import React, { useEffect } from 'react';
import { CatalogModuleItem, READINESS_CONFIG, AVAILABILITY_CONFIG } from './catalogData';
import { Button } from '../../shared/ui/Button';
import { Badge } from '../../shared/ui/Badge';
import { MaturityBadge } from '../../shared/ui/MaturityBadge';
import {
  X,
  ArrowRight,
  CheckCircle2,
  Layers,
  Link2,
  ShieldCheck,
  Target,
} from 'lucide-react';
import { useNavigate } from 'react-router-dom';

export interface ModuleInfoModalProps {
  module: CatalogModuleItem | null;
  isOpen: boolean;
  onClose: () => void;
}

export const ModuleInfoModal: React.FC<ModuleInfoModalProps> = ({ module, isOpen, onClose }) => {
  const navigate = useNavigate();

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

  if (!isOpen || !module) return null;

  const readinessInfo = READINESS_CONFIG[module.readiness];
  const availabilityInfo = AVAILABILITY_CONFIG[module.availability];

  const handleOpenModule = () => {
    onClose();
    navigate(module.route);
  };

  return (
    <div
      className="fixed inset-0 z-50 flex items-center justify-center p-4"
      role="dialog"
      aria-modal="true"
      aria-labelledby="module-info-title"
      data-testid="module-info-modal"
    >
      {/* Backdrop */}
      <div
        className="fixed inset-0 bg-black/60 backdrop-blur-xs animate-fade-in"
        onClick={onClose}
      />

      {/* Modal Card */}
      <div className="relative bg-krona-surface border border-krona-border rounded-2xl max-w-2xl w-full max-h-[90vh] overflow-y-auto shadow-krona-modal z-10 animate-scale-in p-6 space-y-6">
        {/* Header */}
        <div className="flex items-start justify-between gap-4 border-b border-krona-border/70 pb-4">
          <div className="space-y-1.5">
            <div className="flex items-center gap-2 flex-wrap">
              <span className="text-xs uppercase font-bold tracking-wider text-krona-gold">
                Информация о модуле
              </span>
              <MaturityBadge level={readinessInfo.maturity} size="sm" />
              <Badge variant={availabilityInfo.variant} size="sm">
                {availabilityInfo.label}
              </Badge>
            </div>
            <h2 id="module-info-title" className="text-xl font-bold text-krona-primary">
              {module.title}
            </h2>
            <p className="text-xs text-krona-secondary">
              {module.description}
            </p>
          </div>

          <button
            onClick={onClose}
            className="p-1.5 rounded-lg text-krona-secondary hover:text-krona-primary hover:bg-krona-workspace transition-colors"
            title="Закрыть (Esc)"
            data-testid="close-module-info-modal"
          >
            <X className="w-5 h-5" />
          </button>
        </div>

        {/* Section 1: Purpose */}
        <div className="space-y-2">
          <div className="flex items-center gap-2 text-xs font-bold text-krona-primary uppercase tracking-wider">
            <Target className="w-4 h-4 text-krona-green" />
            <span>1. Назначение модуля</span>
          </div>
          <div className="p-3 bg-krona-workspace rounded-xl border border-krona-border text-xs text-krona-primary leading-relaxed">
            {module.details.purpose}
          </div>
        </div>

        {/* Section 2: Expected Capabilities */}
        <div className="space-y-2">
          <div className="flex items-center gap-2 text-xs font-bold text-krona-primary uppercase tracking-wider">
            <Layers className="w-4 h-4 text-krona-gold" />
            <span>2. Ключевые функциональные возможности</span>
          </div>
          <div className="grid grid-cols-1 sm:grid-cols-2 gap-2">
            {module.details.expectedCapabilities.map((cap, idx) => (
              <div
                key={idx}
                className="p-2.5 rounded-xl border border-krona-border bg-krona-surface text-xs text-krona-primary flex items-start gap-2"
              >
                <CheckCircle2 className="w-4 h-4 text-krona-green shrink-0 mt-0.5" />
                <span>{cap}</span>
              </div>
            ))}
          </div>
        </div>

        {/* Section 3: Current Status */}
        <div className="space-y-2">
          <div className="flex items-center gap-2 text-xs font-bold text-krona-primary uppercase tracking-wider">
            <ShieldCheck className="w-4 h-4 text-sky-500" />
            <span>3. Статус реализации</span>
          </div>
          <div className="p-3 rounded-xl border border-sky-500/30 bg-sky-500/10 text-xs text-sky-900 dark:text-sky-200 leading-relaxed">
            <strong>{readinessInfo.label}:</strong> {module.details.currentStatus}
          </div>
        </div>

        {/* Section 4: Planned Integrations */}
        <div className="space-y-2">
          <div className="flex items-center gap-2 text-xs font-bold text-krona-primary uppercase tracking-wider">
            <Link2 className="w-4 h-4 text-purple-500" />
            <span>4. Запланированные интеграции</span>
          </div>
          <div className="flex flex-wrap gap-2">
            {module.details.plannedIntegrations.map((integ, idx) => (
              <span
                key={idx}
                className="px-2.5 py-1 text-xs rounded-lg border border-krona-border bg-krona-workspace text-krona-primary font-medium"
              >
                {integ}
              </span>
            ))}
          </div>
        </div>

        {/* Footer Actions */}
        <div className="flex items-center justify-between pt-4 border-t border-krona-border/70">
          <span className="text-[11px] text-krona-secondary">
            Маршрут в системе: <code className="font-mono text-krona-primary">{module.route}</code>
          </span>

          <div className="flex items-center gap-2">
            <Button variant="secondary" size="sm" onClick={onClose}>
              Закрыть
            </Button>
            <Button
              variant="primary"
              size="sm"
              onClick={handleOpenModule}
              data-testid={`modal-open-module-${module.id}`}
            >
              <span>Перейти в модуль</span>
              <ArrowRight className="w-3.5 h-3.5 ml-1" />
            </Button>
          </div>
        </div>
      </div>
    </div>
  );
};