/datum/round_event_control/aurora_caelus
	name = "Aurora Caelus"
	typepath = /datum/round_event/aurora_caelus
	max_occurrences = 1
	weight = 1
	earliest_start = 5 MINUTES
	category = EVENT_CATEGORY_FRIENDLY
	description = "A colourful display can be seen through select windows. And the kitchen."

/datum/round_event_control/aurora_caelus/can_spawn_event(players, allow_magic = FALSE)
	if(!SSmapping.empty_space)
		return FALSE
	return ..()

/datum/round_event/aurora_caelus
	announce_when = 1
	start_when = 21
	end_when = 80

/datum/round_event/aurora_caelus/announce(fake)
	priority_announce("[station_name()]: A harmless cloud of ions is approaching your station, and will exhaust their energy battering the hull. Nanotrasen has approved a short break for all employees to relax and observe this very rare event. During this time, starlight will be bright but gentle, shifting between quiet green and blue colors. Any staff who would like to view these lights for themselves may proceed to the area nearest to them with viewing ports to open space. We hope you enjoy the lights.",
	sound = 'sound/announcer/notice/notice2.ogg',
	sender_override = "Nanotrasen Meteorology Division")
	if (fake)
		return
	for(var/V in GLOB.player_list)
		var/mob/M = V
		var/pref_volume = M.client.prefs.read_preference(/datum/preference/numeric/volume/sound_midi)
		if(pref_volume > 0 && is_station_level(M.z))
			M.playsound_local(M, 'sound/ambience/aurora_caelus/aurora_caelus.ogg', 20 * (pref_volume/100), FALSE, pressure_affected = FALSE)
	fade_space(fade_in = TRUE)
	fade_kitchen(fade_in = TRUE)

/datum/round_event/aurora_caelus/start()
	if(!prob(1) && !check_holidays(APRIL_FOOLS))
		return

	var/list/human_blacklist = list()
	for(var/area/station/service/kitchen/affected_area in GLOB.areas)
		var/obj/machinery/oven/roast_ruiner = locate() in affected_area
		if(roast_ruiner)
			roast_ruiner.balloon_alert_to_viewers("oh egads!")
			var/turf/ruined_roast = get_turf(roast_ruiner)
			ruined_roast.atmos_spawn_air("[GAS_PLASMA]=100;[TURF_TEMPERATURE(1000)]")
			message_admins("Aurora Caelus event caused an oven to ignite at [ADMIN_VERBOSEJMP(ruined_roast)].")
			log_game("Aurora Caelus event caused an oven to ignite at [loc_name(ruined_roast)].")
			announce_to_ghosts(roast_ruiner)
			for(var/mob/living/carbon/human/seymour in viewers(roast_ruiner, 7))
				if (seymour in human_blacklist)
					continue
				human_blacklist += seymour
				if(seymour.mind && istype(seymour.mind.assigned_role, /datum/job/cook))
					seymour.say("My roast is ruined!!!", forced = "ruined roast")
					seymour.emote("scream")

/datum/round_event/aurora_caelus/tick()
	if(activeFor % 8 != 0)
		return
	var/aurora_color = hsl_gradient((activeFor - start_when) / (end_when - start_when), 0, "#A2FF80", 1, "#A2FFEE")
	set_starlight(aurora_color)

	for(var/area/station/service/kitchen/affected_area in GLOB.areas)
		for(var/turf/open/kitchen_floor in affected_area.get_turfs_from_all_zlevels())
			kitchen_floor.set_light(l_color = aurora_color)

/datum/round_event/aurora_caelus/end()
	fade_space()
	fade_kitchen()
	priority_announce("The aurora caelus event is now ending. Starlight conditions will slowly return to normal. When this has concluded, please return to your workplace and continue work as normal. Have a pleasant shift, [station_name()], and thank you for watching with us.",
	sound = 'sound/announcer/notice/notice2.ogg',
	sender_override = "Nanotrasen Meteorology Division")

/datum/round_event/aurora_caelus/proc/fade_space(fade_in = FALSE)
	set waitfor = FALSE
	// iterate all glass tiles
	var/start_color = hsl_gradient(1, 0, "#A2FF80", 1, "#A2FFEE")
	var/start_range = GLOB.starlight_range * 1.75
	var/start_power = GLOB.starlight_power * 0.6
	var/end_color = GLOB.base_starlight_color
	var/end_range = GLOB.starlight_range
	var/end_power = GLOB.starlight_power
	if(fade_in)
		end_color = hsl_gradient(0, 0, "#A2FF80", 1, "#A2FFEE")
		end_range = start_range
		end_power = start_power
		start_color = GLOB.base_starlight_color
		start_range = GLOB.starlight_range
		start_power = GLOB.starlight_power

	for(var/i in 1 to 5)
		var/walked_color = hsl_gradient(i/5, 0, start_color, 1, end_color)
		var/walked_range = LERP(start_range, end_range, i/5)
		var/walked_power = LERP(start_power, end_power, i/5)
		set_starlight(walked_color, walked_range, walked_power)
		sleep(8 SECONDS)
	set_starlight(end_color, end_range, end_power)

/datum/round_event/aurora_caelus/proc/fade_kitchen(fade_in = FALSE)
	set waitfor = FALSE
	var/start_color = hsl_gradient(1, 0, "#A2FF80", 1, "#A2FFEE")
	var/start_range = 1
	var/start_power = 0.75
	var/end_color = COLOR_BLACK
	var/end_range = 0.5
	var/end_power = 0
	if(fade_in)
		end_color = hsl_gradient(0, 0, "#A2FF80", 1, "#A2FFEE")
		end_range = start_range
		end_power = start_power
		start_color = COLOR_BLACK
		start_range = 0.5
		start_power = 0

	for(var/i in 1 to 5)
		var/walked_color = hsl_gradient(i/5, 0, start_color, 1, end_color)
		var/walked_range = LERP(start_range, end_range, i/5)
		var/walked_power = LERP(start_power, end_power, i/5)
		for(var/area/station/service/kitchen/affected_area in GLOB.areas)
			for(var/turf/open/kitchen_floor in affected_area.get_turfs_from_all_zlevels())
				kitchen_floor.set_light(walked_range, walked_power, walked_color)
		sleep(8 SECONDS)
	for(var/area/station/service/kitchen/affected_area in GLOB.areas)
		for(var/turf/open/kitchen_floor in affected_area.get_turfs_from_all_zlevels())
			kitchen_floor.set_light(end_range, end_power, end_color)