CREATE TABLE IF NOT EXISTS audit_logs (
    id UUID PRIMARY KEY,
    user_id UUID,
    action TEXT NOT NULL,
    resource TEXT NOT NULL,
    resource_id UUID,
    ip_address TEXT,
    user_agent TEXT,
    metadata JSONB,
    timestamp TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_audit_logs_user_id ON audit_logs(user_id);
CREATE INDEX IF NOT EXISTS idx_audit_logs_action ON audit_logs(action);
CREATE INDEX IF NOT EXISTS idx_audit_logs_timestamp ON audit_logs(timestamp);
CREATE INDEX IF NOT EXISTS idx_audit_logs_ip_address ON audit_logs(ip_address);