function doPost(e) {
  try {
    var contents = JSON.parse(e.postData.contents);
    var action = contents.action;
    var data = contents.data;
    var ss = SpreadsheetApp.getActiveSpreadsheet();
    
    getOrCreateSheet(ss, "Pengkajian");
    getOrCreateSheet(ss, "PIO");
    getOrCreateSheet(ss, "Konseling");
    getOrCreateSheet(ss, "CekKesehatan");
    getOrCreateSheet(ss, "Pasien");

    if (action === "getAllData") {
      return responseJSON({
        status: "success",
        data: {
          pengkajian: getSheetData(ss, "Pengkajian"),
          pio: getSheetData(ss, "PIO"),
          konseling: getSheetData(ss, "Konseling"),
          cekKesehatan: getSheetData(ss, "CekKesehatan"),
          pasien: getSheetData(ss, "Pasien")
        }
      });
    }

    if (action === "savePengkajian") { saveToSheet(ss, "Pengkajian", data); return responseJSON({ status: "success" }); }
    if (action === "deletePengkajian") { deleteFromSheet(ss, "Pengkajian", data.id); return responseJSON({ status: "success" }); }
    if (action === "savePIO") { saveToSheet(ss, "PIO", data); return responseJSON({ status: "success" }); }
    if (action === "deletePIO") { deleteFromSheet(ss, "PIO", data.id); return responseJSON({ status: "success" }); }
    if (action === "saveKonseling") { saveToSheet(ss, "Konseling", data); return responseJSON({ status: "success" }); }
    if (action === "deleteKonseling") { deleteFromSheet(ss, "Konseling", data.id); return responseJSON({ status: "success" }); }
    if (action === "saveCekKesehatan") { saveToSheet(ss, "CekKesehatan", data); return responseJSON({ status: "success" }); }
    if (action === "deleteCekKesehatan") { deleteFromSheet(ss, "CekKesehatan", data.id); return responseJSON({ status: "success" }); }
    if (action === "savePasien") { saveToSheet(ss, "Pasien", data); return responseJSON({ status: "success" }); }

    return responseJSON({ status: "error", message: "Unknown action" });
  } catch (err) {
    return responseJSON({ status: "error", message: err.toString() });
  }
}

function doGet(e) {
  return ContentService.createTextOutput("ApoCare Pro Backend Active").setMimeType(ContentService.MimeType.TEXT);
}

function responseJSON(obj) {
  return ContentService.createTextOutput(JSON.stringify(obj)).setMimeType(ContentService.MimeType.JSON);
}

function getOrCreateSheet(ss, name) {
  var sheet = ss.getSheetByName(name);
  if (!sheet) { sheet = ss.insertSheet(name); }
  return sheet;
}

function getSheetData(ss, sheetName) {
  var sheet = ss.getSheetByName(sheetName);
  var data = sheet.getDataRange().getValues();
  if (data.length <= 1) return [];
  var headers = data[0];
  var result = [];
  for (var i = 1; i < data.length; i++) {
    var row = data[i];
    var obj = {};
    for (var j = 0; j < headers.length; j++) {
      var val = row[j];
      if (headers[j] === "checklist" || headers[j] === "materi") {
        try { val = JSON.parse(val); } catch(e) {}
      }
      obj[headers[j]] = val;
    }
    result.push(obj);
  }
  return result;
}

function saveToSheet(ss, sheetName, item) {
  var sheet = ss.getSheetByName(sheetName);
  var data = sheet.getDataRange().getValues();
  var headers = [];
  if (data.length === 0 || data[0].length === 0) {
    headers = Object.keys(item);
    sheet.appendRow(headers);
  } else {
    headers = data[0];
  }
  var existingRowIndex = -1;
  var idColIndex = headers.indexOf("id");
  if (idColIndex !== -1 && data.length > 1) {
    for (var i = 1; i < data.length; i++) {
      if (String(data[i][idColIndex]) === String(item.id)) { existingRowIndex = i + 1; break; }
    }
  }
  var rowData = headers.map(function(h) {
    var val = item[h] !== undefined ? item[h] : "";
    if (typeof val === "object") val = JSON.stringify(val);
    return val;
  });
  if (existingRowIndex !== -1) {
    sheet.getRange(existingRowIndex, 1, 1, rowData.length).setValues([rowData]);
  } else {
    sheet.appendRow(rowData);
  }
}

function deleteFromSheet(ss, sheetName, itemId) {
  var sheet = ss.getSheetByName(sheetName);
  var data = sheet.getDataRange().getValues();
  if (data.length <= 1) return;
  var headers = data[0];
  var idColIndex = headers.indexOf("id");
  if (idColIndex === -1) return;
  for (var i = 1; i < data.length; i++) {
    if (String(data[i][idColIndex]) === String(itemId)) { sheet.deleteRow(i + 1); break; }
  }
}