require("common.class")

---@class Field
---@field parent Page
---@field posX number
---@field posY number
local Field = {
    ---@type nil|fun(button: integer): boolean
    ---returns true if further button input processing should be stopped, otherwise false
    handleButtonInput = nil,
    ---@type nil|fun(knob: integer, delta: number): boolean
    ---returns true if further button input processing should be stopped, otherwise false
    handleKnobInput = nil,
}

---Create a new Field instance
---@param o table
---@return Field
function Field:new(o)
    o = Base(self, o)

    --set instance members

    o.parent = o.parent or nil
    o.posX = o.posX or 0
    o.posY = o.posY or 0

    return o
end

function Field:activate() end

function Field:focus() end

function Field:deactivate() end

function Field:render(deltaTime)
    gfx.Save()

    gfx.Translate(self.posX, self.posY)

    gfx.BeginPath()
    gfx.FillColor(255, 0, 128, 192)
    gfx.StrokeColor(0, 0, 0)
    gfx.StrokeWidth(2)
    gfx.Rect(-50, -50, 100, 100)
    gfx.Fill()
    gfx.Stroke()

    gfx.BeginPath()
    gfx.MoveTo(-50, 0)
    gfx.LineTo(50, 0)
    gfx.MoveTo(0, -50)
    gfx.LineTo(0, 50)
    gfx.StrokeColor(0, 0, 0, 64)
    gfx.StrokeWidth(2)
    gfx.Stroke()

    local fontSize = 18
    local fontMargin = 4
    gfx.BeginPath()
    gfx.FontSize(fontSize)
    gfx.LoadSkinFont("dfmarugoth.ttf")
    gfx.FillColor(0, 0, 0)
    gfx.TextAlign(gfx.TEXT_ALIGN_CENTER | gfx.TEXT_ALIGN_MIDDLE)
    gfx.Text("TEXTURE", 0, -fontSize / 2 - fontMargin)
    gfx.Text("MISSING", 0, fontSize / 2 + fontMargin)

    gfx.Restore()
end

return Field