"""
Test lldb Python commands.
"""


import sys
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *


class CmdPythonTestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)
    NO_DEBUG_INFO_TESTCASE = True

    def test(self):
        self.build()
        self.pycmd_tests()

    def pycmd_tests(self):
        self.runCmd("command source py_import")

        # Test a bunch of different kinds of python callables with
        # both 4 and 5 positional arguments.
        self.expect("foobar", substrs=["All good"])
        self.expect("foobar4", substrs=["All good"])
        self.expect("vfoobar", substrs=["All good"])
        self.expect("v5foobar", substrs=["All good"])
        self.expect("sfoobar", substrs=["All good"])
        self.expect("cfoobar", substrs=["All good"])
        self.expect("ifoobar", substrs=["All good"])
        self.expect("sfoobar4", substrs=["All good"])
        self.expect("cfoobar4", substrs=["All good"])
        self.expect("ifoobar4", substrs=["All good"])
        self.expect("ofoobar", substrs=["All good"])
        self.expect("ofoobar4", substrs=["All good"])

        # Verify command that specifies eCommandRequiresTarget returns failure
        # without a target.
        self.expect('targetname',
                    substrs=['a.out'], matching=False, error=True)

        exe = self.getBuildArtifact("a.out")
        self.expect("file " + exe,
                    patterns=["Current executable set to .*a.out"])

        self.expect('targetname',
                    substrs=['a.out'], matching=True, error=False)

        # This is the function to remove the custom commands in order to have a
        # clean slate for the next test case.
        def cleanup():
            self.runCmd('command script delete welcome', check=False)
            self.runCmd('command script delete targetname', check=False)
            self.runCmd('command script delete longwait', check=False)
            self.runCmd('command script delete mysto', check=False)
            self.runCmd('command script delete tell_sync', check=False)
            self.runCmd('command script delete tell_async', check=False)
            self.runCmd('command script delete tell_curr', check=False)
            self.runCmd('command script delete bug11569', check=False)
            self.runCmd('command script delete takes_exe_ctx', check=False)
            self.runCmd('command script delete decorated', check=False)

        # Execute the cleanup function during test case tear down.
        self.addTearDownHook(cleanup)

        # Interact with debugger in synchronous mode
        self.setAsync(False)

        # We don't want to display the stdout if not in TraceOn() mode.
        if not self.TraceOn():
            self.HideStdout()

        self.expect('welcome Enrico',
                    substrs=['Hello Enrico, welcome to LLDB'])

        self.expect("help welcome",
                    substrs=['Just a docstring for welcome_impl',
                             'A command that says hello to LLDB users'])

        decorated_commands = ["decorated" + str(n) for n in range(1, 5)]
        for name in decorated_commands:
            self.expect(name, substrs=["hello from " + name])
            self.expect("help " + name,
                        substrs=["Python command defined by @lldb.command"])

        self.expect("help",
                    substrs=['For more information run']
                             + decorated_commands + ['welcome'])

        self.expect("help -a",
                    substrs=['For more information run']
                             + decorated_commands + ['welcome'])

        self.expect("help -u", matching=False,
                    substrs=['For more information run'])

        self.runCmd("command script delete welcome")

        self.expect('welcome Enrico', matching=False, error=True,
                    substrs=['Hello Enrico, welcome to LLDB'])

        self.expect('targetname fail', error=True,
                    substrs=['a test for error in command'])

        self.expect('command script list',
                    substrs=['targetname',
                             'For more information run'])

        self.expect("help targetname",
                    substrs=['Expects', '\'raw\'', 'input',
                             'help', 'raw-input'])

        self.expect("longwait",
                    substrs=['Done; if you saw the delays I am doing OK'])

        self.runCmd("b main")
        self.runCmd("run")
        self.runCmd("mysto 3")
        self.expect("frame variable array",
                    substrs=['[0] = 79630', '[1] = 388785018', '[2] = 0'])
        self.runCmd("mysto 3")
        self.expect("frame variable array",
                    substrs=['[0] = 79630', '[4] = 388785018', '[5] = 0'])

# we cannot use the stepover command to check for async execution mode since LLDB
# seems to get confused when events start to queue up
        self.expect("tell_sync",
                    substrs=['running sync'])
        self.expect("tell_async",
                    substrs=['running async'])
        self.expect("tell_curr",
                    substrs=['I am running sync'])

# check that the execution context is passed in to commands that ask for it
        self.expect("takes_exe_ctx", substrs=["a.out"])

        # Test that a python command can redefine itself
        self.expect('command script add -f foobar welcome -h "just some help"')

        self.runCmd("command script clear")

        # Test that re-defining an existing command works
        self.runCmd(
            'command script add my_command --class welcome.WelcomeCommand')
        self.expect('my_command Blah', substrs=['Hello Blah, welcome to LLDB'])

        self.runCmd(
            'command script add my_command -o --class welcome.TargetnameCommand')
        self.expect('my_command', substrs=['a.out'])

        self.runCmd("command script clear")

        self.expect('command script list', matching=False,
                    substrs=['targetname',
                             'longwait'])

        self.expect('command script add -f foobar frame', error=True,
                    substrs=['cannot add command'])

        # http://llvm.org/bugs/show_bug.cgi?id=11569
        # LLDBSwigPythonCallCommand crashes when a command script returns an
        # object
        self.runCmd('command script add -f bug11569 bug11569')
        # This should not crash.
        self.runCmd('bug11569', check=False)

    def test_persistence(self):
        """
        Ensure that function arguments meaningfully persist (and do not crash!)
        even after the function terminates.
        """
        self.runCmd("command script import persistence.py")
        self.runCmd("command script add -f persistence.save_debugger save_debugger")
        self.expect("save_debugger", substrs=[str(self.dbg)])

        # After the command completes, the debugger object should still be
        # valid.
        self.expect("script str(persistence.debugger_copy)", substrs=[str(self.dbg)])
        # The result object will be replaced by an empty result object (in the
        # "Started" state).
        self.expect("script str(persistence.result_copy)", substrs=["Started"])
