import postgres from "postgres";

const sql = postgres(process.env.DATABASE_URL ?? "postgres://pingql:pingql@localhost:5432/pingql", {
  max: 10,
  idle_timeout: 30,
  connect_timeout: 10,
});

export default sql;

export async function migrate() {
  // Plan expiry on accounts (may already exist from API/web migrations)
  await sql`ALTER TABLE accounts ADD COLUMN IF NOT EXISTS plan_expires_at TIMESTAMPTZ`;

  await sql`
    CREATE TABLE IF NOT EXISTS payments (
      id                BIGSERIAL PRIMARY KEY,
      account_id        UUID NOT NULL REFERENCES accounts(id) ON DELETE CASCADE,
      plan              TEXT NOT NULL,
      months            INTEGER,
      amount_usd        NUMERIC(10,2) NOT NULL,
      coin              TEXT NOT NULL,
      amount_crypto     TEXT NOT NULL,
      address           TEXT NOT NULL,
      derivation_index  INTEGER NOT NULL UNIQUE,
      status            TEXT NOT NULL DEFAULT 'pending',
      created_at        TIMESTAMPTZ DEFAULT now(),
      paid_at           TIMESTAMPTZ,
      expires_at        TIMESTAMPTZ NOT NULL,
      txid              TEXT
    )
  `;

  await sql`ALTER TABLE payments ADD COLUMN IF NOT EXISTS amount_received TEXT NOT NULL DEFAULT '0'`;

  await sql`
    CREATE TABLE IF NOT EXISTS payment_txs (
      id            BIGSERIAL PRIMARY KEY,
      payment_id    BIGINT NOT NULL REFERENCES payments(id) ON DELETE CASCADE,
      txid          TEXT NOT NULL,
      amount        TEXT NOT NULL,
      confirmed     BOOLEAN NOT NULL DEFAULT false,
      detected_at   TIMESTAMPTZ DEFAULT now(),
      UNIQUE(payment_id, txid)
    )
  `;

  await sql`CREATE INDEX IF NOT EXISTS idx_payment_txs_payment ON payment_txs(payment_id)`;
  await sql`CREATE INDEX IF NOT EXISTS idx_payment_txs_txid ON payment_txs(txid)`;
  await sql`CREATE INDEX IF NOT EXISTS idx_payments_status ON payments(status)`;
  await sql`CREATE INDEX IF NOT EXISTS idx_payments_account ON payments(account_id)`;

  console.log("Pay DB ready");
}