---------------------------------------------------------
--- Utils library for ZD
---------------------------------------------------------

local string = require('string')
require('./string.lua')(string)
local os = require('os')

return function(ZD)

  -- Simple console output with a [ZD] tag and better tabbing. Used internal.
  ZD.cout = function(...)
    local output = "[ZD " .. tostring(os.date()) .. "]  "
    for k,v in pairs({...}) do
      output = output .. tostring(v) .. " "
    end
    return print(output)
  end

  -- Input: tbl, lvl = 0, callback
  -- Example: debugTable(_G)
  -- Prints out the table + all sub-tables in an easily readable form.
  -- You can pass a callback function that logs the table instead.
  ZD.debugTable = function(tbl, lvl, func)
    if type(tbl) ~= "table" then
      tbl = {}
    end
    func = func or print
    lvl = lvl or 0
    for k,v in pairs(tbl) do
      local space = ""
      for i = 1, lvl do
        space = space .. "  "
      end
      func(space .. tostring(k) .. ":   " .. tostring(v))
      if type(v) == "table" then
        ZD.debugTable(v, lvl + 1, func)
      end
    end
  end

  ZD.hashTable = function(tbl)
    local string = ""
    iterate = function(tbl)
      if type(tbl) ~= "table" then
        tbl = {}
      end
      func = func or print
      lvl = lvl or 0
      for k,v in pairs(tbl) do
        string = string .. tostring(k) .. ":" .. tostring(v) .. "/"
        if type(v) == "table" then
          iterate(v)
        end
      end
    end
    iterate(tbl)
    return ZD.md5.sumhexa(string)
  end

  -- Input: url = "/index.lua?k=5&v=test"
  -- Output: {path = "/index.lua", get={k=5, v="test"}, ending = "lua"}
  ZD.parseURL = function(url)
    local _url = string.split(url, "?")
    local path = _url[1] or url
    local ending = string.split(path, ".")
    ending = ending[#ending]
    local _get = string.split(_url[2] or "", "&")
    local get = {}
    for k,v in pairs(_get) do
      local arg = string.split(v, "=")
      if arg[1] and arg[2] then
        get[arg[1]] = arg[2]
      end
    end
    return {path = path, get = get, ending = ending}
  end

end