//
// Copyright (c) 2025 rustmailer.com (https://rustmailer.com)
//
// This file is part of the Bichon Email Archiving Project
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

import { useRef } from 'react';
import { X, Trash2 } from 'lucide-react';
import { cn } from '@/lib/utils';
import { Badge } from '@/components/ui/badge';
import { Button } from '@/components/ui/button';
import { Separator } from '@/components/ui/separator';
import {
  Tooltip,
  TooltipTrigger,
  TooltipContent,
} from '@/components/ui/tooltip';
import { useMailboxContext } from '../context';
import { useTranslation } from 'react-i18next';

type MailBulkActionsProps = {
  children?: React.ReactNode;
};

export function MailBulkActions({ children }: MailBulkActionsProps) {
  const { t } = useTranslation();
  const { selected, setSelected, setOpen, setDeleteIds } = useMailboxContext();
  const toolbarRef = useRef<HTMLDivElement>(null);
  const selectedCount = selected.size;

  const handleClearSelection = () => {
    setSelected(new Set<number>());
  };

  const handleDelete = () => {
    setDeleteIds(new Set(selected));
    setSelected(new Set());
    setOpen('move-to-trash');
  };

  const handleKeyDown = (e: React.KeyboardEvent) => {
    const buttons = toolbarRef.current?.querySelectorAll('button');
    if (!buttons || buttons.length === 0) return;

    const currentIndex = Array.from(buttons).findIndex(
      (btn) => btn === document.activeElement
    );

    switch (e.key) {
      case 'ArrowRight': {
        e.preventDefault();
        const next = (currentIndex + 1) % buttons.length;
        buttons[next]?.focus();
        break;
      }
      case 'ArrowLeft': {
        e.preventDefault();
        const prev = currentIndex === 0 ? buttons.length - 1 : currentIndex - 1;
        buttons[prev]?.focus();
        break;
      }
      case 'Home':
        e.preventDefault();
        buttons[0]?.focus();
        break;
      case 'End':
        e.preventDefault();
        buttons[buttons.length - 1]?.focus();
        break;
      case 'Escape': {
        const target = e.target as HTMLElement;
        const active = document.activeElement as HTMLElement;
        const isFromDropdown =
          target.closest('[data-slot="dropdown-menu-trigger"]') ||
          active.closest('[data-slot="dropdown-menu-trigger"]') ||
          target.closest('[data-slot="dropdown-menu-content"]') ||
          active.closest('[data-slot="dropdown-menu-content"]');

        if (!isFromDropdown) {
          e.preventDefault();
          handleClearSelection();
        }
        break;
      }
    }
  };

  if (selectedCount === 0) return null;

  return (
    <>
      <div
        ref={toolbarRef}
        role="toolbar"
        aria-label={t('mailbox.bulkActions.ariaLabel', {
          count: selectedCount,
          emailLabel: selectedCount > 1 ? t('mailbox.bulkActions.emails') : t('mailbox.bulkActions.email')
        })}
        tabIndex={-1}
        onKeyDown={handleKeyDown}
        className={cn(
          'fixed bottom-6 left-1/2 z-50 -translate-x-1/2 rounded-xl',
          'transition-all delay-100 duration-300 ease-out hover:scale-105',
          'focus-visible:ring-ring/50 focus-visible:ring-2 focus-visible:outline-none'
        )}
      >
        <div
          className={cn(
            'p-2 shadow-xl rounded-xl border',
            'bg-background/95 supports-[backdrop-filter]:bg-background/60 backdrop-blur-lg',
            'flex items-center gap-x-2'
          )}
        >
          <Tooltip>
            <TooltipTrigger asChild>
              <Button
                variant="outline"
                size="icon"
                onClick={handleClearSelection}
                className="size-6 rounded-full"
                aria-label={t('mailbox.bulkActions.clearSelection')}
              >
                <X className="h-3 w-3" />
                <span className="sr-only">{t('mailbox.bulkActions.clearSelection')}</span>
              </Button>
            </TooltipTrigger>
            <TooltipContent>{t('mailbox.bulkActions.clearSelectionWithKey', { key: 'Escape' })}</TooltipContent>
          </Tooltip>

          <Separator orientation="vertical" className="h-5" />
          <div className="flex items-center gap-x-1 text-sm" id="bulk-actions-desc">
            <Badge variant="default" className="min-w-8 rounded-lg">
              {selectedCount}
            </Badge>{' '}
            <span className="hidden sm:inline">
              {selectedCount > 1 ? t('mailbox.bulkActions.emails') : t('mailbox.bulkActions.email')}
            </span>{' '}
            {t('mailbox.bulkActions.selected')}
          </div>

          <Separator orientation="vertical" className="h-5" />
          <Tooltip>
            <TooltipTrigger asChild>
              <Button
                variant="destructive"
                size="sm"
                onClick={handleDelete}
                className="gap-1"
              >
                <Trash2 className="h-3.5 w-3.5" />
                <span className="hidden sm:inline">{t('mailbox.bulkActions.delete')}</span>
              </Button>
            </TooltipTrigger>
            <TooltipContent>{t('mailbox.bulkActions.deleteTooltip')}</TooltipContent>
          </Tooltip>
          {children}
        </div>
      </div>
    </>
  );
}