#!/bin/bash
# https://docs.sheetjs.com/docs/getting-started/installation/bun

cd /tmp
rm -rf sheetjs-bun-dle
mkdir sheetjs-bun-dle
cd sheetjs-bun-dle
echo "{}" > package.json

bun install https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz || bun install xlsx@https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz

cat <<EOF >SheetJSBun.js
import * as XLSX from 'xlsx';
import * as fs from 'fs';
XLSX.set_fs(fs);

/* fetch JSON data and parse */
const url = "https://docs.sheetjs.com/executive.json";
const raw_data = await (await fetch(url)).json();

/* filter for the Presidents */
const prez = raw_data.filter(row => row.terms.some(term => term.type === "prez"));

/* sort by first presidential term */
prez.forEach(row => row.start = row.terms.find(term => term.type === "prez").start);
prez.sort((l,r) => l.start.localeCompare(r.start));

/* flatten objects */
const rows = prez.map(row => ({
  name: row.name.first + " " + row.name.last,
  birthday: row.bio.birthday
}));

/* generate worksheet and workbook */
const worksheet = XLSX.utils.json_to_sheet(rows);
const workbook = XLSX.utils.book_new();
XLSX.utils.book_append_sheet(workbook, worksheet, "Dates");

/* fix headers */
XLSX.utils.sheet_add_aoa(worksheet, [["Name", "Birthday"]], { origin: "A1" });

/* calculate column width */
const max_width = rows.reduce((w, r) => Math.max(w, r.name.length), 10);
worksheet["!cols"] = [ { wch: max_width } ];

/* create an XLSX file and try to save to Presidents.xlsx */
XLSX.writeFile(workbook, "Presidents.xlsx");
EOF

bun build --target=bun SheetJSBun.js --outfile=app.js
rm -f package.json bun.lockb bun.lock SheetJSBun.js
rm -rf ./node_modules

bun app.js
bunx xlsx-cli Presidents.xlsx