#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2011 thomasv@gitorious
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

import re, sys, getpass

try:
    import ecdsa  
except:
    print "python-ecdsa does not seem to be installed. Try 'sudo pip install ecdsa'"
    sys.exit(1)

try:
    import aes
except:
    print "AES does not seem to be installed. Try 'sudo pip install slowaes'"
    sys.exit(1)


import electrum
from optparse import OptionParser
from decimal import Decimal

from electrum import Wallet, WalletSynchronizer, format_satoshis

known_commands = ['help', 'validateaddress', 'balance', 'contacts', 'create', 'restore', 'payto', 'sendtx', 'password', 'addresses', 'history', 'label', 'mktx','seed','import','signmessage','verifymessage','eval','deseed','reseed']
offline_commands = ['password', 'mktx', 'label', 'contacts', 'help', 'validateaddress', 'signmessage', 'verifymessage', 'eval', 'create', 'addresses', 'import', 'seed','deseed','reseed']
protected_commands = ['payto', 'password', 'mktx', 'seed', 'import','signmessage' ]

if __name__ == '__main__':

    usage = "usage: %prog [options] command\nCommands: "+ (', '.join(known_commands))
    parser = OptionParser(usage=usage)
    parser.add_option("-g", "--gui", dest="gui", default="qt", help="gui")
    parser.add_option("-w", "--wallet", dest="wallet_path", help="wallet path (default: electrum.dat)")
    parser.add_option("-o", "--offline", action="store_true", dest="offline", default=False, help="remain offline")
    parser.add_option("-a", "--all", action="store_true", dest="show_all", default=False, help="show all addresses")
    parser.add_option("-b", "--balance", action="store_true", dest="show_balance", default=False, help="show the balance at listed addresses")
    parser.add_option("-k", "--keys",action="store_true", dest="show_keys",default=False, help="show the private keys of listed addresses")
    parser.add_option("-f", "--fee", dest="tx_fee", default="0.005", help="set tx fee")
    parser.add_option("-s", "--fromaddr", dest="from_addr", default=None, help="set source address for payto/mktx. if it isn't in the wallet, it will ask for the private key unless supplied in the format public_key:private_key. It's not saved in the wallet.")
    parser.add_option("-c", "--changeaddr", dest="change_addr", default=None, help="set the change address for payto/mktx. default is a spare address, or the source address if it's not in the wallet")
    parser.add_option("-r", "--remote", dest="remote_url", default=None, help="URL of a remote wallet")
    options, args = parser.parse_args()

    wallet = Wallet()
    wallet.set_path(options.wallet_path)
    wallet.read()
    wallet.remote_url = options.remote_url

    if len(args)==0:
        url = None
        cmd = 'gui'
    elif len(args)==1 and re.match('^bitcoin:', args[0]):
        url = args[0]
        cmd = 'gui'
    else:
        cmd = args[0]
        firstarg = args[1] if len(args) > 1 else ''
        
    if cmd == 'gui':
        if options.gui=='gtk':
            import electrum.gui as gui
        elif options.gui=='qt':
            import electrum.gui_qt as gui
        else:
            print "unknown gui", options.gui
            exit(1)

        gui = gui.ElectrumGui(wallet)
        WalletSynchronizer(wallet,True).start()

        try:
            found = wallet.file_exists
            if not found:
                found = gui.restore_or_create()
        except SystemExit, e:
            exit(e)
        except BaseException, e:
            import traceback
            traceback.print_exc(file=sys.stdout)
            #gui.show_message(e.message)
            exit(1)

        if not found: exit(1)
        gui.main(url)
        wallet.save()
        sys.exit(0)

    if cmd not in known_commands:
        cmd = 'help'

    if not wallet.file_exists and cmd not in ['help','create','restore']:
        print "Wallet file not found."
        print "Type 'electrum create' to create a new wallet, or provide a path to a wallet with the -w option"
        sys.exit(0)
    
    if cmd in ['create', 'restore']:
        from electrum import mnemonic
        if wallet.file_exists:
            print "remove the existing wallet first!"
            sys.exit(0)
        password = getpass.getpass("Password (hit return if you do not wish to encrypt your wallet):")
        if password:
            password2 = getpass.getpass("Confirm password:")
            if password != password2:
                print "error"
                sys.exit(1)
        else:
            password = None

        w_host, w_port, w_protocol = wallet.server.split(':')
        host = raw_input("server (default:%s):"%w_host)
        port = raw_input("port (default:%s):"%w_port)
        protocol = raw_input("protocol [t=tcp;h=http;n=native] (default:%s):"%w_protocol)
        fee = raw_input("fee (default:%s):"%( str(Decimal(wallet.fee)/100000000)) )
        gap = raw_input("gap limit (default 5):")
        if host: w_host = host
        if port: w_port = port
        if protocol: w_protocol = protocol
        wallet.server = w_host + ':' + w_port + ':' +w_protocol
        if fee: wallet.fee = float(fee)
        if gap: wallet.gap_limit = int(gap)

        if cmd == 'restore':
            seed = raw_input("seed:")
            try:
                seed.decode('hex')
            except:
                print "not hex, trying decode"
                seed = mnemonic.mn_decode( seed.split(' ') )
            if not seed:
                print "no seed"
                sys.exit(1)

            wallet.seed = str(seed)
            wallet.init_mpk( wallet.seed )
            if not options.offline:
                WalletSynchronizer(wallet).start()
                print "recovering wallet..."
                wallet.up_to_date_event.clear()
                wallet.up_to_date = False
                wallet.update()
                if wallet.is_found():
                    print "recovery successful"
                else:
                    print "found no history for this wallet"
            wallet.fill_addressbook()
            wallet.save()
            print "Wallet saved in '%s'"%wallet.path
        else:
            wallet.new_seed(None)
            wallet.init_mpk( wallet.seed )
            wallet.synchronize() # there is no wallet thread 
            wallet.save()
            print "Your wallet generation seed is: " + wallet.seed
            print "Please keep it in a safe place; if you lose it, you will not be able to restore your wallet."
            print "Equivalently, your wallet seed can be stored and recovered with the following mnemonic code:"
            print "\""+' '.join(mnemonic.mn_encode(wallet.seed))+"\""
            print "Wallet saved in '%s'"%wallet.path
            
        if password:
            wallet.update_password(wallet.seed, None, password)

    # check syntax
    if cmd in ['payto', 'mktx']:
        try:
            to_address = args[1]
            amount = int( 100000000 * Decimal(args[2]) )
            change_addr = None
            label = ' '.join(args[3:])
            if options.tx_fee: 
                options.tx_fee = int( 100000000 * Decimal(options.tx_fee) )
        except:
            firstarg = cmd
            cmd = 'help'

    # open session
    if cmd not in offline_commands and not options.offline:
        WalletSynchronizer(wallet).start()
        wallet.update()
        wallet.save()

    # check if --from_addr not in wallet (for mktx/payto)
    is_temporary = False
    from_addr = None
    if options.from_addr:
        from_addr = options.from_addr
        if from_addr not in wallet.all_addresses():
            is_temporary = True
                
    # commands needing password
    if cmd in protected_commands or ( cmd=='addresses' and options.show_keys):
        password = getpass.getpass('Password:') if wallet.use_encryption and not is_temporary else None
        # check password
        try:
            wallet.pw_decode( wallet.seed, password)
        except:
            print "invalid password"
            exit(1)

    if cmd == 'import':
        keypair = args[1]
        try:
            wallet.import_key(keypair,password)
            wallet.save()
            print "keypair imported"
        except BaseException, e:
            print( 'Error:' + str(e) )

    if cmd=='help':
        cmd2 = firstarg
        if cmd2 not in known_commands:
            print "type 'electrum help <command>' to see the help for a specific command"
            print "type 'electrum --help' to see the list of options"
            print "list of commands:", ', '.join(known_commands)
        elif cmd2 == 'balance':
            print "Display the balance of your wallet or of an address."
            print "syntax: balance [<address>]"
        elif cmd2 == 'contacts':
            print "show your list of contacts"
        elif cmd2 == 'payto':
            print "payto <recipient> <amount> [label]"
            print "create and broadcast a transaction."
            print "<recipient> can be a bitcoin address or a label"
            print "options:\n--fee, -f: set transaction fee\n--fromaddr, -s: send from address -\n--changeaddr, -c: send change to address"
        elif cmd2== 'sendtx':
            print "sendtx <tx>"
            print "broadcast a transaction to the network. <tx> must be in hexadecimal"
        elif cmd2 == 'password':
            print "change your password"
        elif cmd2 == 'addresses':
            print "show your list of addresses."
            print "options:\n -a: show all addresses, including change addresses\n-k: show private keys\n-b: show the balance of addresses"
        elif cmd2 == 'history':
            print "show the transaction history"
        elif cmd2 == 'label':
            print "assign a label to an item"
        elif cmd2 == 'gtk':
            print "start the GUI"
        elif cmd2 == 'mktx':
            print "create a signed transaction. password protected"
            print "syntax: mktx <recipient> <amount> [label]"
            print "options:\n--fee, -f: set transaction fee\n--fromaddr, -s: send from address -\n--changeaddr, -c: send change to address"
        elif cmd2 == 'seed':
            print "print the generation seed of your wallet."
        elif cmd2 == 'deseed':
            print "remove seed from the wallet. The seed is stored in a file that has the name of the wallet plus '.seed'"
        elif cmd2 == 'reseed':
            print "restore seed of the wallet. The wallet must have no seed, and the seed must match the wallet's master public key."
        elif cmd2 == 'eval':
            print "Run python eval() on an object\nSyntax: eval <expression>\nExample: eval \"wallet.aliases\""

    elif cmd == 'seed':
        from electrum import mnemonic
        seed = wallet.pw_decode( wallet.seed, password)
        print seed + ' "' + ' '.join(mnemonic.mn_encode(seed)) + '"'

    elif cmd == 'deseed':
        if not wallet.seed:
            print "Error: This wallet has no seed"
        elif wallet.use_encryption:
            print "Error: This wallet is encrypted"
        else:
            ns = wallet.path + '.seed'
            print "Warning: you are going to extract the seed from '%s'\nThe seed will be saved in '%s'"%(wallet.path,ns)
            if raw_input("Are you sure you want to continue? (y/n) ") in ['y','Y','yes']:
                f = open(ns,'w')
                f.write(repr({'seed':wallet.seed, 'imported_keys':wallet.imported_keys})+"\n")
                f.close()
                wallet.seed = ''
                for k in wallet.imported_keys.keys(): wallet.imported_keys[k] = ''
                wallet.save()
                print "Done."
            else:
                print "Action canceled."

    elif cmd == 'reseed':
        if wallet.seed:
            print "This wallet already has a seed", wallet.seed
        else:
            ns = wallet.path + '.seed'
            try:
                f = open(ns,'r')
                data = f.read()
                f.close()
            except:
                print "seed file not found"
                sys.exit()
            try:
                import ast
                d = ast.literal_eval( data )
                seed = d['seed']
                imported_keys = d.get('imported_keys',{})
            except:
                print "error with seed file"
                sys.exit(1)

            mpk = wallet.master_public_key
            wallet.seed = seed
            wallet.imported_keys = imported_keys
            wallet.use_encryption = False
            wallet.init_mpk(seed)
            if mpk == wallet.master_public_key:
                wallet.save()
                print "Done: " + wallet.path
            else:
                print "error: master public key does not match"

    elif cmd == 'validateaddress':
        addr = args[1]
        print wallet.is_valid(addr)

    elif cmd == 'balance':
        try:
            addrs = args[1:]
        except:
            pass
        if addrs == []:
            c, u = wallet.get_balance()
            if u:
                print Decimal( c ) / 100000000 , Decimal( u ) / 100000000
            else:
                print Decimal( c ) / 100000000
        else:
            for addr in addrs:
                c, u = wallet.get_addr_balance(addr)
                if u:
                    print "%s %s, %s" % (addr, str(Decimal(c)/100000000), str(Decimal(u)/100000000))
                else:
                    print "%s %s" % (addr, str(Decimal(c)/100000000))

    elif cmd in [ 'contacts']:
        for addr in wallet.addressbook:
            print addr, "   ", wallet.labels.get(addr)

    elif cmd == 'eval':
        print eval(args[1])
        wallet.save()

    elif cmd in [ 'addresses']:
        for addr in wallet.all_addresses():
            if options.show_all or not wallet.is_change(addr):
                label = wallet.labels.get(addr)
                _type = ''
                if wallet.is_change(addr): _type = "[change]"
                if addr in wallet.imported_keys.keys(): _type = "[imported]"
                if label is None: label = ''
                if options.show_balance:
                    h = wallet.history.get(addr,[])
                    ni = no = 0
                    for item in h:
                        if item['is_input']:  ni += 1
                        else:              no += 1
                    b = "%d %d %s"%(no, ni, str(Decimal(wallet.get_addr_balance(addr)[0])/100000000))
                else: b=''
                if options.show_keys:
                    addr += ':' + str(wallet.get_private_key_base58(addr, password))
                print addr, b, _type, label

    if cmd == 'history':
        lines = wallet.get_tx_history()
        b = 0 
        for line in lines:
            import datetime
            v = line['value'] 
            b += v
            try:
                time_str = str( datetime.datetime.fromtimestamp( line['timestamp']))
            except:
                print line['timestamp']
                time_str = 'pending'
            label = line.get('label')
            if not label: label = line['tx_hash']
            else: label = label + ' '*(64 - len(label) )

            print time_str , "  " + label + "  " + format_satoshis(v)+ "  "+ format_satoshis(b)
        print "# balance: ", format_satoshis(b)

    elif cmd == 'label':
        try:
            tx = args[1]
            label = ' '.join(args[2:])
        except:
            print "syntax:  label <tx_hash> <text>"
            sys.exit(1)
        wallet.labels[tx] = label
        wallet.save()
            
    elif cmd in ['payto', 'mktx']:
        if from_addr and is_temporary:
            if from_addr.find(":") == -1:
                keypair = from_addr + ":" + getpass.getpass('Private key:')
            else:
                keypair = from_addr
                from_addr = keypair.split(':')[0]
            if not wallet.import_key(keypair,password):
                print "invalid key pair"
                exit(1)
            wallet.history[from_addr] = interface.retrieve_history(from_addr)
            wallet.update_tx_history()
            change_addr = from_addr

        if options.change_addr:
            change_addr = options.change_addr

        for k, v in wallet.labels.items():
            if v == to_address:
                to_address = k
                print "alias", to_address
                break
            if change_addr and v == change_addr:
                change_addr = k
        try:
            tx = wallet.mktx( to_address, amount, label, password,
                fee = options.tx_fee, change_addr = change_addr, from_addr = from_addr )
        except:
            import traceback
            traceback.print_exc(file=sys.stdout)
            tx = None

        if tx and cmd=='payto': 
            r, h = wallet.sendtx( tx )
            print h
        else:
            print tx

        if is_temporary:
            wallet.imported_keys.pop(from_addr)
            del(wallet.history[from_addr])
        wallet.save()

    elif cmd == 'sendtx':
        tx = args[1]
        r, h = wallet.sendtx( tx )
        print h

    elif cmd == 'password':
        try:
            seed = wallet.pw_decode( wallet.seed, password)
        except:
            print "sorry"
            sys.exit(1)
        new_password = getpass.getpass('New password:')
        if new_password == getpass.getpass('Confirm new password:'):
            wallet.update_password(seed, password, new_password)
        else:
            print "error: mismatch"

    elif cmd == 'signmessage':
        address, message = args[1:3]
        print wallet.sign_message(address, message, password)

    elif cmd == 'verifymessage':
        address, signature, message = args[1:4]
        try:
            wallet.verify_message(address, signature, message)
            print True
        except:
            print False