vgstation13/code/game/gamemodes/meteor/meteors.dm

#define METEOR_TEMPERATURE

/var/meteor_wave_delay = 300 //Default wait between waves in tenths of seconds
/var/meteors_in_wave = 10 //Default absolute size
/var/meteor_wave_active = 0
/var/max_meteor_size = 0 //One for small waves, two for big waves, three for massive waves, four for boss waves
/var/chosen_dir = 1

//Call above constants to change
/proc/meteor_wave(var/number = meteors_in_wave, var/max_size = 0, var/list/types = null, var/offset_origin = 0, var/offset_dest = 0)

	if(!ticker || meteor_wave_active)
		return
	meteor_wave_active = 1
	meteor_wave_delay = (rand(30, 45)) * 10 //Between 30 and 45 seconds, engineers need time to shuffle in relative safety
	chosen_dir = pick(cardinal) //Pick a direction
	max_meteor_size = max_size
	//Generate a name for our wave
	var/greek_alphabet = list("Alpha", "Beta", "Delta", "Epsilon", "Zeta", "Eta", "Theta", "Iota", "Kappa", "Lambda", "Mu", \
						 "Nu", "Xi", "Omicron", "Pi", "Rho", "Sigma", "Tau", "Upsilon", "Phi", "Chi", "Psi", "Omega")
	var/wave_final_name = "[number > 25 ? "Major":"Minor"] Meteor [pick("Wave", "Cluster", "Group")] [pick(greek_alphabet)]-[rand(1, 999)]"
	output_information(meteor_wave_delay, chosen_dir, max_size, number, wave_final_name)
	spawn(meteor_wave_delay)
		for(var/i = 0 to number)
			sleep(rand(1, 3)) //0.1 to 0.3 seconds between meteors
			var/meteor_type = null
			if(types != null)
				meteor_type = pick(types)
			spawn_meteor(chosen_dir, meteor_type, offset_origin, offset_dest)
		sleep(50) //Five seconds for the chat to scroll
		meteor_wave_active = 0
	return chosen_dir

//A bunch of information to be used by the bhangmeter (doubles as a meteor monitoring computer), and sent to the admins otherwise
/proc/output_information(var/meteor_delay, var/wave_dir, var/meteor_size, var/wave_size, var/wave_name)

	var/meteor_l_size = "unknown"
	switch(meteor_size)
		if(1)
			meteor_l_size = "small"
		if(2)
			meteor_l_size = "medium"
		if(3)
			meteor_l_size = "large"
		if(4)
			meteor_l_size = "apocalyptic"
		else
			meteor_l_size = "unknown"
	var/wave_l_dir = "north"
	switch(wave_dir)
		if(1)
			wave_l_dir = "north"
		if(2)
			wave_l_dir = "south"
		if(4)
			wave_l_dir = "east"
		if(8)
			wave_l_dir = "west"

	message_admins("[wave_name], containing [wave_size] objects up to [meteor_l_size] size and incoming from the [wave_l_dir], will strike in [meteor_delay/10] seconds.")

	//Send to all Bhangmeters
	for(var/obj/machinery/computer/bhangmeter/bhangmeter in doppler_arrays)
		if(bhangmeter && !bhangmeter.stat)
			bhangmeter.say("Detected: [wave_name], containing [wave_size] objects up to [meteor_l_size] size and incoming from the [wave_l_dir], will strike in [meteor_delay/10] seconds.")

/proc/spawn_meteor(var/chosen_dir, var/meteorpath = null, var/offset_origin = 0, var/offset_dest = 0)

	var/startx
	var/starty
	var/endx
	var/endy
	var/turf/pickedstart
	var/turf/pickedgoal
	var/max_i = 5 //Try only five times maximum

	do
		switch(chosen_dir)

			if(1) //North, along the y = max edge
				starty = world.maxy - (TRANSITIONEDGE + 2)
				startx = rand((TRANSITIONEDGE + 2 + offset_origin), world.maxx - (TRANSITIONEDGE + 2 + offset_origin))
				endy = TRANSITIONEDGE
				endx = rand(TRANSITIONEDGE + offset_dest, world.maxx - TRANSITIONEDGE - offset_dest)

			if(2) //South, along the y = 0 edge
				starty = (TRANSITIONEDGE + 2)
				startx = rand((TRANSITIONEDGE + 2 + offset_origin), world.maxx - (TRANSITIONEDGE + 2 + offset_origin))
				endy = world.maxy - (TRANSITIONEDGE + 2)
				endx = rand(TRANSITIONEDGE + offset_dest, world.maxx - TRANSITIONEDGE - offset_dest)

			if(4) //East, along the x = max edge
				starty = rand((TRANSITIONEDGE + 2 + offset_origin), world.maxy - (TRANSITIONEDGE + 2 + offset_origin))
				startx = world.maxx - (TRANSITIONEDGE + 2)
				endy = rand(TRANSITIONEDGE + offset_dest, world.maxy - TRANSITIONEDGE - offset_dest)
				endx = (TRANSITIONEDGE + 2)

			if(8) //West, along the x = 0 edge
				starty = rand((TRANSITIONEDGE + 2 + offset_origin), world.maxy - (TRANSITIONEDGE + 2 + offset_origin))
				startx = (TRANSITIONEDGE + 2)
				endy = rand(TRANSITIONEDGE + offset_dest, world.maxy - TRANSITIONEDGE - offset_dest)
				endx = world.maxx - (TRANSITIONEDGE + 2)

		pickedstart = locate(startx, starty, 1)
		pickedgoal = locate(endx, endy, 1)
		max_i--
		if(max_i <= 0)
			return
	while(!istype(pickedstart, /turf/space))
	
	if(meteorpath)
		return new meteorpath(pickedstart, pickedgoal)
	else
		var/list/possible_meteors = list()
		if(!max_meteor_size || max_meteor_size >= 1) //Small waves
			possible_meteors[/obj/item/projectile/meteor/small] = 80
			possible_meteors[/obj/item/projectile/meteor/small/flash] = 8
		if(!max_meteor_size || max_meteor_size >= 2) //Medium waves
			possible_meteors[/obj/item/projectile/meteor] = 100
			possible_meteors[/obj/item/projectile/meteor/radioactive] = 10
		if(!max_meteor_size || max_meteor_size >= 3) //Big waves
			possible_meteors[/obj/item/projectile/meteor/big] = 10
			possible_meteors[/obj/item/projectile/meteor/big/cluster] = 1
		var/chosen = pick(possible_meteors)
		return new chosen(pickedstart, pickedgoal)

/*
 * Below are all meteor types
 */

/obj/item/projectile/meteor
	name = "meteor"
	icon = 'icons/obj/meteor.dmi'
	icon_state = "medium"
	density = 1
	anchored = 1 //You can't push or pull it to prevent exploiting
	grillepasschance = 0
	mouse_opacity = 1

/obj/item/projectile/meteor/New(atom/start, atom/end)
	..()
	if(end)
		throw_at(end)

/obj/item/projectile/meteor/throw_at(atom/end)
	original = end
	starting = loc
	current = loc
	OnFired()
	yo = target.y - y
	xo = target.x - x
	process()

//Since meteors explode on impact, we won't allow chain reactions like this
//Maybe one day I wil code explosive recoil, but in the meantime who bombs meteor waves anyways ?
/obj/item/projectile/meteor/ex_act()

	return

//We don't want meteors to bump into eachother and explode, so they pass through eachother
//Reflection on bumping would be better, but I would reckon I'm not sure on how to achieve it
/obj/item/projectile/meteor/Cross(atom/movable/mover, turf/target, height = 1.5, air_group = 0)

	if(istype(mover, /obj/item/projectile/meteor))
		return 1 //Just move through it, no questions asked
	if(isliving(mover))
		return 0 //Collision
	else
		return ..() //Refer to atom/proc/Cross

/obj/item/projectile/meteor/to_bump(atom/A)

	if(loc == null)
		return

	explosion(get_turf(src), 2, 4, 6, 8, 0, 1, 0) //Medium meteor, medium boom
	qdel(src)

/obj/item/projectile/meteor/process_step()
	if(z != starting.z)
		qdel(src)
		return
	..()

/obj/item/projectile/meteor/radioactive
	name = "radioactive meteor"
	desc = "The Engineer's bane"
	icon_state = "medium_radioactive"

/obj/item/projectile/meteor/radioactive/to_bump(atom/a)

	if(loc == null)
		return

	for(var/mob/living/M in viewers(src, null))
		M.apply_radiation(rand(5, 10), RAD_EXTERNAL)

	..()

/obj/item/projectile/meteor/small
	name = "small meteor"
	desc = "The mineral version of armed C4, coming right for your walls."
	icon_state = "small"
	pass_flags = PASSTABLE

/obj/item/projectile/meteor/small/to_bump(atom/A)
	if(loc == null)
		return

	explosion(get_turf(src), -1, 1, 3, 4, 0, 1, 0) //Tiny meteor doesn't cause too much damage
	qdel(src)

/obj/item/projectile/meteor/small/flash
	name = "flash meteor"
	desc = "A absolutely stunning rock specimen of blinding beauty."
	icon_state = "small_flash"

/obj/item/projectile/meteor/small/flash/to_bump(atom/A)

	if(loc == null)
		return

	//Adjusted from flashbangs, should be its own global proc
	visible_message("<span class='danger'>BANG</span>")
	playsound(src, 'sound/effects/bang.ogg', 25, 1)

	for(var/mob/living/M in viewers(src, null))

		//Checking for protections
		var/eye_safety = 0
		var/ear_safety = 0
		if(iscarbon(M))
			var/mob/living/carbon/C = M
			eye_safety = C.eyecheck()
			if(ishuman(C))
				var/mob/living/carbon/human/H = C
				if(H.earprot())
					ear_safety += 2
				if(M_HULK in H.mutations)
					ear_safety += 1
				if(istype(H.head, /obj/item/clothing/head/helmet))
					ear_safety += 1

		//Flashing everyone
		if(eye_safety < 2)
			M.flash_eyes(visual = 1)
			switch(eye_safety)
				if(1)
					M.Stun(2)
				if(0)
					M.Stun(4)
					M.Knockdown(10)
				if(-1)
					M.Stun(7)
					M.Knockdown(15)

		if(ear_safety < 2)
			switch(ear_safety)
				if(1)
					M.ear_damage += rand(0, 3)
				if(0)
					M.ear_damage += rand(5, 15)
					M.ear_deaf = max(M.ear_deaf, 10)
			//Shouldn't have to do this here, this is what life.dm and organ checks are for
			//Not even going to bother with eye damage
			if(prob(M.ear_damage - 10 + 5))
				to_chat(M, "<span class='warning'>You can't hear anything!</span>")
				M.sdisabilities |= DEAF

	explosion(get_turf(src), -1, 1, 3, 4, 0, 1, 0) //Tiny meteor doesn't cause too much damage
	qdel(src)

/obj/item/projectile/meteor/piercing
	name = "piercing meteor"
	desc = "Takes a page out of armor-piercing rounds, blowing its way through cover once, and then blowing up normally."
	icon_state = "medium_piercing"
	var/pierce_health = 1 //When 0, piercing meteor explodes like normal

/obj/item/projectile/meteor/piercing/to_bump(atom/A)

	if(loc == null)
		return

	if(pierce_health)
		explosion(get_turf(A), 1, 0, 0, 0, 0, 1, 0) //Blow up the resisting object
		pierce_health--
	else
		explosion(get_turf(src), 2, 4, 6, 8, 0, 1, 0) //Blow ourselves up, in glory
		qdel(src)

/obj/item/projectile/meteor/big
	name = "large meteor"
	desc = "It might look large, but it is only a small splinter of a much bigger thing."
	icon_state = "big"

/obj/item/projectile/meteor/big/to_bump(atom/A)

	if(loc == null)
		return

	explosion(get_turf(src), 4, 6, 8, 8, 0, 1, 0) //You have been visited by the nuclear meteor
	qdel(src)

/obj/item/projectile/meteor/big/cluster
	name = "cluster meteor"
	desc = "Makes up for its lack of explosiveness by splitting into multiple, fairly explosive meteors."
	icon_state = "big_cluster"

/obj/item/projectile/meteor/big/cluster/to_bump(atom/A)

	if(loc == null)
		return

	explosion(get_turf(A), 1, 0, 0, 0, 0, 1, 0) //Enough to destroy whatever was in the way
	for(var/i = 0, i < 3, i++)
		var/c_endx = rand(TRANSITIONEDGE, world.maxx - TRANSITIONEDGE)
		var/c_endy = rand(TRANSITIONEDGE, world.maxy - TRANSITIONEDGE)
		var/c_pickedgoal = locate(c_endx, c_endy, 1)
		if(c_pickedgoal)
			new /obj/item/projectile/meteor(get_turf(src), c_pickedgoal)
	qdel(src)

//Placeholder for actual meteors of this kind, will be included SOON
/obj/item/projectile/meteor/boss
	name = "apocalytic meteor"
	desc = "And behold, a white meteor. And on that meteor..."

/obj/item/projectile/meteor/attackby(obj/item/weapon/W as obj, mob/user as mob)
	if(istype(W, /obj/item/weapon/pickaxe)) //Yeah, you can totally do that
		qdel(src)
		return
	..()

/obj/item/projectile/meteor/Destroy()
	..()

/obj/item/projectile/meteor/gib    //non explosive meteor, appears to be a corpse spinning in space before impacting something and spraying gibs everywhere
	name = "human corpse"
	icon_state = "human"

/obj/item/projectile/meteor/gib/to_bump(atom/A)

	if(loc == null)
		return

	new /obj/effect/gibspawner/human(src.loc)
	qdel(src)


/obj/item/projectile/meteor/blob
	name = "Blob"
	icon = 'icons/obj/meteor_64x64.dmi'
	icon_state = "meteorblob"
	pixel_x = -16 * PIXEL_MULTIPLIER
	pixel_y = -16 * PIXEL_MULTIPLIER

/obj/item/projectile/meteor/blob/to_bump(atom/A)
	if(!loc)
		return

	if(ismob(A))
		src.forceMove(A.loc)
		A.blob_act()
		return

	playsound(loc, get_sfx("explosion"), 50)

	for (var/mob/M in player_list)
		if(M && M.client)
			var/turf/M_turf = get_turf(M)
			if(M_turf && (M_turf.z == loc.z))
				var/dist = get_dist(M_turf, loc)
				if(dist <= round(world.view + 10, 1))
					shake_camera(M, 3, 2)
				M.playsound_local(loc, 'sound/effects/explosionfar.ogg')

	var/turf/T = get_turf(A)

	for(var/atom/AT in T)
		AT.blob_act(1)

	T.blob_act(1)

	var/obj/effect/blob/is_there_a_blob = (locate(/obj/effect/blob) in T)

	if(is_there_a_blob)
		do_blob_stuff(loc)
	else
		do_blob_stuff(T)

	qdel(src)

/obj/item/projectile/meteor/blob/proc/do_blob_stuff(var/turf/T)
	new/obj/effect/blob/normal(T, no_morph = 1)

/obj/item/projectile/meteor/blob/node
	name = "Blob Node"
	icon = 'icons/obj/meteor_64x64.dmi'
	icon_state = "meteornode"

/obj/item/projectile/meteor/blob/node/do_blob_stuff(var/turf/T)
	new/obj/effect/blob/node(T, no_morph = 1)

var/list/blob_candidates = list()

/obj/item/projectile/meteor/blob/core
	name = "Blob Core"
	icon = 'icons/obj/meteor_64x64.dmi'
	icon_state = "meteorcore"
	var/client/blob_candidate = null

/obj/item/projectile/meteor/blob/core/proc/AssignMob(var/mob/M)
	blob_candidate = M.client
	if(blob_candidate)
		blob_candidate.perspective = EYE_PERSPECTIVE
		blob_candidate.eye = src
		blob_candidate.mob.see_invisible = SEE_INVISIBLE_MINIMUM

/obj/item/projectile/meteor/blob/core/Destroy()
	if(blob_candidate)
		blob_candidate.perspective = MOB_PERSPECTIVE
		blob_candidate.eye = blob_candidate.mob
		blob_candidates -= blob_candidate
		blob_candidate = null
	..()

/obj/item/projectile/meteor/blob/core/do_blob_stuff(var/turf/T)
	if(blob_candidate && istype(blob_candidate.mob, /mob/dead/observer))
		new/obj/effect/blob/core(T, new_overmind = blob_candidate, no_morph = 1)
	else
		new/obj/effect/blob/core(T, no_morph = 1)
	log_admin("Blob core meteor impacted at [formatJumpTo(loc)] controlled by [key_name(blob_candidate)].")
	message_admins("Blob core meteor impacted at [formatJumpTo(loc)] controlled by [key_name(blob_candidate)].")

//It's a tool to debug and test stuff, ok? Pls don't hand them out to players unless you just want to set the world on fire.
/obj/item/weapon/meteor_gun
	name = "Meteor Gun"
	desc = "Jesus fucking christ."
	icon = 'icons/obj/gun.dmi'
	icon_state = "meteorgun"
	item_state = "gun"
	flags = FPRINT
	siemens_coefficient = 1
	slot_flags = SLOT_BELT
	w_class = W_CLASS_MEDIUM
	throwforce = 5
	throw_speed = 4
	throw_range = 5
	force = 5.0
	var/projectile_type = /obj/item/projectile/meteor

/obj/item/weapon/meteor_gun/afterattack(atom/A, mob/living/user, flag, params, struggle = 0)
	if(flag)
		return //we're placing gun on a table or in backpack

	user.visible_message(
		"<span class='warning'>[user] fires the [src]!</span>",
		"<span class='warning'>You fire the [src]!</span>")

	playsound(user, 'sound/weapons/rocket.ogg', 100)

	var/obj/item/projectile/meteor/in_chamber = new projectile_type(get_turf(src), get_turf(A))

	add_logs(user,A,"fired \the [src] (proj:[in_chamber.name]) at ",addition="([A.x],[A.y],[A.z])")

/obj/item/weapon/meteor_gun/attack_self(mob/user as mob)
	projectile_type = input(user, "Pick a meteor type.", "Projectile Choice") in typesof(/obj/item/projectile/meteor)


/obj/item/projectile/meteor/firework
	name = "firework"
	desc = "Oooh! Aaaaah"
	icon_state = "firework"

/obj/item/projectile/meteor/firework/New()
	..()
	var/list/colors = list(
		list(1, 0, 0, 1),
		list(0, 1, 0, 1),
		list(0, 0, 1, 1),
		list(1, 1, 0, 1),
		list(0, 1, 1, 1),
		list(1, 0, 1, 1)
	)
	var/list/cl = list(0,0,0,0)
	for(var/x = 1 to 4)
		cl = pick(colors) + cl
	color = cl

/obj/item/projectile/meteor/firework/to_bump(atom/A)
	if(!loc)
		return

	explosion(get_turf(src),0,0,0)
	new /obj/effect/overlay/firework_sparkle(get_turf(src))
	qdel(src)

/obj/effect/overlay/firework_sparkle
	name = "pretty lights"
	desc = "Shiny."
	icon = 'icons/obj/meteor_64x64.dmi'
	icon_state = "firework_sparkle"
	pixel_x = -16 * PIXEL_MULTIPLIER
	pixel_y = -16 * PIXEL_MULTIPLIER
	plane = LIGHTING_PLANE
	layer = ABOVE_LIGHTING_LAYER

/obj/effect/overlay/firework_sparkle/New()
	..()
	var/list/colors = list(
		list(1, 0, 0, 1),
		list(0, 1, 0, 1),
		list(0, 0, 1, 1),
		list(1, 1, 0, 1),
		list(0, 1, 1, 1),
		list(1, 0, 1, 1)
	)
	var/list/cl = list(0,0,0,0)
	for(var/x = 1 to 4)
		cl = pick(colors) + cl
	color = cl
	set_light(12,12)

	var/matrix/M = src.transform
	if(!istype(M))
		M = matrix()
	var/scaleby = rand(1,2)
	M.Scale(scaleby, scaleby)

	animate(src, transform = M, alpha = 0, time = 12)
	spawn(12)
		qdel(src)