--[[
| This file was obtained through the combined efforts
| of Madbluntz & Plymouth Antiquarian Society.
|
| Credits: lifestorm, Gregory Wayne Rossel JR.,
| 	Maloy, DrPepper10 @ RIP, Atle!
|
| Visit for more: https://plymouth.thetwilightzone.ru/
--]]

---- Trouble in Terrorist Town

AddCSLuaFile("cl_init.lua")
AddCSLuaFile("shared.lua")
AddCSLuaFile("cl_hud.lua")
AddCSLuaFile("cl_msgstack.lua")
AddCSLuaFile("cl_hudpickup.lua")
AddCSLuaFile("cl_keys.lua")
AddCSLuaFile("cl_wepswitch.lua")
AddCSLuaFile("cl_awards.lua")
AddCSLuaFile("cl_scoring_events.lua")
AddCSLuaFile("cl_scoring.lua")
AddCSLuaFile("cl_popups.lua")
AddCSLuaFile("cl_equip.lua")
AddCSLuaFile("equip_items_shd.lua")
AddCSLuaFile("cl_help.lua")
AddCSLuaFile("cl_scoreboard.lua")
AddCSLuaFile("cl_tips.lua")
AddCSLuaFile("cl_voice.lua")
AddCSLuaFile("scoring_shd.lua")
AddCSLuaFile("util.lua")
AddCSLuaFile("lang_shd.lua")
AddCSLuaFile("corpse_shd.lua")
AddCSLuaFile("player_ext_shd.lua")
AddCSLuaFile("weaponry_shd.lua")
AddCSLuaFile("cl_radio.lua")
AddCSLuaFile("cl_radar.lua")
AddCSLuaFile("cl_tbuttons.lua")
AddCSLuaFile("cl_disguise.lua")
AddCSLuaFile("cl_transfer.lua")
AddCSLuaFile("cl_search.lua")
AddCSLuaFile("cl_targetid.lua")
AddCSLuaFile("vgui/ColoredBox.lua")
AddCSLuaFile("vgui/SimpleIcon.lua")
AddCSLuaFile("vgui/ProgressBar.lua")
AddCSLuaFile("vgui/ScrollLabel.lua")
AddCSLuaFile("vgui/sb_main.lua")
AddCSLuaFile("vgui/sb_row.lua")
AddCSLuaFile("vgui/sb_team.lua")
AddCSLuaFile("vgui/sb_info.lua")

include("shared.lua")

include("karma.lua")
include("entity.lua")
include("radar.lua")
include("admin.lua")
include("traitor_state.lua")
include("propspec.lua")
include("weaponry.lua")
include("gamemsg.lua")
include("ent_replace.lua")
include("scoring.lua")
include("corpse.lua")
include("player_ext_shd.lua")
include("player_ext.lua")
include("player.lua")

-- Round times
CreateConVar("ttt_roundtime_minutes", "10", FCVAR_NOTIFY)
CreateConVar("ttt_preptime_seconds", "30", FCVAR_NOTIFY)
CreateConVar("ttt_posttime_seconds", "30", FCVAR_NOTIFY)
CreateConVar("ttt_firstpreptime", "60")

-- Haste mode
local ttt_haste = CreateConVar("ttt_haste", "1", FCVAR_NOTIFY)
CreateConVar("ttt_haste_starting_minutes", "5", FCVAR_NOTIFY)
CreateConVar("ttt_haste_minutes_per_death", "0.5", FCVAR_NOTIFY)

-- Player Spawning
CreateConVar("ttt_spawn_wave_interval", "0")

CreateConVar("ttt_traitor_pct", "0.25")
CreateConVar("ttt_traitor_max", "32")

CreateConVar("ttt_detective_pct", "0.13", FCVAR_NOTIFY)
CreateConVar("ttt_detective_max", "32")
CreateConVar("ttt_detective_min_players", "8")
local detective_karma_min = CreateConVar("ttt_detective_karma_min", "600")


-- Traitor credits
CreateConVar("ttt_credits_starting", "2")
CreateConVar("ttt_credits_award_pct", "0.35")
CreateConVar("ttt_credits_award_size", "1")
CreateConVar("ttt_credits_award_repeat", "1")
CreateConVar("ttt_credits_detectivekill", "1")

CreateConVar("ttt_credits_alonebonus", "1")

-- Detective credits
CreateConVar("ttt_det_credits_starting", "1")
CreateConVar("ttt_det_credits_traitorkill", "0")
CreateConVar("ttt_det_credits_traitordead", "1")

-- Other
CreateConVar("ttt_use_weapon_spawn_scripts", "1")
CreateConVar("ttt_weapon_spawn_count", "0")

CreateConVar("ttt_round_limit", "6", FCVAR_ARCHIVE + FCVAR_NOTIFY + FCVAR_REPLICATED)
CreateConVar("ttt_time_limit_minutes", "75", FCVAR_NOTIFY + FCVAR_REPLICATED)

CreateConVar("ttt_idle_limit", "180", FCVAR_NOTIFY)

CreateConVar("ttt_voice_drain", "0", FCVAR_NOTIFY)
CreateConVar("ttt_voice_drain_normal", "0.2", FCVAR_NOTIFY)
CreateConVar("ttt_voice_drain_admin", "0.05", FCVAR_NOTIFY)
CreateConVar("ttt_voice_drain_recharge", "0.05", FCVAR_NOTIFY)

CreateConVar("ttt_namechange_kick", "1", FCVAR_NOTIFY)
CreateConVar("ttt_namechange_bantime", "10")

local ttt_detective = CreateConVar("ttt_sherlock_mode", "1", FCVAR_ARCHIVE + FCVAR_NOTIFY)
local ttt_minply = CreateConVar("ttt_minimum_players", "2", FCVAR_ARCHIVE + FCVAR_NOTIFY)

-- debuggery
local ttt_dbgwin = CreateConVar("ttt_debug_preventwin", "0")

-- Localise stuff we use often. It's like Lua go-faster stripes.
local math = math
local table = table
local net = net
local player = player
local timer = timer
local util = util

-- Pool some network names.
util.AddNetworkString("TTT_RoundState")
util.AddNetworkString("TTT_RagdollSearch")
util.AddNetworkString("TTT_GameMsg")
util.AddNetworkString("TTT_GameMsgColor")
util.AddNetworkString("TTT_RoleChat")
util.AddNetworkString("TTT_TraitorVoiceState")
util.AddNetworkString("TTT_LastWordsMsg")
util.AddNetworkString("TTT_RadioMsg")
util.AddNetworkString("TTT_ReportStream")
util.AddNetworkString("TTT_ReportStream_Part")
util.AddNetworkString("TTT_LangMsg")
util.AddNetworkString("TTT_ServerLang")
util.AddNetworkString("TTT_Equipment")
util.AddNetworkString("TTT_Credits")
util.AddNetworkString("TTT_Bought")
util.AddNetworkString("TTT_BoughtItem")
util.AddNetworkString("TTT_InterruptChat")
util.AddNetworkString("TTT_PlayerSpawned")
util.AddNetworkString("TTT_PlayerDied")
util.AddNetworkString("TTT_CorpseCall")
util.AddNetworkString("TTT_ClearClientState")
util.AddNetworkString("TTT_PerformGesture")
util.AddNetworkString("TTT_Role")
util.AddNetworkString("TTT_RoleList")
util.AddNetworkString("TTT_ConfirmUseTButton")
util.AddNetworkString("TTT_C4Config")
util.AddNetworkString("TTT_C4DisarmResult")
util.AddNetworkString("TTT_C4Warn")
util.AddNetworkString("TTT_ShowPrints")
util.AddNetworkString("TTT_ScanResult")
util.AddNetworkString("TTT_FlareScorch")
util.AddNetworkString("TTT_Radar")
util.AddNetworkString("TTT_Spectate")
---- Round mechanics
function GM:Initialize()
   MsgN("Trouble In Terrorist Town gamemode initializing...")

   -- Force friendly fire to be enabled. If it is off, we do not get lag compensation.
   RunConsoleCommand("mp_friendlyfire", "1")

   -- Default crowbar unlocking settings, may be overridden by config entity
   GAMEMODE.crowbar_unlocks = {
      [OPEN_DOOR] = true,
      [OPEN_ROT] = true,
      [OPEN_BUT] = true,
      [OPEN_NOTOGGLE]= true
   };

   -- More map config ent defaults
   GAMEMODE.force_plymodel = ""
   GAMEMODE.propspec_allow_named = false

   GAMEMODE.MapWin = WIN_NONE
   GAMEMODE.AwardedCredits = false
   GAMEMODE.AwardedCreditsDead = 0

   GAMEMODE.round_state = ROUND_WAIT
   GAMEMODE.FirstRound = true
   GAMEMODE.RoundStartTime = 0

   GAMEMODE.DamageLog = {}
   GAMEMODE.LastRole = {}
   GAMEMODE.playermodel = GetRandomPlayerModel()
   GAMEMODE.playercolor = COLOR_WHITE

   -- Delay reading of cvars until config has definitely loaded
   GAMEMODE.cvar_init = false

   SetGlobalFloat("ttt_round_end", -1)
   SetGlobalFloat("ttt_haste_end", -1)

   -- For the paranoid
   math.randomseed(os.time())

   WaitForPlayers()

   if cvars.Number("sv_alltalk", 0) > 0 then
      ErrorNoHalt("TTT WARNING: sv_alltalk is enabled. Dead players will be able to talk to living players. TTT will now attempt to set sv_alltalk 0.\n")
      RunConsoleCommand("sv_alltalk", "0")
   end

   local cstrike = false
   for _, g in ipairs(engine.GetGames()) do
      if g.folder == 'cstrike' then cstrike = true end
   end
   if not cstrike then
      ErrorNoHalt("TTT WARNING: CS:S does not appear to be mounted by GMod. Things may break in strange ways. Server admin? Check the TTT readme for help.\n")
   end
end

-- Used to do this in Initialize, but server cfg has not always run yet by that
-- point.
function GM:InitCvars()
   MsgN("TTT initializing convar settings...")

   -- Initialize game state that is synced with client
   SetGlobalInt("ttt_rounds_left", GetConVar("ttt_round_limit"):GetInt())
   GAMEMODE:SyncGlobals()
   KARMA.InitState()

   self.cvar_init = true
end

function GM:InitPostEntity()
   WEPS.ForcePrecache()
end

-- Convar replication is broken in gmod, so we do this.
-- I don't like it any more than you do, dear reader.
function GM:SyncGlobals()
   SetGlobalBool("ttt_detective", ttt_detective:GetBool())
   SetGlobalBool("ttt_haste", ttt_haste:GetBool())
   SetGlobalInt("ttt_time_limit_minutes", GetConVar("ttt_time_limit_minutes"):GetInt())
   SetGlobalBool("ttt_highlight_admins", GetConVar("ttt_highlight_admins"):GetBool())
   SetGlobalBool("ttt_locational_voice", GetConVar("ttt_locational_voice"):GetBool())
   SetGlobalInt("ttt_idle_limit", GetConVar("ttt_idle_limit"):GetInt())

   SetGlobalBool("ttt_voice_drain", GetConVar("ttt_voice_drain"):GetBool())
   SetGlobalFloat("ttt_voice_drain_normal", GetConVar("ttt_voice_drain_normal"):GetFloat())
   SetGlobalFloat("ttt_voice_drain_admin", GetConVar("ttt_voice_drain_admin"):GetFloat())
   SetGlobalFloat("ttt_voice_drain_recharge", GetConVar("ttt_voice_drain_recharge"):GetFloat())
end

function SendRoundState(state, ply)
   net.Start("TTT_RoundState")
      net.WriteUInt(state, 3)
   return ply and net.Send(ply) or net.Broadcast()
end

-- Round state is encapsulated by set/get so that it can easily be changed to
-- eg. a networked var if this proves more convenient
function SetRoundState(state)
   GAMEMODE.round_state = state

   SCORE:RoundStateChange(state)

   SendRoundState(state)
end

function GetRoundState()
   return GAMEMODE.round_state
end

local function EnoughPlayers()
   local ready = 0
   -- only count truly available players, ie. no forced specs
   for _, ply in player.Iterator() do
      if IsValid(ply) and ply:ShouldSpawn() then
         ready = ready + 1
      end
   end
   return ready >= ttt_minply:GetInt()
end

-- Used to be in Think/Tick, now in a timer
function WaitingForPlayersChecker()
   if GetRoundState() == ROUND_WAIT then
      if EnoughPlayers() then
         timer.Create("wait2prep", 1, 1, PrepareRound)

         timer.Stop("waitingforply")
      end
   end
end

-- Start waiting for players
function WaitForPlayers()
   SetRoundState(ROUND_WAIT)

   if not timer.Start("waitingforply") then
      timer.Create("waitingforply", 2, 0, WaitingForPlayersChecker)
   end
end

-- When a player initially spawns after mapload, everything is a bit strange;
-- just making him spectator for some reason does not work right. Therefore,
-- we regularly check for these broken spectators while we wait for players
-- and immediately fix them.
function FixSpectators()
   for k, ply in player.Iterator() do
      if ply:IsSpec() and not ply:GetRagdollSpec() and ply:GetMoveType() < MOVETYPE_NOCLIP then
         ply:Spectate(OBS_MODE_ROAMING)
      end
   end
end

-- Used to be in think, now a timer
local function WinChecker()
   if GetRoundState() == ROUND_ACTIVE then
      if CurTime() > GetGlobalFloat("ttt_round_end", 0) then
         EndRound(WIN_TIMELIMIT)
      else
         local win = hook.Call("TTTCheckForWin", GAMEMODE)
         if win != WIN_NONE then
            EndRound(win)
         end
      end
   end
end

local function NameChangeKick()
   if not GetConVar("ttt_namechange_kick"):GetBool() then
      timer.Remove("namecheck")
      return
   end

   if GetRoundState() == ROUND_ACTIVE then
      for _, ply in ipairs(player.GetHumans()) do
         if ply.spawn_nick then
            if ply.has_spawned and ply.spawn_nick != ply:Nick() and not hook.Call("TTTNameChangeKick", GAMEMODE, ply) then
               local t = GetConVar("ttt_namechange_bantime"):GetInt()
               local msg = "Changed name during a round"
               if t > 0 then
                  ply:KickBan(t, msg)
               else
                  ply:Kick(msg)
               end
            end
         else
            ply.spawn_nick = ply:Nick()
         end
      end
   end
end

function StartNameChangeChecks()
   if not GetConVar("ttt_namechange_kick"):GetBool() then return end

   -- bring nicks up to date, may have been changed during prep/post
   for _, ply in player.Iterator() do
      ply.spawn_nick = ply:Nick()
   end

   if not timer.Exists("namecheck") then
      timer.Create("namecheck", 3, 0, NameChangeKick)
   end
end

function StartWinChecks()
   if not timer.Start("winchecker") then
      timer.Create("winchecker", 1, 0, WinChecker)
   end
end

function StopWinChecks()
   timer.Stop("winchecker")
end

local function CleanUp()
   local et = ents.TTT
   -- if we are going to import entities, it's no use replacing HL2DM ones as
   -- soon as they spawn, because they'll be removed anyway
   et.SetReplaceChecking(not et.CanImportEntities(game.GetMap()))

   et.FixParentedPreCleanup()

   game.CleanUpMap(false, nil, function() et.FixParentedPostCleanup() end)

   -- Strip players now, so that their weapons are not seen by ReplaceEntities
   for k,v in player.Iterator() do
      if IsValid(v) then
         v:StripWeapons()
      end
   end

   -- a different kind of cleanup
   hook.Remove("PlayerSay", "ULXMeCheck")
end

local function SpawnEntities()
   local et = ents.TTT
   -- Spawn weapons from script if there is one
   local import = et.CanImportEntities(game.GetMap())

   if import then
      et.ProcessImportScript(game.GetMap())
   else
      -- Replace HL2DM/ZM ammo/weps with our own
      et.ReplaceEntities()

      -- Populate CS:S/TF2 maps with extra guns
      et.PlaceExtraWeapons()
   end

   -- We're done resetting the map, unlock weapon pickups for the players about to respawn
   GAMEMODE.RespawningWeapons = false

   -- Finally, get players in there
   SpawnWillingPlayers()
end


local function StopRoundTimers()
   -- remove all timers
   timer.Stop("wait2prep")
   timer.Stop("prep2begin")
   timer.Stop("end2prep")
   timer.Stop("winchecker")
end

-- Make sure we have the players to do a round, people can leave during our
-- preparations so we'll call this numerous times
local function CheckForAbort()
   if not EnoughPlayers() then
      LANG.Msg("round_minplayers")
      StopRoundTimers()

      WaitForPlayers()
      return true
   end

   return false
end

function GM:TTTDelayRoundStartForVote()
   -- Can be used for custom voting systems
   --return true, 30
   return false
end

function PrepareRound()
   -- Check playercount
   if CheckForAbort() then return end

   local delay_round, delay_length = hook.Call("TTTDelayRoundStartForVote", GAMEMODE)

   if delay_round then
      delay_length = delay_length or 30

      LANG.Msg("round_voting", {num = delay_length})

      timer.Create("delayedprep", delay_length, 1, PrepareRound)
      return
   end

   -- Reset the map entities
   GAMEMODE.RespawningWeapons = true
   CleanUp()

   GAMEMODE.MapWin = WIN_NONE
   GAMEMODE.AwardedCredits = false
   GAMEMODE.AwardedCreditsDead = 0

   SCORE:Reset()

   -- Update damage scaling
   KARMA.RoundBegin()

   -- New look. Random if no forced model set.
   GAMEMODE.playermodel = GAMEMODE.force_plymodel == "" and GetRandomPlayerModel() or GAMEMODE.force_plymodel
   GAMEMODE.playercolor = hook.Call("TTTPlayerColor", GAMEMODE, GAMEMODE.playermodel)

   if CheckForAbort() then return end

   -- Schedule round start
   local ptime = GetConVar("ttt_preptime_seconds"):GetInt()
   if GAMEMODE.FirstRound then
      ptime = GetConVar("ttt_firstpreptime"):GetInt()
      GAMEMODE.FirstRound = false
   end

   -- Piggyback on "round end" time global var to show end of phase timer
   SetRoundEnd(CurTime() + ptime)

   timer.Create("prep2begin", ptime, 1, BeginRound)

   -- Mute for a second around traitor selection, to counter a dumb exploit
   -- related to traitor's mics cutting off for a second when they're selected.
   timer.Create("selectmute", ptime - 1, 1, function() MuteForRestart(true) end)

   LANG.Msg("round_begintime", {num = ptime})
   SetRoundState(ROUND_PREP)

   -- Delay spawning until next frame to avoid ent overload
   timer.Simple(0.01, SpawnEntities)

   -- Undo the roundrestart mute, though they will once again be muted for the
   -- selectmute timer.
   timer.Create("restartmute", 1, 1, function() MuteForRestart(false) end)

   net.Start("TTT_ClearClientState") net.Broadcast()

   -- In case client's cleanup fails, make client set all players to innocent role
   timer.Simple(1, SendRoleReset)

   -- Tell hooks and map we started prep
   hook.Call("TTTPrepareRound")

   ents.TTT.TriggerRoundStateOutputs(ROUND_PREP)
end

function SetRoundEnd(endtime)
   SetGlobalFloat("ttt_round_end", endtime)
end

function IncRoundEnd(incr)
   SetRoundEnd(GetGlobalFloat("ttt_round_end", 0) + incr)
end

function TellTraitorsAboutTraitors()
   local traitornicks = {}
   for k,v in player.Iterator() do
      if v:IsTraitor() then
         table.insert(traitornicks, v:Nick())
      end
   end

   -- This is ugly as hell, but it's kinda nice to filter out the names of the
   -- traitors themselves in the messages to them
   for k,v in player.Iterator() do
      if v:IsTraitor() then
         if #traitornicks < 2 then
            LANG.Msg(v, "round_traitors_one")
            return
         else
            local names = ""
            for i,name in ipairs(traitornicks) do
               if name != v:Nick() then
                  names = names .. name .. ", "
               end
            end
            names = string.sub(names, 1, -3)
            LANG.Msg(v, "round_traitors_more", {names = names})
         end
      end
   end
end


function SpawnWillingPlayers(dead_only)
   local wave_delay = GetConVar("ttt_spawn_wave_interval"):GetFloat()

   -- simple method, should make this a case of the other method once that has
   -- been tested.
   if wave_delay <= 0 or dead_only then
      for k, ply in player.Iterator() do
         if IsValid(ply) then
            ply:SpawnForRound(dead_only)
         end
      end
   else
      -- wave method
      local num_spawns = #GetSpawnEnts()

      local to_spawn = {}
      for _, ply in RandomPairs(player.GetAll()) do
         if IsValid(ply) and ply:ShouldSpawn() then
            table.insert(to_spawn, ply)
            GAMEMODE:PlayerSpawnAsSpectator(ply)
         end
      end

      local sfn = function()
                     local c = 0
                     -- fill the available spawnpoints with players that need
                     -- spawning
                     while c < num_spawns and #to_spawn > 0 do
                        for k, ply in ipairs(to_spawn) do
                           if IsValid(ply) and ply:SpawnForRound() then
                              -- a spawn ent is now occupied
                              c = c + 1
                           end
                           -- Few possible cases:
                           -- 1) player has now been spawned
                           -- 2) player should remain spectator after all
                           -- 3) player has disconnected
                           -- In all cases we don't need to spawn them again.
                           table.remove(to_spawn, k)

                           -- all spawn ents are occupied, so the rest will have
                           -- to wait for next wave
                           if c >= num_spawns then
                              break
                           end
                        end
                     end

                     MsgN("Spawned " .. c .. " players in spawn wave.")

                     if #to_spawn == 0 then
                        timer.Remove("spawnwave")
                        MsgN("Spawn waves ending, all players spawned.")
                     end
                  end

      MsgN("Spawn waves starting.")
      timer.Create("spawnwave", wave_delay, 0, sfn)

      -- already run one wave, which may stop the timer if everyone is spawned
      -- in one go
      sfn()
   end
end

local function InitRoundEndTime()
   -- Init round values
   local endtime = CurTime() + (GetConVar("ttt_roundtime_minutes"):GetInt() * 60)
   if HasteMode() then
      endtime = CurTime() + (GetConVar("ttt_haste_starting_minutes"):GetInt() * 60)
      -- this is a "fake" time shown to innocents, showing the end time if no
      -- one would have been killed, it has no gameplay effect
      SetGlobalFloat("ttt_haste_end", endtime)
   end

   SetRoundEnd(endtime)
end

function BeginRound()
   GAMEMODE:SyncGlobals()

   if CheckForAbort() then return end

   InitRoundEndTime()

   if CheckForAbort() then return end

   -- Respawn dumb people who died during prep
   SpawnWillingPlayers(true)

   -- Remove their ragdolls
   ents.TTT.RemoveRagdolls(true)

   -- Check for low-karma players that weren't banned on round end
   if KARMA.cv.autokick:GetBool() then KARMA.CheckAutoKickAll() end

   if CheckForAbort() then return end

   -- Select traitors & co. This is where things really start so we can't abort
   -- anymore.
   SelectRoles()
   LANG.Msg("round_selected")
   SendFullStateUpdate()

   -- Edge case where a player joins just as the round starts and is picked as
   -- traitor, but for whatever reason does not get the traitor state msg. So
   -- re-send after a second just to make sure everyone is getting it.
   timer.Simple(1, SendFullStateUpdate)
   timer.Simple(10, SendFullStateUpdate)

   SCORE:HandleSelection() -- log traitors and detectives

   -- Give the StateUpdate messages ample time to arrive
   timer.Simple(1.5, TellTraitorsAboutTraitors)
   timer.Simple(2.5, ShowRoundStartPopup)

   -- Start the win condition check timer
   StartWinChecks()
   StartNameChangeChecks()
   timer.Create("selectmute", 1, 1, function() MuteForRestart(false) end)

   GAMEMODE.DamageLog = {}
   GAMEMODE.RoundStartTime = CurTime()

   -- Sound start alarm
   SetRoundState(ROUND_ACTIVE)
   LANG.Msg("round_started")
   ServerLog("Round proper has begun...\n")

   GAMEMODE:UpdatePlayerLoadouts() -- needs to happen when round_active

   hook.Call("TTTBeginRound")

   ents.TTT.TriggerRoundStateOutputs(ROUND_BEGIN)
end

function PrintResultMessage(type)
   ServerLog("Round ended.\n")
   if type == WIN_TIMELIMIT then
      LANG.Msg("win_time")
      ServerLog("Result: timelimit reached, traitors lose.\n")
   elseif type == WIN_TRAITOR then
      LANG.Msg("win_traitor")
      ServerLog("Result: traitors win.\n")
   elseif type == WIN_INNOCENT then
      LANG.Msg("win_innocent")
      ServerLog("Result: innocent win.\n")
   else
      ServerLog("Result: unknown victory condition!\n")
   end
end

function CheckForMapSwitch()
   -- Check for mapswitch
   local rounds_left = math.max(0, GetGlobalInt("ttt_rounds_left", 6) - 1)
   SetGlobalInt("ttt_rounds_left", rounds_left)

   local time_left = math.max(0, (GetConVar("ttt_time_limit_minutes"):GetInt() * 60) - CurTime())
   local switchmap = false
   local nextmap = string.upper(game.GetMapNext())

   if rounds_left <= 0 then
      LANG.Msg("limit_round", {mapname = nextmap})
      switchmap = true
   elseif time_left <= 0 then
      LANG.Msg("limit_time", {mapname = nextmap})
      switchmap = true
   end

   if switchmap then
      timer.Stop("end2prep")
      timer.Simple(15, game.LoadNextMap)
   else
      LANG.Msg("limit_left", {num = rounds_left,
                              time = math.ceil(time_left / 60),
                              mapname = nextmap})
   end
end

function EndRound(type)
   PrintResultMessage(type)

   -- first handle round end
   SetRoundState(ROUND_POST)

   local ptime = math.max(5, GetConVar("ttt_posttime_seconds"):GetInt())
   LANG.Msg("win_showreport", {num = ptime})
   timer.Create("end2prep", ptime, 1, PrepareRound)

   -- Piggyback on "round end" time global var to show end of phase timer
   SetRoundEnd(CurTime() + ptime)

   timer.Create("restartmute", ptime - 1, 1, function() MuteForRestart(true) end)

   -- Stop checking for wins
   StopWinChecks()

   -- We may need to start a timer for a mapswitch, or start a vote
   CheckForMapSwitch()

   KARMA.RoundEnd()

   -- now handle potentially error prone scoring stuff

   -- register an end of round event
   SCORE:RoundComplete(type)

   -- update player scores
   SCORE:ApplyEventLogScores(type)

   -- send the clients the round log, players will be shown the report
   SCORE:StreamToClients()

   -- server plugins might want to start a map vote here or something
   -- these hooks are not used by TTT internally
   hook.Call("TTTEndRound", GAMEMODE, type)

   ents.TTT.TriggerRoundStateOutputs(ROUND_POST, type)
end

function GM:MapTriggeredEnd(wintype)
   self.MapWin = wintype
end

-- The most basic win check is whether both sides have one dude alive
function GM:TTTCheckForWin()
   if ttt_dbgwin:GetBool() then return WIN_NONE end

   if GAMEMODE.MapWin == WIN_TRAITOR or GAMEMODE.MapWin == WIN_INNOCENT then
      local mw = GAMEMODE.MapWin
      GAMEMODE.MapWin = WIN_NONE
      return mw
   end

   local traitor_alive = false
   local innocent_alive = false
   for k,v in player.Iterator() do
      if v:Alive() and v:IsTerror() then
         if v:GetTraitor() then
            traitor_alive = true
         else
            innocent_alive = true
         end
      end

      if traitor_alive and innocent_alive then
         return WIN_NONE --early out
      end
   end

   if traitor_alive and not innocent_alive then
      return WIN_TRAITOR
   elseif not traitor_alive and innocent_alive then
      return WIN_INNOCENT
   elseif not innocent_alive then
      -- ultimately if no one is alive, traitors win
      return WIN_TRAITOR
   end

   return WIN_NONE
end

local function GetTraitorCount(ply_count)
   -- get number of traitors: pct of players rounded down
   local traitor_count = math.floor(ply_count * GetConVar("ttt_traitor_pct"):GetFloat())
   -- make sure there is at least 1 traitor
   traitor_count = math.Clamp(traitor_count, 1, GetConVar("ttt_traitor_max"):GetInt())

   return traitor_count
end


local function GetDetectiveCount(ply_count)
   if ply_count < GetConVar("ttt_detective_min_players"):GetInt() then return 0 end

   local det_count = math.floor(ply_count * GetConVar("ttt_detective_pct"):GetFloat())
   -- limit to a max
   det_count = math.Clamp(det_count, 1, GetConVar("ttt_detective_max"):GetInt())

   return det_count
end


function SelectRoles()
   local choices = {}
   local prev_roles = {
      [ROLE_INNOCENT] = {},
      [ROLE_TRAITOR] = {},
      [ROLE_DETECTIVE] = {}
   };

   if not GAMEMODE.LastRole then GAMEMODE.LastRole = {} end

   for k,v in player.Iterator() do
      -- everyone on the spec team is in specmode
      if IsValid(v) and (not v:IsSpec()) then
         -- save previous role and sign up as possible traitor/detective

         local r = GAMEMODE.LastRole[v:SteamID64()] or v:GetRole() or ROLE_INNOCENT

         table.insert(prev_roles[r], v)

         table.insert(choices, v)
      end

      v:SetRole(ROLE_INNOCENT)
   end

   -- determine how many of each role we want
   local choice_count = #choices
   local traitor_count = GetTraitorCount(choice_count)
   local det_count = GetDetectiveCount(choice_count)

   if choice_count == 0 then return end

   -- first select traitors
   local ts = 0
   while (ts < traitor_count) and (#choices >= 1) do
      -- select random index in choices table
      local pick = math.random(1, #choices)

      -- the player we consider
      local pply = choices[pick]

      -- make this guy traitor if he was not a traitor last time, or if he makes
      -- a roll
      if IsValid(pply) and
         ((not table.HasValue(prev_roles[ROLE_TRAITOR], pply)) or (math.random(1, 3) == 2)) then
         pply:SetRole(ROLE_TRAITOR)

         table.remove(choices, pick)
         ts = ts + 1
      end
   end

   -- now select detectives, explicitly choosing from players who did not get
   -- traitor, so becoming detective does not mean you lost a chance to be
   -- traitor
   local ds = 0
   local min_karma = detective_karma_min:GetInt()
   while (ds < det_count) and (#choices >= 1) do

      -- sometimes we need all remaining choices to be detective to fill the
      -- roles up, this happens more often with a lot of detective-deniers
      if #choices <= (det_count - ds) then
         for k, pply in ipairs(choices) do
            if IsValid(pply) then
               pply:SetRole(ROLE_DETECTIVE)
            end
         end

         break -- out of while
      end


      local pick = math.random(1, #choices)
      local pply = choices[pick]

      -- we are less likely to be a detective unless we were innocent last round
      if (IsValid(pply) and
          ((pply:GetBaseKarma() > min_karma and
           table.HasValue(prev_roles[ROLE_INNOCENT], pply)) or
           math.random(1,3) == 2)) then

         -- if a player has specified he does not want to be detective, we skip
         -- him here (he might still get it if we don't have enough
         -- alternatives)
         if not pply:GetAvoidDetective() then
            pply:SetRole(ROLE_DETECTIVE)
            ds = ds + 1
         end

         table.remove(choices, pick)
      end
   end

   GAMEMODE.LastRole = {}

   for _, ply in player.Iterator() do
      -- initialize credit count for everyone based on their role
      ply:SetDefaultCredits()

      -- store a steamid64 -> role map
      GAMEMODE.LastRole[ply:SteamID64()] = ply:GetRole()
   end
end


local function ForceRoundRestart(ply, command, args)
   -- ply is nil on dedicated server console
   if (not IsValid(ply)) or ply:IsAdmin() or ply:IsSuperAdmin() or cvars.Bool("sv_cheats", 0) then
      LANG.Msg("round_restart")

      StopRoundTimers()

      -- do prep
      PrepareRound()
   else
      ply:PrintMessage(HUD_PRINTCONSOLE, "You must be a GMod Admin or SuperAdmin on the server to use this command, or sv_cheats must be enabled.")
   end
end
concommand.Add("ttt_roundrestart", ForceRoundRestart)

function ShowVersion(ply)
   local text = Format("This is TTT version %s\n", GAMEMODE.Version)
   if IsValid(ply) then
      ply:PrintMessage(HUD_PRINTNOTIFY, text)
   else
      Msg(text)
   end
end
concommand.Add("ttt_version", ShowVersion)