--
-- racemidvote_server.lua
--
-- Mid-race random map vote and
-- NextMapVote handled in this file
--

local lastVoteStarterName = ''
local lastVoteStarterCount = 0
g_ForcedNextMap = false

----------------------------------------------------------------------------
-- displayHilariarseMessage
--
-- Comedy gold
----------------------------------------------------------------------------
function displayHilariarseMessage( player )
    if not player then
        lastVoteStarterName = ''
    else
        local playerName = getPlayerName(player)
        local msg = ''
        if playerName == lastVoteStarterName then
            lastVoteStarterCount = lastVoteStarterCount + 1
            if lastVoteStarterCount == 5 then
                msg = playerName .. ' started a vote. Hardly a suprise.'
            elseif lastVoteStarterCount == 10 then
                msg = 'Guess what! '..playerName .. ' started ANOTHER vote!'
            elseif lastVoteStarterCount < 5 then
                msg = playerName .. ' started another vote.'
            else
                msg = playerName .. ' continues to abuse the vote system.'
            end
        else
            lastVoteStarterCount = 0
            lastVoteStarterName = playerName
            msg = playerName .. ' started a vote.'
        end
        outputRace( msg )
    end
end


----------------------------------------------------------------------------
-- displayKillerPunchLine
--
-- Sewing kits available in the foyer
----------------------------------------------------------------------------
function displayKillerPunchLine( player )
    if lastVoteStarterName ~= '' then
        outputRace( 'Offical news: Everybody hates ' .. lastVoteStarterName )
    end
end


----------------------------------------------------------------------------
-- startMidMapVoteForRandomMap
--
-- Start the vote menu if during a race and more than 30 seconds from the end
-- No messages if this was not started by a player
----------------------------------------------------------------------------
function startMidMapVoteForRandomMap(player)

    -- Check state and race time left
    if not stateAllowsRandomMapVote() or g_CurrentRaceMode:getTimeRemaining() < 30000 then
        if player then
            outputRace( "I'm afraid I can't let you do that, " .. getPlayerName(player) .. ".", player )
        end
        return
    end

    displayHilariarseMessage( player )
    exports.votemanager:stopPoll()

    -- Actual vote started here
    local pollDidStart = exports.votemanager:startPoll {
            title='Do you want to change to a random map?',
            percentage=51,
            timeout=15,
            allowchange=true,
            visibleTo=getRootElement(),
            [1]={'Yes', 'midMapVoteResult', getRootElement(), true},
            [2]={'No', 'midMapVoteResult', getRootElement(), false;default=true},
    }

    -- Change state if vote did start
    if pollDidStart then
        gotoState('MidMapVote')
    end

end
addCommandHandler('new',startMidMapVoteForRandomMap)


----------------------------------------------------------------------------
-- event midMapVoteResult
--
-- Called from the votemanager when the poll has completed
----------------------------------------------------------------------------
addEvent('midMapVoteResult')
addEventHandler('midMapVoteResult', getRootElement(),
    function( votedYes )
        -- Change state back
        if stateAllowsRandomMapVoteResult() then
            gotoState('Running')
            if votedYes then
                startRandomMap()
            else
                displayKillerPunchLine()
            end
        end
    end
)



----------------------------------------------------------------------------
-- startRandomMap
--
-- Changes the current map to a random race map
----------------------------------------------------------------------------
function startRandomMap()

    -- Handle forced nextmap setting
    if maybeApplyForcedNextMap() then
        return
    end

    -- Get a random map chosen from the 10% of least recently player maps, with enough spawn points for all the players (if required)
    local map = getRandomMapCompatibleWithGamemode( getThisResource(), 10, g_GameOptions.ghostmode and 0 or getTotalPlayerCount() )
    if map then
        g_IgnoreSpawnCountProblems = map    -- Uber hack 4000
        if not exports.mapmanager:changeGamemodeMap ( map, nil, true ) then
            problemChangingMap()
        end
    else
        outputWarning( 'startRandomMap failed' )
    end
end
addEvent("chooseRandomMap",true)
addEventHandler("chooseRandomMap",root,startRandomMap)


----------------------------------------------------------------------------
-- outputRace
--
-- Race color is defined in the settings
----------------------------------------------------------------------------
function outputRace(message, toElement)
    toElement = toElement or g_Root
    local r, g, b = getColorFromString(string.upper(get("color")))
    if getElementType(toElement) == 'console' then
        outputServerLog(message)
    else
        if toElement == rootElement then
            outputServerLog(message)
        end
        if getElementType(toElement) == 'player' then
            message = '[PM] ' .. message
        end
        outputChatBox(message, toElement, r, g, b)
    end
end


----------------------------------------------------------------------------
-- problemChangingMap
--
-- Sort it
----------------------------------------------------------------------------
function problemChangingMap()
    outputRace( 'Changing to random map in 5 seconds' )
    local currentMap = exports.mapmanager:getRunningGamemodeMap()
    TimerManager.createTimerFor("resource","mapproblem"):setTimer(
        function()
            -- Check that something else hasn't already changed the map
            if currentMap == exports.mapmanager:getRunningGamemodeMap() then
                startRandomMap()
            end
        end,
        math.random(4500,5500), 1 )
end



--
--
-- NextMapVote
--
--
--

local g_Poll

----------------------------------------------------------------------------
-- startNextMapVote
--
-- Start a votemap for the next map. Should only be called during the
-- race state 'NextMapSelect'
----------------------------------------------------------------------------
function startNextMapVote()

    exports.votemanager:stopPoll()

    -- Handle forced nextmap setting
    if maybeApplyForcedNextMap() then
        return
    end

    -- Get all maps
    local compatibleMaps = exports.mapmanager:getMapsCompatibleWithGamemode(getThisResource())

    -- limit it to eight random maps
    if #compatibleMaps > 8 then
        math.randomseed(getTickCount())
        repeat
            table.remove(compatibleMaps, math.random(1, #compatibleMaps))
        until #compatibleMaps == 8
    elseif #compatibleMaps < 2 then
        return false, errorCode.onlyOneCompatibleMap
    end

    -- mix up the list order
    for i,map in ipairs(compatibleMaps) do
        local swapWith = math.random(1, #compatibleMaps)
        local temp = compatibleMaps[i]
        compatibleMaps[i] = compatibleMaps[swapWith]
        compatibleMaps[swapWith] = temp
    end

    local poll = {
        title="Choose the next map:",
        visibleTo=getRootElement(),
        percentage=51,
        timeout=15,
        allowchange=true;
        }

    table.insert(poll, {"Random", 'chooseRandomMap', getRootElement()})
    for index, map in ipairs(compatibleMaps) do
        local mapName = getResourceInfo(map, "name") or getResourceName(map)
        table.insert(poll, {mapName, 'nextMapVoteResult', getRootElement(), map})
    end

    local currentMap = exports.mapmanager:getRunningGamemodeMap()
    if currentMap then
        table.insert(poll, {"Play again", 'nextMapVoteResult', getRootElement(), currentMap})
    end

    -- Allow addons to modify the poll
    g_Poll = poll
    triggerEvent('onPollStarting', g_Root, poll )
    poll = g_Poll
    g_Poll = nil

    local pollDidStart = exports.votemanager:startPoll(poll)

    if pollDidStart then
        gotoState('NextMapVote')
        addEventHandler("onPollEnd", getRootElement(), chooseRandomMap)
    end

    return pollDidStart
end


-- Used by addons in response to onPollStarting
addEvent('onPollModified')
addEventHandler('onPollModified', getRootElement(),
    function( poll )
        g_Poll = poll
    end
)


function chooseRandomMap (chosen)
    if not chosen then
        cancelEvent()
        math.randomseed(getTickCount())
        exports.votemanager:finishPoll(1)
    end
    removeEventHandler("onPollEnd", getRootElement(), chooseRandomMap)
end



----------------------------------------------------------------------------
-- event nextMapVoteResult
--
-- Called from the votemanager when the poll has completed
----------------------------------------------------------------------------
addEvent('nextMapVoteResult')
addEventHandler('nextMapVoteResult', getRootElement(),
    function( map )
        if stateAllowsNextMapVoteResult() then
            if not exports.mapmanager:changeGamemodeMap ( map, nil, true ) then
                problemChangingMap()
            end
        end
    end
)



----------------------------------------------------------------------------
-- startMidMapVoteForRestartMap
--
-- Start the vote menu to restart the current map if during a race
-- No messages if this was not started by a player
----------------------------------------------------------------------------
function startMidMapVoteForRestartMap(player)

    -- Check state and race time left
    if not stateAllowsRestartMapVote() then
        if player then
            outputRace( "I'm afraid I can't let you do that, " .. getPlayerName(player) .. ".", player )
        end
        return
    end

    displayHilariarseMessage( player )
    exports.votemanager:stopPoll()

    -- Actual vote started here
    local pollDidStart = exports.votemanager:startPoll {
            title='Do you want to restart the current map?',
            percentage=51,
            timeout=15,
            allowchange=true,
            visibleTo=getRootElement(),
            [1]={'Yes', 'midMapRestartVoteResult', getRootElement(), true},
            [2]={'No', 'midMapRestartVoteResult', getRootElement(), false;default=true},
    }

    -- Change state if vote did start
    if pollDidStart then
        gotoState('MidMapVote')
    end

end
addCommandHandler('voteredo',startMidMapVoteForRestartMap)


----------------------------------------------------------------------------
-- event midMapRestartVoteResult
--
-- Called from the votemanager when the poll has completed
----------------------------------------------------------------------------
addEvent('midMapRestartVoteResult')
addEventHandler('midMapRestartVoteResult', getRootElement(),
    function( votedYes )
        -- Change state back
        if stateAllowsRandomMapVoteResult() then
            gotoState('Running')
            if votedYes then
                if not exports.mapmanager:changeGamemodeMap ( exports.mapmanager:getRunningGamemodeMap(), nil, true ) then
                    problemChangingMap()
                end
            else
                displayKillerPunchLine()
            end
        end
    end
)

addCommandHandler('redo',
    function( player, command, value )
        if isPlayerInACLGroup(player, g_GameOptions.admingroup) then
            local currentMap = exports.mapmanager:getRunningGamemodeMap()
            if currentMap then
                outputChatBox('Map restarted by ' .. getPlayerName(player), g_Root, 0, 240, 0)
                if not exports.mapmanager:changeGamemodeMap (currentMap, nil, true) then
                    problemChangingMap()
                end
            else
                outputRace("You can't restart the map because no map is running", player)
            end
        else
            outputRace("You are not an Admin", player)
        end
    end
)


addCommandHandler('random',
    function( player, command, value )
        if isPlayerInACLGroup(player, g_GameOptions.admingroup) then
            if not stateAllowsRandomMapVote() or g_CurrentRaceMode:getTimeRemaining() < 1000 then
                outputRace( "Random command only works during a race and when no polls are running.", player )
            else
                local choice = {'curtailed', 'cut short', 'terminated', 'given the heave ho', 'dropkicked', 'expunged', 'put out of our misery', 'got rid of'}
                outputChatBox('Current map ' .. choice[math.random( 1, #choice )] .. ' by ' .. getPlayerName(player), g_Root, 0, 240, 0)
                startRandomMap()
            end
        end
    end
)


----------------------------------------------------------------------------
-- maybeApplyForcedNextMap
--
-- Returns true if nextmap did override
----------------------------------------------------------------------------
function maybeApplyForcedNextMap()
    if g_ForcedNextMap then
        local map = g_ForcedNextMap
        g_ForcedNextMap = nil
        g_IgnoreSpawnCountProblems = map    -- Uber hack 4000
        if not exports.mapmanager:changeGamemodeMap ( map, nil, true ) then
            outputWarning( 'Forced next map failed' )
            return false
        end
        return true
    end
    return false
end

---------------------------------------------------------------------------
--
-- Testing
--
--
--
---------------------------------------------------------------------------
addCommandHandler('forcevote',
    function( player, command, value )
        if not _TESTING and not isPlayerInACLGroup(player, g_GameOptions.admingroup) then
            return
        end
        startNextMapVote()
    end
)


---------------------------------------------------------------------------
--
-- getRandomMapCompatibleWithGamemode
--
-- This should go in mapmanager, but ACL needs doing
--
---------------------------------------------------------------------------

addEventHandler('onResourceStart', getRootElement(),
    function( res )
        if exports.mapmanager:isMap( res ) then
            setMapLastTimePlayed( res )
        end
    end
)

function getRandomMapCompatibleWithGamemode( gamemode, oldestPercentage, minSpawnCount )

    -- Get all relevant maps
    local compatibleMaps = exports.mapmanager:getMapsCompatibleWithGamemode( gamemode )

    if #compatibleMaps == 0 then
        outputDebugString( 'getRandomMapCompatibleWithGamemode: No maps.', 1 )
        return false
    end

    -- Sort maps by time since played
    local sortList = {}
    for i,map in ipairs(compatibleMaps) do
        sortList[i] = {}
        sortList[i].map = map
        sortList[i].lastTimePlayed = getMapLastTimePlayed( map )
    end

    table.sort( sortList, function(a, b) return a.lastTimePlayed > b.lastTimePlayed end )

    -- Use the bottom n% of maps as the initial selection pool
    local cutoff = #sortList - math.floor( #sortList * oldestPercentage / 100 )

    outputDebug( 'RANDMAP', 'getRandomMapCompatibleWithGamemode' )
    outputDebug( 'RANDMAP', ''
            .. ' minSpawns:' .. tostring( minSpawnCount )
            .. ' nummaps:' .. tostring( #sortList )
            .. ' cutoff:' .. tostring( cutoff )
            .. ' poolsize:' .. tostring( #sortList - cutoff + 1 )
            )

    math.randomseed( getTickCount() % 50000 )
    local fallbackMap
    while #sortList > 0 do
        -- Get random item from range
        local idx = math.random( cutoff, #sortList )
        local map = sortList[idx].map

        if not minSpawnCount or minSpawnCount <= getMapSpawnPointCount( map ) then
            outputDebug( 'RANDMAP', ''
                    .. ' ++ using map:' .. tostring( getResourceName( map ) )
                    .. ' spawns:' .. tostring( getMapSpawnPointCount( map ) )
                    .. ' age:' .. tostring( getRealTimeSeconds() - getMapLastTimePlayed( map ) )
                    )
            return map
        end

        -- Remember best match incase we cant find any with enough spawn points
        if not fallbackMap or getMapSpawnPointCount( fallbackMap ) < getMapSpawnPointCount( map ) then
            fallbackMap = map
        end

        outputDebug( 'RANDMAP', ''
                .. ' skip:' .. tostring( getResourceName( map ) )
                .. ' spawns:' .. tostring( getMapSpawnPointCount( map ) )
                .. ' age:' .. tostring( getRealTimeSeconds() - getMapLastTimePlayed( map ) )
                )

        -- If map not good enough, remove from the list and try another
        table.remove( sortList, idx )
        -- Move cutoff up the list if required
        cutoff = math.min( cutoff, #sortList )
    end

    -- No maps found - use best match
    outputDebug( 'RANDMAP', ''
            .. ' ** fallback map:' .. tostring( getResourceName( fallbackMap ) )
            .. ' spawns:' .. tostring( getMapSpawnPointCount( fallbackMap ) )
            .. ' ageLstPlyd:' .. tostring( getRealTimeSeconds() - getMapLastTimePlayed( fallbackMap ) )
            )
    return fallbackMap
end

-- Look for spawnpoints in map file
-- Not very quick as it loads the map file everytime
function countSpawnPointsInMap(res)
    local count = 0
    local meta = xmlLoadFile(':' .. getResourceName(res) .. '/' .. 'meta.xml')
    if meta then
        local mapnode = xmlFindChild(meta, 'map', 0) or xmlFindChild(meta, 'race', 0)
        local filename = mapnode and xmlNodeGetAttribute(mapnode, 'src')
        xmlUnloadFile(meta)
        if filename then
            local map = xmlLoadFile(':' .. getResourceName(res) .. '/' .. filename)
            if map then
                while xmlFindChild(map, 'spawnpoint', count) do
                    count = count + 1
                end
                xmlUnloadFile(map)
            end
        end
    end
    return count
end

---------------------------------------------------------------------------
-- g_MapInfoList access
---------------------------------------------------------------------------
local g_MapInfoList

function getMapLastTimePlayed( map )
    local mapInfo = getMapInfo( map )
    return mapInfo.lastTimePlayed or 0
end

function setMapLastTimePlayed( map, time )
    time = time or getRealTimeSeconds()
    local mapInfo = getMapInfo( map )
    mapInfo.lastTimePlayed = time
    mapInfo.playedCount = ( mapInfo.playedCount or 0 ) + 1
    saveMapInfoItem( map, mapInfo )
end

function getMapSpawnPointCount( map )
    local mapInfo = getMapInfo( map )
    if not mapInfo.spawnPointCount then
        mapInfo.spawnPointCount = countSpawnPointsInMap( map )
        saveMapInfoItem( map, mapInfo )
    end
    return mapInfo.spawnPointCount
end

function getMapInfo( map )
    if not g_MapInfoList then
        loadMapInfoAll()
    end
    if not g_MapInfoList[map] then
        g_MapInfoList[map] = {}
    end
    local mapInfo = g_MapInfoList[map]
    if mapInfo.loadTime ~= getResourceLoadTime(map) then
        -- Reset or clear data that may change between loads
        mapInfo.loadTime = getResourceLoadTime( map )
        mapInfo.spawnPointCount = false
    end
    return mapInfo
end


---------------------------------------------------------------------------
-- g_MapInfoList <-> database
---------------------------------------------------------------------------
function sqlString(value)
    value = tostring(value) or ''
    return "'" .. value:gsub( "(['])", "''" ) .. "'"
end

function sqlInt(value)
    return tonumber(value) or 0
end

function getTableName(value)
    return sqlString( 'race_mapmanager_maps' )
end

function ensureTableExists()
    local cmd = ( 'CREATE TABLE IF NOT EXISTS ' .. getTableName() .. ' ('
                     .. 'resName TEXT UNIQUE'
                     .. ', infoName TEXT '
                     .. ', spawnPointCount INTEGER'
                     .. ', playedCount INTEGER'
                     .. ', lastTimePlayedText TEXT'
                     .. ', lastTimePlayed INTEGER'
            .. ')' )
    executeSQLQuery( cmd )
end

-- Load all rows into g_MapInfoList
function loadMapInfoAll()
    ensureTableExists()
    local rows = executeSQLQuery( 'SELECT * FROM ' .. getTableName() )
    g_MapInfoList = {}
    for i,row in ipairs(rows) do
        local map = getResourceFromName( row.resName )
        if map then
            local mapInfo = getMapInfo( map )
            mapInfo.playedCount = row.playedCount
            mapInfo.lastTimePlayed = row.lastTimePlayed
        end
    end
end

-- Save one row
function saveMapInfoItem( map, info )
    executeSQLQuery( 'BEGIN TRANSACTION' )

    ensureTableExists()

    local cmd = ( 'INSERT OR IGNORE INTO ' .. getTableName() .. ' VALUES ('
                    .. ''       .. sqlString( getResourceName( map ) )
                    .. ','      .. sqlString( "" )
                    .. ','      .. sqlInt( 0 )
                    .. ','      .. sqlInt( 0 )
                    .. ','      .. sqlString( "" )
                    .. ','      .. sqlInt( 0 )
            .. ')' )
    executeSQLQuery( cmd )

    cmd = ( 'UPDATE ' .. getTableName() .. ' SET '
                    .. 'infoName='              .. sqlString( getResourceInfo( map, "name" ) )
                    .. ',spawnPointCount='      .. sqlInt( info.spawnPointCount )
                    .. ',playedCount='          .. sqlInt( info.playedCount )
                    .. ',lastTimePlayedText='   .. sqlString( info.lastTimePlayed and info.lastTimePlayed > 0 and getRealDateTimeString(getRealTime(info.lastTimePlayed)) or "-" )
                    .. ',lastTimePlayed='       .. sqlInt( info.lastTimePlayed )
            .. ' WHERE '
                    .. 'resName='               .. sqlString( getResourceName( map ) )
             )
    executeSQLQuery( cmd )

    executeSQLQuery( 'END TRANSACTION' )
end



---------------------------------------------------------------------------
--
-- More things that should go in mapmanager
--
---------------------------------------------------------------------------

addCommandHandler('checkmap',
    function( player, command, ... )
        local query = #{...}>0 and table.concat({...},' ') or nil
        if query then
            local map, errormsg = findMap( query )
            outputRace( errormsg, player )
        end
    end
)

addCommandHandler('nextmap',
    function( player, command, ... )
        local query = #{...}>0 and table.concat({...},' ') or nil
        if not query then
            if g_ForcedNextMap then
                outputRace( 'Next map is ' .. getMapName( g_ForcedNextMap ), player )
            else
                outputRace( 'Next map is not set', player )
            end
            return
        end
        if not _TESTING and not isPlayerInACLGroup(player, g_GameOptions.admingroup) then
            return
        end
        local map, errormsg = findMap( query )
        if not map then
            outputRace( errormsg, player )
            return
        end
        if g_ForcedNextMap == map then
            outputRace( 'Next map is already set to ' .. getMapName( g_ForcedNextMap ), player )
            return
        end
        g_ForcedNextMap = map
        outputChatBox('Next map set to ' .. getMapName( g_ForcedNextMap ) .. ' by ' .. getPlayerName( player ), g_Root, 0, 240, 0)
    end
)

--Find a map which matches, or nil and a text message if there is not one match
function findMap( query )
    local maps = findMaps( query )

    -- Make status string
    local status = "Found " .. #maps .. " match" .. ( #maps==1 and "" or "es" )
    for i=1,math.min(5,#maps) do
        status = status .. ( i==1 and ": " or ", " ) .. "'" .. getMapName( maps[i] ) .. "'"
    end
    if #maps > 5 then
        status = status .. " (" .. #maps - 5 .. " more)"
    end

    if #maps == 0 then
        return nil, status .. " for '" .. query .. "'"
    end
    if #maps == 1 then
        return maps[1], status
    end
    if #maps > 1 then
        return nil, status
    end
end

-- Find all maps which match the query string
function findMaps( query )
    local results = {}
    --escape all meta chars
    query = string.gsub(query, "([%*%+%?%.%(%)%[%]%{%}%\%/%|%^%$%-])","%%%1")
    -- Loop through and find matching maps
    for i,resource in ipairs(exports.mapmanager:getMapsCompatibleWithGamemode(getThisResource())) do
        local resName = getResourceName( resource )
        local infoName = getMapName( resource  )

        -- Look for exact match first
        if query == resName or query == infoName then
            return {resource}
        end

        -- Find match for query within infoName
        if string.find( infoName:lower(), query:lower() ) then
            table.insert( results, resource )
        end
    end
    return results
end

function getMapName( map )
    return getResourceInfo( map, "name" ) or getResourceName( map ) or "unknown"
end