--[[******************************************************************************]]
--[[*  Project ib_win_core                                                       *]]
--[[*  Copyright 2023 Incredibuild Software Ltd.                                 *]]
--[[*  All rights reserved                                                       *]]
--[[******************************************************************************]]

local function get_valid_items_usage_time(keys, vals)
  local result = {}
  for i = 1, #keys
  do
    result[i] = redis.call('HGET', keys[i], vals[i]) or 0
    if result[i] ~= 0
    then
      redis.call('HSET', keys[i], vals[i], 1)
    end
  end
  return result
end

local function build_response(result)
  return #result..'\n'..table.concat(result, '\n')
end

local function main(initDB, keys, vals)
  assert(#vals == #keys)
  redis.call('SELECT', initDB)
  return build_response(get_valid_items_usage_time(keys, vals))
end

return main(ARGV[1], KEYS, { unpack(ARGV, 2) })