local Luan = require "luan:Luan.luan"
local error = Luan.error
local ipairs = Luan.ipairs or error()
local to_string = Luan.to_string or error()
local get_local_only = Luan.get_local_only or error()
local set_local_only = Luan.set_local_only or error()
local Lucene = require "luan:lucene/Lucene.luan"
local lucene_quote = Lucene.quote or error()
local Http = require "luan:http/Http.luan"
local Db = require "site:/lib/Db.luan"
local Logging = require "luan:logging/Logging.luan"
local logger = Logging.logger "User"


local User = {}

local function from_doc(doc)
	doc.type == "user" or error "wrong type"
	return User.new {
		id = doc.id
		email = doc.user_email
		password = doc.password
	}
end

local function to_doc(user)
	return {
		type = "user"
		id = user.id
		user_email = user.email
		password = user.password
	}
end

function User.new(user)

	function user.save()
		local doc = to_doc(user)
		Db.save(doc)
		user.id = doc.id
	end

	function user.reload()
		return User.get_by_id(user.id) or error(user.id)
	end

	function user.login()
		local id = to_string(user.id)
		Http.response.set_persistent_cookie("user",id)
		Http.response.set_persistent_cookie("password",user.password)
		Http.request.cookies.user = id
		Http.request.cookies.password = user.password or error()
	end

	return user
end

local function get_by_id(id)
	local doc = Db.get_document("id:"..id)
	return doc and doc.type=="user" and from_doc(doc) or nil
end
User.get_by_id = get_by_id

function User.get_by_email(email)
	local doc = Db.get_document("user_email:"..lucene_quote(email))
	return doc and from_doc(doc)
end

function User.search(query,sort,rows)
	rows = rows or 1000000
	local users = {}
	local docs = Db.search(query,1,rows,{sort=sort})
	for _, doc in ipairs(docs) do
		users[#users+1] = from_doc(doc)
	end
	return users
end

function User.current()
	local user = get_local_only(User,"current")
	if user == nil then
		local id = Http.request.cookies.user
		local password = Http.request.cookies.password
		if id == nil or password == nil then
			user = "nil"
		else
			user = get_by_id(id)
			if user == nil or user.registered == nil or user.password ~= password then
				user = "nil"
			end
		end
		set_local_only(User,"current",user)
	end
	return user ~= "nil" and user or nil
end

function User.current_required()
	local user = User.current()
	user or Http.response.send_redirect "/login.html"
	return user
end

return User