local mapID = 1
local emeraldCount = 0
local startup = 1


-- Function to split strings (credits to SabreTheWolf)
local function splitString(str, del)
    local arr = {}
    local last_num = 0
    local copy = ""
    for i = 1, string.len(str) do
        local char = string.sub(str, i, i)
        if char == del then
            last_num = last_num + 1
            arr[last_num] = copy
            copy = ""
        else
            copy = copy .. char
        end
    end
    last_num = last_num + 1
    arr[last_num] = copy
    return arr
end

-- Saves the map ID and the number of emeralds to a file
local function saveMapData(mapID, emeraldCount)
    local file = io.openlocal("client/mapinfo.dat", "w")
    if file then
        local data = mapID .. "," .. emeraldCount .. "\n"
        file:write(data)
        file:close()
    else
        print("Error: Could not open the file to save map data.")
    end
end

-- Function that executes when entering a new map
local function onMapEnter()
    local mapID = gamemap
    local emeraldCount = emeralds
	if not G_IsSpecialStage(mapID) and G_GametypeUsesLives() then
		saveMapData(mapID, emeraldCount)
	end
end

-- Function to load map information from the file
local function loadMapData()
    local file = io.openlocal("client/mapinfo.dat", "r")
    if file then
        local line = file:read("*line")
        file:close()
        if line and line ~= "" then
            -- The expected format for the line is: "mapID,emeraldCount"
            local data = splitString(line, ",")
            mapID = data[1]
            emeraldCount = tonumber(data[2]) or 0
            return mapID, emeraldCount
        end
    end
    print("Pugging error of the damn hell")
    return nil, nil
end

-- this Funkction runs when the server starts to load saved information
local function ServerStart()
    mapID, emeraldCount = loadMapData()
    if mapID then
        COM_BufAddText(nil, "map " .. mapID .. " -f")
        emeralds = emeraldCount  -- Updates the global variable that manages the emeralds.
		print("\130Loaded map: " .. mapID .. " with " .. emeraldCount .. " emeralds.")	
    else
        print("No saved map information found. Using default settings.")
    end
end

addHook("MapLoad", function ()
	if titlemapinaction then return end
		if startup == 1 then
			ServerStart()
			startup = 0
		end
	onMapEnter()
end)

addHook("GameQuit", function()
startup = 1
end)