#!/usr/bin/env python2
# coding=utf-8
# ^^^^^^^^^^^^ TODO remove when supporting only Python3
# Copyright (c) 2014-2015 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.

from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *

class WalletTest (BitcoinTestFramework):

    def check_fee_amount(self, curr_balance, balance_with_fee, fee_per_byte, tx_size):
        """Return curr_balance after asserting the fee was in range"""
        fee = balance_with_fee - curr_balance
        target_fee = fee_per_byte * tx_size
        if fee < target_fee:
            raise AssertionError("Fee of %s DASH too low! (Should be %s DASH)"%(str(fee), str(target_fee)))
        # allow the node's estimation to be at most 2 bytes off
        if fee > fee_per_byte * (tx_size + 2):
            raise AssertionError("Fee of %s DASH too high! (Should be %s DASH)"%(str(fee), str(target_fee)))
        return curr_balance

    def setup_chain(self):
        print("Initializing test directory "+self.options.tmpdir)
        initialize_chain_clean(self.options.tmpdir, 4)

    def setup_network(self, split=False):
        self.nodes = start_nodes(3, self.options.tmpdir)
        connect_nodes_bi(self.nodes,0,1)
        connect_nodes_bi(self.nodes,1,2)
        connect_nodes_bi(self.nodes,0,2)
        self.is_network_split=False
        self.sync_all()

    def run_test (self):

        # Check that there's no UTXO on none of the nodes
        assert_equal(len(self.nodes[0].listunspent()), 0)
        assert_equal(len(self.nodes[1].listunspent()), 0)
        assert_equal(len(self.nodes[2].listunspent()), 0)

        print "Mining blocks..."

        self.nodes[0].generate(1)

        walletinfo = self.nodes[0].getwalletinfo()
        assert_equal(walletinfo['immature_balance'], 500)
        assert_equal(walletinfo['balance'], 0)

        self.sync_all()
        self.nodes[1].generate(101)
        self.sync_all()

        assert_equal(self.nodes[0].getbalance(), 500)
        assert_equal(self.nodes[1].getbalance(), 500)
        assert_equal(self.nodes[2].getbalance(), 0)

        # Check that only first and second nodes have UTXOs
        assert_equal(len(self.nodes[0].listunspent()), 1)
        assert_equal(len(self.nodes[1].listunspent()), 1)
        assert_equal(len(self.nodes[2].listunspent()), 0)

        # Send 210 DASH from 0 to 2 using sendtoaddress call.
        # Second transaction will be child of first, and will require a fee
        self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 110)
        self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 100)

        walletinfo = self.nodes[0].getwalletinfo()
        assert_equal(walletinfo['immature_balance'], 0)

        # Have node0 mine a block, thus it will collect its own fee.
        self.nodes[0].generate(1)
        self.sync_all()

        # Exercise locking of unspent outputs
        unspent_0 = self.nodes[2].listunspent()[0]
        unspent_0 = {"txid": unspent_0["txid"], "vout": unspent_0["vout"]}
        self.nodes[2].lockunspent(False, [unspent_0])
        assert_raises(JSONRPCException, self.nodes[2].sendtoaddress, self.nodes[2].getnewaddress(), 200)
        assert_equal([unspent_0], self.nodes[2].listlockunspent())
        self.nodes[2].lockunspent(True, [unspent_0])
        assert_equal(len(self.nodes[2].listlockunspent()), 0)

        # Have node1 generate 100 blocks (so node0 can recover the fee)
        self.nodes[1].generate(100)
        self.sync_all()

        # node0 should end up with 1000 DASH in block rewards plus fees, but
        # minus the 210 plus fees sent to node2
        assert_equal(self.nodes[0].getbalance(), 1000-210)
        assert_equal(self.nodes[2].getbalance(), 210)

        # Node0 should have two unspent outputs.
        # Create a couple of transactions to send them to node2, submit them through
        # node1, and make sure both node0 and node2 pick them up properly:
        node0utxos = self.nodes[0].listunspent(1)
        assert_equal(len(node0utxos), 2)

        # create both transactions
        txns_to_send = []
        for utxo in node0utxos:
            inputs = []
            outputs = {}
            inputs.append({ "txid" : utxo["txid"], "vout" : utxo["vout"]})
            outputs[self.nodes[2].getnewaddress("from1")] = utxo["amount"]
            raw_tx = self.nodes[0].createrawtransaction(inputs, outputs)
            txns_to_send.append(self.nodes[0].signrawtransaction(raw_tx))

        # Have node 1 (miner) send the transactions
        self.nodes[1].sendrawtransaction(txns_to_send[0]["hex"], True)
        self.nodes[1].sendrawtransaction(txns_to_send[1]["hex"], True)

        # Have node1 mine a block to confirm transactions:
        self.nodes[1].generate(1)
        self.sync_all()

        assert_equal(self.nodes[0].getbalance(), 0)
        assert_equal(self.nodes[2].getbalance(), 1000)
        assert_equal(self.nodes[2].getbalance("from1"), 1000-210)

        # Send 100 DASH normal
        address = self.nodes[0].getnewaddress("test")
        fee_per_byte = Decimal('0.001') / 1000
        self.nodes[2].settxfee(fee_per_byte * 1000)
        txid = self.nodes[2].sendtoaddress(address, 100, "", "", False)
        self.nodes[2].generate(1)
        self.sync_all()
        node_2_bal = self.check_fee_amount(self.nodes[2].getbalance(), Decimal('900'), fee_per_byte, count_bytes(self.nodes[2].getrawtransaction(txid)))
        assert_equal(self.nodes[0].getbalance(), Decimal('100'))

        # Send 100 DASH with subtract fee from amount
        txid = self.nodes[2].sendtoaddress(address, 100, "", "", True)
        self.nodes[2].generate(1)
        self.sync_all()
        node_2_bal -= Decimal('100')
        assert_equal(self.nodes[2].getbalance(), node_2_bal)
        node_0_bal = self.check_fee_amount(self.nodes[0].getbalance(), Decimal('200'), fee_per_byte, count_bytes(self.nodes[2].getrawtransaction(txid)))

        # Sendmany 100 DASH
        txid = self.nodes[2].sendmany('from1', {address: 100}, 0, "", [])
        self.nodes[2].generate(1)
        self.sync_all()
        node_0_bal += Decimal('100')
        node_2_bal = self.check_fee_amount(self.nodes[2].getbalance(), node_2_bal - Decimal('100'), fee_per_byte, count_bytes(self.nodes[2].getrawtransaction(txid)))
        assert_equal(self.nodes[0].getbalance(), node_0_bal)

        # Sendmany 100 DASH with subtract fee from amount
        txid = self.nodes[2].sendmany('from1', {address: 100}, 0, "", [address])
        self.nodes[2].generate(1)
        self.sync_all()
        node_2_bal -= Decimal('100')
        assert_equal(self.nodes[2].getbalance(), node_2_bal)
        node_0_bal = self.check_fee_amount(self.nodes[0].getbalance(), node_0_bal + Decimal('100'), fee_per_byte, count_bytes(self.nodes[2].getrawtransaction(txid)))

        # Test ResendWalletTransactions:
        # Create a couple of transactions, then start up a fourth
        # node (nodes[3]) and ask nodes[0] to rebroadcast.
        # EXPECT: nodes[3] should have those transactions in its mempool.
        txid1 = self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 1)
        txid2 = self.nodes[1].sendtoaddress(self.nodes[0].getnewaddress(), 1)
        sync_mempools(self.nodes)

        self.nodes.append(start_node(3, self.options.tmpdir))
        connect_nodes_bi(self.nodes, 0, 3)
        sync_blocks(self.nodes)

        relayed = self.nodes[0].resendwallettransactions()
        assert_equal(set(relayed), {txid1, txid2})
        sync_mempools(self.nodes)

        assert(txid1 in self.nodes[3].getrawmempool())

        # Exercise balance rpcs
        assert_equal(self.nodes[0].getwalletinfo()["unconfirmed_balance"], 1)
        assert_equal(self.nodes[0].getunconfirmedbalance(), 1)

        #check if we can list zero value tx as available coins
        #1. create rawtx
        #2. hex-changed one output to 0.0
        #3. sign and send
        #4. check if recipient (node0) can list the zero value tx
        usp = self.nodes[1].listunspent()
        inputs = [{"txid":usp[0]['txid'], "vout":usp[0]['vout']}]
        outputs = {self.nodes[1].getnewaddress(): 499.998, self.nodes[0].getnewaddress(): 11.11}

        rawTx = self.nodes[1].createrawtransaction(inputs, outputs).replace("c0833842", "00000000") #replace 11.11 with 0.0 (int32)
        decRawTx = self.nodes[1].decoderawtransaction(rawTx)
        signedRawTx = self.nodes[1].signrawtransaction(rawTx)
        decRawTx = self.nodes[1].decoderawtransaction(signedRawTx['hex'])
        zeroValueTxid= decRawTx['txid']
        sendResp = self.nodes[1].sendrawtransaction(signedRawTx['hex'])

        self.sync_all()
        self.nodes[1].generate(1) #mine a block
        self.sync_all()

        unspentTxs = self.nodes[0].listunspent() #zero value tx must be in listunspents output
        found = False
        for uTx in unspentTxs:
            if uTx['txid'] == zeroValueTxid:
                found = True
                assert_equal(uTx['amount'], Decimal('0'))
        assert(found)

        #do some -walletbroadcast tests
        stop_nodes(self.nodes)
        wait_bitcoinds()
        self.nodes = start_nodes(3, self.options.tmpdir, [["-walletbroadcast=0"],["-walletbroadcast=0"],["-walletbroadcast=0"]])
        connect_nodes_bi(self.nodes,0,1)
        connect_nodes_bi(self.nodes,1,2)
        connect_nodes_bi(self.nodes,0,2)
        self.sync_all()

        txIdNotBroadcasted  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 2)
        txObjNotBroadcasted = self.nodes[0].gettransaction(txIdNotBroadcasted)
        self.nodes[1].generate(1) #mine a block, tx should not be in there
        self.sync_all()
        assert_equal(self.nodes[2].getbalance(), node_2_bal) #should not be changed because tx was not broadcasted

        #now broadcast from another node, mine a block, sync, and check the balance
        self.nodes[1].sendrawtransaction(txObjNotBroadcasted['hex'])
        self.nodes[1].generate(1)
        self.sync_all()
        node_2_bal += 2
        txObjNotBroadcasted = self.nodes[0].gettransaction(txIdNotBroadcasted)
        assert_equal(self.nodes[2].getbalance(), node_2_bal)

        #create another tx
        txIdNotBroadcasted  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 2)

        #restart the nodes with -walletbroadcast=1
        stop_nodes(self.nodes)
        wait_bitcoinds()
        self.nodes = start_nodes(3, self.options.tmpdir)
        connect_nodes_bi(self.nodes,0,1)
        connect_nodes_bi(self.nodes,1,2)
        connect_nodes_bi(self.nodes,0,2)
        sync_blocks(self.nodes)

        self.nodes[0].generate(1)
        sync_blocks(self.nodes)
        node_2_bal += 2

        #tx should be added to balance because after restarting the nodes tx should be broadcastet
        assert_equal(self.nodes[2].getbalance(), node_2_bal)

        #send a tx with value in a string (PR#6380 +)
        txId  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "2")
        txObj = self.nodes[0].gettransaction(txId)
        assert_equal(txObj['amount'], Decimal('-2'))

        txId  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "0.0001")
        txObj = self.nodes[0].gettransaction(txId)
        assert_equal(txObj['amount'], Decimal('-0.0001'))

        #check if JSON parser can handle scientific notation in strings
        txId  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "1e-4")
        txObj = self.nodes[0].gettransaction(txId)
        assert_equal(txObj['amount'], Decimal('-0.0001'))

        try:
            txId  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "1f-4")
        except JSONRPCException as e:
            assert("Invalid amount" in e.error['message'])
        else:
            raise AssertionError("Must not parse invalid amounts")


        try:
            self.nodes[0].generate("2")
            raise AssertionError("Must not accept strings as numeric")
        except JSONRPCException as e:
            assert("not an integer" in e.error['message'])

        # Import address and private key to check correct behavior of spendable unspents
        # 1. Send some coins to generate new UTXO
        address_to_import = self.nodes[2].getnewaddress()
        txid = self.nodes[0].sendtoaddress(address_to_import, 1)
        self.nodes[0].generate(1)
        self.sync_all()

        # 2. Import address from node2 to node1
        self.nodes[1].importaddress(address_to_import)

        # 3. Validate that the imported address is watch-only on node1
        assert(self.nodes[1].validateaddress(address_to_import)["iswatchonly"])

        # 4. Check that the unspents after import are not spendable
        assert_array_result(self.nodes[1].listunspent(),
                           {"address": address_to_import},
                           {"spendable": False})

        # 5. Import private key of the previously imported address on node1
        priv_key = self.nodes[2].dumpprivkey(address_to_import)
        self.nodes[1].importprivkey(priv_key)

        # 6. Check that the unspents are now spendable on node1
        assert_array_result(self.nodes[1].listunspent(),
                           {"address": address_to_import},
                           {"spendable": True})

        #check if wallet or blochchain maintenance changes the balance
        self.sync_all()
        blocks = self.nodes[0].generate(2)
        self.sync_all()
        balance_nodes = [self.nodes[i].getbalance() for i in range(3)]
        block_count = self.nodes[0].getblockcount()

        # Check modes:
        #   - True: unicode escaped as \u....
        #   - False: unicode directly as UTF-8
        for mode in [True, False]:
            self.nodes[0].ensure_ascii = mode
            # unicode check: Basic Multilingual Plane, Supplementary Plane respectively
            for s in [u'рыба', u'𝅘𝅥𝅯']:
                addr = self.nodes[0].getaccountaddress(s)
                label = self.nodes[0].getaccount(addr)
                assert_equal(label.encode('utf-8'), s.encode('utf-8')) # TODO remove encode(...) when supporting only Python3
                assert(s in self.nodes[0].listaccounts().keys())
        self.nodes[0].ensure_ascii = True # restore to default

        # maintenance tests
        maintenance = [
            '-rescan',
            '-reindex',
            '-zapwallettxes=1',
            '-zapwallettxes=2',
            '-salvagewallet',
        ]
        for m in maintenance:
            print "check " + m
            stop_nodes(self.nodes)
            wait_bitcoinds()
            self.nodes = start_nodes(3, self.options.tmpdir, [[m]] * 3)
            while m == '-reindex' and [block_count] * 3 != [self.nodes[i].getblockcount() for i in range(3)]:
                # reindex will leave rpc warm up "early"; Wait for it to finish
                time.sleep(0.1)
            assert_equal(balance_nodes, [self.nodes[i].getbalance() for i in range(3)])

        # Exercise listsinceblock with the last two blocks
        coinbase_tx_1 = self.nodes[0].listsinceblock(blocks[0])
        assert_equal(coinbase_tx_1["lastblock"], blocks[1])
        assert_equal(len(coinbase_tx_1["transactions"]), 1)
        assert_equal(coinbase_tx_1["transactions"][0]["blockhash"], blocks[1])
        assert_equal(len(self.nodes[0].listsinceblock(blocks[1])["transactions"]), 0)

if __name__ == '__main__':
    WalletTest ().main ()
