CREATE TABLE IF NOT EXISTS todo_items (
    id         INTEGER PRIMARY KEY AUTOINCREMENT,
    list_id    INTEGER NOT NULL REFERENCES todo_lists (id) ON DELETE CASCADE,
    text       TEXT NOT NULL,
    complete   INTEGER NOT NULL DEFAULT 0 CHECK (complete IN (0, 1)),
    position   INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
    updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now'))
);

CREATE INDEX IF NOT EXISTS idx_todo_items_list_position ON todo_items (list_id, position);