-- ghost trail by lemin
-- v 1.0

local ghost_mobj = nil
local player_mobj = nil
local last_breadcrumb = nil

local breadcrumb_type = MT_THOK 

local function calculateDistance(x1, y1, z1, x2, y2, z2)
    -- Calculate the difference in the XY plane using FixedHypot
    local xyDistance = FixedHypot(x2 - x1, y2 - y1)
    -- Calculate the difference in the Z direction
    local dz = z2 - z1
    -- Now calculate the total 3D distance using these two values
    return FixedHypot(xyDistance, dz)
end

local function spawnBreadcrumb(x, y, z, scale, type)
    local breadcrumb = P_SpawnMobj(x, y, z, type)
    breadcrumb.scale = FRACUNIT * scale
    breadcrumb.renderflags = RF_FULLBRIGHT
    breadcrumb.blendmode = AST_ADD
    breadcrumb.color = SKINCOLOR_YELLOW
    last_breadcrumb = breadcrumb
end


addHook("PlayerThink", function(player)
    if modeattacking == true then
        player_mobj = player.mo
    else 
        player_mobj = nil
    end
end)



addHook("MobjThinker", function(mobj)
    if modeattacking == true and leveltime > 2 then
        if mobj.type == MT_GHOST and ghost_mobj == nil then
            ghost_mobj = mobj
        end
        if mobj == ghost_mobj then
            local distanceFromPlayer = calculateDistance(mobj.x, mobj.y, mobj.z, player_mobj.x, player_mobj.y, player_mobj.z)
            local distanceFromLastBreadcrumb = 1000001 -- yes this is kinda dumb but it works
            if last_breadcrumb ~= nil then
                distanceFromLastBreadcrumb = calculateDistance(mobj.x, mobj.y, mobj.z, last_breadcrumb.x, last_breadcrumb.y, last_breadcrumb.z)
            end
            if distanceFromPlayer > 10000000 and distanceFromLastBreadcrumb > 1000000 then
                    spawnBreadcrumb(mobj.x, mobj.y, mobj.z, 1, breadcrumb_type)
            end
        end
        if mobj.type == breadcrumb_type then
            local distance = calculateDistance(mobj.x, mobj.y, mobj.z, player_mobj.x, player_mobj.y, player_mobj.z)
            if distance > 10000000 then
                mobj.tics = -1
            else
                mobj.tics = 0
            end
        end
    else
        ghost_mobj = nil
        last_breadcrumb = nil
    end
end)