CREATE TABLE IF NOT EXISTS sessions (
    id           TEXT    PRIMARY KEY NOT NULL,
    user_id      TEXT    NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    token_hash   TEXT    NOT NULL UNIQUE,
    ip_address   TEXT,
    user_agent   TEXT,
    created_at   TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
    expires_at   TEXT    NOT NULL,
    last_seen_at TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
    revoked      INTEGER NOT NULL DEFAULT 0
);

CREATE INDEX IF NOT EXISTS idx_sessions_user_id    ON sessions(user_id);
CREATE INDEX IF NOT EXISTS idx_sessions_token_hash ON sessions(token_hash);
CREATE INDEX IF NOT EXISTS idx_sessions_expires_at ON sessions(expires_at);