-- Add type to recurring_expenses (income | expense, default expense — retrocompatível)
ALTER TABLE recurring_expenses
    ADD COLUMN IF NOT EXISTS type VARCHAR(10) NOT NULL DEFAULT 'expense'
        CHECK (type IN ('income', 'expense'));

-- Track income recurrings marked as "late" for a given month
CREATE TABLE IF NOT EXISTS recurring_late (
    id           SERIAL PRIMARY KEY,
    recurring_id INTEGER NOT NULL REFERENCES recurring_expenses(id) ON DELETE CASCADE,
    month        VARCHAR(7) NOT NULL,
    created_at   TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
    UNIQUE(recurring_id, month)
);