#!/usr/bin/env node
import path from "path";
import fs from "vinyl-fs";
import map from "map-stream";
import tokenize from "./tokenize.js";
import toHTML from "./to-html.js";
import yargs from "yargs";

// TODO: automatically pull these in from gmi.css (also for gmi.css(5))
const GMI_CSS_VARS = [
  "foreground",
  "background",
  "p-size",
  "p-indent",
  "p-line-height",
  "a-size",
  "pre-size",
  "pre-line-height",
  "h1-size",
  "h2-size",
  "h3-size",
  "heading-line-height",
  "ul-size",
  "ul-line-height",
  "blockquote-size",
  "blockquote-line-height",
  "mono",
  "serif",
  "sans-serif",
];

yargs(process.argv.slice(2))
  .scriptName("gmi-web")
  .config()
  .command(
    "$0 [files..]",
    "Convert .gmi to .html. See gmi-web(1) for more details.",
    (yargs) =>
      yargs
        .positional("files", {
          describe: "The *.gmi files to convert",
        })
        .required("files", true)
        .option("language", {
          alias: "lang",
          required: true,
          type: "string",
          describe: "Set the document meta language tag",
        })
        .option("images", {
          type: "boolean",
          default: false,
          describe: "Include images",
        })
        .option("audio", {
          type: "boolean",
          default: false,
          describe: "Include audio",
        })
        .option("video", {
          type: "boolean",
          default: false,
          describe: "Include video",
        })
        .option("css", {
          type: "boolean",
          default: true,
          describe:
            "gmi.css is included by default. Use --no-css for the bare minimum <style>",
        }),
    (argv) => {
      const override = GMI_CSS_VARS.reduce((style, key) => {
        if (argv[key]) {
          style += `--${key}: ${argv[key]};`;
        }
        return style;
      }, "");
      fs.src(argv.files)
        .pipe(map(tokenize))
        .pipe(
          map(
            toHTML({
              ...argv,
              override,
            })
          )
        )
        .pipe(fs.dest((file) => path.dirname(file.path)));
    }
  )
  .showHelpOnFail(true, "Specify --help for available options")
  .help().argv;