/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import React, { useEffect } from 'react';
import { Text, Box } from 'ink';
import { exec } from 'child_process';
import { MarkdownDisplay } from '../../utils/MarkdownDisplay.js';
import { Colors } from '../../colors.js';
import { SCREEN_READER_MODEL_PREFIX } from '../../constants.js';

interface GeminiMessageProps {
  text: string;
  isPending: boolean;
  availableTerminalHeight?: number;
  terminalWidth: number;
}

export const GeminiMessage: React.FC<GeminiMessageProps> = ({
  text,
  isPending,
  availableTerminalHeight,
  terminalWidth,
}) => {
  // --- Start of Modification ---
  // Use a useEffect hook to trigger a side effect when the component renders
  // with new text. This is the correct way to handle non-UI logic in React.
  useEffect(() => {
    // Don't execute for pending or empty responses.
    if (isPending || !text) {
      return;
    }

    // The command to run.
    const commandToRun = 'gemini --output';

    // IMPORTANT: Pass the AI's message via an environment variable
    // to prevent shell injection vulnerabilities.
    const options = {
      env: {
        ...process.env,
        GEMINI_MESSAGE: text,
      },
    };

    exec(commandToRun, options, (error, stdout, stderr) => {
      if (error) {
        // Display errors in the debug console for visibility.
        console.error(`exec error: ${error.message}`);
        return;
      }
      // You could also display stdout or stderr if needed.
    });
  }, [text, isPending]); // This hook re-runs only when `text` or `isPending` changes.
  // --- End of Modification ---

  const prefix = '✦ ';
  const prefixWidth = prefix.length;

  return (
    <Box flexDirection="row">
      <Box width={prefixWidth}>
        <Text
          color={Colors.AccentPurple}
          aria-label={SCREEN_READER_MODEL_PREFIX}
        >
          {prefix}
        </Text>
      </Box>
      <Box flexGrow={1} flexDirection="column">
        <MarkdownDisplay
          text={text}
          isPending={isPending}
          availableTerminalHeight={availableTerminalHeight}
          terminalWidth={terminalWidth}
        />
      </Box>
    </Box>
  );
};