local assertArgs = include "assertArgs"

local util = include "util"

local ToastManager = lib "class" ("ToastManager")

ToastManager:include(mixin "Position")
ToastManager:include(mixin "Angle")

ToastManager.static.TOAST_DURATION = 3.5 -- seconds
ToastManager.static.TOAST_FADE_TIME = 0.2
ToastManager.static.TOAST_DIMENSIONS = { width = 0.2, height = 0.1, depth = 0.02 }

function ToastManager:initialize(args)
    assertArgs(args, "x", "y", "z", "angle", "ax", "ay", "az")
    self:setPosition(args.x, args.y, args.z)
    self:setAngle(args.angle, args.ax, args.ay, args.az)
    self.toasts = {}
    return self
end

function ToastManager:addToast(message)
    self.toasts[#self.toasts + 1] = {
        message = message,
        time = ToastManager.static.TOAST_DURATION,
        lerpedIndex = #self.toasts
    }
end

function ToastManager:update(dt)

    util.foreachirev(self.toasts, function(toast, i)
        toast.time = toast.time - dt
        if toast.time <= 0 then
            table.remove(self.toasts, i)
        end
        toast.lerpedIndex = util.lerp(toast.lerpedIndex, i, 5 * dt)
    end)

end

function ToastManager:draw()

    util.foreachi(self.toasts, function(toast, i)
        local fade = math.min(toast.time, ToastManager.static.TOAST_FADE_TIME) / ToastManager.static.TOAST_FADE_TIME
        lovr.graphics.setColor(1, 1, 1, fade)
        local x, y, z = self:getX() + (1 - fade) * 0.2, self:getY() - (toast.lerpedIndex - 1) * 0.12, self:getZ()
        local angle, ax, ay, az = self:getAngle(), self:getAX(), self:getAY(), self:getAZ()
        lovr.graphics.box(
            "line",
            x, y, z,
            ToastManager.static.TOAST_DIMENSIONS.width, ToastManager.static.TOAST_DIMENSIONS.height, ToastManager.static.TOAST_DIMENSIONS.depth,
            angle, ax, ay, az
        )
        lovr.graphics.print(
            toast.message,
            x, y, z,
            0.02,
            angle, ax, ay, az
        )
    end)

end

return ToastManager