PRAGMA foreign_keys=1;
CREATE TABLE snippets (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    title TEXT, 
    content TEXT,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    expires_at DATETIME NOT NULL
);

-- Add an index on the created column.
CREATE INDEX idx_snippets_created ON snippets(created_at);

-- Add a trigger to keep timestamp updated.
CREATE TRIGGER snippet_update_timestamp
AFTER UPDATE ON snippets
FOR EACH ROW
BEGIN
    UPDATE snippets SET updated_at = CURRENT_TIMESTAMP WHERE id = OLD.id;
END;