lighttroupe/luz-next

require 'cycle_logic'

class ProjectEffectDirectorToSelected < ProjectEffect
    include CycleLogic

    title                "Director Fade to Selected"
    description ""

    setting 'starting_director', :director

    setting 'forwards', :event, :summary => true

    setting 'crossfade_time', :timespan, :summary => true

    def tick
        @from_director ||= starting_director.one
        @to_directors_queue ||= []

        if forwards.now?
            chosen_director = $gui.chosen_next_director
            if chosen_director
                if @to_director
                    @to_directors_queue << chosen_director
                else
                    begin_transition_to_director(chosen_director)
                end
            end
        end
    end

    def render
        if @to_director
            progress = crossfade_time.progress_since(@crossfade_start, @crossfade_start_beat)
            crossfade_render(@from_director, @to_director, progress)
            if progress == 1.0
                @from_director = @to_director
                begin_transition_to_director(@to_directors_queue.shift)
            end
        else
            @from_director.render! if @from_director
        end
        yield
    end

    def begin_transition_to_director(director)
        @to_director = director
        @crossfade_start_time = $env[:time]
        @crossfade_start_beat = $env[:beat]
    end
end