//See comp_helpers.dm for helper procs.
/datum/component/shadekin
	VAR_PRIVATE/mob/living/owner
	dupe_mode = COMPONENT_DUPE_UNIQUE

	//Energy Vars
	///How much energy we have RIGHT NOW
	var/dark_energy = 100
	///How much energy we can have
	var/max_dark_energy = 100
	///Always be at our max_dark_energy
	var/dark_energy_infinite = FALSE
	///How much energy we generate in the dark
	var/energy_dark = 0.75
	///How much energy we generate in the light
	var/energy_light = 0.25
	///If we care about eye color when it comes to factoring in energy
	var/eye_color_influences_energy = TRUE
	///Energy gain from nutrition
	var/nutrition_conversion_scaling = 0.5
	///If we convert nutrition to energy
	var/nutrition_energy_conversion = FALSE

	//Phase Vars
	///Are we currently in a phase transition?
	var/doing_phase = FALSE
	///Are we currently phased?
	var/in_phase = FALSE
	///Chance to break lights on phase-in
	var/flicker_break_chance = 0
	///Color that lights will flicker to on phase-in. Off by default.
	var/flicker_color
	///Time that lights will flicker on phase-in. Default is 10 times.
	var/flicker_time = 10
	///Range that we flicker lights. Default is 10.
	var/flicker_distance = 10
	///If we can get the 'phase debuff' applied to us. (No using guns, dropping things in hands, etc).
	var/normal_phase = TRUE
	///If we drop items on phase.
	var/drop_items_on_phase = FALSE
	///If cameras count as watchers for us
	var/camera_counts_as_watcher = FALSE

	//Dark Respite Vars (Unused on Virgo)
	///If we are in dark respite or not
	var/in_dark_respite = FALSE
	var/manual_respite = FALSE
	var/respite_activating = FALSE
	///If we return to The Dark upon death or not.
	var/no_retreat = FALSE

	//Dark Tunneling Vars (Unused on Virgo)
	///If we have already made a dark tunnel
	var/created_dark_tunnel = FALSE

	//Dark Maw Vars (Unused on Virgo)
	///Our current active dark maws
	var/list/active_dark_maws = list()

	//Ability Vars
	///The innate abilities we start with
	var/list/shadekin_abilities = list(/datum/power/shadekin/phase_shift,
										/datum/power/shadekin/regenerate_other,
										/datum/power/shadekin/create_shade)
	///Datum holder. Largely ignore this.
	var/list/shadekin_ability_datums = list()

	//Misc Vars
	///Eyecolor
	var/eye_color = BLUE_EYES
	///For downstream. Enables some extra verbs. Causes things to drop in hand when you phase.
	var/extended_kin = FALSE

/datum/component/shadekin/phase_only
	shadekin_abilities = list(/datum/power/shadekin/phase_shift)

/datum/component/shadekin/full
	shadekin_abilities = list(/datum/power/shadekin/phase_shift,
								/datum/power/shadekin/regenerate_other,
								/datum/power/shadekin/create_shade,
								/datum/power/shadekin/dark_maw,
								/datum/power/shadekin/dark_respite,
								/datum/power/shadekin/dark_tunneling)
	extended_kin = TRUE
	drop_items_on_phase = TRUE
	camera_counts_as_watcher = TRUE

/datum/component/shadekin/full/rakshasa
	flicker_time = 0 //Rakshasa don't flicker lights when they phase in.
	dark_energy_infinite = TRUE
	normal_phase = FALSE

/datum/component/shadekin/Initialize()
	//normal component bs
	if(!isliving(parent) || issilicon(parent))
		return COMPONENT_INCOMPATIBLE
	owner = parent
	if(ishuman(owner))
		RegisterSignal(owner, COMSIG_SHADEKIN_COMPONENT, PROC_REF(handle_comp)) //Happens every species tick.
	else
		RegisterSignal(owner, COMSIG_LIVING_LIFE, PROC_REF(handle_comp)) //Happens every life tick (mobs)

	//generates powers and then adds them
	build_and_add_abilities()

	handle_comp() //First hit is free!

	//decides what 'eye color' we are and how much energy we should get
	set_shadekin_eyecolor() //Gets what eye color we are.
	set_eye_energy() //Sets the energy values based on our eye color.

	//Misc stuff we need to do
	add_verb(owner, /mob/living/proc/shadekin_control_panel)

/datum/component/shadekin/Destroy(force)
	if(ishuman(owner))
		UnregisterSignal(owner, COMSIG_SHADEKIN_COMPONENT)
	else
		UnregisterSignal(owner, COMSIG_LIVING_LIFE)
	remove_verb(owner, /mob/living/proc/shadekin_control_panel)
	for(var/datum/power in shadekin_ability_datums)
		qdel(power)
	for(var/obj/effect/abstract/dark_maw/dm as anything in active_dark_maws) //if the component gets destroyed so does your precious maws
		if(!QDELETED(dm))
			qdel(dm)
	if(owner.shadekin_display)
		owner.shadekin_display.invisibility = INVISIBILITY_ABSTRACT //hide it
	replace_shadekin_master()
	active_dark_maws.Cut()
	shadekin_abilities.Cut()
	shadekin_ability_datums.Cut()
	owner = null
	. = ..()

/datum/component/shadekin/proc/recalc_values()
	set_shadekin_eyecolor() //Gets what eye color we are.
	set_eye_energy() //Sets the energy values based on our eye color.

///Handles the component running.
/datum/component/shadekin/proc/handle_comp()
	SIGNAL_HANDLER
	if(QDELETED(parent))
		return
	if(owner.stat == DEAD) //dead, don't process.
		return
	handle_shade()

///Handles the shadekin's energy gain and loss.
/datum/component/shadekin/proc/handle_shade()
	//Shifted kin don't gain/lose energy (and save time if we're at the cap)
	var/darkness = 1
	var/dark_gains = 0

	var/suit = owner.get_equipped_item(slot_wear_suit)
	if(istype(suit, /obj/item/clothing/suit/space))
		if(dark_energy)
			to_chat(owner, span_warning("You feel your energy waning and your powers being blocked from the heavy equipment you're wearing!"))
		dark_energy = 0
		return

	var/turf/T = get_turf(owner)
	if(!T)
		dark_gains = 0
		return

	var/brightness = T.get_lumcount() //Brightness in 0.0 to 1.0
	darkness = 1-brightness //Invert
	var/is_dark = (darkness >= 0.5)

	if(in_phase)
		dark_gains = 0
	else
		//Heal (very) slowly in good darkness
		if(is_dark)
		//The below sends a DB query...This needs to be fixed before this can be enabled as we're now dealing with signal handlers.
		//Reenable once that mess is taken care of.
			owner.adjustFireLoss((-0.10)*darkness)
			owner.adjustBruteLoss((-0.10)*darkness)
			owner.adjustToxLoss((-0.10)*darkness)
			//energy_dark and energy_light are set by the shadekin eye traits.
			//These are balanced around their playstyles and 2 planned new aggressive abilities
			dark_gains = energy_dark
		else
			dark_gains = energy_light

	handle_nutrition_conversion(dark_gains)

	shadekin_adjust_energy(dark_gains)

	//Update huds
	update_shadekin_hud()

/datum/component/shadekin/proc/calculate_stun()
	var/stun_time = 3
	if(flicker_time > 0)
		stun_time -= min(flicker_time / 5, 1)
	if(flicker_distance > 0)
		stun_time -= min(flicker_distance / 5, 1)
	if(flicker_break_chance > 0)
		stun_time -= min(flicker_break_chance / 5, 1)
	return stun_time

///Sees if the savefile we have selected in CHARACTER SETUP is the same as our ACTIVE CHARACTER savefile.
/datum/component/shadekin/proc/correct_savefile_selected()
	if(owner.client.prefs.default_slot == owner.mind.loaded_from_slot)
		return TRUE
	return FALSE

/datum/component/shadekin/tgui_interact(mob/user, datum/tgui/ui)
	ui = SStgui.try_update_ui(user, src, ui)
	if(!ui)
		ui = new(user, src, "ShadekinConfig", "Shadekin Config")
		ui.open()

/datum/component/shadekin/tgui_data(mob/user)
	var/data = list(
		"stun_time" = calculate_stun(),
		"flicker_time" = flicker_time,
		"flicker_color" = flicker_color,
		"flicker_break_chance" = flicker_break_chance,
		"flicker_distance" = flicker_distance,
		"no_retreat" = no_retreat,
		"nutrition_energy_conversion" = nutrition_energy_conversion,
		"extended_kin" = extended_kin,
		"savefile_selected" = correct_savefile_selected()
	)

	return data

/datum/component/shadekin/tgui_close(mob/user)
	SScharacter_setup.queue_preferences_save(user?.client?.prefs)
	. = ..()

/datum/component/shadekin/tgui_act(action, list/params, datum/tgui/ui, datum/tgui_state/state)
	if(..())
		return TRUE

	switch(action)
		if("adjust_time")
			var/new_time = text2num(params["val"])
			new_time = CLAMP(new_time, 2, 20)
			if(!isnum(new_time))
				return FALSE
			flicker_time = new_time
			ui.user.write_preference_directly(/datum/preference/numeric/living/flicker_time, new_time, WRITE_PREF_MANUAL, save_to_played_slot = TRUE)
			return TRUE
		if("adjust_color")
			var/set_new_color = tgui_color_picker(ui.user, "Select a color you wish the lights to flicker as (Default is #E0EFF0)", "Color Selector", flicker_color)
			if(!set_new_color)
				return FALSE
			flicker_color = set_new_color
			ui.user.write_preference_directly(/datum/preference/color/living/flicker_color, set_new_color, WRITE_PREF_MANUAL, save_to_played_slot = TRUE)
			return TRUE
		if("adjust_break")
			var/new_break_chance = text2num(params["val"])
			new_break_chance = CLAMP(new_break_chance, 0, 25)
			if(!isnum(new_break_chance))
				return FALSE
			flicker_break_chance = new_break_chance
			ui.user.write_preference_directly(/datum/preference/numeric/living/flicker_break_chance, new_break_chance, WRITE_PREF_MANUAL, save_to_played_slot = TRUE)
			return TRUE
		if("adjust_distance")
			var/new_distance = text2num(params["val"])
			new_distance = CLAMP(new_distance, 4, 10)
			if(!isnum(new_distance))
				return FALSE
			flicker_distance = new_distance
			ui.user.write_preference_directly(/datum/preference/numeric/living/flicker_distance, new_distance, WRITE_PREF_MANUAL, save_to_played_slot = TRUE)
			return TRUE
		if("toggle_retreat")
			var/new_retreat = !no_retreat
			no_retreat = !no_retreat
			ui.user.write_preference_directly(/datum/preference/toggle/living/dark_retreat_toggle, new_retreat, WRITE_PREF_MANUAL, save_to_played_slot = TRUE)
		if("toggle_nutrition")
			var/new_retreat = !nutrition_energy_conversion
			nutrition_energy_conversion = !nutrition_energy_conversion
			ui.user.write_preference_directly(/datum/preference/toggle/living/shadekin_nutrition_conversion, new_retreat, WRITE_PREF_MANUAL, save_to_played_slot = TRUE)

/mob/living/proc/shadekin_control_panel()
	set name = "Shadekin Control Panel"
	set desc = "Allows you to adjust the settings of various shadekin settings!"
	set category = "Abilities.Shadekin"

	var/datum/component/shadekin/SK = get_shadekin_component()
	if(!SK)
		to_chat(src, span_warning("Only a shadekin can use that!"))
		return FALSE

	SK.tgui_interact(src)