-- migrate:up

-- A bike is either available for reservation, or withdrawn from the fleet
-- (maintenance, damage, ...). The set of states is fixed by the app, so an enum
-- type is the right fit here.
CREATE TYPE bike_status AS ENUM ('in_service', 'out_of_service');

CREATE TABLE bikes (
    id SERIAL PRIMARY KEY,
    "name" TEXT NOT NULL,
    -- Identifier written on the keys, and how many of them exist for this bike
    key_number TEXT,
    key_quantity INTEGER NOT NULL DEFAULT 0,
    drivetrain TEXT,
    battery TEXT,
    status bike_status NOT NULL DEFAULT 'in_service',
    CONSTRAINT bikes_key_quantity_positive CHECK (key_quantity >= 0)
);

-- migrate:down
DROP TABLE IF EXISTS bikes;
DROP TYPE IF EXISTS bike_status;