// The lighting system
//
// consists of light fixtures (/obj/machinery/light) and light tube/bulb items (/obj/item/weapon/light)


// status values shared between lighting fixtures and items
#define LIGHT_OK 0
#define LIGHT_EMPTY 1
#define LIGHT_BROKEN 2
#define LIGHT_BURNED 3



/obj/item/wallframe/light_fixture
	name = "light fixture frame"
	desc = "Used for building lights."
	icon = 'icons/obj/lighting.dmi'
	icon_state = "tube-construct-item"
	result_path = /obj/machinery/light_construct
	inverse = 1

/obj/item/wallframe/light_fixture/small
	name = "small light fixture frame"
	icon_state = "bulb-construct-item"
	result_path = /obj/machinery/light_construct/small
	materials = list(MAT_METAL=MINERAL_MATERIAL_AMOUNT)


/obj/machinery/light_construct
	name = "light fixture frame"
	desc = "A light fixture under construction."
	icon = 'icons/obj/lighting.dmi'
	icon_state = "tube-construct-stage1"
	anchored = 1
	layer = 5
	var/stage = 1
	var/fixture_type = "tube"
	var/sheets_refunded = 2
	var/obj/machinery/light/newlight = null

/obj/machinery/light_construct/New(loc, ndir, building)
	..()
	if(building)
		dir = ndir

/obj/machinery/light_construct/examine(mob/user)
	..()
	switch(src.stage)
		if(1)
			user << "It's an empty frame."
		if(2)
			user << "It's wired."
		if(3)
			user << "The casing is closed."

/obj/machinery/light_construct/attackby(obj/item/weapon/W, mob/user, params)
	add_fingerprint(user)
	switch(stage)
		if(1)
			if(istype(W, /obj/item/weapon/wrench))
				playsound(src.loc, 'sound/items/Ratchet.ogg', 75, 1)
				usr << "<span class='notice'>You begin deconstructing [src]...</span>"
				if (!do_after(usr, 30/W.toolspeed, target = src))
					return
				new /obj/item/stack/sheet/metal( get_turf(src.loc), sheets_refunded )
				user.visible_message("[user.name] deconstructs [src].", \
					"<span class='notice'>You deconstruct [src].</span>", "<span class='italics'>You hear a ratchet.</span>")
				playsound(src.loc, 'sound/items/Deconstruct.ogg', 75, 1)
				qdel(src)
				return

			if(istype(W, /obj/item/stack/cable_coil))
				var/obj/item/stack/cable_coil/coil = W
				if(coil.use(1))
					switch(fixture_type)
						if ("tube")
							icon_state = "tube-construct-stage2"
						if("bulb")
							icon_state = "bulb-construct-stage2"
					stage = 2
					user.visible_message("[user.name] adds wires to [src].", \
						"<span class='notice'>You add wires to [src].</span>")
				else
					user << "<span class='warning'>You need one length of cable to wire [src]!</span>"
				return
		if(2)
			if(istype(W, /obj/item/weapon/wrench))
				usr << "<span class='warning'>You have to remove the wires first!</span>"
				return

			if(istype(W, /obj/item/weapon/wirecutters))
				stage = 1
				switch(fixture_type)
					if ("tube")
						icon_state = "tube-construct-stage1"
					if("bulb")
						icon_state = "bulb-construct-stage1"
				new /obj/item/stack/cable_coil(get_turf(loc), 1, "red")
				user.visible_message("[user.name] removes the wiring from [src].", \
					"<span class='notice'>You remove the wiring from [src].</span>", "<span class='italics'>You hear clicking.</span>")
				playsound(loc, 'sound/items/Wirecutter.ogg', 100, 1)
				return

			if(istype(W, /obj/item/weapon/screwdriver))
				user.visible_message("[user.name] closes [src]'s casing.", \
					"<span class='notice'>You close [src]'s casing.</span>", "<span class='italics'>You hear screwing.</span>")
				playsound(loc, 'sound/items/Screwdriver.ogg', 75, 1)
				switch(fixture_type)
					if("tube")
						newlight = new /obj/machinery/light/built(loc)
					if ("bulb")
						newlight = new /obj/machinery/light/small/built(loc)
				newlight.dir = dir
				transfer_fingerprints_to(newlight)
				qdel(src)
				return
	..()


/obj/machinery/light_construct/small
	name = "small light fixture frame"
	icon_state = "bulb-construct-stage1"
	fixture_type = "bulb"
	sheets_refunded = 1

// the standard tube light fixture
/obj/machinery/light
	name = "light fixture"
	icon = 'icons/obj/lighting.dmi'
	var/base_state = "tube"		// base description and icon_state
	icon_state = "tube1"
	desc = "A lighting fixture."
	anchored = 1
	layer = 5  					// They were appearing under mobs which is a little weird - Ostaf
	use_power = 2
	idle_power_usage = 2
	active_power_usage = 20
	power_channel = LIGHT //Lights are calc'd via area so they dont need to be in the machine list
	var/on = 0					// 1 if on, 0 if off
	var/on_gs = 0
	var/static_power_used = 0
	var/brightness = 8			// luminosity when on, also used in power calculation
	var/status = LIGHT_OK		// LIGHT_OK, _EMPTY, _BURNED or _BROKEN
	var/flickering = 0
	var/light_type = /obj/item/weapon/light/tube		// the type of light item
	var/fitting = "tube"
	var/switchcount = 0			// count of number of times switched on/off
								// this is used to calc the probability the light burns out

	var/rigged = 0				// true if rigged to explode

// the smaller bulb light fixture

/obj/machinery/light/small
	icon_state = "bulb1"
	base_state = "bulb"
	fitting = "bulb"
	brightness = 4
	desc = "A small lighting fixture."
	light_type = /obj/item/weapon/light/bulb


/obj/machinery/light/Move()
	if(status != LIGHT_BROKEN)
		broken(1)
	return ..()

/obj/machinery/light/built/New()
	status = LIGHT_EMPTY
	update(0)
	..()

/obj/machinery/light/small/built/New()
	status = LIGHT_EMPTY
	update(0)
	..()


// create a new lighting fixture
/obj/machinery/light/New()
	..()
	spawn(2)
		switch(fitting)
			if("tube")
				brightness = 8
				if(prob(2))
					broken(1)
			if("bulb")
				brightness = 4
				if(prob(5))
					broken(1)
		spawn(1)
			update(0)

/obj/machinery/light/Destroy()
	var/area/A = get_area(src)
	if(A)
		on = 0
//		A.update_lights()
	return ..()

/obj/machinery/light/update_icon()

	switch(status)		// set icon_states
		if(LIGHT_OK)
			icon_state = "[base_state][on]"
		if(LIGHT_EMPTY)
			icon_state = "[base_state]-empty"
			on = 0
		if(LIGHT_BURNED)
			icon_state = "[base_state]-burned"
			on = 0
		if(LIGHT_BROKEN)
			icon_state = "[base_state]-broken"
			on = 0
	return

// update the icon_state and luminosity of the light depending on its state
/obj/machinery/light/proc/update(trigger = 1)

	update_icon()
	if(on)
		if(!light || light.luminosity != brightness)
			switchcount++
			if(rigged)
				if(status == LIGHT_OK && trigger)
					explode()
			else if( prob( min(60, switchcount*switchcount*0.01) ) )
				if(status == LIGHT_OK && trigger)
					status = LIGHT_BURNED
					icon_state = "[base_state]-burned"
					on = 0
					SetLuminosity(0)
			else
				use_power = 2
				SetLuminosity(brightness)
	else
		use_power = 1
		SetLuminosity(0)

	active_power_usage = (brightness * 10)
	if(on != on_gs)
		on_gs = on
		if(on)
			static_power_used = brightness * 20 //20W per unit luminosity
			addStaticPower(static_power_used, STATIC_LIGHT)
		else
			removeStaticPower(static_power_used, STATIC_LIGHT)


// attempt to set the light's on/off status
// will not switch on if broken/burned/empty
/obj/machinery/light/proc/seton(s)
	on = (s && status == LIGHT_OK)
	update()

// examine verb
/obj/machinery/light/examine(mob/user)
	..()
	switch(status)
		if(LIGHT_OK)
			user << "It is turned [on? "on" : "off"]."
		if(LIGHT_EMPTY)
			user << "The [fitting] has been removed."
		if(LIGHT_BURNED)
			user << "The [fitting] is burnt out."
		if(LIGHT_BROKEN)
			user << "The [fitting] has been smashed."



// attack with item - insert light (if right type), otherwise try to break the light

/obj/machinery/light/attackby(obj/item/W, mob/living/user, params)

	//Light replacer code
	if(istype(W, /obj/item/device/lightreplacer))
		var/obj/item/device/lightreplacer/LR = W
		if(isliving(user))
			var/mob/living/U = user
			LR.ReplaceLight(src, U)
			return

	// attempt to insert light
	if(istype(W, /obj/item/weapon/light))
		if(status != LIGHT_EMPTY)
			user << "<span class='warning'>There is a [fitting] already inserted!</span>"
			return
		else
			src.add_fingerprint(user)
			var/obj/item/weapon/light/L = W
			if(istype(L, light_type))
				if(!user.drop_item())
					return
				status = L.status
				user << "<span class='notice'>You insert the [L.name].</span>"
				switchcount = L.switchcount
				rigged = L.rigged
				brightness = L.brightness
				on = has_power()
				update()

				qdel(L)

				if(on && rigged)
					explode()
			else
				user << "<span class='warning'>This type of light requires a [fitting]!</span>"
				return

		// attempt to break the light
		//If xenos decide they want to smash a light bulb with a toolbox, who am I to stop them? /N

	else if(status != LIGHT_BROKEN && status != LIGHT_EMPTY)
		user.changeNext_move(CLICK_CD_MELEE)
		user.do_attack_animation(src)
		if(W.damtype == STAMINA)
			return
		if(prob(1+W.force * 5))

			user.visible_message("<span class='danger'>[user.name] smashed the light!</span>", \
								"<span class='danger'>You hit the light, and it smashes!</span>", \
								 "<span class='italics'>You hear a tinkle of breaking glass.</span>")
			if(on && (W.flags & CONDUCT))
				if (prob(12))
					electrocute_mob(user, get_area(src), src, 0.3)
			broken()

		else
			user.visible_message("<span class='danger'>[user.name] hits the light!</span>")

	// attempt to stick weapon into light socket
	else if(status == LIGHT_EMPTY)
		if(istype(W, /obj/item/weapon/screwdriver)) //If it's a screwdriver open it.
			playsound(src.loc, 'sound/items/Screwdriver.ogg', 75, 1)
			user.visible_message("[user.name] opens [src]'s casing.", \
				"<span class='notice'>You open [src]'s casing.</span>", "<span class='italics'>You hear a noise.</span>")
			var/obj/machinery/light_construct/newlight = null
			switch(fitting)
				if("tube")
					newlight = new /obj/machinery/light_construct(src.loc)
					newlight.icon_state = "tube-construct-stage2"

				if("bulb")
					newlight = new /obj/machinery/light_construct/small(src.loc)
					newlight.icon_state = "bulb-construct-stage2"
			newlight.dir = src.dir
			newlight.stage = 2
			transfer_fingerprints_to(newlight)
			qdel(src)
			return

		user << "<span class='userdanger'>You stick \the [W] into the light socket!</span>"
		if(has_power() && (W.flags & CONDUCT))
			var/datum/effect_system/spark_spread/s = new /datum/effect_system/spark_spread
			s.set_up(3, 1, src)
			s.start()
			if (prob(75))
				electrocute_mob(user, get_area(src), src, rand(0.7,1.0))


// returns whether this light has power
// true if area has power and lightswitch is on
/obj/machinery/light/proc/has_power()
	var/area/A = src.loc.loc
	return A.master.lightswitch && A.master.power_light

/obj/machinery/light/proc/flicker(var/amount = rand(10, 20))
	set waitfor = 0
	if(flickering) return
	flickering = 1
	if(on && status == LIGHT_OK)
		for(var/i = 0; i < amount; i++)
			if(status != LIGHT_OK) break
			on = !on
			update(0)
			sleep(rand(5, 15))
		on = (status == LIGHT_OK)
		update(0)
	flickering = 0

// ai attack - make lights flicker, because why not

/obj/machinery/light/attack_ai(mob/user)
	src.flicker(1)
	return

// Aliens smash the bulb but do not get electrocuted./N
/obj/machinery/light/attack_alien(mob/living/carbon/alien/humanoid/user)//So larva don't go breaking light bulbs.
	if(status == LIGHT_EMPTY||status == LIGHT_BROKEN)
		user << "\green That object is useless to you."
		return
	else if (status == LIGHT_OK||status == LIGHT_BURNED)
		user.do_attack_animation(src)
		visible_message("<span class='danger'>[user.name] smashed the light!</span>", "<span class='italics'>You hear a tinkle of breaking glass.</span>")
		broken()
	return

/obj/machinery/light/attack_animal(mob/living/simple_animal/M)
	if(M.melee_damage_upper == 0)
		return
	if(status == LIGHT_EMPTY||status == LIGHT_BROKEN)
		M << "<span class='danger'>That object is useless to you.</span>"
		return
	else if (status == LIGHT_OK||status == LIGHT_BURNED)
		M.do_attack_animation(src)
		visible_message("<span class='danger'>[M.name] smashed the light!</span>", "<span class='italics'>You hear a tinkle of breaking glass.</span>")
		broken()
	return
// attack with hand - remove tube/bulb
// if hands aren't protected and the light is on, burn the player

/obj/machinery/light/attack_hand(mob/living/carbon/human/user)
	user.changeNext_move(CLICK_CD_MELEE)
	add_fingerprint(user)

	if(status == LIGHT_EMPTY)
		user << "There is no [fitting] in this light."
		return

	// make it burn hands if not wearing fire-insulated gloves
	if(on)
		var/prot = 0
		var/mob/living/carbon/human/H = user

		if(istype(H))

			if(H.gloves)
				var/obj/item/clothing/gloves/G = H.gloves
				if(G.max_heat_protection_temperature)
					prot = (G.max_heat_protection_temperature > 360)
		else
			prot = 1

		if(prot > 0)
			user << "<span class='notice'>You remove the light [fitting].</span>"
		else if(istype(user) && user.dna.check_mutation(TK))
			user << "<span class='notice'>You telekinetically remove the light [fitting].</span>"
		else
			user << "<span class='warning'>You try to remove the light [fitting], but you burn your hand on it!</span>"

			var/obj/item/organ/limb/affecting = H.get_organ("[user.hand ? "l" : "r" ]_arm")
			if(affecting.take_damage( 0, 5 ))		// 5 burn damage
				H.update_damage_overlays(0)
			H.updatehealth()
			return				// if burned, don't remove the light
	else
		user << "<span class='notice'>You remove the light [fitting].</span>"
	// create a light tube/bulb item and put it in the user's hand
	var/obj/item/weapon/light/L = new light_type()
	L.status = status
	L.rigged = rigged
	L.brightness = brightness

	// light item inherits the switchcount, then zero it
	L.switchcount = switchcount
	switchcount = 0

	L.update()
	L.add_fingerprint(user)
	L.loc = loc

	user.put_in_active_hand(L)	//puts it in our active hand

	status = LIGHT_EMPTY
	update()

/obj/machinery/light/attack_tk(mob/user)
	if(status == LIGHT_EMPTY)
		user << "There is no [fitting] in this light."
		return

	user << "<span class='notice'>You telekinetically remove the light [fitting].</span>"
	// create a light tube/bulb item and put it in the user's hand
	var/obj/item/weapon/light/L = new light_type()
	L.status = status
	L.rigged = rigged
	L.brightness = brightness

	// light item inherits the switchcount, then zero it
	L.switchcount = switchcount
	switchcount = 0

	L.update()
	L.add_fingerprint(user)
	L.loc = loc

	status = LIGHT_EMPTY
	update()

// break the light and make sparks if was on

/obj/machinery/light/proc/broken(skip_sound_and_sparks = 0)
	if(status == LIGHT_EMPTY)
		return

	if(!skip_sound_and_sparks)
		if(status == LIGHT_OK || status == LIGHT_BURNED)
			playsound(src.loc, 'sound/effects/Glasshit.ogg', 75, 1)
		if(on)
			var/datum/effect_system/spark_spread/s = new /datum/effect_system/spark_spread
			s.set_up(3, 1, src)
			s.start()
	status = LIGHT_BROKEN
	update()

/obj/machinery/light/proc/fix()
	if(status == LIGHT_OK)
		return
	status = LIGHT_OK
	brightness = initial(brightness)
	on = 1
	update()

// explosion effect
// destroy the whole light fixture or just shatter it

/obj/machinery/light/ex_act(severity, target)
	..()
	if(!qdeleted(src))
		switch(severity)
			if(2)
				if(prob(50))
					broken()
			if(3)
				if(prob(25))
					broken()

// called when area power state changes
/obj/machinery/light/power_change()
	var/area/A = get_area(src)
	A = A.master
	seton(A.lightswitch && A.power_light)

// called when on fire

/obj/machinery/light/temperature_expose(datum/gas_mixture/air, exposed_temperature, exposed_volume)
	if(prob(max(0, exposed_temperature - 673)))   //0% at <400C, 100% at >500C
		broken()

// explode the light

/obj/machinery/light/proc/explode()
	set waitfor = 0
	var/turf/T = get_turf(src.loc)
	broken()	// break it first to give a warning
	sleep(2)
	explosion(T, 0, 0, 2, 2)
	sleep(1)
	qdel(src)

// the light item
// can be tube or bulb subtypes
// will fit into empty /obj/machinery/light of the corresponding type

/obj/item/weapon/light
	icon = 'icons/obj/lighting.dmi'
	force = 2
	throwforce = 5
	w_class = 1
	var/status = 0		// LIGHT_OK, LIGHT_BURNED or LIGHT_BROKEN
	var/base_state
	var/switchcount = 0	// number of times switched
	materials = list(MAT_METAL=60)
	var/rigged = 0		// true if rigged to explode
	var/brightness = 2 //how much light it gives off

/obj/item/weapon/light/tube
	name = "light tube"
	desc = "A replacement light tube."
	icon_state = "ltube"
	base_state = "ltube"
	item_state = "c_tube"
	materials = list(MAT_GLASS=100)
	brightness = 8

/obj/item/weapon/light/bulb
	name = "light bulb"
	desc = "A replacement light bulb."
	icon_state = "lbulb"
	base_state = "lbulb"
	item_state = "contvapour"
	materials = list(MAT_GLASS=100)
	brightness = 4

/obj/item/weapon/light/throw_impact(atom/hit_atom)
	..()
	shatter()

// update the icon state and description of the light

/obj/item/weapon/light/proc/update()
	switch(status)
		if(LIGHT_OK)
			icon_state = base_state
			desc = "A replacement [name]."
		if(LIGHT_BURNED)
			icon_state = "[base_state]-burned"
			desc = "A burnt-out [name]."
		if(LIGHT_BROKEN)
			icon_state = "[base_state]-broken"
			desc = "A broken [name]."


/obj/item/weapon/light/New()
	..()
	update()


// attack bulb/tube with object
// if a syringe, can inject plasma to make it explode
/obj/item/weapon/light/attackby(obj/item/I, mob/user, params)
	..()
	if(istype(I, /obj/item/weapon/reagent_containers/syringe))
		var/obj/item/weapon/reagent_containers/syringe/S = I

		user << "<span class='notice'>You inject the solution into \the [src].</span>"

		if(S.reagents.has_reagent("plasma", 5))

			rigged = 1

		S.reagents.clear_reagents()
	else
		..()
	return

// called after an attack with a light item
// shatter light, unless it was an attempt to put it in a light socket
// now only shatter if the intent was harm

/obj/item/weapon/light/afterattack(atom/target, mob/user,proximity)
	if(!proximity) return
	if(istype(target, /obj/machinery/light))
		return
	if(user.a_intent != "harm")
		return

	shatter()

/obj/item/weapon/light/proc/shatter()
	if(status == LIGHT_OK || status == LIGHT_BURNED)
		src.visible_message("<span class='danger'>[name] shatters.</span>","<span class='italics'>You hear a small glass object shatter.</span>")
		status = LIGHT_BROKEN
		force = 5
		playsound(src.loc, 'sound/effects/Glasshit.ogg', 75, 1)
		update()