/**
 * export-catalog — build the signed catalog product from the live freeapi DB.
 *
 * This is the single source of truth pipeline: every model and its resolved
 * quirks come straight out of the same SQLite DB the router uses, so the
 * published catalog can never drift from what the gateway actually serves.
 * The output JSON is what the standalone catalog server (../../catalog) hands
 * to clients — fresh ("live") to Premium, a monthly snapshot to free users.
 *
 * Usage:
 *   tsx src/scripts/export-catalog.ts [--db <path>] [--out <path>]
 *                                     [--version <YYYY.MM.DD>] [--tier live|monthly]
 *                                     [--stdout]
 *
 * Defaults: reads the server's data/freeapi.db, writes the suite's
 * catalog/data/catalog.live.json. The catalog server signs it separately
 * (catalog/src/scripts/sign-catalog.ts) so the signature covers the exact
 * bytes served.
 */
import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';
import { initDb, getDb } from '../db/index.js';
import { getAllProviders } from '../providers/index.js';
import { resolveQuirksByModel, quirkKey, listQuirkDefinitions } from '../services/quirks.js';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const SUITE_ROOT = path.resolve(__dirname, '../../../..'); // freeapi/server/src/scripts -> suite root

function arg(name: string): string | undefined {
  const i = process.argv.indexOf(`--${name}`);
  return i !== -1 ? process.argv[i + 1] : undefined;
}
function flag(name: string): boolean {
  return process.argv.includes(`--${name}`);
}

function dateVersion(d = new Date()): string {
  const yyyy = d.getUTCFullYear();
  const mm = String(d.getUTCMonth() + 1).padStart(2, '0');
  const dd = String(d.getUTCDate()).padStart(2, '0');
  return `${yyyy}.${mm}.${dd}`;
}

interface ModelRow {
  platform: string;
  model_id: string;
  display_name: string;
  intelligence_rank: number;
  speed_rank: number;
  size_label: string;
  rpm_limit: number | null;
  rpd_limit: number | null;
  tpm_limit: number | null;
  tpd_limit: number | null;
  monthly_token_budget: string;
  context_window: number | null;
  enabled: number;
  supports_vision: number;
  supports_tools: number;
}

function main() {
  const dbPath = arg('db');
  const tier = (arg('tier') as 'live' | 'monthly' | undefined) ?? 'live';
  const version = arg('version') ?? dateVersion();

  // In --stdout mode stdout must carry ONLY the JSON document; incidental
  // logs (e.g. initDb's "Database initialized at ...") go to stderr instead.
  if (flag('stdout')) console.log = console.error;

  initDb(dbPath);
  const db = getDb();

  const models = db
    .prepare(
      `SELECT platform, model_id, display_name, intelligence_rank, speed_rank, size_label,
              rpm_limit, rpd_limit, tpm_limit, tpd_limit, monthly_token_budget, context_window,
              enabled, supports_vision, supports_tools
         FROM models
        ORDER BY intelligence_rank ASC, platform ASC, model_id ASC`,
    )
    .all() as ModelRow[];

  const quirksByModel = resolveQuirksByModel(db);
  const quirkDefs = listQuirkDefinitions(db);

  // Only platforms that actually have a registered provider AND a model in the
  // catalog — skip 'custom' (user-supplied endpoint, nothing to publish).
  const livePlatforms = new Set(models.map((m) => m.platform));
  const platforms = getAllProviders()
    .filter((p) => p.platform !== 'custom' && livePlatforms.has(p.platform))
    .map((p) => ({ id: p.platform, name: p.name }))
    .sort((a, b) => a.id.localeCompare(b.id));

  const catalogModels = models.map((m) => ({
    platform: m.platform,
    modelId: m.model_id,
    displayName: m.display_name,
    intelligenceRank: m.intelligence_rank,
    speedRank: m.speed_rank,
    sizeLabel: m.size_label,
    limits: {
      rpm: m.rpm_limit,
      rpd: m.rpd_limit,
      tpm: m.tpm_limit,
      tpd: m.tpd_limit,
    },
    monthlyTokenBudget: m.monthly_token_budget,
    contextWindow: m.context_window,
    enabled: m.enabled === 1,
    supportsVision: m.supports_vision === 1,
    supportsTools: m.supports_tools === 1,
    quirks: quirksByModel.get(quirkKey(m.platform, m.model_id)) ?? [],
  }));

  const catalog = {
    version,
    generatedAt: new Date().toISOString(),
    tier,
    counts: {
      platforms: platforms.length,
      models: catalogModels.length,
      enabledModels: catalogModels.filter((m) => m.enabled).length,
      quirks: quirkDefs.length,
    },
    platforms,
    models: catalogModels,
    quirks: quirkDefs,
  };

  const json = JSON.stringify(catalog, null, 2) + '\n';

  if (flag('stdout')) {
    process.stdout.write(json);
    return;
  }

  const outPath = arg('out') ?? path.join(SUITE_ROOT, 'catalog', 'data', `catalog.${tier}.json`);
  fs.mkdirSync(path.dirname(outPath), { recursive: true });
  fs.writeFileSync(outPath, json);
  console.log(
    `Wrote ${tier} catalog ${version}: ${catalog.counts.models} models ` +
      `(${catalog.counts.enabledModels} enabled), ${catalog.counts.platforms} platforms, ` +
      `${catalog.counts.quirks} quirks -> ${outPath}`,
  );
}

main();