Aurora.3/code/modules/reagents/Chemistry-Reagents.dm

//Chemical Reagents - Initialises all /datum/reagent into a list indexed by reagent id
/proc/initialize_chemical_reagents()
	var/paths = typesof(/datum/reagent) - /datum/reagent
	chemical_reagents_list = list()
	for(var/path in paths)
		var/datum/reagent/D = new path()
		if(!D.name)
			continue
		chemical_reagents_list[D.id] = D


/datum/reagent
	var/name = "Reagent"
	var/id = "reagent"
	var/description = "A non-descript chemical."
	var/taste_description = "old rotten bandaids"
	var/taste_mult = 1 //how this taste compares to others. Higher values means it is more noticable
	var/datum/reagents/holder = null
	var/reagent_state = SOLID
	var/list/data = null
	var/volume = 0
	var/metabolism = REM // This would be 0.2 normally
	var/ingest_met = 0
	var/touch_met = 0
	var/dose = 0
	var/max_dose = 0
	var/overdose = 0
	var/scannable = 0 // Shows up on health analyzers.
	var/affects_dead = 0
	var/glass_icon_state = null
	var/glass_name = null
	var/glass_desc = null
	var/glass_center_of_mass = null
	var/color = "#000000"
	var/color_weight = 1
	var/unaffected_species = IS_DIONA | IS_MACHINE	// Species that aren't affected by this reagent. Does not prevent affect_touch.

/datum/reagent/proc/remove_self(var/amount) // Shortcut
	if (!holder)
		//PROCLOG_WEIRD("Null holder found. Name: [name], id: [id]")
		return

	holder.remove_reagent(id, amount)

// This doesn't apply to skin contact - this is for, e.g. extinguishers and sprays. The difference is that reagent is not directly on the mob's skin - it might just be on their clothing.
/datum/reagent/proc/touch_mob(var/mob/M, var/amount)
	return

/datum/reagent/proc/touch_obj(var/obj/O, var/amount) // Acid melting, cleaner cleaning, etc
	return

/datum/reagent/proc/touch_turf(var/turf/T, var/amount) // Cleaner cleaning, lube lubbing, etc, all go here
	return

/datum/reagent/proc/on_mob_life(var/mob/living/carbon/M, var/alien, var/location) // Currently, on_mob_life is called on carbons. Any interaction with non-carbon mobs (lube) will need to be done in touch_mob.
	if(!istype(M))
		return
	if(!affects_dead && M.stat == DEAD)
		return
	if(alien & unaffected_species && location != CHEM_TOUCH)
		return

	if(!dose && volume)//If dose is currently zero, we do the first effect
		initial_effect(M, alien)

	if(overdose && (dose > overdose) && (location != CHEM_TOUCH))
		overdose(M, alien)
	var/removed = metabolism
	if(ingest_met && (location == CHEM_INGEST))
		removed = ingest_met
	if(touch_met && (location == CHEM_TOUCH))
		removed = touch_met
	removed = min(removed, volume)
	max_dose = max(volume, max_dose)
	dose = min(dose + removed, max_dose)
	//Relaxed this small amount restriction a bit. it gets in the way of gradually digesting creatures
	if(removed >= (metabolism * 0.01) || removed >= 0.01) // If there's too little chemical, don't affect the mob, just remove it
		switch(location)
			if(CHEM_BLOOD)
				affect_blood(M, alien, removed)
			if(CHEM_INGEST)
				affect_ingest(M, alien, removed)
			if(CHEM_TOUCH)
				affect_touch(M, alien, removed)
	remove_self(removed)

//Initial effect is called once when the reagent first starts affecting a mob.
/datum/reagent/proc/initial_effect(var/mob/living/carbon/M, var/alien)
	return

/datum/reagent/proc/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
	return

/datum/reagent/proc/affect_ingest(var/mob/living/carbon/M, var/alien, var/removed)
	affect_blood(M, alien, removed * 0.5)

/datum/reagent/proc/affect_touch(var/mob/living/carbon/M, var/alien, var/removed)
	return

/datum/reagent/proc/overdose(var/mob/living/carbon/M, var/alien) // Overdose effect. Doesn't happen instantly.
	M.adjustToxLoss(REM)

/datum/reagent/proc/initialize_data(var/newdata) // Called when the reagent is created.
	if(!isnull(newdata))
		data = newdata

/datum/reagent/proc/mix_data(var/newdata, var/newamount) // You have a reagent with data, and new reagent with its own data get added, how do you deal with that?
	return

/datum/reagent/proc/get_data() // Just in case you have a reagent that handles data differently.
	if(islist(data))
		return data.Copy()
	else if(data)
		return data

/datum/reagent/Destroy() // This should only be called by the holder, so it's already handled clearing its references
	. = ..()
	holder = null

/* DEPRECATED - TODO: REMOVE EVERYWHERE */

/datum/reagent/proc/reaction_turf(var/turf/target)
	touch_turf(target)

/datum/reagent/proc/reaction_obj(var/obj/target)
	touch_obj(target)

/datum/reagent/proc/reaction_mob(var/mob/target)
	touch_mob(target)