"use strict";

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };

var Promise = require("bluebird");
var pathToRegexp = require("path-to-regexp");
var url = require("url");
var xtend = require("xtend");
var defaultValue = require("default-value");

module.exports = function () {
	var routes = [];

	function addRoute(method, path, handler) {
		// Mutable arguments? WTF.
		var keys = [];
		var regex = pathToRegexp(path, keys);

		routes.push({ method: method, path: path, regex: regex, keys: keys, handler: handler });
	}

	function getRoute(method, path) {
		var matches = void 0;
		var matchingRoute = routes.find(function (route) {
			return route.method === method && (matches = route.regex.exec(path));
		});

		if (matchingRoute == null) {
			throw new Error("No matching routes found");
		} else {
			var _ret = function () {
				var params = {};

				matchingRoute.keys.forEach(function (key, i) {
					params[key] = matches[i + 1];
				});

				return {
					v: {
						handler: matchingRoute.handler,
						params: params
					}
				};
			}();

			if ((typeof _ret === "undefined" ? "undefined" : _typeof(_ret)) === "object") return _ret.v;
		}
	}

	function handle(method, uri, data) {
		return Promise.try(function () {
			var _url$parse = url.parse(uri, true);

			var path = _url$parse.path;
			var query = _url$parse.query;

			var route = getRoute(method, path);
			var tasks = [];

			var req = {
				path: path,
				query: query,
				body: data,
				params: route.params,
				pass: function pass() {
					// FIXME: window.fetch passthrough

					var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
				},
				passRender: function passRender(viewName) {
					var _this = this;

					var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];

					return Promise.try(function () {
						return _this.pass(options);
					}).then(function (response) {
						var locals = defaultValue(options.locals, {});
						var combinedLocals = xtend(locals, response.body);

						res.render(viewName, combinedLocals, options);
					});
				}
			};

			var res = {
				render: function render(viewName) {
					var locals = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
					var options = arguments.length <= 2 || arguments[2] === undefined ? {} : arguments[2];

					tasks.push({
						type: "render",
						viewName: viewName, locals: locals, options: options
					});
				},
				open: function open(path) {
					var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];

					tasks.push({
						type: "open",
						path: path, options: options
					});
				},
				close: function close() {
					var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];

					tasks.push({
						type: "close",
						options: options
					});
				},
				notify: function notify(message) {
					var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];

					tasks.push({
						type: "notify",
						message: message, options: options
					});
				},
				error: function error(_error) {
					var context = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];

					tasks.push({
						type: "error",
						error: _error, context: context
					});
				}
			};

			return Promise.try(function () {
				return route.handler(req, res);
			}).then(function (result) {
				return {
					result: result,
					actions: tasks
				};
			});
		});
	}

	var api = {
		get: addRoute.bind(api, "get"),
		post: addRoute.bind(api, "post"),
		put: addRoute.bind(api, "put"),
		delete: addRoute.bind(api, "delete"),
		head: addRoute.bind(api, "head"),
		patch: addRoute.bind(api, "patch"),
		addRoute: addRoute,
		handle: handle
	};

	return api;
};