import * as React from 'react';
import { ChevronLeft, ChevronRight, X } from 'lucide-react';
import { cn } from '@/lib/utils';
import { Button } from './button';
import { Card } from './card';

export interface SidebarProps {
  /**
   * Content to display in the sidebar
   */
  children: React.ReactNode;
  
  /**
   * Position of the sidebar
   * @default 'left'
   */
  position?: 'left' | 'right';
  
  /**
   * Width of the sidebar when open
   * @default 'w-64'
   */
  width?: string;
  
  /**
   * Whether the sidebar is open
   * @default true
   */
  open?: boolean;
  
  /**
   * Callback when open state changes
   */
  onOpenChange?: (open: boolean) => void;
  
  /**
   * Whether the sidebar is collapsible
   * @default true
   */
  collapsible?: boolean;
  
  /**
   * Title/header for the sidebar
   */
  title?: React.ReactNode;
  
  /**
   * Optional icon to display next to the title
   */
  icon?: React.ReactNode;
  
  /**
   * Additional CSS classes for the container
   */
  className?: string;
  
  /**
   * Additional CSS classes for the sidebar content
   */
  contentClassName?: string;
  
  /**
   * Whether to show a backdrop on mobile when open
   * @default true
   */
  showBackdrop?: boolean;
}

/**
 * Sidebar - Reusable sidebar component for filters and content
 * 
 * A generic sidebar component that can be used to display filters,
 * additional content, or any sidebar-worthy information. Supports
 * collapsible functionality and positioning.
 * 
 * @example
 * ```tsx
 * <Sidebar title="Filters" position="left" collapsible>
 *   <div>Filter content here</div>
 * </Sidebar>
 * ```
 * 
 * @example
 * ```tsx
 * <Sidebar
 *   title="Filters"
 *   icon={<Filter />}
 *   position="right"
 *   open={isOpen}
 *   onOpenChange={setIsOpen}
 *   width="w-80"
 * >
 *   <FilterContent />
 * </Sidebar>
 * ```
 */
export function Sidebar({
  children,
  position = 'left',
  width = 'w-64',
  open: controlledOpen,
  onOpenChange,
  collapsible = true,
  title,
  icon,
  className,
  contentClassName,
  showBackdrop = true,
}: SidebarProps) {
  const [uncontrolledOpen, setUncontrolledOpen] = React.useState(true);
  
  // Use controlled state if provided, otherwise use uncontrolled
  const isOpen = controlledOpen !== undefined ? controlledOpen : uncontrolledOpen;
  
  const handleToggle = () => {
    const newOpen = !isOpen;
    if (controlledOpen === undefined) {
      setUncontrolledOpen(newOpen);
    }
    onOpenChange?.(newOpen);
  };
  
  const ChevronIcon = position === 'left' ? ChevronLeft : ChevronRight;
  const isCollapsed = collapsible && !isOpen;
  
  return (
    <>
      {/* Mobile Backdrop */}
      {showBackdrop && isOpen && (
        <div
          className="fixed inset-0 bg-black/60 backdrop-blur-sm lg:hidden z-40"
          onClick={handleToggle}
          aria-hidden="true"
        />
      )}
      
      <aside
        className={cn(
          'flex flex-col transition-all duration-[var(--duration-normal)] ease-in-out',
          position === 'left' ? 'border-r' : 'border-l',
          'border-white/10 bg-kodo-ink/40 backdrop-blur-md rounded-xl',
          isCollapsed ? 'w-0 overflow-hidden' : width,
          className,
        )}
      >
        {/* Header */}
        {(title || collapsible) && (
          <div className="flex items-center justify-between p-4 border-b border-white/10">
            {title && (
              <div className="flex items-center gap-2 flex-1">
                {icon && <div className="text-kodo-steel">{icon}</div>}
                <h3 className="text-sm font-semibold text-white">{title}</h3>
              </div>
            )}
            {collapsible && (
              <Button
                variant="ghost"
                size="icon"
                onClick={handleToggle}
                className="h-8 w-8"
                aria-label={isOpen ? 'Collapse sidebar' : 'Expand sidebar'}
              >
                <ChevronIcon className={cn(
                  'w-4 h-4 transition-transform',
                  isOpen && position === 'right' && 'rotate-180',
                  isOpen && position === 'left' && 'rotate-180',
                )} />
              </Button>
            )}
          </div>
        )}
        
        {/* Content */}
        <div
          className={cn(
            'flex-1 overflow-y-auto custom-scrollbar',
            isCollapsed && 'hidden',
            contentClassName,
          )}
        >
          {children}
        </div>
      </aside>
    </>
  );
}

/**
 * SidebarCard - Sidebar with Card styling
 * 
 * A sidebar variant that wraps content in a Card for consistent styling.
 */
export interface SidebarCardProps extends Omit<SidebarProps, 'children'> {
  /**
   * Content to display in the sidebar card
   */
  children: React.ReactNode;
}

export function SidebarCard({
  children,
  className,
  contentClassName,
  ...sidebarProps
}: SidebarCardProps) {
  return (
    <Sidebar
      className={cn('p-0', className)}
      contentClassName={cn('p-4', contentClassName)}
      {...sidebarProps}
    >
      <Card className="border-0 bg-transparent shadow-none">
        {children}
      </Card>
    </Sidebar>
  );
}