global without sharing class Batch_FixAttachmentToFiles implements Database.Batchable<sObject>{
    // Id batchJobId = Database.executeBatch(new Batch_FixAttachmentToFiles('Consumable_order__c',Datetime.newInstance(2023, 1, 1, 8, 0, 0),Datetime.newInstance(2024, 1, 1, 8, 0, 0)),2000);
    private Datetime creStartDate = null;
    private Datetime creEndDate = null;
    private String objectApiName  = null;
    private Set<String> parentIds = new Set<String>();//Add by Li Jun 20230703 
    public Batch_FixAttachmentToFiles(String objectType, Datetime startTime, Datetime endTime) {
        creStartDate = startTime;
        creEndDate = endTime;
        objectApiName = objectType;
    }
    //Add by Li Jun 20230703 Start
    public Batch_FixAttachmentToFiles(Set<String> parentIds) {
        this.parentIds = parentIds;
    }
     //Add by Li Jun 20230703 End
    global Database.QueryLocator start(Database.BatchableContext BC) {
        String queryObject = 'SELECT Id, Name, OwnerId, ParentId, Parent.Name, Parent.Type, Body, CreatedDate, CreatedById FROM Attachment WHERE Parent.Type =:objectApiName AND CreatedDate >=:creStartDate AND CreatedDate <:creEndDate Order by CreatedDate ASC';
        if(parentIds.size() > 0){
            queryObject = 'SELECT Id, Name, OwnerId, ParentId, Parent.Name, Parent.Type, Body, CreatedDate, CreatedById FROM Attachment WHERE ParentId in:parentIds';
        }
        return Database.getQueryLocator(queryObject);
    }

    global void execute(Database.BatchableContext BC, List<Attachment> scope) {
        List<ContentVersion> insertContents = new List<ContentVersion>();
        Map<string,id> nameParentMaps = new Map<string,id>();  
        Set<String> attachmentIds = new Set<String>();   
        for (Attachment att : scope) {
            nameParentMaps.put(att.Id, att.ParentId);
            attachmentIds.add(att.Id);   
            ContentVersion cVersion = new ContentVersion();
            cVersion.ContentLocation = 'S';     //S-Document is in Salesforce. E-Document is outside of Salesforce. L-Document is on a Social Netork.
            cVersion.PathOnClient = att.Id;   //File name with extention
            cVersion.Origin = 'C';              //C-Content Origin. H-Chatter Origin.   
            cVersion.Title = att.Name;          //Name of the file
            cVersion.VersionData = att.Body;    //File content
            insertContents.add(cVersion);                            
        }
        if(insertContents.isEmpty()){
            return;
        }
        //Insert insertContents;
        List<Database.SaveResult> saveResultsContents = Database.insert(insertContents, false);
        insertLog(saveResultsContents,attachmentIds);
        set<Id> contentIds = new set<Id>();
        for(ContentVersion cv : insertContents){
            contentIds.add(cv.id);
        }
        List<ContentVersion> conDocuments = [SELECT ContentDocumentId, Title,PathOnClient FROM ContentVersion WHERE Id in: contentIds];
        List<ContentDocumentLink> insertDocLinks = new List<ContentDocumentLink>();  
        for(ContentVersion cv : conDocuments){
            ContentDocumentLink cDocLink = new ContentDocumentLink();
            cDocLink.ContentDocumentId = cv.ContentDocumentId;          //Add ContentDocumentId
            cDocLink.LinkedEntityId = nameParentMaps.get(cv.PathOnClient);     //Add attachment parentId
            cDocLink.ShareType = 'V';                                   //V - Viewer permission. C - Collaborator permission. I - Inferred permission.
            cDocLink.Visibility = 'AllUsers';
            insertDocLinks.add(cDocLink);
        }
        //Insert insertDocLinks;
        List<Database.SaveResult> saveResultsLinks = Database.insert(insertDocLinks, false);
        insertLog(saveResultsLinks,attachmentIds);
    }

    global void insertLog(List<Database.SaveResult> saveResults,Set<String> attachmentIds) {
        Transaction_Log__c traLog = new Transaction_Log__c();
        List<Map<String,String>> logMapList = new List<Map<String,String>>();
        for (Database.SaveResult result : saveResults) {
            String recordId = result.getId();
            if (!result.isSuccess()) {
                for (Database.Error error : result.getErrors()) {
                    Map<String,String> logMap = new Map<String,String>();
                    String errorMsg = error.getMessage();
                    logMap.put('recordId',recordId);
                    logMap.put('errorMsg',errorMsg);
                    logMapList.add(logMap);
                }
            }
        }
        if(logMapList.size() > 0){
            Map<String,String> attachmentIdMap = new Map<String,String>();
            attachmentIdMap.put('attachmentIds',JSON.serialize(attachmentIds));
            logMapList.add(attachmentIdMap);
            traLog.Response__c = JSON.serialize(logMapList);
            traLog.Module__c = 'Attachment COnvert Transaction ';
            Insert traLog;
        }
    }



    global void finish(Database.BatchableContext BC) {

    }
}