// HQ creates these snapshots from delivered sightings and sends each command
// through the original group's physical radio downlink before execution.
class ERR_ConvoyCombatOrder
{
 int CommandId;
 int ReportId;
 int VehicleIndex;
 string SourceId;
 SCR_AIGroup Group;
 bool Hold;
 float ObservedAt = -1;
 float IssuedAt = -1;
 float ExpiresAt = -1;
}

class ERR_ConvoyCombatState
{
 bool Held;
 int LastCommandId;
 int ReportId;
 float ObservedAt = -1;
}

class ERR_ConvoyCombatRules
{
 static bool Accept(ERR_ConvoyCombatState state, ERR_ConvoyCombatOrder order, float now)
 {
  if (!state || !order || order.CommandId <= state.LastCommandId || order.CommandId <= 0 || order.ReportId <= 0) return false;
  if (!ERR_ForceRules.Finite(now) || !ERR_ForceRules.Finite(order.ObservedAt) || !ERR_ForceRules.Finite(order.IssuedAt) || !ERR_ForceRules.Finite(order.ExpiresAt)) return false;
  if (order.ObservedAt < 0 || order.IssuedAt < order.ObservedAt || now < order.IssuedAt || now >= order.ExpiresAt || order.ExpiresAt <= order.IssuedAt || order.ExpiresAt - order.IssuedAt > 30000) return false;
  if (order.Hold)
  {
   if (now - order.ObservedAt > 60000 || order.ObservedAt < state.ObservedAt) return false;
   if (state.ReportId == order.ReportId && state.ObservedAt != order.ObservedAt) return false;
   if (order.ReportId < state.ReportId) return false;
   return true;
  }
  return state.Held && order.ReportId == state.ReportId && order.ObservedAt == state.ObservedAt && order.IssuedAt - state.ObservedAt >= 60000;
 }
}