import path from 'node:path';
import type { BuilderContext } from '../builders/types.js';

interface Rule {
  readonly directory: string;
  readonly extensions?: readonly string[];
}

export function shouldProcess(context: BuilderContext, rules: readonly Rule[]): boolean {
  const changed = context.changedFile;
  if (!changed) {
    return true;
  }

  const normalizedChanged = path.resolve(changed);

  for (const rule of rules) {
    const normalizedDir = path.resolve(rule.directory);
    if (!isPathInside(normalizedChanged, normalizedDir)) {
      continue;
    }

    if (!rule.extensions || rule.extensions.length === 0) {
      return true;
    }

    const extension = path.extname(normalizedChanged).toLowerCase();
    if (rule.extensions.includes(extension)) {
      return true;
    }
  }

  return false;
}

export function isPathInside(target: string, directory: string): boolean {
  const relative = path.relative(directory, target);
  return relative === '' || (!relative.startsWith('..') && !path.isAbsolute(relative));
}