'use client';

import React, { useState } from 'react';
import { CheckCircle, XCircle, ChevronDown, ChevronUp, FileCode } from 'lucide-react';
import type { ToolResult } from '@/types/control-center';
import { cn } from '@/lib/utils';

interface ToolResultCardProps {
  toolResult: ToolResult;
}

// Threshold for auto-collapsing large results
const LARGE_RESULT_THRESHOLD = 500;

export const ToolResultCard: React.FC<ToolResultCardProps> = ({ toolResult }) => {
  const isError = !toolResult.success;
  const resultData = isError ? toolResult.error : toolResult.result;

  // Determine if result is large and should be collapsed by default
  const resultString = typeof resultData === 'string'
    ? resultData
    : JSON.stringify(resultData, null, 2);
  const isLargeResult = resultString.length > LARGE_RESULT_THRESHOLD;

  const [isExpanded, setIsExpanded] = useState(!isLargeResult);

  const formatResult = (data: any): string => {
    if (data === null || data === undefined) {
      return 'No result data';
    }
    if (typeof data === 'string') {
      return data;
    }
    return JSON.stringify(data, null, 2);
  };

  return (
    <div
      className={cn(
        'bg-[#E8EDF2] rounded-2xl border-2',
        'shadow-[4px_4px_8px_#c5c9d1,-4px_-4px_8px_#ffffff]',
        'transition-all duration-300',
        isError ? 'border-danger-200' : 'border-success-200'
      )}
    >
      {/* Header */}
      <div
        className="flex items-center gap-3 p-4 cursor-pointer"
        onClick={() => setIsExpanded(!isExpanded)}
      >
        {/* Status Icon */}
        <div
          className={cn(
            'p-2.5 rounded-xl',
            isError
              ? 'bg-danger-100 text-danger-600'
              : 'bg-success-100 text-success-600'
          )}
        >
          {isError ? <XCircle size={18} /> : <CheckCircle size={18} />}
        </div>

        {/* Result Info */}
        <div className="flex-1 min-w-0">
          <div className="flex items-center gap-2">
            <FileCode size={14} className="text-gray-400" />
            <span className="text-sm font-medium text-gray-600">
              Tool Result
            </span>
          </div>
          <div className="flex items-center gap-2 mt-0.5">
            <span
              className={cn(
                'text-xs font-semibold px-2 py-0.5 rounded-full',
                isError
                  ? 'bg-danger-100 text-danger-700'
                  : 'bg-success-100 text-success-700'
              )}
            >
              {isError ? 'Error' : 'Success'}
            </span>
            {!isExpanded && (
              <span className="text-xs text-gray-500 truncate">
                {resultString.substring(0, 50)}
                {resultString.length > 50 ? '...' : ''}
              </span>
            )}
          </div>
        </div>

        {/* Expand/Collapse Toggle */}
        <button
          className={cn(
            'p-1.5 rounded-lg transition-colors',
            'hover:bg-gray-200 text-gray-500'
          )}
          aria-label={isExpanded ? 'Collapse result' : 'Expand result'}
        >
          {isExpanded ? <ChevronUp size={16} /> : <ChevronDown size={16} />}
        </button>
      </div>

      {/* Collapsible Result Content */}
      {isExpanded && (
        <div className="px-4 pb-4">
          <div
            className={cn(
              'rounded-xl p-3',
              'shadow-[inset_2px_2px_4px_rgba(0,0,0,0.05),inset_-2px_-2px_4px_rgba(255,255,255,0.7)]',
              isError ? 'bg-danger-50' : 'bg-[#F5F8FA]'
            )}
          >
            <p
              className={cn(
                'text-xs font-medium uppercase tracking-wide mb-2',
                isError ? 'text-danger-600' : 'text-gray-500'
              )}
            >
              {isError ? 'Error Details' : 'Result Data'}
            </p>
            <pre
              className={cn(
                'text-xs overflow-x-auto whitespace-pre-wrap break-words font-mono max-h-64 overflow-y-auto',
                isError ? 'text-danger-700' : 'text-gray-700'
              )}
            >
              {formatResult(resultData)}
            </pre>
          </div>
        </div>
      )}
    </div>
  );
};

export default ToolResultCard;