local unpack = table.unpack
local async_to_sync = function(async_func, callback_pos)
	return function(...)
		local _co = coroutine.running() or error("this function must be run in coroutine")
		local rets
		local waiting = false
		local cb_func = function(...)
			if waiting then
				assert(coroutine.resume(_co, ...))
			else
				rets = {
					...
				}
			end
		end
		local params = {
			...
		}
		table.insert(params, callback_pos or #params + 1, cb_func)
		async_func(unpack(params))
		if rets == nil then
			waiting = true
			rets = {
				coroutine.yield()
			}
		end
		return unpack(rets)
	end
end
local coroutine_call = function(func)
	return function(...)
		local co = coroutine.create(func)
		assert(coroutine.resume(co, ...))
	end
end
local move_end = {}
local generator_mt = {
	__index = {
		MoveNext = function(self)
			self.Current = self.co()
			if self.Current == move_end then
				self.Current = nil
				return false
			else
				return true
			end
		end,
		Reset = function(self)
			self.co = coroutine.wrap(self.w_func)
		end
	}
}
local cs_generator = function(func, ...)
	local params = {
		...
	}
	local generator = setmetatable({
		w_func = function()
			func(unpack(params))
			return move_end
		end
	}, generator_mt)
	generator:Reset()
	return generator
end
local loadpackage = function(...)
	for _, loader in ipairs(package.searchers) do
		local func = loader(...)
		if type(func) == "function" then
			return func
		end
	end
end
local auto_id_map = function()
	local hotfix_id_map = require("hotfix_id_map")
	local org_hotfix = xlua.hotfix
	function xlua.hotfix(cs, field, func)
		local map_info_of_type = hotfix_id_map[typeof(cs):ToString()]
		if map_info_of_type then
			if func == nil then
				func = false
			end
			local tbl = type(field) == "table" and field or {
				[field] = func
			}
			for k, v in pairs(tbl) do
				local map_info_of_methods = map_info_of_type[k]
				local f = type(v) == "function" and v or nil
				for _, id in ipairs(map_info_of_methods or {}) do
					CS.XLua.HotfixDelegateBridge.Set(id, f)
				end
			end
			xlua.private_accessible(cs)
		else
			return org_hotfix(cs, field, func)
		end
	end
end
local hotfix_ex = function(cs, field, func)
	assert(type(field) == "string" and type(func) == "function", "invalid argument: #2 string needed, #3 function needed!")
	local function func_after(...)
		xlua.hotfix(cs, field, nil)
		local ret = {
			func(...)
		}
		xlua.hotfix(cs, field, func_after)
		return unpack(ret)
	end
	xlua.hotfix(cs, field, func_after)
end
local bind = function(func, obj)
	return function(...)
		return func(obj, ...)
	end
end
local enum_or_op = debug.getmetatable(CS.System.Reflection.BindingFlags.Public).__bor
local enum_or_op_ex = function(first, ...)
	for _, e in ipairs({
		...
	}) do
		first = enum_or_op(first, e)
	end
	return first
end
local createdelegate = function(delegate_cls, obj, impl_cls, method_name, parameter_type_list)
	local flag = enum_or_op_ex(CS.System.Reflection.BindingFlags.Public, CS.System.Reflection.BindingFlags.NonPublic, CS.System.Reflection.BindingFlags.Instance, CS.System.Reflection.BindingFlags.Static)
	local m = parameter_type_list and typeof(impl_cls):GetMethod(method_name, flag, nil, parameter_type_list, nil) or typeof(impl_cls):GetMethod(method_name, flag)
	return CS.System.Delegate.CreateDelegate(typeof(delegate_cls), obj, m)
end
local state = function(csobj, state)
	local csobj_mt = getmetatable(csobj)
	for k, v in pairs(csobj_mt) do
		rawset(state, k, v)
	end
	local csobj_index, csobj_newindex = state.__index, state.__newindex
	function state.__index(obj, k)
		return rawget(state, k) or csobj_index(obj, k)
	end
	function state.__newindex(obj, k, v)
		if rawget(state, k) ~= nil then
			rawset(state, k, v)
		else
			csobj_newindex(obj, k, v)
		end
	end
	debug.setmetatable(csobj, state)
	return state
end
local print_func_ref_by_csharp = function()
	local registry = debug.getregistry()
	for k, v in pairs(registry) do
		if type(k) == "number" and type(v) == "function" and registry[v] == k then
			local info = debug.getinfo(v)
			print(string.format("[key] %d [file path] %s [line:] %d.", k, info.short_src, info.linedefined))
		end
	end
end
return {
	async_to_sync = async_to_sync,
	coroutine_call = coroutine_call,
	cs_generator = cs_generator,
	loadpackage = loadpackage,
	auto_id_map = auto_id_map,
	hotfix_ex = hotfix_ex,
	bind = bind,
	createdelegate = createdelegate,
	state = state,
	print_func_ref_by_csharp = print_func_ref_by_csharp
}