local meta = FindMetaTable("Player")
if not meta then return end

--[[---------------------------------------------------------
    Name: IsAdmin
    Desc: Returns if a player is an admin.
-----------------------------------------------------------]]
function meta:IsAdmin() 
    if self:IsSuperAdmin() then return true end
    if self:IsUserGroup("admin") then return true end

    return false
end

--[[---------------------------------------------------------
    Name: IsSuperAdmin
    Desc: Returns if a player is a superadmin.
-----------------------------------------------------------]]
function meta:IsSuperAdmin()
    return self:IsUserGroup("superadmin")
end

--[[---------------------------------------------------------
    Name: IsUserGroup
    Desc: Returns if a player is in the specified usergroup.
-----------------------------------------------------------]]
function meta:IsUserGroup(name)
    if not self:IsValid() then return false end

    return self:GetNWString("UserGroup") == name
end

--[[---------------------------------------------------------
    Name: GetUserGroup
    Desc: Returns the player's usergroup.
-----------------------------------------------------------]]
function meta:GetUserGroup()
    return self:GetNWString("UserGroup", "user")
end


--[[---------------------------------------------------------
    This is the meat and spunk of the player auth system
-----------------------------------------------------------]]

if not SERVER then return end

--[[---------------------------------------------------------
    Name: SetUserGroup
    Desc: Sets the player's usergroup. ( Serverside Only )
-----------------------------------------------------------]]
function meta:SetUserGroup(name)
    self:SetNWString("UserGroup", name)
end


-- SteamIds table..
-- STEAM_0:1:7099:
--     name   =   garry
--     group  =   superadmin

local SteamIDs = {}

-- Load the users file
local UsersKV = util.KeyValuesToTable( file.Read( "settings/users.txt", "GAME" ) )

-- Extract the data into the SteamIDs table
for key, tab in pairs( UsersKV ) do
    for name, steamid in pairs( tab ) do
        SteamIDs[ steamid ] = {}
        SteamIDs[ steamid ].name = name
        SteamIDs[ steamid ].group = key
    end
end

function util.GetUserGroups()
    return SteamIDs
end

hook.Add("PlayerInitialSpawn", "PlayerAuthSpawn", function(ply)
    local steamid = ply:SteamID()
    
    if game.SinglePlayer() or ply:IsListenServerHost() then
        ply:SetUserGroup("superadmin")
        return
    end
    
    if SteamIDs[steamid] == nil then
        ply:SetUserGroup("user")
        return
    end

    -- Admin SteamID need to be fully authenticated by Steam!
    if ply.IsFullyAuthenticated and not ply:IsFullyAuthenticated() then
        ply:ChatPrint(string.format("Hey '%s' - Your SteamID wasn't fully authenticated, so your usergroup has not been set to '%s.'",
            SteamIDs[steamid].name, SteamIDs[steamid].group))
        ply:ChatPrint("Try restarting Steam.")
        return
    end

    ply:SetUserGroup(SteamIDs[steamid].group)
    ply:ChatPrint(string.format("Hey '%s' - You're in the '%s' group on this server.",
        SteamIDs[steamid].name, SteamIDs[steamid].group))
end)