local Charset = {}

for i = 48,  57 do table.insert(Charset, string.char(i)) end
for i = 65,  90 do table.insert(Charset, string.char(i)) end
for i = 97, 122 do table.insert(Charset, string.char(i)) end

ESX.Trace = function(str)
  if Config.EnableDebug then
    print('ESX> ' .. str)
  end
end

ESX.GetConfig = function()
  return Config
end

ESX.GetRandomString = function(length)

  math.randomseed(os.time())

  if length > 0 then
    return ESX.GetRandomString(length - 1) .. Charset[math.random(1, #Charset)]
  else
    return ''
  end

end

ESX.SetTimeout = function(msec, cb)

  local id = ESX.TimeoutCount + 1

  SetTimeout(msec, function()

    if ESX.CancelledTimeouts[id] then
      ESX.CancelledTimeouts[id] = nil
    else
      cb()
    end

  end)

  ESX.TimeoutCount = id

  return id

end

ESX.ClearTimeout = function(id)
  ESX.CancelledTimeouts[id] = true
end

ESX.RegisterServerCallback = function(name, cb)
  ESX.ServerCallbacks[name] = cb
end

ESX.TriggerServerCallback = function(name, requestId, source, cb, ...)

  if ESX.ServerCallbacks[name] ~= nil then
    ESX.ServerCallbacks[name](source, cb, ...)
  else
    print('TriggerServerCallback => [' .. name .. '] does not exists')
  end

end

ESX.SavePlayer = function(xPlayer, cb)

  local asyncTasks     = {}
  xPlayer.lastPosition = xPlayer.get('coords')

  -- User accounts
  for i=1, #xPlayer.accounts, 1 do

    if ESX.LastPlayerData[xPlayer.source].accounts[xPlayer.accounts[i].name] ~= xPlayer.accounts[i].money then

      table.insert(asyncTasks, function(cb)

        MySQL.Async.execute(
          'UPDATE user_accounts SET `money` = @money WHERE identifier = @identifier AND name = @name',
          {
            ['@money']      = xPlayer.accounts[i].money,
            ['@identifier'] = xPlayer.identifier,
            ['@name']       = xPlayer.accounts[i].name
          },
          function(rowsChanged)
            cb()
          end
        )

      end)

      ESX.LastPlayerData[xPlayer.source].accounts[xPlayer.accounts[i].name] = xPlayer.accounts[i].money

    end

  end

  -- Inventory items
  for i=1, #xPlayer.inventory, 1 do

    if ESX.LastPlayerData[xPlayer.source].items[xPlayer.inventory[i].name] ~= xPlayer.inventory[i].count then

      table.insert(asyncTasks, function(cb)

        MySQL.Async.execute(
          'UPDATE user_inventory SET `count` = @count WHERE identifier = @identifier AND item = @item',
          {
            ['@count']      = xPlayer.inventory[i].count,
            ['@identifier'] = xPlayer.identifier,
            ['@item']       = xPlayer.inventory[i].name
          },
          function(rowsChanged)
            cb()
          end
        )

      end)

      ESX.LastPlayerData[xPlayer.source].items[xPlayer.inventory[i].name] = xPlayer.inventory[i].count

    end

  end

  -- Job, loadout and position
  table.insert(asyncTasks, function(cb)

    MySQL.Async.execute(
      'UPDATE users SET `job` = @job, `job_grade` = @job_grade, `loadout` = @loadout, `position` = @position WHERE identifier = @identifier',
      {
        ['@job']        = xPlayer.job.name,
        ['@job_grade']  = xPlayer.job.grade,
        ['@loadout']    = json.encode(xPlayer.loadout),
        ['@position']   = json.encode(xPlayer.lastPosition),
        ['@identifier'] = xPlayer.identifier
      },
      function(rowsChanged)
        cb()
      end
    )

  end)

  Async.parallel(asyncTasks, function(results)

    RconPrint('[SAVED] ' .. xPlayer.name .. "\n")

    if cb ~= nil then
      cb()
    end

  end)

end

ESX.SavePlayers = function(cb)

  local asyncTasks = {}
  local xPlayers   = ESX.GetPlayers()

  for i=1, #xPlayers, 1 do
    table.insert(asyncTasks, function(cb)
      local xPlayer = ESX.GetPlayerFromId(xPlayers[i])
      ESX.SavePlayer(xPlayer, cb)
    end)
  end

  Async.parallelLimit(asyncTasks, 8, function(results)

    RconPrint('[SAVED] All players' .. "\n")

    if cb ~= nil then
      cb()
    end

  end)

end

ESX.StartDBSync = function()

  function saveData()
    ESX.SavePlayers()
    SetTimeout(10 * 60 * 1000, saveData)
  end

  SetTimeout(10 * 60 * 1000, saveData)

end

ESX.GetPlayers = function()

  local sources = {}

  for k,v in pairs(ESX.Players) do
    table.insert(sources, k)
  end

  return sources
end


ESX.GetPlayerFromId = function(source)
  return ESX.Players[tonumber(source)]
end

ESX.GetPlayerFromIdentifier = function(identifier)

  for k,v in pairs(ESX.Players) do
    if v.identifier == identifier then
      return v
    end
  end

end

ESX.RegisterUsableItem = function(item, cb)
  ESX.UsableItemsCallbacks[item] = cb
end

ESX.UseItem = function(source, item)
  ESX.UsableItemsCallbacks[item](source)
end

ESX.GetWeaponList = function()
  return Config.Weapons
end

ESX.GetWeaponLabel = function(name)

  name          = string.upper(name)
  local weapons = ESX.GetWeaponList()

  for i=1, #weapons, 1 do
    if weapons[i].name == name then
      return weapons[i].label
    end
  end

end

ESX.CreatePickup = function(type, name, count, label, player)

  local pickupId = (ESX.PickupId == 65635 and 0 or ESX.PickupId + 1)

  ESX.Pickups[pickupId] = {
    type  = type,
    name  = name,
    count = count
  }

  TriggerClientEvent('esx:pickup', -1, pickupId, label, player)

  ESX.PickupId = pickupId

end