gui

local computer = require("computer")
local component = require("component")
local table = require("table")
local unicode = require("unicode")
local math = require("math")

local gui = {}
local screenAddress = component.list("screen")()
local gpuAddress = component.list("gpu")()
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local function isPushed(px, py, t, button)
    local x2, y2

    if t.W then
        x2 = t.PosX + t.W
    else
        x2 = t.PosX + 1
    end

    if t.H then
        y2 = t.PosY + t.H
    else
        y2 = t.PosY + 1
    end

    if t.PosX <= px and x2 > px and t.PosY <= py and y2 > py and button == 0 and t.Enabled then
        return true
    else
        return false
    end
end
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function gui.createButton(text, x, y, colors, fun)
    local obj = {}
        obj.Text = text
        obj.Type = "button"
        obj.PosX = x
        obj.PosY = y
        obj.W = unicode.wlen(text)
        obj.H = 1
        obj.ColorOn = colors[1]
        obj.ColorTxtOn = colors[2]
        obj.ColorOff = colors[3]
        obj.ColorTxtOff = colors[4]
        obj.Enabled = true
        obj.Call = fun
        obj.Draw = function(self)
            local colorBack = component.proxy(gpuAddress).getBackground(0)
            local colorFore = component.proxy(gpuAddress).getForeground(0xFFFFFF)
            --
            if self.Enabled  then
                component.proxy(gpuAddress).setBackground(self.ColorOn)
                component.proxy(gpuAddress).setForeground(self.ColorTxtOn)
            else
                component.proxy(gpuAddress).setBackground(self.ColorOff)
                component.proxy(gpuAddress).setForeground(self.ColorTxtOff)
            end
            component.proxy(gpuAddress).set(self.PosX, self.PosY, self.Text)
            --
            component.proxy(gpuAddress).setBackground(colorBack)
            component.proxy(gpuAddress).setForeground(colorFore)
        end
    return obj
end

function gui.createFlag(text, x, y, colors)
    local obj = {}
        obj.Text = text
        obj.Type = "flag"
        obj.PosX = x
        obj.PosY = y
        obj.Active = false
        obj.ColorOn = colors[1]
        obj.ColorTxtOn = colors[2] or 0xFFFFFF - colors[1]
        obj.Enabled = true
        obj.Draw = function(self)
            local colorBack = component.proxy(gpuAddress).getBackground(0)
            local colorFore = component.proxy(gpuAddress).getForeground(0xFFFFFF)
            --
            component.proxy(gpuAddress).setBackground(0xFFFFFF)
            component.proxy(gpuAddress).setForeground(0)
            if self.Active then
                component.proxy(gpuAddress).set(self.PosX, self.PosY, "V")
            else
                component.proxy(gpuAddress).set(self.PosX, self.PosY, " ")
            end
            component.proxy(gpuAddress).setBackground(self.ColorOn)
            component.proxy(gpuAddress).setForeground(self.ColorTxtOn)
            component.proxy(gpuAddress).set(self.PosX + 1, self.PosY, self.Text)
            --
            component.proxy(gpuAddress).setBackground(colorBack)
            component.proxy(gpuAddress).setForeground(colorFore)
        end
    return obj
end

function gui.createProgressBar(x, y, w, h, colors, vertical)
    local obj = {}
        obj.Text = text
        obj.Type = "progBar"
        obj.PosX = x
        obj.PosY = y
        obj.W = w
        obj.H = h
        obj.Per = 0
        obj.Vertical = vertical or false
        obj.ColorOn = colors[1]
        obj.ColorTxtOn = colors[2] or 0xFFFFFF - colors[1]
        obj.Draw = function(self)
            component.proxy(gpuAddress).setBackground(0x555555)
            component.proxy(gpuAddress).fill(self.PosX, self.PosY, self.W, self.H, " ")
            if self.Per > 0 then
                local onePer = self.W / 100
                component.proxy(gpuAddress).setBackground(self.ColorOn)
                component.proxy(gpuAddress).fill(self.PosX, self.PosY, math.floor(onePer * self.Per), self.H, " ")
            elseif self.Per >= 100 then
                self.Per = 100
                component.proxy(gpuAddress).setBackground(self.ColorOn)
                component.proxy(gpuAddress).fill(self.PosX, self.PosY, self.W, self.H, " ")
            end
        end
    return obj
end

function gui.draw(buttons)
    for i, k in pairs(buttons) do
        k:Draw()
    end
    component.proxy(gpuAddress).setBackground(0)
    component.proxy(gpuAddress).setForeground(0xFFFFFF)
end

function gui.pull(buttons, timeOut)
    local t, _, pullX, pullY, click, nick = computer.pullSignal(timeOut)
    if t == "touch" then
        for i, k in pairs(buttons) do
            if isPushed(pullX, pullY, k, click) then
                if k.Type == "button" then
                    if type(k.Call) == "function" then
                        return true, k.Call(nick)
                    else
                        return true, k.Call
                    end
                elseif k.Type == "flag" then
                    k.Active = not k.Active
                    return true, "toggle"
                end

            end
        end
    end
    return false
end

return gui