import { build } from 'esbuild';
import { FunctionBundlingUserError } from '../../../../utils/error.js';
import { RUNTIME } from '../../../runtime.js';
import { MODULE_FORMAT } from '../../utils/module_format.js';
import { getBundlerTarget } from '../esbuild/bundler_target.js';
import { NODE_BUNDLER } from '../types.js';
export const transpileESMToCJS = async ({ config, name, path }) => {
    // The version of ECMAScript to use as the build target. This will determine
    // whether certain features are transpiled down or left untransformed.
    const nodeTarget = getBundlerTarget(config.nodeVersion);
    try {
        const transpiled = await build({
            bundle: false,
            entryPoints: [path],
            format: MODULE_FORMAT.COMMONJS,
            logLevel: 'error',
            platform: 'node',
            sourcemap: Boolean(config.nodeSourcemap),
            target: [nodeTarget],
            write: false,
        });
        return transpiled.outputFiles[0].text;
    }
    catch (error) {
        throw FunctionBundlingUserError.addCustomErrorInfo(error, {
            functionName: name,
            runtime: RUNTIME.JAVASCRIPT,
            bundler: NODE_BUNDLER.NFT,
        });
    }
};