--------------------------
--Dubs's Text Calculator--
-------Version: 1.9-------
--------------------------
--[[notes
lua function
]]--
--options
local usecolor = true
local docutscenes = true
local autoclear = false
local autoclearinterval = 20
local cutsceneinterval = 0.25
local using_touchlua_app = true
local createfiles = true
--code
require "draw"
function print2(input)
    io.write(input.."\n")
end
function print(input)
    if input==nil then input="" end
    if input==true then input="true" end
    if input==false then input="false" end
    local file=io.open("calculator logs.txt","a+")
    if file:read()=="" then file:write(input)
else do file:write("\n"..input) end end
    file:close()
    print2(input)
end
function clearlog()
    file=io.open("calculator logs.txt","w")
    file:write()
    file:close()
end
crashcount=0
local match="[1234567890/-*^+().#]"
local notmatch=[=[[qwertyuiopasdfghjklzxcvbnm:;$&@?!'"{}_\|~<>€£¥]]=]
local x=0
if using_touchlua_app and docutscenes then cutsceneinterval=cutsceneinterval*1000 end
if not io.open("calculator logs.txt","r") and createfiles then
    file=io.open("calculator memory.txt","w")
    file:close()
end
if not io.open("calculator memory.txt","r") and createfiles then
    file=io.open("calculator memory.txt","w")
    file:write("-----------------\nCalculator Recall\n-----------------\n")
    file:close()
end
::cls::
os.execute("cls") clearlog()
prev=nil
function callable(f)
    return function(...)
        error, result = pcall(f, ...)
        if error then
            return true
        else
            return false
        end
    end
end
function get(getFile)
    local file=io.open(getFile,"r")
    local getOut=file:read("*a")
    file:close()
    print("[[[start get]]]")
    print()
    print(getOut)
    print()
    print("[[[end get]]]")
end
function slowprint(text,delay)
    delay=delay or 125
    for x=1,string.len(text) do
        char=string.sub(text,x,x)
        io.write(char)
        sleep(delay)
    end
end
function factorial(n)
    n=tonumber(n)
    return n > 0 and n * factorial(n-1) or 1
end
function percent(perc,tot)
    return (perc/100)*tot
end
function ee(zero,to)
    return zero*(10^to)
end
function simplify(calcin)
    a,b=calcin:match"(.+)/(.+)"u,v=a,b while v+0>0 do t=u u=v v=t%v end
    return a+0==a/u and a.."/"..b or a/u.."/"..b/u
end
function split(inputstr, sep)
    if sep == nil then
        sep = "%%"
    end
    local t={} ; i=1
    for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
        t[i] = str
        i = i + 1
    end
    return t
end
function IsPrime(n)
    for i = 2, n^(1/2) do
        if (n % i) == 0 then
            return false
        end
    end
    return true
end
function GetFileSize( filename )
    local fp = io.open( filename )
    if fp == nil then
        return nil
    end
    local filesize = fp:seek( "end" )
    fp:close()
    return filesize
end
function PrimeDecomp( n )
    local f = {}
    if IsPrime( n ) then
        f[1] = n
        return f
    end
    local i = 2
    repeat
        while n % i == 0 do
            f[#f+1] = i
            n = n / i
        end
        repeat
            i = i + 1
        until IsPrime( i )
    until n == 1
    return f
end
function Factors( n )
    local f = {}
    for i = 1, n/2 do
        if n % i == 0 then
            f[#f+1] = i
        end
    end
    f[#f+1] = n
    return f
end
if not using_touchlua_app or not callable(sleep) then
    local clock = os.clock
    function sleep(n)  -- seconds
        local t0 = clock()
        while clock() - t0 <= n do end
    end
end
function print_r ( t )
    local print_r_cache={}
    local function sub_print_r(t,indent)
        if (print_r_cache[tostring(t)]) then
            print(indent.."*"..tostring(t))
        else
            print_r_cache[tostring(t)]=true
            if (type(t)=="table") then
                for pos,val in pairs(t) do
                    if (type(val)=="table") then
                        print(indent.."["..pos.."] => "..tostring(t).." {")
                        sub_print_r(val,indent..string.rep(" ",string.len(pos)+8))
                        print(indent..string.rep(" ",string.len(pos)+6).."}")
                    else
                        print(indent.."["..pos.."] => "..tostring(val))
                    end
                end
            else
                print(indent..tostring(t))
            end
        end
    end
    sub_print_r(t,"  ")
end
if usecolor and using_touchlua_app then
    sys.setbgcolor(draw.black)
    sys.setcolor(draw.red)
end
if usecolor and using_touchlua_app then
    sys.setbgcolor(draw.black)
    sys.setcolor(draw.green)
end
if docutscenes then
    print("Booting") print("- - -")
    sleep(cutsceneinterval)
    os.execute("cls") clearlog()
    print("Booting") print("| - -")
    sleep(cutsceneinterval)
    os.execute("cls") clearlog()
    print("Booting") print("| | -")
    sleep(cutsceneinterval)
    os.execute("cls") clearlog()
    print("Booting") print("| | |")
    sleep(cutsceneinterval)
end
::reclc::
os.execute("cls")
if not slowp then print("Enter an equation. * is multiply, / is divide, ^ followed by a number is an exponent. Type help to get advanced functions.") end
if slowp==true then calcin=string.gsub(string.lower(calcin),"slowprint ","") local file=io.open("calculator logs.txt","r") log=file:read("*a") file:close() io.write("Enter an equation. * is multiply, / is divide, ^ followed by a number is an exponent. Type help to get advanced functions.") print(log) sleep(5000) slowprint(calcin,200) io.write("\n") slowp=false end
clearlog()
::recalc::
print("-------------")
::redocalc::
calcin = io.read()
if string.match(string.lower(calcin),"debug") then
    ::drawdebug::
    if usecolor and using_touchlua_app then
        sys.setbgcolor(draw.black)
        sys.setcolor(draw.red)
    end
    os.execute("cls")
    print("Debug mode enabled. Anti-crash safeguards disabled while in this mode. Debug commands enabled while in this mode. Scary red font enabled while in this mode. Type exit to leave.")
    ::redebug::
    print("=============")
    io.write("debug> ")
    local debugin=io.read()
    debugin=string.lower(debugin)
    if string.match(debugin,"panic") and createfiles==true then
        file=io.open("calculator memory.txt","w")
        file:write("-----------------\nCalculator Recall\n-----------------\n")
        file:close()
        clearlog()
        goto drawdebug
    end
    if debugin=="exit" then
        if usecolor and using_touchlua_app then
            sys.setbgcolor(draw.black)
            sys.setcolor(draw.green)
        end
        goto cls
    end
    if debugin=="cls" then goto drawdebug end
    if debugin=="console" or debugin=="lua" then
        if usecolor and using_touchlua_app then
            sys.setcolor(draw.blue)
            os.execute("cls")
            while true do
                io.write("Lua> ")
                local luaIn=io.read()
                if luaIn=="exit" then break end
                load(luaIn)()
            end
            goto drawdebug
        end
    end
    if string.match(debugin,"get") then
        if string.match(debugin,"history") then
            get("calculator memory.txt")
            goto redebug
        elseif string.match(debugin,"logs") then
            get("calculator logs.txt")
            goto redebug
        end
    end
    if string.match(debugin,"sqrt") then
        debugin=string.lower(debugin)
        input=debugin
        debugin = string.gsub(debugin,"sqrt","")
        debugin=math.sqrt(debugin)
        print("="..debugin)
        glrb=debugin
        debugin=input
        goto redebug
    elseif string.match(debugin,"factors") then
        debugin=string.lower(debugin)
        glrb=debugin
        debugin = string.gsub(debugin,"factors","")
        debugin=Factors(debugin)
        print_r(debugin)
        goto redebug
    elseif string.match(debugin,"primefacs") then
        debugin=string.lower(debugin)
        glrb=debugin
        debugin = string.gsub(debugin,"primefacs","")
        debugin=tonumber(debugin)
        debugin=PrimeDecomp(debugin)
        print_r(debugin)
        goto redebug
    elseif string.match(debugin,"%%") then
        input=debugin
        tab=split(debugin)
        perc=tab[1]
        tot=tab[2]
        glrb=percent(perc,tot)
        print("="..glrb)
        debugin=input
        goto redebug
    elseif string.match(debugin,"ee") then
        input=debugin
        tab=split(debugin,"ee")
        zero=tab[1]
        to=tab[2]
        glrb=ee(zero,to)
        print("="..glrb)
        debugin=input
        goto redebug
    elseif string.match(debugin,"simplify") then
        input=debugin
        debugin=string.gsub(debugin,"simplify","")
        glrb=simplify(debugin)
        print("="..glrb)
        debugin=input
        goto redebug
    elseif string.match(debugin,"factorial") then
        input=debugin
        debugin=string.gsub(debugin,"factorial","")
        debugin=string.lower(debugin)
        glrb=factorial(debugin)
        print("="..glrb)
        debugin=input
        goto redebug
    elseif string.match(debugin,"intocm") then
        input=debugin
        debugin=string.gsub(debugin,"intocm","")
        glrb=debugin*2.54
        print("="..glrb)
        debugin=input
        goto redebug
    elseif string.match(debugin,"cm>in") then
        input=debugin
        debugin=string.gsub(debugin,"cm>in","")
        glrb=debugin/2.54
        print("="..glrb)
        debugin=input
        goto redebug
    elseif string.match(debugin,"ft>m") then
        input=debugin
        debugin=string.gsub(debugin,"ft>m","")
        glrb=debugin*3.28
        print("="..glrb)
        debugin=input
        goto redebug
    end
    func = assert(load("return " .. debugin))
    glrb = func()
    if string.match(glrb,"-") then
        print("=("..glrb..")")
    else do
            print("="..glrb)
        end
    end
    goto redebug
end
if calcin=="an equation" then
    os.execute("cls") clearlog()
    slowprint("Good job.") sleep(3000) slowprint("\nYou win.") sleep(3000) slowprint("\nI'm out.") sleep(3000) slowprint("\nGG.") sleep(3000) os.exit()
end
if prevcalcin==calcin then crashcount=crashcount+1 end
if prevcalcin~=calcin then crashcount=0 end
if crashcount>=10 then error("keyspam detected.") end
prevcalcin = calcin
if string.match(string.lower(calcin),"slowprint ") then slowp=true goto reclc end
local file=io.open("calculator logs.txt","a+")
file:write("\n"..calcin)
file:close()
calcin=string.lower(calcin)
if string.match(calcin,"panic") and createfiles==true then
    file=io.open("calculator memory.txt","w")
    file:write("-----------------\nCalculator Recall\n-----------------\n")
    file:close()
    clearlog()
    goto cls
elseif calcin=="cls" or calcin=="clear" then x=x+1 if x==20 and autoclear then os.execute("cls") clearlog()  goto recalc else end  goto cls
elseif string.match(calcin,"#") and not prev then goto recalc
elseif calcin=="clearmem" and createfiles==true then
    os.execute("cls") clearlog()
    print("Would you like to clear the calculator's memory file? \n(yes/no)")
    if string.lower(io.read())~="yes" then goto reclc end
    os.execute("cls") clearlog()
    print("Are you absolutely sure that you want to clear the calculator's memory file? \n(yes/no)")
    if string.lower(io.read())~="yes" then goto reclc end
    os.execute("cls") clearlog()
    print("Last chance to stop. Are you sure that you would like to clear the calculator's memory file? \n(yes/no)")
    if string.lower(io.read())~="yes" then goto reclc end
    os.execute("cls") clearlog()
    print("Alright. Clearing calculator's memory file...") print("- - -") sleep(cutsceneinterval) os.execute("cls") clearlog()
    print("Alright. Clearing calculator's memory file...") print("| - -") sleep(cutsceneinterval) os.execute("cls") clearlog()
    print("Alright. Clearing calculator's memory file...") print("| | -") sleep(cutsceneinterval) os.execute("cls") clearlog()
    print("Alright. Clearing calculator's memory file...") print("| | |") sleep(cutsceneinterval) os.execute("cls") clearlog()
    file=io.open("calculator memory.txt","w")
    file:write("-----------------\nCalculator Recall\n-----------------\n")
    file:close()
    print([=[Calculator's memory file "calculator memory.txt" has been cleared.]=])
    print("Press any button to continue.")
    io.read()
    goto cls
elseif calcin=="" or calcin==" " then x=x+1 if x==20 and autoclear then os.execute("cls") clearlog()  goto recalc else end  goto recalc
elseif string.match(calcin,",") then
    calcin=string.gsub(calcin,",","")
elseif string.match(calcin,"=") then
    calcin=string.gsub(calcin,"=","")
elseif calcin=="time" then
    os.execute("cls")
    local file=io.open("calculator logs.txt","r")
    log=file:read("*a")
    file:close()
    io.write("Enter an equation. * is multiply, / is divide, ^ followed by a number is an exponent. Type help to get advanced functions.")
    local log=string.gsub(log,"\ntime","")
    print(log)
    time=os.date("%I:%M:%S %p on %A, %B %d, %Y")
    print(time)
    goto recalc
elseif calcin=="help" then print("-------------")print([=[time = get the date and time
sqrt = type this, followed by a number, to get that
       number's square root (i.e. sqrt10)
factors = type this, followed by a number, to get that
          number's factors (i.e. factors10)
simplify = type this, followed by a fraction, to get the
           simplified version of that fraction (i.e.
           simplify2/4)
factorial = type this, followed by a number, to get the
            result of multiplying a series of descending
            numbers, starting with the given number (i.e.
            factorial5)
cmtoin = type this, followed by a number in centimeters,
         to convert that number to inches (i.e. cmtoin42)
intocm = type this, followed by a number in inches, to
         convert that number to centimeters (i.e. intocm8)
mtoft = type this, followed by a number in meters, to
        convert that number to feet (i.e. mtoft5)
fttom = type this, followed by a number in feet, to
        convert that number to meters (i.e. fttom16)
# = substitute for the previous result
slowprint = type this, followed by a space and some
            text, to print out that text after 5 seconds
            (i.e. slowprint hello)
% = type a number, followed by %, followed by another
    number, to get the number that is the first number's
    percentage of the second number (i.e. 10%20)
pi = substitute for the first 14 digits of pi (i.e. pi*pi)
ee = substitute for [first number]*10^[second number]
     (i.e. 2ee4)
sq = substitute for ^2 (i.e. 2sq)
cu = substitute for ^3 (i.e. 3cu)
clear = type this to clear the screen
cls = alias for clear
primefacs = type this, followed by a number, to get the
            prime factors of that number (i.e. primefacs10)
clearmem = clear the "calculator memory.txt" file]=])
end
if not string.match(calcin,match) or string.match(calcin,"=") then goto recalc
elseif string.match(calcin,match) then
    if not string.match(calcin,"sqrt") then
        calcin=string.gsub(calcin,"sq","^2")
    end
    calcin=string.gsub(calcin,"pi",math.pi)
    if prev then
        calcin = string.gsub(calcin,"#",prev)
    end
    --start
    if string.match(calcin,"sqrt") and string.match(calcin,"[0123456789]") and not string.match(calcin," ") then
        calcin=string.lower(calcin)
        input=calcin
        calcin = string.gsub(calcin,"sqrt","")
        if string.match(calcin,notmatch) or string.match(calcin,"[/-*^+()#]") then goto recalc end
        pc,calcin=pcall(math.sqrt,calcin)
        if not pc then goto recalc end
        print("="..calcin)
        glrb=calcin
        calcin=input
        goto skipcalcu
    elseif string.match(calcin,"factors") and string.match(calcin,"[0123456789]") and not string.match(calcin," ") then
        calcin=string.lower(calcin)
        glrb=calcin
        calcin = string.gsub(calcin,"factors","")
        if string.match(calcin,notmatch) or string.match(calcin,"[/-*^+()#]") then goto recalc end
        pc,calcin=pcall(Factors,calcin)
        if not pc then goto recalc end
        print_r(calcin)
        goto noprev
    elseif string.match(calcin,"primefacs") and string.match(calcin,"[0123456789]") and not string.match(calcin," ") then
        calcin=string.lower(calcin)
        glrb=calcin
        calcin = string.gsub(calcin,"primefacs","")
        if string.match(calcin,notmatch) or string.match(calcin,"[/-*^+()#]") then goto recalc end
        calcin=tonumber(calcin)
        pc,calcin=pcall(PrimeDecomp,calcin)
        if not pc then goto recalc
            print_r(calcin)
            goto noprev
        elseif string.match(calcin,"%%") and string.match(calcin,match) and not string.match(calcin," ") then
            input=calcin
            tab=split(calcin)
            if string.match(tab[1],notmatch) or string.match(tab[1],"[/-*^+()#]") then goto recalc end
            if string.match(tab[2],notmatch) or string.match(tab[2],"[/-*^+()#]") then goto recalc end
            perc=tab[1]
            tot=tab[2]
            pc,glrb=pcall(percent,perc,tot)
            if not pc then goto recalc end
            print("="..glrb)
            calcin=input
            goto skipcalcu
        elseif string.match(calcin,"ee") and string.match(calcin,match) and not string.match(calcin," ") then
            input=calcin
            tab=split(calcin,"ee")
            if string.match(tab[1],notmatch) or string.match(tab[1],"[/-*^+()#]") then goto recalc end
            if string.match(tab[2],notmatch) or string.match(tab[2],"[/-*^+()#]") then goto recalc end
            zero=tab[1]
            to=tab[2]
            pc,glrb=pcall(ee,zero,to)
            if not pc then goto recalc end
            print("="..glrb)
            calcin=input
            goto skipcalcu
        elseif string.match(calcin,"simplify") and string.match(calcin,match) and string.match(calcin,"/") and not string.match(calcin," ") then
            input=calcin
            calcin=string.gsub(calcin,"simplify","")
            if string.match(calcin,notmatch) or string.match(calcin,"[-*^+()#]") then goto recalc end
            pc,glrb=pcall(simplify,calcin)
            if not pc then goto recalc end
            print("="..glrb)
            calcin=input
            goto skipcalcu
        elseif string.match(calcin,"factorial") and string.match(calcin,match) and not string.match(calcin," ") then
            input=calcin
            calcin=string.gsub(calcin,"factorial","")
            calcin=string.lower(calcin)
            if string.match(calcin,notmatch) or string.match(calcin,"[-*^+()#]") then goto recalc end
            pc,glrb=pcall(factorial,calcin)
            if not pc then goto recalc end
            print("="..glrb)
            calcin=input
            goto skipcalcu
        elseif string.match(calcin,"intocm") and string.match(calcin,match) and not string.match(calcin," ") then
            input=calcin
            calcin=string.gsub(calcin,"intocm","")
            if string.match(calcin,notmatch) or string.match(calcin,"[-*^+()#]") then goto recalc end
            glrb=calcin*2.54
            print("="..glrb)
            calcin=input
            goto skipcalcu
        elseif string.match(calcin,"cm>in") and string.match(calcin,match) and not string.match(calcin," ") then
            input=calcin
            calcin=string.gsub(calcin,"cm>in","")
            if string.match(calcin,notmatch) or string.match(calcin,"[-*^+()#]") then goto recalc end
            glrb=calcin/2.54
            print("="..glrb)
            calcin=input
            goto skipcalcu
        elseif string.match(calcin,"ft>m") and string.match(calcin,match) and not string.match(calcin," ") then
            input=calcin
            calcin=string.gsub(calcin,"ft>m","")
            if string.match(calcin,notmatch) or string.match(calcin,"[-*^+()#]") then goto recalc end
            glrb=calcin*3.28
            print("="..glrb)
            calcin=input
            goto skipcalcu
            --end
        elseif string.match(calcin,"sq") and string.match(calcin,match) then calcin=string.gsub(calcin,"sq","^2")
        elseif string.match(calcin,"cu") and string.match(calcin,match) then calcin=string.gsub(calcin,"cu","^3")
        elseif string.match(calcin,"pi") and string.match(calcin,match) then calcin=string.gsub(calcin,"pi",math.pi)
        elseif string.match(calcin,"/0") then goto recalc
        elseif string.match(calcin,"#") and string.match(calcin,match) and prev~=nil then
            calcin = string.gsub(calcin,"#",prev)
        end
    end
end
if string.match(calcin,notmatch) or string.match(calcin,"]") then goto recalc end
if unexpected_condition then goto recalc end
pc,func = pcall(assert,load("return " .. calcin))
if not pc then goto recalc end
glrb = func()
if tostring(glrb)==tostring(calcin) then goto recalc end
if string.match(glrb,"-") then
    print("=("..glrb..")")
else do
        print("="..glrb)
    end
end
::skipcalcu::
prev=glrb
calcin=tostring(calcin)
date=os.date()
if createfiles then
    file=io.open("calculator memory.txt","a+")
    if string.match(glrb,"-") then
        file:write("\n"..date.."\n"..calcin.." = ("..glrb..")\n")
    else do
            file:write("\n"..date.."\n"..calcin.." = "..glrb.."\n")
        end
    end
    file:close()
end
::noprev::
x=x+1 if x==20 and autoclear then os.execute("cls") clearlog()  goto recalc else end
goto recalc