from __future__ import print_function
from __future__ import absolute_import

# System modules
import os
import sys

# Third-party modules
import pexpect

# LLDB Modules
import lldb
from .lldbtest import *
from . import lldbutil

class PExpectTest(TestBase):
    
    mydir = TestBase.compute_mydir(__file__)

    def setUp(self):
        TestBase.setUp(self)

    def launchArgs(self):
        pass

    def launch(self, timeout=None):
        if timeout is None: timeout = 30
        logfile = sys.stdout if self.TraceOn() else None
        self.child = pexpect.spawn('%s %s' % (lldbtest_config.lldbExec, self.launchArgs()), logfile=logfile)
        self.child.timeout = timeout
        self.timeout = timeout

    def expect(self, patterns=None, timeout=None, exact=None):
        if patterns is None: return None
        if timeout is None: timeout = self.timeout
        if exact is None: exact = False
        if exact:
            return self.child.expect_exact(patterns, timeout=timeout)
        else:
            return self.child.expect(patterns, timeout=timeout)

    def expectall(self, patterns=None, timeout=None, exact=None):
        if patterns is None: return None
        if timeout is None: timeout = self.timeout
        if exact is None: exact = False
        for pattern in patterns:
            self.expect(pattern, timeout=timeout, exact=exact)

    def sendimpl(self, sender, command, patterns=None, timeout=None, exact=None):
        sender(command)
        return self.expect(patterns=patterns, timeout=timeout, exact=exact)

    def send(self, command, patterns=None, timeout=None, exact=None):
        return self.sendimpl(self.child.send, command, patterns, timeout, exact)

    def sendline(self, command, patterns=None, timeout=None, exact=None):
        return self.sendimpl(self.child.sendline, command, patterns, timeout, exact)

    def quit(self, gracefully=None):
        if gracefully is None: gracefully = True
        self.child.sendeof()
        self.child.close(force=not gracefully)
        self.child = None
