import { migrate } from "drizzle-orm/mysql2/migrator";
import { drizzle } from "drizzle-orm/mysql2";
import { eq } from "drizzle-orm";
import { createPool } from "mysql2/promise";
import bcrypt from "bcryptjs";
import { users } from "../drizzle/schema";

const INITIAL_ADMIN_LOGIN = "adminItinova";
const INITIAL_ADMIN_PASSWORD = process.env.INITIAL_ADMIN_PASSWORD ?? "Itinova69!";

async function ensureInitialAdmin(pool: ReturnType<typeof createPool>) {
  const database = drizzle(pool);
  const existingAdmin = await database
    .select({ id: users.id })
    .from(users)
    .where(eq(users.login, INITIAL_ADMIN_LOGIN))
    .limit(1);

  if (existingAdmin.length > 0) return;

  const passwordHash = await bcrypt.hash(INITIAL_ADMIN_PASSWORD, 12);
  await database.insert(users).values({
    login: INITIAL_ADMIN_LOGIN,
    email: "adminItinova@santinova-soft.org",
    firstName: "Admin",
    lastName: "Itinova",
    passwordHash,
    role: "admin",
    isActive: true,
  });
  console.log("[Database] Compte administrateur initial créé.");
}

/**
 * Synchronise la base avec les migrations versionnées avant d'exposer l'API.
 * Une base sans DATABASE_URL reste utilisable en développement statique, mais
 * un déploiement connecté échoue explicitement si la migration ne peut aboutir.
 */
export async function runDatabaseMigrations() {
  const databaseUrl = process.env.DATABASE_URL;
  if (!databaseUrl) {
    console.warn("[Database] DATABASE_URL absent : migrations ignorées.");
    return;
  }

  const pool = createPool(databaseUrl);
  try {
    const database = drizzle(pool);
    await migrate(database, { migrationsFolder: "./drizzle" });
    await ensureInitialAdmin(pool);
    console.log("[Database] Migrations Drizzle synchronisées.");
  } finally {
    await pool.end();
  }
}