const SHEET_ID='1J_yZ1p8vgwwJkcVO_HDl_ewSv_TfhwP636PKJYRcLCI';
const FOLDER_ID='1WkEgm8W7P_L1R-S590DrHmxcWjInVm4e';
const HEADERS={Patients:['id','name','uhid','age','sex','dob','bg','phone','address','diag','txDate','txType','status','history','plan'],Evaluations:['id','name','uhid','age','sex','bg','type','indication','meld','ctp','status','date','notes','pairedId','pairRelation','txDate','donorUhid','donorStages'],Waitlist:['id','reg','name','age','sex','bg','meld','ctp','indication','date','status','hospital','notes'],MDT:['id','date','patient','type','decision','attendees','summary','steps'],OPD:['id','date','count','surgeon','location','notes'],Events:['id','date','time','title','type','surgeon','patient','notes','createdBy','isDeptMeeting'],Leaves:['id','surgeon','from','to','reason','notes'],Users:['id','name','desg','username','email','role','lastActive'],Messages:['id','from','initials','color','preview','time','unread','thread'],_LOGBOOK_HDR:['id','date','patient','agesex','bg','procedure','category','role','leadName','blood','duration','graft','grwr','cit','wit','outcome','thirtyDay','notes','uhid']};
function getHeaders(tab){return tab.startsWith('Logbook_')?HEADERS._LOGBOOK_HDR:HEADERS[tab]||null;}
function jsonOut(obj){return ContentService.createTextOutput(JSON.stringify(obj)).setMimeType(ContentService.MimeType.JSON);}
function doGet(e){try{var tab=e.parameter.tab||'Patients';var ss=SpreadsheetApp.openById(SHEET_ID);if(tab==='ALL'){var result={};var allTabs=['Patients','Evaluations','Waitlist','Logbook','MDT','OPD','Events','Leaves','Users','Messages'];for(var i=0;i<allTabs.length;i++){var t=allTabs[i];var sh=ss.getSheetByName(t);result[t]=sh?sh.getDataRange().getValues():[];}var sheets=ss.getSheets();for(var j=0;j<sheets.length;j++){var sn=sheets[j].getName();if(sn.startsWith('Logbook_')&&!result[sn])result[sn]=sheets[j].getDataRange().getValues();}return jsonOut({ok:true,data:result});}var sheet=ss.getSheetByName(tab);if(!sheet){sheet=ss.insertSheet(tab);var hdr=getHeaders(tab);if(hdr)sheet.appendRow(hdr);}return jsonOut({ok:true,data:sheet.getDataRange().getValues()});}catch(err){return jsonOut({ok:false,error:err.message});}}
function doPost(e){try{var payload=JSON.parse(e.postData.contents);var ss=SpreadsheetApp.openById(SHEET_ID);var action=payload.action||'';if(action==='uploadFile'){var folder=DriveApp.getFolderById(FOLDER_ID);var targetFolder=folder;if(payload.folderKey){var subs=folder.getFoldersByName(payload.folderKey);targetFolder=subs.hasNext()?subs.next():folder.createFolder(payload.folderKey);}var storedName=(payload.label?payload.label+'_':'')+payload.fileName;var decoded=Utilities.base64Decode(payload.base64Data);var blob=Utilities.newBlob(decoded,payload.mimeType||'application/octet-stream',storedName);var file=targetFolder.createFile(blob);file.setSharing(DriveApp.Access.ANYONE_WITH_LINK,DriveApp.Permission.VIEW);return jsonOut({ok:true,success:true,fileId:file.getId(),viewUrl:file.getUrl(),downloadUrl:'https://drive.google.com/uc?export=download&id='+file.getId(),fileName:file.getName(),folder:payload.folderKey||'root'});}if(action==='listFiles'){var folder=DriveApp.getFolderById(FOLDER_ID);var allFiles=[];_collectFiles(folder,'',allFiles);var subFolders=folder.getFolders();while(subFolders.hasNext()){var sf=subFolders.next();_collectFiles(sf,sf.getName(),allFiles);}return jsonOut({ok:true,success:true,files:allFiles});}if(action==='deleteFile'){if(payload.fileId)DriveApp.getFileById(payload.fileId).setTrashed(true);return jsonOut({ok:true,success:true});}var tab=payload.tab;if(!tab)return jsonOut({ok:false,error:'Missing tab'});var sheet=ss.getSheetByName(tab);if(!sheet){sheet=ss.insertSheet(tab);var hdr=getHeaders(tab);if(hdr)sheet.appendRow(hdr);}if(action==='sync'){var lastRow=sheet.getLastRow();if(lastRow>1)sheet.deleteRows(2,lastRow-1);if(payload.rows&&payload.rows.length>0)sheet.getRange(2,1,payload.rows.length,payload.rows[0].length).setValues(payload.rows);}else if(action==='upsert'){var id=String(payload.row[0]);var data=sheet.getDataRange().getValues();var found=false;for(var i=1;i<data.length;i++){if(String(data[i][0])===id){sheet.getRange(i+1,1,1,payload.row.length).setValues([payload.row]);found=true;break;}}if(!found)sheet.appendRow(payload.row);}else if(action==='delete'){var id=String(payload.id);var data=sheet.getDataRange().getValues();for(var i=data.length-1;i>=1;i--){if(String(data[i][0])===id){sheet.deleteRow(i+1);break;}}}return jsonOut({ok:true});}catch(err){return jsonOut({ok:false,error:err.message});}}
function _collectFiles(folder,folderName,arr){var files=folder.getFiles();while(files.hasNext()){var f=files.next();arr.push({fileId:f.getId(),fileName:f.getName(),folder:folderName||'root',mimeType:f.getMimeType(),size:f.getSize(),viewUrl:f.getUrl(),downloadUrl:'https://drive.google.com/uc?export=download&id='+f.getId(),createdAt:f.getDateCreated().toISOString(),updatedAt:f.getLastUpdated().toISOString()});}}