/**
 * One-off helper: merge research-based curriculumCoverage into math-curriculum.json.
 * Run: bun scripts/apply-math-coverage.ts
 */
import { readFileSync, writeFileSync } from "node:fs";
import path from "node:path";

type Role = "core" | "extension" | "related";
type Coverage = Partial<Record<string, Role>>;

const ROOT = path.join(import.meta.dir, "..");
const JSON_PATH = path.join(ROOT, "data/math-curriculum.json");

/** slug → framework label → role */
const COVERAGE_BY_SLUG: Record<string, Coverage> = {
  "zero-and-one": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    DSE: "related",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    Gaokao: "related",
  },
  "counting-and-numbers": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    DSE: "related",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    Gaokao: "related",
  },
  "basic-math-notation": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    DSE: "related",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    Gaokao: "related",
  },
  "properties-of-operations": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    DSE: "related",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    Gaokao: "related",
  },
  "written-calculation": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    DSE: "related",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    Gaokao: "related",
  },
  "integer-foundations": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    DSE: "related",
    Gaokao: "related",
  },
  "integer-arithmetic": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    DSE: "related",
    Gaokao: "related",
  },
  "rational-number-operations": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    DSE: "related",
    Gaokao: "related",
  },
  "percentage-applications": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    DSE: "related",
    Gaokao: "related",
  },
  "ratios-and-rates-foundation": {
    Foundation: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    DSE: "related",
    Gaokao: "related",
  },
  "directed-numbers-rates": {
    DSE: "core",
    IGCSE: "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    Foundation: "related",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    Gaokao: "related",
  },
  "polynomials-expansion-factorisation": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "A-Level": "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    Gaokao: "core",
    Foundation: "related",
    AP: "related",
  },
  "algebraic-fractions-formulas": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "A-Level": "core",
    "Common Core": "related",
    Singapore: "related",
    "UK GCSE": "core",
    Gaokao: "related",
    Foundation: "related",
    AP: "related",
  },
  "linear-equations-two-unknowns": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "A-Level": "core",
    "Common Core": "core",
    Singapore: "core",
    "UK GCSE": "core",
    Gaokao: "core",
    AP: "related",
    Foundation: "related",
  },
  "linear-inequalities-one-unknown": {
    DSE: "core",
    IGCSE: "core",
    "Common Core": "core",
    "UK GCSE": "core",
    IB: "related",
    "A-Level": "related",
    AP: "related",
    Singapore: "related",
    Gaokao: "related",
  },
  "laws-of-indices": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "A-Level": "core",
    AP: "core",
    "Common Core": "core",
    "UK GCSE": "core",
    Singapore: "core",
    Gaokao: "core",
    Foundation: "related",
  },
  "quadratic-equations": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "A-Level": "core",
    AP: "core",
    "Common Core": "core",
    "UK GCSE": "core",
    Singapore: "core",
    Gaokao: "core",
    Foundation: "related",
  },
  "factor-remainder-theorems": {
    DSE: "extension",
    IB: "extension",
    "A-Level": "extension",
    IGCSE: "related",
    Gaokao: "related",
    AP: "related",
  },
  "complex-numbers": {
    DSE: "extension",
    IB: "extension",
    "A-Level": "extension",
    Gaokao: "related",
    IGCSE: "related",
    AP: "related",
  },
  "functions-graphs": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "A-Level": "core",
    AP: "core",
    "Common Core": "core",
    "UK GCSE": "core",
    Singapore: "core",
    Gaokao: "core",
    Foundation: "related",
  },
  "exponential-logarithmic": {
    DSE: "extension",
    IGCSE: "core",
    IB: "core",
    "A-Level": "core",
    AP: "core",
    "Common Core": "core",
    "UK GCSE": "core",
    Gaokao: "core",
    Singapore: "related",
    Foundation: "related",
  },
  "sequences-series": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "A-Level": "core",
    "Common Core": "related",
    "UK GCSE": "core",
    AP: "related",
    Gaokao: "core",
    Singapore: "related",
    Foundation: "related",
  },
  "variations": {
    DSE: "core",
    IB: "related",
    "A-Level": "related",
    IGCSE: "related",
    "Common Core": "related",
    Singapore: "related",
  },
  "linear-programming": {
    DSE: "extension",
    IB: "extension",
    "A-Level": "related",
    AP: "related",
    IGCSE: "related",
  },
  "coordinate-geometry-foundations": {
    DSE: "core",
    IGCSE: "core",
    "Common Core": "core",
    "UK GCSE": "core",
    IB: "core",
    "A-Level": "related",
    Singapore: "core",
    AP: "related",
    Gaokao: "related",
  },
  "deductive-geometry": {
    DSE: "core",
    IGCSE: "core",
    "UK GCSE": "core",
    "Common Core": "core",
    Singapore: "core",
    IB: "related",
    "A-Level": "related",
    Gaokao: "related",
  },
  "congruence-similarity": {
    DSE: "core",
    IGCSE: "core",
    "UK GCSE": "core",
    "Common Core": "core",
    Singapore: "core",
    IB: "related",
    "A-Level": "related",
    Gaokao: "related",
  },
  "pythagoras-theorem": {
    DSE: "core",
    IGCSE: "core",
    "UK GCSE": "core",
    "Common Core": "core",
    Singapore: "core",
    IB: "core",
    "A-Level": "related",
    Gaokao: "core",
    AP: "related",
  },
  "introduction-trigonometry": {
    DSE: "core",
    IGCSE: "core",
    "UK GCSE": "core",
    "Common Core": "core",
    Singapore: "core",
    IB: "core",
    "A-Level": "related",
    Gaokao: "core",
    AP: "related",
  },
  "mensuration-3d": {
    DSE: "core",
    IGCSE: "core",
    "UK GCSE": "core",
    "Common Core": "core",
    Singapore: "core",
    IB: "related",
    "A-Level": "related",
    Gaokao: "related",
  },
  "coordinate-circles": {
    DSE: "core",
    IGCSE: "related",
    IB: "extension",
    "A-Level": "extension",
    Gaokao: "related",
    "UK GCSE": "related",
    AP: "related",
  },
  "advanced-trigonometry": {
    DSE: "extension",
    IGCSE: "core",
    IB: "core",
    "A-Level": "core",
    AP: "core",
    "UK GCSE": "core",
    Gaokao: "core",
    "Common Core": "related",
    Singapore: "related",
  },
  "circle-properties": {
    DSE: "extension",
    IGCSE: "core",
    "UK GCSE": "core",
    IB: "related",
    "A-Level": "related",
    Gaokao: "related",
    Singapore: "related",
  },
  "loci": {
    DSE: "extension",
    IGCSE: "related",
    "A-Level": "related",
    IB: "related",
    "UK GCSE": "related",
  },
  "statistical-charts-averages": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "Common Core": "core",
    "UK GCSE": "core",
    Singapore: "core",
    AP: "related",
    Gaokao: "related",
    "A-Level": "related",
  },
  "measures-dispersion": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "A-Level": "related",
    AP: "related",
    "Common Core": "core",
    "UK GCSE": "core",
    Singapore: "related",
    Gaokao: "related",
  },
  "basic-probability": {
    DSE: "core",
    IGCSE: "core",
    IB: "core",
    "Common Core": "core",
    "UK GCSE": "core",
    Singapore: "core",
    AP: "related",
    "A-Level": "related",
    Gaokao: "related",
  },
  "permutations-combinations-probability": {
    DSE: "extension",
    IGCSE: "extension",
    IB: "core",
    "A-Level": "core",
    AP: "related",
    Gaokao: "related",
    "Common Core": "related",
  },
  "normal-distribution-z-scores": {
    DSE: "extension",
    IB: "core",
    "A-Level": "core",
    AP: "related",
    IGCSE: "related",
    Gaokao: "related",
    "Common Core": "related",
  },
  "statistical-literacy": {
    DSE: "core",
    IB: "related",
    "Common Core": "related",
    IGCSE: "related",
    AP: "related",
    "A-Level": "related",
    Singapore: "related",
  },
};

type Chapter = {
  slug: string;
  curriculums?: string[];
  curriculumCoverage?: Coverage;
  [key: string]: unknown;
};

type Catalog = {
  strands: { chapters: Chapter[] }[];
  [key: string]: unknown;
};

const catalog = JSON.parse(readFileSync(JSON_PATH, "utf8")) as Catalog;

for (const strand of catalog.strands) {
  for (const chapter of strand.chapters) {
    const coverage = COVERAGE_BY_SLUG[chapter.slug];
    if (!coverage) {
      throw new Error(`Missing coverage map for slug: ${chapter.slug}`);
    }
    chapter.curriculumCoverage = coverage;
    delete chapter.curriculums;
  }
}

writeFileSync(JSON_PATH, `${JSON.stringify(catalog, null, 2)}\n`);
console.log(`Updated ${Object.keys(COVERAGE_BY_SLUG).length} chapters in math-curriculum.json`);