diff --git a/js/filters.js b/js/filters.js
new file mode 100644
index 0000000..0af4b18
--- /dev/null
+++ b/js/filters.js
@@ -0,0 +1,58 @@
+import { debounce } from './util.js';
+
+const photoFilters = document.querySelector('.img-filters');
+const filterButtons = photoFilters.querySelectorAll('.img-filters__button');
+const RANDOM_PHOTOS_COUNT = 10;
+
+function applyFilter(photos, filter) {
+  switch (filter) {
+    case 'filter-random':
+      return photos
+        .slice()
+        .sort(() => Math.random() - 0.5)
+        .slice(0, RANDOM_PHOTOS_COUNT);
+    case 'filter-discussed':
+      return photos
+        .slice()
+        .sort((a, b) => b.comments.length - a.comments.length);
+    default:
+      return photos;
+  }
+}
+
+export function initFilters(photos, renderThumbnails) {
+  photoFilters.classList.remove('img-filters--inactive');
+
+  let selectedFilter = null;
+
+  const applyDebouncedFilter = debounce(() => {
+    if (selectedFilter) {
+      clearThumbnails();
+      const filteredPhotos = applyFilter(photos, selectedFilter);
+      renderThumbnails(filteredPhotos);
+    }
+  }, 500);
+
+  filterButtons.forEach((button) => {
+    button.addEventListener('click', (evt) => {
+      // Удаляем класс активности у всех кнопок
+      filterButtons.forEach((btn) => btn.classList.remove('img-filters__button--active'));
+
+      // Устанавливаем класс активности для текущей кнопки
+      evt.target.classList.add('img-filters__button--active');
+
+      // Сохраняем выбранный фильтр
+      selectedFilter = evt.target.id;
+
+      // Запускаем отложенное применение фильтра
+      applyDebouncedFilter();
+    });
+  });
+}
+
+
+function clearThumbnails() {
+  const pictures = document.querySelectorAll('.picture');
+  pictures.forEach((picture) => picture.remove());
+}
+
diff --git a/js/form-api.js b/js/form-api.js
new file mode 100644
index 0000000..ae43857
--- /dev/null
+++ b/js/form-api.js
@@ -0,0 +1,116 @@
+import { photos } from './photos.js';
+// import { renderThumbnails } from './thumbnails.js';
+import { pristine, currentEffect, resetForm } from './form.js';
+
+export const uploadForm = document.querySelector('.img-upload__form');
+export const fileInput = uploadForm.querySelector('.img-upload__input');
+export const hashtagInput = uploadForm.querySelector('.text__hashtags');
+export const descriptionInput = uploadForm.querySelector('.text__description');
+
+
+// --------- Форма и создание поста ---------
+
+uploadForm.addEventListener('submit', (evt) => {
+  evt.preventDefault();
+  const isValid = pristine.validate();
+  if (isValid) {
+    const formData = new FormData(uploadForm);
+    const submitButton = uploadForm.querySelector('.img-upload__submit');
+    submitButton.disabled = true; // Блокируем кнопку
+
+    fetch('https://29.javascript.htmlacademy.pro/kekstagram', {
+      method: 'POST',
+      body: formData,
+    })
+      .then((response) => {
+        if (response.ok) {
+          // Добавляем новую фотографию с эффектом
+          const newPhoto = {
+            id: photos.length + 1,
+            url: URL.createObjectURL(fileInput.files[0]),
+            description: descriptionInput.value || 'Новое фото',
+            likes: 0,
+            comments: [],
+            effect: currentEffect // Сохраняем текущий эффект
+          };
+          photos.push(newPhoto); // Добавляем фото в массив
+          // renderThumbnails([newPhoto]); // Добавляем миниатюру
+
+          showSuccessMessage(); // Показ успешного сообщения
+          resetForm();
+        } else {
+          throw new Error('Ошибка отправки данных');
+        }
+      })
+      .catch(() => {
+        showErrorMessage(); // Показ сообщения об ошибке
+      })
+      .finally(() => {
+        submitButton.disabled = false; // Разблокируем кнопку
+      });
+  }
+});
+
+// --------- Обработчики успеха и ошибок ---------
+
+function showSuccessMessage() {
+  const successTemplate = document.querySelector('#success').content;
+  const successElement = successTemplate.cloneNode(true);
+  document.body.appendChild(successElement);
+
+  const closeButton = document.querySelector('.success__button');
+  const successOverlay = document.querySelector('.success');
+
+  function closeSuccess() {
+    successOverlay.remove();
+    document.removeEventListener('keydown', onKeydownSuccess);
+    document.removeEventListener('click', onClickOutsideSuccess);
+  }
+
+  function onKeydownSuccess(evt) {
+    if (evt.key === 'Escape') {
+      closeSuccess();
+    }
+  }
+
+  function onClickOutsideSuccess(evt) {
+    if (evt.target === successOverlay) {
+      closeSuccess();
+    }
+  }
+
+  closeButton.addEventListener('click', closeSuccess);
+  document.addEventListener('keydown', onKeydownSuccess);
+  document.addEventListener('click', onClickOutsideSuccess);
+}
+
+function showErrorMessage() {
+  const errorTemplate = document.querySelector('#error').content;
+  const errorElement = errorTemplate.cloneNode(true);
+  document.body.appendChild(errorElement);
+
+  const closeButton = document.querySelector('.error__button');
+  const errorOverlay = document.querySelector('.error');
+
+  function closeError() {
+    errorOverlay.remove();
+    document.removeEventListener('keydown', onKeydownError);
+    document.removeEventListener('click', onClickOutsideError);
+  }
+
+  function onKeydownError(evt) {
+    if (evt.key === 'Escape') {
+      closeError();
+    }
+  }
+
+  function onClickOutsideError(evt) {
+    if (evt.target === errorOverlay) {
+      closeError();
+    }
+  }
+
+  closeButton.addEventListener('click', closeError);
+  document.addEventListener('keydown', onKeydownError);
+  document.addEventListener('click', onClickOutsideError);
+}
diff --git a/js/photos.js b/js/photos.js
new file mode 100644
index 0000000..84884aa
--- /dev/null
+++ b/js/photos.js
@@ -0,0 +1,3 @@
+import { generatePhotos } from './data.js';
+
+export const photos = generatePhotos();
diff --git a/js/thumbnails.js b/js/thumbnails.js
new file mode 100644
index 0000000..8a49cea
--- /dev/null
+++ b/js/thumbnails.js
@@ -0,0 +1,42 @@
+import { openBigPicture } from './big-picture.js';
+
+const thumbnailTemplate = document.querySelector('#picture').content.querySelector('.picture');
+
+function createThumbnail(photoData) {
+  const thumbnail = thumbnailTemplate.cloneNode(true);
+  const img = thumbnail.querySelector('.picture__img');
+  img.src = photoData.url;
+  img.alt = photoData.description;
+
+  thumbnail.querySelector('.picture__likes').textContent = photoData.likes;
+  thumbnail.querySelector('.picture__comments').textContent = photoData.comments.length;
+
+  thumbnail.addEventListener('click', () => {
+    openBigPicture(photoData); // Открываем большое изображение
+  });
+
+  return thumbnail;
+}
+
+function renderThumbnails(photoArray) {
+  const thumbnailContainer = document.querySelector('.pictures');
+
+  photoArray.forEach((photo) => {
+    const thumbnailElement = createThumbnail(photo);
+    thumbnailElement.querySelector('.picture__img').src = photo.url;
+    thumbnailElement.querySelector('.picture__likes').textContent = photo.likes;
+    thumbnailElement.querySelector('.picture__comments').textContent = photo.comments.length;
+
+    // Применяем эффект к миниатюре
+    if (photo.effect && photo.effect !== 'none') {
+      thumbnailElement.querySelector('.picture__img').classList.add(`effects__preview--${photo.effect}`);
+    }
+
+    thumbnailContainer.appendChild(thumbnailElement);
+  });
+}
+
+
+export { renderThumbnails };
+
+