import { stableStringify } from "@add-ideas/toolbox-helpers";

export interface CorpusFile {
  path: string;
  mediaType: string;
  purpose: string;
  content: string;
}

export const FORMAT_LAB_CORPUS: readonly CorpusFile[] = [
  {
    path: "structured/typed.json",
    mediaType: "application/json",
    purpose: "Scalar types, null, nesting, Unicode and formula-like text.",
    content:
      '[{"id":9007199254740991,"active":true,"missing":null,"nested":{"score":1.25},"text":"Café 🚲","formula":"=2+2"}]\n',
  },
  {
    path: "structured/text-cells.csv",
    mediaType: "text/csv",
    purpose:
      "Leading zeros, empty cells, literal null and spreadsheet formula risk.",
    content: 'id,empty,literal,formula\r\n001,,null,"=2+2"\r\n',
  },
  {
    path: "structured/records.ndjson",
    mediaType: "application/x-ndjson",
    purpose: "Record framing and non-ASCII text.",
    content: '{"id":1,"text":"naïve"}\n{"id":2,"text":"東京"}\n',
  },
  {
    path: "structured/typed.xml",
    mediaType: "application/xml",
    purpose: "Typed lab XML dialect and escaped characters.",
    content:
      '<?xml version="1.0" encoding="UTF-8"?>\n<records><row><field name="id" type="number">1</field><field name="text" type="string">A &amp; B</field></row></records>\n',
  },
];

export function corpusManifest(): string {
  return `${stableStringify(
    {
      schema: "https://git.add-ideas.de/lotobo/format-lab/schema/corpus-v1",
      corpusVersion: 1,
      generator: "de.add-ideas.format-lab",
      deterministic: true,
      files: FORMAT_LAB_CORPUS.map((file) => ({
        path: file.path,
        mediaType: file.mediaType,
        purpose: file.purpose,
        utf8Bytes: new TextEncoder().encode(file.content).length,
      })),
    },
    2,
  )}\n`;
}

export function exportCorpusFiles(): CorpusFile[] {
  return [
    ...FORMAT_LAB_CORPUS.map((file) => ({ ...file })),
    {
      path: "corpus-manifest.json",
      mediaType: "application/json",
      purpose: "Machine-readable deterministic corpus inventory.",
      content: corpusManifest(),
    },
  ];
}