local M = {}

M.iter_table_dump = function ( arr )
  for k, v in pairs(arr) do
    print("Table:", k, v)
  end
end

local escape_chars = function ( text )
  return string.gsub(text, "[%(|%)|\\|%[|%]|%-|%{%}|%?|%+|%*|%^|%$|%.]", {
    ["\\"] = "\\\\",
    ["-"] = "\\-",
    ["("] = "\\(",
    [")"] = "\\)",
    ["["] = "\\[",
    ["]"] = "\\]",
    ["{"] = "\\{",
    ["}"] = "\\}",
    ["?"] = "\\?",
    ["+"] = "\\+",
    ["*"] = "\\*",
    ["^"] = "\\^",
    ["$"] = "\\$",
    ["."] = "\\.",
  })
end

-- :@dev: clean the text once it has been fetched from buffer
M.clean_buf = function ( text )
  if not type(text) == "string" or text == nil then
    return ""
  end

  return text:match( "^%s*(.-)%s*$" )
end


M.get_selection = function()
  local _, csrow, cscol, _ = unpack(vim.fn.getpos("'<"))
  local _, cerow, cecol, _ = unpack(vim.fn.getpos("'>"))
  if csrow < cerow or (csrow == cerow and cscol <= cecol) then
    return csrow - 1, cscol - 1, cerow - 1, cecol
  else
    return cerow - 1, cecol - 1, csrow - 1, cscol
  end
end


M.subslice = function(line, col)
    local i = 0
    local j = 0
    while true do
      j = string.find(line, " ", j+1)    -- find 'next' newline
      if  j == nil then break end
      if j > col then break end
      i = j
    end

    return { i, j }
end


return M