diff --git a/src/App.tsx b/src/App.tsx
index 81e011f432..5fbeeff5fe 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,26 +1,185 @@
 /* eslint-disable max-len */
+/* eslint-disable jsx-a11y/label-has-associated-control */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useCallback, useEffect, useMemo, useState } from 'react';
 import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import {
+  createTodo,
+  deleteTodo,
+  getTodos,
+  updateTodo,
+  USER_ID,
+} from './api/todos';
+import { Todo } from './types/Todo';
+import { ErrorNotification } from './components/ErrorNotification';
+import { FilterType } from './types/FilterType';
+import { TodoList } from './components/TodoList';
+import { Footer } from './components/Footer';
+import { Header } from './components/Header';
+import { ErrorType } from './types/ErrorType';
 
 export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [errorTodos, setErrorTodos] = useState(ErrorType.NoErrors);
+  const [status, setStatus] = useState(FilterType.All);
+  const [isLoading, setIsLoading] = useState(true);
+  const [loadingTodosIds, setLoadingTodosIds] = useState<number[]>([]);
+
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+
+  useEffect(() => {
+    setIsLoading(true);
+    getTodos()
+      .then(setTodos)
+      .catch(() => {
+        setErrorTodos(ErrorType.Loading);
+      })
+      .finally(() => {
+        setIsLoading(false);
+      });
+  }, []);
+
+  const visibleTodos = todos.filter(todo => {
+    switch (status) {
+      case FilterType.Completed:
+        return todo.completed;
+      case FilterType.Active:
+        return !todo.completed;
+      default:
+        return true;
+    }
+  });
+
+  const activeTodosCount = useMemo(
+    () => todos.filter(todo => !todo.completed).length,
+    [todos],
+  );
+
+  const completedTodos = useMemo(
+    () => todos.filter(todo => todo.completed),
+    [todos],
+  );
+
+  const completedTodosCount = completedTodos.length;
+
+  const handleErrorClose = useCallback(() => {
+    setErrorTodos(ErrorType.NoErrors);
+  }, []);
+
+  const onAddTodo = useCallback(
+    async (newTodo: Omit<Todo, 'id'>): Promise<void> => {
+      try {
+        const createdTodo = await createTodo(newTodo);
+
+        setTodos(currentTodos => [...currentTodos, createdTodo]);
+      } catch (error) {
+        setErrorTodos(ErrorType.Add);
+        throw error;
+      }
+    },
+    [],
+  );
+
+  const onDeleteTodo = useCallback(async (todoId: number) => {
+    setLoadingTodosIds(currentIds => [...currentIds, todoId]);
+    try {
+      await deleteTodo(todoId);
+      setTodos(currentTodos => currentTodos.filter(todo => todo.id !== todoId));
+    } catch (error) {
+      setErrorTodos(ErrorType.Delete);
+      throw error;
+    } finally {
+      setLoadingTodosIds(currentIds => currentIds.filter(id => id !== todoId));
+    }
+  }, []);
+
+  const onDeleteAllCompleted = useCallback(() => {
+    completedTodos.forEach(completedTodo => {
+      onDeleteTodo(completedTodo.id);
+    });
+  }, [completedTodos, onDeleteTodo]);
+
+  const onUpdateTodo = useCallback(async (newTodo: Todo) => {
+    setLoadingTodosIds(currentIds => [...currentIds, newTodo.id]);
+    try {
+      const updatedTodo = await updateTodo(newTodo);
+
+      setTodos(currentTodos =>
+        currentTodos.map(todo => {
+          return todo.id === updatedTodo.id ? updatedTodo : todo;
+        }),
+      );
+    } catch (error) {
+      setErrorTodos(ErrorType.Update);
+      throw error;
+    } finally {
+      setLoadingTodosIds(currentIds =>
+        currentIds.filter(id => id !== newTodo.id),
+      );
+    }
+  }, []);
+
+  const onUpdateToggleAll = useCallback(() => {
+    todos.forEach(todo => {
+      if (todos.length === completedTodosCount) {
+        onUpdateTodo({ ...todo, completed: false });
+
+        return;
+      }
+
+      if (todo.completed === false) {
+        onUpdateTodo({ ...todo, completed: true });
+
+        return;
+      }
+    });
+  }, [todos, completedTodosCount, onUpdateTodo]);
+
   if (!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}
+          completedTodosCount={completedTodosCount}
+          onAddTodo={onAddTodo}
+          setErrorTodos={setErrorTodos}
+          tempTodo={tempTodo}
+          setTempTodo={setTempTodo}
+          onUpdateToggleAll={onUpdateToggleAll}
+        />
+
+        {!!todos.length && (
+          <>
+            <TodoList
+              todos={visibleTodos}
+              onDeleteTodo={onDeleteTodo}
+              onUpdateTodo={onUpdateTodo}
+              isDataLoading={isLoading}
+              loadingTodosIds={loadingTodosIds}
+              tempTodo={tempTodo}
+            />
+
+            <Footer
+              activeCount={activeTodosCount}
+              completedCount={completedTodosCount}
+              status={status}
+              setStatus={setStatus}
+              onDeleteAllCompleted={onDeleteAllCompleted}
+            />
+          </>
+        )}
+      </div>
+
+      <ErrorNotification
+        error={errorTodos}
+        handleErrorClose={handleErrorClose}
+      />
+    </div>
   );
 };
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..957a9b7e49
--- /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 = 2153;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const createTodo = (newTodo: Omit<Todo, 'id'>) => {
+  return client.post<Todo>(`/todos`, newTodo);
+};
+
+export const updateTodo = ({ id, title, userId, completed }: Todo) => {
+  return client.patch<Todo>(`/todos/${id}`, { id, title, userId, completed });
+};
diff --git a/src/components/ErrorNotification/ErrorNotification.tsx b/src/components/ErrorNotification/ErrorNotification.tsx
new file mode 100644
index 0000000000..81acf2ae99
--- /dev/null
+++ b/src/components/ErrorNotification/ErrorNotification.tsx
@@ -0,0 +1,43 @@
+import React, { useEffect } from 'react';
+import cn from 'classnames';
+import { ErrorType } from '../../types/ErrorType';
+
+type Props = {
+  error: string;
+  handleErrorClose: () => void;
+};
+
+export const ErrorNotification: React.FC<Props> = props => {
+  const { error, handleErrorClose } = props;
+
+  useEffect(() => {
+    if (error === ErrorType.NoErrors) {
+      return;
+    }
+
+    const timeoutId = setTimeout(() => {
+      handleErrorClose();
+    }, 3000);
+
+    return () => {
+      clearTimeout(timeoutId);
+    };
+  }, [error, handleErrorClose]);
+
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={cn('notification is-danger is-light has-text-weight-normal', {
+        hidden: !error,
+      })}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={handleErrorClose}
+      />
+      {error}
+    </div>
+  );
+};
diff --git a/src/components/ErrorNotification/index.tsx b/src/components/ErrorNotification/index.tsx
new file mode 100644
index 0000000000..8cb4787920
--- /dev/null
+++ b/src/components/ErrorNotification/index.tsx
@@ -0,0 +1 @@
+export * from './ErrorNotification';
diff --git a/src/components/Footer/Footer.tsx b/src/components/Footer/Footer.tsx
new file mode 100644
index 0000000000..2d27a22fe6
--- /dev/null
+++ b/src/components/Footer/Footer.tsx
@@ -0,0 +1,58 @@
+import React from 'react';
+import cn from 'classnames';
+import { FilterType } from '../../types/FilterType';
+import { Dispatch, SetStateAction } from 'react';
+
+type Props = {
+  activeCount: number | undefined;
+  completedCount: number | undefined;
+  status: FilterType;
+  setStatus: Dispatch<SetStateAction<FilterType>>;
+  onDeleteAllCompleted: () => void;
+};
+
+export const Footer: React.FC<Props> = props => {
+  const {
+    activeCount,
+    completedCount,
+    status,
+    setStatus,
+    onDeleteAllCompleted,
+  } = props;
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {activeCount} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(FilterType).map(filter => (
+          <a
+            key={filter}
+            href={`#/${filter !== FilterType.All && filter.toLowerCase()}`}
+            className={cn('filter__link', {
+              selected: status === filter,
+            })}
+            data-cy={`FilterLink${filter}`}
+            onClick={() => {
+              setStatus(filter);
+            }}
+          >
+            {filter}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        onClick={onDeleteAllCompleted}
+        disabled={!completedCount}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/Footer/index.tsx b/src/components/Footer/index.tsx
new file mode 100644
index 0000000000..ddcc5a9cd1
--- /dev/null
+++ b/src/components/Footer/index.tsx
@@ -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 0000000000..24d8c2570f
--- /dev/null
+++ b/src/components/Header/Header.tsx
@@ -0,0 +1,106 @@
+/* eslint-disable max-len */
+import React, {
+  Dispatch,
+  SetStateAction,
+  useEffect,
+  useRef,
+  useState,
+} from 'react';
+import cn from 'classnames';
+import { USER_ID } from '../../api/todos';
+import { Todo } from '../../types/Todo';
+import { ErrorType } from '../../types/ErrorType';
+
+type Props = {
+  todos: Todo[];
+  completedTodosCount: number;
+  onAddTodo: (newTodo: Omit<Todo, 'id'>) => Promise<void>;
+  setErrorTodos: Dispatch<SetStateAction<ErrorType>>;
+  tempTodo: Todo | null;
+  setTempTodo: Dispatch<SetStateAction<Todo | null>>;
+  onUpdateToggleAll: () => void;
+};
+
+export const Header: React.FC<Props> = props => {
+  const {
+    todos,
+    completedTodosCount,
+    onAddTodo,
+    setErrorTodos,
+    tempTodo,
+    setTempTodo,
+    onUpdateToggleAll,
+  } = props;
+
+  const [todoTitle, setTodoTitle] = useState('');
+  const normalizedTitle = todoTitle.trim();
+
+  const inputNameRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (inputNameRef.current) {
+      inputNameRef.current.focus();
+    }
+  }, [todos, tempTodo]);
+
+  const onResetTitle = () => {
+    setTodoTitle('');
+  };
+
+  const handleSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+
+    if (!normalizedTitle) {
+      setErrorTodos(ErrorType.EmptyTitle);
+
+      return;
+    }
+
+    const newTodo = {
+      title: normalizedTitle,
+      userId: USER_ID,
+      completed: false,
+    };
+
+    setTempTodo({
+      ...newTodo,
+      id: 0,
+    });
+
+    try {
+      await onAddTodo(newTodo);
+      onResetTitle();
+    } catch (error) {
+    } finally {
+      setTempTodo(null);
+    }
+  };
+
+  return (
+    <header className="todoapp__header">
+      {todos.length > 0 && (
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', {
+            active: todos.length === completedTodosCount,
+          })}
+          onClick={() => onUpdateToggleAll()}
+          data-cy="ToggleAllButton"
+        />
+      )}
+
+      <form onSubmit={handleSubmit}>
+        <input
+          ref={inputNameRef}
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          disabled={!!tempTodo}
+          value={todoTitle}
+          onChange={event => setTodoTitle(event.target.value)}
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/Header/index.tsx b/src/components/Header/index.tsx
new file mode 100644
index 0000000000..266dec8a1b
--- /dev/null
+++ b/src/components/Header/index.tsx
@@ -0,0 +1 @@
+export * from './Header';
diff --git a/src/components/TodoComponent/TodoComponent.tsx b/src/components/TodoComponent/TodoComponent.tsx
new file mode 100644
index 0000000000..e31e91f2d1
--- /dev/null
+++ b/src/components/TodoComponent/TodoComponent.tsx
@@ -0,0 +1,152 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+import React, {
+  Dispatch,
+  SetStateAction,
+  useEffect,
+  useRef,
+  useState,
+} from 'react';
+import cn from 'classnames';
+
+import { Todo } from '../../types/Todo';
+
+type Props = {
+  todo: Todo;
+  onDeleteTodo: (id: number) => Promise<void>;
+  onUpdateTodo: (newTodo: Todo) => Promise<void>;
+  isDataLoading: boolean;
+  isTodoLoading: boolean;
+  editingTodoId: number | null;
+  setEditingTodoId: Dispatch<SetStateAction<number | null>>;
+};
+
+export const TodoComponent: React.FC<Props> = props => {
+  const {
+    todo,
+    onDeleteTodo,
+    onUpdateTodo,
+    isDataLoading,
+    isTodoLoading,
+    editingTodoId,
+    setEditingTodoId,
+  } = props;
+
+  const [newTitle, setNewTitle] = useState(todo.title);
+
+  const inputNameRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (inputNameRef.current) {
+      inputNameRef.current.focus();
+    }
+  }, [editingTodoId]);
+
+  const handleDelete = async (todoId: number) => {
+    try {
+      onDeleteTodo(todoId);
+    } catch (error) {}
+  };
+
+  const handleToggle = async (newTodo: Todo) => {
+    try {
+      await onUpdateTodo({ ...newTodo, completed: !newTodo.completed });
+    } catch (error) {}
+  };
+
+  const handleEdit = async (newTodo: Todo) => {
+    try {
+      if (newTitle === newTodo.title) {
+        setEditingTodoId(null);
+
+        return;
+      }
+
+      if (newTitle.trim() === '') {
+        await onDeleteTodo(newTodo.id);
+        setEditingTodoId(null);
+
+        return;
+      }
+
+      await onUpdateTodo({
+        ...newTodo,
+        title: newTitle.trim(),
+      });
+      setEditingTodoId(null);
+    } catch (error) {}
+  };
+
+  const handleEscape = (event: React.KeyboardEvent<HTMLInputElement>) => {
+    if (event.key === 'Escape') {
+      setEditingTodoId(null);
+      setNewTitle(todo.title);
+    }
+  };
+
+  return (
+    <div data-cy="Todo" className={cn('todo', { completed: todo.completed })}>
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={todo.completed}
+          onChange={() => {
+            handleToggle(todo);
+          }}
+        />
+      </label>
+
+      {editingTodoId === todo.id ? (
+        <form
+          onSubmit={event => {
+            event.preventDefault();
+            handleEdit(todo);
+          }}
+          onBlur={() => handleEdit(todo)}
+        >
+          <input
+            type="text"
+            data-cy="TodoTitleField"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            ref={inputNameRef}
+            value={newTitle}
+            onChange={event => {
+              setNewTitle(event.target.value);
+            }}
+            onKeyUp={handleEscape}
+          />
+        </form>
+      ) : (
+        <>
+          <span
+            data-cy="TodoTitle"
+            className="todo__title"
+            onDoubleClick={() => setEditingTodoId(todo.id)}
+          >
+            {todo.title}
+          </span>
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={() => handleDelete(todo.id)}
+          >
+            ×
+          </button>
+        </>
+      )}
+
+      <div
+        data-cy="TodoLoader"
+        className={cn('modal overlay', {
+          'is-active': isDataLoading || isTodoLoading,
+        })}
+      >
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </div>
+  );
+};
diff --git a/src/components/TodoComponent/index.tsx b/src/components/TodoComponent/index.tsx
new file mode 100644
index 0000000000..11cf5d69d2
--- /dev/null
+++ b/src/components/TodoComponent/index.tsx
@@ -0,0 +1 @@
+export * from './TodoComponent';
diff --git a/src/components/TodoList/TodoList.tsx b/src/components/TodoList/TodoList.tsx
new file mode 100644
index 0000000000..d40f4f8e99
--- /dev/null
+++ b/src/components/TodoList/TodoList.tsx
@@ -0,0 +1,46 @@
+import React, { useState } from 'react';
+
+import { Todo } from '../../types/Todo';
+import { TodoComponent } from '../TodoComponent';
+import { TodoTemp } from '../TodoTemp';
+
+type Props = {
+  todos: Todo[];
+  onDeleteTodo: (id: number) => Promise<void>;
+  onUpdateTodo: (newTodo: Todo) => Promise<void>;
+  isDataLoading: boolean;
+  loadingTodosIds: number[];
+  tempTodo: Todo | null;
+};
+
+export const TodoList: React.FC<Props> = props => {
+  const {
+    todos,
+    onDeleteTodo,
+    onUpdateTodo,
+    isDataLoading,
+    loadingTodosIds,
+    tempTodo,
+  } = props;
+
+  const [editingTodoId, setEditingTodoId] = useState<number | null>(null);
+
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      {todos?.map(todo => (
+        <TodoComponent
+          todo={todo}
+          key={todo.id}
+          onDeleteTodo={onDeleteTodo}
+          onUpdateTodo={onUpdateTodo}
+          isDataLoading={isDataLoading}
+          isTodoLoading={loadingTodosIds.includes(todo.id)}
+          editingTodoId={editingTodoId}
+          setEditingTodoId={setEditingTodoId}
+        />
+      ))}
+
+      {tempTodo && <TodoTemp todo={tempTodo} />}
+    </section>
+  );
+};
diff --git a/src/components/TodoList/index.tsx b/src/components/TodoList/index.tsx
new file mode 100644
index 0000000000..f239f43459
--- /dev/null
+++ b/src/components/TodoList/index.tsx
@@ -0,0 +1 @@
+export * from './TodoList';
diff --git a/src/components/TodoTemp/TodoTemp.tsx b/src/components/TodoTemp/TodoTemp.tsx
new file mode 100644
index 0000000000..0ae1d4e051
--- /dev/null
+++ b/src/components/TodoTemp/TodoTemp.tsx
@@ -0,0 +1,37 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+import React from 'react';
+import cn from 'classnames';
+
+import { Todo } from '../../types/Todo';
+
+type Props = {
+  todo: Todo;
+};
+
+export const TodoTemp: React.FC<Props> = props => {
+  const { todo } = props;
+
+  return (
+    <div data-cy="Todo" className={cn('todo', { completed: todo.completed })}>
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={todo.completed}
+        />
+      </label>
+
+      <span data-cy="TodoTitle" className="todo__title">
+        {todo.title}
+      </span>
+      <button type="button" className="todo__remove" data-cy="TodoDelete">
+        ×
+      </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/TodoTemp/index.tsx b/src/components/TodoTemp/index.tsx
new file mode 100644
index 0000000000..c85ea5b4dd
--- /dev/null
+++ b/src/components/TodoTemp/index.tsx
@@ -0,0 +1 @@
+export * from './TodoTemp';
diff --git a/src/types/ErrorType.ts b/src/types/ErrorType.ts
new file mode 100644
index 0000000000..1ba1cf5fa5
--- /dev/null
+++ b/src/types/ErrorType.ts
@@ -0,0 +1,8 @@
+export enum ErrorType {
+  NoErrors = '',
+  Loading = 'Unable to load todos',
+  EmptyTitle = 'Title should not be empty',
+  Add = 'Unable to add a todo',
+  Delete = 'Unable to delete a todo',
+  Update = 'Unable to update a todo',
+}
diff --git a/src/types/FilterType.ts b/src/types/FilterType.ts
new file mode 100644
index 0000000000..579c7f50ce
--- /dev/null
+++ b/src/types/FilterType.ts
@@ -0,0 +1,5 @@
+export enum FilterType {
+  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'),
+};