const axios = require('axios');
const fs = require('fs');
const { spawnSync } = require('child_process');
const runCommand = (command, args) => spawnSync(command, args).stdout.toString().replace(/\n/g, "");

const FAIL_ON_ERROR = false;
const PW_BUILD_DATA_DIR = "./.postwoman";
const IS_DEV_MODE = process.argv.includes("--dev");

try {

	(async () => {
		// Create the build data directory if it does not exist.
		if (!fs.existsSync(PW_BUILD_DATA_DIR)) {
			fs.mkdirSync(PW_BUILD_DATA_DIR);
		}

		let version = {};
		// Get the current version name as the tag from Git.
		version.name = runCommand('git', ['tag']);

		// FALLBACK: If version.name was unset, let's grab it from GitHub.
		if(!version.name){
			version.name = (await axios.get("https://api.github.com/repos/liyasthomas/postwoman/releases")).data[0]['tag_name'];
		}

		// Get the current version hash as the short hash from Git.
		version.hash = runCommand('git', ['rev-parse', '--short', 'HEAD']);
		// Get the 'variant' name as the branch, if it's not master.
		version.variant = (process.env.TRAVIS_BRANCH || runCommand('git', ['branch']).split("* ")[1].split(" ")[0] + (IS_DEV_MODE ? " - (DEV MODE)" : ""));
		if(version.variant === "" || version.variant === "master") delete version.variant;

		// Write version data into a file
		fs.writeFileSync(PW_BUILD_DATA_DIR + "/version.json", JSON.stringify(version));
	})();

}catch(ex){
	console.error(ex);
	process.exit(FAIL_ON_ERROR ? 1 : 0);
}