#!/usr/bin/env node
/* index.js (C) 2020-present  SheetJS -- http://sheetjs.com */
/* eslint-env node */
/* vim: set ts=2 ft=javascript: */

var n = "xlsx-cli";
var X = require('xlsx');
require('exit-on-epipe');
var fs = require('fs'), program = require('commander');
function run() {
  program
    .version(X.version)
    .usage('[options] <file> [sheetname]')
    .option('-f, --file <file>', 'use specified workbook')
    .option('-s, --sheet <sheet>', 'print specified sheet (default first sheet)')
    .option('-N, --sheet-index <idx>', 'use specified sheet index (0-based)')
    .option('-p, --password <pw>', 'if file is encrypted, try with specified pw')
    .option('-l, --list-sheets', 'list sheet names and exit')
    .option('-o, --output <file>', 'output to specified file')

    .option('-B, --xlsb', 'emit XLSB to <sheetname> or <file>.xlsb')
    .option('-M, --xlsm', 'emit XLSM to <sheetname> or <file>.xlsm')
    .option('-X, --xlsx', 'emit XLSX to <sheetname> or <file>.xlsx')
    .option('-I, --xlam', 'emit XLAM to <sheetname> or <file>.xlam')
    .option('-Y, --ods', 'emit ODS  to <sheetname> or <file>.ods')
    .option('-8, --xls', 'emit XLS  to <sheetname> or <file>.xls (BIFF8)')
    .option('-5, --biff5', 'emit XLS  to <sheetname> or <file>.xls (BIFF5)')
    //.option('-4, --biff4','emit XLS  to <sheetname> or <file>.xls (BIFF4)')
    //.option('-3, --biff3','emit XLS  to <sheetname> or <file>.xls (BIFF3)')
    .option('-2, --biff2', 'emit XLS  to <sheetname> or <file>.xls (BIFF2)')
    .option('-i, --xla', 'emit XLA to <sheetname> or <file>.xla')
    .option('-6, --xlml', 'emit SSML to <sheetname> or <file>.xls (2003 XML)')
    .option('-T, --fods', 'emit FODS to <sheetname> or <file>.fods (Flat ODS)')
    .option('--wk3', 'emit WK3  to <sheetname> or <file>.txt (Lotus WK3)')

    .option('-S, --formulae', 'emit list of values and formulae')
    .option('-j, --json', 'emit formatted JSON (all fields text)')
    .option('-J, --raw-js', 'emit raw JS object (raw numbers)')
    .option('-A, --arrays', 'emit rows as JS objects (raw numbers)')
    .option('-H, --html', 'emit HTML to <sheetname> or <file>.html')
    .option('-D, --dif', 'emit DIF  to <sheetname> or <file>.dif (Lotus DIF)')
    .option('-U, --dbf', 'emit DBF  to <sheetname> or <file>.dbf (MSVFP DBF)')
    .option('-K, --sylk', 'emit SYLK to <sheetname> or <file>.slk (Excel SYLK)')
    .option('-P, --prn', 'emit PRN  to <sheetname> or <file>.prn (Lotus PRN)')
    .option('-E, --eth', 'emit ETH  to <sheetname> or <file>.eth (Ethercalc)')
    .option('-t, --txt', 'emit TXT  to <sheetname> or <file>.txt (UTF-8 TSV)')
    .option('-r, --rtf', 'emit RTF  to <sheetname> or <file>.txt (Table RTF)')
    .option('--wk1', 'emit WK1  to <sheetname> or <file>.txt (Lotus WK1)')
    .option('-z, --dump', 'dump internal representation as JSON')
    .option('--props', 'dump workbook properties as CSV')

    .option('-F, --field-sep <sep>', 'CSV field separator', ",")
    .option('-R, --row-sep <sep>', 'CSV row separator', "\n")
    .option('-n, --sheet-rows <num>', 'Number of rows to process (0=all rows)')
    .option('--codepage <cp>', 'default to specified codepage when ambiguous')
    .option('--req <module>', 'require module before processing')
    .option('--sst', 'generate shared string table for XLS* formats')
    .option('--compress', 'use compression when writing XLSX/M/B and ODS')
    .option('--read', 'read but do not generate output')
    .option('--book', 'for single-sheet formats, emit a file per worksheet')
    .option('--all', 'parse everything; write as much as possible')
    .option('--dev', 'development mode')
    .option('--sparse', 'sparse mode')
    .option('-q, --quiet', 'quiet mode');

  program.on('--help', function () {
  });

  /* flag, bookType, default ext */
  var workbook_formats = [
    ['xlsx', 'xlsx', 'xlsx'],
    ['xlsm', 'xlsm', 'xlsm'],
    ['xlam', 'xlam', 'xlam'],
    ['xlsb', 'xlsb', 'xlsb'],
    ['xls', 'xls', 'xls'],
    ['xla', 'xla', 'xla'],
    ['biff5', 'biff5', 'xls'],
    ['ods', 'ods', 'ods'],
    ['fods', 'fods', 'fods'],
    ['wk3', 'wk3', 'wk3']
  ];
  var wb_formats_2 = [
    ['xlml', 'xlml', 'xls']
  ];
  program.parse(process.argv);

  var filename = '', sheetname = '';
  if (program.args[0]) {
    filename = program.args[0];
    if (program.args[1]) sheetname = program.args[1];
  }
  if (program.sheet) sheetname = program.sheet;
  if (program.file) filename = program.file;

  if (!filename) {
    console.error(n + ": must specify a filename");
    process.exit(1);
  }
  if (!fs.existsSync(filename)) {
    console.error(n + ": " + filename + ": No such file or directory");
    process.exit(2);
  }

  if (program.req) program.req.split(",").forEach(function (r) {
    require((fs.existsSync(r) || fs.existsSync(r + '.js')) ? require('path').resolve(r) : r);
  });

  var opts = {}, wb/*:?Workbook*/;
  if (program.listSheets) opts.bookSheets = true;
  if (program.sheetRows) opts.sheetRows = program.sheetRows;
  if (program.password) opts.password = program.password;
  var seen = false;
  function wb_fmt() {
    seen = true;
    opts.cellFormula = true;
    opts.cellNF = true;
    if (program.output) sheetname = program.output;
  }
  function isfmt(m/*:string*/)/*:boolean*/ {
    if (!program.output) return false;
    var t = m.charAt(0) === "." ? m : "." + m;
    return program.output.slice(-t.length) === t;
  }
  workbook_formats.forEach(function (m) { if (program[m[0]] || isfmt(m[0])) { wb_fmt(); } });
  wb_formats_2.forEach(function (m) { if (program[m[0]] || isfmt(m[0])) { wb_fmt(); } });
  if (seen) {
  } else if (program.formulae) opts.cellFormula = true;
  else opts.cellFormula = false;

  var wopts = ({ WTF: opts.WTF, bookSST: program.sst }/*:any*/);
  if (program.compress) wopts.compression = true;

  if (program.all) {
    opts.cellFormula = true;
    opts.bookVBA = true;
    opts.cellNF = true;
    opts.cellHTML = true;
    opts.cellStyles = true;
    opts.sheetStubs = true;
    opts.cellDates = true;
    wopts.cellStyles = true;
    wopts.sheetStubs = true;
    wopts.bookVBA = true;
  }
  if (program.sparse) opts.dense = false; else opts.dense = true;
  if (program.codepage) opts.codepage = +program.codepage;

  if (program.dev) {
    opts.WTF = true;
    wb = X.readFile(filename, opts);
  } else try {
    wb = X.readFile(filename, opts);
  } catch (e) {
    var msg = (program.quiet) ? "" : n + ": error parsing ";
    msg += filename + ": " + e;
    console.error(msg);
    process.exit(3);
  }
  if (program.read) process.exit(0);
  if (!wb) { console.error(n + ": error parsing " + filename + ": empty workbook"); process.exit(0); }
  /*:: if(!wb) throw new Error("unreachable"); */
  if (program.listSheets) {
    console.log((wb.SheetNames || []).join("\n"));
    process.exit(0);
  }
  if (program.dump) {
    console.log(JSON.stringify(wb));
    process.exit(0);
  }
  if (program.props) {
    if (wb) dump_props(wb);
    process.exit(0);
  }

  /* full workbook formats */
  workbook_formats.forEach(function (m) {
    if (program[m[0]] || isfmt(m[0])) {
      wopts.bookType = m[1];
      if (wb) X.writeFile(wb, program.output || sheetname || ((filename || "") + "." + m[2]), wopts);
      process.exit(0);
    }
  });

  wb_formats_2.forEach(function (m) {
    if (program[m[0]] || isfmt(m[0])) {
      wopts.bookType = m[1];
      if (wb) X.writeFile(wb, program.output || sheetname || ((filename || "") + "." + m[2]), wopts);
      process.exit(0);
    }
  });

  var target_sheet = sheetname || '';
  if (target_sheet === '') {
    if (+program.sheetIndex < (wb.SheetNames || []).length) target_sheet = wb.SheetNames[+program.sheetIndex];
    else target_sheet = (wb.SheetNames || [""])[0];
  }

  var ws;
  try {
    ws = wb.Sheets[target_sheet];
    if (!ws) {
      console.error("Sheet " + target_sheet + " cannot be found");
      process.exit(3);
    }
  } catch (e) {
    console.error(n + ": error parsing " + filename + " " + target_sheet + ": " + e);
    process.exit(4);
  }

  if (!program.quiet && !program.book) console.error(target_sheet);

  /* single worksheet file formats */
  [
    ['biff2', '.xls'],
    ['biff3', '.xls'],
    ['biff4', '.xls'],
    ['sylk', '.slk'],
    ['html', '.html'],
    ['prn', '.prn'],
    ['eth', '.eth'],
    ['rtf', '.rtf'],
    ['txt', '.txt'],
    ['dbf', '.dbf'],
    ['wk1', '.wk1'],
    ['dif', '.dif']
  ].forEach(function (m) {
    if (program[m[0]] || isfmt(m[1])) {
      wopts.bookType = m[0];
      if (program.book) {
        /*:: if(wb == null) throw new Error("Unreachable"); */
        wb.SheetNames.forEach(function (n, i) {
          wopts.sheet = n;
          X.writeFile(wb, (program.output || sheetname || filename || "") + m[1] + "." + i, wopts);
        });
      } else X.writeFile(wb, program.output || sheetname || ((filename || "") + m[1]), wopts);
      process.exit(0);
    }
  });

  function outit(o, fn) { if (fn) fs.writeFileSync(fn, o); else console.log(o); }

  function doit(cb) {
    /*:: if(!wb) throw new Error("unreachable"); */
    if (program.book) wb.SheetNames.forEach(function (n, i) {
      /*:: if(!wb) throw new Error("unreachable"); */
      outit(cb(wb.Sheets[n]), (program.output || sheetname || filename) + "." + i);
    });
    else outit(cb(ws), program.output);
  }

  var jso = {};
  switch (true) {
    case program.formulae:
      doit(function (ws) { return X.utils.sheet_to_formulae(ws).join("\n"); });
      break;

    case program.arrays: jso.header = 1;
    /* falls through */
    case program.rawJs: jso.raw = true;
    /* falls through */
    case program.json:
      doit(function (ws) { return JSON.stringify(X.utils.sheet_to_json(ws, jso)); });
      break;

    default:
      if (!program.book) {
        var stream = X.stream.to_csv(ws, { FS: program.fieldSep, RS: program.rowSep });
        if (program.output) stream.pipe(fs.createWriteStream(program.output));
        else stream.pipe(process.stdout);
      } else doit(function (ws) { return X.utils.sheet_to_csv(ws, { FS: program.fieldSep, RS: program.rowSep }); });
      break;
  }

  function dump_props(wb/*:Workbook*/) {
    var propaoa = [];
    if (Object.assign && Object.entries) propaoa = Object.entries(Object.assign({}, wb.Props, wb.Custprops));
    else {
      var Keys/*:: :Array<string> = []*/, pi;
      if (wb.Props) {
        Keys = Object.keys(wb.Props);
        for (pi = 0; pi < Keys.length; ++pi) {
          if (Object.prototype.hasOwnProperty.call(Keys, Keys[pi])) propaoa.push([Keys[pi], Keys[/*::+*/Keys[pi]]]);
        }
      }
      if (wb.Custprops) {
        Keys = Object.keys(wb.Custprops);
        for (pi = 0; pi < Keys.length; ++pi) {
          if (Object.prototype.hasOwnProperty.call(Keys, Keys[pi])) propaoa.push([Keys[pi], Keys[/*::+*/Keys[pi]]]);
        }
      }
    }
    console.log(X.utils.sheet_to_csv(X.utils.aoa_to_sheet(propaoa)));
  }
}

module.exports = run;
