import colors from 'ansi-colors';
import { sync } from 'cross-spawn';

type Output = {
  /**
   * The absolute path to the output folder.
   */
  path: string;
  /**
   * Post-processing commands to run on the output folder, executed in order.
   */
  postProcess: ReadonlyArray<string | UserPostProcessor>;
};

export type UserPostProcessor = {
  /**
   * Arguments to pass to the command. Use `{{path}}` as a placeholder
   * for the output directory path.
   *
   * @example ['format', '--write', '{{path}}']
   */
  args: ReadonlyArray<string>;
  /**
   * The command to run (e.g., 'biome', 'prettier', 'eslint').
   */
  command: string;
  /**
   * Display name for logging. Defaults to the command name.
   */
  name?: string;
};

export type PostProcessor = {
  /**
   * Arguments to pass to the command.
   */
  args: ReadonlyArray<string>;
  /**
   * The command to run.
   */
  command: string;
  /**
   * Display name for logging.
   */
  name: string;
};

export function postprocessOutput(
  config: Output,
  postProcessors: Record<string, PostProcessor>,
  jobPrefix: string,
): void {
  for (const processor of config.postProcess) {
    const resolved = typeof processor === 'string' ? postProcessors[processor] : processor;

    // TODO: show warning
    if (!resolved) continue;

    const name = resolved.name ?? resolved.command;
    const args = resolved.args.map((arg) => arg.replace('{{path}}', config.path));

    console.log(`${jobPrefix}🧹 Running ${colors.cyanBright(name)}`);
    sync(resolved.command, args);
  }
}