#!/usr/bin/env -S deno --allow-net --allow-env
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import { parse } from "https://deno.land/std/flags/mod.ts";

function pathBase(p: string): string {
  const parts = p.split("/");
  return parts[parts.length - 1];
}

const token = Deno.env()["GIST_TOKEN"];
if (!token) {
  console.error("GIST_TOKEN environmental variable not set.");
  console.error("Get a token here: https://github.com/settings/tokens");
  Deno.exit(1);
}

const parsedArgs = parse(Deno.args.slice(1));

if (parsedArgs._.length === 0) {
  console.error(
    "Usage: gist.ts --allow-env --allow-net [-t|--title Example] some_file " +
      "[next_file]"
  );
  Deno.exit(1);
}

const files = {};
for (const filename of parsedArgs._) {
  const base = pathBase(filename);
  const content = await Deno.readFile(filename);
  const contentStr = new TextDecoder().decode(content);
  files[base] = { content: contentStr };
}

const content = {
  description: parsedArgs.title || parsedArgs.t || "Example",
  public: false,
  files: files
};
const body = JSON.stringify(content);

const res = await fetch("https://api.github.com/gists", {
  method: "POST",
  headers: [
    ["Content-Type", "application/json"],
    ["User-Agent", "Deno-Gist"],
    ["Authorization", `token ${token}`]
  ],
  body
});

if (res.ok) {
  const resObj = await res.json();
  console.log("Success");
  console.log(resObj["html_url"]);
} else {
  const err = await res.text();
  console.error("Failure to POST", err);
}