const UXP = require("uxp");
const XLSX = require("./xlsx.full.min.js");
const storage = UXP.storage, ufs = storage.localFileSystem;

/* show file picker (single file, no folders) */
const file = await ufs.getFileForOpening({ types: ["xlsx", "xls", "xlsb"] });
/* read data into an ArrayBuffer */
const ab = await file.read({ format: storage.formats.binary });
/* parse with SheetJS */
const wb = XLSX.read(ab), wsname = wb.SheetNames[0];
const data = XLSX.utils.sheet_to_json(wb.Sheets[wsname], { header: 1, raw: false });

/* Set title */
app.activeDocument.textFrames.itemByName("Title").texts.item(0).contents = wsname;

/* Set table */
var tabeller = app.activeDocument.textFrames.itemByName("Table Frame");
var columns = data[0].length;
for(var R = 0; R < data.length; ++R) columns = Math.max(columns, data[R].length);
var table = tabeller.tables.add({
  headerRowCount: 1,
  bodyRowCount: data.length - 1,
  columnCount: columns
});
for(R = 0; R < data.length; ++R) {
  if(data[R] == null) continue;
  for(var C = 0; C < data[R].length; ++C) {
    if(data[R][C] == null) continue;
    table.rows.item(R).cells.item(C).contents = data[R][C];
  }
}
