CREATE TABLE validators (
  validator_id      TEXT PRIMARY KEY,
  hostname          TEXT NOT NULL DEFAULT '',
  os_port_id        TEXT NOT NULL DEFAULT '',
  state             TEXT NOT NULL DEFAULT 'unregistered',
  current_ip_id     INTEGER REFERENCES ip_queue(id),
  agent_version     TEXT NOT NULL DEFAULT '',
  last_heartbeat_at TIMESTAMP,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE ip_queue (
  id                 INTEGER PRIMARY KEY AUTOINCREMENT,
  ip_address         TEXT NOT NULL UNIQUE,
  sequence           INTEGER NOT NULL,
  state              TEXT NOT NULL DEFAULT 'queued',
  owner_validator_id TEXT REFERENCES validators(validator_id),
  fip_id             TEXT NOT NULL DEFAULT '',
  attempt_number     INTEGER NOT NULL DEFAULT 1,
  retry_count        INTEGER NOT NULL DEFAULT 0,
  lease_expires_at   TIMESTAMP,
  egress_complete    BOOLEAN NOT NULL DEFAULT 0,
  site1_complete     BOOLEAN NOT NULL DEFAULT 0,
  site2_complete     BOOLEAN NOT NULL DEFAULT 0,
  site3_complete     BOOLEAN NOT NULL DEFAULT 0,
  overall_result     TEXT NOT NULL DEFAULT '',
  assigned_at        TIMESTAMP,
  aggregated_at      TIMESTAMP,
  fip_released_at    TIMESTAMP,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX idx_ip_queue_state_seq ON ip_queue(state, sequence);

CREATE TABLE checks (
  id             INTEGER PRIMARY KEY AUTOINCREMENT,
  ip_id          INTEGER NOT NULL REFERENCES ip_queue(id),
  ip_address     TEXT NOT NULL,
  attempt_number INTEGER NOT NULL,
  validator_id   TEXT NOT NULL DEFAULT '',
  source         TEXT NOT NULL,
  check_type     TEXT NOT NULL,
  target         TEXT NOT NULL DEFAULT '',
  success        BOOLEAN NOT NULL,
  latency_ms     INTEGER NOT NULL DEFAULT 0,
  detail         TEXT NOT NULL DEFAULT '',
  checked_at     TIMESTAMP NOT NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  UNIQUE(ip_id, attempt_number, source, check_type, target)
);
CREATE INDEX idx_checks_ip_attempt ON checks(ip_id, attempt_number);

CREATE TABLE events (
  id            INTEGER PRIMARY KEY AUTOINCREMENT,
  source_type   TEXT NOT NULL,
  source_id     TEXT NOT NULL DEFAULT '',
  ip_id         INTEGER REFERENCES ip_queue(id),
  event_type    TEXT NOT NULL,
  payload       TEXT NOT NULL DEFAULT '',
  occurred_at   TIMESTAMP NOT NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX idx_events_ip ON events(ip_id);
CREATE INDEX idx_events_source ON events(source_type, source_id);