local function send_message(arena,num_str)
    arena_lib.HUD_send_msg_all("title", arena, num_str, 1,nil,0xFF0000)
    --arena_lib.HUD_send_msg_all(HUD_type, arena, msg, <duration>, <sound>, <color>)
end

arena_lib.on_load("sumo", function(arena)
    
    send_message(arena,'3')
    minetest.after(1, function(arena)
        send_message(arena,'2')
        minetest.after(1, function(arena)
            send_message(arena,'1')
            local item = ItemStack("sumo:pushstick")

            for pl_name, stats in pairs(arena.players) do
                local player = minetest.get_player_by_name(pl_name)
                player:get_inventory():set_stack("main", 1, item)
                local message = 'Controls: '..
                minetest.colorize('Red', '[Punch]: ')..
                minetest.colorize('Green', 'Push other players ')..
                minetest.colorize('Red', '[Punch]+[Aux1 (e)]: ')..
                minetest.colorize('Green', 'Exchange places ')..
                minetest.colorize('Red', '[Punch]+[Sneak]: ')..
                minetest.colorize('Green', 'Push harder ')..
                minetest.colorize('Red', '[Place]: ')..
                minetest.colorize('Green', 'Vault ')..
                minetest.colorize('Red', '[Place]+[Aux1 (e)]: ')..
                minetest.colorize('Green', '2 sec speed boost. ') ..
                'Cooldowns Apply!'
                minetest.chat_send_player(pl_name,message)
            end
            minetest.after(1, function(arena)
                arena_lib.HUD_send_msg_all("title", arena, "Fight!", 1,nil,0x00FF00)
                


            end, arena)
    
        end, arena)
    
    end, arena)

end)

--this is necessary beacuse it is required by arena_lib for timed games
arena_lib.on_time_tick('sumo', function(arena)

    if arena.in_game and not arena.in_celebration then
        local c = 0x00FF00
        if arena.current_time < 60 then
            c = 0xFFFF00
        end
        if arena.current_time < 10 then
            c = 0xFF0000
        end

        if arena.current_time < arena.initial_time - 5 then
            arena_lib.HUD_send_msg_all('hotbar', arena, arena.current_time, 1,nil,c)
        end
    end
        
    
end)

minetest.register_on_player_hpchange(function(player, hp_change)
    local pl_name = player:get_player_name()
    if arena_lib.is_player_in_arena(pl_name, 'sumo') then
        local arena = arena_lib.get_arena_by_player(pl_name)
        local hp = player:get_hp()
        if arena.in_celebration then --protect winners from damage
            return 0
        end
        if hp + hp_change <= 0 then --dont ever kill players, but if a damage *would* kill them, then eliminate them, and set their health back to normal
            arena_lib.HUD_hide('hotbar', p_name)
            arena_lib.remove_player_from_arena(pl_name, 1)
            player:set_hp(20)
            return 0
        else
            return hp_change --if it would not kill players then apply damage as normal
        end


    else
        return hp_change
    end


end, true)


--if the game times out
arena_lib.on_timeout('sumo', function(arena)
    local winner_names = {}
    for p_name, p_stats in pairs(arena.players) do
        table.insert(winner_names, p_name)
    end
    arena_lib.load_celebration('sumo', arena, winner_names)
end)



arena_lib.on_death('sumo', function(arena, p_name, reason)
    arena_lib.HUD_hide('hotbar', p_name)
    if not arena.in_celebration then

        arena_lib.remove_player_from_arena(p_name, 1)
    end
end)


arena_lib.on_celebration('sumo', function(arena, winner_name)
    arena_lib.HUD_hide('hotbar', arena)

end)

arena_lib.on_quit('sumo', function(arena, pl_name, is_forced)
    arena_lib.HUD_hide('hotbar', pl_name)
end)


arena_lib.on_eliminate('sumo', function(arena, p_name)

    minetest.sound_play('sumo_lose', {
        to_player = p_name,
        gain = 2.0,
    })
    --minetest.chat_send_all(dump(arena))

    local count = 0
    local sound = 'sumo_elim'
    for p_name,data in pairs(arena.players) do
        count = count + 1
    end
    if count == 1 then
        sound = 'sumo_win'
    end

    for p_name, stats in pairs(arena.players) do


        minetest.sound_play(sound, {
            to_player = p_name,
            gain = 2.0,
        })
    end


end)

--remove stick if in inv when joinplayer
minetest.register_on_joinplayer(function(player)
	local inv = player:get_inventory()
	local stack = ItemStack("sumo:pushstick")
	local taken = inv:remove_item("main", stack)

end)