diff --git a/src/App.tsx b/src/App.tsx
index 5749bdf78..12c94cd58 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,24 +1,50 @@
-/* eslint-disable max-len */
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
-import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import React, { useEffect, useState } from 'react';
+import { TodoHeader } from './components/TodoHeader';
+import { TodoList } from './components/TodoList';
+import { TodoFooter } from './components/TodoFooter';
+import { TodoNotification } from './components/TodoNotification';
+import { useTodo } from './context/TodoContext';
+import { getTodos } from './api/todos';
+import { useError } from './context/ErrorContext';
+import { USER_ID } from './utils/variables';
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
-    return <UserWarning />;
-  }
+  const { todos, setTodos } = useTodo();
+  const { setErrorMessage } = useError();
+
+  const [isActive, setIsActive] = useState(false);
+  const [isToggleActive, setIsToggleActive] = useState<number[]>([]);
+
+  useEffect(() => {
+    getTodos(USER_ID)
+      .then(setTodos)
+      .catch(() => {
+        setErrorMessage('Unable to load todos');
+      });
+  }, []);
 
   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">
+        <TodoHeader
+          onHandleActive={setIsActive}
+          onToggleActive={setIsToggleActive}
+        />
+
+        <TodoList
+          isActive={isActive}
+          onHandleActive={setIsActive}
+          isToggleActive={isToggleActive}
+        />
+
+        {Boolean(todos.length) && (
+          <TodoFooter />
+        )}
+      </div>
+
+      <TodoNotification />
+    </div>
   );
 };
diff --git a/src/UserWarning.tsx b/src/UserWarning.tsx
deleted file mode 100644
index db7dd16e3..000000000
--- a/src/UserWarning.tsx
+++ /dev/null
@@ -1,22 +0,0 @@
-import React from 'react';
-
-export const UserWarning: React.FC = () => (
-  <section className="section">
-    <p className="box is-size-3">
-      Please get your
-      {' '}
-      <b> userId </b>
-      {' '}
-      <a href="https://mate-academy.github.io/react_student-registration">
-        here
-      </a>
-      {' '}
-      and save it in the app
-      {' '}
-      <pre>const USER_ID = ...</pre>
-
-      All requests to the API must be sent with this
-      <b> userId.</b>
-    </p>
-  </section>
-);
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 000000000..7624419fb
--- /dev/null
+++ b/src/api/todos.ts
@@ -0,0 +1,20 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const getTodos = (userId: number) => {
+  return client.get<Todo[]>(`/todos?userId=${userId}`);
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const createTodo = ({
+  userId, title, completed,
+}: Omit<Todo, 'id'>) => {
+  return client.post<Todo>('/todos', { userId, title, completed });
+};
+
+export const updateTodo = (todoId: number, todo: Partial<Todo>) => {
+  return client.patch<Todo>(`/todos/${todoId}`, todo);
+};
diff --git a/src/components/TodoEditItem/TodoEditItem.tsx b/src/components/TodoEditItem/TodoEditItem.tsx
new file mode 100644
index 000000000..54ba86f73
--- /dev/null
+++ b/src/components/TodoEditItem/TodoEditItem.tsx
@@ -0,0 +1,130 @@
+import {
+  useEffect, useRef, useState,
+} from 'react';
+import classnames from 'classnames';
+import { Todo } from '../../types/Todo';
+import { useTodo } from '../../context/TodoContext';
+import { useError } from '../../context/ErrorContext';
+import { updateTodo } from '../../api/todos';
+
+type Props = {
+  todo: Todo;
+  onEditedId: () => void;
+  onDelete: (value: Todo) => void;
+  isLoading: boolean;
+  onLoad: (value: boolean) => void;
+};
+
+export const TodoEditItem: React.FC<Props> = ({
+  todo, onEditedId, onDelete, isLoading, onLoad,
+}) => {
+  const { id, completed } = todo;
+
+  const { todos, setTodos } = useTodo();
+  const { setErrorMessage } = useError();
+
+  const editInputRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    editInputRef.current?.focus();
+  }, []);
+
+  const [newTitle, setNewTitle] = useState(todo.title);
+
+  const updateNewTodo = () => {
+    if (!newTitle.trim()) {
+      onDelete(todo);
+
+      return;
+    }
+
+    const updatedTodos = todos.map((currentTodo) => {
+      if (currentTodo.id === id) {
+        return {
+          ...currentTodo,
+          title: newTitle,
+        };
+      }
+
+      return currentTodo;
+    });
+
+    const updatedTodo = updatedTodos.find(({ id: updatedId }) => {
+      return updatedId === id;
+    });
+
+    onLoad(true);
+
+    if (updatedTodo) {
+      updateTodo(todo.id, updatedTodo)
+        .then(() => setTodos(updatedTodos))
+        .catch(() => setErrorMessage('Unable to update a todo'))
+        .finally(() => {
+          onLoad(false);
+          onEditedId();
+        });
+    }
+  };
+
+  const handlePressEscape = (
+    event: React.KeyboardEvent<HTMLInputElement>,
+  ) => {
+    if (event.key === 'Escape') {
+      onEditedId();
+    }
+  };
+
+  const handleEditTodo = (
+    event: React.FormEvent<HTMLFormElement>
+    | React.FocusEvent<HTMLInputElement, Element>,
+  ) => {
+    event.preventDefault();
+
+    if (todo.title === newTitle) {
+      onEditedId();
+
+      return;
+    }
+
+    updateNewTodo();
+  };
+
+  return (
+    <div data-cy="Todo" className="todo">
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={completed}
+        />
+      </label>
+
+      <form onSubmit={handleEditTodo}>
+        <input
+          ref={editInputRef}
+          data-cy="TodoTitleField"
+          type="text"
+          className="todo__title-field"
+          placeholder="Empty todo will be deleted"
+          value={newTitle}
+          onChange={(event) => setNewTitle(event.target.value)}
+          onBlur={handleEditTodo}
+          onKeyUp={handlePressEscape}
+        />
+      </form>
+
+      <div
+        data-cy="TodoLoader"
+        className={classnames(
+          'modal overlay', {
+            'is-active': isLoading,
+          },
+        )}
+      >
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </div>
+  );
+};
diff --git a/src/components/TodoEditItem/index.ts b/src/components/TodoEditItem/index.ts
new file mode 100644
index 000000000..d9de65de4
--- /dev/null
+++ b/src/components/TodoEditItem/index.ts
@@ -0,0 +1 @@
+export * from './TodoEditItem';
diff --git a/src/components/TodoFooter/TodoFooter.tsx b/src/components/TodoFooter/TodoFooter.tsx
new file mode 100644
index 000000000..09d050d9e
--- /dev/null
+++ b/src/components/TodoFooter/TodoFooter.tsx
@@ -0,0 +1,98 @@
+import { useMemo } from 'react';
+import classnames from 'classnames';
+import { Status } from '../../types/Status';
+import { useFilter } from '../../context/FilterContext';
+import { useTodo } from '../../context/TodoContext';
+import { deleteTodo } from '../../api/todos';
+import { useError } from '../../context/ErrorContext';
+
+export const TodoFooter = () => {
+  const { selectedFilter, setSelectedFilter } = useFilter();
+  const { todos, setTodos } = useTodo();
+  const { setErrorMessage } = useError();
+
+  const isActiveItemsLeft = todos
+    .filter(({ completed }) => !completed).length;
+
+  const hasCompletedTodo = useMemo(() => {
+    return todos.some(todo => todo.completed);
+  }, [todos]);
+
+  const clearCompleted = () => {
+    const deletePromises = todos
+      .filter((todo) => todo.completed)
+      .map(({ id }) => deleteTodo(id));
+
+    Promise.all(deletePromises)
+      .then(() => {
+        setTodos((prevState) => prevState.filter((todo) => !todo.completed));
+      })
+      .catch(() => {
+        setErrorMessage('Unable to delete a todo');
+      });
+  };
+
+  return (
+    <footer data-cy="Footer" className="todoapp__footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {isActiveItemsLeft > 1
+          ? `${isActiveItemsLeft} items left`
+          : `${isActiveItemsLeft} item left`}
+      </span>
+
+      <nav data-cy="Filter" className="filter">
+        <a
+          data-cy="FilterLinkAll"
+          href="#/"
+          className={classnames(
+            'filter__link',
+            {
+              selected: selectedFilter === Status.All,
+            },
+          )}
+          onClick={() => setSelectedFilter(Status.All)}
+        >
+          All
+        </a>
+
+        <a
+          data-cy="FilterLinkActive"
+          href="#/active"
+          className={classnames(
+            'filter__link',
+            {
+              selected: selectedFilter === Status.Active,
+            },
+          )}
+          onClick={() => setSelectedFilter(Status.Active)}
+        >
+          Active
+        </a>
+
+        <a
+          data-cy="FilterLinkCompleted"
+          href="#/completed"
+          className={classnames(
+            'filter__link',
+            {
+              selected: selectedFilter === Status.Completed,
+            },
+          )}
+          onClick={() => setSelectedFilter(Status.Completed)}
+        >
+          Completed
+        </a>
+      </nav>
+
+      <button
+        data-cy="ClearCompletedButton"
+        type="button"
+        className="todoapp__clear-completed"
+        disabled={!hasCompletedTodo}
+        onClick={clearCompleted}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/TodoFooter/index.ts b/src/components/TodoFooter/index.ts
new file mode 100644
index 000000000..544d07114
--- /dev/null
+++ b/src/components/TodoFooter/index.ts
@@ -0,0 +1 @@
+export * from './TodoFooter';
diff --git a/src/components/TodoHeader/TodoHeader.tsx b/src/components/TodoHeader/TodoHeader.tsx
new file mode 100644
index 000000000..8e7288303
--- /dev/null
+++ b/src/components/TodoHeader/TodoHeader.tsx
@@ -0,0 +1,138 @@
+import {
+  useEffect,
+  useRef,
+  useState,
+} from 'react';
+import classnames from 'classnames';
+
+import { useTodo } from '../../context/TodoContext';
+import { useError } from '../../context/ErrorContext';
+import { useTodoTemp } from '../../context/TodoTempContext';
+import { USER_ID } from '../../utils/variables';
+import { createTodo, updateTodo } from '../../api/todos';
+import { Todo } from '../../types/Todo';
+
+type Props = {
+  onHandleActive: (value: boolean) => void;
+  onToggleActive: (value: number[]) => void;
+};
+
+export const TodoHeader: React.FC<Props> = ({
+  onHandleActive, onToggleActive,
+}) => {
+  const { setTodoTemp } = useTodoTemp();
+  const [title, setTitle] = useState('');
+  const { todos, setTodos } = useTodo();
+  const { errorMessage, setErrorMessage } = useError();
+
+  const [isInputDisabled, setIsInputDisabled] = useState(false);
+
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  const isActiveItemsLeft = todos.some(({ completed }) => !completed);
+
+  useEffect(() => {
+    inputRef?.current?.focus();
+  }, [todos, errorMessage]);
+
+  const toggleAll = async () => {
+    const isAllCompleted = todos.every(({ completed }) => completed);
+    const todosForUpdate = isAllCompleted
+      ? todos
+      : todos.filter(({ completed }) => !completed);
+    const todosIds = todosForUpdate.map(({ id }) => id);
+    const updatePromises = todos.map(todo => (
+      updateTodo(todo.id, { ...todo, completed: !isAllCompleted })
+    ));
+
+    onToggleActive(todosIds);
+
+    try {
+      await Promise.all(updatePromises);
+
+      setTodos(currentTodos => {
+        return currentTodos.map(todo => ({
+          ...todo,
+          completed: !isAllCompleted,
+        }));
+      });
+
+      onToggleActive([]);
+    } catch (error) {
+      setErrorMessage(`Error updating todos: ${error}`);
+    }
+  };
+
+  const handleSubmit = (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+
+    if (!title.trim()) {
+      setErrorMessage('Title should not be empty');
+      inputRef?.current?.focus();
+
+      return;
+    }
+
+    const newTodo = {
+      userId: USER_ID,
+      title: title.trim(),
+      completed: false,
+    };
+
+    setTodoTemp({
+      ...newTodo,
+      id: 0,
+    });
+
+    setIsInputDisabled(true);
+    onHandleActive(true);
+
+    createTodo(newTodo)
+      .then((response) => {
+        setTodos((prevTodos: Todo[]) => [...prevTodos, response]);
+        setIsInputDisabled(false);
+        setTitle('');
+      })
+      .catch(() => {
+        setIsInputDisabled(false);
+        setErrorMessage('Unable to add a todo');
+      })
+      .finally(() => {
+        setTodoTemp(null);
+        inputRef?.current?.focus();
+        onHandleActive(false);
+      });
+  };
+
+  return (
+    <header className="todoapp__header">
+      {!!todos.length && (
+        <button
+          type="button"
+          aria-label="toggle all"
+          className={classnames(
+            'todoapp__toggle-all',
+            {
+              active: !isActiveItemsLeft,
+            },
+          )}
+          data-cy="ToggleAllButton"
+          onClick={toggleAll}
+        />
+      )}
+
+      <form onSubmit={handleSubmit}>
+        <input
+          disabled={isInputDisabled}
+          ref={inputRef}
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          value={title}
+          onChange={(event) => setTitle(event.target.value)}
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/TodoHeader/index.ts b/src/components/TodoHeader/index.ts
new file mode 100644
index 000000000..c4db4bc40
--- /dev/null
+++ b/src/components/TodoHeader/index.ts
@@ -0,0 +1 @@
+export * from './TodoHeader';
diff --git a/src/components/TodoItem/TodoItem.tsx b/src/components/TodoItem/TodoItem.tsx
new file mode 100644
index 000000000..c3ef4ca47
--- /dev/null
+++ b/src/components/TodoItem/TodoItem.tsx
@@ -0,0 +1,109 @@
+import { useState } from 'react';
+import classnames from 'classnames';
+import { Todo } from '../../types/Todo';
+import { useTodo } from '../../context/TodoContext';
+import { updateTodo } from '../../api/todos';
+import { useError } from '../../context/ErrorContext';
+
+type Props = {
+  todo: Todo;
+  onDelete?: (value: Todo) => void;
+  onEditedId?: (value: number | null) => void;
+  isDeleteActive?: boolean;
+  onDeleteActive?: (value: boolean) => void;
+  isLoading?: boolean;
+  isToggleActive?: number[];
+};
+
+export const TodoItem: React.FC<Props> = ({
+  todo,
+  onDelete = () => {},
+  onEditedId = () => {},
+  isDeleteActive,
+  isLoading,
+  isToggleActive,
+}) => {
+  const { setTodos } = useTodo();
+  const { setErrorMessage } = useError();
+  const { id, title, completed } = todo;
+
+  const [deletedTodoId, setDeletedTodoId] = useState<number | null>(null);
+
+  const [isCompleteActive, setIsCompleteActive] = useState(false);
+
+  const handleComplete = (
+    event: React.ChangeEvent<HTMLInputElement>,
+  ) => {
+    const updatedTodo = { ...todo, completed: event.target.checked };
+
+    setIsCompleteActive(true);
+
+    updateTodo(todo.id, updatedTodo)
+      .then(() => {
+        setTodos((prevTodo) => prevTodo.map((currentTodo) => {
+          return currentTodo.id === todo.id ? updatedTodo : currentTodo;
+        }));
+      })
+      .catch(() => setErrorMessage('Unable to update todo'))
+      .finally(() => setIsCompleteActive(false));
+  };
+
+  const handleDelete = () => {
+    setDeletedTodoId(todo.id);
+    onDelete(todo);
+  };
+
+  const isActiveLoader = (isDeleteActive && id === deletedTodoId)
+  || isToggleActive?.includes(id) || isCompleteActive || isLoading;
+
+  return (
+    <div
+      data-cy="Todo"
+      className={classnames(
+        'todo',
+        {
+          completed,
+        },
+      )}
+    >
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={completed}
+          onChange={handleComplete}
+        />
+      </label>
+
+      <span
+        data-cy="TodoTitle"
+        className="todo__title"
+        onDoubleClick={() => onEditedId(id)}
+      >
+        {title}
+      </span>
+
+      <button
+        type="button"
+        className="todo__remove"
+        data-cy="TodoDelete"
+        onClick={handleDelete}
+      >
+        ×
+      </button>
+
+      <div
+        data-cy="TodoLoader"
+        className={classnames(
+          'modal overlay', {
+            'is-active': isActiveLoader,
+          },
+        )}
+      >
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </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..3923f2615
--- /dev/null
+++ b/src/components/TodoList/TodoList.tsx
@@ -0,0 +1,81 @@
+import { useState } from 'react';
+
+import { getFilteredTodos } from '../../utils/utils';
+import { TodoItem } from '../TodoItem';
+import { useTodo } from '../../context/TodoContext';
+import { useFilter } from '../../context/FilterContext';
+import { useTodoTemp } from '../../context/TodoTempContext';
+import { deleteTodo } from '../../api/todos';
+import { useError } from '../../context/ErrorContext';
+import { TodoEditItem } from '../TodoEditItem';
+import { Todo } from '../../types/Todo';
+
+type Props = {
+  isActive: boolean;
+  onHandleActive?: (value: boolean) => void;
+  isToggleActive: number[];
+};
+
+export const TodoList: React.FC<Props> = ({
+  isActive, isToggleActive,
+}) => {
+  const { todos, setTodos } = useTodo();
+  const { selectedFilter } = useFilter();
+  const { todoTemp } = useTodoTemp();
+  const { setErrorMessage } = useError();
+
+  const filteredTodos = getFilteredTodos(todos, selectedFilter);
+
+  const [isLoading, setIsLoading] = useState(false);
+  const [editedId, setEditedId] = useState<number | null>(null);
+  const [isDeleteActive, setIsDeleteActive] = useState(false);
+
+  const handleDeleteTodo = (todo: Todo) => {
+    setIsLoading(true);
+    setIsDeleteActive(true);
+
+    deleteTodo(todo.id)
+      .then(() => {
+        setTodos(todos.filter(({ id }) => id !== todo.id));
+      })
+      .catch(() => {
+        setErrorMessage('Unable to delete a todo');
+      })
+      .finally(() => {
+        setIsLoading(false);
+        setIsDeleteActive(false);
+      });
+  };
+
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      {filteredTodos.map(todo => (
+        editedId === todo.id ? (
+          <TodoEditItem
+            key={todo.id}
+            todo={todo}
+            onEditedId={() => setEditedId(null)}
+            onDelete={handleDeleteTodo}
+            isLoading={isLoading}
+            onLoad={setIsLoading}
+          />
+        ) : (
+          <TodoItem
+            key={todo.id}
+            todo={todo}
+            onDelete={handleDeleteTodo}
+            onEditedId={setEditedId}
+            isDeleteActive={isDeleteActive}
+            onDeleteActive={setIsDeleteActive}
+            isToggleActive={isToggleActive}
+            isLoading={isLoading}
+          />
+        )
+      ))}
+
+      {todoTemp && (
+        <TodoItem isLoading={isActive} todo={todoTemp} />
+      )}
+    </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/components/TodoNotification/TodoNotification.tsx b/src/components/TodoNotification/TodoNotification.tsx
new file mode 100644
index 000000000..1b563cc83
--- /dev/null
+++ b/src/components/TodoNotification/TodoNotification.tsx
@@ -0,0 +1,42 @@
+import classnames from 'classnames';
+import { useEffect } from 'react';
+import { useError } from '../../context/ErrorContext';
+
+export const TodoNotification: React.FC = () => {
+  const {
+    errorMessage,
+    isErrorHidden,
+    setIsErrorHidden,
+  } = useError();
+
+  useEffect(() => {
+    if (errorMessage.length) {
+      setIsErrorHidden(false);
+    }
+
+    setTimeout(() => {
+      setIsErrorHidden(true);
+    }, 3000);
+  }, [errorMessage]);
+
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={classnames(
+        'notification is-danger is-light has-text-weight-normal',
+        {
+          hidden: isErrorHidden,
+        },
+      )}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        aria-label="Delete"
+        onClick={() => setIsErrorHidden(true)}
+      />
+      {errorMessage}
+    </div>
+  );
+};
diff --git a/src/components/TodoNotification/index.ts b/src/components/TodoNotification/index.ts
new file mode 100644
index 000000000..f29aba7e0
--- /dev/null
+++ b/src/components/TodoNotification/index.ts
@@ -0,0 +1 @@
+export * from './TodoNotification';
diff --git a/src/context/ErrorContext.tsx b/src/context/ErrorContext.tsx
new file mode 100644
index 000000000..b5a6b0ead
--- /dev/null
+++ b/src/context/ErrorContext.tsx
@@ -0,0 +1,43 @@
+import {
+  useState, createContext, useContext,
+} from 'react';
+
+interface ErrorContextType {
+  errorMessage: string;
+  setErrorMessage: React.Dispatch<React.SetStateAction<string>>;
+  isErrorHidden: boolean;
+  setIsErrorHidden: React.Dispatch<React.SetStateAction<boolean>>;
+}
+
+export const ErrorContext = createContext<ErrorContextType>({
+  errorMessage: '',
+  setErrorMessage: () => {},
+  isErrorHidden: true,
+  setIsErrorHidden: () => {},
+});
+
+type Props = {
+  children: React.ReactNode;
+};
+
+export const ErrorProvider: React.FC<Props> = ({ children }) => {
+  const [errorMessage, setErrorMessage] = useState('');
+  const [isErrorHidden, setIsErrorHidden] = useState(true);
+
+  const value = {
+    errorMessage,
+    setErrorMessage,
+    isErrorHidden,
+    setIsErrorHidden,
+  };
+
+  return (
+    <ErrorContext.Provider value={value}>
+      {children}
+    </ErrorContext.Provider>
+  );
+};
+
+export const useError = (): ErrorContextType => {
+  return useContext(ErrorContext);
+};
diff --git a/src/context/FilterContext.tsx b/src/context/FilterContext.tsx
new file mode 100644
index 000000000..962be3892
--- /dev/null
+++ b/src/context/FilterContext.tsx
@@ -0,0 +1,35 @@
+import { useState, createContext, useContext } from 'react';
+import { Status } from '../types/Status';
+
+interface FilterContextType {
+  selectedFilter: Status;
+  setSelectedFilter: React.Dispatch<React.SetStateAction<Status>>;
+}
+
+export const FilterContext = createContext<FilterContextType>({
+  selectedFilter: Status.All,
+  setSelectedFilter: () => {},
+});
+
+type Props = {
+  children: React.ReactNode;
+};
+
+export const FilterProvider: React.FC<Props> = ({ children }) => {
+  const [selectedFilter, setSelectedFilter] = useState<Status>(Status.All);
+
+  const value = {
+    selectedFilter,
+    setSelectedFilter,
+  };
+
+  return (
+    <FilterContext.Provider value={value}>
+      {children}
+    </FilterContext.Provider>
+  );
+};
+
+export const useFilter = (): FilterContextType => {
+  return useContext(FilterContext);
+};
diff --git a/src/context/TodoContext.tsx b/src/context/TodoContext.tsx
new file mode 100644
index 000000000..2fcb714c7
--- /dev/null
+++ b/src/context/TodoContext.tsx
@@ -0,0 +1,37 @@
+import {
+  useState, createContext, useContext,
+} from 'react';
+import { Todo } from '../types/Todo';
+
+interface TodoContextType {
+  todos: Todo[];
+  setTodos: React.Dispatch<React.SetStateAction<Todo[]>>;
+}
+
+export const TodoContext = createContext<TodoContextType>({
+  todos: [],
+  setTodos: () => {},
+});
+
+type Props = {
+  children: React.ReactNode;
+};
+
+export const TodoProvider: React.FC<Props> = ({ children }) => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+
+  const value = {
+    todos,
+    setTodos,
+  };
+
+  return (
+    <TodoContext.Provider value={value}>
+      {children}
+    </TodoContext.Provider>
+  );
+};
+
+export const useTodo = (): TodoContextType => {
+  return useContext(TodoContext);
+};
diff --git a/src/context/TodoTempContext.tsx b/src/context/TodoTempContext.tsx
new file mode 100644
index 000000000..7b03a0c4a
--- /dev/null
+++ b/src/context/TodoTempContext.tsx
@@ -0,0 +1,37 @@
+import {
+  useState, createContext, useContext,
+} from 'react';
+import { Todo } from '../types/Todo';
+
+interface TodoTempContextType {
+  todoTemp: Todo | null;
+  setTodoTemp: React.Dispatch<React.SetStateAction<Todo | null>>;
+}
+
+export const TodoTempContext = createContext<TodoTempContextType>({
+  todoTemp: null,
+  setTodoTemp: () => {},
+});
+
+type Props = {
+  children: React.ReactNode;
+};
+
+export const TodoTempProvider: React.FC<Props> = ({ children }) => {
+  const [todoTemp, setTodoTemp] = useState<Todo | null>(null);
+
+  const value = {
+    todoTemp,
+    setTodoTemp,
+  };
+
+  return (
+    <TodoTempContext.Provider value={value}>
+      {children}
+    </TodoTempContext.Provider>
+  );
+};
+
+export const useTodoTemp = (): TodoTempContextType => {
+  return useContext(TodoTempContext);
+};
diff --git a/src/index.tsx b/src/index.tsx
index 7de19e0c7..5dce46795 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -5,6 +5,20 @@ import '@fortawesome/fontawesome-free/css/all.css';
 import './styles/index.scss';
 
 import { App } from './App';
+import { TodoProvider } from './context/TodoContext';
+import { FilterProvider } from './context/FilterContext';
+import { ErrorProvider } from './context/ErrorContext';
+import { TodoTempProvider } from './context/TodoTempContext';
 
 createRoot(document.getElementById('root') as HTMLDivElement)
-  .render(<App />);
+  .render(
+    <TodoProvider>
+      <TodoTempProvider>
+        <FilterProvider>
+          <ErrorProvider>
+            <App />
+          </ErrorProvider>
+        </FilterProvider>
+      </TodoTempProvider>
+    </TodoProvider>,
+  );
diff --git a/src/styles/todoapp.scss b/src/styles/todoapp.scss
index 836166156..2db666227 100644
--- a/src/styles/todoapp.scss
+++ b/src/styles/todoapp.scss
@@ -129,5 +129,9 @@
     &:active {
       text-decoration: none;
     }
+
+    &:disabled {
+      visibility: hidden;
+    }
   }
 }
diff --git a/src/types/Status.ts b/src/types/Status.ts
new file mode 100644
index 000000000..2ec4b8714
--- /dev/null
+++ b/src/types/Status.ts
@@ -0,0 +1,5 @@
+export enum Status {
+  All = 'all',
+  Active = 'active',
+  Completed = 'completed',
+}
diff --git a/src/types/Todo.ts b/src/types/Todo.ts
new file mode 100644
index 000000000..3f52a5fdd
--- /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 000000000..ccf6f6cb6
--- /dev/null
+++ b/src/utils/fetchClient.ts
@@ -0,0 +1,47 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+const BASE_URL = 'https://mate.academy/students-api';
+// https://mate.academy/students-api/todos?userId=11458
+
+// 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',
+    };
+  }
+
+  // we wait for testing purpose to see loaders
+  return wait(300)
+    .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'),
+};
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
new file mode 100644
index 000000000..096baeed7
--- /dev/null
+++ b/src/utils/utils.ts
@@ -0,0 +1,19 @@
+import { Status } from '../types/Status';
+import { Todo } from '../types/Todo';
+
+export const getFilteredTodos = (todos: Todo[], selectedFilter: Status) => {
+  const todosCopy = [...todos];
+
+  if (selectedFilter) {
+    switch (selectedFilter) {
+      case Status.Active:
+        return todosCopy.filter(({ completed }) => !completed);
+      case Status.Completed:
+        return todosCopy.filter(({ completed }) => completed);
+      default:
+        return todosCopy;
+    }
+  }
+
+  return todosCopy;
+};
diff --git a/src/utils/variables.ts b/src/utils/variables.ts
new file mode 100644
index 000000000..3dbfce90f
--- /dev/null
+++ b/src/utils/variables.ts
@@ -0,0 +1 @@
+export const USER_ID = 11458;