-- loveutils.datas : simple functions for data manipulation.

--[[
  Copyright © 2021 Kazhnuz

  Permission is hereby granted, free of charge, to any person obtaining a copy of
  this software and associated documentation files (the "Software"), to deal in
  the Software without restriction, including without limitation the rights to
  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  the Software, and to permit persons to whom the Software is furnished to do so,
  subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
]]

local DataUtils = {}

local DATADIR = "datas"
local GAMEDATADIR = "gamedata"

function DataUtils.isLuaFile(name)
  local extension = name:sub(#name - 4, #name)
  return (extension == ".lua")
end

function DataUtils.luaFileToModule(luaFile)
  if (not DataUtils.isLuaFile(luaFile)) then
    return luaFile:sub(1, #luaFile - 4)
  else
    return luaFile
  end
end

function DataUtils.luaFileListToModuleList(luaFileList)
  local moduleList = {}
  for i,luaFile in ipairs(luaFileList) do
    table.insert(moduleList, DataUtils.luaFileToModule(luaFile))
  end
  return moduleList
end

function DataUtils.require(parent, filename)
  return require(DataUtils.concatFolder(parent, filename, true))
end

function DataUtils.copy(filepath)
  local orig = require(filepath)
  local orig_type = type(orig)
  local copy
  if orig_type == 'table' then
      copy = {}
      for orig_key, orig_value in pairs(orig) do
          copy[orig_key] = orig_value
      end
  else -- number, string, boolean, etc
      copy = orig
  end
  return copy
end


function DataUtils.copyDataset(parent, filename)
  local orig = DataUtils.require(parent, filename)
  local orig_type = type(orig)
  local copy
  if orig_type == 'table' then
      copy = {}
      for orig_key, orig_value in pairs(orig) do
          copy[orig_key] = orig_value
      end
  else -- number, string, boolean, etc
      copy = orig
  end
  return copy
end

function DataUtils.concatDataFolder(folder, lua)
  return DataUtils.concatFolder(DataUtils.getGameDataDir(lua), folder, lua)
end

function DataUtils.getGameDataDir(lua)
  return DataUtils.concatFolder(DATADIR, GAMEDATADIR, lua)
end

function DataUtils.concatFolder(parent, filename, lua)
  return parent .. DataUtils.sep(lua) .. filename
end

function DataUtils.sep(lua)
  if (lua) then
    return "."
  else
    return "/"
  end
end

return DataUtils