CREATE TABLE IF NOT EXISTS lists (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(255) NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    modified_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS list_users (
    list_id UUID REFERENCES lists(id) ON DELETE CASCADE,
    user_id UUID NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    PRIMARY KEY (list_id, user_id)
);

CREATE INDEX idx_list_users_user_id ON list_users(user_id);

CREATE TABLE IF NOT EXISTS list_items (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    list_id UUID REFERENCES lists(id) ON DELETE CASCADE,
    title VARCHAR(255) NOT NULL,
    is_completed BOOLEAN NOT NULL DEFAULT FALSE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    modified_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_list_items_list_id ON list_items(list_id);