diff --git a/README.md b/README.md
index d3c3756ab9..3303569c99 100644
--- a/README.md
+++ b/README.md
@@ -47,4 +47,4 @@ Implement the ability to edit a todo title on double click:
 
 - Implement a solution following the [React task guideline](https://github.com/mate-academy/react_task-guideline#react-tasks-guideline).
 - Use the [React TypeScript cheat sheet](https://mate-academy.github.io/fe-program/js/extra/react-typescript).
-- Replace `<your_account>` with your Github username in the [DEMO LINK](https://<your_account>.github.io/react_todo-app-with-api/) and add it to the PR description.
+- Replace `<your_account>` with your Github username in the [DEMO LINK](https://imondok03.github.io/react_todo-app-with-api/) and add it to the PR description.
diff --git a/src/App.tsx b/src/App.tsx
index 81e011f432..20858a862c 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,26 +1,164 @@
-/* eslint-disable max-len */
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useEffect, useMemo, useState } from 'react';
+import * as todoService from './api/todos';
 import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import { Todo } from './types/Todo';
+import { Filter } from './types/Filter';
+import { Header } from './components/Header/Header';
+import { TodoList } from './components/TodoList/TodoList';
+import classNames from 'classnames';
+import { Footer } from './components/Footer/Footer';
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [filter, setFilter] = useState<Filter>(Filter.all);
+  const [errorMessage, setErrorMessage] = useState('');
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [todosInProcess, setTodosInProcess] = useState<number[]>([]);
+
+  useEffect(() => {
+    todoService
+      .getTodos()
+      .then(setTodos)
+      .catch(() => {
+        setErrorMessage('Unable to load todos');
+        setTimeout(() => setErrorMessage(''), 3000);
+      });
+  }, []);
+  const addTodo = ({ userId, title, completed }: Omit<Todo, 'id'>) => {
+    setErrorMessage('');
+
+    return todoService
+      .postTodos({ userId, title, completed })
+      .then(newTitle => {
+        setTodos(currentTodo => [...currentTodo, newTitle]);
+      })
+      .catch(error => {
+        setErrorMessage('Unable to add a todo');
+        setTimeout(() => setErrorMessage(''), 3000);
+        throw error;
+      })
+      .finally(() => {
+        setTempTodo(null);
+      });
+  };
+
+  const deleteTodo = (postId: number) => {
+    setTodosInProcess(currentId => [...currentId, postId]);
+
+    return todoService
+      .deleteTodos(postId)
+      .then(() => {
+        setTodos(currentTodo => currentTodo.filter(todo => todo.id !== postId));
+      })
+      .catch(error => {
+        setErrorMessage('Unable to delete a todo');
+        setTimeout(() => setErrorMessage(''), 3000);
+        throw error;
+      })
+      .finally(() => {
+        setTodosInProcess(currentId => currentId.filter(id => id !== postId));
+      });
+  };
+
+  const updateTodo = (
+    todoId: number,
+    newTitle: string,
+    completed?: boolean,
+  ) => {
+    const todoToUpdate = todos.find(todo => todo.id === todoId);
+
+    if (!todoToUpdate) {
+      return;
+    }
+
+    const trimmedTitle = newTitle.trim();
+    const updatedTodo = {
+      ...todoToUpdate,
+      title: trimmedTitle,
+      completed: completed ?? todoToUpdate.completed,
+    };
+
+    setTodosInProcess(currentId => [...currentId, todoId]);
+
+    return todoService
+      .updateTodos(todoId, updatedTodo)
+      .then(() => {
+        setTodos(currentTodos =>
+          currentTodos.map(todo => (todo.id === todoId ? updatedTodo : todo)),
+        );
+      })
+      .catch(error => {
+        setErrorMessage('Unable to update a todo');
+        setTimeout(() => setErrorMessage(''), 3000);
+        throw error;
+      })
+      .finally(() => {
+        setTodosInProcess(currentId => currentId.filter(id => id !== todoId));
+      });
+  };
+
+  const filteredTodos = useMemo(() => {
+    return todos.filter(todo => {
+      if (filter === Filter.active) {
+        return !todo.completed;
+      }
+
+      if (filter === Filter.completed) {
+        return todo.completed;
+      }
+
+      return true;
+    });
+  }, [todos, filter]);
+
+  if (!todoService.USER_ID) {
     return <UserWarning />;
   }
 
   return (
-    <section className="section container">
-      <p className="title is-4">
-        Copy all you need from the prev task:
-        <br />
-        <a href="https://github.com/mate-academy/react_todo-app-add-and-delete#react-todo-app-add-and-delete">
-          React Todo App - Add and Delete
-        </a>
-      </p>
-
-      <p className="subtitle">Styles are already copied</p>
-    </section>
+    <div className="todoapp">
+      <h1 className="todoapp__title">todos</h1>
+      <div className="todoapp__content">
+        <Header
+          todos={todos}
+          onErrorMessage={setErrorMessage}
+          onSubmit={addTodo}
+          setTempTodo={setTempTodo}
+          todosInProcess={todosInProcess}
+          updateTodo={updateTodo}
+          errorMessage={errorMessage}
+        />
+        <TodoList
+          todos={filteredTodos}
+          tempTodo={tempTodo}
+          onDelete={deleteTodo}
+          todosInProcess={todosInProcess}
+          updateTodo={updateTodo}
+        />
+        {!!todos.length && (
+          <Footer
+            todos={todos}
+            onFilter={setFilter}
+            filter={filter}
+            onDelete={deleteTodo}
+          />
+        )}
+      </div>
+      <div
+        data-cy="ErrorNotification"
+        className={classNames(
+          'notification is-danger is-light has-text-weight-normal',
+          { hidden: !errorMessage },
+        )}
+      >
+        <button
+          data-cy="HideErrorButton"
+          type="button"
+          className="delete"
+          onClick={() => setErrorMessage('')}
+        />
+        {errorMessage}
+      </div>
+    </div>
   );
 };
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..7239e4fe09
--- /dev/null
+++ b/src/api/todos.ts
@@ -0,0 +1,20 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 1795;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const postTodos = ({ userId, title, completed }: Omit<Todo, 'id'>) => {
+  return client.post<Todo>('/todos', { userId, title, completed });
+};
+
+export const deleteTodos = (postId: number) => {
+  return client.delete(`/todos/${postId}`);
+};
+
+export const updateTodos = (todoId: number, todo: Todo) => {
+  return client.patch(`/todos/${todoId}`, todo);
+};
diff --git a/src/components/Footer/Footer.tsx b/src/components/Footer/Footer.tsx
new file mode 100644
index 0000000000..a6603acc0b
--- /dev/null
+++ b/src/components/Footer/Footer.tsx
@@ -0,0 +1,59 @@
+import React from 'react';
+import cn from 'classnames';
+import { Filter } from '../../types/Filter';
+import { Todo } from '../../types/Todo';
+
+type Props = {
+  todos: Todo[];
+  onFilter: React.Dispatch<React.SetStateAction<Filter>>;
+  filter: string;
+  onDelete: (postId: number) => Promise<unknown>;
+};
+
+export const Footer: React.FC<Props> = ({
+  todos,
+  onFilter,
+  filter,
+  onDelete,
+}) => {
+  const hasCompletedTodos = todos
+    .filter(todo => todo.completed)
+    .map(todo => todo.id);
+
+  const handleDeleteAllCompleted = (todosId: number[]) => {
+    todosId.map(id => onDelete(id));
+  };
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {todos.filter(todo => !todo.completed).length} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(Filter).map(value => (
+          <a
+            key={value}
+            href={`#/${value}`}
+            className={cn('filter__link', {
+              selected: filter === value,
+            })}
+            data-cy={`FilterLink${value}`}
+            onClick={() => onFilter(value)}
+          >
+            {value}
+          </a>
+        ))}
+      </nav>
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={!hasCompletedTodos.length}
+        onClick={() => handleDeleteAllCompleted(hasCompletedTodos)}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/Header/Header.tsx b/src/components/Header/Header.tsx
new file mode 100644
index 0000000000..213828d688
--- /dev/null
+++ b/src/components/Header/Header.tsx
@@ -0,0 +1,113 @@
+import cn from 'classnames';
+import React, { useEffect, useRef, useState } from 'react';
+import { Todo } from '../../types/Todo';
+import { USER_ID } from '../../api/todos';
+
+type Props = {
+  todos: Todo[];
+  onErrorMessage: React.Dispatch<React.SetStateAction<string>>;
+  onSubmit: ({ userId, title, completed }: Omit<Todo, 'id'>) => Promise<void>;
+  setTempTodo: React.Dispatch<React.SetStateAction<Todo | null>>;
+  todosInProcess: number[];
+  updateTodo: (
+    todoId: number,
+    newTitle: string,
+    completed?: boolean,
+  ) => Promise<void> | undefined;
+  errorMessage: string;
+};
+
+export const Header: React.FC<Props> = ({
+  todos,
+  onErrorMessage,
+  onSubmit,
+  setTempTodo,
+  todosInProcess,
+  updateTodo,
+  errorMessage,
+}) => {
+  const [newTodoTitle, setNewTodoTitle] = useState('');
+  const [isSubmiting, setIsSubmiting] = useState(false);
+  const titleFiled = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (titleFiled.current) {
+      titleFiled.current.focus();
+    }
+  }, [todos, errorMessage]);
+
+  const allChecked = todos.every(todo => todo.completed);
+  const handleNewTodoTitle = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setNewTodoTitle(event.target.value);
+  };
+
+  const handleSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+    const trimmedTitle = newTodoTitle.trim();
+
+    if (!trimmedTitle) {
+      onErrorMessage('Title should not be empty');
+      setTimeout(() => onErrorMessage(''), 3000);
+
+      return;
+    }
+
+    setIsSubmiting(true);
+    setTempTodo({
+      id: 0,
+      title: trimmedTitle,
+      completed: false,
+      userId: USER_ID,
+    });
+    onSubmit({
+      userId: USER_ID,
+      title: trimmedTitle,
+      completed: false,
+    })
+      .then(() => {
+        setNewTodoTitle('');
+      })
+      .finally(() => {
+        setIsSubmiting(false);
+      });
+  };
+
+  const handleToggleAll = () => {
+    const allCompleted = todos.every(todo => todo.completed);
+    const newCompletedStatus = !allCompleted;
+    const todosToUpdate = todos.filter(
+      todo => todo.completed !== newCompletedStatus,
+    );
+
+    todosToUpdate.forEach(todo => {
+      updateTodo(todo.id, todo.title, newCompletedStatus);
+    });
+  };
+
+  const shouldShowToggleAllButton = !!todos.length && !todosInProcess.length;
+
+  return (
+    <header className="todoapp__header">
+      {shouldShowToggleAllButton && (
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', { active: allChecked })}
+          data-cy="ToggleAllButton"
+          onClick={handleToggleAll}
+        />
+      )}
+      <form onSubmit={handleSubmit}>
+        <input
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          ref={titleFiled}
+          disabled={isSubmiting}
+          value={newTodoTitle}
+          onChange={handleNewTodoTitle}
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/TempTodo/TempTodo.tsx b/src/components/TempTodo/TempTodo.tsx
new file mode 100644
index 0000000000..0a4e1278f8
--- /dev/null
+++ b/src/components/TempTodo/TempTodo.tsx
@@ -0,0 +1,37 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+import { Todo } from '../../types/Todo';
+
+type Props = {
+  tempTitle: Todo;
+};
+
+export const TempTodo: React.FC<Props> = ({ tempTitle }) => {
+  return (
+    <div data-cy="Todo" className="todo">
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          disabled
+        />
+      </label>
+
+      <span data-cy="TodoTitle" className="todo__title">
+        {tempTitle.title}
+      </span>
+      <button
+        type="button"
+        className="todo__remove"
+        data-cy="TodoDelete"
+        disabled
+      >
+        ×
+      </button>
+      <div data-cy="TodoLoader" className="modal overlay is-active">
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </div>
+  );
+};
diff --git a/src/components/TodoItem/TodoItem.tsx b/src/components/TodoItem/TodoItem.tsx
new file mode 100644
index 0000000000..b16d3a9db6
--- /dev/null
+++ b/src/components/TodoItem/TodoItem.tsx
@@ -0,0 +1,112 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+import cn from 'classnames';
+import { useState } from 'react';
+import { Todo } from '../../types/Todo';
+
+type Props = {
+  todo: Todo;
+  onDelete: (postId: number) => Promise<unknown>;
+  todosInProcess: number[];
+  updateTodo: (
+    todoId: number,
+    newTitle: string,
+    completed?: boolean,
+  ) => Promise<void> | undefined;
+};
+export const TodoItem: React.FC<Props> = ({
+  todo: { completed, title, id },
+  onDelete,
+  todosInProcess,
+  updateTodo,
+}) => {
+  const [selectTitle, setSelectTitle] = useState(title);
+  const [changeTitle, setChangeTitle] = useState(false);
+  const handleSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+    const trimmedTitle = selectTitle.trim();
+
+    if (trimmedTitle === '') {
+      onDelete(id);
+    } else {
+      setChangeTitle(false);
+      updateTodo(id, trimmedTitle)
+        ?.then(() => {
+          setSelectTitle(trimmedTitle);
+        })
+        .catch(() => {
+          setChangeTitle(true);
+        });
+    }
+  };
+
+  const handleChangeChecked = (event: React.ChangeEvent<HTMLInputElement>) => {
+    updateTodo(id, selectTitle, event.target.checked);
+  };
+
+  const handleDelete = () => {
+    onDelete(id);
+  };
+
+  const handleKeyUp = (event: React.KeyboardEvent) => {
+    if (event.key === 'Escape') {
+      setSelectTitle(title);
+      setChangeTitle(false);
+    }
+  };
+
+  return (
+    <div data-cy="Todo" className={cn('todo', { completed })}>
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={completed}
+          onChange={handleChangeChecked}
+        />
+      </label>
+      {changeTitle ? (
+        <form onSubmit={handleSubmit}>
+          <input
+            data-cy="TodoTitleField"
+            type="text"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            value={selectTitle}
+            autoFocus
+            onBlur={handleSubmit}
+            onKeyUp={handleKeyUp}
+            onChange={event => setSelectTitle(event.target.value)}
+          />
+        </form>
+      ) : (
+        <>
+          <span
+            data-cy="TodoTitle"
+            className="todo__title"
+            onDoubleClick={() => setChangeTitle(true)}
+          >
+            {selectTitle}
+          </span>
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={handleDelete}
+          >
+            ×
+          </button>
+        </>
+      )}
+      <div
+        data-cy="TodoLoader"
+        className={cn('modal overlay', {
+          'is-active': todosInProcess.includes(id),
+        })}
+      >
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </div>
+  );
+};
diff --git a/src/components/TodoList/TodoList.tsx b/src/components/TodoList/TodoList.tsx
new file mode 100644
index 0000000000..2f1a1392f9
--- /dev/null
+++ b/src/components/TodoList/TodoList.tsx
@@ -0,0 +1,38 @@
+import { Todo } from '../../types/Todo';
+import { TempTodo } from '../TempTodo/TempTodo';
+import { TodoItem } from '../TodoItem/TodoItem';
+
+type Props = {
+  todos: Todo[];
+  tempTodo: Todo | null;
+  onDelete: (postId: number) => Promise<unknown>;
+  todosInProcess: number[];
+  updateTodo: (
+    todoId: number,
+    newTitle: string,
+    completed?: boolean,
+  ) => Promise<void> | undefined;
+};
+
+export const TodoList: React.FC<Props> = ({
+  todos,
+  tempTodo,
+  onDelete,
+  todosInProcess,
+  updateTodo,
+}) => {
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      {todos.map(todo => (
+        <TodoItem
+          todo={todo}
+          key={todo.id}
+          onDelete={onDelete}
+          todosInProcess={todosInProcess}
+          updateTodo={updateTodo}
+        />
+      ))}
+      {tempTodo && <TempTodo tempTitle={tempTodo} />}
+    </section>
+  );
+};
diff --git a/src/types/Filter.ts b/src/types/Filter.ts
new file mode 100644
index 0000000000..85382cc6a2
--- /dev/null
+++ b/src/types/Filter.ts
@@ -0,0 +1,5 @@
+export enum Filter {
+  all = 'All',
+  active = 'Active',
+  completed = 'Completed',
+}
diff --git a/src/types/Todo.ts b/src/types/Todo.ts
new file mode 100644
index 0000000000..3f52a5fdde
--- /dev/null
+++ b/src/types/Todo.ts
@@ -0,0 +1,6 @@
+export interface Todo {
+  id: number;
+  userId: number;
+  title: string;
+  completed: boolean;
+}
diff --git a/src/utils/fetchClient.ts b/src/utils/fetchClient.ts
new file mode 100644
index 0000000000..708ac4c17b
--- /dev/null
+++ b/src/utils/fetchClient.ts
@@ -0,0 +1,46 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+const BASE_URL = 'https://mate.academy/students-api';
+
+// returns a promise resolved after a given delay
+function wait(delay: number) {
+  return new Promise(resolve => {
+    setTimeout(resolve, delay);
+  });
+}
+
+// To have autocompletion and avoid mistypes
+type RequestMethod = 'GET' | 'POST' | 'PATCH' | 'DELETE';
+
+function request<T>(
+  url: string,
+  method: RequestMethod = 'GET',
+  data: any = null, // we can send any data to the server
+): Promise<T> {
+  const options: RequestInit = { method };
+
+  if (data) {
+    // We add body and Content-Type only for the requests with data
+    options.body = JSON.stringify(data);
+    options.headers = {
+      'Content-Type': 'application/json; charset=UTF-8',
+    };
+  }
+
+  // DON'T change the delay it is required for tests
+  return wait(100)
+    .then(() => fetch(BASE_URL + url, options))
+    .then(response => {
+      if (!response.ok) {
+        throw new Error();
+      }
+
+      return response.json();
+    });
+}
+
+export const client = {
+  get: <T>(url: string) => request<T>(url),
+  post: <T>(url: string, data: any) => request<T>(url, 'POST', data),
+  patch: <T>(url: string, data: any) => request<T>(url, 'PATCH', data),
+  delete: (url: string) => request(url, 'DELETE'),
+};