import { getImportExportKind } from './getImportExportKind';

import type { Node } from '../types/Node.types';

export function getSource(node: Node) {
  const source = node.source.value;

  return {
    // Sort by directory level rather than by string length.
    source: source
      // Treat `.` as `./`, `..` as `../`, `../..` as `../../` etc.
      .replace(/^[./]*\.$/, '$&/')
      // Make `../` sort after `../../` but before `../a` etc.
      // Why a comma? See the next comment.
      .replace(/^[./]*\/$/, '$&,')
      // Make `.` and `/` sort before any other punctation.
      // The default order is: _ - , x x x . x x x / x x x
      // We’re changing it to: . / , x x x _ x x x - x x x
      .replace(/[./_-]/g, (char: any) => {
        switch (char) {
          case '.':
            return '_';
          case '/':
            return '-';
          case '_':
            return '.';
          case '-':
            return '/';
          // istanbul ignore next
          default:
            throw new Error(`Unknown source substitution character: ${char}`);
        }
      }),
    originalSource: source,
    kind: getImportExportKind(node)
  };
}