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) {
  }
}