import type { SourceMapSegment } from './sourcemap-segment';

export interface SourceMapV3 {
  file?: string | null;
  names: readonly string[];
  sourceRoot?: string;
  sources: readonly (string | null)[];
  sourcesContent?: readonly (string | null)[];
  version: 3;
}

export interface EncodedSourceMap extends SourceMapV3 {
  mappings: string;
}

export interface DecodedSourceMap extends SourceMapV3 {
  mappings: readonly SourceMapSegment[][];
}

export interface Pos {
  line: number;
  column: number;
}

export type Mapping =
  | {
      generated: Pos;
      source: undefined;
      original: undefined;
      name: undefined;
    }
  | {
      generated: Pos;
      source: string;
      original: Pos;
      name: string;
    }
  | {
      generated: Pos;
      source: string;
      original: Pos;
      name: undefined;
    };