-- +goose Up
-- +goose StatementBegin

-- pg_role: Rolle dieser Node in der PG-Replikation.
-- "standalone" = kein Streaming-Replication-Setup
-- "primary"    = WAL-Sender, repliziert an Standby(s)
-- "standby"    = Hot-Standby, liest WAL vom Primary
ALTER TABLE ha_nodes ADD COLUMN IF NOT EXISTS pg_role TEXT NOT NULL DEFAULT 'standalone';

-- cluster_settings: VIP + VRRP-Konfiguration (Singleton, id=1).
-- vip_address   = die virtuelle IP-Adresse (z.B. "89.163.205.10")
-- vip_interface = Netzwerk-Interface (z.B. "eth0")
-- vip_auth_pass = VRRP-Authentication-Passwort (max. 8 Zeichen, Keepalived-Limit)
-- vrrp_router_id = VRRP Virtual Router ID (1–255, muss im Subnetz eindeutig sein)
CREATE TABLE IF NOT EXISTS cluster_settings (
    id              INTEGER PRIMARY KEY DEFAULT 1,
    vip_address     TEXT,
    vip_interface   TEXT,
    vip_auth_pass   TEXT,
    vrrp_router_id  INTEGER NOT NULL DEFAULT 51,
    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT cluster_settings_singleton CHECK (id = 1)
);

INSERT INTO cluster_settings (id) VALUES (1) ON CONFLICT DO NOTHING;

-- +goose StatementEnd

-- +goose Down
-- +goose StatementBegin

DROP TABLE IF EXISTS cluster_settings;
ALTER TABLE ha_nodes DROP COLUMN IF EXISTS pg_role;

-- +goose StatementEnd