--
-- Configuration GUI
--

local comms       = require("scada-common.comms")
local log         = require("scada-common.log")
local network     = require("scada-common.network")
local ppm         = require("scada-common.ppm")
local tcd         = require("scada-common.tcd")
local util        = require("scada-common.util")

local core        = require("graphics.core")

local DisplayBox  = require("graphics.elements.displaybox")
local Div         = require("graphics.elements.div")
local ListBox     = require("graphics.elements.listbox")
local MultiPane   = require("graphics.elements.multipane")
local TextBox     = require("graphics.elements.textbox")

local CheckBox    = require("graphics.elements.controls.checkbox")
local PushButton  = require("graphics.elements.controls.push_button")
local Radio2D     = require("graphics.elements.controls.radio_2d")
local RadioButton = require("graphics.elements.controls.radio_button")

local NumberField = require("graphics.elements.form.number_field")
local TextField   = require("graphics.elements.form.text_field")

local println = util.println
local tri = util.trinary

local PROTOCOL = comms.PROTOCOL
local DEVICE_TYPE = comms.DEVICE_TYPE
local ESTABLISH_ACK = comms.ESTABLISH_ACK
local MGMT_TYPE = comms.MGMT_TYPE

local cpair = core.cpair

local LEFT = core.ALIGN.LEFT
local CENTER = core.ALIGN.CENTER
local RIGHT = core.ALIGN.RIGHT

-- changes to the config data/format to let the user know
local changes = {}

---@class crd_configurator
local configurator = {}

local style = {}

style.root = cpair(colors.black, colors.lightGray)
style.header = cpair(colors.white, colors.gray)

style.colors = {
    { c = colors.red,       hex = 0xdf4949 },
    { c = colors.orange,    hex = 0xffb659 },
    { c = colors.yellow,    hex = 0xfffc79 },
    { c = colors.lime,      hex = 0x80ff80 },
    { c = colors.green,     hex = 0x4aee8a },
    { c = colors.cyan,      hex = 0x34bac8 },
    { c = colors.lightBlue, hex = 0x6cc0f2 },
    { c = colors.blue,      hex = 0x0096ff },
    { c = colors.purple,    hex = 0xb156ee },
    { c = colors.pink,      hex = 0xf26ba2 },
    { c = colors.magenta,   hex = 0xf9488a },
    { c = colors.lightGray, hex = 0xcacaca },
    { c = colors.gray,      hex = 0x575757 }
}

local bw_fg_bg = cpair(colors.black, colors.white)
local g_lg_fg_bg = cpair(colors.gray, colors.lightGray)
local nav_fg_bg = bw_fg_bg
local btn_act_fg_bg = cpair(colors.white, colors.gray)

local tool_ctl = {
    nic = nil,              ---@type nic
    net_listen = false,
    sv_addr = comms.BROADCAST,
    sv_seq_num = 0,
    sv_fac_conf = nil,      ---@type facility_conf

    ask_config = false,
    has_config = false,
    viewing_config = false,
    importing_legacy = false,

    view_cfg = nil,         ---@type graphics_element
    settings_apply = nil,   ---@type graphics_element

    gen_summary = nil,      ---@type function
    show_current_cfg = nil, ---@type function
    load_legacy = nil,      ---@type function

    show_auth_key = nil,    ---@type function
    show_key_btn = nil,     ---@type graphics_element
    auth_key_textbox = nil, ---@type graphics_element
    auth_key_value = "",

    sv_connect = nil,       ---@type function
    sv_conn_button = nil,   ---@type graphics_element
    sv_conn_status = nil,   ---@type graphics_element
    sv_conn_detail = nil,   ---@type graphics_element
    sv_skip = nil,          ---@type graphics_element
    sv_next = nil,          ---@type graphics_element

    cooling_elems = {},
    tank_elems = {},

    vis_ftanks = {},
    vis_utanks = {}
}

---@class crd_config
local tmp_cfg = {
    UnitCount = 1,
    SpeakerVolume = 1.0,
    Time24Hour = true,
    DisableFlowView = false,
    Displays = {},
    SVR_Channel = nil,  ---@type integer
    CRD_Channel = nil,  ---@type integer
    PKT_Channel = nil,  ---@type integer
    SVR_Timeout = nil,  ---@type number
    API_Timeout = nil,  ---@type number
    TrustedRange = nil, ---@type number
    AuthKey = nil,      ---@type string|nil
    LogMode = 0,
    LogPath = "",
    LogDebug = false,
}

---@class crd_config
local ini_cfg = {}
---@class crd_config
local settings_cfg = {}

-- all settings fields, their nice names, and their default values
local fields = {
    { "UnitCount", "Number of Reactors", 1 },
    { "SpeakerVolume", "Speaker Volume", 1.0 },
    { "Use24HourTime", "Use 24-hour Time Format", true },
    { "DisableFlowView", "Don't Use Flow", {} },
    { "SVR_Channel", "SVR Channel", 16240 },
    { "CRD_Channel", "CRD Channel", 16243 },
    { "PKT_Channel", "PKT Channel", 16244 },
    { "CRD_Timeout", "CRD Connection Timeout", 5 },
    { "API_Timeout", "API Connection Timeout", 5 },
    { "TrustedRange", "Trusted Range", 0 },
    { "AuthKey", "Facility Auth Key" , ""},
    { "LogMode", "Log Mode", log.MODE.APPEND },
    { "LogPath", "Log Path", "/log.txt" },
    { "LogDebug","Log Debug Messages", false }
}

-- send an management packet to the supervisor
---@param msg_type MGMT_TYPE
---@param msg table
local function send_sv(msg_type, msg)
    local s_pkt = comms.scada_packet()
    local pkt = comms.mgmt_packet()

    pkt.make(msg_type, msg)
    s_pkt.make(tool_ctl.sv_addr, tool_ctl.sv_seq_num, PROTOCOL.SCADA_MGMT, pkt.raw_sendable())

    tool_ctl.nic.transmit(tmp_cfg.SVR_Channel, tmp_cfg.CRD_Channel, s_pkt)
    tool_ctl.sv_seq_num = tool_ctl.sv_seq_num + 1
end

-- handle an establish message from the supervisor
---@param packet mgmt_frame
local function handle_packet(packet)
    local error_msg = nil

    if packet.scada_frame.local_channel() ~= tmp_cfg.CRD_Channel then
        error_msg = "Error: unknown receive channel."
    elseif packet.scada_frame.remote_channel() == tmp_cfg.SVR_Channel and packet.scada_frame.protocol() == PROTOCOL.SCADA_MGMT then
        if packet.type == MGMT_TYPE.ESTABLISH then
            -- connection with supervisor established
            if packet.length == 2 then
                local est_ack = packet.data[1]
                local config = packet.data[2]

                if est_ack == ESTABLISH_ACK.ALLOW then
                    if type(config) == "table" and #config == 2 then
                        tool_ctl.sv_fac_conf = { num_units = config[1], cooling = config[2] }
                        tool_ctl.sv_addr = packet.scada_frame.src_addr()
                        send_sv(MGMT_TYPE.CLOSE, {})
                    else
                        error_msg = "Error: invalid cooling configuration supervisor."
                    end
                else
                    error_msg = "Error: invalid allow reply length from supervisor."
                end
            elseif packet.length == 1 then
                local est_ack = packet.data[1]

                if est_ack == ESTABLISH_ACK.DENY then
                    error_msg = "Error: supervisor connection denied."
                elseif est_ack == ESTABLISH_ACK.COLLISION then
                    error_msg = "Error: a coordinator is already/still connected. Please try again."
                elseif est_ack == ESTABLISH_ACK.BAD_VERSION then
                    error_msg = "Error: coordinator comms version does not match supervisor comms version."
                else
                    error_msg = "Error: invalid reply from supervisor."
                end
            else
                error_msg = "Error: invalid reply length from supervisor."
            end
        else
            error_msg = "Error: didn't get an establish reply from supervisor."
        end
    end

    tool_ctl.net_listen = false

    if error_msg then
        tool_ctl.sv_conn_status.set_value("")
        tool_ctl.sv_conn_detail.set_value(error_msg)
        tool_ctl.sv_conn_button.enable()
    else
        tool_ctl.sv_conn_status.set_value("Connected!")
        tool_ctl.sv_conn_detail.set_value("Data received successfully, press 'Next' to continue.")
        tool_ctl.sv_skip.hide()
        tool_ctl.sv_next.show()
    end
end

-- handle supervisor connection failure
local function handle_timeout()
    tool_ctl.net_listen = false
    tool_ctl.sv_conn_button.enable()
    tool_ctl.sv_conn_status.set_value("Timed out.")
    tool_ctl.sv_conn_detail.set_value("Supervisor did not reply. Ensure startup app is running on the supervisor.")
end

-- load data from the settings file
---@param target crd_config
---@param raw boolean? true to not use default values
local function load_settings(target, raw)
    for _, v in pairs(fields) do settings.unset(v[1]) end

    local loaded = settings.load("/coordinator.settings")

    for _, v in pairs(fields) do target[v[1]] = settings.get(v[1], tri(raw, nil, v[3])) end

    return loaded
end

-- create the config view
---@param display graphics_element
local function config_view(display)
---@diagnostic disable-next-line: undefined-field
    local function exit() os.queueEvent("terminate") end

    TextBox{parent=display,y=1,text="Coordinator Configurator",alignment=CENTER,height=1,fg_bg=style.header}

    local root_pane_div = Div{parent=display,x=1,y=2}

    local main_page = Div{parent=root_pane_div,x=1,y=1}
    local net_cfg = Div{parent=root_pane_div,x=1,y=1}
    local fac_cfg = Div{parent=root_pane_div,x=1,y=1}
    local mon_cfg = Div{parent=root_pane_div,x=1,y=1}
    local crd_cfg = Div{parent=root_pane_div,x=1,y=1}
    local log_cfg = Div{parent=root_pane_div,x=1,y=1}
    local summary = Div{parent=root_pane_div,x=1,y=1}
    local changelog = Div{parent=root_pane_div,x=1,y=1}
    local import_err = Div{parent=root_pane_div,x=1,y=1}

    local main_pane = MultiPane{parent=root_pane_div,x=1,y=1,panes={main_page,net_cfg,fac_cfg,mon_cfg,crd_cfg,log_cfg,summary,changelog,import_err}}

    -- MAIN PAGE

    local y_start = 5

    TextBox{parent=main_page,x=2,y=2,height=2,text="Welcome to the Coordinator configurator! Please select one of the following options."}

    if tool_ctl.ask_config then
        TextBox{parent=main_page,x=2,y=y_start,height=4,width=49,text="Notice: This device has no valid config so the configurator has been automatically started. If you previously had a valid config, you may want to check the Change Log to see what changed.",fg_bg=cpair(colors.red,colors.lightGray)}
        y_start = y_start + 5
    end

    local function view_config()
        tool_ctl.viewing_config = true
        tool_ctl.gen_summary(settings_cfg)
        tool_ctl.settings_apply.hide(true)
        main_pane.set_value(5)
    end

    if fs.exists("/supervisor/config.lua") then
        PushButton{parent=main_page,x=2,y=y_start,min_width=28,text="Import Legacy 'config.lua'",callback=function()tool_ctl.load_legacy()end,fg_bg=cpair(colors.black,colors.cyan),active_fg_bg=btn_act_fg_bg}
        y_start = y_start + 2
    end

    PushButton{parent=main_page,x=2,y=y_start,min_width=18,text="Configure System",callback=function()main_pane.set_value(2)end,fg_bg=cpair(colors.black,colors.blue),active_fg_bg=btn_act_fg_bg}
    tool_ctl.view_cfg = PushButton{parent=main_page,x=2,y=y_start+2,min_width=20,text="View Configuration",callback=view_config,fg_bg=cpair(colors.black,colors.blue),active_fg_bg=btn_act_fg_bg,dis_fg_bg=cpair(colors.lightGray,colors.white)}

    if not tool_ctl.has_config then tool_ctl.view_cfg.disable() end

    PushButton{parent=main_page,x=2,y=17,min_width=6,text="Exit",callback=exit,fg_bg=cpair(colors.black,colors.red),active_fg_bg=btn_act_fg_bg}
    PushButton{parent=main_page,x=39,y=17,min_width=12,text="Change Log",callback=function()main_pane.set_value(6)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    --#region NET CONFIG

    local net_c_1 = Div{parent=net_cfg,x=2,y=4,width=49}
    local net_c_2 = Div{parent=net_cfg,x=2,y=4,width=49}
    local net_c_3 = Div{parent=net_cfg,x=2,y=4,width=49}
    local net_c_4 = Div{parent=net_cfg,x=2,y=4,width=49}

    local net_pane = MultiPane{parent=net_cfg,x=1,y=4,panes={net_c_1,net_c_2,net_c_3,net_c_4}}

    TextBox{parent=net_cfg,x=1,y=2,height=1,text=" Network Configuration",fg_bg=cpair(colors.black,colors.lightBlue)}

    TextBox{parent=net_c_1,x=1,y=1,height=1,text="Please set the network channels below."}
    TextBox{parent=net_c_1,x=1,y=3,height=4,text="Each of the 5 uniquely named channels, including the 3 below, must be the same for each device in this SCADA network. For multiplayer servers, it is recommended to not use the default channels.",fg_bg=g_lg_fg_bg}

    TextBox{parent=net_c_1,x=1,y=8,height=1,width=18,text="Supervisor Channel"}
    local svr_chan = NumberField{parent=net_c_1,x=21,y=8,width=7,default=ini_cfg.SVR_Channel,min=1,max=65535,fg_bg=bw_fg_bg}
    TextBox{parent=net_c_1,x=29,y=8,height=4,text="[SVR_CHANNEL]",fg_bg=g_lg_fg_bg}

    TextBox{parent=net_c_1,x=1,y=10,height=1,width=19,text="Coordinator Channel"}
    local crd_chan = NumberField{parent=net_c_1,x=21,y=10,width=7,default=ini_cfg.CRD_Channel,min=1,max=65535,fg_bg=bw_fg_bg}
    TextBox{parent=net_c_1,x=29,y=10,height=4,text="[CRD_CHANNEL]",fg_bg=g_lg_fg_bg}

    TextBox{parent=net_c_1,x=1,y=12,height=1,width=14,text="Pocket Channel"}
    local pkt_chan = NumberField{parent=net_c_1,x=21,y=12,width=7,default=ini_cfg.PKT_Channel,min=1,max=65535,fg_bg=bw_fg_bg}
    TextBox{parent=net_c_1,x=29,y=12,height=4,text="[PKT_CHANNEL]",fg_bg=g_lg_fg_bg}

    local chan_err = TextBox{parent=net_c_1,x=8,y=14,height=1,width=35,text="Please set all channels.",fg_bg=cpair(colors.red,colors.lightGray),hidden=true}

    local function submit_channels()
        local svr_c, crd_c, pkt_c = tonumber(svr_chan.get_value()), tonumber(crd_chan.get_value()), tonumber(pkt_chan.get_value())
        if svr_c ~= nil and crd_c ~= nil and pkt_c ~= nil then
            tmp_cfg.SVR_Channel, tmp_cfg.CRD_Channel, tmp_cfg.PKT_Channel = svr_c, crd_c, pkt_c
            net_pane.set_value(2)
            chan_err.hide(true)
        else chan_err.show() end
    end

    PushButton{parent=net_c_1,x=1,y=14,text="\x1b Back",callback=function()main_pane.set_value(1)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=net_c_1,x=44,y=14,text="Next \x1a",callback=submit_channels,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    TextBox{parent=net_c_2,x=1,y=1,height=1,text="Please set the connection timeouts below."}
    TextBox{parent=net_c_2,x=1,y=3,height=4,text="You generally should not need to modify these. On slow servers, you can try to increase this to make the system wait longer before assuming a disconnection. The default for all is 5 seconds.",fg_bg=g_lg_fg_bg}

    TextBox{parent=net_c_2,x=1,y=8,height=1,width=19,text="Supervisor Timeout"}
    local svr_timeout = NumberField{parent=net_c_2,x=20,y=8,width=7,default=ini_cfg.SVR_Timeout,min=2,max=25,max_chars=6,max_frac_digits=2,allow_decimal=true,fg_bg=bw_fg_bg}

    TextBox{parent=net_c_2,x=1,y=10,height=1,width=14,text="Pocket Timeout"}
    local pkt_timeout = NumberField{parent=net_c_2,x=20,y=10,width=7,default=ini_cfg.PKT_Timeout,min=2,max=25,max_chars=6,max_frac_digits=2,allow_decimal=true,fg_bg=bw_fg_bg}

    TextBox{parent=net_c_2,x=28,y=8,height=4,width=7,text="seconds\n\nseconds",fg_bg=g_lg_fg_bg}

    local ct_err = TextBox{parent=net_c_2,x=8,y=14,height=1,width=35,text="Please set all connection timeouts.",fg_bg=cpair(colors.red,colors.lightGray),hidden=true}

    local function submit_timeouts()
        local svr_cto, pkt_cto = tonumber(svr_timeout.get_value()), tonumber(pkt_timeout.get_value())
        if svr_cto ~= nil and pkt_cto ~= nil then
            tmp_cfg.SVR_Timeout, tmp_cfg.PKT_Timeout = svr_cto, pkt_cto
            net_pane.set_value(3)
            ct_err.hide(true)
        else ct_err.show() end
    end

    PushButton{parent=net_c_2,x=1,y=14,text="\x1b Back",callback=function()net_pane.set_value(1)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=net_c_2,x=44,y=14,text="Next \x1a",callback=submit_timeouts,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    TextBox{parent=net_c_3,x=1,y=1,height=1,text="Please set the trusted range below."}
    TextBox{parent=net_c_3,x=1,y=3,height=3,text="Setting this to a value larger than 0 prevents connections with devices that many meters (blocks) away in any direction.",fg_bg=g_lg_fg_bg}
    TextBox{parent=net_c_3,x=1,y=7,height=2,text="This is optional. You can disable this functionality by setting the value to 0.",fg_bg=g_lg_fg_bg}

    local range = NumberField{parent=net_c_3,x=1,y=10,width=10,default=ini_cfg.TrustedRange,min=0,max_chars=20,allow_decimal=true,fg_bg=bw_fg_bg}

    local tr_err = TextBox{parent=net_c_3,x=8,y=14,height=1,width=35,text="Please set the trusted range.",fg_bg=cpair(colors.red,colors.lightGray),hidden=true}

    local function submit_tr()
        local range_val = tonumber(range.get_value())
        if range_val ~= nil then
            tmp_cfg.TrustedRange = range_val
            comms.set_trusted_range(range_val)
            net_pane.set_value(4)
            tr_err.hide(true)
        else tr_err.show() end
    end

    PushButton{parent=net_c_3,x=1,y=14,text="\x1b Back",callback=function()net_pane.set_value(2)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=net_c_3,x=44,y=14,text="Next \x1a",callback=submit_tr,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    TextBox{parent=net_c_4,x=1,y=1,height=2,text="Optionally, set the facility authentication key below. Do NOT use one of your passwords."}
    TextBox{parent=net_c_4,x=1,y=4,height=6,text="This enables verifying that messages are authentic, so it is intended for security on multiplayer servers. All devices on the same network MUST use the same key if any device has a key. This does result in some extra compution (can slow things down).",fg_bg=g_lg_fg_bg}

    TextBox{parent=net_c_4,x=1,y=11,height=1,text="Facility Auth Key"}
    local key, _, censor = TextField{parent=net_c_4,x=1,y=12,max_len=64,value=ini_cfg.AuthKey,width=32,height=1,fg_bg=bw_fg_bg}

    local function censor_key(enable) censor(util.trinary(enable, "*", nil)) end

    local hide_key = CheckBox{parent=net_c_4,x=34,y=12,label="Hide",box_fg_bg=cpair(colors.lightBlue,colors.black),callback=censor_key}

    hide_key.set_value(true)
    censor_key(true)

    local key_err = TextBox{parent=net_c_4,x=8,y=14,height=1,width=35,text="Key must be at least 8 characters.",fg_bg=cpair(colors.red,colors.lightGray),hidden=true}

    local function submit_auth()
        local v = key.get_value()
        if string.len(v) == 0 or string.len(v) >= 8 then
            tmp_cfg.AuthKey = key.get_value()
            main_pane.set_value(3)
            key_err.hide(true)

            -- init mac for supervisor connection
            if string.len(v) >= 8 then network.init_mac(tmp_cfg.AuthKey) end

            -- prep supervisor connection screen
            tool_ctl.sv_conn_button.enable()
            tool_ctl.sv_conn_status.set_value("")
            tool_ctl.sv_conn_detail.set_value("")
            tool_ctl.sv_next.hide()
            tool_ctl.sv_skip.show()
        else key_err.show() end
    end

    PushButton{parent=net_c_4,x=1,y=14,text="\x1b Back",callback=function()net_pane.set_value(3)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=net_c_4,x=44,y=14,text="Next \x1a",callback=submit_auth,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    --#endregion

    -- FACILITY CONFIG

    local fac_c_1 = Div{parent=fac_cfg,x=2,y=4,width=49}
    local fac_c_2 = Div{parent=fac_cfg,x=2,y=4,width=49}

    local fac_pane = MultiPane{parent=mon_cfg,x=1,y=4,panes={fac_c_1,fac_c_2}}

    TextBox{parent=fac_cfg,x=1,y=2,height=1,text=" Facility Configuration",fg_bg=cpair(colors.black,colors.yellow)}

    TextBox{parent=fac_c_1,x=1,y=1,height=4,text="This tool can attempt to connect to your supervisor computer. This would load facility information in order to get the unit count and aid monitor setup."}
    TextBox{parent=fac_c_1,x=1,y=6,height=2,text="The supervisor startup app must be running and fully configured on your supervisor computer."}

    tool_ctl.sv_conn_status = TextBox{parent=fac_c_1,x=11,y=9,height=1,text=""}
    tool_ctl.sv_conn_detail = TextBox{parent=fac_c_1,x=1,y=11,height=2,text=""}

    tool_ctl.sv_conn_button = PushButton{parent=fac_c_1,x=1,y=9,text="Connect",min_width=9,callback=function()tool_ctl.sv_connect()end,fg_bg=cpair(colors.black,colors.green),active_fg_bg=btn_act_fg_bg,dis_fg_bg=cpair(colors.lightGray,colors.white)}

    function tool_ctl.sv_connect()
        tool_ctl.sv_conn_button.disable()
        tool_ctl.sv_conn_detail.set_value("")

        local modem = ppm.get_wireless_modem()
        if modem == nil then
            tool_ctl.sv_conn_status.set_value("Please connect an ender/wireless modem.")
        else
            tool_ctl.sv_conn_status.set_value("Modem found, connecting...")
            if tool_ctl.nic == nil then tool_ctl.nic = network.nic(modem) end

            tool_ctl.nic.closeAll()
            tool_ctl.nic.open(tmp_cfg.CRD_Channel)

            tool_ctl.sv_addr = comms.BROADCAST
            tool_ctl.sv_seq_num = 0
            tool_ctl.net_listen = true

            send_sv(MGMT_TYPE.ESTABLISH, { comms.version, "0.0.0", DEVICE_TYPE.CRD })

            tcd.dispatch_unique(8, handle_timeout)
        end
    end

    PushButton{parent=fac_c_1,x=1,y=14,text="\x1b Back",callback=function()main_pane.set_value(2)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    tool_ctl.sv_skip = PushButton{parent=fac_c_1,x=44,y=14,text="Skip \x1a",callback=function()fac_pane.set_value(3)end,fg_bg=cpair(colors.black,colors.red),active_fg_bg=btn_act_fg_bg}
    tool_ctl.sv_next = PushButton{parent=fac_c_1,x=44,y=14,text="Next \x1a",callback=function()fac_pane.set_value(4)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg,hidden=true}

    TextBox{parent=fac_c_2,x=1,y=1,height=3,text="Please enter the number of reactors you have, also referred to as reactor units or 'units' for short. A maximum of 4 is currently supported."}
    local num_units = NumberField{parent=fac_c_2,x=1,y=5,width=5,max_chars=2,default=ini_cfg.UnitCount,min=1,max=4,fg_bg=bw_fg_bg}
    TextBox{parent=fac_c_2,x=7,y=5,height=1,text="reactors"}
    TextBox{parent=fac_c_2,x=1,y=7,height=3,text="This will decide how many monitors you need. If this does not match the supervisor's number of reactor units, the coordinator will not connect.",fg_bg=g_lg_fg_bg}

    local nu_error = TextBox{parent=fac_c_2,x=8,y=14,height=1,width=35,text="Please set the number of reactors.",fg_bg=cpair(colors.red,colors.lightGray),hidden=true}

    local function submit_num_units()
        local count = tonumber(num_units.get_value())
        if count ~= nil and count > 0 and count < 5 then
            nu_error.hide(true)
            tmp_cfg.UnitCount = count
            main_pane.set_value(3)
        else nu_error.show() end
    end

    PushButton{parent=fac_c_2,x=1,y=14,text="\x1b Back",callback=function()fac_pane.set_value(1)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=fac_c_2,x=44,y=14,text="Next \x1a",callback=submit_num_units,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    -- MONITOR CONFIG

    local mon_c_1 = Div{parent=mon_cfg,x=2,y=4,width=49}

    local mon_pane = MultiPane{parent=mon_cfg,x=1,y=4,panes={mon_c_1}}

    TextBox{parent=mon_cfg,x=1,y=2,height=1,text=" Monitor Configuration",fg_bg=cpair(colors.black,colors.lime)}

    TextBox{parent=mon_c_1,x=1,y=1,height=3,text="Your configuration requires the following monitors:"}

    local nu_error = TextBox{parent=mon_c_1,x=8,y=14,height=1,width=35,text="Please set the number of reactors.",fg_bg=cpair(colors.red,colors.lightGray),hidden=true}

    local function submit_num_units()
        -- local count = tonumber(num_units.get_value())
        -- if count ~= nil and count > 0 and count < 5 then
        --     nu_error.hide(true)
        --     tmp_cfg.UnitCount = count

        --     local confs = tool_ctl.cooling_elems
        --     if count >= 2 then confs[2].line.show() else confs[2].line.hide(true) end
        --     if count >= 3 then confs[3].line.show() else confs[3].line.hide(true) end
        --     if count == 4 then confs[4].line.show() else confs[4].line.hide(true) end

        --     crd_pane.set_value(2)
        -- else nu_error.show() end
    end

    PushButton{parent=mon_c_1,x=1,y=14,text="\x1b Back",callback=function()main_pane.set_value(1)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=mon_c_1,x=44,y=14,text="Next \x1a",callback=submit_num_units,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    -- COORDINATOR CONFIG

    local crd_c_1 = Div{parent=crd_cfg,x=2,y=4,width=49}
    local crd_c_2 = Div{parent=crd_cfg,x=2,y=4,width=49}
    local crd_c_3 = Div{parent=crd_cfg,x=2,y=4,width=49}
    local crd_c_4 = Div{parent=crd_cfg,x=2,y=4,width=49}
    local crd_c_5 = Div{parent=crd_cfg,x=2,y=4,width=49}
    local crd_c_6 = Div{parent=crd_cfg,x=2,y=4,width=49}

    local crd_pane = MultiPane{parent=crd_cfg,x=1,y=4,panes={crd_c_1}}

    TextBox{parent=crd_cfg,x=1,y=2,height=1,text=" Coordinator Configuration",fg_bg=cpair(colors.black,colors.lime)}

    TextBox{parent=crd_c_1,x=1,y=1,height=3,text="Please enter the number of reactors you have, also referred to as reactor units or 'units' for short. A maximum of 4 is currently supported."}
    local num_units = NumberField{parent=crd_c_1,x=1,y=5,width=5,max_chars=2,default=ini_cfg.UnitCount,min=1,max=4,fg_bg=bw_fg_bg}
    TextBox{parent=crd_c_1,x=7,y=5,height=1,text="reactors"}
    TextBox{parent=crd_c_1,x=1,y=7,height=3,text="This will decide how many monitors you need. If this does not match the supervisor's number of reactor units, the coordinator will not connect.",fg_bg=g_lg_fg_bg}

    local nu_error = TextBox{parent=crd_c_1,x=8,y=14,height=1,width=35,text="Please set the number of reactors.",fg_bg=cpair(colors.red,colors.lightGray),hidden=true}

    local function submit_num_units()
        local count = tonumber(num_units.get_value())
        if count ~= nil and count > 0 and count < 5 then
            nu_error.hide(true)
            tmp_cfg.UnitCount = count

            local confs = tool_ctl.cooling_elems
            if count >= 2 then confs[2].line.show() else confs[2].line.hide(true) end
            if count >= 3 then confs[3].line.show() else confs[3].line.hide(true) end
            if count == 4 then confs[4].line.show() else confs[4].line.hide(true) end

            crd_pane.set_value(2)
        else nu_error.show() end
    end

    PushButton{parent=crd_c_1,x=1,y=14,text="\x1b Back",callback=function()main_pane.set_value(1)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=crd_c_1,x=44,y=14,text="Next \x1a",callback=submit_num_units,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    -- LOG CONFIG

    local log_c_1 = Div{parent=log_cfg,x=2,y=4,width=49}

    TextBox{parent=log_cfg,x=1,y=2,height=1,text=" Logging Configuration",fg_bg=cpair(colors.black,colors.pink)}

    TextBox{parent=log_c_1,x=1,y=1,height=1,text="Please configure logging below."}

    TextBox{parent=log_c_1,x=1,y=3,height=1,text="Log File Mode"}
    local mode = RadioButton{parent=log_c_1,x=1,y=4,default=ini_cfg.LogMode+1,options={"Append on Startup","Replace on Startup"},callback=function()end,radio_colors=cpair(colors.lightGray,colors.black),select_color=colors.pink}

    TextBox{parent=log_c_1,x=1,y=7,height=1,text="Log File Path"}
    local path = TextField{parent=log_c_1,x=1,y=8,width=49,height=1,value=ini_cfg.LogPath,max_len=128,fg_bg=bw_fg_bg}

    local en_dbg = CheckBox{parent=log_c_1,x=1,y=10,default=ini_cfg.LogDebug,label="Enable Logging Debug Messages",box_fg_bg=cpair(colors.pink,colors.black)}
    TextBox{parent=log_c_1,x=3,y=11,height=2,text="This results in much larger log files. It is best to only use this when there is a problem.",fg_bg=g_lg_fg_bg}

    local path_err = TextBox{parent=log_c_1,x=8,y=14,height=1,width=35,text="Please provide a log file path.",fg_bg=cpair(colors.red,colors.lightGray),hidden=true}

    local function submit_log()
        if path.get_value() ~= "" then
            path_err.hide(true)
            tmp_cfg.LogMode = mode.get_value() - 1
            tmp_cfg.LogPath = path.get_value()
            tmp_cfg.LogDebug = en_dbg.get_value()
            tool_ctl.gen_summary(tmp_cfg)
            tool_ctl.viewing_config = false
            tool_ctl.importing_legacy = false
            tool_ctl.settings_apply.show()
            main_pane.set_value(5)
        else path_err.show() end
    end

    PushButton{parent=log_c_1,x=1,y=14,text="\x1b Back",callback=function()main_pane.set_value(3)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=log_c_1,x=44,y=14,text="Next \x1a",callback=submit_log,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    -- SUMMARY OF CHANGES

    local sum_c_1 = Div{parent=summary,x=2,y=4,width=49}
    local sum_c_2 = Div{parent=summary,x=2,y=4,width=49}
    local sum_c_3 = Div{parent=summary,x=2,y=4,width=49}
    local sum_c_4 = Div{parent=summary,x=2,y=4,width=49}

    local sum_pane = MultiPane{parent=summary,x=1,y=4,panes={sum_c_1,sum_c_2,sum_c_3,sum_c_4}}

    TextBox{parent=summary,x=1,y=2,height=1,text=" Summary",fg_bg=cpair(colors.black,colors.green)}

    local setting_list = ListBox{parent=sum_c_1,x=1,y=1,height=12,width=51,scroll_height=100,fg_bg=bw_fg_bg,nav_fg_bg=g_lg_fg_bg,nav_active=cpair(colors.black,colors.gray)}

    local function back_from_settings()
        if tool_ctl.viewing_config or tool_ctl.importing_legacy then
            main_pane.set_value(1)
            tool_ctl.viewing_config = false
            tool_ctl.importing_legacy = false
            tool_ctl.settings_apply.show()
        else
            main_pane.set_value(4)
        end
    end

    ---@param element graphics_element
    ---@param data any
    local function try_set(element, data)
        if data ~= nil then element.set_value(data) end
    end

    local function save_and_continue()
        for k, v in pairs(tmp_cfg) do settings.set(k, v) end

        if settings.save("supervisor.settings") then
            load_settings(settings_cfg, true)
            load_settings(ini_cfg)

            try_set(num_units, ini_cfg.UnitCount)
            try_set(tank_mode, ini_cfg.FacilityTankMode)
            try_set(svr_chan, ini_cfg.SVR_Channel)
            try_set(plc_chan, ini_cfg.PLC_Channel)
            try_set(rtu_chan, ini_cfg.RTU_Channel)
            try_set(crd_chan, ini_cfg.CRD_Channel)
            try_set(pkt_chan, ini_cfg.PKT_Channel)
            try_set(plc_timeout, ini_cfg.PLC_Timeout)
            try_set(rtu_timeout, ini_cfg.RTU_Timeout)
            try_set(crd_timeout, ini_cfg.CRD_Timeout)
            try_set(pkt_timeout, ini_cfg.PKT_Timeout)
            try_set(range, ini_cfg.TrustedRange)
            try_set(key, ini_cfg.AuthKey)
            try_set(mode, ini_cfg.LogMode)
            try_set(path, ini_cfg.LogPath)
            try_set(en_dbg, ini_cfg.LogDebug)

            for i = 1, #ini_cfg.CoolingConfig do
                local cfg, elems = ini_cfg.CoolingConfig[i], tool_ctl.cooling_elems[i]
                try_set(elems.boilers, cfg.BoilerCount)
                try_set(elems.turbines, cfg.TurbineCount)
                try_set(elems.tank, cfg.TankConnection)
            end

            for i = 1, #ini_cfg.FacilityTankDefs do
                try_set(tool_ctl.tank_elems[i].tank_opt, ini_cfg.FacilityTankDefs[i])
            end

            en_fac_tanks.set_value(ini_cfg.FacilityTankMode > 0)

            tool_ctl.view_cfg.enable()

            if tool_ctl.importing_legacy then
                tool_ctl.importing_legacy = false
                sum_pane.set_value(3)
            else
                sum_pane.set_value(2)
            end
        else
            sum_pane.set_value(4)
        end
    end

    PushButton{parent=sum_c_1,x=1,y=14,text="\x1b Back",callback=back_from_settings,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    tool_ctl.show_key_btn = PushButton{parent=sum_c_1,x=8,y=14,min_width=17,text="Unhide Auth Key",callback=function()tool_ctl.show_auth_key()end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg,dis_fg_bg=cpair(colors.lightGray,colors.white)}
    tool_ctl.settings_apply = PushButton{parent=sum_c_1,x=43,y=14,min_width=7,text="Apply",callback=save_and_continue,fg_bg=cpair(colors.black,colors.green),active_fg_bg=btn_act_fg_bg}

    TextBox{parent=sum_c_2,x=1,y=1,height=1,text="Settings saved!"}

    local function go_home()
        main_pane.set_value(1)
        svr_pane.set_value(1)
        net_pane.set_value(1)
        sum_pane.set_value(1)
    end

    PushButton{parent=sum_c_2,x=1,y=14,min_width=6,text="Home",callback=go_home,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=sum_c_2,x=44,y=14,min_width=6,text="Exit",callback=exit,fg_bg=cpair(colors.black,colors.red),active_fg_bg=cpair(colors.white,colors.gray)}

    TextBox{parent=sum_c_3,x=1,y=1,height=2,text="The old config.lua file will now be deleted, then the configurator will exit."}

    local function delete_legacy()
        fs.delete("/supervisor/config.lua")
        exit()
    end

    PushButton{parent=sum_c_3,x=1,y=14,min_width=8,text="Cancel",callback=go_home,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=sum_c_3,x=44,y=14,min_width=6,text="OK",callback=delete_legacy,fg_bg=cpair(colors.black,colors.green),active_fg_bg=cpair(colors.white,colors.gray)}

    TextBox{parent=sum_c_4,x=1,y=1,height=5,text="Failed to save the settings file.\n\nThere may not be enough space for the modification or server file permissions may be denying writes."}
    PushButton{parent=sum_c_4,x=1,y=14,min_width=6,text="Home",callback=go_home,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=sum_c_4,x=44,y=14,min_width=6,text="Exit",callback=exit,fg_bg=cpair(colors.black,colors.red),active_fg_bg=cpair(colors.white,colors.gray)}

    -- CONFIG CHANGE LOG

    local cl = Div{parent=changelog,x=2,y=4,width=49}

    TextBox{parent=changelog,x=1,y=2,height=1,text=" Config Change Log",fg_bg=bw_fg_bg}

    local c_log = ListBox{parent=cl,x=1,y=1,height=12,width=51,scroll_height=100,fg_bg=bw_fg_bg,nav_fg_bg=g_lg_fg_bg,nav_active=cpair(colors.black,colors.gray)}

    for _, change in ipairs(changes) do
        TextBox{parent=c_log,text=change[1],height=1,fg_bg=bw_fg_bg}
        for _, v in ipairs(change[2]) do
            local e = Div{parent=c_log,height=#util.strwrap(v,46)}
            TextBox{parent=e,y=1,x=1,text="- ",height=1,fg_bg=cpair(colors.gray,colors.white)}
            TextBox{parent=e,y=1,x=3,text=v,height=e.get_height(),fg_bg=cpair(colors.gray,colors.white)}
        end
    end

    PushButton{parent=cl,x=1,y=14,text="\x1b Back",callback=function()main_pane.set_value(1)end,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}

    -- IMPORT ERROR

    local i_err = Div{parent=import_err,x=2,y=4,width=49}

    TextBox{parent=import_err,x=1,y=2,height=1,text=" Import Error",fg_bg=cpair(colors.black,colors.red)}
    TextBox{parent=i_err,x=1,y=1,height=1,text="There is a problem with your config.lua file:"}

    local import_err_msg = TextBox{parent=i_err,x=1,y=3,height=6,text=""}

    PushButton{parent=i_err,x=1,y=14,min_width=6,text="Home",callback=go_home,fg_bg=nav_fg_bg,active_fg_bg=btn_act_fg_bg}
    PushButton{parent=i_err,x=44,y=14,min_width=6,text="Exit",callback=exit,fg_bg=cpair(colors.black,colors.red),active_fg_bg=cpair(colors.white,colors.gray)}

    -- set tool functions now that we have the elements

    -- load a legacy config file
    function tool_ctl.load_legacy()
        local config = require("supervisor.config")

        tmp_cfg.UnitCount = config.NUM_REACTORS

        if config.REACTOR_COOLING == nil or tmp_cfg.UnitCount ~= #config.REACTOR_COOLING then
            import_err_msg.set_value("Cooling configuration table length must match the number of units.")
            main_pane.set_value(7)
            return
        end

        for i = 1, tmp_cfg.UnitCount do
            local cfg = config.REACTOR_COOLING[i]

            if type(cfg) ~= "table" then
                import_err_msg.set_value("Cooling configuration for unit " .. i .. " must be a table.")
                main_pane.set_value(7)
                return
            end

            tmp_cfg.CoolingConfig[i] = { BoilerCount = cfg.BOILERS or 0, TurbineCount = cfg.TURBINES or 1, TankConnection = cfg.TANK or false }
        end

        tmp_cfg.FacilityTankMode = config.FAC_TANK_MODE

        if not (util.is_int(tmp_cfg.FacilityTankMode) and tmp_cfg.FacilityTankMode >= 0 and tmp_cfg.FacilityTankMode <= 8) then
            import_err_msg.set_value("Invalid tank mode present in config. FAC_TANK_MODE must be a number 0 through 8.")
            main_pane.set_value(7)
            return
        end

        if config.FAC_TANK_MODE > 0 then
            if config.FAC_TANK_DEFS == nil or tmp_cfg.UnitCount ~= #config.FAC_TANK_DEFS then
                import_err_msg.set_value("Facility tank definitions table length must match the number of units when using facility tanks.")
                main_pane.set_value(7)
                return
            end

            for i = 1, tmp_cfg.UnitCount do
                tmp_cfg.FacilityTankDefs[i] = config.FAC_TANK_DEFS[i]
            end
        else
            tmp_cfg.FacilityTankMode = 0
            tmp_cfg.FacilityTankDefs = {}
        end

        tmp_cfg.SVR_Channel = config.SVR_CHANNEL
        tmp_cfg.PLC_Channel = config.PLC_CHANNEL
        tmp_cfg.RTU_Channel = config.RTU_CHANNEL
        tmp_cfg.CRD_Channel = config.CRD_CHANNEL
        tmp_cfg.PKT_Channel = config.PKT_CHANNEL

        tmp_cfg.PLC_Timeout = config.PLC_TIMEOUT
        tmp_cfg.RTU_Timeout = config.RTU_TIMEOUT
        tmp_cfg.CRD_Timeout = config.CRD_TIMEOUT
        tmp_cfg.PKT_Timeout = config.PKT_TIMEOUT

        tmp_cfg.TrustedRange = config.TRUSTED_RANGE
        tmp_cfg.AuthKey = config.AUTH_KEY or ""
        tmp_cfg.LogMode = config.LOG_MODE
        tmp_cfg.LogPath = config.LOG_PATH
        tmp_cfg.LogDebug = config.LOG_DEBUG or false

        tool_ctl.gen_summary(tmp_cfg)
        sum_pane.set_value(1)
        main_pane.set_value(5)
        tool_ctl.importing_legacy = true
    end

    -- expose the auth key on the summary page
    function tool_ctl.show_auth_key()
        tool_ctl.show_key_btn.disable()
        tool_ctl.auth_key_textbox.set_value(tool_ctl.auth_key_value)
    end

    -- generate the summary list
    ---@param cfg svr_config
    function tool_ctl.gen_summary(cfg)
        setting_list.remove_all()

        local alternate = false
        local inner_width = setting_list.get_width() - 1

        tool_ctl.show_key_btn.enable()
        tool_ctl.auth_key_value = cfg.AuthKey or "" -- to show auth key

        for i = 1, #fields do
            local f = fields[i]
            local height = 1
            local label_w = string.len(f[2])
            local val_max_w = (inner_width - label_w) + 1
            local raw = cfg[f[1]]
            local val = util.strval(raw)

            if f[1] == "AuthKey" then val = string.rep("*", string.len(val))
            elseif f[1] == "LogMode" then val = util.trinary(raw == log.MODE.APPEND, "append", "replace")
            elseif f[1] == "CoolingConfig" and cfg.CoolingConfig then
                val = ""

                for idx = 1, #cfg.CoolingConfig do
                    local ccfg = cfg.CoolingConfig[idx]
                    local b_plural = util.trinary(ccfg.BoilerCount == 1, "", "s")
                    local t_plural = util.trinary(ccfg.TurbineCount == 1, "", "s")
                    local tank = util.trinary(ccfg.TankConnection, "has tank conn", "no tank conn")
                    val = val .. util.trinary(idx == 1, "", "\n") ..
                            util.sprintf(" \x07 unit %d - %d boiler%s, %d turbine%s, %s", idx, ccfg.BoilerCount, b_plural, ccfg.TurbineCount, t_plural, tank)
                end

                if val == "" then val = "no facility tanks" end
            elseif f[1] == "FacilityTankMode" and raw == 0 then val = "0 (n/a, unit mode)"
            elseif f[1] == "FacilityTankDefs" and cfg.FacilityTankDefs then
                val = ""

                for idx = 1, #cfg.FacilityTankDefs do
                    local t_mode = "not connected to a tank"
                    if cfg.FacilityTankDefs[idx] == 1 then
                        t_mode = "connected to its unit tank"
                    elseif cfg.FacilityTankDefs[idx] == 2 then
                        t_mode = "connected to a facility tank"
                    end

                    val = val .. util.trinary(idx == 1, "", "\n") .. util.sprintf(" \x07 unit %d - %s", idx, t_mode)
                end

                if val == "" then val = "no facility tanks" end
            end

            if val == "nil" then val = "<not set>" end

            local c = util.trinary(alternate, g_lg_fg_bg, cpair(colors.gray,colors.white))
            alternate = not alternate

            if string.len(val) > val_max_w then
                local lines = util.strwrap(val, inner_width)
                height = #lines + 1
            end

            local line = Div{parent=setting_list,height=height,fg_bg=c}
            TextBox{parent=line,text=f[2],width=string.len(f[2]),fg_bg=cpair(colors.black,line.get_fg_bg().bkg)}

            local textbox
            if height > 1 then
                textbox = TextBox{parent=line,x=1,y=2,text=val,height=height-1,alignment=LEFT}
            else
                textbox = TextBox{parent=line,x=label_w+1,y=1,text=val,alignment=RIGHT}
            end

            if f[1] == "AuthKey" then tool_ctl.auth_key_textbox = textbox end
        end
    end
end

-- reset terminal screen
local function reset_term()
    term.setTextColor(colors.white)
    term.setBackgroundColor(colors.black)
    term.clear()
    term.setCursorPos(1, 1)
end

-- run the supervisor configurator
---@param ask_config? boolean indicate if this is being called by the supervisor startup app due to an invalid configuration
function configurator.configure(ask_config)
    tool_ctl.ask_config = ask_config == true

    load_settings(settings_cfg, true)
    tool_ctl.has_config = load_settings(ini_cfg)

    reset_term()

    ppm.mount_all()

    -- set overridden colors
    for i = 1, #style.colors do
        term.setPaletteColor(style.colors[i].c, style.colors[i].hex)
    end

    local status, error = pcall(function ()
        local display = DisplayBox{window=term.current(),fg_bg=style.root}
        config_view(display)

        while true do
            local event, param1, param2, param3, param4, param5 = util.pull_event()

            -- handle event
            if event == "timer" then
                tcd.handle(param1)
            elseif event == "mouse_click" or event == "mouse_up" or event == "mouse_drag" or event == "mouse_scroll" or event == "double_click" then
                local m_e = core.events.new_mouse_event(event, param1, param2, param3)
                if m_e then display.handle_mouse(m_e) end
            elseif event == "char" or event == "key" or event == "key_up" then
                local k_e = core.events.new_key_event(event, param1, param2)
                if k_e then display.handle_key(k_e) end
            elseif event == "paste" then
                display.handle_paste(param1)
            elseif event == "peripheral_detach" then
                ppm.handle_unmount(param1)
            elseif event == "peripheral" then
                ppm.mount(param1)
            elseif event == "modem_message" and tool_ctl.nic ~= nil and tool_ctl.net_listen then
                local s_pkt = tool_ctl.nic.receive(param1, param2, param3, param4, param5)

                if s_pkt and s_pkt.protocol() == PROTOCOL.SCADA_MGMT then
                    local mgmt_pkt = comms.mgmt_packet()
                    if mgmt_pkt.decode(s_pkt) then
                        tcd.abort(handle_timeout)
                        handle_packet(mgmt_pkt.get())
                    end
                end
            end

            if event == "terminate" then return end
        end
    end)

    -- restore colors
    for i = 1, #style.colors do
        local r, g, b = term.nativePaletteColor(style.colors[i].c)
        term.setPaletteColor(style.colors[i].c, r, g, b)
    end

    reset_term()
    if not status then
        println("configurator error: " .. error)
    end

    return status, error
end

return configurator