#!/usr/bin/env python3
# Copyright (c) 2014-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.

"""
Run Regression Test Suite

This module calls down into individual test cases via subprocess. It will
forward all unrecognized arguments onto the individual test scripts, other
than:

    - `-extended`: run the "extended" test suite in addition to the basic one.
    - `-win`: signal that this is running in a Windows environment, and we
      should run the tests.
    - `--coverage`: this generates a basic coverage report for the RPC
      interface.

For a description of arguments recognized by test scripts, see
`qa/pull-tester/test_framework/test_framework.py:BitcoinTestFramework.main`.

"""

import os
import time
import shutil
import sys
import subprocess
import tempfile
import re

from tests_config import *

BOLD = ("","")
if os.name == 'posix':
    # primitive formatting on supported
    # terminal via ANSI escape sequences:
    BOLD = ('\033[0m', '\033[1m')

RPC_TESTS_DIR = BUILDDIR + '/qa/rpc-tests/'

#If imported values are not defined then set to zero (or disabled)
if 'ENABLE_WALLET' not in vars():
    ENABLE_WALLET=0
if 'ENABLE_BITCOIND' not in vars():
    ENABLE_BITCOIND=0
if 'ENABLE_UTILS' not in vars():
    ENABLE_UTILS=0
if 'ENABLE_ZMQ' not in vars():
    ENABLE_ZMQ=0

ENABLE_COVERAGE=0

#Create a set to store arguments and create the passon string
opts = set()
passon_args = ""
PASSON_REGEX = re.compile("^--")

print_help = False

for arg in sys.argv[1:]:
    if arg == "--help" or arg == "-h" or arg == "-?":
        print_help = True
        break
    if arg == '--coverage':
        ENABLE_COVERAGE = 1
    elif PASSON_REGEX.match(arg):
        passon_args += " " + arg
    else:
        opts.add(arg)

#Set env vars
if "BITCOIND" not in os.environ:
    os.environ["BITCOIND"] = BUILDDIR + '/src/bitcoind' + EXEEXT
if "BITCOINCLI" not in os.environ:
    os.environ["BITCOINCLI"] = BUILDDIR + '/src/bitcoin-cli' + EXEEXT

if EXEEXT == ".exe" and "-win" not in opts:
    # https://github.com/bitcoin/bitcoin/commit/d52802551752140cf41f0d9a225a43e84404d3e9
    # https://github.com/bitcoin/bitcoin/pull/5677#issuecomment-136646964
    print("Win tests currently disabled by default.  Use -win option to enable")
    sys.exit(0)

if not (ENABLE_WALLET == 1 and ENABLE_UTILS == 1 and ENABLE_BITCOIND == 1):
    print("No rpc tests to run. Wallet, utils, and bitcoind must all be enabled")
    sys.exit(0)

# python3-zmq may not be installed. Handle this gracefully and with some helpful info
if ENABLE_ZMQ:
    try:
        import zmq
    except ImportError as e:
        print("ERROR: \"import zmq\" failed. Set ENABLE_ZMQ=0 or " \
            "to run zmq tests, see dependency info in /qa/README.md.")
        raise e

#Tests
testScripts = [
    'bip68-112-113-p2p.py',
    'wallet.py',
    'listtransactions.py',
    'receivedby.py',
    'mempool_resurrect_test.py',
    'txn_doublespend.py --mineblock',
    'txn_clone.py',
    'getchaintips.py',
    'rawtransactions.py',
    'rest.py',
    'mempool_spendcoinbase.py',
    'mempool_reorg.py',
    'mempool_limit.py',
    'httpbasics.py',
    'multi_rpc.py',
    'zapwallettxes.py',
    'proxy_test.py',
    'merkle_blocks.py',
    'fundrawtransaction.py',
    'signrawtransactions.py',
    'walletbackup.py',
    'nodehandling.py',
    'reindex.py',
    'decodescript.py',
    'p2p-fullblocktest.py',
    'blockchain.py',
    'disablewallet.py',
    'sendheaders.py',
    'keypool.py',
    'prioritise_transaction.py',
    'invalidblockrequest.py',
    'invalidtxrequest.py',
    'abandonconflict.py',
    'p2p-versionbits-warning.py',
    'importprunedfunds.py',
    'signmessages.py'
]
if ENABLE_ZMQ:
    testScripts.append('zmq_test.py')

testScriptsExt = [
    'bip9-softforks.py',
    'bip65-cltv.py',
    'bip65-cltv-p2p.py',
    'bip68-sequence.py',
    'bipdersig-p2p.py',
    'bipdersig.py',
    'getblocktemplate_longpoll.py',
    'getblocktemplate_proposals.py',
    'txn_doublespend.py',
    'txn_clone.py --mineblock',
    'forknotify.py',
    'invalidateblock.py',
#    'rpcbind_test.py', #temporary, bug in libevent, see #6655
    'smartfees.py',
    'maxblocksinflight.py',
    'p2p-acceptblock.py',
    'mempool_packages.py',
    'maxuploadtarget.py',
    'replace-by-fee.py',
    'p2p-feefilter.py',
    'pruning.py', # leave pruning last as it takes a REALLY long time
]

def runtests():
    test_list = []
    if '-extended' in opts:
        test_list = testScripts + testScriptsExt
    elif len(opts) == 0 or (len(opts) == 1 and "-win" in opts):
        test_list = testScripts
    else:
        for t in testScripts + testScriptsExt:
            if t in opts or re.sub(".py$", "", t) in opts:
                test_list.append(t)

    if print_help:
        # Only print help of the first script and exit
        subprocess.check_call(RPC_TESTS_DIR + test_list[0] + ' -h', shell=True)
        sys.exit(0)

    coverage = None

    if ENABLE_COVERAGE:
        coverage = RPCCoverage()
        print("Initializing coverage directory at %s\n" % coverage.dir)
    flags = " --srcdir %s/src %s %s" % (BUILDDIR, coverage.flag if coverage else '', passon_args)

    #Run Tests
    for t in test_list:
            print("Running testscript %s%s%s ..." % (BOLD[1], t, BOLD[0]))
            time0 = time.time()
            subprocess.check_call(
                RPC_TESTS_DIR + t + flags, shell=True)
            print("Duration: %s s\n" % (int(time.time() - time0)))

    if coverage:
        coverage.report_rpc_coverage()

        print("Cleaning up coverage data")
        coverage.cleanup()


class RPCCoverage(object):
    """
    Coverage reporting utilities for pull-tester.

    Coverage calculation works by having each test script subprocess write
    coverage files into a particular directory. These files contain the RPC
    commands invoked during testing, as well as a complete listing of RPC
    commands per `bitcoin-cli help` (`rpc_interface.txt`).

    After all tests complete, the commands run are combined and diff'd against
    the complete list to calculate uncovered RPC commands.

    See also: qa/rpc-tests/test_framework/coverage.py

    """
    def __init__(self):
        self.dir = tempfile.mkdtemp(prefix="coverage")
        self.flag = '--coveragedir %s' % self.dir

    def report_rpc_coverage(self):
        """
        Print out RPC commands that were unexercised by tests.

        """
        uncovered = self._get_uncovered_rpc_commands()

        if uncovered:
            print("Uncovered RPC commands:")
            print("".join(("  - %s\n" % i) for i in sorted(uncovered)))
        else:
            print("All RPC commands covered.")

    def cleanup(self):
        return shutil.rmtree(self.dir)

    def _get_uncovered_rpc_commands(self):
        """
        Return a set of currently untested RPC commands.

        """
        # This is shared from `qa/rpc-tests/test-framework/coverage.py`
        REFERENCE_FILENAME = 'rpc_interface.txt'
        COVERAGE_FILE_PREFIX = 'coverage.'

        coverage_ref_filename = os.path.join(self.dir, REFERENCE_FILENAME)
        coverage_filenames = set()
        all_cmds = set()
        covered_cmds = set()

        if not os.path.isfile(coverage_ref_filename):
            raise RuntimeError("No coverage reference found")

        with open(coverage_ref_filename, 'r') as f:
            all_cmds.update([i.strip() for i in f.readlines()])

        for root, dirs, files in os.walk(self.dir):
            for filename in files:
                if filename.startswith(COVERAGE_FILE_PREFIX):
                    coverage_filenames.add(os.path.join(root, filename))

        for filename in coverage_filenames:
            with open(filename, 'r') as f:
                covered_cmds.update([i.strip() for i in f.readlines()])

        return all_cmds - covered_cmds


if __name__ == '__main__':
    runtests()