require "common.globals"
require "common.class"

local PageView = require "api.page.pageview"

---@class Screen
---@field pageview PageView
local Screen = {
    __name = "Screen"
}

---Create a new Screen instance
---@param params? Screen
---@return Screen
function Screen.new(params)
    local self = CreateInstance(Screen, params)
    self.pageview = PageView.new()
    return self
end

---Initialize screen
function Screen:init()

end

---@param button integer # options are under the `game` table prefixed with `BUTTON`
function Screen:handleButtonInput(button)
    if self.pageview:get() then
        self.pageview:get():handleButtonInput(button)
    end
end

---@param knob integer # `0` = Left, `1` = Right
---@param delta number # in radians, `-2*pi` to `0` (turning CCW) and `0` to `2*pi` (turning CW)
function Screen:handleKnobInput(knob, delta)
    if self.pageview:get() then
        self.pageview:get():handleKnobInput(knob, delta)
    end
end

---@param x number
---@param y number
---@param button integer # `0` = Left, `1` = Right, `2` = Middle
function Screen:handleMouseInput(x, y, button)
    if self.pageview:get() then
        self.pageview:get():handleMouseInput(x, y, button)
    end
end

---@class ScreenCallbackObject
---@field reason string # short string representation what the cb object is about
---@field hint any # hint object to help continue code flow in parent

---Event callback when screen gets deactivated (eg.: pageview is empty)
---@param obj ScreenCallbackObject
function Screen.onDeactivation(obj)
    
end

function Screen:deactivate()
    self.onDeactivation({reason = "deactivation"})
end

---@param deltaTime number # frametime in seconds
function Screen:render(deltaTime)
    self.pageview:render(deltaTime)
end

return Screen