import React, { useState } from 'react';
import { toast } from 'react-toastify';
import nodeService from '../../services/nodes';
import Modal from '../common/Modal';
import { PlayIcon, ArrowPathIcon } from '@heroicons/react/24/outline';

const NodeTester = ({ node, onClose }) => {
  const [inputData, setInputData] = useState('{}');
  const [testResults, setTestResults] = useState(null);
  const [loading, setLoading] = useState(false);
  const [inputError, setInputError] = useState(null);

  // Test node configuration with provided input
  const handleTestNode = async () => {
    // Validate JSON input
    try {
      JSON.parse(inputData);
      setInputError(null);
    } catch (error) {
      setInputError('Invalid JSON format');
      return;
    }

    try {
      setLoading(true);
      const parsedInput = JSON.parse(inputData);
      
      const response = await nodeService.testNodeConfig(
        node.data.nodeType,
        node.data.config || {},
        parsedInput
      );
      
      setTestResults(response.data);
      toast.success('Node test completed successfully');
    } catch (error) {
      console.error('Error testing node:', error);
      toast.error('Failed to test node configuration');
      
      // If we have error details from the API
      if (error.response?.data?.error) {
        setTestResults({
          success: false,
          error: error.response.data.error,
          output: null
        });
      } else {
        setTestResults({
          success: false,
          error: error.message || 'An unknown error occurred',
          output: null
        });
      }
    } finally {
      setLoading(false);
    }
  };

  // Format JSON for display
  const formatJSON = (json) => {
    try {
      if (typeof json === 'string') {
        return JSON.stringify(JSON.parse(json), null, 2);
      }
      return JSON.stringify(json, null, 2);
    } catch (error) {
      return json;
    }
  };

  return (
    <div className="bg-white shadow-xl rounded-lg overflow-hidden max-w-4xl w-full">
      <div className="px-4 py-5 sm:px-6 border-b border-gray-200">
        <h3 className="text-lg leading-6 font-medium text-gray-900">
          Test Node: {node.data.label}
        </h3>
        <p className="mt-1 text-sm text-gray-500">
          Test this node with sample input data
        </p>
      </div>
      
      <div className="px-4 py-5 sm:p-6">
        <div className="space-y-6">
          {/* Input section */}
          <div>
            <label htmlFor="input-data" className="block text-sm font-medium text-gray-700">
              Input Data (JSON)
            </label>
            <div className="mt-1">
              <textarea
                id="input-data"
                name="input-data"
                rows={5}
                className={`shadow-sm block w-full focus:ring-primary-500 focus:border-primary-500 sm:text-sm border-gray-300 rounded-md font-mono ${
                  inputError ? 'border-red-300' : ''
                }`}
                value={inputData}
                onChange={(e) => setInputData(e.target.value)}
                placeholder='{"key": "value"}'
              />
              {inputError && (
                <p className="mt-1 text-sm text-red-600">{inputError}</p>
              )}
            </div>
            <p className="mt-2 text-sm text-gray-500">
              Enter sample input data in JSON format to test this node
            </p>
          </div>
          
          {/* Test button */}
          <div>
            <button
              type="button"
              onClick={handleTestNode}
              disabled={loading}
              className="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md shadow-sm text-white bg-primary-600 hover:bg-primary-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500 disabled:opacity-50"
            >
              {loading ? (
                <>
                  <ArrowPathIcon className="h-5 w-5 mr-2 animate-spin" />
                  Testing...
                </>
              ) : (
                <>
                  <PlayIcon className="h-5 w-5 mr-2" />
                  Run Test
                </>
              )}
            </button>
          </div>
          
          {/* Results section */}
          {testResults && (
            <div className="border rounded-md overflow-hidden">
              <div className="bg-gray-50 px-4 py-3 border-b border-gray-200">
                <h4 className="text-sm font-medium text-gray-900">Test Results</h4>
              </div>
              <div className="px-4 py-3">
                <div className="space-y-4">
                  {/* Status */}
                  <div>
                    <div className="text-sm font-medium text-gray-700">Status:</div>
                    <div className={`mt-1 text-sm ${testResults.success ? 'text-green-600' : 'text-red-600'}`}>
                      {testResults.success ? 'Success' : 'Error'}
                    </div>
                  </div>
                  
                  {/* Error (if any) */}
                  {testResults.error && (
                    <div>
                      <div className="text-sm font-medium text-gray-700">Error:</div>
                      <div className="mt-1 bg-red-50 text-red-700 p-3 rounded text-sm font-mono overflow-auto">
                        {testResults.error}
                      </div>
                    </div>
                  )}
                  
                  {/* Output */}
                  {testResults.output !== null && (
                    <div>
                      <div className="text-sm font-medium text-gray-700">Output:</div>
                      <div className="mt-1 bg-gray-50 p-3 rounded text-sm font-mono overflow-auto">
                        <pre>{formatJSON(testResults.output)}</pre>
                      </div>
                    </div>
                  )}
                  
                  {/* Execution time */}
                  {testResults.execution_time && (
                    <div>
                      <div className="text-sm font-medium text-gray-700">Execution Time:</div>
                      <div className="mt-1 text-sm text-gray-600">
                        {testResults.execution_time} ms
                      </div>
                    </div>
                  )}
                </div>
              </div>
            </div>
          )}
        </div>
      </div>
      
      <div className="px-4 py-3 bg-gray-50 text-right sm:px-6">
        <button
          type="button"
          onClick={onClose}
          className="inline-flex justify-center py-2 px-4 border border-transparent shadow-sm text-sm font-medium rounded-md text-white bg-primary-600 hover:bg-primary-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500"
        >
          Close
        </button>
      </div>
    </div>
  );
};

export default NodeTester;