#!/usr/bin/env node
"use strict";
/* eslint-disable no-process-exit */
const path = require("path");
const mkdirp = require("mkdirp-then");
const rimraf = require("rimraf-then");
const yargs = require("yargs");

const packageJson = require("../package.json");
const download = require("./download.js");
const convert = require("./convert.js");
const scaffold = require("./scaffold.js");
const zip = require("./zip.js");

const argv = yargs
  .usage(`${packageJson.description}\n\n${packageJson.name} [<command1> [<command2> [<command3> ...]]]\n\n` +
         "Each command will fail if the previously-listed one has not yet been run (with matching options).")
  .command("download", "download all chapters by crawling parahumans.wordpress.com")
  .command("convert", "convert the raw chapter HTML files into cleaned-up ebook chapters")
  .command("scaffold", "assemble the table of contents, etc. to complete the EPUB")
  .command("zip", "zip up the EPUB files into a .epub output")
  .option("s", {
    alias: "start-url",
    default: "https://parahumans.wordpress.com/2011/06/11/1-1/",
    describe: "the URL from which to start crawling, for the download command",
    requiresArg: true,
    global: true
  })
  .option("c", {
    alias: "cache-directory",
    default: "cache",
    describe: "cache directory, for the download and convert commands",
    requiresArg: true,
    global: true
  })
  .option("b", {
    alias: "book-directory",
    default: "book",
    describe: "directory in which to assemble the EPUB files before zipping, for the convert, scaffold, and zip " +
              "commands",
    requiresArg: true,
    global: true
  })
  .option("o", {
    alias: "out",
    default: "Worm.epub",
    describe: "output file destination, for the zip command",
    requiresArg: true,
    global: true
  })
  .demandCommand(1) // TODO remove and allow all
  .recommendCommands()
  .help()
  .version()
  .argv;

const cachePath = path.resolve(argv.cacheDirectory);
const manifestPath = path.resolve(cachePath, "manifest.json");

const scaffoldingPath = path.resolve(__dirname, "../scaffolding");
const bookPath = path.resolve(argv.bookDirectory);
const contentPath = path.resolve(bookPath, "OEBPS");
const chaptersPath = path.resolve(contentPath, "chapters");

const commands = [];

if (argv._.includes("download")) {
  commands.push(() => download(argv.startUrl, cachePath, manifestPath));
}

if (argv._.includes("convert")) {
  commands.push(() => {
    return rimraf(chaptersPath)
      .then(() => mkdirp(chaptersPath))
      .then(() => convert(cachePath, manifestPath, chaptersPath));
  });
}

if (argv._.includes("scaffold")) {
  commands.push(() => scaffold(scaffoldingPath, bookPath, contentPath, chaptersPath, manifestPath));
}

if (argv._.includes("zip")) {
  commands.push(() => zip(bookPath, contentPath, path.resolve(argv.out)));
}

(async () => {
  try {
    for (const command of commands) {
      await command();
    }

    console.log("All done!");
  } catch (e) {
    console.error(e.stack);
    process.exit(1);
  }
})();