diff --git a/src/App.tsx b/src/App.tsx
index a399287bd..c2a0082f8 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,156 +1,35 @@
+//#region lint exception
+/* eslint-disable react-hooks/rules-of-hooks */
+/* eslint-disable jsx-a11y/label-has-associated-control */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+//#endregion
+import React, { useMemo, useState } from 'react';
+import { FilterStatus } from './types/FilterStatus';
+import { getFilteredTodos } from './utils/getFilteredTodos';
+import { Header } from './components/Header';
+import { TodoList } from './components/TodoList/TodoList';
+import { Footer } from './components/Footer/Footer';
+import { useGlobalState } from './context/Store';
 
 export const App: React.FC = () => {
+  const [filter, setFilter] = useState(FilterStatus.All);
+  const todos = useGlobalState();
+
+  const filteredTodos = useMemo(
+    () => getFilteredTodos(todos, filter),
+    [filter, todos],
+  );
+
   return (
     <div className="todoapp">
       <h1 className="todoapp__title">todos</h1>
 
       <div className="todoapp__content">
-        <header className="todoapp__header">
-          {/* this button should have `active` class only if all todos are completed */}
-          <button
-            type="button"
-            className="todoapp__toggle-all active"
-            data-cy="ToggleAllButton"
-          />
-
-          {/* Add a todo on form submit */}
-          <form>
-            <input
-              data-cy="NewTodoField"
-              type="text"
-              className="todoapp__new-todo"
-              placeholder="What needs to be done?"
-            />
-          </form>
-        </header>
-
-        <section className="todoapp__main" data-cy="TodoList">
-          {/* This is a completed todo */}
-          <div data-cy="Todo" className="todo completed">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-                checked
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Completed Todo
-            </span>
-
-            {/* Remove button appears only on hover */}
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* This todo is an active todo */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Not Completed Todo
-            </span>
-
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* This todo is being edited */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            {/* This form is shown instead of the title and remove button */}
-            <form>
-              <input
-                data-cy="TodoTitleField"
-                type="text"
-                className="todo__title-field"
-                placeholder="Empty todo will be deleted"
-                value="Todo is being edited now"
-              />
-            </form>
-          </div>
-
-          {/* This todo is in loadind state */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Todo is being saved now
-            </span>
-
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-        </section>
-
-        {/* Hide the footer if there are no todos */}
-        <footer className="todoapp__footer" data-cy="Footer">
-          <span className="todo-count" data-cy="TodosCounter">
-            3 items left
-          </span>
-
-          {/* Active link should have the 'selected' class */}
-          <nav className="filter" data-cy="Filter">
-            <a
-              href="#/"
-              className="filter__link selected"
-              data-cy="FilterLinkAll"
-            >
-              All
-            </a>
-
-            <a
-              href="#/active"
-              className="filter__link"
-              data-cy="FilterLinkActive"
-            >
-              Active
-            </a>
+        <Header />
 
-            <a
-              href="#/completed"
-              className="filter__link"
-              data-cy="FilterLinkCompleted"
-            >
-              Completed
-            </a>
-          </nav>
+        <TodoList filteredTodos={filteredTodos} />
 
-          {/* this button should be disabled if there are no completed todos */}
-          <button
-            type="button"
-            className="todoapp__clear-completed"
-            data-cy="ClearCompletedButton"
-          >
-            Clear completed
-          </button>
-        </footer>
+        {!!todos.length && <Footer filter={filter} onFilter={setFilter} />}
       </div>
     </div>
   );
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 000000000..8b332f4fa
--- /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 = 968;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const postTodo = (todo: Omit<Todo, 'id'>) => {
+  return client.post<Todo>(`/todos`, todo);
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete<Todo>(`/todos/${todoId}`);
+};
+
+export const patchTodo = (id: number, todoData: Partial<Todo>) => {
+  return client.patch<Todo>(`/todos/${id}`, todoData);
+};
diff --git a/src/components/Footer/Footer.tsx b/src/components/Footer/Footer.tsx
new file mode 100644
index 000000000..619b9ccd0
--- /dev/null
+++ b/src/components/Footer/Footer.tsx
@@ -0,0 +1,61 @@
+import React from 'react';
+import { FilterStatus } from '../../types/FilterStatus';
+import cn from 'classnames';
+import { useDispatch, useGlobalState } from '../../context/Store';
+
+type Props = {
+  filter: FilterStatus;
+  onFilter: (filter: FilterStatus) => void;
+};
+
+export const Footer: React.FC<Props> = ({ filter, onFilter }) => {
+  const todos = useGlobalState();
+  const dispatch = useDispatch();
+
+  const activeTodos = todos.filter(todo => !todo.completed).length;
+
+  const haveCompletedTodos = todos.some(todo => todo.completed);
+
+  const handleClearCompleted = () =>
+    todos
+      .filter(todo => todo.completed)
+      .forEach(todo => dispatch({ type: 'delete', payload: todo.id }));
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {`${activeTodos} items left`}
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(FilterStatus).map(filterStatus => (
+          <a
+            key={filterStatus}
+            href={
+              filterStatus === FilterStatus.All
+                ? '#/'
+                : `#/${filterStatus.toLowerCase()}`
+            }
+            className={cn('filter__link', {
+              selected: filter === filterStatus,
+            })}
+            data-cy={`FilterLink${filterStatus}`}
+            onClick={() => onFilter(filterStatus)}
+          >
+            {filterStatus}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={!haveCompletedTodos}
+        onClick={handleClearCompleted}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/Footer/index.ts b/src/components/Footer/index.ts
new file mode 100644
index 000000000..ddcc5a9cd
--- /dev/null
+++ b/src/components/Footer/index.ts
@@ -0,0 +1 @@
+export * from './Footer';
diff --git a/src/components/Header/Header.tsx b/src/components/Header/Header.tsx
new file mode 100644
index 000000000..09dece5b7
--- /dev/null
+++ b/src/components/Header/Header.tsx
@@ -0,0 +1,85 @@
+import React, { FC, useEffect, useRef, useState } from 'react';
+import cn from 'classnames';
+
+import { useDispatch, useGlobalState } from '../../context/Store';
+
+export const Header: FC = () => {
+  const [title, setTitle] = useState('');
+  const [isSubmitting, setIsSubmiting] = useState(false);
+
+  const todos = useGlobalState();
+  const dispatch = useDispatch();
+
+  const areAllTodosCompleted = todos.every(todo => todo.completed);
+
+  const handleToggleAll = () => {
+    const haveActive = todos.some(todo => !todo.completed);
+    const todosToUpdate = haveActive
+      ? todos.filter(todo => !todo.completed)
+      : todos;
+
+    todosToUpdate.forEach(todo =>
+      dispatch({ type: 'update', payload: { ...todo, completed: haveActive } }),
+    );
+  };
+
+  const handleSubmit = (
+    event: // eslint-disable-next-line @typescript-eslint/indent
+    React.FormEvent<HTMLFormElement> | React.FocusEvent<HTMLInputElement>,
+  ) => {
+    event.preventDefault();
+
+    const newTitle = title.trim();
+
+    if (!newTitle) {
+      setTitle('');
+
+      return;
+    }
+
+    try {
+      setIsSubmiting(true);
+      dispatch({ type: 'add', payload: newTitle });
+      setTitle('');
+    } catch (error) {
+      throw error;
+    } finally {
+      setIsSubmiting(false);
+    }
+  };
+
+  const titleField = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    titleField.current?.focus();
+  }, [todos, isSubmitting]);
+
+  return (
+    <header className="todoapp__header">
+      {!!todos.length && (
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', {
+            active: areAllTodosCompleted,
+          })}
+          data-cy="ToggleAllButton"
+          onClick={handleToggleAll}
+        />
+      )}
+
+      <form onSubmit={handleSubmit}>
+        <input
+          ref={titleField}
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          value={title}
+          onChange={event => setTitle(event.target.value)}
+          disabled={isSubmitting}
+          onBlur={handleSubmit}
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/Header/index.ts b/src/components/Header/index.ts
new file mode 100644
index 000000000..266dec8a1
--- /dev/null
+++ b/src/components/Header/index.ts
@@ -0,0 +1 @@
+export * from './Header';
diff --git a/src/components/TodoItem/TodoItem.tsx b/src/components/TodoItem/TodoItem.tsx
new file mode 100644
index 000000000..d1b3600e9
--- /dev/null
+++ b/src/components/TodoItem/TodoItem.tsx
@@ -0,0 +1,126 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+import React, { useEffect, useRef, useState } from 'react';
+import cn from 'classnames';
+import { Todo } from '../../types/Todo';
+import { useDispatch } from '../../context/Store';
+
+type Props = {
+  todo: Todo;
+};
+
+export const TodoItem: React.FC<Props> = ({ todo }) => {
+  const { id, title, completed } = todo;
+
+  const dispatch = useDispatch();
+
+  const [isEditing, setIsEditing] = useState(false);
+  const [editedTitle, setEditedTitle] = useState(title);
+
+  const handleDelete = () => dispatch({ type: 'delete', payload: id });
+
+  const handleSubmit = (
+    event: // eslint-disable-next-line @typescript-eslint/indent
+    React.FormEvent<HTMLFormElement> | React.FocusEvent<HTMLInputElement>,
+  ) => {
+    event.preventDefault();
+
+    const validEditedTitle = editedTitle.trim();
+
+    if (validEditedTitle === title) {
+      setIsEditing(false);
+
+      return;
+    }
+
+    if (!validEditedTitle) {
+      handleDelete();
+
+      return;
+    }
+
+    try {
+      dispatch({
+        type: 'update',
+        payload: { ...todo, title: validEditedTitle },
+      });
+      setIsEditing(false);
+    } catch (error) {
+      setIsEditing(true);
+
+      throw error;
+    }
+  };
+
+  const handleEsc = (event: React.KeyboardEvent<HTMLInputElement>) => {
+    event.preventDefault();
+
+    if (event.key === 'Escape') {
+      setIsEditing(false);
+      setEditedTitle(title);
+    }
+  };
+
+  const toggleCompletedStatus = () => {
+    dispatch({
+      type: 'update',
+      payload: { ...todo, completed: !completed },
+    });
+  };
+
+  const editField = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (isEditing) {
+      editField.current?.focus();
+    }
+  }, [isEditing]);
+
+  return (
+    <div data-cy="Todo" className={cn('todo', { completed: completed })}>
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={completed}
+          onChange={toggleCompletedStatus}
+        />
+      </label>
+
+      {isEditing ? (
+        <form onSubmit={handleSubmit}>
+          <input
+            ref={editField}
+            data-cy="TodoTitleField"
+            type="text"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            value={editedTitle}
+            onChange={event => setEditedTitle(event.target.value)}
+            onBlur={handleSubmit}
+            onKeyUp={handleEsc}
+          />
+        </form>
+      ) : (
+        <>
+          <span
+            data-cy="TodoTitle"
+            className="todo__title"
+            onDoubleClick={() => setIsEditing(true)}
+          >
+            {title}
+          </span>
+
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={handleDelete}
+          >
+            ×
+          </button>
+        </>
+      )}
+    </div>
+  );
+};
diff --git a/src/components/TodoItem/index.ts b/src/components/TodoItem/index.ts
new file mode 100644
index 000000000..21f4abac3
--- /dev/null
+++ b/src/components/TodoItem/index.ts
@@ -0,0 +1 @@
+export * from './TodoItem';
diff --git a/src/components/TodoList/TodoList.tsx b/src/components/TodoList/TodoList.tsx
new file mode 100644
index 000000000..09c40ce0c
--- /dev/null
+++ b/src/components/TodoList/TodoList.tsx
@@ -0,0 +1,15 @@
+import React from 'react';
+import { Todo } from '../../types/Todo';
+import { TodoItem } from '../TodoItem/TodoItem';
+
+type Props = {
+  filteredTodos: Todo[];
+};
+
+export const TodoList: React.FC<Props> = ({ filteredTodos }) => (
+  <section className="todoapp__main" data-cy="TodoList">
+    {filteredTodos.map((todo: Todo) => (
+      <TodoItem key={todo.id} todo={todo} />
+    ))}
+  </section>
+);
diff --git a/src/components/TodoList/index.ts b/src/components/TodoList/index.ts
new file mode 100644
index 000000000..f239f4345
--- /dev/null
+++ b/src/components/TodoList/index.ts
@@ -0,0 +1 @@
+export * from './TodoList';
diff --git a/src/context/Store.tsx b/src/context/Store.tsx
new file mode 100644
index 000000000..000d10a2d
--- /dev/null
+++ b/src/context/Store.tsx
@@ -0,0 +1,74 @@
+import {
+  createContext,
+  Dispatch,
+  FC,
+  ReactNode,
+  useContext,
+  useReducer,
+} from 'react';
+import { Todo } from '../types/Todo';
+import { getLocalStorage } from '../utils/getLocalStorageData';
+
+type Action =
+  | { type: 'add'; payload: string }
+  | { type: 'update'; payload: Todo }
+  | { type: 'delete'; payload: number };
+
+function reducer(todos: Todo[], action: Action) {
+  let newTodos: Todo[] = [];
+
+  switch (action.type) {
+    case 'add':
+      newTodos = [
+        ...todos,
+        {
+          id: +new Date(),
+          title: action.payload,
+          completed: false,
+        },
+      ];
+      break;
+
+    case 'update':
+      newTodos = todos.map(todo =>
+        todo.id === action.payload.id ? action.payload : todo,
+      );
+      break;
+
+    case 'delete':
+      newTodos = todos.filter(todo => todo.id !== action.payload);
+      break;
+
+    default:
+      return todos;
+  }
+
+  localStorage.setItem('todos', JSON.stringify(newTodos));
+
+  return newTodos;
+}
+
+const initialTodos: Todo[] = getLocalStorage<Todo[]>('todos', []);
+
+const defaultDispatch: Dispatch<Action> = () => {};
+
+export const TodosContext = createContext(initialTodos);
+export const DispatchContext = createContext(defaultDispatch);
+
+type Props = {
+  children: ReactNode;
+};
+
+export const GlobalStateProvider: FC<Props> = ({ children }) => {
+  const [todos, dispatch] = useReducer(reducer, initialTodos);
+
+  return (
+    <DispatchContext.Provider value={dispatch}>
+      <TodosContext.Provider value={todos}>{children}</TodosContext.Provider>
+    </DispatchContext.Provider>
+  );
+};
+
+export const useGlobalState = () => useContext(TodosContext);
+
+export const useDispatch = () => useContext(DispatchContext);
diff --git a/src/index.tsx b/src/index.tsx
index a9689cb38..7beac4659 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -1,11 +1,14 @@
 import { createRoot } from 'react-dom/client';
 
-import './styles/index.css';
-import './styles/todo-list.css';
-import './styles/filters.css';
+import 'bulma/css/bulma.css';
+import '@fortawesome/fontawesome-free/css/all.css';
+import './styles/index.scss';
 
 import { App } from './App';
+import { GlobalStateProvider } from './context/Store';
 
-const container = document.getElementById('root') as HTMLDivElement;
-
-createRoot(container).render(<App />);
+createRoot(document.getElementById('root') as HTMLDivElement).render(
+  <GlobalStateProvider>
+    <App />
+  </GlobalStateProvider>,
+);
diff --git a/src/types/FilterStatus.ts b/src/types/FilterStatus.ts
new file mode 100644
index 000000000..7ca17f289
--- /dev/null
+++ b/src/types/FilterStatus.ts
@@ -0,0 +1,5 @@
+export enum FilterStatus {
+  All = 'All',
+  Active = 'Active',
+  Completed = 'Completed',
+}
diff --git a/src/types/Todo.ts b/src/types/Todo.ts
new file mode 100644
index 000000000..f9e06b381
--- /dev/null
+++ b/src/types/Todo.ts
@@ -0,0 +1,5 @@
+export interface Todo {
+  id: number;
+  title: string;
+  completed: boolean;
+}
diff --git a/src/utils/fetchClient.ts b/src/utils/fetchClient.ts
new file mode 100644
index 000000000..33b2e0bd2
--- /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: <T>(url: string) => request<T>(url, 'DELETE'),
+};
diff --git a/src/utils/getFilteredTodos.ts b/src/utils/getFilteredTodos.ts
new file mode 100644
index 000000000..2a28f3ceb
--- /dev/null
+++ b/src/utils/getFilteredTodos.ts
@@ -0,0 +1,17 @@
+import { FilterStatus } from '../types/FilterStatus';
+import { Todo } from '../types/Todo';
+
+export function getFilteredTodos(todos: Todo[], filter: FilterStatus) {
+  return todos.filter(todo => {
+    switch (filter) {
+      case FilterStatus.Active:
+        return !todo.completed;
+
+      case FilterStatus.Completed:
+        return todo.completed;
+
+      default:
+        return todos;
+    }
+  });
+}
diff --git a/src/utils/getLocalStorageData.ts b/src/utils/getLocalStorageData.ts
new file mode 100644
index 000000000..e1555f4f9
--- /dev/null
+++ b/src/utils/getLocalStorageData.ts
@@ -0,0 +1,17 @@
+export function getLocalStorage<T>(key: string, value: T) {
+  const data = localStorage.getItem(key);
+
+  if (!data) {
+    localStorage.setItem(key, JSON.stringify(value));
+
+    return value;
+  }
+
+  try {
+    return JSON.parse(data);
+  } catch {
+    localStorage.removeItem(key);
+
+    return value;
+  }
+}