#!/usr/bin/env bun

/**
 * ensure-category-subcategory-intros — writes placeholder `_intro.md` files
 * for every category and subcategory that lacks one. Existing files are never
 * overwritten.
 *
 * Usage: bun scripts/ensure-category-subcategory-intros.ts
 */

import { existsSync, readdirSync, writeFileSync } from "node:fs";
import { join } from "node:path";
import { CONFIG } from "./lib/config.js";
import { isDirectorySafe } from "./lib/doc-tree.js";

const ROOT = CONFIG.paths.root;
const PACKAGES_ROOT = join(ROOT, CONFIG.paths.packagesRoot);

const CATEGORY_INTROS: Record<string, string> = {
    "api-stack":
        "# `api-stack`\n\nAPI infrastructure, plugin framework, and HTTP orchestration layer for the Suaveplan monorepo.",
    commerce:
        "# `commerce`\n\nBooking engines, contact management, payment plugins, and commerce primitives.",
    communication:
        "# `communication`\n\nEmail delivery, messaging channels, and webhook clients.",
    devtools:
        "# `devtools`\n\nDeveloper tooling, documentation generators, Docker helpers, and build utilities.",
    foundation:
        "# `foundation`\n\nFoundational primitives — types, errors, configuration, data structures, and cross-cutting utilities.",
    gaming: "# `gaming`\n\nGame engines, entity-component systems, and simulation libraries.",
    geospatial:
        "# `geospatial`\n\nGeospatial data, mapping, planetary coordinates, and logistics utilities.",
    identity:
        "# `identity`\n\nAuthentication, authorization, identity resolution, and credential management.",
    localization:
        "# `localization`\n\nInternationalization, localization, locale detection, and translation infrastructure.",
    media: "# `media`\n\nAudio, video, image, and font processing libraries.",
    money: "# `money`\n\nPayments, currencies, cryptocurrency, and financial primitives.",
    networking:
        "# `networking`\n\nDistributed networking, event buses, drive mesh, and network discovery.",
    observability:
        "# `observability`\n\nMonitoring, logging, health checks, audit trails, and analytics.",
    persistence:
        "# `persistence`\n\nCaching, database adapters, search engines, and storage abstractions.",
    "security-stack":
        "# `security-stack`\n\nCryptography, vaults, security utilities, and threat-detection primitives.",
    testkit:
        "# `testkit`\n\nTesting frameworks, A/B testing, and quality-assurance utilities.",
    threejs:
        "# `threejs`\n\nThree.js and React Three Fiber integrations.",
    ui: "# `ui`\n\nReact components, forms, and user-interface primitives.",
};

const SUBCATEGORY_INTROS: Record<string, string> = {
    api: "API orchestration, plugin lifecycle, routing, workers, and tenant resolution.",
    audio: "Audio processing, playback, analysis, and effect plugins.",
    "audio-fx": "Real-time audio effects and DSP plugins.",
    "audio-ir": "Impulse-response capture, loading, and room-acoustic plugins.",
    auth: "Authentication providers, JWT, WebAuthn, OAuth, and session resolution.",
    barcode: "1-D barcode generation and parsing.",
    bitpacker:
        "Bit-level binary packing, schemas, compression, and streaming codecs.",
    booking:
        "Universal booking engine with availability, conflict detection, and pricing.",
    cache: "Caching abstractions, memory caches, and Redis backends.",
    contacts:
        "Contact and group management with deduplication and import/export.",
    core: "Core foundation — types, errors, configuration, schema registry, and utilities.",
    crypto: "Cryptographic primitives, ciphers, hashes, curves, and key management.",
    data: "Data manipulation, masking, deduplication, diffing, and byte utilities.",
    database: "Database adapters, migrations, seeding, and SQLite support.",
    datetime: "Timezone-aware date/time utilities, calendars, and recurrence.",
    docker: "Docker helpers and GPU runtime configuration.",
    docs: "Documentation utilities, SVG compression, PDF handling, and sitemap generation.",
    drive: "Virtual filesystem, mesh networking, and chunk-addressed storage plugins.",
    emails:
        "Email delivery, DMARC parsing, templates, campaigns, and suppression lists.",
    env: "Type-safe environment variable loading and validation.",
    error: "Foundation error substrate, code registries, and wire formats.",
    etl: "Extract-Transform-Load pipeline engine with typed stages.",
    events: "Typed event bus, event sourcing, metrics, and transport bridges.",
    "feature-flags": "Feature-flag evaluation engine with percentage and attribute targeting.",
    finance:
        "Currency conversion, cryptocurrency utilities, and exchange-rate providers.",
    flow: "Finite state machines, CRDTs, idempotency, and CBOR serialization.",
    fonts: "Font packing, compression, subsetting, and conversion tools.",
    games: "Game controllers, entity-component systems, and game-server logic.",
    geo: "Geospatial coordinates, planetary data, and solar-system modelling.",
    i18n: "Internationalization core, backends, detectors, and locale resolution.",
    image: "Image compression, colour conversion, EXIF handling, and optimisation.",
    logistics: "Port data and logistics primitives.",
    messaging:
        "Messaging adapters — Discord, Slack, Telegram, SMS, iMessage, and notifications.",
    midi: "MIDI message parsing, control surfaces, and hardware integration.",
    migration: "Schema migration runners and ledger tracking.",
    monitor: "Logging, health checks, audit logging, and analytics instrumentation.",
    network:
        "Mesh networking, WebSocket transports, bootstrap, and discovery protocols.",
    payment:
        "Payment intent lifecycle, provider adapters, and fraud detection.",
    ports: "Maritime port and logistics data.",
    random: "Pseudo-random generators, noise functions, and deterministic sequences.",
    r3f: "React Three Fiber networking and scene components.",
    search: "Full-text search, BM25, fuzzy matching, and faceted search.",
    security: "Have-I-Been-Pwned checks, JWS, licensing, and OTP utilities.",
    storage: "Storage abstractions, browser backends, S3, CDN, and URI routing.",
    testing: "Testing runners, DOM helpers, E2E harnesses, and A/B testing.",
    timing: "Cron, stopwatches, throttling, debouncing, and scheduling.",
    tooling: "CLI frameworks, installers, and build tooling.",
    "webhook-client": "Webhook delivery client with retry logic and HMAC verification.",
    video: "Video encoding, decoding, and thumbnail generation.",
    voice: "Voice synthesis, speech-to-text, and provider adapters.",
    forms: "Form builders, validation, and React form components.",
    react: "React hooks and components for audio, auth, and UI surfaces.",
};

function ensureIntro(path: string, content: string): boolean {
    if (existsSync(path)) return false;
    writeFileSync(path, content + "\n");
    return true;
}

function main(): void {
    if (!isDirectorySafe(PACKAGES_ROOT)) {
        console.error(`Packages root not found: ${PACKAGES_ROOT}`);
        process.exit(2);
    }

    let created = 0;
    let skipped = 0;

    const catEntries = readdirSync(PACKAGES_ROOT, { withFileTypes: true });

    for (const cat of catEntries) {
        if (!cat.isDirectory() || cat.name.startsWith(".")) continue;
        const categoryDir = join(PACKAGES_ROOT, cat.name);

        // Category intro
        const catIntro = CATEGORY_INTROS[cat.name];
        if (catIntro) {
            const didCreate = ensureIntro(
                join(categoryDir, "_intro.md"),
                catIntro
            );
            didCreate ? created++ : skipped++;
        }

        const subEntries = readdirSync(categoryDir, { withFileTypes: true });
        for (const sub of subEntries) {
            if (!sub.isDirectory() || sub.name.startsWith(".")) continue;
            const subDir = join(categoryDir, sub.name);

            // Check if this subcategory actually contains packages
            const pkgEntries = readdirSync(subDir, { withFileTypes: true });
            const hasPackages = pkgEntries.some(
                (e) =>
                    e.isDirectory() &&
                    !e.name.startsWith(".") &&
                    existsSync(join(subDir, e.name, "package.json"))
            );
            if (!hasPackages) continue;

            const subIntro = SUBCATEGORY_INTROS[sub.name];
            if (subIntro) {
                const didCreate = ensureIntro(
                    join(subDir, "_intro.md"),
                    subIntro
                );
                didCreate ? created++ : skipped++;
            }
        }
    }

    console.log(`Created: ${created}`);
    console.log(`Skipped (already exist): ${skipped}`);
}

main();