---
import DmCard from './DmCard.astro';
import DmButton from './DmButton.astro';
import { dmTranslations as T } from '../../i18n/dm-translations';
---

<DmCard padding="md" dataTestid="notes-section">
  <textarea
    id="notes-textarea"
    class="w-full h-64 xl:h-80 2xl:h-96 bg-[var(--bg-input)] border border-[var(--border-color)] rounded-lg p-4 text-[var(--text-primary)] placeholder:text-[var(--text-muted)] focus:border-[var(--gold)] focus:ring-1 focus:ring-[var(--gold)] transition-all resize-none"
    placeholder={T.emptyNotesPlaceholder}
    data-testid="notes-textarea"
  ></textarea>

  <div class="mt-2 flex items-center justify-between">
    <span id="notes-saved-indicator" class="text-xs text-[var(--text-muted)] opacity-0 transition-opacity duration-300" data-testid="notes-saved-indicator">
      {T.actionSaved}
    </span>
    <span id="notes-char-count" class="text-xs text-[var(--text-muted)]" data-testid="notes-char-count">0</span>
  </div>

  <div class="mt-3 flex items-center justify-end gap-2">
    <DmButton id="notes-clear-btn" variant="ghost" size="sm" dataTestid="notes-clear-btn">{T.actionClear}</DmButton>
    <DmButton id="notes-copy-btn" variant="secondary" size="sm">{T.actionCopy}</DmButton>
  </div>
</DmCard>

<script>
  import { saveNotes, loadNotes, clearNotes } from '@/lib/client/notes';

  function initNotesPanel(container: HTMLElement) {
    const textarea = container.querySelector('[data-testid="notes-textarea"]') as HTMLTextAreaElement;
    const savedIndicator = container.querySelector('[data-testid="notes-saved-indicator"]') as HTMLSpanElement;
    const charCount = container.querySelector('[data-testid="notes-char-count"]') as HTMLSpanElement;
    const clearBtn = container.querySelector('[data-testid="notes-clear-btn"]') as HTMLButtonElement;
    const copyBtn = container.querySelector('#notes-copy-btn') as HTMLButtonElement;

    let debounceTimer: ReturnType<typeof setTimeout> | null = null;
    let hideIndicatorTimer: ReturnType<typeof setTimeout> | null = null;

    function formatTime(date: Date): string {
      return date.toLocaleTimeString('ru-RU', { hour: '2-digit', minute: '2-digit' });
    }

    function showSavedIndicator(message?: string) {
      const text = message || `Сохранено · ${formatTime(new Date())}`;
      savedIndicator.textContent = text;
      savedIndicator.classList.remove('opacity-0');
      if (hideIndicatorTimer) clearTimeout(hideIndicatorTimer);
      hideIndicatorTimer = setTimeout(() => {
        savedIndicator.classList.add('opacity-0');
      }, 1500);
    }

    function updateCharCount() {
      const count = textarea.value.length;
      charCount.textContent = String(count);
    }

    function loadSavedNotes() {
      const saved = loadNotes();
      textarea.value = saved;
      updateCharCount();
    }

    function handleInput() {
      updateCharCount();
      if (debounceTimer) clearTimeout(debounceTimer);
      debounceTimer = setTimeout(() => {
        saveNotes(textarea.value);
        showSavedIndicator();
      }, 500);
    }

    function handleClear() {
      textarea.value = '';
      clearNotes();
      updateCharCount();
      savedIndicator.classList.add('opacity-0');
      if (hideIndicatorTimer) clearTimeout(hideIndicatorTimer);
      if (debounceTimer) clearTimeout(debounceTimer);
      textarea.focus();
    }

    async function handleCopy() {
      const text = textarea.value;
      if (!text) return;
      try {
        await navigator.clipboard.writeText(text);
        const originalText = copyBtn.textContent || 'Скопировать';
        copyBtn.textContent = 'Скопировано!';
        setTimeout(() => {
          copyBtn.textContent = originalText;
        }, 1500);
      } catch {
        // Silently fail if clipboard is unavailable
      }
    }

    function handleStorageChange(e: StorageEvent) {
      if (e.key === 'dm-notes' && e.newValue !== null) {
        textarea.value = e.newValue;
        updateCharCount();
        showSavedIndicator('Обновлено');
      }
    }

    textarea.addEventListener('input', handleInput);
    clearBtn.addEventListener('click', handleClear);
    copyBtn.addEventListener('click', handleCopy);
    window.addEventListener('storage', handleStorageChange);

    loadSavedNotes();
  }

  document.querySelectorAll('[data-testid="notes-section"]').forEach((el) => {
    initNotesPanel(el as HTMLElement);
  });
</script>