDetails.tsx
index 2f82db916..e17ae49b6 100644
--- a/src/components/PostDetails.tsx
+++ b/src/components/PostDetails.tsx
@@ -1,106 +1,123 @@
-import React from 'react';
+import React, { useState, useEffect } from 'react';
 import { Loader } from './Loader';
 import { NewCommentForm } from './NewCommentForm';
+import { Post } from '../types/Post';
+import { Comment } from '../types/Comment';
+import { deleteComment, getCommentsFromServer } from '../api/comments';
+
+type Props = {
+  activePost: Post;
+};
+
+export const PostDetails: React.FC<Props> = ({ activePost }) => {
+  const [comments, setComments] = useState<Comment[]>([]);
+  const [errorMessage, setErrorMessage] = useState('');
+  const [isLoading, setIsLoading] = useState(false);
+  const [isFormOpen, setIsFormOpen] = useState(false);
+
+  const handleCommentDelete = (id: number) => {
+    setComments(currentComments =>
+      currentComments.filter(comment => comment.id !== id),
+    );
+
+    deleteComment(id);
+  };
+
+  useEffect(() => {
+    setErrorMessage('');
+    setIsFormOpen(false);
+    setIsLoading(true);
+
+    getCommentsFromServer(activePost.id)
+      .then(p => {
+        setComments(p);
+      })
+      .catch(() => {
+        setErrorMessage('Something went wrong');
+      })
+      .finally(() => {
+        setIsLoading(false);
+      });
+  }, [activePost]);
 
-export const PostDetails: React.FC = () => {
   return (
     <div className="content" data-cy="PostDetails">
       <div className="content" data-cy="PostDetails">
         <div className="block">
           <h2 data-cy="PostTitle">
-            #18: voluptate et itaque vero tempora molestiae
+            {`#${activePost.id}: ${activePost.title}`}
           </h2>
 
-          <p data-cy="PostBody">
-            eveniet quo quis laborum totam consequatur non dolor ut et est
-            repudiandae est voluptatem vel debitis et magnam
-          </p>
+          <p data-cy="PostBody">{activePost.body}</p>
         </div>
 
         <div className="block">
-          <Loader />
-
-          <div className="notification is-danger" data-cy="CommentsError">
-            Something went wrong
-          </div>
-
-          <p className="title is-4" data-cy="NoCommentsMessage">
-            No comments yet
-          </p>
-
-          <p className="title is-4">Comments:</p>
-
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
-            </div>
+          {isLoading && !errorMessage && <Loader />}
 
-            <div className="message-body" data-cy="CommentBody">
-              Some comment
-            </div>
-          </article>
-
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
-
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
-            </div>
-            <div className="message-body" data-cy="CommentBody">
-              One more comment
-            </div>
-          </article>
-
-          <article className="message is-small" data-cy="Comment">
-            <div className="message-header">
-              <a href="mailto:misha@mate.academy" data-cy="CommentAuthor">
-                Misha Hrynko
-              </a>
-
-              <button
-                data-cy="CommentDelete"
-                type="button"
-                className="delete is-small"
-                aria-label="delete"
-              >
-                delete button
-              </button>
+          {!isLoading && errorMessage && (
+            <div className="notification is-danger" data-cy="CommentsError">
+              {errorMessage}
             </div>
+          )}
 
-            <div className="message-body" data-cy="CommentBody">
-              {'Multi\nline\ncomment'}
-            </div>
-          </article>
-
-          <button
-            data-cy="WriteCommentButton"
-            type="button"
-            className="button is-link"
-          >
-            Write a comment
-          </button>
+          {comments.length === 0 && !errorMessage && !isLoading && (
+            <p className="title is-4" data-cy="NoCommentsMessage">
+              No comments yet
+            </p>
+          )}
+
+          {comments.length > 0 && !isLoading && (
+            <>
+              <p className="title is-4">Comments:</p>
+
+              {comments.map(comment => (
+                <article
+                  className="message is-small"
+                  data-cy="Comment"
+                  key={comment.id}
+                >
+                  <div className="message-header">
+                    <a href={`mailto:${comment.email}`} data-cy="CommentAuthor">
+                      {comment.name}
+                    </a>
+                    <button
+                      data-cy="CommentDelete"
+                      type="button"
+                      className="delete is-small"
+                      aria-label="delete"
+                      onClick={() => handleCommentDelete(comment.id)}
+                    >
+                      delete button
+                    </button>
+                  </div>
+
+                  <div className="message-body" data-cy="CommentBody">
+                    {comment.body}
+                  </div>
+                </article>
+              ))}
+            </>
+          )}
+
+          {!isFormOpen && !errorMessage && !isLoading && (
+            <button
+              data-cy="WriteCommentButton"
+              type="button"
+              className="button is-link"
+              onClick={() => setIsFormOpen(true)}
+            >
+              Write a comment
+            </button>
+          )}
         </div>
 
-        <NewCommentForm />
+        {isFormOpen && (
+          <NewCommentForm
+            setComments={setComments}
+            activePostId={activePost.id}
+            setErrorMessage={setErrorMessage}
+          />
+        )}
       </div>
     </div>
   );
diff --git a/src/components/PostsList.tsx b/src/components/PostsList.tsx
index cf90f04b0..7f6233467 100644
--- a/src/components/PostsList.tsx
+++ b/src/components/PostsList.tsx
@@ -1,10 +1,22 @@
 import React from 'react';
-
-export const PostsList: React.FC = () => (
+import { Post } from '../types/Post';
+import { OnePost } from './OnePost';
+
+type Props = {
+  posts: Post[];
+  activePostId: number | null;
+  setActivePostId: (param: number | null) => void;
+};
+
+export const PostsList: React.FC<Props> = ({
+  posts,
+  activePostId,
+  setActivePostId,
+}) => (
   <div data-cy="PostsList">
     <p className="title">Posts:</p>
 
-    <table className="table is-fullwidth is-striped is-hoverable is-narrow">
+    <table className="table is-striped is-hoverable is-narrow is-fullwidth">
       <thead>
         <tr className="has-background-link-light">
           <th>#</th>
@@ -15,71 +27,14 @@ export const PostsList: React.FC = () => (
       </thead>
 
       <tbody>
-        <tr data-cy="Post">
-          <td data-cy="PostId">17</td>
-
-          <td data-cy="PostTitle">
-            fugit voluptas sed molestias voluptatem provident
-          </td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
-
-        <tr data-cy="Post">
-          <td data-cy="PostId">18</td>
-
-          <td data-cy="PostTitle">
-            voluptate et itaque vero tempora molestiae
-          </td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link"
-            >
-              Close
-            </button>
-          </td>
-        </tr>
-
-        <tr data-cy="Post">
-          <td data-cy="PostId">19</td>
-          <td data-cy="PostTitle">adipisci placeat illum aut reiciendis qui</td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
-
-        <tr data-cy="Post">
-          <td data-cy="PostId">20</td>
-          <td data-cy="PostTitle">doloribus ad provident suscipit at</td>
-
-          <td className="has-text-right is-vcentered">
-            <button
-              type="button"
-              data-cy="PostButton"
-              className="button is-link is-light"
-            >
-              Open
-            </button>
-          </td>
-        </tr>
+        {posts.map(post => (
+          <OnePost
+            key={post.id}
+            post={post}
+            activePostId={activePostId}
+            setActivePostId={setActivePostId}
+          />
+        ))}
       </tbody>
     </table>
   </div>
diff --git a/src/components/UserSelector.tsx b/src/components/UserSelector.tsx
index c89442841..cc3b4de49 100644
--- a/src/components/UserSelector.tsx
+++ b/src/components/UserSelector.tsx
@@ -1,16 +1,46 @@
-import React from 'react';
+import cn from 'classnames';
+
+import { User } from '../types/User';
+import { OneUser } from './OneUser';
+
+type Props = {
+  users: User[];
+  setSelectedUserId: (id: number | null) => void;
+  selectedUserId: number | null;
+  isDropDownOpen: boolean;
+  setIsDropDownOpen: (status: boolean) => void;
+};
+
+export const UserSelector: React.FC<Props> = ({
+  isDropDownOpen,
+  setIsDropDownOpen,
+  users,
+  setSelectedUserId,
+  selectedUserId,
+}) => {
+  
+
+  const activeUser = users.find(user => user.id === selectedUserId);
 
-export const UserSelector: React.FC = () => {
   return (
-    <div data-cy="UserSelector" className="dropdown is-active">
+    <div
+      data-cy="UserSelector"
+      className={cn('dropdown', { 'is-active': isDropDownOpen })}
+      onClick={(event) => event.stopPropagation()}
+    >
       <div className="dropdown-trigger">
         <button
           type="button"
           className="button"
           aria-haspopup="true"
           aria-controls="dropdown-menu"
+          onClick={() => setIsDropDownOpen(!isDropDownOpen)}
         >
-          <span>Choose a user</span>
+          {activeUser?.name ? (
+            <span>{activeUser.name}</span>
+          ) : (
+            <span>Choose a user</span>
+          )}
 
           <span className="icon is-small">
             <i className="fas fa-angle-down" aria-hidden="true" />
@@ -20,21 +50,15 @@ export const UserSelector: React.FC = () => {
 
       <div className="dropdown-menu" id="dropdown-menu" role="menu">
         <div className="dropdown-content">
-          <a href="#user-1" className="dropdown-item">
-            Leanne Graham
-          </a>
-          <a href="#user-2" className="dropdown-item is-active">
-            Ervin Howell
-          </a>
-          <a href="#user-3" className="dropdown-item">
-            Clementine Bauch
-          </a>
-          <a href="#user-4" className="dropdown-item">
-            Patricia Lebsack
-          </a>
-          <a href="#user-5" className="dropdown-item">
-            Chelsey Dietrich
-          </a>
+          {users.map(user => (
+            <OneUser
+              user={user}
+              key={user.id}
+              selectedUserId={selectedUserId}
+              setSelectedUserId={setSelectedUserId}
+              setIsDropDownOpen={setIsDropDownOpen}
+            />
+          ))}
         </div>
       </div>
     </div>