public class MaintenanceRequestHelper {
    Public static List<Case> newCases = new list<case>();
    public static void updateWorkOrders(list<case> applicableTriggeredCases){
        map<id,case> applicableCases = new map<id,case>();
        for(case a:applicableTriggeredCases){
            if((a.type.equals('Repair') || a.type.equals('Routine Maintenance') ) && a.IsClosed)
                applicableCases.put(a.Id,a);
        }
        Map<Id, Integer> mapProduct = new Map<Id, Integer>();
        Map<Id, decimal> WorkPartMCycleMap = new Map<Id, decimal>();
        Map<Id, id> WorkPartEquipmentMap = new Map<Id, id>();
        Map<Id, decimal> EquipmentMCycldeMap = new Map<Id, decimal>();
        list<string>  EquipmentIdList = new list<string>();
        List<Work_Part__c> WorkParts = [select Id, Equipment__c,Maintenance_Request__c from Work_Part__c where Maintenance_Request__c in :applicableCases.keySet()];
        for(Work_Part__c WorkPart: WorkParts){
            if(!EquipmentIdList.contains(WorkPart.Equipment__c))
                EquipmentIdList.add(WorkPart.Equipment__c);
            WorkPartEquipmentMap.put(WorkPart.Id,WorkPart.Equipment__c);
        }
        List<Product2 > EquipmentDetailsList = [SELECT Id,Maintenance_Cycle__c FROM Product2 where Id in :EquipmentIdList];
        for(Product2 EquipmentDetails: EquipmentDetailsList){
            EquipmentMCycldeMap.put(EquipmentDetails.Id,EquipmentDetails.Maintenance_Cycle__c);
        }
        for(Work_Part__c WorkPart: WorkParts){
            WorkPartMCycleMap.put(WorkPart.Id,EquipmentMCycldeMap.get(WorkPartEquipmentMap.get(WorkPart.Id)));
        }
        system.debug(WorkPartMCycleMap);
        for(Case a: applicableCases.values()){
            Case newCase = new Case();
            newCase.Vehicle__c = a.Vehicle__c;
            newCase.Equipment__c = a.Equipment__c;
            newCase.Type = 'Routine Maintenance';
            newCase.Subject = String.isBlank(a.Subject) ? 'Routine Maintenance Request' : a.Subject;
            newCase.Date_Reported__c = a.CreatedDate.Date();
            newCase.Status = 'New';
            newCase.Product__c = a.Product__c;
            newCase.AccountId = a.AccountId;
            newCase.ContactId = a.ContactId;
            newCase.AssetId = a.AssetId;
            newCase.Origin = a.Origin;
            newCase.Reason = a.Reason;
            
            decimal minMaintenanceCycle = 0;
            for(Work_Part__c NewWork:WorkParts){
                if(NewWork.Maintenance_Request__c == a.Id){
                    if(minMaintenanceCycle > WorkPartMCycleMap.get(NewWork.Id) || minMaintenanceCycle == 0){
                        minMaintenanceCycle = WorkPartMCycleMap.get(NewWork.Id);
                        system.debug(WorkPartMCycleMap.get(NewWork.Id));
                    }
                }
                
            }
            newCase.Date_Due__c =  Date.today().addDays((integer)Math.ceil(minMaintenanceCycle));
            newCases.add(newCase);
        }
        if(newCases.size() > 0){
            insert newCases;
        }
    } 
}