ComfyFactorio/maps/wave_defense.lua

--vanilla with wave_defense

local WD = require 'modules.wave_defense.main'
local Map = require 'modules.map_info'

local starting_items = {['pistol'] = 1, ['firearm-magazine'] = 16, ['iron-plate'] = 16, ['iron-gear-wheel'] = 8, ['raw-fish'] = 3}

local function set_difficulty()
    local wave_defense_table = WD.get_table()
    --20 Players for maximum difficulty
    wave_defense_table.wave_interval = 7200 - #game.connected_players * 270
    if wave_defense_table.wave_interval < 1800 then
        wave_defense_table.wave_interval = 1800
    end
end

local function on_player_joined_game(event)
    set_difficulty()

    local player = game.players[event.player_index]
    if player.online_time == 0 then
        for item, amount in pairs(starting_items) do
            player.insert({name = item, count = amount})
        end
    end
end

local function on_player_left_game()
    set_difficulty()
end

local function on_init()
    local T = Map.Pop_info()
    T.main_caption = 'Wave Defense'
    T.sub_caption = '~~~~~~'
    T.text =
        table.concat(
        {
            'Survive\n',
            'as\n',
            'long\n',
            'as\n',
            'possible.\n'
        }
    )
    T.main_caption_color = {r = 150, g = 0, b = 150}
    T.sub_caption_color = {r = 100, g = 150, b = 0}
    game.surfaces[1].request_to_generate_chunks({0, 0}, 16)
    game.surfaces[1].force_generate_chunk_requests()
end

local event = require 'utils.event'
event.on_init(on_init)
event.add(defines.events.on_player_left_game, on_player_left_game)
event.add(defines.events.on_player_joined_game, on_player_joined_game)