-- Copyright (C) 2008-2012 Matthew Wild

-- Copyright (C) 2008-2012 Waqas Hussain

local parse_url = require "socket.url".parse;

local server = require "net.http.server";

local function normalize_path(path)

	if path:sub(1,1) ~= "/" then path = "/"..path; end

	if path:sub(-1,-1) == "/" then path = path:sub(1, -2); end

	return path;

end

local function get_http_event(http_module, app_name, key)

	local method, path = key:match("^(%S+)%s+(.+)$");

	if not method and key:sub(1,1) == "/" then

		method, path = "GET", key;

	else

		return nil;

	end

	path = normalize_path(path);

	local app_path = normalize_path(http_module:get_option_string(app_name.."_http_path", "/"..app_name));

	return method:upper().." "..http_module.host..app_path..path;

end

function module.add_host(module)

	local apps = {};

	module.environment.apps = apps;

	local function http_app_added(event)

		local app_name = event.item.name;

		if not app_name then		

			-- TODO: Link to docs

			module:log("error", "HTTP app has no 'name', add one or use module:provides('http', app)");

			return;

		end

		apps[app_name] = apps[app_name] or {};

		local app_handlers = apps[app_name];

		for key, handler in pairs(event.item.route or {}) do

			local event_name = get_http_event(module, app_name, key);

			if event_name then

				if not app_handlers[event_name] then

					app_handlers[event_name] = handler;

					server.add_handler(event_name, handler);

				else

					module:log("warn", "App %s added handler twice for '%s', ignoring", app_name, event_name);

			else

				module:log("error", "Invalid route in %s: %q", app_name, key);

	local function http_app_removed(event)

		local app_handlers = apps[event.item.name];

		apps[event.item.name] = nil;

		for event, handler in pairs(app_handlers) do

			server.remove_handler(event, handler);

		end

	module:handle_items("http-provider", http_app_added, http_app_removed);

	listener = server.listener;

	listener = server.listener;

	default_port = 5281;