// the SMES
// stores power

#define SMESMAXCHARGELEVEL 200000
#define SMESMAXOUTPUT 200000

/obj/machinery/power/smes
	name = "power storage unit"
	desc = "A high-capacity superconducting magnetic energy storage (SMES) unit."
	icon_state = "smes"
	density = 1
	anchored = 1
	use_power = 0
	var/output = 50000
	var/lastout = 0
	var/loaddemand = 0
	var/capacity = 5e6
	var/charge = 1e6
	var/charging = 0
	var/chargemode = 0
	var/chargecount = 0
	var/chargelevel = 50000
	var/online = 1
	var/name_tag = null
	var/obj/machinery/power/terminal/terminal = null
	//Holders for powerout event.
	var/last_output = 0
	var/last_charge = 0
	var/last_online = 0

/obj/machinery/power/smes/New()
	..()
	spawn(5)
		dir_loop:
			for(var/d in cardinal)
				var/turf/T = get_step(src, d)
				for(var/obj/machinery/power/terminal/term in T)
					if(term && term.dir == turn(d, 180))
						terminal = term
						break dir_loop
		if(!terminal)
			stat |= BROKEN
			return
		terminal.master = src
		updateicon()
	return


/obj/machinery/power/smes/proc/updateicon()
	overlays.Cut()
	if(stat & BROKEN)	return

	overlays += image('icons/obj/power.dmi', "smes-op[online]")

	if(charging)
		overlays += image('icons/obj/power.dmi', "smes-oc1")
	else
		if(chargemode)
			overlays += image('icons/obj/power.dmi', "smes-oc0")

	var/clevel = chargedisplay()
	if(clevel>0)
		overlays += image('icons/obj/power.dmi', "smes-og[clevel]")
	return


/obj/machinery/power/smes/proc/chargedisplay()
	return round(5.5*charge/(capacity ? capacity : 5e6))

#define SMESRATE 0.05			// rate of internal charge to external power


/obj/machinery/power/smes/process()

	if(stat & BROKEN)	return

	//store machine state to see if we need to update the icon overlays
	var/last_disp = chargedisplay()
	var/last_chrg = charging
	var/last_onln = online

	if(terminal)
		var/excess = terminal.surplus()

		if(charging)
			if(excess >= 0)		// if there's power available, try to charge

				var/load = min((capacity-charge)/SMESRATE, chargelevel)		// charge at set rate, limited to spare capacity

				charge += load * SMESRATE	// increase the charge

				add_load(load)		// add the load to the terminal side network

			else					// if not enough capcity
				charging = 0		// stop charging
				chargecount  = 0

		else
			if(chargemode)
				if(chargecount > rand(3,6))
					charging = 1
					chargecount = 0

				if(excess > chargelevel)
					chargecount++
				else
					chargecount = 0
			else
				chargecount = 0

	if(online)		// if outputting
		lastout = min( charge/SMESRATE, output)		//limit output to that stored

		charge -= lastout*SMESRATE		// reduce the storage (may be recovered in /restore() if excessive)

		add_avail(lastout)				// add output to powernet (smes side)

		if(charge < 0.0001)
			online = 0					// stop output if charge falls to zero

	// only update icon if state changed
	if(last_disp != chargedisplay() || last_chrg != charging || last_onln != online)
		updateicon()

	return

// called after all power processes are finished
// restores charge level to smes if there was excess this ptick


/obj/machinery/power/smes/proc/restore()
	if(stat & BROKEN)
		return

	if(!online)
		loaddemand = 0
		return

	var/excess = powernet.netexcess		// this was how much wasn't used on the network last ptick, minus any removed by other SMESes

	excess = min(lastout, excess)				// clamp it to how much was actually output by this SMES last ptick

	excess = min((capacity-charge)/SMESRATE, excess)	// for safety, also limit recharge by space capacity of SMES (shouldn't happen)

	// now recharge this amount

	var/clev = chargedisplay()

	charge += excess * SMESRATE
	powernet.netexcess -= excess		// remove the excess from the powernet, so later SMESes don't try to use it

	loaddemand = lastout-excess

	if(clev != chargedisplay() )
		updateicon()
	return


/obj/machinery/power/smes/add_load(var/amount)
	if(terminal && terminal.powernet)
		terminal.powernet.newload += amount


/obj/machinery/power/smes/attack_ai(mob/user)
	add_fingerprint(user)
	ui_interact(user)


/obj/machinery/power/smes/attack_hand(mob/user)
	add_fingerprint(user)
	ui_interact(user)
	
	
/obj/machinery/power/smes/ui_interact(mob/user, ui_key = "main", var/datum/nanoui/ui = null)

	if(stat & BROKEN) 
		return

	// this is the data which will be sent to the ui
	var/data[0]
	data["nameTag"] = name_tag
	data["storedCapacity"] = round(100.0*charge/capacity, 0.1)
	data["charging"] = charging
	data["chargeMode"] = chargemode
	data["chargeLevel"] = chargelevel
	data["chargeMax"] = SMESMAXCHARGELEVEL
	data["outputOnline"] = online
	data["outputLevel"] = output
	data["outputMax"] = SMESMAXOUTPUT
	data["outputLoad"] = round(loaddemand)

	// update the ui if it exists, returns null if no ui is passed/found
	ui = nanomanager.try_update_ui(user, src, ui_key, ui, data)	
	if (!ui)
		// the ui does not exist, so we'll create a new() one
        // for a list of parameters and their descriptions see the code docs in \code\modules\nano\nanoui.dm
		ui = new(user, src, ui_key, "smes.tmpl", "SMES Power Storage Unit", 540, 380)
		// when the ui is first opened this is the data it will use
		ui.set_initial_data(data)		
		// open the new ui window
		ui.open()
		// auto update every Master Controller tick
		ui.set_auto_update(1)
		

/obj/machinery/power/smes/Topic(href, href_list)
	..()

	if (usr.stat || usr.restrained() )
		return
	if (!(istype(usr, /mob/living/carbon/human) || ticker) && ticker.mode.name != "monkey")
		if(!istype(usr, /mob/living/silicon/ai))
			usr << "\red You don't have the dexterity to do this!"
			return

//world << "[href] ; [href_list[href]]"

	if (!istype(src.loc, /turf) && !istype(usr, /mob/living/silicon/))
		return 0 // Do not update ui

	if( href_list["cmode"] )
		chargemode = !chargemode
		if(!chargemode)
			charging = 0
		updateicon()

	else if( href_list["online"] )
		online = !online
		updateicon()
	else if( href_list["input"] )
		switch( href_list["input"] )
			if("min")
				chargelevel = 0
			if("max")
				chargelevel = SMESMAXCHARGELEVEL		//30000
			if("set")
				chargelevel = input(usr, "Enter new input level (0-[SMESMAXCHARGELEVEL])", "SMES Input Power Control", chargelevel) as num
		chargelevel = max(0, min(SMESMAXCHARGELEVEL, chargelevel))	// clamp to range

	else if( href_list["output"] )
		switch( href_list["output"] )
			if("min")
				output = 0
			if("max")
				output = SMESMAXOUTPUT		//30000
			if("set")
				output = input(usr, "Enter new output level (0-[SMESMAXOUTPUT])", "SMES Output Power Control", output) as num
		output = max(0, min(SMESMAXOUTPUT, output))	// clamp to range

	investigate_log("input/output; [chargelevel>output?"<font color='green'>":"<font color='red'>"][chargelevel]/[output]</font> | Output-mode: [online?"<font color='green'>on</font>":"<font color='red'>off</font>"] | Input-mode: [chargemode?"<font color='green'>auto</font>":"<font color='red'>off</font>"] by [usr.key]","singulo")
	
	return 1
	

/obj/machinery/power/smes/proc/ion_act()
	if(src.z == 1)
		if(prob(1)) //explosion
			world << "\red SMES explosion in [src.loc.loc]"
			for(var/mob/M in viewers(src))
				M.show_message("\red The [src.name] is making strange noises!", 3, "\red You hear sizzling electronics.", 2)
			sleep(10*pick(4,5,6,7,10,14))
			var/datum/effect/effect/system/smoke_spread/smoke = new /datum/effect/effect/system/smoke_spread()
			smoke.set_up(3, 0, src.loc)
			smoke.attach(src)
			smoke.start()
			explosion(src.loc, -1, 0, 1, 3, 0)
			del(src)
			return
		if(prob(15)) //Power drain
			world << "\red SMES power drain in [src.loc.loc]"
			var/datum/effect/effect/system/spark_spread/s = new /datum/effect/effect/system/spark_spread
			s.set_up(3, 1, src)
			s.start()
			if(prob(50))
				emp_act(1)
			else
				emp_act(2)
		if(prob(5)) //smoke only
			world << "\red SMES smoke in [src.loc.loc]"
			var/datum/effect/effect/system/smoke_spread/smoke = new /datum/effect/effect/system/smoke_spread()
			smoke.set_up(3, 0, src.loc)
			smoke.attach(src)
			smoke.start()


/obj/machinery/power/smes/emp_act(severity)
	online = 0
	charging = 0
	output = 0
	charge -= 1e6/severity
	if (charge < 0)
		charge = 0
	spawn(100)
		output = initial(output)
		charging = initial(charging)
		online = initial(online)
	..()



/obj/machinery/power/smes/magical
	name = "magical power storage unit"
	desc = "A high-capacity superconducting magnetic energy storage (SMES) unit. Magically produces power."
	process()
		capacity = INFINITY
		charge = INFINITY
		..()



/proc/rate_control(var/S, var/V, var/C, var/Min=1, var/Max=5, var/Limit=null)
	var/href = "<A href='?src=\ref[S];rate control=1;[V]"
	var/rate = "[href]=-[Max]'>-</A>[href]=-[Min]'>-</A> [(C?C : 0)] [href]=[Min]'>+</A>[href]=[Max]'>+</A>"
	if(Limit) return "[href]=-[Limit]'>-</A>"+rate+"[href]=[Limit]'>+</A>"
	return rate


#undef SMESRATE