swap_modifier.lua

local randomMarioIndex = nil
local lastSafeCoords = { x = 0, y = 0, z = 0 }

---@param m MarioState
local function mario_update(m)

    if m.playerIndex ~= 0 then return end
    if gGlobalSyncTable.modifier ~= MODIFIER_SWAP then return end
    if gGlobalSyncTable.roundState ~= ROUND_ACTIVE then
        gGlobalSyncTable.swapTimer = 20 * 30
        return
    end

    if  gGlobalSyncTable.swapTimer <= 5 * 30
    and gPlayerSyncTable[0].state ~= SPECTATOR
    and gPlayerSyncTable[0].state ~= WILDCARD_ROLE
    and gPlayerSyncTable[0].state ~= -1 then
        -- select a random mario
        if randomMarioIndex == nil then
            randomMarioIndex = math.random(1, MAX_PLAYERS - 1)

            -- if that mario isn't "valid", select another mario
            while not gNetworkPlayers[randomMarioIndex].connected
            or gPlayerSyncTable[randomMarioIndex].state == WILDCARD_ROLE
            or gPlayerSyncTable[randomMarioIndex].state == SPECTATOR
            or gPlayerSyncTable[randomMarioIndex].state == -1 do
                randomMarioIndex = math.random(1, MAX_PLAYERS - 1)
            end
        end

        -- if the remote mario is in a safe position, set lastSafeCoords
        local remoteM = gMarioStates[randomMarioIndex]

        if  remoteM.action & ACT_GROUP_MASK ~= ACT_GROUP_AIRBORNE
        and m.floor and m.floor.type ~= SURFACE_DEATH_PLANE then
            vec3f_copy(lastSafeCoords, remoteM.pos)
        end

        if gGlobalSyncTable.swapTimer <= 0 then
            -- set invinc timer
            gPlayerSyncTable[m.playerIndex].invincTimer = 1 * 30 -- 1 second

            -- set the current pos to the last safe coordinates
            vec3f_copy(m.pos, lastSafeCoords)

            -- set peak height to avoid fall damage
            m.peakHeight = m.pos.y
        end
    else
        randomMarioIndex = nil
    end

    -- reduce swap timer
    if network_is_server() then
        if gGlobalSyncTable.swapTimer >= 0 then
            gGlobalSyncTable.swapTimer = gGlobalSyncTable.swapTimer - 1
        else
            gGlobalSyncTable.swapTimer = math.random(15 * 30, 30 * 30)
        end
    end
end

local function hud_render()
    if gPlayerSyncTable[0].state == SPECTATOR
    or gPlayerSyncTable[0].state == WILDCARD_ROLE then return end
    if gGlobalSyncTable.modifier ~= MODIFIER_SWAP then return end
    if gGlobalSyncTable.swapTimer > 5 * 30 then return end

    render_bar("Swapping in " .. math.floor(gGlobalSyncTable.swapTimer / 30) .. "s", gGlobalSyncTable.swapTimer, 0, 5 * 30, 255, 0, 0)
end

hook_event(HOOK_MARIO_UPDATE, mario_update)
hook_event(HOOK_ON_HUD_RENDER, hud_render)