#!/usr/bin/env bun
/**
 * Generates MISSING.yml — same structure as FOLDERS.yml but only listing
 * packages whose directories do not yet exist on disk.
 * Run: bun scripts/generate-missing.ts
 */

import { existsSync, writeFileSync } from "node:fs";
import { join, resolve } from "node:path";
import { parse as parseYaml, stringify as stringifyYaml } from "yaml";

const ROOT = resolve(import.meta.dir, "..");
const foldersPath = join(ROOT, "FOLDERS.yml");

type FoldersYml = Record<string, Record<string, string[]>>;

const folders = parseYaml(await Bun.file(foldersPath).text()) as FoldersYml;

const missing: FoldersYml = {};

let totalPackages = 0;
let completedCount = 0;
let missingCount = 0;

for (const [top, domains] of Object.entries(folders)) {
    for (const [domain, pkgs] of Object.entries(domains)) {
        const missingPkgs: string[] = [];

        for (const name of pkgs) {
            totalPackages++;
            const pkgDir = join(ROOT, top, domain, name);
            if (existsSync(pkgDir)) {
                completedCount++;
            } else {
                missingPkgs.push(name);
                missingCount++;
            }
        }

        if (missingPkgs.length > 0) {
            if (!missing[top]) missing[top] = {};
            missing[top][domain] = missingPkgs;
        }
    }
}

const header = [
    "# MISSING — packages not yet created on disk.",
    "# Auto-generated by scripts/generate-missing.ts — do not edit manually.",
    "# Re-run after landing a new package to refresh.",
    "",
].join("\n");

const yaml = stringifyYaml(missing, {
    lineWidth: 100,
    defaultKeyType: "PLAIN",
    defaultStringType: "PLAIN",
});

const outPath = join(ROOT, "MISSING.yml");
writeFileSync(outPath, header + yaml, "utf8");

console.log(`Wrote ${outPath}`);
console.log(`  ${totalPackages} total packages`);
console.log(`  ${completedCount} completed`);
console.log(`  ${missingCount} missing`);