import "CoreLibs/graphics"
import "CoreLibs/object"
import "CoreLibs/math"

local gfx <const> = playdate.graphics

class("Meter").extends(gfx.sprite)

function Meter:init(value, w, h, vertical)
   Meter.super.init(self)

   self.vertical = vertical or true
   self:setSize(w, h)
   self:setZIndex(999)
   self:setValue(value)
end

function Meter:setValue(value)
   local img = gfx.image.new(self:getSize())
   gfx.pushContext(img)
      gfx.drawRect(0, 0, self:getSize())
      local x, y, w, h = 0
      if self.vertical then
         x = 0
         w = self.width
         y = self.height - playdate.math.lerp(0, self.height, value / 100)
         h = self.height - y
      else
         y = 0
         h = self.height
         x = 0
         w = self.width - playdate.math.lerp(0, self.width, value / 100)
      end
      gfx.setColor(gfx.kColorWhite)
      gfx.fillRect(1, 1, self.width-2, self.height-2)
      gfx.setColor(gfx.kColorBlack)
      gfx.fillRect(x, y, w, h)
   gfx.popContext()
   self:setImage(img)
end