local config = require("config")
local session = require("session")
local pages = require("pages")
local cache = require("cache")

local function paste_get(req)
	--Get the paste page
	local host = http_request_get_host(req)
	local text
	local author,_ = session.get(req)
	if host == config.domain and author then
		http_response_header(req,"Location",string.format("https://%s.%s/_paste",author,config.domain))
		http_response(req,303,"")
		return
	elseif host == config.domain and author == nil then
		text = cache.render(string.format("%s/_paste",host),function()
			print("Cache missing, rendering post page")
			return pages.paste{
				domain = config.domain,
				err = "",
			}
		end)
		http_response(req,200,text)
	elseif host ~= config.domain and author then
		text = pages.author_paste{
			domain = config.domain,
			user = author,
			err = "",
			text="",
		}
	elseif host ~= config.domain and author == nil then
		http_response_header(req,"Location",string.format("https://%s/_paste",config.domain))
		http_response(req,303,"")
	else
		error(string.format(
			"Unable to find a good case for paste:%s,%s,%s",
			host,
			config.domain,
			author
		))
	end
	assert(text)
	http_response(req,200,text)
	--[=[
	if host == config.domain then
		local author,_ = get_session(req)
		if author then
			http_response_header(req,"Location",string.format("https://%s.%s/_paste",author,domain))
			http_response(req,303,"")
			return
		else
			--For an anonymous user
			ret = cache.render(string.format("%s/_paste",host),function()
				print("Cache missing, rendering post page")
				return pages.paste{
					domain = domain,
					err = "",
				}
			end)
		end

	else
		--Or for someone that's logged in
		print("Looks like a logged in user wants to paste!")
		local subdomain = host:match("([^%.]+)")
		local author,_ = session.get(req)
		print("subdomain:",subdomain,"author:",author)
		--If they try to paste as an author, but are on the
		--wrong subdomain, or or not logged in, redirect them
		--to the right place. Their own subdomain for authors
		--or the anonymous paste page for not logged in users.
		if author == nil then
			http_response_header(req,"Location","https://"..domain.."/_paste")
			http_response(req,303,"")
			return
		end
		if author ~= subdomain then
			http_response_header(req,"Location",string.format("https://%s.%s/_paste",author,domain))
			http_response(req,303,"")
			return
		end
		assert(author == subdomain,"someone wants to paste as someone else")
		--We're where we want to be, serve up this users's
		--paste page. No cache, because how often is a user
		--going to paste?
		ret = pages.author_paste{
			domain = domain,
			user = author,
			text = "",
			err = "",
		}
	end
	]=]
end

return paste_get