local computer = computer or require("computer")
local event = event or require("event")

local modem = component.proxy(component.list("modem")())

local function unknown()
    -- do nothing
end

local http = {}
local http.handlers = setmetatable({}, { __index = function() return unknown end })

local function http.example()
    http.handlers["/example"] = function (...)
        -- "modem_message", local addr, remote addr, port, distance, "/example"
        tmp = {...}

        modem.send(tmp[3], tmp[4], "hello world")
    end
end

local function http.listen(port) 
    modem.open(port)

    eventID = event.listen("modem_message", function (_, ...)
        -- event type, local addr, remote addr, port, distance, msg
        tmp = {...}

        -- Filter out messages coming from the wrong port
        if tmp[3] ~= port then return end

        -- Forward message to the correct handler
        http.handlers[tmp[5]](tmp)
    end)

    return eventID
end