"use strict";

const defaultValue = require("default-value");
const assureArray = require("assure-array");
const path = require("path");

const validateOptions = require("./validation/validate-options");
const bundle = require("./operations/bundle");
const productionServer = require("./operations/production-server");
const developmentServer = require("./operations/development-server");

function getDevelopmentMode(developmentModeSetting) {
	if (developmentModeSetting === "auto") {
		return (process.env.NODE_ENV === "development");
	} else {
		/* Hard-coded true or false */
		return developmentModeSetting;
	}
}

module.exports = function budoExpress(options = {}) {
	validateOptions(options);

	function projectPath(target) {
		return path.resolve(options.basePath, target);
	}

	let staticBasePath = projectPath(options.staticPath);

	let context = {
		options: options,
		entryPaths: assureArray(options.entryFiles).map((file) => projectPath(file)),
		staticBasePath: staticBasePath,
		staticPath: function staticPath(target) {
			return path.resolve(staticBasePath, target);
		}
	};

	if (process.env.BUDO_BUILD === "1") {
		return bundle(context);
	} else {
		let productionHost = defaultValue(options.host, "::");
		let developmentHost = (options.allowUnsafeHost) ? productionHost : "127.0.0.1";

		let developmentModeSetting = defaultValue(options.developmentMode, "auto");
		let developmentMode = getDevelopmentMode(developmentModeSetting);

		if (developmentMode) {
			return developmentServer({
				... context,
				host: developmentHost
			});
		} else {
			return productionServer({
				... context,
				host: productionHost
			});
		}
	}
};