'use client';

import { ReactNode, useEffect, useRef } from 'react';
import { X } from 'lucide-react';
import { cn } from '@/lib/utils';

interface ModalProps {
  isOpen: boolean;
  onClose: () => void;
  title: string;
  children: ReactNode;
  size?: 'sm' | 'md' | 'lg' | 'xl';
}

const sizeClasses = {
  sm: 'max-w-md',
  md: 'max-w-lg',
  lg: 'max-w-2xl',
  xl: 'max-w-4xl',
};

export default function Modal({ isOpen, onClose, title, children, size = 'md' }: ModalProps) {
  const panelRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    document.body.style.overflow = isOpen ? 'hidden' : 'unset';
    return () => { document.body.style.overflow = 'unset'; };
  }, [isOpen]);

  useEffect(() => {
    if (!isOpen) return;
    const onKey = (e: KeyboardEvent) => { if (e.key === 'Escape') onClose(); };
    document.addEventListener('keydown', onKey);
    return () => document.removeEventListener('keydown', onKey);
  }, [isOpen, onClose]);

  if (!isOpen) return null;

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center p-4">
      {/* Backdrop */}
      <div
        className="fixed inset-0 bg-black/60 backdrop-blur-sm transition-opacity"
        onClick={onClose}
      />

      {/* Panel */}
      <div
        ref={panelRef}
        className={cn(
          'relative w-full flex flex-col max-h-[90vh] z-10',
          'bg-background rounded-2xl shadow-2xl border border-border/50',
          'animate-fade-up',
          sizeClasses[size],
        )}
      >
        {/* Accent bar */}
        <div className="h-1 w-full rounded-t-2xl bg-gradient-to-r from-[rgb(20,113,76)] to-emerald-400" />

        {/* Header */}
        <div className="flex items-center justify-between px-6 py-4 border-b border-border/60">
          <h2 className="text-lg font-semibold text-foreground tracking-tight">{title}</h2>
          <button
            onClick={onClose}
            className="flex items-center justify-center w-8 h-8 rounded-lg text-muted-foreground hover:text-foreground hover:bg-muted transition-colors"
            aria-label="Close"
          >
            <X className="h-4 w-4" />
          </button>
        </div>

        {/* Body */}
        <div className="overflow-y-auto flex-1 px-6 py-5">
          {children}
        </div>
      </div>
    </div>
  );
}