#!/usr/bin/env node
// DESTRUCTIVE training/demo reset of the SQLite DB at DATABASE_URL. Deletes rows from
// whole CATEGORIES of tables so a site can be re-used to TRAIN operators/admins without
// leaving demo data behind. This is intentionally a CLI script (no UI button) so it
// cannot be triggered casually — and it is double-gated so it never runs on a real booth.
//
//   ⚠ This TRUNCATES the append-only, hash-chained, SIGNED ledger (`ledger_events`).
//     That is the anti-fraud record. A partial delete would break the chain, so a
//     financial reset wipes the whole ledger back to empty (re-seeding starts a NEW
//     chain under the same EVENT_SIGNING_KEY — the key is NOT touched here). Only ever
//     do this on a TRAINING/DEMO box. See wiki/concepts/append-only-event-chain.md.
//
// Flags (combinable; at least one required):
//   --all         every category below (a blank-slate box)
//   --financial   transactional history: ledger (entry/exit/payment/void/shift/cash/
//                 anomaly), device telemetry, snapshots, subscription INSTANCES +
//                 their credentials/plates, blocklist. KEEPS users, devices, config,
//                 tariffs, subscription PLANS.
//   --config      site_config, devices, setup_state (re-runs first-run setup),
//                 tariffs + tariff_versions + tariff_drafts, subscription_plans.
//   --users       users, roles, role_permissions, auth sessions. (After this or --all,
//                 re-seed an admin: apps/server/scripts/seed-admin.mjs.)
//   --diagnostics app_logs (the unsigned diagnostic store behind the /setup/logs
//                 viewer). Separate from --financial: logs are evidence about the BOX,
//                 not the traffic — wipe them only when handing over a blank slate.
//
// DRIFT GUARD: before doing anything, the script compares the union of the categories
// above against the tables actually present in the DB and REFUSES if any table is
// uncategorized — so a new table can't silently survive resets (app_logs and
// tariff_drafts did exactly that until 2026-07-08).
//
// Safety gates (BOTH required):
//   1. env RESET_ALLOWED=1   — a real booth never sets this.
//   2. type the DB filename   — interactive confirmation (skip with --yes ONLY in CI).
//
// Usage:
//   RESET_ALLOWED=1 DATABASE_URL=apps/server/parking.sqlite \
//     node packages/db/scripts/reset-db.mjs --financial
import { createInterface } from "node:readline";
import { basename, resolve } from "node:path";
import { existsSync } from "node:fs";
import Database from "better-sqlite3";

// --- Category → tables (child tables BEFORE parents; we also disable FKs for the txn). ---
const CATEGORIES = {
  financial: [
    "ledger_events",
    "device_events",
    "snapshots",
    "subscription_plates",
    "subscription_credentials",
    "subscriptions",
    "blocklist",
    // Car Wash (venue module): orders are money history (settled against ledger events);
    // the review outbox is a delivery queue of crops + choices — both go with the ledger.
    "carwash_review_outbox",
    "carwash_orders",
  ],
  config: [
    "site_config",
    "devices",
    "setup_state",
    "tariff_drafts",
    "tariff_versions",
    "tariffs",
    "subscription_plans",
    // Merchant validation programs (bar/lavazh) + their user bindings (child first).
    // A --users reset without --config may orphan a binding row; harmless — a binding
    // whose user is gone grants nothing.
    "validation_program_users",
    "validation_programs",
    // Car Wash master data: prices reference categories + services (child first); the
    // module's site-level config (pay-at, vision threshold) is config like site_config.
    "carwash_prices",
    "carwash_categories",
    "carwash_services",
    "carwash_config",
  ],
  // role_jobs = which jobs a role follows (child of roles).
  users: ["sessions", "role_permissions", "role_jobs", "users", "roles"],
  diagnostics: ["app_logs"],
};

/** Every user table in the DB must belong to a category above (internal bookkeeping
 *  like sqlite_* and drizzle's __* migration table excepted). Dies listing offenders —
 *  the fix is a one-line addition to CATEGORIES, decided deliberately, not by omission. */
function assertNoUncategorizedTables(sqlite) {
  const known = new Set(Object.values(CATEGORIES).flat());
  const actual = sqlite
    .prepare(`SELECT name FROM sqlite_master WHERE type = 'table'`)
    .all()
    .map((r) => r.name)
    .filter((n) => !n.startsWith("sqlite_") && !n.startsWith("__"));
  const uncategorized = actual.filter((n) => !known.has(n));
  if (uncategorized.length > 0) {
    die(
      `schema drift — table(s) not covered by any reset category: ${uncategorized.join(", ")}\n` +
        `       add them to CATEGORIES in packages/db/scripts/reset-db.mjs (this guard exists so\n` +
        `       new tables can't silently survive resets).`,
    );
  }
}

function parseArgs(argv) {
  const flags = new Set(argv.filter((a) => a.startsWith("--")).map((a) => a.slice(2)));
  const wantAll = flags.has("all");
  const cats = wantAll ? Object.keys(CATEGORIES) : Object.keys(CATEGORIES).filter((c) => flags.has(c));
  return { cats, autoYes: flags.has("yes"), wantAll };
}

function die(msg) {
  console.error(`[reset] ${msg}`);
  process.exit(1);
}

async function confirm(promptText, expected) {
  const rl = createInterface({ input: process.stdin, output: process.stdout });
  const answer = await new Promise((res) => rl.question(promptText, res));
  rl.close();
  return answer.trim() === expected;
}

async function main() {
  const url = process.env.DATABASE_URL;
  if (!url) die("DATABASE_URL is required");
  const dbPath = resolve(url);
  if (!existsSync(dbPath)) die(`no database at ${dbPath}`);

  const { cats, autoYes, wantAll } = parseArgs(process.argv.slice(2));
  if (cats.length === 0) {
    die("nothing to do — pass --all, --financial, --config, --users, and/or --diagnostics");
  }

  // GATE 1: env opt-in. A production booth never sets this.
  if (process.env.RESET_ALLOWED !== "1") {
    die(
      `refusing to reset ${dbPath}\n` +
        `       set RESET_ALLOWED=1 to enable (real booths never set this).`,
    );
  }

  // Open early: the drift guard must run BEFORE anything is printed or confirmed, so
  // an uncategorized table aborts the whole run rather than surviving a "successful" reset.
  const sqlite = new Database(dbPath);
  assertNoUncategorizedTables(sqlite);

  // Resolve the ordered, de-duplicated table list for the chosen categories.
  const tables = [];
  for (const c of cats) for (const t of CATEGORIES[c]) if (!tables.includes(t)) tables.push(t);

  console.error(`\n⚠  DESTRUCTIVE RESET`);
  console.error(`   db        : ${dbPath}`);
  console.error(`   categories: ${cats.join(", ")}${wantAll ? "  (= everything)" : ""}`);
  console.error(`   tables    : ${tables.join(", ")}`);
  if (cats.includes("financial")) {
    console.error(`   NOTE: this TRUNCATES the signed append-only ledger. Training/demo only.`);
  }
  console.error("");

  // GATE 2: typed confirmation of the DB filename (skippable only with --yes, for CI).
  if (!autoYes) {
    const fname = basename(dbPath);
    const ok = await confirm(`Type the db filename to confirm (${fname}): `, fname);
    if (!ok) die("confirmation did not match — aborted, nothing changed.");
  }

  try {
    // FKs OFF for the wipe so we can delete in any order without ordering hazards;
    // a single transaction makes it all-or-nothing.
    sqlite.pragma("foreign_keys = OFF");
    const wipe = sqlite.transaction(() => {
      const counts = {};
      for (const t of tables) {
        const before = sqlite.prepare(`SELECT COUNT(*) AS n FROM "${t}"`).get().n;
        sqlite.prepare(`DELETE FROM "${t}"`).run();
        counts[t] = before;
      }
      return counts;
    });
    const counts = wipe();
    sqlite.pragma("foreign_keys = ON");
    // Reclaim space + reset the WAL so the file shrinks (demo boxes get re-used a lot).
    sqlite.exec("VACUUM");

    console.error(`[reset] done. Rows deleted:`);
    for (const t of tables) console.error(`         ${String(counts[t]).padStart(7)}  ${t}`);
    if (cats.includes("users") || wantAll) {
      console.error(
        `\n[reset] users were cleared — re-seed an admin:\n` +
          `        ADMIN_USER=admin ADMIN_PASS='…' node apps/server/scripts/seed-admin.mjs`,
      );
    }
  } finally {
    sqlite.close();
  }
}

main().catch((e) => die(e.message));