require("common.class")
local Dim = require("common.dimensions")
local ServiceField = require("titlescreen.fields.service.servicefield")

---@class InputKnobField: ServiceField
---@field knob integer
local InputKnobField = {}

function InputKnobField:new(o)
    o = Inherit(self, ServiceField, o)

    o.knob = o.knob or nil

    return o
end

function InputKnobField:activate() end

function InputKnobField:focus() end

function InputKnobField:deactivate() end

function InputKnobField:drawValue(deltaTime)
    local knobAngle = game.GetKnob(self.knob)
    local valuePosX = Dim.design.width / 2
    local sliderPosX = valuePosX + 64
    local sliderWidth = 256
    local sliderHeight = ServiceField.SERVICE_DEFAULT_FONT_SIZE
    local sliderBgColor = {255, 0, 0, 255}
    local sliderFrameColor = ServiceField.SERVICE_DEFAULT_FONT_COLOR
    local sliderFrameWidth = 1

    local maxValue = 1024
    self.value = math.floor(knobAngle * maxValue / (2 * math.pi)) % maxValue
    --self.value = knobAngle

    --draw value
    gfx.BeginPath()
    gfx.Text(self.value, valuePosX, 0)

    --draw slider
    gfx.BeginPath()
    gfx.Rect(sliderPosX, 0, sliderWidth, sliderHeight)
    gfx.FillColor(table.unpack(sliderBgColor))
    gfx.StrokeColor(table.unpack(sliderFrameColor))
    gfx.StrokeWidth(sliderFrameWidth)
    gfx.Fill()
    gfx.Stroke()

    local sliderIndicatorX = sliderPosX + self.value * sliderWidth / maxValue
    local sliderIndicatorWidth = 4
    local sliderIndicatorColor = {0, 255, 0, 255}
    --draw indicator
    gfx.BeginPath()
    gfx.Rect(sliderIndicatorX, sliderFrameWidth, sliderIndicatorWidth, sliderHeight - 2 * sliderFrameWidth)
    gfx.FillColor(table.unpack(sliderIndicatorColor))
    gfx.Fill()

end

return InputKnobField