CREATE TABLE networker_worlds (
    id BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
    slug VARCHAR(150) NOT NULL UNIQUE,
    title VARCHAR(200) NOT NULL,
    description VARCHAR(1200),
    difficulty VARCHAR(30) NOT NULL DEFAULT 'junior',
    exam_scope VARCHAR(20) NOT NULL DEFAULT 'AP1',
    sort_order INT NOT NULL DEFAULT 0,
    active BOOLEAN NOT NULL DEFAULT TRUE,
    CONSTRAINT chk_networker_exam_scope CHECK (exam_scope IN ('AP1','AP2_FIAE','AP2_FISI','CROSS'))
);

CREATE TABLE networker_levels (
    id BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
    world_id BIGINT NOT NULL REFERENCES networker_worlds(id) ON DELETE CASCADE,
    title VARCHAR(200) NOT NULL,
    level_type VARCHAR(30) NOT NULL,
    points INT NOT NULL DEFAULT 100,
    sort_order INT NOT NULL DEFAULT 0,
    payload VARCHAR(8000) NOT NULL
);

CREATE INDEX idx_networker_levels_world ON networker_levels(world_id);