local Luan = require "luan:Luan.luan"
local error = Luan.error
local set_metatable = Luan.set_metatable or error()
local try = Luan.try or error()
local Package = require "luan:Package.luan"
local Io = require "luan:Io.luan"
local String = require "luan:String.luan"
local matches = String.matches or error()
local Http = require "luan:http/Http.luan"


local M = {}

M.welcome_file = "index.html"
M.cookie = {}

function M.get_page(path)
	Http.request.path = path
	if M.welcome_file ~= nil and matches(path,"/$") then
		path = path .. M.welcome_file
	end
	local old_out = Io.stdout
	try {
		function()
			local mod = Package.load("site:"..path..".luan")
			if mod ~= nil then
				mod()
			else
				local not_found = Package.load("site:/not_found.luan")
				not_found or error(path.." not found")
				not_found()
			end
			M.text_writer.close()
		end
		finally = function()
			Io.stdout = old_out
		end
	}
	return M.result.read_text()
end

function M.init()
	Http.request = Http.new_request{}
	Http.request.cookie = M.cookie

	Http.response = Http.new_response{

		text_writer = function()
			Http.sent_headers(Http.response.headers)
			M.result = Io.uri "string:"
			M.text_writer = M.result.text_writer()
			return M.text_writer
		end

		set_cookie = function(name,value)
			M.cookie[name] = value
		end

		remove_cookie = function(name)
			M.cookie[name] = nil
		end

		send_redirect = function(url)
			Http.response.redirect = url
		end

		send_error = function(code)
			error("sent error "..code)
		end

	}

end

return M