solution

src/App.tsx

@@ -1,156 +1,49 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useEffect, useState } from 'react';
+import { Todo } from './types/Todo';
+import { FilterTypes } from './types/FilterType';
+import Header from './Components/Header';
+import TodoList from './Components/TodoList';
+import Footer from './Components/Footer';
+import { useTodoContext } from './Context/TodoProvider';
 
 export const App: React.FC = () => {
+  const { todoItems } = useTodoContext();
+  const [todosToShow, setTodosToShow] = useState<Todo[]>([]);
+  const [selectedFilter, setSelectedFilter] = useState<FilterTypes>(
+    FilterTypes.ALL,
+  );
+
+  useEffect(() => {
+    setTodosToShow(
+      todoItems.filter(todo => {
+        switch (selectedFilter) {
+          case FilterTypes.ACTIVE:
+            return !todo.completed;
+          case FilterTypes.COMPLETED:
+            return todo.completed;
+          default:
+            return true;
+        }
+      }),
+    );
+  }, [todoItems, selectedFilter]);
+
   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>
+        <Header />
 
-          {/* 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>
+        <TodoList todosToShow={todosToShow} />
+        {todoItems.length > 0 && (
+          <Footer
+            selectedFilter={selectedFilter}
+            setSelectedFilter={setSelectedFilter}
+          />
+        )}
       </div>
     </div>
   );

src/Components/Footer.tsx

@@ -0,0 +1,56 @@
+import React from 'react';
+import { FilterTypes } from '../types/FilterType';
+import cn from 'classnames';
+import { useTodoContext } from '../Context/TodoProvider';
+
+type FooterProps = {
+  selectedFilter: FilterTypes;
+  setSelectedFilter: (filter: FilterTypes) => void;
+};
+
+const Footer: React.FC<FooterProps> = ({
+  selectedFilter,
+  setSelectedFilter,
+}) => {
+  const { todoItems, clearCompletedTodos } = useTodoContext();
+
+  const countItemsLeft = todoItems.reduce((accumulator, value) => {
+    return accumulator + (value.completed ? 0 : 1);
+  }, 0);
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {countItemsLeft} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(FilterTypes).map(filter => (
+          <a
+            key={filter}
+            href={`#/${filter}`}
+            className={cn('filter__link', {
+              selected: selectedFilter === filter,
+            })}
+            data-cy={`FilterLink${filter.charAt(0).toUpperCase() + filter.slice(1)}`}
+            onClick={() => setSelectedFilter(filter as FilterTypes)}
+          >
+            {filter.charAt(0).toUpperCase() + filter.slice(1)}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        onClick={() => clearCompletedTodos()}
+        disabled={!todoItems.some(todo => todo.completed)}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
+
+export default Footer;

src/Components/Header.tsx

@@ -0,0 +1,66 @@
+import React, { useState } from 'react';
+import cn from 'classnames';
+import { useTodoContext } from '../Context/TodoProvider';
+
+const Header: React.FC = () => {
+  const { todoItems, addTodo, setTodoItems } = useTodoContext();
+  const [newTodoTitle, setNewTodoTitle] = useState<string>('');
+
+  const addTodoFunc = (e: React.FormEvent<HTMLFormElement>, title: string) => {
+    e.preventDefault();
+    addTodo(title);
+    setNewTodoTitle('');
+  };
+
+  const handleToggleAll = async () => {
+    if (
+      !todoItems.some(todo => todo.completed) ||
+      !todoItems.some(todo => !todo.completed)
+    ) {
+      setTodoItems(
+        todoItems.map(todo => ({
+          ...todo,
+          completed: !todo.completed,
+        })),
+      );
+
+      return;
+    } else {
+      setTodoItems(
+        todoItems.map(todo => ({
+          ...todo,
+          completed: true,
+        })),
+      );
+    }
+  };
+
+  return (
+    <header className="todoapp__header">
+      {todoItems.length > 0 && (
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', {
+            active: todoItems.every(todo => todo.completed),
+          })}
+          data-cy="ToggleAllButton"
+          onClick={handleToggleAll}
+        />
+      )}
+
+      <form onSubmit={e => addTodoFunc(e, newTodoTitle)}>
+        <input
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          value={newTodoTitle}
+          onChange={e => setNewTodoTitle(e.target.value)}
+          autoFocus
+        />
+      </form>
+    </header>
+  );
+};
+
+export default Header;