local p = {}
local origArgs
local lib_arg = {}
local error = require( 'Module:Error' )
local lib_EC = {}
local element_data = mw.loadData( 'Module:Element/data' )
local series_name_data = {{"錒系元素", "锕系元素", "錒系金屬", "锕系金属", "actinide"},{"鹼金屬", "碱金属", "alkali metal"},{"鹼金屬(預測)", "碱金属(预测)", "alkali metal (predicted)"},{"鹼土金屬", "碱土金属", "alkaline earth metal"},{"鹼土金屬(預測)", "碱土金属(预测)", "alkaline earth metal (predicted)"},{"雙原子非金屬", "双原子非金属", "diatomic nonmetal"},{"雙原子非金屬(預測)", "双原子非金属(预测)", "diatomic nonmetal (predicted)"},{"多原子非金屬", "多原子非金属", "polyatomic nonmetal"},{"多原子非金屬(預測)", "多原子非金属(预测)", "polyatomic nonmetal (predicted)"},{"eka-超錒系元素", "eka-超锕系元素", "下超錒系元素", "eka-superactinide"},{"eka-超錒系元素(預測)", "eka-超锕系元素(预测)", "eka-superactinide (predicted)"},{"惰性氣體", "惰性气体", "稀有氣體", "稀有气体", "noble gas"},{"惰性氣體(預測)", "惰性气体(预测)", "稀有氣體(預測)", "稀有气体(预测)", "noble gas (predicted)"},{"鹵素", "卤素", "halogen"},{"鹵素(預測)", "卤素(预测)", "halogen (predicted)"},{"金屬", "金属", "metal"},{"類金屬", "类金属", "metalloid"},{"類金屬(預測)", "类金属(预测)", "metalloid (predicted)"},{"鑭系元素", "镧系元素", "鑭系金屬", "镧系金属", "lanthanide"},{"其他非金屬", "其他非金属", "非金属", "非金屬", "other non-metal"},{"其他非金屬(預測)", "其他非金属(预测)", "非金屬(預測)", "other non-metal (predicted)"},{"貧金屬", "贫金属", "主族金屬", "主族金属", "post-transition metal"},{"貧金屬(預測)", "贫金属(预测)", "主族金屬(預測)", "主族金属(预测)", "post-transition metal (predicted)"},{"超錒系元素", "超锕系元素", "superactinide"},{"超錒系元素(預測)", "超锕系元素(预测)", "superactinide (predicted)"},{"過渡金屬", "过渡金属", "过渡元素", "過渡元素", "transition metal"},{"過渡金屬(預測)", "过渡金属(预测)", "过渡元素(预测)", "過渡元素(預測)", "transition metal (predicted)"},{"超臨界原子", "離子態", "超临界原子", "离子态", "supercritical atoms", "supercritical atoms (predicted)"},{"無電子", "无电子", "no electron"},{"可能不存在", "maybe not exist"},{"s區元素", "s区元素", "s區", "s区", "s block"},{"s區元素(預測)", "s区元素(预测)", "s區(預測)", "s区(预测)", "s block (predicted)"},{"p區元素", "p区元素", "p區", "p区", "p block"},{"p區元素(預測)", "p区元素(预测)", "p區(預測)", "p区(预测)", "p block (predicted)"},{"d區元素", "d区元素", "d區", "d区", "d block"},{"d區元素(預測)", "d区元素(预测)", "d區(預測)", "d区(预测)", "d block (predicted)"},{"ds區元素", "ds区元素", "ds區", "ds区", "ds block"},{"ds區元素(預測)", "ds区元素(预测)", "ds區(預測)", "ds区(预测)", "ds block (predicted)"},{"f區元素", "f区元素", "f區", "f区", "f block"},{"f區元素(預測)", "f区元素(预测)", "f區(預測)", "f区(预测)", "f block (predicted)"},{"g區元素", "g区元素", "g區", "g区", "g block"},{"g區元素(預測)", "g区元素(预测)", "f區(預測)", "g区(预测)", "g block (predicted)"},{"h區元素", "h区元素", "h區", "h区", "h block"},{"h區元素(預測)", "h区元素(预测)", "h區(預測)", "h区(预测)", "h block (predicted)"},{"未知特性", "未知", "化學性質未知", "化学性质未知", "unknown", "unknown chemical properties"}}

function p.symbol(frame)
	return p._symbol(p._loadArgFromFrame(frame))
end

function p.getAtomicWeight(frame)
	return p._getAtomicWeight(p._loadArgFromFrame(frame))
end

function p.getName(frame)
	return p._getName(p._loadArgFromFrame(frame))
end

function p.getPhase(frame)
	return p._getPhase(p._loadArgFromFrame(frame))
end

function p.link(frame)
	return p._link(p._loadArgFromFrame(frame))
end

function p.check(frame)
	return p._check(p._loadArgFromFrame(frame))
end

function p.neutron(frame)
	return p._neutron(p._loadArgFromFrame(frame))
end

function p._neutron(args)
	--去除模板引用時可能產生的空格
	local eleString='' if (args[1] and args[1] ~= '') then eleString = mw.text.trim(args[1]) else return '' end
	local eleid = p.getListID(eleString)
	local ele1 = p._copytable(element_data[eleid])
	if (eleid==-1) then
		return ''
	end
	if (ele1.correct and ele1.correct  ~= '') then
		return ''
	end
	if (ele1.N and ele1.N ~= '') then
		return ele1.N
	end
	return ''
end

function p.compare_series(frame)
	-- For calling from #invoke.
    local load_args
    if frame == mw.getCurrentFrame() then
        -- We're being called via #invoke. The args are passed through to the module
        -- from the template page, so use the args that were passed into the template.
        if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
        load_args = lib_arg.getArgs(frame) --frame.args
    else
        -- We're being called from another module or from the debug console, so assume
        -- the args are passed in directly.
        load_args = frame
    end
	local args = {}
	for k, v in pairs( load_args ) do
		args[k] = v;	   
	end
	local arg1=''	if (args[1] and args[1] ~= '') then	arg1 = mw.text.trim(args[1]) end
	local arg2=''	if (args[2] and args[2] ~= '') then	arg2 = mw.text.trim(args[2]) end
	return p.compareSeries(arg1, arg2)
end

function p.compareSeries(series1, series2)
	local checked = false
	local series_left, eleSeries
	for v, x in ipairs(series_name_data) do
		for v1, x1 in ipairs(x) do
			if (x1 == series1) then 
				series_left = {x[1]}
				checked = true
				break
			end
		end
		if checked then break end
	end
	if not checked then
		eleSeries = p.getSeries({series1})
		eleSeries = mw.text.split( table.concat(eleSeries, ',') .. ',' .. series1 , ',' ) 
		for index, it in ipairs(eleSeries) do
			checked = false
			for v, x in ipairs(series_name_data) do
				for v1, x1 in ipairs(x) do
					if (x1 == it) then 
						eleSeries[index] = x[1]
						checked = true
						break
					end
				end
				if checked then break end
			end
		end
		series_left = eleSeries
	end
	
	checked = false
	for v, x in ipairs(series_name_data) do
		for v1, x1 in ipairs(x) do
			if (x1 == series2) then 
				series_right = {x[1]}
				checked = true
				break
			end
		end
		if checked then break end
	end
	if not checked then
		eleSeries = p.getSeries({series2})
		eleSeries = mw.text.split( table.concat(eleSeries, ',') .. ',' .. series2 , ','  ) 
		for index, it in ipairs(eleSeries) do
			checked = false
			for v, x in ipairs(series_name_data) do
				for v1, x1 in ipairs(x) do
					if (x1 == it) then 
						eleSeries[index] = x[1]
						checked = true
						break
					end
				end
				if checked then break end
			end
		end
		series_right = eleSeries
	end
	if series_left.predicted then series_left.predicted = nil end
	if series_right.predicted then series_right.predicted = nil end
	for v_left, x_left in ipairs(series_left) do
		for v_right, x_right in ipairs(series_right) do
			if mw.text.trim(x_left) == mw.text.trim(x_right) then return 'yes' end
		end
	end
	if series_left == series_right then return 'yes' end
	return ''
end

function p.series(frame)
	-- For calling from #invoke.
    local load_args
    if frame == mw.getCurrentFrame() then
        -- We're being called via #invoke. The args are passed through to the module
        -- from the template page, so use the args that were passed into the template.
        if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
        load_args = lib_arg.getArgs(frame) --frame.args
    else
        -- We're being called from another module or from the debug console, so assume
        -- the args are passed in directly.
        if type(frame) ~= type({}) then args = {frame}
        else args = frame end
    end
	local args = {}
	for k, v in pairs( load_args ) do
		args[k] = v;	   
	end
	
	local eleSeries = p.getSeries(args)
	if (eleSeries.predicted) then return eleSeries[1] .. '(預測)' end
	return eleSeries[1]
end

function p.getSeries(args)
	--去除模板引用時可能產生的空格
	local eleString='' if (args[1] and args[1] ~= '') then eleString = mw.text.trim(args[1]) else return {'錯誤'} end
	local eleid = p.getListID(eleString)
	local ele1 = p._copytable(element_data[eleid])
	if (eleid==-1) then return {'未知'} end
	if (ele1.correct and ele1.correct  ~= '') then
		eleid = p.getListID(ele1.correct)
		ele1 = p._copytable(element_data[eleid])
		if (eleid==-1) then return {'未知'} end
	end
	if (ele1.series and ele1.series ~= '') then
		if (ele1.predictedSeries and ele1.predictedSeries ~= '') then ele1.series.predicted=1 end
		return ele1.series
	end
	return {'錯誤'}
end

function p.protons(frame)
	return p._protons(p._loadArgFromFrame(frame))
end

function p._protons(args)
	--去除模板引用時可能產生的空格
	local eleString='' if (args[1] and args[1] ~= '') then eleString = mw.text.trim(args[1]) else return '' end
	local eleid = p.getListID(eleString)
	local ele1 = p._copytable(element_data[eleid])
	if (eleid==-1) then
		return ''
	end
	if (ele1.correct and ele1.correct  ~= '') then
		return ''
	end
	if (ele1.Z and ele1.Z ~= '') then
		return ele1.Z
	end
	return ''
end

function p.wikidataID(frame)
    local result = p._wikidataID(p._loadArgFromFrame(frame))
    if result ~= '' then result = 'Q' .. result end
	return result
end

function p._wikidataID(args)
	--去除模板引用時可能產生的空格
	local eleString='' if (args[1] and args[1] ~= '') then eleString = mw.text.trim(args[1]) else return '' end
	local eleid = p.getListID(eleString)
	local ele1 = p._copytable(element_data[eleid])
	if (eleid==-1) then
		return ''
	end
	if (ele1.wikidata and ele1.wikidata ~= '') then
		return ele1.wikidata
	end
	return ''
end

function p.ElementProperty(frame)
	return p._getEleProperty(p._loadArgFromFrame(frame))
end

function p.meltingPoint(frame)return p._getEleProperty(p._loadArgFromFrame(frame),"Melting")end
function p.boilingPoint(frame)return p._getEleProperty(p._loadArgFromFrame(frame),"Boiling")end
function p.density(frame)return p._getEleProperty(p._loadArgFromFrame(frame),"density")end
function p.atomicRadius(frame)return p._getEleProperty(p._loadArgFromFrame(frame),"atomicRadius")end
function p.covalentRadius(frame)return p._getEleProperty(p._loadArgFromFrame(frame),"CovalentRadius")end
function p.vdwRadius(frame)return p._getEleProperty(p._loadArgFromFrame(frame),"vdwRadius")end
function p.electronegativity(frame)return p._getEleProperty(p._loadArgFromFrame(frame),"EN")end

function p._loadArgFromFrame(frame)
	-- For calling from #invoke.
    local args
    if frame == mw.getCurrentFrame() then
        -- We're being called via #invoke. The args are passed through to the module
        -- from the template page, so use the args that were passed into the template.
        if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
        args = lib_arg.getArgs(frame) --frame.args
    else
        -- We're being called from another module or from the debug console, so assume
        -- the args are passed in directly.
        if type(frame) ~= type({}) then args = {frame}
        else args = frame end
    end
    return args
end

function p._getEleProperty(args, _prop)
	local prop = _prop
	if _prop==nil then prop = args[2] or args.prop
		if prop == nil then return ''
		else prop = mw.text.trim(prop) end
	end
	local eleString='' 
	if type(args) == type("string") or type(args) == type(0) then eleString = mw.text.trim(tostring(args)) 
	elseif (args[1] and args[1] ~= '') then eleString = mw.text.trim(args[1]) else return '' end --去除模板引用時可能產生的空格
	local eleid = p.getListID(eleString)
	local ele1 = p._copytable(element_data[eleid])
	if (eleid==-1) then
		return ''
	end
	if (ele1[prop] and ele1[prop] ~= '') then
		return ele1[prop]
	end
	return ''
end

function p._getName(args)
	--去除模板引用時可能產生的空格
	local eleString='' if (args[1] and args[1] ~= '') then eleString = mw.text.trim(args[1]) else return error.error{ '未輸入元素' } end

	local eleid = p.getListID(eleString)
	local ele1 = p._copytable(element_data[eleid])
	if (eleid==-1) then
		return error.error{ '未知的元素“' .. args[1] .. '”' } .. '[[Category:含有錯誤元素符號的條目]]'
	end
	return ele1.name
end

function p._check(args)
	--去除模板引用時可能產生的空格
	local eleString='' if (args[1] and args[1] ~= '') then eleString = mw.text.trim(args[1]) else return error.error{ '未輸入元素' } end
	local linkString='' if (args['link'] and args['link'] ~= '') then	linkString = mw.text.trim(args['link']) end
	if (linkString and linkString  ~= '') then
		if (linkString == 'yes') then
			pagetest=true
		end
	end
	local eleid = p.getListID(eleString)
	local ele1 = p._copytable(element_data[eleid])
	if (eleid==-1) then
		return error.error{ '未知的元素“' .. args[1] .. '”' } .. '[[Category:含有錯誤元素符號的條目]]'
	end
	if (ele1.correct and ele1.correct  ~= '') then
		return error.error{ '“' .. args[1] .. '”不是“'.. ele1.correct .. '”的正確拼法。' }
	end
	if (ele1.page and ele1.page ~= '') then
		return ''
	end
	if(pagetest)then
		return error.error{ '元素“' .. args[1] .. '”' .. '沒有對應的頁面。'}
	else
		return ''
	end
end

function p._symbol(args)
	if not(args[1] and args[1] ~= '') then return error.error{ '未輸入元素' } end
	local myString = mw.text.trim(args[1]) --去除模板引用時可能產生的空格
	local eleid = p.getListID(myString)
	if (eleid==-1) then
		if(tonumber(myString) or -1 > 0)then
			local ele_tmp = p.getElementByZ(tonumber(myString))
			if(ele_tmp and ele_tmp.Symbol)then return ele_tmp.Symbol end
		end
		return error.error{ '未知的元素“' .. args[1] .. '”' } .. '[[Category:含有錯誤元素符號的條目]]'
	end
	local ele1 = p._copytable(element_data[eleid])
	if(ele1.NotElement)then
		return ele1.Symbol
	end
	if (ele1.Z == nil) then return ele1.Symbol end
	local num = ele1.Z + (ele1.N or 0) --計算質量數
	local n = (ele1.N or 0)
	local number=tonumber(args[2])
	if (number and number  ~= '') then
		num = number
		n = num - ele1.Z
		if (n > 0) then --讀到有效的原子量才會進來這裡執行
			if (ele1.Isotope) then
				for v, x in ipairs(ele1.Isotope) do
					if (x.N == n) then
						if (x.Symbol and x.Symbol  ~= '') then
							return x.Symbol
						end
					end
				end
			end
		end
	end
	return ele1.Symbol 
end

function p._link(args)
	--去除模板引用時可能產生的空格
	local arg1=''	if (args[1] and args[1] ~= '') then	arg1 = mw.text.trim(args[1]) else return error.error{ '未輸入元素' } end
	local arg2=''	if (args[2] and args[2] ~= '') then	arg2 = mw.text.trim(args[2]) end
	local arg3=''	if (args[3] and args[3] ~= '') then	arg3 = mw.text.trim(args[3]) end
	local eleid = p.getListID(arg1)
	local has_m=''
	if (arg3 and arg3  ~= '') then
		has_m=arg3
	end
	if (eleid == -1) then
		return error.error{ '未知的元素“' .. arg1 .. '”' } .. '[[Category:含有錯誤元素符號的條目]]'
	end
	local ele1 = p._copytable(element_data[eleid])
	if(ele1.NotElement)then
		return ele1.page
	end
	if (ele1.page and ele1.page  ~= '') then
		local num = ele1.Z + (ele1.N or 0) --計算質量數
		local n = ele1.N
		local hasmass=false
		local number=tonumber(arg2)
		if (number and number  ~= '') then
			num = number
			n = num - ele1.Z
			hasmass=true
			if (n < 0) then
				return error.error{ '中子數不得為“' .. n .. '”' }
			end
		else
			if (args2 and args2 ~= '') then
				return error.error{ '未知的質量數“' .. args2 .. '”' }
			end
		end
		if (hasmass == true) then
			if (ele1.Isotope) then
				for v, x in ipairs(ele1.Isotope) do
					if (x.N == n) then
						if (x.page and x.page  ~= '') then
							return  x.page
						else
							return error.error{ '元素“' .. args[1] .. '”' .. '質量數為“'.. num  ..'”的同位素沒有對應的頁面。'}
						end
					end
				end
				return ele1.page .. '-' .. num .. has_m
			end
		end
		return ele1.page 
	end
	return error.error{ '元素“' .. args[1] .. '”' .. '沒有對應的頁面。'}
end

--This notation states that the various sources on Earth have substantially different isotopic constitutions, and uncertainties are incorporated in the two numbers. For these elements, there is not an 'Earth average' constitution, and the 'right' value is not its middle 
p.conventional_atomic_weight={H=1.008,Li=6.941,B=10.81,C=12.011,N=14.007,O=15.999,Mg=24.305,Si=28.085,S=32.04,Cl=35.45,Ar=39.948,Br=79.904,Tl=204.38}
function p._get_atomic_weight(element)
	if (element) then
		if(type(element.stdAtomicWeight) == type(0))then return element.stdAtomicWeight , true
		else
			if(p.conventional_atomic_weight[element.Symbol or ''])then return p.conventional_atomic_weight[element.Symbol or ''] , true end
			if(type(element.stdAtomicWeight) == type({0,0}))then return element.stdAtomicWeight[1] , true end
		end
		if (element.Z and element.N) then return (element.Z + element.N) , false end
	end
	return nil
end

function p._getAtomicWeight(args)
	--去除模板引用時可能產生的空格
	local eleString='' if (args[1] and args[1] ~= '') then eleString = mw.text.trim(args[1]) else return '' end
	local eleid = p.getListID(eleString)
	local ele1 = p._copytable(element_data[eleid])
	if (eleid==-1) then
		return ''
	end
	local Weight, is_natural = p._get_atomic_weight(ele1)
	if Weight then
		if is_natural ~= true then
			return '[' .. Weight ..']'
		end
		return Weight
	end
	return ''
end

function p._get_phase(element, temperature)
	local test_temperature = temperature or 298.15 --STP
	if (element) then
		if element.Melting then
			if element.Melting > test_temperature then --STP
				return "solid"
			end
		end
		if element.Boiling then
			if element.Boiling > test_temperature then --STP
				return "liquid"
			else
				return "gas"
			end
		end
	end
	return nil
end

function p._getPhase(args)
	--去除模板引用時可能產生的空格
	local eleString='' if (args[1] and args[1] ~= '') then eleString = mw.text.trim(args[1]) else return '' end
	local temperature	= 298.15 if (args[2] and args[2] ~= '') then temperature = tonumber( mw.text.trim(args[2]) ) or 298.15 end
	local eleid = p.getListID(eleString)
	local ele1 = p._copytable(element_data[eleid])
	if (eleid==-1) then
		return ''
	end
	return p._get_phase(ele1) or 'unknown'
end

function p.getListID(_names)
	local names = _names
	if type(_names)==type({})then
		if type(_names.args)==type({})then
			names = _names.args['1'] or _names.args[1]
		elseif _names['1'] or _names[1] or _names.name then
			names = _names['1'] or _names[1] or _names.name
		end
	end
	local body ='' 
	if tonumber(names) or type(names) == type(0) then
		local index = tonumber(names)
		for v, x in ipairs(element_data) do                                
			if (x.Z == index) then
				return  v
			end
		end
	end
	i=1
	for v, x in ipairs(element_data) do                                
		if ((x.name == names) or (x.page == names)) then
			return  i
		end
		for v1, x1 in ipairs(x.othername) do
			if (x1 == names) then
				return  i
			end
		end
		i=i+1
	end
	return -1 
end

function p.decaylink(frame)
	return p._decaylink(p._loadArgFromFrame(frame))
end

function p.elementlink(frame)
	return p._elementlink(p._loadArgFromFrame(frame))
end

function p._elementlink(args)
	local arg1=''	if (args[1] and args[1] ~= '') then	arg1 = mw.text.trim(args[1]) else return '' end
	local arg2=''	if (args[2] and args[2] ~= '') then	arg2 = mw.text.trim(args[2]) end
	local eleid = p.getListID(arg1)
	if (eleid==-1) then
		return error.error{ '未知的元素“' .. arg1 .. '”' } .. '[[Category:含有錯誤元素符號的條目]]'
	end
	local ele1 = p._copytable(element_data[eleid])
	local symbol1=ele1.Symbol
	if(arg2 and arg2 ~= '')then if(arg2 ~= '1' )then
		if (ele1.compound)then symbol1 ='(' .. symbol1 .. ')' end
		symbol1 = symbol1 .. '<sub>' .. arg2 .. '</sub>'
	end end
	if (ele1.compound)then
		return '[[' .. ele1.page .. '|' .. symbol1 .. ']]'
	end
	if (ele1.NotElement)then
		return error.error{ '“' .. args[1] .. '”不是元素。'}
	end
	if (ele1.correct and ele1.correct  ~= '') then
		return error.error{ '“' .. args[1] .. '”不是“'.. ele1.correct .. '”的正確拼法。' }
	end
	if (ele1.page and ele1.page  ~= '') then
		return '[[' .. ele1.page .. '|' .. symbol1 .. ']]'
	else
		return error.error{ '元素“' .. args[1] .. '”沒有對應的頁面。'}
	end
	return ''
end

function p._element_symbol(args)
	local arg1=''	if (args[1] and args[1] ~= '') then	arg1 = mw.text.trim(args[1]) else return '' end
	local arg2=''	if (args[2] and args[2] ~= '') then	arg2 = mw.text.trim(args[2]) end
	local eleid = p.getListID(arg1)
	if (eleid==-1) then
		return error.error{ '未知的元素“' .. arg1 .. '”' } .. '[[Category:含有錯誤元素符號的條目]]'
	end
	local ele1 = p._copytable(element_data[eleid])
	local symbol1=ele1.Symbol
	if(arg2 and arg2 ~= '')then if(arg2 ~= '1' )then
		if (ele1.compound)then symbol1 ='(' .. symbol1 .. ')' end
		symbol1 = symbol1 .. '<sub>' .. arg2 .. '</sub>'
	end end
	if (ele1.compound)then
		return symbol1
	end
	if (ele1.NotElement)then
		return error.error{ '“' .. args[1] .. '”不是元素。'}
	end
	if (ele1.correct and ele1.correct  ~= '') then
		return error.error{ '“' .. args[1] .. '”不是“'.. ele1.correct .. '”的正確拼法。' }
	end
	if (ele1.page and ele1.page  ~= '') then
		return symbol1
	else
		return error.error{ '元素“' .. args[1] .. '”沒有對應的頁面。'}
	end
	return ''
end

function p._decaylink(args)
	local arg1=''	if (args[1] and args[1] ~= '') then	arg1 = mw.text.trim(args[1]) else return '' end
	if(arg1=='p') then arg1='p+'end if(arg1=='n') then arg1='n0'end
	local decayid = p.getListID(arg1)
	if (decayid==-1) then
		return ''
	end
	local decay1 = p._copytable(element_data[decayid])
	if (decay1.decay)then
		return '[[' .. decay1.page .. '|' .. decay1.Symbol .. ']]'
	end
	return ''
end

p.IUPAC = { [0] = 'n', [1] = 'u', [2] = 'b', [3] = 't', [4] = 'q', [5] = 'p', [6] = 'h', [7] = 's', [8] = 'o', [9] = 'e' }
p.IUPAC_name = { [0] = 'nil', [1] = 'un', [2] = 'bi', [3] = 'tri', [4] = 'quad', [5] = 'pent', 
					[6] = 'hex', [7] = 'sept', [8] = 'oct', [9] = 'enn', [10] = 'ium', [11] = 'um' }

function p.DecodeByIUPAC_rules(symbol_data)
	local symbol = mw.ustring.lower(symbol_data)
	local symbol_len = mw.ustring.len(symbol)
	local Z_data = ''
	for i = 1, symbol_len do
		local get_id = nil
		for j = 0, 9 do if mw.ustring.sub(symbol ,i, i) == p.IUPAC[j] then get_id = j end end
		if get_id == nil then return nil end
		Z_data = Z_data .. get_id
	end
	return tonumber(Z_data)
end

function p.outputLuaListTemplate()
	local body=''
	for _, ele in ipairs(element_data) do
		body = body .. "\t[\"" .. ele.name .. "\"] = {  },\n"
	end
	return "{\n" .. body .. '}'
end

function p.getElementByIUPAC_rules(index_input)
	local result = ''
	local result_name = ''
	local index = tonumber(index_input)
	if index ~= nil then index = math.floor(index) else index = 0 end
	local index_str = '' .. index
	local index_len = mw.ustring.len(index_str)
	if index > 100 then
		for i = 1, index_len do
			local data = p.IUPAC[tonumber('' .. mw.ustring.sub(index_str ,i, i)) or 0]
			local name = p.IUPAC_name[tonumber('' .. mw.ustring.sub(index_str ,i, i)) or 0]
			if i == 1 then 
				result = result .. mw.ustring.upper(data)
				result_name = result_name .. mw.ustring.upper(mw.ustring.sub(name,1,1)) .. mw.ustring.sub(name,2,-1)
			else
				result = result .. data
				result_name = result_name .. name
			end
		end
	end
	if result == '' then
		return nil
	end
	local result_name_index = 11 if mw.ustring.sub(result_name,-1,-1) ~= 'i' then result_name_index = result_name_index - 1 end
	return { name=result_name .. p.IUPAC_name[result_name_index] , page=result, Symbol=result, Z=index }
end

function p.getElementByZ(index)
	local body =''         
	for v, x in ipairs(element_data) do                                
		if (x.Z == index) then
			return p._copytable(x)
		end
	end
	if index > 0 then
		return p._copytable(p.getElementByIUPAC_rules(index))
	end
	return nil 
end

function p.next_element(symbol)
	local eleid = p.getListID(symbol)
	local ele1 = p._copytable(element_data[eleid])
	
	if ele1 == nil then ele_z = p.DecodeByIUPAC_rules(symbol) else if ele1.Z == nil then
		ele_z = p.DecodeByIUPAC_rules(symbol) else ele_z = ele1.Z end
	end

	if ele_z ~= nil then
		return p.getElementByZ(ele_z + 1)
	end
	return nil
end

function p.last_element(symbol)
	local eleid = p.getListID(symbol)
	local ele1 = p._copytable(element_data[eleid])
	
	if ele1 == nil then ele_z = p.DecodeByIUPAC_rules(symbol) else if ele1.Z == nil then
		ele_z = p.DecodeByIUPAC_rules(symbol) else ele_z = ele1.Z end
	end

	if ele_z ~= nil then
		return p.getElementByZ(ele_z - 1)
	end
	return nil
end

function p._copytable(input_table)
	local output_table
	if type(input_table) == type({}) then
		output_table = {}
		for k,v in pairs(input_table) do
			local temp
			if type(input_table) == type({}) then
				temp = mw.clone(p._copytable(v))
			elseif type(input_table) == type(tonumber) then
			else
				temp = mw.copy(v)
			end
			output_table[k]=temp
		end
	elseif type(input_table) == type(tonumber) then
		--do nothing
	else
		output_table = mw.clone(input_table)
	end
	return output_table
end

function p.ElectronConfiguration(frame)
	if type(lib_EC.ElectronConfiguration) ~= type(function()end) then lib_EC = require( 'Module:Element/ElectronConfiguration' ) end
	return lib_EC.ElectronConfiguration(frame)
end

function p._ElectronConfiguration(args)
	if type(lib_EC._ElectronConfiguration) ~= type(function()end) then lib_EC = require( 'Module:Element/ElectronConfiguration' ) end
	return lib_EC._ElectronConfiguration(args)
end
function p.htmleleconf(eleconf, showall)
	if type(lib_EC._eleconftostring) ~= type(function()end) then lib_EC = require( 'Module:Element/ElectronConfiguration' ) end
	return lib_EC._eleconftostring(eleconf, showall)
end

--本模塊的沙盒(測試)函數
function p.sandbox(frame)
	-- For calling from #invoke.
    local args
    if frame == mw.getCurrentFrame() then
        -- We're being called via #invoke. The args are passed through to the module
        -- from the template page, so use the args that were passed into the template.
        if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
        args = lib_arg.getArgs(frame) --frame.args
    else
        -- We're being called from another module or from the debug console, so assume
        -- the args are passed in directly.
        args = frame
    end
	return p._elementlink(args)
end
function p._sandbox(args)
	return element_data[p.getListID(args[1])].name 
end
return p