diff --git a/src/App.tsx b/src/App.tsx
index a399287bd..51c5f2086 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,156 +1,119 @@
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useContext, useState } from 'react';
+
+import { Filter } from './types/Filter';
+import { TodosContext } from './TodoContext/TodoContext';
+import { Header } from './components/Header/header';
+import { Footer } from './components/Footer/footer';
+import { TodoList } from './components/TodoList/todoList';
 
 export const App: React.FC = () => {
+  const [filterStatus, setFilterStatus] = useState<Filter>(Filter.All);
+  const [editTodo, setEditingTodo] = useState<number | null>(null);
+  const [editingValue, setEditingValue] = useState<string>('');
+  const { todos, setTodos } = useContext(TodosContext);
+
+  const handleDeleteTodo = (todoId: number) => {
+    const updateTodos = todos.filter(todo => todo.id !== todoId);
+
+    setTodos(updateTodos);
+  };
+
+  const updateTodoStatus = (todoId: number) => {
+    const updatedTodos = todos.map(todo => {
+      if (todo.id === todoId) {
+        return { ...todo, completed: !todo.completed };
+      }
+
+      return todo;
+    });
+
+    setTodos(updatedTodos);
+  };
+
+  const handleUpdateAll = () => {
+    const areSomeIncomplete = todos.some(todo => !todo.completed);
+
+    if (areSomeIncomplete) {
+      setTodos(
+        todos.map(todo => ({
+          ...todo,
+          completed: true,
+        })),
+      );
+    } else {
+      setTodos(
+        todos.map(todo => ({
+          ...todo,
+          completed: false,
+        })),
+      );
+    }
+  };
+
+  const handleRanameTodo = (todoId: number) => {
+    const todo = todos.find(t => t.id === todoId);
+
+    if (todo) {
+      setEditingTodo(todoId);
+      setEditingValue(todo.title);
+    }
+  };
+
+  const handleTodoTitleBlur = () => {
+    if (editingValue.trim() === '') {
+      handleDeleteTodo(editTodo as number);
+    } else {
+      const updatedTodos = todos.map(todo => {
+        if (todo.id === editTodo) {
+          return { ...todo, title: editingValue.trim() };
+        }
+
+        return todo;
+      });
+
+      setTodos(updatedTodos);
+    }
+
+    setEditingTodo(null);
+    setEditingValue('');
+  };
+
+  const handleTodoTitleKeyUp = (
+    event: React.KeyboardEvent<HTMLInputElement>,
+  ) => {
+    if (event.key === 'Escape') {
+      setEditingTodo(null);
+      setEditingValue('');
+    } else if (event.key === 'Enter') {
+      handleTodoTitleBlur();
+    }
+  };
+
   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"
+        <Header updateAll={handleUpdateAll} />
+
+        <TodoList
+          filterStatus={filterStatus}
+          editTodoId={editTodo}
+          editingValue={editingValue}
+          setEditingValue={setEditingValue}
+          onTodoStatusChange={updateTodoStatus}
+          onTodoDelete={handleDeleteTodo}
+          onTodoDoubleClick={handleRanameTodo}
+          onEditTitleBlur={handleTodoTitleBlur}
+          onEditTitleKeyUp={handleTodoTitleKeyUp}
+        />
+
+        {todos.length !== 0 && (
+          <Footer
+            filterStatus={filterStatus}
+            setFilterStatus={setFilterStatus}
           />
-
-          {/* 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>
-
-            <a
-              href="#/completed"
-              className="filter__link"
-              data-cy="FilterLinkCompleted"
-            >
-              Completed
-            </a>
-          </nav>
-
-          {/* 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>
+        )}
       </div>
     </div>
   );
diff --git a/src/TodoContext/TodoContext.tsx b/src/TodoContext/TodoContext.tsx
new file mode 100644
index 000000000..526b88b38
--- /dev/null
+++ b/src/TodoContext/TodoContext.tsx
@@ -0,0 +1,33 @@
+import React, { useMemo } from 'react';
+import { useLocalStorage } from '../hooks/useLocalStorage';
+import { Todo } from '../types/Todos';
+
+interface TodosContextType {
+  todos: Todo[];
+  setTodos: (todos: Todo[]) => void;
+}
+
+export const TodosContext = React.createContext<TodosContextType>({
+  todos: [],
+  setTodos: () => {},
+});
+
+type Props = {
+  children: React.ReactNode;
+};
+
+export const TodosProvider: React.FC<Props> = ({ children }) => {
+  const [todos, setTodos] = useLocalStorage<Todo[]>('todos', []);
+
+  const value = useMemo(
+    () => ({
+      todos,
+      setTodos,
+    }),
+    [todos, setTodos],
+  );
+
+  return (
+    <TodosContext.Provider value={value}>{children}</TodosContext.Provider>
+  );
+};
diff --git a/src/components/Footer/footer.tsx b/src/components/Footer/footer.tsx
new file mode 100644
index 000000000..affa1de7d
--- /dev/null
+++ b/src/components/Footer/footer.tsx
@@ -0,0 +1,53 @@
+import classNames from 'classnames';
+import { Filter } from '../../types/Filter';
+import { TodosContext } from '../../TodoContext/TodoContext';
+import { useContext } from 'react';
+
+type Props = {
+  filterStatus: Filter;
+  setFilterStatus: (status: Filter) => void;
+};
+
+export const Footer: React.FC<Props> = ({ filterStatus, setFilterStatus }) => {
+  const { todos, setTodos } = useContext(TodosContext);
+
+  const handleCompletedDelete = () => {
+    const notCompletedTodos = todos.filter(todo => !todo.completed);
+
+    setTodos(notCompletedTodos);
+  };
+
+  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(status => (
+          <a
+            key={status}
+            href={`#/${status}`}
+            className={classNames('filter__link', {
+              selected: status === filterStatus,
+            })}
+            data-cy={`FilterLink${status}`}
+            onClick={() => setFilterStatus(status)}
+          >
+            {status}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={!todos.some(todo => todo.completed)}
+        onClick={handleCompletedDelete}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/Header/header.tsx b/src/components/Header/header.tsx
new file mode 100644
index 000000000..cc3543ea7
--- /dev/null
+++ b/src/components/Header/header.tsx
@@ -0,0 +1,71 @@
+import React, { useContext, useEffect, useRef } from 'react';
+import { Todo } from '../../types/Todos';
+import classNames from 'classnames';
+import { TodosContext } from '../../TodoContext/TodoContext';
+
+type Props = {
+  updateAll: () => void;
+};
+
+export const Header: React.FC<Props> = ({ updateAll }) => {
+  const inputField = useRef<HTMLInputElement>(null);
+  const { todos, setTodos } = useContext(TodosContext);
+
+  useEffect(() => {
+    if (inputField.current) {
+      inputField.current.focus();
+    }
+  }, [todos]);
+
+  const handleSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+    const inputValue = inputField.current?.value.trim();
+
+    if (!inputValue) {
+      return;
+    }
+
+    if (inputField.current) {
+      inputField.current.value = '';
+    }
+
+    if (inputValue) {
+      const newTodo: Todo = {
+        id: +new Date(),
+        title: inputValue,
+        userId: 1139,
+        completed: false,
+      };
+
+      setTodos([...todos, newTodo]);
+    }
+  };
+
+  const allTodosCompleted =
+    todos.length > 0 && todos.every(todo => todo.completed);
+
+  return (
+    <header className="todoapp__header">
+      {!!todos.length && (
+        <button
+          type="button"
+          className={classNames('todoapp__toggle-all', {
+            active: allTodosCompleted,
+          })}
+          data-cy="ToggleAllButton"
+          onClick={updateAll}
+        />
+      )}
+
+      <form onSubmit={handleSubmit}>
+        <input
+          data-cy="NewTodoField"
+          type="text"
+          ref={inputField}
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/TodoItem/todoItem.tsx b/src/components/TodoItem/todoItem.tsx
new file mode 100644
index 000000000..9f81acbd7
--- /dev/null
+++ b/src/components/TodoItem/todoItem.tsx
@@ -0,0 +1,108 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+/* eslint-disable jsx-a11y/control-has-associated-label */
+
+import cn from 'classnames';
+import React, { useContext } from 'react';
+import { TodosContext } from '../../TodoContext/TodoContext';
+
+type Props = {
+  todoId: number;
+  isEditing: boolean;
+  editingValue: string;
+  setEditingValue: (value: string) => void;
+  onTodoStatusChange: (id: number) => void;
+  onTodoDelete: (id: number) => void;
+  onTodoDoubleClick: (id: number) => void;
+  onEditTitleBlur: () => void;
+  onEditTitleKeyUp: (event: React.KeyboardEvent<HTMLInputElement>) => void;
+  editingField: React.RefObject<HTMLInputElement>;
+};
+
+export const TodoItem: React.FC<Props> = ({
+  todoId,
+  isEditing,
+  editingValue,
+  setEditingValue,
+  onTodoStatusChange,
+  onTodoDelete,
+  onTodoDoubleClick,
+  onEditTitleBlur,
+  onEditTitleKeyUp,
+  editingField,
+}) => {
+  const { todos } = useContext(TodosContext);
+  const todo = todos.find(t => t.id === todoId);
+
+  if (!todo) {
+    return null;
+  }
+
+  const { id, title, completed } = todo;
+
+  const handleEditTitle = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setEditingValue(event.target.value);
+  };
+
+  return (
+    <div
+      key={id}
+      data-cy="Todo"
+      className={cn('todo', {
+        completed: completed,
+      })}
+      onDoubleClick={() => onTodoDoubleClick(id)}
+    >
+      {isEditing ? (
+        <>
+          <label className="todo__status-label" htmlFor={`todo-${id}`}>
+            <input
+              id={`todo-${id}`}
+              data-cy="TodoStatus"
+              type="checkbox"
+              className="todo__status"
+              checked={completed}
+              onChange={() => onTodoStatusChange(id)}
+            />
+          </label>
+          <input
+            data-cy="TodoTitleField"
+            className="todo__title-field"
+            ref={editingField}
+            type="text"
+            value={editingValue}
+            placeholder={
+              editingValue.length === 0 ? 'Empty todo will be deleted' : ''
+            }
+            onChange={handleEditTitle}
+            onBlur={onEditTitleBlur}
+            onKeyUp={onEditTitleKeyUp}
+          />
+        </>
+      ) : (
+        <>
+          <label className="todo__status-label" htmlFor={`todo-${id}`}>
+            <input
+              id={`todo-${id}`}
+              data-cy="TodoStatus"
+              type="checkbox"
+              className="todo__status"
+              checked={todo.completed}
+              onChange={() => onTodoStatusChange(id)}
+            />
+          </label>
+          <span data-cy="TodoTitle" className="todo__title">
+            {title}
+          </span>
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={() => onTodoDelete(id)}
+          >
+            ×
+          </button>
+        </>
+      )}
+    </div>
+  );
+};
diff --git a/src/components/TodoList/todoList.tsx b/src/components/TodoList/todoList.tsx
new file mode 100644
index 000000000..2df7cf6b5
--- /dev/null
+++ b/src/components/TodoList/todoList.tsx
@@ -0,0 +1,69 @@
+import { useContext, useEffect, useRef } from 'react';
+import { Filter } from '../../types/Filter';
+import { TodosContext } from '../../TodoContext/TodoContext';
+import { TodoItem } from '../TodoItem/todoItem';
+
+type Props = {
+  filterStatus: Filter;
+  editTodoId: number | null;
+  editingValue: string;
+  setEditingValue: (value: string) => void;
+  onTodoStatusChange: (id: number) => void;
+  onTodoDelete: (id: number) => void;
+  onTodoDoubleClick: (id: number) => void;
+  onEditTitleBlur: () => void;
+  onEditTitleKeyUp: (event: React.KeyboardEvent<HTMLInputElement>) => void;
+};
+
+export const TodoList: React.FC<Props> = ({
+  filterStatus,
+  editTodoId,
+  editingValue,
+  setEditingValue,
+  onTodoStatusChange,
+  onTodoDelete,
+  onTodoDoubleClick,
+  onEditTitleBlur,
+  onEditTitleKeyUp,
+}) => {
+  const { todos } = useContext(TodosContext);
+  const editingField = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (editingField.current) {
+      editingField.current.focus();
+    }
+  }, [editTodoId]);
+
+  const filteredTodos = todos.filter(todo => {
+    switch (filterStatus) {
+      case Filter.Active:
+        return !todo.completed;
+      case Filter.Completed:
+        return todo.completed;
+      case Filter.All:
+      default:
+        return true;
+    }
+  });
+
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      {filteredTodos.map(todo => (
+        <TodoItem
+          key={todo.id}
+          todoId={todo.id}
+          isEditing={editTodoId === todo.id}
+          editingValue={editingValue}
+          setEditingValue={setEditingValue}
+          onTodoStatusChange={onTodoStatusChange}
+          onTodoDelete={onTodoDelete}
+          onTodoDoubleClick={onTodoDoubleClick}
+          onEditTitleBlur={onEditTitleBlur}
+          onEditTitleKeyUp={onEditTitleKeyUp}
+          editingField={editingField}
+        />
+      ))}
+    </section>
+  );
+};
diff --git a/src/hooks/useLocalStorage.ts b/src/hooks/useLocalStorage.ts
new file mode 100644
index 000000000..d4069dfe6
--- /dev/null
+++ b/src/hooks/useLocalStorage.ts
@@ -0,0 +1,29 @@
+import { useState } from 'react';
+
+export function useLocalStorage<T>(
+  key: string,
+  startValue: T,
+): [T, (v: T) => void] {
+  const [value, setValue] = useState(() => {
+    const data = localStorage.getItem(key);
+
+    if (data === null) {
+      return startValue;
+    }
+
+    try {
+      return JSON.parse(data);
+    } catch (e) {
+      localStorage.removeItem(key);
+
+      return startValue;
+    }
+  });
+
+  const save = (newValue: T) => {
+    localStorage.setItem(key, JSON.stringify(newValue));
+    setValue(newValue);
+  };
+
+  return [value, save];
+}
diff --git a/src/index.tsx b/src/index.tsx
index a9689cb38..a8d19277d 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 './styles/index.scss';
 
 import { App } from './App';
+import { TodosProvider } from './TodoContext/TodoContext';
 
 const container = document.getElementById('root') as HTMLDivElement;
 
-createRoot(container).render(<App />);
+createRoot(container).render(
+  <TodosProvider>
+    <App />
+  </TodosProvider>,
+);
diff --git a/src/styles/todoapp.scss b/src/styles/todoapp.scss
index e289a9458..924fac8f2 100644
--- a/src/styles/todoapp.scss
+++ b/src/styles/todoapp.scss
@@ -1,3 +1,9 @@
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
 .todoapp {
   font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
   font-size: 24px;
diff --git a/src/types/Filter.ts b/src/types/Filter.ts
new file mode 100644
index 000000000..66887875b
--- /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/Todos.ts b/src/types/Todos.ts
new file mode 100644
index 000000000..3f52a5fdd
--- /dev/null
+++ b/src/types/Todos.ts
@@ -0,0 +1,6 @@
+export interface Todo {
+  id: number;
+  userId: number;
+  title: string;
+  completed: boolean;
+}