ALTER TABLE services ADD COLUMN lb_weight INTEGER NOT NULL DEFAULT 1;
ALTER TABLE services ADD COLUMN lb_priority INTEGER NOT NULL DEFAULT 1;

ALTER TABLE service_groups ADD COLUMN lb_mode TEXT NOT NULL DEFAULT 'round_robin';
ALTER TABLE service_groups ADD COLUMN health_check_enabled INTEGER NOT NULL DEFAULT 0;
ALTER TABLE service_groups ADD COLUMN health_check_type TEXT NOT NULL DEFAULT 'tcp';
ALTER TABLE service_groups ADD COLUMN health_check_port INTEGER;
ALTER TABLE service_groups ADD COLUMN health_check_path TEXT;
ALTER TABLE service_groups ADD COLUMN health_check_expected_status INTEGER;
ALTER TABLE service_groups ADD COLUMN health_check_interval_sec INTEGER NOT NULL DEFAULT 30;
ALTER TABLE service_groups ADD COLUMN health_check_timeout_ms INTEGER NOT NULL DEFAULT 3000;

ALTER TABLE service_bindings ADD COLUMN lb_mode TEXT NOT NULL DEFAULT 'round_robin';
ALTER TABLE service_bindings ADD COLUMN health_check_enabled INTEGER NOT NULL DEFAULT 0;
ALTER TABLE service_bindings ADD COLUMN health_check_type TEXT NOT NULL DEFAULT 'tcp';
ALTER TABLE service_bindings ADD COLUMN health_check_port INTEGER;
ALTER TABLE service_bindings ADD COLUMN health_check_path TEXT;
ALTER TABLE service_bindings ADD COLUMN health_check_expected_status INTEGER;
ALTER TABLE service_bindings ADD COLUMN health_check_interval_sec INTEGER NOT NULL DEFAULT 30;
ALTER TABLE service_bindings ADD COLUMN health_check_timeout_ms INTEGER NOT NULL DEFAULT 3000;

ALTER TABLE service_binding_ips ADD COLUMN weight INTEGER NOT NULL DEFAULT 1;
ALTER TABLE service_binding_ips ADD COLUMN priority INTEGER NOT NULL DEFAULT 1;

CREATE TABLE ip_health_status (
    scope TEXT NOT NULL,
    ref_id INTEGER NOT NULL,
    ip TEXT NOT NULL,
    status TEXT NOT NULL DEFAULT 'unknown',
    latency_ms INTEGER,
    consecutive_failures INTEGER NOT NULL DEFAULT 0,
    last_checked_at TEXT,
    last_error TEXT,
    created_at TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at TEXT NOT NULL DEFAULT (datetime('now')),
    PRIMARY KEY (scope, ref_id, ip)
);

CREATE INDEX idx_ip_health_status_scope_ref ON ip_health_status(scope, ref_id);