import { state }           from './state.js';
import * as history from './history.js';
import {
  updateSelCount, updateNumberBadges,
  updateNewNameLabels, refreshCardSelection,
} from './grid.js';
import { doRename }         from './rename.js';
import { handleFolderDrop } from './move.js';
import { initModalControls } from './modal.js';
import { buildSequentialName, getNameFormat } from './utils/file-names.js';
import { initKeyboardShortcuts } from './keyboard.js';
import { createFolderController } from './folder-controller.js';
import { createHistoryController } from './history-controller.js';
import * as deleteHandler   from './delete.js';
import * as pinchZoom       from './handlers/pinch-zoom.js';
import * as selection       from './handlers/selection.js';
import * as dragDrop        from './handlers/drag-drop.js';
import * as hoverPreview    from './handlers/image-preview.js';
import * as fileExplorer    from './handlers/file-explorer.js';
import * as sidebarResize   from './handlers/sidebar-resize.js';
import { log } from './logger.js';

// ── DOM ──────────────────────────────────────────────
const btnOpen          = document.getElementById('btn-open');
const btnSortName      = document.getElementById('btn-sort-name');
const btnSortDate      = document.getElementById('btn-sort-date');
const btnRename        = document.getElementById('btn-rename');
const inputPrefix      = document.getElementById('input-prefix');
const inputDigits      = document.getElementById('input-digits');
const inputPostfix     = document.getElementById('input-postfix');
const previewName      = document.getElementById('preview-name');
const dirPath          = document.getElementById('dir-path');
const rubberBand       = document.getElementById('rubber-band');
const grid             = document.getElementById('grid');
const gridContainer    = document.getElementById('grid-container');
const dragGhostEl      = document.getElementById('drag-ghost');
const thumbSizeHint    = document.getElementById('thumb-size-hint');
const btnPreviewToggle = document.getElementById('btn-preview-toggle');
const btnUndo          = document.getElementById('btn-undo');
const btnRedo          = document.getElementById('btn-redo');
const fileExplorerContainer = document.querySelector('.file-explorer');
const aside            = document.querySelector('aside');
const sidebarResizer   = document.getElementById('sidebar-resizer');

const folderController = createFolderController({
  btnRename,
  btnSortName,
  btnSortDate,
  dirPath,
  inputPrefix,
  updatePreview,
});
const historyController = createHistoryController({
  btnRename,
  btnUndo,
  btnRedo,
  updateSortButtons: folderController.updateSortButtons,
});

// ── 핸들러 초기화 ─────────────────────────────────
history.setOnUpdate(historyController.updateButtons);
initModalControls();

const callbacks = {
  refreshCardSelection, updateSelCount, updateNumberBadges, updateNewNameLabels,
  pushHistory: (affectedPaths) => history.pushReorder(state.files, affectedPaths),
};

selection.init({ gridContainer, rubberBand, grid, state, callbacks });
dragDrop.init({ grid, gridContainer, dragGhostEl, state, callbacks, fileExplorerEl: fileExplorerContainer, onFolderDrop: handleFolderDrop });
hoverPreview.init();
deleteHandler.init(grid);
fileExplorer.init(fileExplorerContainer, folderController.loadFolder);

window.api.onFullscreenChange((isFullscreen) => {
  document.body.classList.toggle('fullscreen', isFullscreen);
});

// ── 앱 시작 ───────────────────────────────────────
(async () => {
  log('startup', 'init start');
  const [lastFolder, homeDir, previewOn, sidebarWidth, thumbSize] = await Promise.all([
    window.api.getLastFolder(),
    window.api.getHomeDir(),
    window.api.getPreviewOn(),
    window.api.getSidebarWidth(),
    window.api.getThumbSize(),
  ]);
  log('startup', 'settings loaded', { lastFolder, homeDir, previewOn, sidebarWidth, thumbSize });
  folderController.setHomeDir(homeDir);

  btnPreviewToggle.classList.toggle('active', previewOn);
  hoverPreview.setEnabled(previewOn);
  sidebarResize.init({
    aside,
    handle: sidebarResizer,
    initialWidth: sidebarWidth,
    onResizeEnd: width => window.api.setSidebarWidth(width),
  });
  pinchZoom.init({
    gridContainer,
    thumbSizeHint,
    initialSize: thumbSize,
    onChange: size => window.api.setThumbSize(size),
  });

  const target = lastFolder || homeDir;
  log('startup', 'initial folder target', { target, fromLastFolder: Boolean(lastFolder) });
  await fileExplorer.loadTree(homeDir, target);
  await folderController.loadFolder(target);
  log('startup', 'init done');
})();

// ── 버튼 / 키보드 이벤트 ─────────────────────────
inputPrefix.addEventListener('input', updatePreview);
inputDigits.addEventListener('input', updatePreview);
inputPostfix.addEventListener('input', updatePreview);
btnOpen.addEventListener('click', () => {
  log('ui', 'open button clicked');
  folderController.openFolder();
});
btnSortName.addEventListener('click', () => folderController.sortFiles('name'));
btnSortDate.addEventListener('click', () => folderController.sortFiles('date'));
btnRename.addEventListener('click', doRename);
btnUndo.addEventListener('click', historyController.performUndo);
btnRedo.addEventListener('click', historyController.performRedo);
btnPreviewToggle.addEventListener('click', () => {
  const on = btnPreviewToggle.classList.toggle('active');
  hoverPreview.setEnabled(on);
  window.api.setPreviewOn(on);
});

initKeyboardShortcuts({
  btnOpen,
  btnRename,
  btnPreviewToggle,
  deleteSelected: deleteHandler.deleteSelected,
  performUndo: historyController.performUndo,
  performRedo: historyController.performRedo,
  refreshSelection: () => {
    refreshCardSelection();
    updateSelCount();
  },
  selectAll: () => state.files.forEach((_, i) => state.selectedIdxs.add(i)),
});

// ── 포맷 미리보기 ─────────────────────────────────
function updatePreview() {
  const format = getNameFormat(inputPrefix, inputDigits, 3, inputPostfix);
  const fileName = state.files[0]?.name || 'preview.jpg';
  previewName.textContent = buildSequentialName(fileName, 0, format);
  updateNewNameLabels();
}