local ZombieLimit = 10;
local ZombieStreaming = 0;
local ZombieSpeed = 2;
local moancount = 0;
local moanlimit = 10;
local chaseanim = "fatsprint"; --"Run_Wuzi";
local chaseblock = "fat"; --"ped";
local checkspeed = 100;
local everyZombie = {};
local zombiePedSkins = {
    13,22,56,67,68,69,
    70,92,97,105,107,
    108,126,127,128
};
local itemTableZombies = {
    {"Box of Matches", 5},
    {"Wood Pile", 5},
    {"M1911", 0.4},
    {"PDW", 0.3},
    {"Hunting Knife", 7},
    {"Hatchet", 7},
    {"Pizza", 7},
    {"Soda Bottle", 7},
    {"MP5A5", 0.1},
    {"Empty Gas Canister", 5},
    {"Roadflare", 9},
    {"Baseball Bat", 0.5},
    {"Milk", 5},
    {"Assault Pack (ACU)", 6},
    {"Painkiller", 7},
    {"M9 SD", 0.4},
    {"Empty Soda Cans", 6},
    {"Scruffy Burgers", 6},
    {"Grenade", 0.5},
    {"Desert Eagle", 0.3},
    {"Sawn-Off Shotgun", 0.2},
    {"SPAZ-12 Combat Shotgun", 0.2},
    {"Watch", 3},
    {"Heat Pack", 6},
    {"Wire Fence", 1},
    {"Winchester 1866", 0.4},
    {"Alice Pack", 0.5},
    {"Tire", 1},
    {"Morphine", 2},
    {"Civilian Clothing", 12},
    {"Map", 4},
    {"Golf Club", 0.5},
    {"GPS", 1},
    {"Pasta Can", 5},
    {"Beans Can", 5},
    {"SKS-45", 0.2},
    {"Burger", 2},
    {"Radio Device", 3},
    {"Shovel", 0.5}
};

addEvent("onZombieSpawn", true);
addEvent("onZombieLostPlayer", true);
addEvent("onZombieGetsKilled", true);
addEvent("createZomieForPlayer", true);


function table.getn(table)
    return #table;
end

function Zomb_Idle(ped)
    if isElement(ped) then
        if (getElementData(ped, "status") == "idle") and not isPedDead(ped) and getElementData(ped, "zombie") then
            local action = math.random(1, 6);
            if (action < 4) then
                local rdmangle = math.random(1, 359);
                setElementRotation(ped, 0, 0, rdmangle);
                setPedAnimation(ped, "PED", "Player_Sneak", -1, true, true, true);
                setTimer(Zomb_Idle, 7000, 1, ped);
            elseif (action == 4) then
                setPedAnimation(ped, "MEDIC", "cpr", -1, false, true, true);
                setTimer(Zomb_Idle, 4000, 1, ped);
            elseif (action == 5) then
                setPedAnimation(ped);
                setTimer(Zomb_Idle, 4000, 1, ped);
            end
        end
    end
end

function chaseAnim(ped)
    if isElement(ped) then
        setPedAnimation(ped, chaseblock, chaseanim, -1, true, true, true);
    end
end

function Zomb_chase(ped, Zx, Zy, Zz)
    if isElement(ped) then
        if (getElementData(ped, "status") == "chasing") and (getElementData(ped, "zombie") == true) then
            local x,y,z = getElementPosition(ped);
            if ((getElementData(ped, "target") == nil) and getElementData(ped, "Tx") ~= false) then            
                local Px = getElementData(ped, "Tx");
                local Py = getElementData(ped, "Ty");
                local Pz = getElementData(ped, "Tz");
                local Pdistance = getDistanceBetweenPoints3D(Px, Py, Pz, x, y, z );
                if (Pdistance < 1.5) then
                    setTimer(setElementData, 2000, 1, ped, "status", "idle");
                end
            end
            if (getDistanceBetweenPoints3D(x, y, z, Zx, Zy, Zz ) < 1.5) then
                if not getElementData(ped, "target") then
                    local giveup = math.random(1, 15);
                    if (giveup == 1) then
                        setElementData(ped, "status", "idle");
                    else
                        local action = math.random(1, 2);
                        if (action == 2) then
                            setPedAnimation(ped);
                            triggerClientEvent("Zomb_Jump", root, ped);
                            setTimer(Zomb_chase, 100, 1, ped, x, y, z);
                        else
                            setPedAnimation(ped);
                            triggerClientEvent("Zomb_Punch", root, ped);
                            zmoan(ped);
                            setTimer(chaseAnim, 800, 1, ped);
                            setTimer(Zomb_chase, 100, 1, ped, x, y, z);
                        end
                    end
                else 
                    local Ptarget = getElementData(ped, "target");
                    if isElement(Ptarget) then
                        local Px,Py,Pz = getElementPosition(Ptarget);
                        local Pdistance = getDistanceBetweenPoints3D(Px, Py, Pz, Zx, Zy, Zz);
                        if (Pdistance < 1.5) then
                            if isPedDead(Ptarget) then
                                setPedAnimation(ped);
                                setPedAnimation(ped, "MEDIC", "cpr", -1, false, true, false);
                                setTimer(setElementData, 10000, 1, ped, "status", "idle");
                                setTimer(setElementRotation, 10000, 1, ped, 0, 0, getElementRotation(ped)-180);
                                zmoan(ped);
                            else
                                local action = math.random(1, 6);
                                if (action == 3) then
                                    setPedAnimation(ped);
                                    triggerClientEvent("Zomb_Jump", root, ped);
                                    setTimer(Zomb_chase, 100, 1, ped, x, y, z);
                                else
                                    setPedAnimation(ped);
                                    triggerClientEvent("Zomb_Punch", root, ped);
                                    zmoan(ped);
                                    setTimer(chaseAnim, 800, 1, ped);
                                    setTimer(Zomb_chase, 100, 1, ped, x, y, z);
                                end
                            end
                        else
                            setPedAnimation(ped, chaseblock, chaseanim, -1, true, true, true);
                            setTimer(Zomb_chase, checkspeed, 1, ped, x, y, z);
                        end
                    else
                        setElementData(ped, "status", "idle");
                    end
                end
            else
                setPedAnimation(ped, chaseblock, chaseanim, -1, true, true, true);
                setTimer(Zomb_chase, checkspeed, 1, ped, x, y, z);
            end
        end
    end
end

function setangle()
    for _,ped in ipairs(everyZombie) do
        if isElement(ped) then
            if (getElementData(ped, "status" ) == "chasing") then
                local x,y,z,px,py,pz
                if (getElementData(ped, "target") ~= nil) then
                    local ptarget = getElementData(ped, "target");
                    if isElement(ptarget) then
                        x,y,z = getElementPosition(ptarget);
                        px,py,pz = getElementPosition(ped);
                    else
                        setElementData(ped, "status", "idle");
                        x,y,z = getElementPosition(ped);
                        px,py,pz = getElementPosition(ped);
                    end
                    zombangle = (360-math.deg(math.atan2((x-px), (y-py))))%360;
                    setElementRotation(ped, 0, 0, zombangle);
                elseif (getElementData(ped, "target") == nil) and (getElementData(ped, "Tx") ~= false) then
                    x = getElementData(ped, "Tx");
                    y = getElementData(ped, "Ty");
                    z = getElementData(ped, "Tz");
                    px,py,pz = getElementPosition(ped);
                    zombangle = (360-math.deg(math.atan2((x-px), (y-py))))%360;
                    setElementRotation(ped, 0, 0, zombangle);
                end
            end
        end
    end
end

addEventHandler("onElementDataChange", root, function(dataName)
    if (getElementType(source) == "ped" and dataName == "status") then
        if (getElementData(source, "zombie") == true) then
            if (isPedDead(source) == false) then
                if (getElementData(source, "status") ==  "chasing") then
                    local Zx,Zy,Zz = getElementPosition(source);
                    setTimer(Zomb_chase, 1000, 1, source, Zx, Zy, Zz);
                    local newtarget = getElementData(source, "target");
                    if isElement (newtarget) then
                        if (getElementType(newtarget) == "player") then
                            setElementSyncer(source, newtarget);
                        end
                    end
                    zmoan(source);
                elseif (getElementData(source, "status") ==  "idle") then
                    setTimer(Zomb_Idle, 1000, 1, source);
                elseif (getElementData(source, "status") ==  "throatslashing") then
                    local tx,ty,tz = getElementPosition(source);
                    local ptarget = getElementData(source, "target");
                    if isElement(ptarget) then
                        local vx,vy,vz = getElementPosition(ptarget);
                        if (getDistanceBetweenPoints3D(tx, ty, tz, vx, vy, vz) < .8) then
                            zmoan(source);
                            setPedAnimation(source, "knife", "KILL_Knife_Player", -1, false, false, true);
                            setPedAnimation(ptarget, "knife", "KILL_Knife_Ped_Damage", -1, false, false, true);
                            setTimer(Playerthroatbitten, 2300, 1, ptarget, source);
                            setTimer(function(source) if (isElement(source)) then setElementData(source, "status", "idle"); end end, 5000, 1, source);
                        else
                            setElementData(source, "status", "idle");
                        end
                    else
                        setElementData(source, "status", "idle");
                    end
                end
            elseif (getElementData(source, "status") ==  "dead") then
                setTimer(Zomb_delete, 10000, 1, source);
            end
        end
    end
end)


addEventHandler("onResourceStart", root, function(startedResource)
    newZombieLimit = 50;
    if (newZombieLimit ~= false) then
        if (newZombieLimit > ZombieLimit) then 
            newZombieLimit = ZombieLimit;
        end
    else
        newZombieLimit = ZombieLimit;
    end
    WoodTimer = setTimer(WoodSetup, 2000, 1);
    if (startedResource == getThisResource()) then
        for _,thep in ipairs(getElementsByType("player")) do
            setElementData(thep, "dangercount", 0);
        end    
        for _,playerValue in ipairs(getAlivePlayers()) do
            setElementData(playerValue, "alreadyspawned", true);
        end
        if (ZombieSpeed == 2) then
            MainTimer1 = setTimer(setangle, 200, 0);
        else
            MainTimer1 = setTimer(setangle, 400, 0);
        end
        MainTimer3 = setTimer(clearFarZombies, 3000, 0);
        if (ZombieStreaming == 1) then
            MainTimer2 = setTimer(SpawnZombie, 2500, 0);
        elseif (ZombieStreaming == 2) then
            MainTimer2 = setTimer(SpawnpointZombie, 2500, 0);
        end
    end
end);

addEventHandler("onPlayerJoin", root, function()
    setElementData(source, "dangercount", 0)

function WoodSetup()
    for _,colValue in ipairs(getElementsByType("colshape")) do
        if (getElementData(colValue, "purpose" ) == "zombiewood") then
            destroyElement(colValue);
        end
    end    
    for _,objectValue in ipairs(getElementsByType("object")) do
        if (getElementData(objectValue, "purpose") == "zombiewood") then
            setElementDimension(objectValue, 26);
            local x,y,z = getElementPosition(objectValue);
            local thecol = createColSphere(x, y, z, 1.6 );
            setElementData(thecol, "purpose", "zombiewood" );
            setElementParent(thecol, objectValue);
        end
    end    
end

function ReduceMoancount()
    moancount = moancount - 1;
end

function zmoan(zombie)
    if (moancount < moanlimit) then
        moancount = moancount + 1;
        local randnum = math.random(1, 10);
        triggerClientEvent("Zomb_Moan", root, zombie, randnum);
        setTimer(ReduceMoancount, 800, 1);
    end
end

function Zomb_delete(ped)
    if isElement(ped) then
        if (getElementData(ped, "zombie") == true) then
            for theKey,thePed in ipairs(everyZombie) do
                if (ped == thePed) then
                    table.remove(everyZombie, theKey);
                    break;
                end
            end
            destroyElement(ped);
        end
    end
end

function Playerthroatbitten(player, attacker)
    local Zx, Zy, Zz = getElementPosition(attacker);
    local Px, Py, Pz = getElementPosition(player);
    local distance = getDistanceBetweenPoints3D(Px, Py, Pz, Zx, Zy, Zz);
    if (distance < 1) then
        killPed(player, attacker, weapon, bodypart);
    else
        setPedAnimation(player);
    end
end

function SpawnZombie()
    local pacecount = 1;
    while (pacecount < 5) do
        if (table.getn(everyZombie) + pacecount < newZombieLimit) and (ZombieStreaming == 1) then    
            local xcoord = 0;
            local ycoord = 0;
            local xdirection = math.random(1, 2);
            if (xdirection == 1) then
                xcoord = math.random(15, 40);
            else
                xcoord = math.random(-40, -15);
            end
            local ydirection = math.random(1, 2);
            if (ydirection == 1) then
                ycoord = math.random(15, 40);
            else
                ycoord = math.random(-40, -15);
            end
            local liveplayers = getAlivePlayers();
            if (table.getn(liveplayers) > 0) then
                local lowestcount = 99999;
                local lowestguy = nil;
                for _,thePlayer in ipairs(liveplayers) do
                    if isElement(thePlayer) then
                        if (getElementData(thePlayer, "dangercount")) and (getElementData(thePlayer, "zombieProof") ~= true) and (getElementData(thePlayer, "alreadyspawned" ) == true) then
                            if (getElementData (thePlayer, "dangercount") < lowestcount) then
                                local safezone = 0;
                                local gx,gy,gz = getElementPosition(thePlayer);
                                for _,theradar in ipairs(getElementsByType("radararea")) do
                                    if (getElementData(theradar, "zombieProof") == true) then
                                        if isInsideRadarArea(theradar, gx, gy) then
                                            safezone = 1;
                                        end
                                    end
                                end
                                if (safezone == 0) then
                                    lowestguy = thePlayer;
                                    lowestcount = getElementData(thePlayer, "dangercount");
                                end
                            end
                        end
                    end
                end
                pacecount = pacecount + 1;
                if isElement(lowestguy) then
                    triggerClientEvent("Spawn_Placement", lowestguy, ycoord, xcoord);
                else
                    pacecount = pacecount + 1;
                end
            else
                pacecount = pacecount + 1;
            end
        else
            pacecount = pacecount + 1;
        end
    end
end

function clearFarZombies()
    if (newZombieLimit ~= false) then
        local toofarzombies = {};
        for ZombKey,theZomb in ipairs(everyZombie) do
            if isElement(theZomb) then
                if getElementData(theZomb, "zombie") then
                    far = 1;
                    local Zx,Zy,Zz = getElementPosition(theZomb);
                    for _,thePlayer in ipairs(getElementsByType("player")) do
                        local Px,Py,Pz = getElementPosition(thePlayer);
                        if (getDistanceBetweenPoints3D(Px, Py, Pz, Zx, Zy, Zz) < 75) then
                            far = 0;
                        end
                    end
                    if (far == 1) then
                        table.insert(toofarzombies, theZomb);
                    end
                end
            else
                table.remove(everyZombie, ZombKey);
            end
        end
        if (table.getn(toofarzombies) > 1) then
            for _,theZomb in ipairs(toofarzombies) do
                if getElementData(theZomb, "zombie") and not getElementData(theZomb, "forcedtoexist") then
                    Zomb_delete(theZomb);
                end
            end
        end
    end
end

addEventHandler("onPlayerSpawn", root, function()
    if (ZombieStreaming == 1 or ZombieStreaming == 2) then
        local relocatecount = 0;
        for _,theZomb in ipairs(everyZombie) do
            if (relocatecount < 14) then
                if not getElementData(theZomb, "forcedtoexist") then
                    if (getElementData(theZomb, "status") == "idle") and not isPedDead(theZomb) and getElementData(theZomb, "zombie") then
                        relocatecount = relocatecount + 1;
                        Zomb_delete(theZomb);
                    end
                end
            end
        end
    end
    if not getElementData(source, "alreadyspawned") then
        setElementData(source, "alreadyspawned", true);
    end
end);

function createZombie(x, y, z, rot, skin)
    if (table.getn(everyZombie) < newZombieLimit) then
        local zomb = createPed(tonumber(skin), tonumber(x), tonumber(y), tonumber(z));
        if isElement(zomb) then
            setElementData(zomb, "zombie", true);
            setElementData(zomb, "forcedtoexist", true);
            setElementRotation(zomb, 0, 0, rot);
            setElementData(zomb, "status", "idle");
            table.insert(everyZombie, zomb);
            triggerClientEvent("Zomb_STFU", root, zomb);
            return zomb;
        end
    end
    return false;
end

function isPedZombie(ped)
    if isElement(ped) then
        if getElementData(ped, "zombie") then
            return true;
        end
    end
    return false;
end

addEventHandler("onZombieLostPlayer", root, function(x, y, z)
    setElementData(source, "Tx", x, false);
    setElementData(source, "Ty", y, false);
    setElementData(source, "Tz", z, false);
end);

addEventHandler("createZomieForPlayer", root, function(x, y, z)
    local zombie = createZombie(x, y, z, math.random(360), zombiePedSkins[math.random(#zombiePedSkins)]);
    setElementData(zombie, "zombie", true);
    setElementData(zombie, "blood", math.random(8000, 12000));
    setElementData(zombie, "owner", client);
    setElementData(client, "spawnedzombies", getElementData(client, "spawnedzombies") + 1);
end);

addEventHandler("onPlayerQuit", root, function()
    for _,v in ipairs(getElementsByType("ped")) do
        if getElementData(v, "zombie") then
            if (getElementData(v, "owner") == source) then
                destroyElement(v);
            end
        end
    end
end);

addEventHandler("onZombieGetsKilled", root, function(killer, headshot)
    if (killer and getElementType(killer) == "player") then
        if headshot then
            setElementData(killer, "headshots", getElementData(killer, "headshots") + 1);
        end
        setElementData(killer, "zombieskilled", getElementData(killer, "zombieskilled") + 1);
    end
    local x,y,z = getElementPosition(source);
    local ped = createPed(getElementModel(source), x, y, z);
    local pedCol = createColSphere(x, y, z, 1.5);
    killPed(ped);
    setTimer(function(ped, pedCol)
        if ped then destroyElement(ped); end
        if pedCol then destroyElement(pedCol); end
    end, (10*60000), 1, ped, pedCol);
    attachElements(pedCol, ped);
    setElementData(pedCol, "parent", ped);
    setElementData(pedCol, "playername", "Zombie");
    setElementData(pedCol, "deadman", true);
    setElementData(pedCol, "MAX_Slots", 8);
    setElementData(ped, "deadzombie", true);
    local time = getRealTime();
    setElementData(pedCol, "deadreason", "Looks like it's finally dead. Estimated time of death: "..time.hour..":"..time.minute.." o'clock.");
    for _,v in ipairs(itemTableZombies) do
        local value = math.percentChance(v[2]/2.5, 1);
        setElementData(pedCol, v[1], value);
        local ammoData,_ = getWeaponZombieAmmoType(v[1]);
        if (ammoData and value > 0) then
            setElementData(pedCol, ammoData, 1);
        end
    end
    local zOwner = getElementData(source, "owner");
    setElementData(zOwner, "spawnedzombies", getElementData(zOwner, "spawnedzombies") 1);
    destroyElement(source);
end);