import path from "node:path";
import { pathToFileURL } from "node:url";
import { safeParseEkklesiaUserId } from "@ekklesia/contracts";
import {
  bootstrapPlatformOwner,
  createAuthorizationDrizzleDatabase,
  PlatformOwnerBootstrapError,
} from "../authorization/index.js";
import { resolveExecutableDatabaseTransport } from "./database-transport-environment.js";

class BootstrapCliError extends Error {
  constructor(message: string) {
    super(message);
    this.name = "BootstrapCliError";
  }
}

const usage =
  "Usage: pnpm authorization:bootstrap-owner -- --user-id <id> --confirm-user-id <same-id>";

interface ParsedArgs {
  readonly confirmUserId: string;
  readonly userId: string;
}

/** A minimal, hand-rolled flag parser — this command takes exactly two required, named flags, so
 * a general-purpose argument-parsing dependency is not warranted. */
function parseArgs(argv: readonly string[]): ParsedArgs {
  let userId: string | undefined;
  let confirmUserId: string | undefined;
  for (let index = 0; index < argv.length; index += 1) {
    const flag = argv[index];
    if (flag === "--user-id") {
      userId = argv[index + 1];
      index += 1;
    } else if (flag === "--confirm-user-id") {
      confirmUserId = argv[index + 1];
      index += 1;
    }
  }
  if (userId === undefined || confirmUserId === undefined) {
    throw new BootstrapCliError(usage);
  }
  return { confirmUserId, userId };
}

async function main(): Promise<void> {
  const { confirmUserId, userId: rawUserId } = parseArgs(process.argv.slice(2));

  // Deliberately not "infer the first user" or "select by signup order" — the operator must name
  // the exact, opaque Ekklesia user id twice, and both must match exactly, before anything else
  // is even attempted.
  if (rawUserId !== confirmUserId) {
    throw new BootstrapCliError(
      "--user-id and --confirm-user-id must match exactly. No changes were made.",
    );
  }

  const parsedUserId = safeParseEkklesiaUserId(rawUserId);
  if (!parsedUserId.success) {
    throw new BootstrapCliError("The provided user id is not a valid Ekklesia user id.");
  }

  // Read only when this command actually executes — never merely by importing this module (see
  // isDirectExecution() below) or any module it imports.
  const databaseUrl = process.env.DATABASE_URL;
  if (typeof databaseUrl !== "string" || databaseUrl.trim().length === 0) {
    throw new BootstrapCliError("DATABASE_URL is required.");
  }

  // Asserted before the connection is constructed, so an unsafe production transport never opens
  // a client at all.
  const transport = resolveExecutableDatabaseTransport(databaseUrl);
  const { close, db } = createAuthorizationDrizzleDatabase(databaseUrl, {
    connectionTimeoutMs: 10_000,
    operationTimeoutMs: 10_000,
    transport,
  });
  try {
    await bootstrapPlatformOwner(db, { userId: parsedUserId.data });
    console.log(`Platform-owner bootstrap complete for user "${parsedUserId.data}".`);
  } finally {
    await close().catch(() => undefined);
  }
}

function reportBootstrapCliError(error: unknown): void {
  if (error instanceof BootstrapCliError) {
    console.error(error.message);
    return;
  }
  if (error instanceof PlatformOwnerBootstrapError) {
    console.error(`[${error.code}] ${error.message}`);
    return;
  }
  console.error("Platform-owner bootstrap failed unexpectedly.");
}

function isDirectExecution(): boolean {
  const entrypoint = process.argv[1];
  return (
    entrypoint !== undefined && import.meta.url === pathToFileURL(path.resolve(entrypoint)).href
  );
}

if (isDirectExecution()) {
  main().catch((error: unknown) => {
    reportBootstrapCliError(error);
    process.exitCode = 1;
  });
}