import { PgProtoParser, PgProtoParserOptions, getOptionsWithDefaults } from 'pg-proto-parser';
import { writeFileSync } from 'fs';
import { join } from 'path';
import chalk from 'chalk';
import { showHelp } from '../utils/help';

export async function runtimeSchemaCommand(argv: any) {
  if (argv.help) {
    showHelp('runtime-schema');
    process.exit(0);
  }

  if (!argv.inFile || !argv.outDir) {
    console.error(chalk.red('Error: --inFile and --outDir are required'));
    showHelp('runtime-schema');
    process.exit(1);
  }

  const format = argv.format || 'json';
  const filename = argv.filename || 'runtime-schema';

  try {
    console.log(chalk.blue('Parsing protobuf file...'));
    
    const options: PgProtoParserOptions = getOptionsWithDefaults({
      outDir: argv.outDir
    });

    const parser = new PgProtoParser(argv.inFile, options);
    
    // Generate runtime schema
    console.log(chalk.blue(`Generating runtime schema in ${format} format...`));
    console.log(chalk.yellow('Warning: Runtime schema generation is not yet fully implemented'));
    
    // Generate placeholder schema based on format
    let content: string;
    let fileExt: string;
    
    if (format === 'typescript') {
      // Generate TypeScript runtime schema placeholder
      content = `// Runtime schema for PostgreSQL AST nodes
// Generated from: ${argv.inFile}

export interface RuntimeSchema {
  // TODO: Implement runtime schema generation
  nodes: Record<string, any>;
}

export const runtimeSchema: RuntimeSchema = {
  nodes: {}
};
`;
      fileExt = '.ts';
    } else {
      // Generate JSON runtime schema placeholder
      content = JSON.stringify({
        generated: new Date().toISOString(),
        source: argv.inFile,
        nodes: {}
      }, null, 2);
      fileExt = '.json';
    }
    
    // Write file
    const outputPath = join(argv.outDir, `${filename}${fileExt}`);
    writeFileSync(outputPath, content);
    
    console.log(chalk.green(`✓ Runtime schema generated: ${outputPath}`));
  } catch (error: any) {
    console.error(chalk.red('Runtime schema error:'), error.message || error);
    process.exit(1);
  }
}