-- Peer auto-discovery pending / rejected / approved records.

CREATE TABLE IF NOT EXISTS bgp_peer_discovery (
    id               TEXT PRIMARY KEY NOT NULL,
    tenant_id        TEXT NOT NULL REFERENCES tenant (id) ON DELETE CASCADE,
    speaker_id       TEXT REFERENCES bgp_speaker (id) ON DELETE SET NULL,
    neighbor_id      TEXT NOT NULL DEFAULT '',
    neighbor         TEXT NOT NULL,
    remote_asn       INTEGER NOT NULL DEFAULT 0,
    protocol_name    TEXT NOT NULL DEFAULT '',
    session_state    TEXT NOT NULL DEFAULT '',
    status           TEXT NOT NULL DEFAULT 'pending',
    first_seen_at    TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    last_seen_at     TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    approved_peer_id TEXT REFERENCES bgp_peer (id) ON DELETE SET NULL,
    created_at       TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    updated_at       TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    CHECK (status IN ('pending', 'approved', 'rejected'))
);

CREATE INDEX IF NOT EXISTS idx_bgp_peer_discovery_tenant_status
    ON bgp_peer_discovery (tenant_id, status);

CREATE UNIQUE INDEX IF NOT EXISTS idx_bgp_peer_discovery_tenant_neighbor_id
    ON bgp_peer_discovery (tenant_id, neighbor_id)
    WHERE neighbor_id != '';

CREATE UNIQUE INDEX IF NOT EXISTS idx_bgp_peer_discovery_tenant_neighbor_asn
    ON bgp_peer_discovery (tenant_id, neighbor, remote_asn)
    WHERE neighbor_id = '';