local function PopulateAISBXToolMenu(pnl)
    pnl:CheckBox("Allow NPCs to target downed NPCs", "zcnpci_npc_targeting_enabled")
    pnl:ControlHelp("If enabled, NPCs target downed hostile NPCs.")

    pnl:CheckBox("NPCs should target head", "zcnpci_target_should_follow_head")
    pnl:ControlHelp("Should NPCs target the player's head? This can result in more effective targeting.")

    pnl:CheckBox("NPCs shouldn't target unconscious NPCs", "zcnpci_no_unconscious_targeting")

    pnl:CheckBox("NPCs shouldn't target unconscious players", "zcnpci_no_unconscious_targeting_players")
    pnl:ControlHelp("This may or may not work.")
end

local function PopulateCustomNPCSBXToolMenu(pnl)
    local modded_npc_whitelist = CreateConVar("zcnpci_modded_npc_whitelist", "NPC-classes-here!", bit.bor(FCVAR_ARCHIVE, FCVAR_REPLICATED))

    pnl:Help("ZCNPCi has support for both modded NPCs, as well as base-game humanoid NPCs that Z-City never added. There is no guarantee that modded NPCs will work, but ones with similar skeletal structure to other base-game humanoid NPCs will generally work better.")
    
    pnl:Help("As long as the NPC has a compatible skeleton, support will be provided for modded NPCs on a best-effort basis.")
    
    pnl:CheckBox("Allow base-game extended NPCs", "zcnpci_allow_extended_base_npcs")
    pnl:ControlHelp("Enable or disables applying custom health system to most other base-game humanoid NPCs, such as Kleiner.")

    pnl:CheckBox("Allow modded NPCs", "zcnpci_allow_modded_npcs")
    pnl:ControlHelp("Enable or disables applying custom health system to modded NPCs.")

    pnl:CheckBox("Auto enable for all humanoid NPCs", "zcnpci_auto_enable_humanoid_npcs")
    pnl:ControlHelp("If enabled, NPCs will automatically have the health system applied to them if they have a standard humanoid skeleton.")

    pnl:Help("List of enabled modded NPC classes")
    
    local text = vgui.Create("DTextEntry")
    text:SetMultiline(true)
    text:SetTall(200)
    text:SetValue(modded_npc_whitelist:GetString())

    text.OnChange = function (self)
        RunConsoleCommand("zcnpci_set_modded_npc_whitelist", text:GetValue())
    end

    pnl:AddItem(text)
    
    pnl:Help("A list of NPC classes, seperated by spaces or line breaks. Can only be set by a superadmin or server operator.")
end

local function PopulateRagdollSBXToolMenu(pnl)
    pnl:NumSlider("Stumble time", "zcnpci_stumble_time", 0, 10, 3)
    pnl:ControlHelp("How long the ragdoll should try to stumble for.")

    pnl:NumSlider("Wound grab chance", "zcnpci_woundgrab_chance", 0, 1, 3)
    pnl:ControlHelp("The chance the ragdoll will grab it's wound when shot.")

    pnl:NumSlider("Wound grab time", "zcnpci_woundgrab_time", 0, 10, 3)
    pnl:ControlHelp("How long the ragdoll should hold its wound.")
    
    pnl:CheckBox("Allow getting up", "zcnpci_unfake_enabled")
    pnl:ControlHelp("If enabled, NPCs will get back up if able.")

    pnl:NumSlider("Get up time", "zcnpci_unfake_time", 0, 5, 3)
    pnl:ControlHelp("How long the getting up animation lasts. Setting to 0 will disable the getting up animation.")

    pnl:NumSlider("Minimum down time", "zcnpci_down_time", 0, 20, 3)
    pnl:ControlHelp("The minimum amount of time the ragdoll should be down before trying to get back up.")
end

local function PopulatePerformanceSBXToolMenu(pnl)
    pnl:NumSlider("NPC ticks per second", "zcnpci_tps", 1, 66, 0)
    pnl:ControlHelp("How many times NPCs should be processed per second. Will make them more responsive at the cost of performance.")

    pnl:Help(" ")

    pnl:Help(" ")

    pnl:NumSlider("Activation range", "zcnpci_active_range", 0, 32768, 0)
    pnl:ControlHelp("How close the ragdoll has to be to a player to live when downed by direct damage. Enemies downed by other causes are unaffected.")

    pnl:CheckBox("Always activate on player kill", "zcnpci_always_active_on_player_kill")
    pnl:ControlHelp("If on, all player-damaged ragdolls will be activated regardless of other factors.")

    pnl:Help(" ")

    pnl:Help(" ")

    pnl:CheckBox("Enable automatic corpse removal", "zcnpci_enable_corpse_removal")
    pnl:ControlHelp("Enable or disable the removal of dead corpses.")

    pnl:NumSlider("Corpse time between loops", "zcnpci_corpse_loop_time", 1, 66, 0)
    pnl:ControlHelp("How long should we wait in between checks?")

    pnl:NumSlider("Max corpses", "zcnpci_max_corpses", -1, 64, 0)
    pnl:ControlHelp("The maximum amount of dead corpses that are allowed before one is removed. Set to -1 to disable")

    pnl:NumSlider("Max time", "zcnpci_max_corpse_time", -1, 600, 2)
    pnl:ControlHelp("The maximum amount of time before a corpse is removed. Set to -1 to disable")

    pnl:NumSlider("Max distance between player", "zcnpci_max_corpse_distance", -1, 32768, 2)
    pnl:ControlHelp("If the corpse is further than this distance, it will be removed. Set to -1 to disable")

    pnl:NumSlider("Min distance between player", "zcnpci_min_corpse_distance", 0, 32768, 2)
    pnl:ControlHelp("If the corpse is closer than this distance, it will never be cleared.")

    pnl:CheckBox("Treat crippled NPCs as dead", "zcnpci_treat_crippled_as_dead")
    pnl:ControlHelp("If on, bodies with amputations or both legs broken will be clearable.")

    pnl:CheckBox("Treat unconscious NPCs as dead", "zcnpci_treat_unconscious_as_dead")
    pnl:ControlHelp("If on, bodies that are unconscious will be clearable.")

    pnl:CheckBox("Treat near-death NPCs as dead", "zcnpci_treat_near_death_as_dead")
    pnl:ControlHelp("If on, bodies near death (severe blood loss, comas, etc.) will be clearable.")
end

local function PopulateMainSBXToolMenu(pnl)
    pnl:CheckBox("Enabled", "zcnpci_enabled")
    pnl:ControlHelp("Enable or disable the addon.")
    
    pnl:Help("This addon was developed by ToasterPanic.")

    pnl:Help("It is based on Kazarei's Euphoria, which in turn is a fork of Fedhoria by Rama. Their work powers the ragdoll movement.")
end


if engine.ActiveGamemode() == "sandbox" then
    hook.Add("AddToolMenuCategories", "ZCNPCICategory", function() 
        spawnmenu.AddToolCategory("Utilities", "zcnpci", "Z-City NPCi")
    end)

    hook.Add("PopulateToolMenu", "ZCNPCIMenuSettings", function() 
        spawnmenu.AddToolMenuOption("Utilities", "zcnpci", "ModdedNPCSettings", "Custom NPCs", "", "", function(pnl)
            pnl:ClearControls()
            PopulateCustomNPCSBXToolMenu(pnl)
        end)

        spawnmenu.AddToolMenuOption("Utilities", "zcnpci", "PerformanceSettings", "Performance", "", "", function(pnl)
            pnl:ClearControls()
            PopulatePerformanceSBXToolMenu(pnl)
        end)
        
        spawnmenu.AddToolMenuOption("Utilities", "zcnpci", "RagdollSettings", "Ragdoll", "", "", function(pnl)
            pnl:ClearControls()
            PopulateRagdollSBXToolMenu(pnl)
        end)
        
        spawnmenu.AddToolMenuOption("Utilities", "zcnpci", "AISettings", "AI", "", "", function(pnl)
            pnl:ClearControls()
            PopulateAISBXToolMenu(pnl)
        end)
        
        spawnmenu.AddToolMenuOption("Utilities", "zcnpci", "MainSettings", "Main", "", "", function(pnl)
            pnl:ClearControls()
            PopulateMainSBXToolMenu(pnl)
        end)
    end)
end