--smsingh Google Code-in, Introduction to Lua in Wikipedia
--smsingh Google Code-in, Working With Modules

local p = {} -- p stands for package

function p.hello( frame )
    return "Hello, world!"
end

p.Hi = function(frame)
	strName = frame.args.name or "Jimbo"
	return "Hello from Lua to my friend " .. strName .. ".<br>"
end

-- smsingh Task 3, Calculations and Tests
p.temperature = function(frame)
	cel = frame.args.celsius
	cel = tonumber(cel) or 0
	fah = (cel*9/5) + 32
	msg = cel .. " degrees in Celsius is " .. fah .. " degrees in Fahrenheit."
	if cel > 9 then msg = msg .. " It is warm." else msg = msg .. " It is cold." end
	return msg
end

-- smsingh Task 4, Loops and Tables
p.times = function(frame)
	local num = tonumber( frame.args.num ) or 2
	local out = num .. " times table<br>"
	for i = 1, 12 do
		out = out .. num .. " times " .. i .. " equals " .. i * num .. "<br>"
	end
	return out
end

p.mum = function(frame)
	local family = {"Dad", "Mum", "Uncle Stan", "Aunty Elsie", "Brian", "Grandpa George", "Grandma Barbara", "Elizabeth"}
	local msg = ""
	for n = 1, #family do
		msg = msg .. "Hello " .. family[n] .. "<br>"
	end
	return msg
end

-- smsingh Task 5, Lua Libraries
p.sentence = function(frame)
	local str = frame.args.words or ""
	local firstletter = string.sub(str, 1, 1)
	firstletter = string.upper(firstletter)
	restofword = string.sub(str, 2)
	local out = firstletter .. restofword
	return out
end

p.unpackdate = function(frame)
	local dmydate = frame.args.dmydate or ""
	local day, month, year = string.match(dmydate, "(%d+) (%w+) (%d+)")
	return "Year = " .. year .. "<br>Day = " .. day .. "<br>Month = " .. month
end

-- smsingh Task 6, MediaWiki Libraries
p.langnames = function(frame)
	local langlist = mw.language.fetchLanguageNames()
	local langs = ""
	local count = 0
	for k, v in pairs(langlist) do
		langs = langs .. k .. " - " .. v .. "<br>"
		count = count + 1
	end
	return langs .. "<br>= " .. count .. " languages"
end

p.fallbacks = function(frame)
	local langcode = frame.args.langcode
	local fallbacks = mw.language.getFallbacksFor(langcode)
	local out = ""
	for i = 1, #fallbacks do
		out = out .. fallbacks[i] .. "<br>"
	end
	return out
end

p.pagename = function( frame )
	local ttl = frame.args.title
	local ttlobj = mw.title.new( ttl )
	local txt = ttlobj.text
	return txt
end

p.pageinfo = function(frame)
	local ttl = frame.args.title
	if ttl == nil or #ttl < 1 then
		return "Please input a title."
	end
	local titleobject = mw.title.new(ttl)
	if titleobject == nil then
		return "Please input a title."
	end
	local message = ""
	message = message .. ttl
	if titleobject.exists then
		message = message .. " exists "
	else
		message = message .. " does not exist "
	end
	if titleobject.isRedirect then
		message = message .. "and is a redirect."
	else
		message = message .. "and is not a redirect."
	end
	return message
end
return p