module 'aux.core.history'


--not using acecomm anymore
--[[AuxAddon = AceLibrary("AceAddon-2.0"):new("AceComm-2.0")   --im unsure this is done correctly but seems to work lol

local commPrefix = "AuxAddon";
AuxAddon:SetCommPrefix(commPrefix)

function AuxAddon:OnEnable()
	--self:RegisterComm(commPrefix, "GROUP", "OnCommReceive"); --for testing purposes, not really useful in real world I think
	self:RegisterComm(commPrefix, "GUILD", "OnCommReceive");
	--self:RegisterComm(commPrefix, "ZONE", "OnCommReceive");
end ]]--

local T = require 'T'
local aux = require 'aux'

local persistence = require 'aux.util.persistence'

local history_schema = {'tuple', '#', {next_push='number'}, {daily_min_buyout='number'}, {data_points={'list', ';', {'tuple', '@', {value='number'}, {time='number'}}}}}

local value_cache = {}

function aux.handle.LOAD2()
	data = aux.faction_data.history
end

do
	local next_push = 0
	function get_next_push()
		if time() > next_push then
			local date = date('*t')
			date.hour, date.min, date.sec = 24, 0, 0
			next_push = time(date)
		end
		return next_push
	end
end

function new_record()
	return T.temp-T.map('next_push', get_next_push(), 'data_points', T.acquire())
end

function read_record(item_key)
	local record = data[item_key] and persistence.read(history_schema, data[item_key]) or new_record()
	if record.next_push <= time() then
		push_record(record)
		write_record(item_key, record)
	end
	return record
end

function write_record(item_key, record)
	data[item_key] = persistence.write(history_schema, record)
	if value_cache[item_key] then
		T.release(value_cache[item_key])
		value_cache[item_key] = nil
	end
end

--pfUI.api.strsplit
local function AuxAddon_strsplit(delimiter, subject)
	if not subject then return nil end
	local delimiter, fields = delimiter or ":", {}
	local pattern = string.format("([^%s]+)", delimiter)
	string.gsub(subject, pattern, function(c) fields[table.getn(fields)+1] = c end)
	return unpack(fields)
  end

--taken from Atlasloot Update announcing code

AUX_data_sharer = CreateFrame("Frame")
AUX_data_sharer:RegisterEvent("CHAT_MSG_CHANNEL")
AUXplayerName = UnitName("player")


AUX_data_sharer:SetScript("OnEvent", function()
	if event == "CHAT_MSG_CHANNEL" and aux.account_data.sharing == true then
		local _,_,source = string.find(arg4,"(%d+)%.")
		if source then
			_,name = GetChannelName(source)
		end
		if name == "LFT" then
			local msg, item_key, munit_buyout_price = AuxAddon_strsplit(",", arg1) --using , as a seperator because item_key contains a :
			if msg == "AuxData" then
				if arg2 ~= AUXplayerName then
					local unit_buyout_price = tonumber (munit_buyout_price)
					--print("received data:" .. msg .. "," .. item_key .. "," .. unit_buyout_price); --for testing (print comes from PFUI)
					local item_record = read_record(item_key)
					if unit_buyout_price > 0 and unit_buyout_price < (item_record.daily_min_buyout or aux.huge) then
						item_record.daily_min_buyout = unit_buyout_price
						write_record(item_key, item_record)
						--print("wrote data"); --for testing (print comes from PFUI)
					end
				end
			end
		end
	end
  end)

  function M.process_auction(auction_record, pages)
	  local item_record = read_record(auction_record.item_key)
	  local unit_buyout_price = ceil(auction_record.buyout_price / auction_record.aux_quantity)
	  local item_key = auction_record.item_key
	  if unit_buyout_price > 0 and unit_buyout_price < (item_record.daily_min_buyout or aux.huge) then
		  item_record.daily_min_buyout = unit_buyout_price
		  write_record(auction_record.item_key, item_record)
		  --AuxAddon:SendCommMessage("GUILD", item_key, unit_buyout_price) relies on acecomm
		  if pages < 15 and aux.account_data.sharing == true then
			  if GetChannelName("LFT") ~= 0 then
				  SendChatMessage("AuxData," .. item_key .."," .. unit_buyout_price , "CHANNEL", nil, GetChannelName("LFT"))
				  --print("sent")
				end
		  end
	  end
  end

--[[ function AuxAddon:OnCommReceive(prefix, sender, distribution, item_key, unit_buyout_price) --copied code from process_auction. <- code for when using acecomm
	print("received data"); --for testing (print comes from PFUI)
	local item_record = read_record(item_key)
	if unit_buyout_price > 0 and unit_buyout_price < (item_record.daily_min_buyout or aux.huge) then
		item_record.daily_min_buyout = unit_buyout_price
		write_record(item_key, item_record)
		--print("wrote data"); --for testing (print comes from PFUI)
	end
end ]]--

function M.data_points(item_key)
	return read_record(item_key).data_points
end

function M.value(item_key)
	if not value_cache[item_key] or value_cache[item_key].next_push <= time() then
		local item_record, value
		item_record = read_record(item_key)
		if getn(item_record.data_points) > 0 then
			local total_weight, weighted_values = 0, T.temp-T.acquire()
			for _, data_point in item_record.data_points do
				local weight = .99 ^ aux.round((item_record.data_points[1].time - data_point.time) / (60 * 60 * 24))
				total_weight = total_weight + weight
				tinsert(weighted_values, T.map('value', data_point.value, 'weight', weight))
			end
			for _, weighted_value in weighted_values do
				weighted_value.weight = weighted_value.weight / total_weight
			end
			value = weighted_median(weighted_values)
		else
			value = item_record.daily_min_buyout
		end
		value_cache[item_key] = T.map('value', value, 'next_push', item_record.next_push)
	end
	return value_cache[item_key].value
end

function M.market_value(item_key)
	return read_record(item_key).daily_min_buyout
end

function weighted_median(list)
	sort(list, function(a,b) return a.value < b.value end)
	local weight = 0
	for _, v in ipairs(list) do
		weight = weight + v.weight
		if weight >= .5 then
			return v.value
		end
	end
end

function push_record(item_record)
	if item_record.daily_min_buyout then
		tinsert(item_record.data_points, 1, T.map('value', item_record.daily_min_buyout, 'time', item_record.next_push))
		while getn(item_record.data_points) > 11 do
			T.release(item_record.data_points[getn(item_record.data_points)])
			tremove(item_record.data_points)
		end
	end
	item_record.next_push, item_record.daily_min_buyout = get_next_push(), nil
end