import sys
import urllib2
import commands
import struct
from binascii import unhexlify, crc32

# usage, python script.py address
addr = str(sys.argv[1])

def txdecode(transaction):

    data = urllib2.urlopen("https://blockchain.info/tx/"+transaction+"?show_adv=true")
    dataout = b''
    atoutput = False

    for line in data:
            if 'Output Scripts' in line:
                atoutput = True
            if '</table>' in line:
                atoutput = False
            if atoutput:
                if len(line) > 100:
                    chunks = line.split(' ')
                    for c in chunks:
                        if 'O' not in c and '\n' not in c and '>' not in c and '<' not in c:
                            dataout += unhexlify(c.encode('utf8'))

    length = struct.unpack('<L', dataout[0:4])[0]
    checksum = struct.unpack('<L', dataout[4:8])[0]
    dataout = dataout[8:8+length]

    return dataout

print 'Reading '+addr+"'s transactions..."
offset = 0
startatpage = 0 #17
offset = startatpage*50
data = urllib2.urlopen("https://blockchain.info/address/"+addr+"?offset="+str(offset)+"&filter=0")

pagecalc = offset/50
if pagecalc == 0:
    pagecalc = 1

page = pagecalc
files = 0
keep_reading = True
tx_list = []
f = open('dataout/'+addr+"_tx_list.txt", 'w')

while (keep_reading):
    tx_exist = False

    if keep_reading:
        print 'Page', page, '...'
        data = urllib2.urlopen("https://blockchain.info/address/"+addr+"?offset="+str(offset)+"&filter=0")
    for line in data:
        chunks = line.split('><')
        if 'hash-link' in line:
            tx_exist = True
            ll = chunks[4].split(' ')
            #print 'll', len(ll)
            if len(ll) == 1:
                continue
            #print ll
            #print 'll2', len(ll[2])
            lll = ll[2][10:10+64]

            date1 = ll[4].split('>')[1]
            date2 = ll[5].split('<')[0]
            print date1, date2

            print lll
            f.write(str(lll)+'\n')

            decoded_data = txdecode(str(lll))
            fd = open('dataout/'+str(lll),"wb")
            fd.write(decoded_data)
            fd.close()

            status, output = commands.getstatusoutput("dataout/trid dataout/"+str(lll))
            if 'Unknown!' not in output:

                ff = open('dataout/'+addr+"_file_tx_list.txt", 'a')
                files += 1
                outputlines = output.split('\n')
                for i in range(6,len(outputlines)):
                    print outputlines[i]
                ff.write(str(lll)+' '+outputlines[6]+' '+date1+' '+date2+'\n')
                ff.close()

    page += 1
    offset += 50
    if tx_exist == False:
        keep_reading = False

print len(tx_list), 'transactions found'
print files, 'file headers found'
print 'List saved in file', addr+"_tx_list.txt"
print 'Txs with file headers saved in', addr+"_file_tx_list.txt"
f.close()