local Constraints = require "lib.simple_ui.core.constraints"
local SingleChildElement = require "lib.simple_ui.core.single_child_element"

--- @class Placeholder : SingleChildElement
local element = setmetatable({}, SingleChildElement)
element.__index = element
element.type = "Placeholder"

function element:layout()
    self._size_ = Vec3 { self._constraints_.maxWidth, self._constraints_.maxHeight }

    if not self._child_ then return end
    self._child_._constraints_ = Constraints(self._constraints_)
    self._child_:layout()
end

function element:draw()
    love.graphics.rectangle("line", self._offset_.x, self._offset_.y, self._size_.x, self._size_.y)
    love.graphics.line(self._offset_.x, self._offset_.y, self._offset_.x + self._size_.x, self._offset_.y + self._size_
        .y)
    love.graphics.line(self._offset_.x, self._offset_.y + self._size_.y, self._offset_.x + self._size_.x, self._offset_
        .y)
end

--- @return Placeholder
--- @param values {child: UIElement?}
function element:new(values)
    return SingleChildElement.new(self, values)
end

return element