GS13NG/code/game/objects/explosion.dm

var/explosionid = 1

/proc/explosion(turf/epicenter, devastation_range, heavy_impact_range, light_impact_range, flash_range, adminlog = 1, ignorecap = 0, flame_range = 0 ,silent = 0, smoke = 1)
	set waitfor = 0
	src = null //so we don't abort once src is deleted
	epicenter = get_turf(epicenter)
	if(!epicenter)
		return

	// Archive the uncapped explosion for the doppler array
	var/orig_dev_range = devastation_range
	var/orig_heavy_range = heavy_impact_range
	var/orig_light_range = light_impact_range

	if(!ignorecap && epicenter.z != ZLEVEL_MINING)
		//Clamp all values to MAX_EXPLOSION_RANGE
		devastation_range = min(MAX_EX_DEVESTATION_RANGE, devastation_range)
		heavy_impact_range = min(MAX_EX_HEAVY_RANGE, heavy_impact_range)
		light_impact_range = min(MAX_EX_LIGHT_RANGE, light_impact_range)
		flash_range = min(MAX_EX_FLASH_RANGE, flash_range)
		flame_range = min(MAX_EX_FLAME_RANGE, flame_range)

	//DO NOT REMOVE THIS SLEEP, IT BREAKS THINGS
	//not sleeping causes us to ex_act() the thing that triggered the explosion
	//doing that might cause it to trigger another explosion
	//this is bad
	//I would make this not ex_act the thing that triggered the explosion,
	//but everything that explodes gives us their loc or a get_turf()
	//and somethings expect us to ex_act them so they can qdel()
	sleep(1) //tldr, let the calling proc call qdel(src) before we explode

	var/id = explosionid++
	var/start = world.timeofday

	var/max_range = max(devastation_range, heavy_impact_range, light_impact_range, flame_range)
	var/list/cached_exp_block = list()

	if(adminlog)
		message_admins("Explosion with size ([devastation_range], [heavy_impact_range], [light_impact_range], [flame_range]) in area [epicenter.loc.name] ([epicenter.x],[epicenter.y],[epicenter.z] - <a href='?_src_=holder;adminplayerobservecoodjump=1;X=[epicenter.x];Y=[epicenter.y];Z=[epicenter.z]'>JMP</a>)")
		log_game("Explosion with size ([devastation_range], [heavy_impact_range], [light_impact_range], [flame_range]) in area [epicenter.loc.name] ([epicenter.x],[epicenter.y],[epicenter.z])")

	// Play sounds; we want sounds to be different depending on distance so we will manually do it ourselves.
	// Stereo users will also hear the direction of the explosion!

	// Calculate far explosion sound range. Only allow the sound effect for heavy/devastating explosions.
	// 3/7/14 will calculate to 80 + 35

	var/far_dist = 0
	far_dist += heavy_impact_range * 5
	far_dist += devastation_range * 20

	if(!silent)
		var/frequency = get_rand_frequency()
		for(var/mob/M in player_list)
			// Double check for client
			if(M && M.client)
				var/turf/M_turf = get_turf(M)
				if(M_turf && M_turf.z == epicenter.z)
					var/dist = get_dist(M_turf, epicenter)
					// If inside the blast radius + world.view - 2
					if(dist <= round(max_range + world.view - 2, 1))
						M.playsound_local(epicenter, get_sfx("explosion"), 100, 1, frequency, falloff = 5) // get_sfx() is so that everyone gets the same sound
					// You hear a far explosion if you're outside the blast radius. Small bombs shouldn't be heard all over the station.
					else if(dist <= far_dist)
						var/far_volume = Clamp(far_dist, 30, 50) // Volume is based on explosion size and dist
						far_volume += (dist <= far_dist * 0.5 ? 50 : 0) // add 50 volume if the mob is pretty close to the explosion
						M.playsound_local(epicenter, 'sound/effects/explosionfar.ogg', far_volume, 1, frequency, falloff = 5)

	//postpone processing for a bit
	var/postponeCycles = max(round(devastation_range/8),1)
	SSlighting.postpone(postponeCycles)
	SSmachine.postpone(postponeCycles)

	if(heavy_impact_range > 1)
		if(smoke)
			var/datum/effect_system/explosion/smoke/E = new/datum/effect_system/explosion/smoke()
			E.set_up(epicenter)
			E.start()
		else
			var/datum/effect_system/explosion/E = new/datum/effect_system/explosion()
			E.set_up(epicenter)
			E.start()

	var/x0 = epicenter.x
	var/y0 = epicenter.y
	var/z0 = epicenter.z

	var/list/affected_turfs = spiral_range_turfs(max_range, epicenter)

	if(config.reactionary_explosions)
		for(var/turf/T in affected_turfs) // we cache the explosion block rating of every turf in the explosion area
			cached_exp_block[T] = 0
			if(T.density && T.explosion_block)
				cached_exp_block[T] += T.explosion_block

			for(var/obj/machinery/door/D in T)
				if(D.density && D.explosion_block)
					cached_exp_block[T] += D.explosion_block

			for(var/obj/structure/window/W in T)
				if(W.reinf && W.fulltile)
					cached_exp_block[T] += W.explosion_block

			for(var/obj/structure/blob/B in T)
				cached_exp_block[T] += B.explosion_block
			CHECK_TICK
			
	//flash mobs
	if(flash_range)
		for(var/mob/living/L in viewers(flash_range, epicenter))
			L.flash_act()

	CHECK_TICK

	var/list/exploded_this_tick = list()	//open turfs that need to be blocked off while we sleep
	for(var/turf/T in affected_turfs)

		if (!T)
			continue
		var/init_dist = cheap_hypotenuse(T.x, T.y, x0, y0)
		var/dist = init_dist

		if(config.reactionary_explosions)
			var/turf/Trajectory = T
			while(Trajectory != epicenter)
				Trajectory = get_step_towards(Trajectory, epicenter)
				dist += cached_exp_block[Trajectory]

		var/flame_dist = 0
		var/throw_dist = dist

		if(dist < flame_range)
			flame_dist = 1

		if(dist < devastation_range)
			dist = 1
		else if(dist < heavy_impact_range)
			dist = 2
		else if(dist < light_impact_range)
			dist = 3
		else
			dist = 0

		//------- EX_ACT AND TURF FIRES -------

		if(T)
			if(flame_dist && prob(40) && !isspaceturf(T) && !T.density)
				new /obj/effect/hotspot(T) //Mostly for ambience!
			if(dist > 0)
				T.explosion_level = max(T.explosion_level, dist)	//let the bigger one have it
				T.explosion_id = id
				T.ex_act(dist)
				exploded_this_tick += T

		//--- THROW ITEMS AROUND ---

		var/throw_dir = get_dir(epicenter,T)
		for(var/obj/item/I in T)
			if(I && !I.anchored)
				var/throw_range = rand(throw_dist, max_range)
				var/turf/throw_at = get_ranged_target_turf(I, throw_dir, throw_range)
				I.throw_speed = 4 //Temporarily change their throw_speed for embedding purposes (Reset when it finishes throwing, regardless of hitting anything)
				I.throw_at(throw_at, throw_range, I.throw_speed)

		if(TICK_CHECK)
			var/circumference = (PI * init_dist * 2) + 8 //+8 to prevent shit gaps
			if(exploded_this_tick.len > circumference)	//only do this every revolution
				for(var/Unexplode in exploded_this_tick)
					var/turf/UnexplodeT = Unexplode
					UnexplodeT.explosion_level = 0
				exploded_this_tick.Cut()

	//unfuck the shit
	for(var/Unexplode in exploded_this_tick)
		var/turf/UnexplodeT = Unexplode
		UnexplodeT.explosion_level = 0
	exploded_this_tick.Cut()

	var/took = (world.timeofday-start)/10
	//You need to press the DebugGame verb to see these now....they were getting annoying and we've collected a fair bit of data. Just -test- changes  to explosion code using this please so we can compare
	if(Debug2)
		world.log << "## DEBUG: Explosion([x0],[y0],[z0])(d[devastation_range],h[heavy_impact_range],l[light_impact_range]): Took [took] seconds."

	//Machines which report explosions.
	for(var/array in doppler_arrays)
		var/obj/machinery/doppler_array/A = array
		A.sense_explosion(epicenter,devastation_range,heavy_impact_range,light_impact_range,took,orig_dev_range,orig_heavy_range,orig_light_range)

	return 1



/proc/secondaryexplosion(turf/epicenter, range)
	for(var/turf/tile in spiral_range_turfs(range, epicenter))
		tile.ex_act(2)


/client/proc/check_bomb_impacts()
	set name = "Check Bomb Impact"
	set category = "Debug"

	var/newmode = alert("Use reactionary explosions?","Check Bomb Impact", "Yes", "No")
	var/turf/epicenter = get_turf(mob)
	if(!epicenter)
		return

	var/dev = 0
	var/heavy = 0
	var/light = 0
	var/list/choices = list("Small Bomb","Medium Bomb","Big Bomb","Custom Bomb")
	var/choice = input("Bomb Size?") in choices
	switch(choice)
		if(null)
			return 0
		if("Small Bomb")
			dev = 1
			heavy = 2
			light = 3
		if("Medium Bomb")
			dev = 2
			heavy = 3
			light = 4
		if("Big Bomb")
			dev = 3
			heavy = 5
			light = 7
		if("Custom Bomb")
			dev = input("Devestation range (Tiles):") as num
			heavy = input("Heavy impact range (Tiles):") as num
			light = input("Light impact range (Tiles):") as num

	var/max_range = max(dev, heavy, light)
	var/x0 = epicenter.x
	var/y0 = epicenter.y
	var/list/wipe_colours = list()
	for(var/turf/T in spiral_range_turfs(max_range, epicenter))
		wipe_colours += T
		var/dist = cheap_hypotenuse(T.x, T.y, x0, y0)

		if(newmode == "Yes")
			var/turf/TT = T
			while(TT != epicenter)
				TT = get_step_towards(TT,epicenter)
				if(TT.density && TT.explosion_block)
					dist += TT.explosion_block

				for(var/obj/machinery/door/D in TT)
					if(D.density && D.explosion_block)
						dist += D.explosion_block

				for(var/obj/structure/window/W in TT)
					if(W.explosion_block && W.fulltile)
						dist += W.explosion_block

				for(var/obj/structure/blob/B in T)
					dist += B.explosion_block

		if(dist < dev)
			T.color = "red"
			T.maptext = "Dev"
		else if (dist < heavy)
			T.color = "yellow"
			T.maptext = "Heavy"
		else if (dist < light)
			T.color = "blue"
			T.maptext = "Light"
		else
			continue

	sleep(100)
	for(var/turf/T in wipe_colours)
		T.color = null
		T.maptext = ""

/proc/dyn_explosion(turf/epicenter, power, flash_range, adminlog = 1, ignorecap = 1, flame_range = 0 ,silent = 0, smoke = 1)
	if(!power)
		return
	var/range = 0
	range = round((2 * power)**DYN_EX_SCALE)
	explosion(epicenter, round(range * 0.25), round(range * 0.5), round(range), flash_range*range, adminlog, ignorecap, flame_range*range, silent, smoke)

// Using default dyn_ex scale:
// 100 explosion power is a (5, 10, 20) explosion.
// 75 explosion power is a (4, 8, 17) explosion.
// 50 explosion power is a (3, 7, 14) explosion.
// 25 explosion power is a (2, 5, 10) explosion.
// 10 explosion power is a (1, 3, 6) explosion.
// 5 explosion power is a (0, 1, 3) explosion.
// 1 explosion power is a (0, 0, 1) explosion.