/spell
	var/name = "Spell"
	var/desc = "A spell"
	parent_type = /datum
	var/panel = "Spells"//What panel the proc holder needs to go on.

	var/school = "evocation" //not relevant at now, but may be important later if there are changes to how spells work. the ones I used for now will probably be changed... maybe spell presets? lacking flexibility but with some other benefit?

	var/charge_type = Sp_RECHARGE //can be recharge or charges, see charge_max and charge_counter descriptions; can also be based on the holder's vars now, use "holder_var" for that

	var/charge_max = 100 //recharge time in deciseconds if charge_type = Sp_RECHARGE or starting charges if charge_type = Sp_CHARGES
	var/charge_counter = 0 //can only cast spells if it equals recharge, ++ each decisecond if charge_type = Sp_RECHARGE or -- each cast if charge_type = Sp_CHARGES
	var/still_recharging_msg = "<span class='notice'>The spell is still recharging.</span>"

	var/silenced = 0 //not a binary - the length of time we can't cast this for

	var/holder_var_type = "bruteloss" //only used if charge_type equals to "holder_var"
	var/holder_var_amount = 20 //same. The amount adjusted with the mob's var when the spell is used

	var/spell_flags = NEEDSCLOTHES
	var/invocation = "HURP DURP"	//what is uttered when the wizard casts the spell
	var/invocation_type = SpI_NONE	//can be none, whisper, shout, and emote
	var/range = 7					//the range of the spell; outer radius for aoe spells
	var/message = ""				//whatever it says to the guy affected by it
	var/selection_type = "view"		//can be "range" or "view"
	var/atom/movable/holder			//where the spell is. Normally the user, can be an item
	var/duration = 0 //how long the spell lasts

	var/list/spell_levels = list(Sp_SPEED = 0, Sp_POWER = 0) //the current spell levels - total spell levels can be obtained by just adding the two values
	var/list/level_max = list(Sp_TOTAL = 4, Sp_SPEED = 4, Sp_POWER = 0) //maximum possible levels in each category. Total does cover both.
	var/cooldown_reduc = 0		//If set, defines how much charge_max drops by every speed upgrade
	var/delay_reduc = 0
	var/cooldown_min = 0 //minimum possible cooldown for a charging spell

	var/overlay = 0
	var/overlay_icon = 'icons/obj/wizard.dmi'
	var/overlay_icon_state = "spell"
	var/overlay_lifespan = 0

	var/sparks_spread = 0
	var/sparks_amt = 0 //cropped at 10
	var/smoke_spread = 0 //1 - harmless, 2 - harmful
	var/smoke_amt = 0 //cropped at 10

	var/critfailchance = 0

	var/cast_delay = 1
	var/cast_sound = ""

	var/hud_state = "" //name of the icon used in generating the spell hud object
	var/override_base = ""

	var/atom/movable/screen/connected_button

///////////////////////
///SETUP AND PROCESS///
///////////////////////

/spell/New()
	..()

	//still_recharging_msg = "<span class='notice'>[name] is still recharging.</span>"
	charge_counter = charge_max

/spell/Destroy()
	QDEL_NULL(connected_button)
	return ..()

/spell/process(delta_time)
	spawn while(charge_counter < charge_max)
		charge_counter++
		sleep(1)
	return

/////////////////
/////CASTING/////
/////////////////

/spell/proc/choose_targets(mob/user = usr) //depends on subtype - see targeted.dm, aoe_turf.dm, dumbfire.dm, or code in general folder
	return

/spell/proc/perform(mob/user = usr, skipcharge = 0) //if recharge is started is important for the trigger spells
	if(!holder)
		holder = user //just in case
	if(!cast_check(skipcharge, user))
		return
	if(cast_delay && !spell_do_after(user, cast_delay))
		return
	var/list/targets = choose_targets(user)
	if(targets && targets.len)
		invocation(user, targets)
		take_charge(user, skipcharge)

		before_cast(targets) //applies any overlays and effects
		user.attack_log += "\[[time_stamp()]\] <font color='red'>[user.real_name] ([user.ckey]) cast the spell [name].</font>"
		if(prob(critfailchance))
			critfail(targets, user)
		else
			cast(targets, user)
		after_cast(targets) //generates the sparks, smoke, target messages etc.


/spell/proc/cast(list/targets, mob/user) //the actual meat of the spell
	return

/spell/proc/critfail(list/targets, mob/user) //the wizman has fucked up somehow
	return

/spell/proc/adjust_var(mob/living/target = usr, type, amount) //handles the adjustment of the var when the spell is used. has some hardcoded types
	switch(type)
		if("bruteloss")
			target.adjustBruteLoss(amount)
		if("fireloss")
			target.adjustFireLoss(amount)
		if("toxloss")
			target.adjustToxLoss(amount)
		if("oxyloss")
			target.adjustOxyLoss(amount)
		if("stunned")
			target.adjust_stunned(20 * amount)
		if("weakened")
			target.adjust_paralyzed(20 * amount)
		if("paralysis")
			target.adjust_unconscious(20 * amount)
		else
			target.vars[type] += amount //I bear no responsibility for the runtimes that'll happen if you try to adjust non-numeric or even non-existant vars
	return

///////////////////////////
/////CASTING WRAPPERS//////
///////////////////////////

/spell/proc/before_cast(list/targets)
	var/valid_targets[0]
	for(var/atom/target in targets)
		// Check range again (fixes long-range EI NATH)
		if(!(target in view_or_range(range,usr,selection_type)))
			continue

		valid_targets += target

		if(overlay)
			var/location
			if(istype(target,/mob/living))
				location = target.loc
			else if(istype(target,/turf))
				location = target
			var/obj/effect/overlay/spell = new /obj/effect/overlay(location)
			spell.icon = overlay_icon
			spell.icon_state = overlay_icon_state
			spell.anchored = 1
			spell.density = 0
			spawn(overlay_lifespan)
				qdel(spell)
	return valid_targets

/spell/proc/after_cast(list/targets)
	for(var/atom/target in targets)
		var/location = get_turf(target)
		if(istype(target,/mob/living) && message)
			to_chat(target, "[message]")
		if(sparks_spread)
			var/datum/effect_system/spark_spread/sparks = new /datum/effect_system/spark_spread()
			sparks.set_up(sparks_amt, 0, location) //no idea what the 0 is
			sparks.start()
		if(smoke_spread)
			if(smoke_spread == 1)
				var/datum/effect_system/smoke_spread/smoke = new /datum/effect_system/smoke_spread()
				smoke.set_up(smoke_amt, 0, location) //no idea what the 0 is
				smoke.start()
			else if(smoke_spread == 2)
				var/datum/effect_system/smoke_spread/bad/smoke = new /datum/effect_system/smoke_spread/bad()
				smoke.set_up(smoke_amt, 0, location) //no idea what the 0 is
				smoke.start()

/////////////////////
////CASTING TOOLS////
/////////////////////
/*Checkers, cost takers, message makers, etc*/

/spell/proc/cast_check(skipcharge = 0,mob/user = usr) //checks if the spell can be cast based on its settings; skipcharge is used when an additional cast_check is called inside the spell

	if(!(src in user.spell_list) && holder == user)
		log_world("[user] utilized the spell '[src]' without having it.")
		to_chat(user, "<span class='warning'>You shouldn't have this spell! Something's wrong.</span>")
		return 0

	if(silenced > 0)
		return

	var/turf/user_turf = get_turf(user)
	if(!user_turf)
		to_chat(user, "<span class='warning'>You cannot cast spells in null space!</span>")

	if(spell_flags & Z2NOCAST && (user_turf.z in (LEGACY_MAP_DATUM).admin_levels)) //Certain spells are not allowed on the CentCom zlevel
		return 0

	if(spell_flags & CONSTRUCT_CHECK)
		for(var/turf/T in range(holder, 1))
			if(findNullRod(T))
				return 0

	if(istype(user, /mob/living/simple_mob) && holder == user)
		var/mob/living/simple_mob/SM = user
		if(SM.purge)
			to_chat(SM, "<span class='warning'>The nullrod's power interferes with your own!</span>")
			return 0

	if(!src.check_charge(skipcharge, user)) //sees if we can cast based on charges alone
		return 0

	if(!(spell_flags & GHOSTCAST) && holder == user)
		if(user.stat && !(spell_flags & STATALLOWED))
			to_chat(usr, "Not when you're incapacitated.")
			return 0

		if(ishuman(user) && !(invocation_type in list(SpI_EMOTE, SpI_NONE)))
			if(user.is_muzzled())
				to_chat(user, "Mmmf mrrfff!")
				return 0

	var/spell/noclothes/spell = locate() in user.spell_list
	if((spell_flags & NEEDSCLOTHES) && !(spell && istype(spell)) && holder == user)//clothes check
		if(!user.wearing_wiz_garb())
			return 0

	return 1

/spell/proc/check_charge(var/skipcharge, mob/user)
	if(!skipcharge)
		switch(charge_type)
			if(Sp_RECHARGE)
				if(charge_counter < charge_max)
					to_chat(user, still_recharging_msg)
					return 0
			if(Sp_CHARGES)
				if(!charge_counter)
					to_chat(user, "<span class='notice'>[name] has no charges left.</span>")
					return 0
	return 1

/spell/proc/take_charge(mob/user = user, var/skipcharge)
	if(!skipcharge)
		switch(charge_type)
			if(Sp_RECHARGE)
				charge_counter = 0 //doesn't start recharging until the targets selecting ends
				src.process()
				return 1
			if(Sp_CHARGES)
				charge_counter-- //returns the charge if the targets selecting fails
				return 1
			if(Sp_HOLDVAR)
				adjust_var(user, holder_var_type, holder_var_amount)
				return 1
		return 0
	return 1

/spell/proc/invocation(mob/user = usr, var/list/targets) //spelling the spell out and setting it on recharge/reducing charges amount

	switch(invocation_type)
		if(SpI_SHOUT)
			if(prob(50))//Auto-mute? Fuck that noise
				user.say(invocation)
			else
				user.say(replacetext(invocation," ","`"))
		if(SpI_WHISPER)
			if(prob(50))
				user.whisper(invocation)
			else
				user.whisper(replacetext(invocation," ","`"))
		if(SpI_EMOTE)
			user.emote("me", 1, invocation) //the 1 means it's for everyone in view, the me makes it an emote, and the invocation is written accordingly.

/////////////////////
///UPGRADING PROCS///
/////////////////////

/spell/proc/can_improve(var/upgrade_type)
	if(level_max[Sp_TOTAL] <= ( spell_levels[Sp_SPEED] + spell_levels[Sp_POWER] )) //too many levels, can't do it
		return 0

	if(upgrade_type && (upgrade_type in spell_levels) && (upgrade_type in level_max))
		if(spell_levels[upgrade_type] >= level_max[upgrade_type])
			return 0

	return 1

/spell/proc/empower_spell()
	return

/spell/proc/quicken_spell()
	if(!can_improve(Sp_SPEED))
		return 0

	spell_levels[Sp_SPEED]++

	if(delay_reduc && cast_delay)
		cast_delay = max(0, cast_delay - delay_reduc)
	else if(cast_delay)
		cast_delay = round( max(0, initial(cast_delay) * ((level_max[Sp_SPEED] - spell_levels[Sp_SPEED]) / level_max[Sp_SPEED] ) ) )

	if(charge_type == Sp_RECHARGE)
		if(cooldown_reduc)
			charge_max = max(cooldown_min, charge_max - cooldown_reduc)
		else
			charge_max = round( max(cooldown_min, initial(charge_max) * ((level_max[Sp_SPEED] - spell_levels[Sp_SPEED]) / level_max[Sp_SPEED] ) ) ) //the fraction of the way you are to max speed levels is the fraction you lose
	if(charge_max < charge_counter)
		charge_counter = charge_max

	var/temp = ""
	name = initial(name)
	switch(level_max[Sp_SPEED] - spell_levels[Sp_SPEED])
		if(3)
			temp = "You have improved [name] into Efficient [name]."
			name = "Efficient [name]"
		if(2)
			temp = "You have improved [name] into Quickened [name]."
			name = "Quickened [name]"
		if(1)
			temp = "You have improved [name] into Free [name]."
			name = "Free [name]"
		if(0)
			temp = "You have improved [name] into Instant [name]."
			name = "Instant [name]"

	return temp

/spell/proc/spell_do_after(var/mob/user as mob, delay as num, var/numticks = 5)
	if(!user || isnull(user))
		return 0
	if(numticks == 0)
		return 1

	var/delayfraction = round(delay/numticks)
	var/Location = user.loc
	var/originalstat = user.stat

	for(var/i = 0, i<numticks, i++)
		sleep(delayfraction)


		if(!user || (!(spell_flags & (STATALLOWED|GHOSTCAST)) && user.stat != originalstat)  || !(user.loc == Location))
			return 0
	return 1

/spell/proc/remove_self(mob/user = usr)
	user.remove_spell(src)