import { useState, useEffect } from 'react';
import { getDataValidationObject, type DataValidationObjectResponse } from '../services/api';
import { useAuthStore } from '../stores/authStore';

interface ObjectDetailModalProps {
  objectId: string | null;
  onClose: () => void;
  onObjectClick?: (objectId: string) => void;
  onBack?: () => void;
  canGoBack?: boolean;
}

interface ObjectReference {
  objectId: string;
  objectKey: string;
  label: string;
}

function isObjectReference(value: any): value is ObjectReference {
  return value && typeof value === 'object' && 'objectId' in value;
}

function formatValue(value: any): string {
  if (value === null || value === undefined) return '—';
  if (typeof value === 'boolean') return value ? 'Ja' : 'Nee';
  if (typeof value === 'object') {
    if (Array.isArray(value)) {
      if (value.length === 0) return '—';
      return value.map(v => formatValue(v)).join(', ');
    }
    if (isObjectReference(value)) {
      return value.label || value.objectKey || value.objectId;
    }
    return JSON.stringify(value);
  }
  return String(value);
}

export default function ObjectDetailModal({ objectId, onClose, onObjectClick, onBack, canGoBack = false }: ObjectDetailModalProps) {
  const [objectData, setObjectData] = useState<DataValidationObjectResponse | null>(null);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const { config } = useAuthStore();

  useEffect(() => {
    if (!objectId) {
      setObjectData(null);
      return;
    }

    const loadObject = async () => {
      setLoading(true);
      setError(null);
      try {
        const data = await getDataValidationObject(objectId);
        setObjectData(data);
      } catch (err) {
        setError(err instanceof Error ? err.message : 'Failed to load object');
      } finally {
        setLoading(false);
      }
    };

    loadObject();
  }, [objectId]);

  if (!objectId) return null;

  const handleReferenceClick = (ref: ObjectReference, e: React.MouseEvent) => {
    e.stopPropagation();
    if (onObjectClick) {
      onObjectClick(ref.objectId);
    }
  };

  const handleBack = () => {
    if (onBack) {
      onBack();
    }
  };

  const renderAttributeValue = (key: string, value: any) => {
    // Skip internal/system fields
    if (key.startsWith('_')) return null;

    // Handle reference fields
    if (isObjectReference(value)) {
      return (
        <button
          onClick={(e) => handleReferenceClick(value, e)}
          className="inline-flex items-center gap-1.5 text-sm font-medium text-blue-600 hover:text-blue-800 hover:underline transition-colors"
        >
          <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13.828 10.172a4 4 0 00-5.656 0l-4 4a4 4 0 105.656 5.656l1.102-1.101m-.758-4.899a4 4 0 005.656 0l4-4a4 4 0 00-5.656-5.656l-1.1 1.1" />
          </svg>
          {value.label || value.objectKey || value.objectId}
        </button>
      );
    }

    // Handle arrays of references
    if (Array.isArray(value) && value.length > 0 && isObjectReference(value[0])) {
      return (
        <div className="flex flex-wrap gap-3">
          {value.map((ref, idx) => (
            <button
              key={idx}
              onClick={(e) => handleReferenceClick(ref, e)}
              className="inline-flex items-center gap-1.5 text-sm font-medium text-blue-600 hover:text-blue-800 hover:underline transition-colors"
            >
              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13.828 10.172a4 4 0 00-5.656 0l-4 4a4 4 0 105.656 5.656l1.102-1.101m-.758-4.899a4 4 0 005.656 0l4-4a4 4 0 00-5.656-5.656l-1.1 1.1" />
              </svg>
              {ref.label || ref.objectKey || ref.objectId}
            </button>
          ))}
        </div>
      );
    }

    // Regular values
    return <span className="text-gray-900 font-medium">{formatValue(value)}</span>;
  };

  return (
    <div className="fixed inset-0 z-50 overflow-y-auto">
      {/* Backdrop */}
      <div
        className="fixed inset-0 bg-black/70 backdrop-blur-sm transition-opacity animate-in fade-in"
        onClick={onClose}
      />

      {/* Modal */}
      <div className="flex min-h-full items-center justify-center p-4">
        <div
          className="relative bg-white rounded-2xl shadow-2xl border border-gray-200 max-w-5xl w-full max-h-[90vh] overflow-hidden flex flex-col animate-in slide-in-from-bottom-4 duration-300"
          onClick={(e) => e.stopPropagation()}
        >
          {/* Header */}
          <div className="px-8 py-6 border-b border-gray-200 bg-gradient-to-r from-gray-50 to-white flex items-center justify-between">
            <div className="flex items-center gap-4 flex-1">
              {/* Back Button */}
              {canGoBack && onBack && (
                <button
                  onClick={handleBack}
                  className="p-2.5 text-gray-600 hover:text-gray-900 hover:bg-gray-200 rounded-xl transition-all hover:shadow-md"
                  title="Terug naar vorig object"
                >
                  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 19l-7-7 7-7" />
                  </svg>
                </button>
              )}
              <div className="flex-1">
                {loading ? (
                  <div className="flex items-center gap-3">
                    <div className="w-5 h-5 border-2 border-blue-600 border-t-transparent rounded-full animate-spin" />
                    <h2 className="text-xl font-bold text-gray-900">Laden...</h2>
                  </div>
                ) : objectData ? (
                  <div>
                    <div className="flex items-center gap-3 mb-2">
                      <div className="w-10 h-10 bg-gradient-to-br from-blue-500 to-blue-600 rounded-xl flex items-center justify-center shadow-lg">
                        <svg className="w-5 h-5 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                        </svg>
                      </div>
                      <h2 className="text-xl font-bold text-gray-900">{objectData.metadata.label}</h2>
                    </div>
                    <div className="flex items-center gap-4 mt-1 text-sm text-gray-600">
                      <span className="font-mono bg-gray-100 px-2 py-1 rounded-md">{objectData.metadata.objectKey}</span>
                      <span className="text-gray-300">•</span>
                      <span className="font-semibold">{objectData.metadata.typeDisplayName}</span>
                    </div>
                  </div>
                ) : (
                  <h2 className="text-xl font-bold text-gray-900">Object Details</h2>
                )}
              </div>
            </div>
            <div className="flex items-center gap-2">
              {/* Jira Assets Link */}
              {objectData && config?.jiraHost && (
                <a
                  href={`${config.jiraHost}/secure/insight/assets/${objectData.metadata.objectKey}`}
                  target="_blank"
                  rel="noopener noreferrer"
                  className="p-2.5 text-blue-600 hover:text-blue-700 hover:bg-blue-50 rounded-xl transition-all"
                  title="Open in Jira Assets"
                >
                  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14" />
                  </svg>
                </a>
              )}
              <button
                onClick={onClose}
                className="p-2.5 text-gray-400 hover:text-gray-600 hover:bg-gray-100 rounded-xl transition-all"
              >
                <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
                </svg>
              </button>
            </div>
          </div>

          {/* Content */}
          <div className="flex-1 overflow-y-auto px-8 py-6 bg-gray-50/30">
            {error ? (
              <div className="bg-red-50 border-2 border-red-200 rounded-xl p-6 text-center">
                <svg className="w-16 h-16 text-red-400 mx-auto mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" />
                </svg>
                <p className="text-red-600 font-semibold">{error}</p>
              </div>
            ) : objectData ? (
              <div className="space-y-6">
                {/* Basic Info */}
                <div>
                  <h3 className="text-sm font-bold text-gray-700 uppercase tracking-wider mb-4 flex items-center gap-2">
                    <div className="w-1 h-5 bg-gradient-to-b from-blue-500 to-blue-600 rounded-full"></div>
                    Basis Informatie
                  </h3>
                  <div className="bg-white rounded-xl border border-gray-200 p-6 shadow-sm">
                    <div className="grid grid-cols-2 gap-6">
                      <div>
                        <div className="text-xs font-semibold text-gray-500 uppercase tracking-wider mb-2">ID</div>
                        <div className="text-sm font-mono text-gray-900 bg-gray-50 px-3 py-2 rounded-lg border border-gray-200">{objectData.metadata.objectKey}</div>
                      </div>
                      <div>
                        <div className="text-xs font-semibold text-gray-500 uppercase tracking-wider mb-2">Type</div>
                        <div className="text-sm font-semibold text-gray-900 bg-gray-50 px-3 py-2 rounded-lg border border-gray-200">{objectData.metadata.typeDisplayName}</div>
                      </div>
                    </div>
                  </div>
                </div>

                {/* Attributes */}
                <div>
                  <h3 className="text-sm font-bold text-gray-700 uppercase tracking-wider mb-4 flex items-center gap-2">
                    <div className="w-1 h-5 bg-gradient-to-b from-blue-500 to-blue-600 rounded-full"></div>
                    Attributen
                  </h3>
                  <div className="bg-white rounded-xl border border-gray-200 overflow-hidden shadow-sm">
                    <table className="min-w-full divide-y divide-gray-200">
                      <thead className="bg-gradient-to-r from-gray-50 to-gray-100">
                        <tr>
                          <th className="px-6 py-4 text-left text-xs font-bold text-gray-700 uppercase tracking-wider">
                            Attribuut
                          </th>
                          <th className="px-6 py-4 text-left text-xs font-bold text-gray-700 uppercase tracking-wider">
                            Waarde
                          </th>
                        </tr>
                      </thead>
                      <tbody className="bg-white divide-y divide-gray-100">
                        {Object.entries(objectData.object as Record<string, any>)
                          .filter(([key]) => !key.startsWith('_'))
                          .sort(([a], [b]) => a.localeCompare(b))
                          .map(([key, value]) => {
                            const renderedValue = renderAttributeValue(key, value);
                            if (renderedValue === null) return null;
                            
                            return (
                              <tr key={key} className="hover:bg-blue-50/30 transition-colors">
                                <td className="px-6 py-4 whitespace-nowrap text-sm font-semibold text-gray-700">
                                  {key}
                                </td>
                                <td className="px-6 py-4 text-sm">
                                  {renderedValue}
                                </td>
                              </tr>
                            );
                          })}
                        {Object.entries(objectData.object as Record<string, any>)
                          .filter(([key]) => !key.startsWith('_')).length === 0 && (
                          <tr>
                            <td colSpan={2} className="px-6 py-12 text-center text-sm text-gray-500">
                              <svg className="w-12 h-12 mx-auto mb-3 text-gray-300" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M20 13V6a2 2 0 00-2-2H6a2 2 0 00-2 2v7m16 0v5a2 2 0 01-2 2H6a2 2 0 01-2-2v-5m16 0h-2.586a1 1 0 00-.707.293l-2.414 2.414a1 1 0 01-.707.293h-3.172a1 1 0 01-.707-.293l-2.414-2.414A1 1 0 006.586 13H4" />
                              </svg>
                              Geen attributen beschikbaar
                            </td>
                          </tr>
                        )}
                      </tbody>
                    </table>
                  </div>
                </div>

                {/* Metadata */}
                {objectData.object && typeof objectData.object === 'object' && '_jiraUpdatedAt' in objectData.object && (
                  <div>
                    <h3 className="text-sm font-bold text-gray-700 uppercase tracking-wider mb-4 flex items-center gap-2">
                      <div className="w-1 h-5 bg-gradient-to-b from-blue-500 to-blue-600 rounded-full"></div>
                      Metadata
                    </h3>
                    <div className="bg-white rounded-xl border border-gray-200 p-6 shadow-sm">
                      {objectData.object._jiraUpdatedAt && (
                        <div className="grid grid-cols-2 gap-6">
                          <div>
                            <div className="text-xs font-semibold text-gray-500 uppercase tracking-wider mb-2">Laatst bijgewerkt (Jira)</div>
                            <div className="text-sm font-medium text-gray-900 bg-gray-50 px-3 py-2 rounded-lg border border-gray-200">
                              {new Date(objectData.object._jiraUpdatedAt).toLocaleString('nl-NL')}
                            </div>
                          </div>
                          {objectData.object._jiraCreatedAt && (
                            <div>
                              <div className="text-xs font-semibold text-gray-500 uppercase tracking-wider mb-2">Aangemaakt (Jira)</div>
                              <div className="text-sm font-medium text-gray-900 bg-gray-50 px-3 py-2 rounded-lg border border-gray-200">
                                {new Date(objectData.object._jiraCreatedAt).toLocaleString('nl-NL')}
                              </div>
                            </div>
                          )}
                        </div>
                      )}
                    </div>
                  </div>
                )}
              </div>
            ) : (
              <div className="text-center py-16 text-gray-500">
                <div className="w-12 h-12 border-4 border-blue-600 border-t-transparent rounded-full animate-spin mx-auto mb-4" />
                <p className="font-medium">Laden van object details...</p>
              </div>
            )}
          </div>

          {/* Footer */}
          <div className="px-8 py-5 border-t border-gray-200 bg-gradient-to-r from-gray-50 to-white flex justify-end">
            <button
              onClick={onClose}
              className="px-6 py-2.5 text-sm font-semibold text-gray-700 bg-white border-2 border-gray-300 rounded-xl hover:bg-gray-50 hover:border-gray-400 transition-all shadow-sm hover:shadow-md"
            >
              Sluiten
            </button>
          </div>
        </div>
      </div>
    </div>
  );
}