CREATE EXTENSION IF NOT EXISTS pgcrypto;

CREATE TABLE IF NOT EXISTS users (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  first_name TEXT NOT NULL,
  last_name TEXT NOT NULL,
  username TEXT NOT NULL UNIQUE,
  password_hash TEXT NOT NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  last_login_at TIMESTAMPTZ
);

CREATE TABLE IF NOT EXISTS incomes (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  description TEXT NOT NULL,
  amount NUMERIC(12,2) NOT NULL CHECK (amount >= 0),
  category TEXT NOT NULL,
  date DATE NOT NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_incomes_user_id_date ON incomes(user_id, date DESC);

CREATE TABLE IF NOT EXISTS expenses (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  description TEXT NOT NULL,
  amount NUMERIC(12,2) NOT NULL CHECK (amount >= 0),
  category TEXT NOT NULL,
  date DATE NOT NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_expenses_user_id_date ON expenses(user_id, date DESC);