--[[
This file is part of LuaMinify by stravant (https://github.com/stravant/LuaMinify).

LICENSE :
The MIT License (MIT)

Copyright (c) 2012-2013

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.
]]

--
-- Util.lua
--
-- Provides some common utilities shared throughout the project.
--

local function lookupify(tb)
	for _, v in pairs(tb) do
		tb[v] = true
	end
	return tb
end


local function CountTable(tb)
	local c = 0
	for _ in pairs(tb) do c = c + 1 end
	return c
end


local function PrintTable(tb, atIndent)
	if tb.Print then
		return tb.Print()
	end
	atIndent = atIndent or 0
	local useNewlines = (CountTable(tb) > 1)
	local baseIndent = string.rep('    ', atIndent+1)
	local out = "{"..(useNewlines and '\n' or '')
	for k, v in pairs(tb) do
		if type(v) ~= 'function' then
		--do
			out = out..(useNewlines and baseIndent or '')
			if type(k) == 'number' then
				--nothing to do
			elseif type(k) == 'string' and k:match("^[A-Za-z_][A-Za-z0-9_]*$") then 
				out = out..k.." = "
			elseif type(k) == 'string' then
				out = out.."[\""..k.."\"] = "
			else
				out = out.."["..tostring(k).."] = "
			end
			if type(v) == 'string' then
				out = out.."\""..v.."\""
			elseif type(v) == 'number' then
				out = out..v
			elseif type(v) == 'table' then
				out = out..PrintTable(v, atIndent+(useNewlines and 1 or 0))
			else
				out = out..tostring(v)
			end
			if next(tb, k) then
				out = out..","
			end
			if useNewlines then
				out = out..'\n'
			end
		end
	end
	out = out..(useNewlines and string.rep('    ', atIndent) or '').."}"
	return out
end


local function splitLines(str)
	if str:match("\n") then
		local lines = {}
		for line in str:gmatch("[^\n]*") do 
			table.insert(lines, line)
		end
		assert(#lines > 0)
		return lines
	else
		return { str }
	end
end


local function printf(fmt, ...)
	return print(string.format(fmt, ...))
end


return {
	PrintTable = PrintTable,
	CountTable = CountTable,
	lookupify  = lookupify,
	splitLines = splitLines,
	printf     = printf,
}