local function is_point_behind_plane(point, plane_normal, plane_dist)
    local d = point:Dot(plane_normal)
    return d < -plane_dist
end

local function getEyeAngles(player) --from royal, gets accurate eye angles
	local pitch = player["m_angEyeAngles[0]"]
	local yaw = player["m_angEyeAngles[1]"]

	return Vector(pitch, yaw, 0)
end

local function chatMessage(message)
	local allPlayers = ents.GetAllPlayers()

	for _, player in pairs(allPlayers) do
		player:AcceptInput("$DisplayTextChat", message)
	end
end

function AngleTesterBotSpawn(status, activator)

	
	local bulletWeapons = {
		[1] = "TF_WEAPON_ROCKETLAUNCHER",
		-- [1] = "MARKER",
		[2] = "TF_WEAPON_ROCKETLAUNCHER"
	}


    local fireTime = {
        [1] = 9999,
        [2] = 9999
    }

	local dronesDeadCount = 0

	local dronePrefix = "drone" .. tostring(activator:GetHandleIndex())
	local droneOffsets = {Vector(0, 0, 150)}
	local droneCountToSpawn = 1
	for i = 1, droneCountToSpawn do
		local sentryModel = ents.CreateWithKeys("prop_dynamic", {
			model = "models/rcat/rcat_level2.mdl",
            ["$positiononly"] = 1,
			skin = 1,
		}, true, true)

		sentryModel:SetName(dronePrefix .. tostring(sentryModel:GetHandleIndex()))

		local weaponMimic = ents.CreateWithKeys("tf_point_weapon_mimic", {
			teamnum = activator.m_iTeamNum,
			["$preventshootparent"] = 1,
			["$weaponname"] = bulletWeapons[i],
			["$firetime"] = fireTime[i],
		})

		weaponMimic:SetName(dronePrefix .. "_weaponmimic_" .. tostring(sentryModel:GetHandleIndex()))

		weaponMimic["$SetOwner"](weaponMimic, activator)
		weaponMimic:SetParent(sentryModel)

		sentryModel["$fakeparentoffset"] = droneOffsets[i]
		sentryModel:SetFakeParent(activator)

        weaponMimic["$StartFiring"](weaponMimic, math.huge)

		local logic
		logic = timer.Create(0.1, function()
			if not IsValid(sentryModel) then
				timer.Stop(logic)
				return
			end

			local curOrigin = sentryModel:GetAbsOrigin()

			local closest = { nil, math.huge }
			for _, player in pairs(ents.GetAllPlayers()) do
				local valid = true

				if not player:IsAlive() then
					valid = false
				elseif player.m_iTeamNum == activator.m_iTeamNum then
					valid = false
				elseif player:InCond(TF_COND_DISGUISED) == 1 then
					valid = false
				elseif player:InCond(TF_COND_STEALTHED) == 1 then
					valid = false
				end

                if valid then
					
					local porigin = player:GetAbsOrigin()
                    local distance = curOrigin:Distance(porigin)
					local vectorToPlayer = porigin - curOrigin
					local botToPlayerAngles = vectorToPlayer:ToAngles()
					local botEyeAngles = getEyeAngles(activator)

					chatMessage(is_point_behind_plane(porigin,botEyeAngles:GetForward(),curOrigin:Length()))

                    if distance < closest[2] then
                        closest = { player, distance }
                    end

                end
			end

            if not closest[1] then
                return
            end

            sentryModel:FaceEntity(closest[1])
		end, 0)

		-- go straight to phase 2 if both drones are destroyed prematurely
		-- drone:AddCallback(ON_REMOVE, function ()
		--     dronesDeadCount = dronesDeadCount + 1

		--     if dronesDeadCount >= 2 then
		--         ColDronemanEngaged(_, activator, true)
		--     end
		-- end)
	end
end

local function getDrones(activator)
	local dronePrefix = "drone" .. tostring(activator:GetHandleIndex()) .. "_weaponmimic_"

	return ents.FindAllByName(dronePrefix .. "*")
end

local function removeAllDrones(activator)
	for _, drone in pairs(ents.FindAllByName("drone" .. tostring(activator:GetHandleIndex()) .. "*")) do
		util.ParticleEffect("ExplosionCore_buildings", drone:GetAbsOrigin(), Vector(0, 0, 0))
		drone:Remove()
	end
end