local ini_parts   = itms_manager.ini_parts
parts_list = a_wpo_parts.parts_list
get_config = a_arti_jamming_mcm.get_config
gc = game.translate_string
math_random = math.random
math_floor = math.floor
local jammin = sound_object("wpo\\jammin")

-- Enum for different types of jams
JamType = {
	OK = 0,
	Misfire = 1, -- No discharge
	FailureToEject = 2, -- Discharge
	DoubleFeed = 3, -- Discharge, Need to remove magazine
	Classic = 4, -- Just reload
}

-- associate jammed guns to type of jam
local jammed_guns 	= {}
--[[
	properties:
	id: id of current weapon, if applicable
	has_parts: if weapon has parts or not, determines if rest is filled in
	parts: map of part_name -> condition, same as item_parts, minus barrel
	part_names: list of part names, these are the mechanism parts only. we will take the other parts as needed
	barrel_name: name of barrel in weapon, for barrel specific calculation
	barrel_con: cond of barrel in weapon
	trigger_name: name of trigger
]]
local cgd = {}

local ini_weapon = ini_file("wpo\\weapons\\importer.ltx")

local guarantee_not_jam = 0
-- use to block inputs while animations / unjam logic fires
local unjam_in_progress = false


-------------------
-- SECTION utils --
-------------------

function print_dbg(txt, ...)
	local enable_debug = get_config("debug") or false
	if enable_debug then
		printf("arti_jamming | %s | " .. txt, time_global(), ...)
	end
end

function send_msg(msg)
	if get_config("verbosity") then
		actor_menu.set_msg(1, gc(msg),3)
	end
end

-- export functions
function get_jam_status(id)
	return jammed_guns[id]
end

function set_jam_status(id, status)
	print_dbg("Id %s set to %s", id, status)
	jammed_guns[id] = status
end

function get_jammed(id)
	return jammed_guns[id] and jammed_guns[id] > 0
end

local can_swear = true

--gun jam play swearing sound
function jam_swearing()
	local timeout = get_config("profanity_timeout")
	if timeout and not can_swear then return end
	if get_config("profanity") and math_random(1,100) > 50 then
		local lang = get_config("profanity_language") or "rus"
		utils_obj.play_sound("cutscenes\\"..lang.."\\gun_jam_"..math_random(1,7), 1 )
		if timeout then
			can_swear = false
			CreateTimeEvent("wpo", "reset_swear", 2, reset_swear)
		end
    end
end

function reset_swear()
	can_swear = true
	return true
end

function start_jammin(chance)
	local fun_level = get_config("fun")
	fun_level = tonumber(fun_level)
	print_dbg("fun level: %s", fun_level)
	if fun_level == 0 then 
		return 
	end
	if fun_level == 2 then 
		chance = chance * 2 
	end
	if not jammin:playing() and math.random(100) <= chance then
		jammin.volume = 1
		jammin:play(db.actor, 0, sound_object.s2d)
	end
end

function stop_jammin()
	if jammin:playing() then
		jammin:stop()
	end
end

function is_part(part)
	return parts_list[part]
end

function is_barrel(part)
	return is_part(part) and string.find(part, "barrel")
end
function is_trigger(part)
	return is_part(part) and string.find(part, "trigger")
end

local function parent_section(sec)
	return SYS_GetParam(0, sec,"parent_section") or sec
end

function get_parts_list(wpn)
	if wpn and IsWeapon(wpn) and (not IsMelee(wpn)) and not IsItem("fake_ammo_wpn",sec) then
		local sec = parent_section(wpn:section())
		return ini_parts:r_string_ex("con_parts_list", sec)
	else 
		return nil
	end
end

-- true if item is a firearm with parts
function has_parts(wpn)
	return get_parts_list(wpn) ~= nil
end
 
function sec_has_parts(sec)
	sec = parent_section(sec)
	if sec then
		return string.find(sec, "wpn_") and ini_parts:r_string_ex("con_parts_list", sec)
	else return false
	end
end

function missing_parts(wpn, check_broken)
	local comp = check_broken and -1 or 0
	if wpn:id() == cgd.id then
		if not cgd.has_parts then return false end
		if cgd.barrel_con < comp then return true end
		for k,v in pairs(cgd.parts) do
			if v < comp then return true end
		end
	else
		local parts = item_parts.get_parts_con(wpn, nil, true)
		if not parts or is_empty(parts) then return false end
		for k,v in pairs(parts) do
			if is_part(k) and v < comp then return true end
		end
	end
	return false
end


function play_anim(weapon, anim, sound)
	local length = weapon:play_hud_motion(anim, true, 0, 1, 0)
	print_dbg("playing animation %s for %s time", anim, length)
	if sound then
		utils_obj.play_sound(sound)
	end				
	return length
end


function persist_current_weapon()
	if cgd.id and cgd.has_parts then
		local saved_parts = se_load_var(cgd.id, nil, "parts")
		local copy_parts = {}
		copy_table(saved_parts, copy_parts)
		for k,v in pairs(cgd.parts) do
			copy_parts[k] = v
		end
		copy_parts[cgd.barrel_name] = cgd.barrel_con
		item_parts.set_parts_con(cgd.id, copy_parts)
		print_dbg("Persisted parts for weapon %s", cgd.id)
	end
end

-- current weapon access/update

function update_part(part, cond)
	if cgd.barrel_name == part then
		cgd.barrel_con = cond
	elseif cgd.parts[part] then
		cgd.parts[part] = cond
	end
	persist_current_weapon()
end

function remove_part(part)
	update_part(part, -1)
end

function get_parts()
	local parts = {}
	copy_table(cgd.parts, parts)
	parts[cgd.barrel_name] = cgd.barrel_con
	return parts
end

function current_id()
	return cgd.id
end

function reset_cgd()
	clear_cgd()
	update_current()
end
----------------------------
-- SECTION main functions --
----------------------------
function actor_on_first_update()
	update_current()
end

function clear_cgd()
	empty_table(cgd.parts)
	empty_table(cgd.data)
	empty_table(cgd)
	cgd.id = 0
	cgd.has_parts = false
end

-- update current gun to be gun in hand
function update_current()
	
	local wpn = db.actor:active_item()
	if not wpn then return end
	local id = wpn:id()
	if id == cgd.id then return end

	local sec = wpn:section()
	if not has_parts(wpn) then
		clear_cgd()
		cgd.id = id
		print_dbg("Current wpn (no parts) changed to %s (%s)", cgd.id, sec)
	else
		cgd.id = id
		cgd.has_parts = true
		print_dbg("Current wpn changed to %s (%s)", cgd.id, sec)
		cgd.current_wpn_shot_dec = wpn and SYS_GetParam(2, sec,"condition_shot_dec") or 0.0005
		
		-- consider upgrades
		local upgrades = utils_item.get_upgrades_installed(obj)
		for _, upgrade in pairs(upgrades) do
			local section = ini_sys:r_string_ex(upgrade, "section")
			local shot_dec = ini_sys:r_string_ex(section,"condition_shot_dec")
			if shot_dec then
				local op = string.sub(shot_dec, 1, 1)
				local val = tonumber(string.sub(shot_dec, 2))
				cgd.current_wpn_shot_dec = op == "+" and cgd.current_wpn_shot_dec + val or cgd.current_wpn_shot_dec - val
			end
		end

		-- ingest parts
		cgd.parts = {}
		local saved_parts = item_parts.get_parts_con(wpn, nil, true)
		-- fix mistakes - if weapon should have parts but were deleted, delete and restore
		for k, v in pairs(saved_parts) do
			print_dbg("Part: %s, condition of part: %s", k, v)
			if is_trigger(k) then
				cgd.trigger_name = k
				cgd.parts[k] = v
			elseif is_barrel(k) then
				cgd.barrel_name = k
				cgd.barrel_con = v
			elseif is_part(k) then
				cgd.parts[k] = v
			end
		end
		-- manage family data
		cgd.data = {}
		local parent = parent_section(sec)
		if not ini_weapon:section_exist(parent) then parent = "base" end
		cgd.data.jam_chance = larp.str_explode_num(ini_weapon:r_string_ex(parent, "jam_chance") or "0.001, 0.03, 0.09, 0.27, 0.81", ",")
		cgd.data.max_jam_chance = ini_weapon:r_float_ex(parent, "max_jam_chance") or 1
		cgd.data.misfire_chance = larp.str_explode_num(ini_weapon:r_string_ex(parent, "misfire_chance"), ",")
		cgd.data.superjam_mult = ini_weapon:r_float_ex(parent, "superjam_mult") or 1
		cgd.data.damage_chance_mult = ini_weapon:r_float_ex(parent, "damage_chance_mult") or 1
		cgd.data.barrel_wear = ini_weapon:r_float_ex(parent, "barrel_wear") or 1
		cgd.ammo_data = utils_item.get_ammo(nil, wpn:id())
	end
end

function get_ammo_impair(wpn)
	if wpn:id() ~= cgd.id or not get_config("oldammo") then return 1 end
	local ammo = cgd.ammo_data[wpn:get_ammo_type()+1]
	return ammo and SYS_GetParam(2, ammo, "impair") or 1
end

-- returns true if using ammo with impair > 1
function using_old_ammo(wpn)
	return get_ammo_impair(wpn) > 1
end

-- individually calculate jam based on weapon parts, and jam the weapon if applicable
-- Average jam chance based on damage level of each component.
local function calculate_jam(wpn)
	if guarantee_not_jam > 0 then
		return
	end
	
	jam_chance = calculate_jam_chance(wpn)

	print_dbg("Final jam chance: %s", jam_chance)

	if (math_random() < jam_chance) then
		if wpn:get_ammo_in_magazine() > 0 and get_config("superjam") and (math_random() < (cgd.data.superjam_mult * jam_chance/2)) then
			set_jam_status(wpn:id(), JamType.DoubleFeed)
			print_dbg("Severe jam")
		else
			set_jam_status(wpn:id(), JamType.FailureToEject)
			print_dbg("Normal jam")
		end
		start_jammin(2)
		CreateTimeEvent("arti_jamming", "jamsound", 0.1, 
		function(sec, key)
			play_sound(nil, 1, sec, key)
			return true
		end
		, wpn:section(), "jam_sound")
		send_msg("ui_st_jam")
	end
end

-- assumes weapon being used is current
function calculate_jam_chance(wpn, extra)
	-- compute base chance from quality of weapon parts
	local count = 0
	local mechanism_cond = #cgd.parts
	for k, v in pairs(cgd.parts) do -- skip barrel
		local severity = 5 - clamp(math_floor(v / 20), 0, 4)
		mechanism_cond = mechanism_cond + cgd.data.jam_chance[severity]
		count = count + 1
	end
	jam_chance = mechanism_cond/count
	if not extra then return jam_chance end
	-- apply ammo, mcm and condition enhancements
	local ammo_impair = get_ammo_impair(wpn)
	if ammo_impair > 0 then
		if jam_chance == 0 then jam_chance = clamp(0.1 * (ammo_impair - 1), 0, 0.05)
		else
			jam_chance = jam_chance * ammo_impair
		end
	end
	-- enhancing jam chance
	jam_chance = jam_chance * get_config("jamchance")
	-- condition can increase jam chance by up to 3x
	local cond = wpn:condition()
	local ratio = cond < 0.9 and 1 + (0.9-cond)/0.45 or 1
	jam_chance = jam_chance * ratio

	jam_chance = clamp(jam_chance, 0, cgd.data.max_jam_chance)

	return jam_chance
end

-- Randomly damage 1 part of the weapon by DAMAGE, skipping barrels
-- wear reduces damage and happens more frequently
local function damage_part(wpn, wear)
	local to_damage = random_key_table(cgd.parts)
	local part_con = cgd.parts[to_damage]
	local amt = wear and 1 or math_random(5, 12)
	cgd.parts[to_damage] = clamp(part_con - amt, 0, 99)

	print_dbg("%s damaged %s amt to %s condition", to_damage, amt, cgd.parts[to_damage])
	if get_config("verbosity") then
		news_manager.send_tip(db.actor, gc("ui_st_parts_damage"), nil, "swiss_knife", 6000)
	end
	if not wear then
		CreateTimeEvent("arti_jamming", "damsound", 0.1, 
		function()
			play_sound(nil, 0.5, wpn:section(), "damage_sound")
			return true
		end)
	 end
end

-- Calculate chance to damage based on weapon condition
local function calculate_damage(wpn)
	local cond = wpn and wpn:condition() or 1
	local damaged = false
	local roll = math_random()
	local damage_chance = calculate_damage_chance(wpn)


	if (roll < damage_chance) then
		damage_part(wpn)
		damaged = true
	else
		-- wear is mostly an omnipresent threat
		wear_chance = clamp(damage_chance * 1.5, 0, 1)
		if math_random() < wear_chance then
		damage_part(wpn, true)
		damaged = true
		end
	end

	-- calculate random condition damage
	if wpn:condition() > 0.2 then
		local chance = 2 * calculate_jam_chance(wpn)
		if math_random() < chance then
			local degrade = math_random(3)/100
			wpn:set_condition(wpn:condition() - degrade, 0, 1)
			damaged = true
		end
	end

	local barrel_wear = calculate_barrel_wear(wpn, old_ammo)

	print_dbg("Calculating damage: Old ammo %s, barrel wear %s, Final: %s", old_ammo, barrel_wear, damage_chance)

	if (roll < barrel_wear) then
		print_dbg("Damaged barrel")
		cgd.barrel_con = cgd.barrel_con > 0 and cgd.barrel_con - 1 or 0
		damaged = true
	end
	
	if damaged then
		persist_current_weapon()
	end
end

-- damage chance is 0-1
function calculate_damage_chance(wpn)
	local cond = wpn and wpn:condition() or 1
	local threshold = (get_config("threshold") or 85)/100
	local damage_chance = 0
	old_ammo = get_ammo_impair(wpn)
	if (cond < threshold) then
		-- 200 x (threshold - condition) * per shot decrease, should result in pretty small chances
		damage_chance = (threshold - cond) * cgd.current_wpn_shot_dec * 200 * (cgd.data.damage_chance_mult or 1)
		if old_ammo > 1 then
			damage_chance = damage_chance * old_ammo
		end
	else
		if old_ammo > 1 then damage_chance = clamp(0.1 * (old_ammo - 1), 0, 0.05) end
	end
	return damage_chance
end

function calculate_barrel_wear(wpn)
	old_ammo = using_old_ammo(wpn) and 2 or 1
	return old_ammo * cgd.data.barrel_wear
end

-- calculate misfire change of held weapon
function calculate_misfire()
	local trigger_con = cgd.parts[cgd.trigger_name] or 99
	local severity = 5 - clamp(math_floor(trigger_con / 20), 0, 4)
	local misfire_chance = cgd.data.misfire_chance[severity]
	misfire_chance = misfire_chance * get_config("jamchance")
	return misfire_chance
end

local last_wpn_snd_empty = {nil, "$no_sound", 1}
local tg_snd_empty = 0
local delay_snd_empty = 300 -- ms
-- before fire - misfire, block shot if jammed with same clicky sound for zeroed weapons
function actor_on_weapon_before_fire(flags)

	local wpn = db.actor:active_item()
	local id = wpn and wpn:id() or 0

	if wpn and id ~= cgd.id then
		-- populate current gun
		update_current()
	end

	if not wpn or id ~= cgd.id or wpn:get_ammo_in_magazine() == 0 or not cgd.has_parts or wpn:weapon_in_grenade_mode() then return end

	-- if missing parts do not roll for misfire
	if missing_parts(wpn, true) then
		send_msg("ui_st_missing")
		flags.ret_value = false
		return
	end
	-- if guarantee not jam, don't even calculate this
	if guarantee_not_jam > 0 then
		return
	end

	-- misfire the weapon
	local misfire_chance = calculate_misfire()
	print_dbg("Misfire chance: "..misfire_chance)
	-- soft misfire
	-- if math_random() < clamp(misfire_chance * 3, 0, 1) then
	-- 	flags.ret_value = false
	-- 	return
	-- end
	-- FTE/Double feed
	if not get_jammed(id) then
		calculate_jam(wpn)
		if get_jammed(id) then
			return
		end
	end
	-- hard misfire
	if not get_jammed(id) and math_random() < misfire_chance then
		set_jam_status(id, JamType.Misfire)
	end
	
	local str = ""
	-- check for malfunction
	if get_jammed(id) then
		local sec = wpn:section()
		-- Cache
		if (sec ~= last_wpn_snd_empty[1]) then
			-- Reset
			last_wpn_snd_empty[1] = sec
			last_wpn_snd_empty[2] = "$no_sound"
			last_wpn_snd_empty[3] = 1
			
			-- Get empty sound
			local snd = ini_sys:r_string_ex(sec,"snd_empty")
			if snd and (snd ~= "") then
				snd = str_explode(snd,",")
				last_wpn_snd_empty[2] = snd[1]
				last_wpn_snd_empty[3] = snd[2] or 1
			end
		end
		-- Play empty clip sound
		local tg = time_global()
		if (last_wpn_snd_empty[2] ~= "$no_sound") and (tg > tg_snd_empty) then
			utils_obj.play_sound( last_wpn_snd_empty[2], last_wpn_snd_empty[3] or 1 )
			tg_snd_empty = tg + delay_snd_empty
		end
		--ADDED jam_swearing()
		jam_swearing()			
		start_jammin(2)
		if (get_jam_status(id) == JamType.DoubleFeed) then
			str = "ui_st_superjam"
		else
			str = "ui_st_jam"
		end
		-- Don't shoot
		flags.ret_value = false
		send_msg(str)
	end
end

-- after fire - chance of FTE, double feed
-- if shoot success, calculate damage
function actor_on_weapon_fired(obj, wpn, ammo_elapsed, grenade_elapsed, ammo_type, grenade_type)
	if (obj:id() ~= AC_ID) then
		return
	end
	local id = wpn:id()
	if id ~= cgd.id or not cgd.has_parts or wpn:get_ammo_in_magazine() == 0 or missing_parts(wpn) or wpn:weapon_in_grenade_mode() then
		return 
	end

	-- calc and apply jam
	wpn = utils_item.item_is_fa(wpn) and wpn
	if not wpn then return end
	
	if get_jammed(id) then
		level.release_action(bind_to_dik(key_bindings.kWPN_FIRE))
	end
	if not cgd.parts or is_empty(cgd.parts) then return
	elseif (not get_jammed(id) 
	or get_jam_status(id) == JamType.FailureToEject 
	or get_jam_status(id) == JamType.DoubleFeed) then
		calculate_damage(wpn)
	end

	if guarantee_not_jam > 0 then
		guarantee_not_jam = guarantee_not_jam - 1
	end

	-- calc and apply extra degradation in rain
	local degradation_factor = 1
	if level.rain_factor() > 0.3 and not GetEvent("current_safe_cover") then
		degradation_factor = degradation_factor * (get_config("degradation") or 1.5)
	end

	if degradation_factor > 1 then
		degradation_factor = degradation_factor - 1
		local degradation = degradation_factor * cgd.current_wpn_shot_dec
		print_dbg("Degrading by additional %s", degradation)
		wpn:set_condition(clamp(wpn:condition() - degradation, 0, 0.999))
	end
end

function check_unjam(wpn)
	return get_jammed(wpn:id())
end

function string_unjam()
	return gc("st_unjam")
end

function get_sound(sec, key)
	print_dbg("Get sound %s %s", sec, key)
	key = key or "unjam_sound"
	sec = sec and parent_section(sec) or "base"
	sec = ini_weapon:section_exist(sec) and sec or "base"
	return "wpo\\"..ini_weapon:r_string_ex(sec, key)
end

function play_sound(snd, vol, sec, key)
	print_dbg("Play sound %s %s %s %s", snd, vol, sec, key)
	if not snd then
		snd = get_sound(sec, key)
	end
	print_dbg("Playing %s", snd)
	utils_obj.play_sound(snd, vol)
end

function toggle_slot(slot)
	db.actor:activate_slot(slot)
	return true
end

-- do an unjam, optionally playing sounds and such
function apply_unjam(id, sound, message)
	if not unjam_in_progress then 
		print_dbg("Unjam interrupted for %s", id)
		return true
	end
	unjam_in_progress = false
	if sound and sound ~= "" then
		play_sound(sound)
	end
	if message then
		send_msg(message)
	end
	if id and id ~= 0 then
		set_jam_status(id, nil)
		guarantee_not_jam = 1
	end
	return true
end

function check_simple(weapon)
	local str = gc("ui_st_functional")
	send_msg(str)
	guarantee_not_jam = 1
end

function check_anim(weapon)
	check_simple(weapon)
	local sec = weapon:section()
	local idle_section = utils_item.addon_attached(weapon ,"gl") and (weapon:weapon_in_grenade_mode() and "anm_bore_g" or "anm_bore_w_gl") or "anm_bore"
	local hud = ini_sys:r_string_ex(sec, "hud")
	print_dbg("searching for "..idle_section.. " for weapon section "..hud)

	local bored_anim = hud and ini_sys:r_string_ex(hud, idle_section)
	if bored_anim then
		weapon:switch_state(4)
		guarantee_not_jam = 1
	end
end

-- put down and bring back up
function unjam_simple(weapon)
	stop_jammin()
	local str = gc("ui_st_unjam")
	local id = weapon:id()
	local sec = parent_section(weapon:section())
	local sound = get_sound(sec)
	local active_slot = db.actor:active_slot()
	toggle_slot(0)

	unjam_in_progress = true
	CreateTimeEvent("arti_jamming", "unjam"..id, 0.1, 
	unjam_simple_timed,
	active_slot, id, sound, str)
end

function unjam_simple_timed(slot, id, sound, message)
	if not unjam_in_progress then
		print_dbg("unjam_replace_simple interrupted")
		toggle_slot(slot)
		return true
	end
	local current_weapon = db.actor:active_item()
	if current_weapon then return false end
	
	toggle_slot(slot)
	-- premature interrupt
	apply_unjam(id, sound, message)

	return true
end
-- unjam held weapon with animation
function unjam_anim(weapon)
	-- don't unjam if weapon is still in Fire state
	if weapon:get_state() == 5 then
		return
	end
	stop_jammin()
	local str = gc("ui_st_unjam")
	local id = weapon:id()
	local sec = weapon:section()
	-- blindside compat, check for unjaminations and cache anim name and sound
	local unjam_anims = get_unjam_animation(weapon)
	if unjam_anims ~= nil then
		unjam_in_progress = true
		local to_search = utils_item.addon_attached(weapon ,"gl") and "anm_reload_misfire_w_gl" or "anm_reload_misfire"
		local unjam_sound = ini_sys:r_string_ex(sec, "snd_reload_misfire") or ini_sys:r_string_ex(sec, "snd_reload_1") or "$no_sound"
		-- shorten time so that jam is cleared before the next animation plays
		local length = play_anim(weapon, to_search, unjam_sound) - 10
		CreateTimeEvent("arti_jamming", "restore", length/1000, apply_unjam, id)
	end

end

function unjam_super_simple(weapon)
	if weapon:get_ammo_in_magazine() > 1 then
		start_jammin(50)
		jam_swearing()
		send_msg(gc("ui_st_unjam_fail"))
		weapon:switch_state(2)
	else
		unjam_simple(weapon)
	end
end

function unjam_super_anim(weapon)
	if weapon:get_ammo_in_magazine() > 1 then
		start_jammin(50)
		jam_swearing()
		send_msg(gc("ui_st_unjam_fail"))
		weapon:switch_state(2)
	else
		unjam_anim(weapon)
	end
end


function determine_slot(weapon)
	for i=1,5 do 
		local item = db.actor:item_in_slot(i)
		local item_id = item and item:id() or 0
		if weapon:id() == item_id then return i end
	end
end

-- clear the entry, no qs asked
function inv_unjam(weapon)
	if get_jam_status(weapon:id()) > 1 then return end
	unjam_in_progress = true
	apply_unjam(weapon:id(), get_sound(weapon:section()))
end

function unjam_and_clone(weapon, slot, sound)
	if not unjam_in_progress then
		print_dbg("unjam_replace_simple interrupted")
		toggle_slot(slot)
		return true
	end
	local current_weapon = db.actor:active_item()
	if current_weapon then return false end

	apply_unjam(weapon:id(), sound)
	local old_weapon = alife_object(weapon:id())
	local new_weapon = alife_clone_weapon(old_weapon)
	print_dbg("cloned weapon, doing restoration")
	CreateTimeEvent("arti_jamming", "move_to_slot", 0.1, 
		function(weapon, slot)
			print_dbg("unjam_replace_simple - restoring weapon to slot %s", slot)
			db.actor:move_to_slot(level.object_by_id(weapon), slot)
			toggle_slot(slot)
			return true
		end, 
	new_weapon.id, slot)
	return true
end

-- hide, clone, move
function unjam_replace_simple(weapon)
	if not weapon then return end
	local slot = determine_slot(weapon)
	local sound = get_sound(weapon:section())
	print_dbg("slot determined is %s", slot)
	unjam_in_progress = true
	local active_slot = db.actor:active_slot()
	toggle_slot(0)
	print_dbg("replacing weapon %s", weapon:id())
	CreateTimeEvent("arti_jamming", "move "..weapon:id(), 0.1, unjam_and_clone, weapon, slot, sound)
	print_dbg("unjam replace returning")
	return true
end

-- just change the state to reloading and check when reloading is done
function unjam_replace_anim(weapon)
	weapon:switch_state(7)
	unjam_in_progress = true
	apply_unjam(weapon:id())
end

function inv_unjam_replace(weapon)
	unjam_in_progress = true
	apply_unjam(weapon:id(), get_sound(weapon:section()))
	local slot = determine_slot(weapon)
	local old_weapon = alife_object(weapon:id())
	local new_weapon = alife_clone_weapon(old_weapon)
	if slot then
		CreateTimeEvent("arti_jamming", "move_to_slot", 0.1, 
			function(weapon, slot)
				print_dbg("unjam_replace_simple - restoring weapon to slot %s", slot)
				db.actor:move_to_slot(level.object_by_id(weapon), slot)
				toggle_slot(slot)
				return true
			end, 
		new_weapon.id, slot)
	end
end

-- conditions:
-- unjam type? ok (0), misfire/feed (just 1), failure to eject(2), doublefeed(3), classic (4)
-- currently held?
-- has animation?
-- these functions will be completely responsible for what happens
local unjam_router = {
	-- held or not
	held = {
		[JamType.OK] = {
			anim = check_anim,
			no_anim = check_simple
		},
		[JamType.Misfire] = {
			anim = unjam_anim,
			no_anim = unjam_simple
		},
		[JamType.FailureToEject] = {
			anim = unjam_anim,
			no_anim = unjam_simple
		},
		[JamType.DoubleFeed] = {
			anim = unjam_super_anim,
			no_anim = unjam_super_simple
		},
		[JamType.Classic] = {
			anim = unjam_replace_anim,
			no_anim = unjam_replace_simple
		}
	},
	inventory = {
		[JamType.Misfire] = {
			anim = inv_unjam,
			no_anim = inv_unjam
		},
		[JamType.FailureToEject] = {
			anim = inv_unjam,
			no_anim = inv_unjam
		},
		[JamType.DoubleFeed] = {
			anim = inv_unjam,
			no_anim = inv_unjam
		},
		[JamType.Classic] = {
			anim = inv_unjam_replace,
			no_anim = inv_unjam_replace
		}
	}
}
-- Unjam works by clearing weapon ID from the jam table, if conditions are met.
function unjam(wpn)
	local weapon = wpn or db.actor:active_item()
	if not weapon then return end
	if unjam_in_progress then
		print_dbg("weapon already being unjammed")
		return
	end
	local id = weapon:id()
	local active_id = db.actor:active_item() and db.actor:active_item():id() or 0 
	local sec = weapon:section()

	if not weapon then
		return
	end

	if missing_parts(weapon) then
		send_msg("ui_st_missing")
		return
	end

	local is_current = id == active_id and "held" or "inventory"

	local jam_level = get_jam_status(id) or 0

	local has_anim = get_unjam_animation(weapon) and "anim" or "no_anim"

	print_dbg("unjam current: %s jam level: %s has_anims: %s. has function? %s", is_current, jam_level, has_anim, unjam_router[is_current][jam_level][has_anim] ~= nil)

	if unjam_router[is_current][jam_level][has_anim] then
		unjam_router[is_current][jam_level][has_anim](weapon)
	end
end


function get_unjam_animation(weapon)					
	local sec = weapon:section()
	local to_search = utils_item.addon_attached(weapon ,"gl") and "anm_reload_misfire_w_gl" or "anm_reload_misfire"
	local hud = ini_sys:r_string_ex(sec, "hud")
	print_dbg("searching for "..to_search.. " for weapon section "..hud)
	local unjam_anims = hud and ini_sys:r_string_ex(hud,to_search)
	return unjam_anims
end

-- SECTION callbacks --


local disallowed = {
	[key_bindings.kINVENTORY] = true,
	[key_bindings.kWPN_RELOAD] = true,
	[key_bindings.kNIGHT_VISION] = true,
	[key_bindings.kWPN_NEXT] = true,
	[key_bindings.kWPN_1] = true,
	[key_bindings.kWPN_2] = true,
	[key_bindings.kWPN_3] = true,
	[key_bindings.kWPN_4] = true,
	[key_bindings.kWPN_5] = true,
	[key_bindings.kWPN_6] = true,

}
function on_key_press(key)
	-- certain actions interrupt any unjams in progress
	local bind = dik_to_bind(key)
	if unjam_in_progress and disallowed[bind] then
		print_dbg("unjam interrupted by action")
		unjam_in_progress = false
	end
end


function actor_on_weapon_jammed(actor)
	local wpn = db.actor:active_item()
	if not get_jammed(wpn:id()) then
		if not pcall(function(wpn)
			set_jam_status(wpn:id(), JamType.FailureToEject)
		end, wpn) then
			set_jam_status(wpn:id(), JamType.Classic)
		end
	end
	wpn:cast_Weapon():SetMisfire(false)
	jam_swearing()
	play_sound(nil, 2, wpn:section(), "jam_sound")
end

function actor_on_weapon_reload(wpn)
	local id = wpn:id()
	local jam_lv = get_jam_status(id)
	if jam_lv then
		if magazines and magazines.do_interrupt_reload then magazines.do_interrupt_reload() end
		-- drop mag if simplejam enabled and superjammed
		if get_config("simplejam") and jam_lv == JamType.DoubleFeed then
			-- on simplejam, unload the magazine
			mag_support.eject_mag(wpn)
		end
		CreateTimeEvent("arti_jamming", "cancel_reload", 0.1, 
			function(wpn)		
				wpn:switch_state(2)
				return true
			end
		, wpn)
	end
end

-- Reduces player outgoing damage based on barrel quality, up to 50% -- 
local function reduce_damage(npc, shit, bone_id, flags)
	-- skip if it wasnt a hit by the player
	if not (shit.draftsman and shit.draftsman:id() == 0) then 
		return 
	end

	-- skip if player has no weapon out, or weapon has no parts
	local weapon = db.actor:active_item()
	if not weapon or barrel_con == nil then
		return 
	end

	if barrel_con > 80 then
		return 
	else
		local ratio = (80 - barrel_con)/80
		shit.power = shit.power * (1 - (0.5 * ratio))
	end
end

function npc_on_before_hit(npc,shit,bone_id, flags)
	reduce_damage(npc, shit, bone_id, flags)
end
function monster_on_before_hit(monster,shit,bone_id, flags)
	reduce_damage(monster, shit, bone_id, flags)
end

-- Clear jam mid animation with motion marks
function actor_on_hud_animation_mark(state, mark)
	if mark == "clear_jam" then
		ResetTimeEvent("arti_jamming", "restore", 0)
	end
end

function on_game_start()

	-- add custom functors
	custom_functor_autoinject.add_functor("arti_unjam", check_unjam, string_unjam, nil, unjam, false)
	RegisterScriptCallback("on_key_press",on_key_press)
	RegisterScriptCallback("actor_on_weapon_jammed",actor_on_weapon_jammed)
	RegisterScriptCallback("actor_on_weapon_before_fire",actor_on_weapon_before_fire)
	RegisterScriptCallback("actor_on_weapon_fired",actor_on_weapon_fired)
	RegisterScriptCallback("actor_on_weapon_reload",actor_on_weapon_reload)
	RegisterScriptCallback("actor_on_first_update",actor_on_first_update)
	RegisterScriptCallback("npc_on_before_hit",npc_on_before_hit)
	RegisterScriptCallback("monster_on_before_hit",monster_on_before_hit)
	RegisterScriptCallback("actor_on_hud_animation_mark",actor_on_hud_animation_mark)
end