# Copyright (C) 2011 Google Inc. All rights reserved.
#
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# modification, are permitted provided that the following conditions are
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# notice, this list of conditions and the following disclaimer.
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# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
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# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
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import os

from webkitpy.common.system.deprecated_logging import log
from webkitpy.common.system.executive import ScriptError


class MockProcess(object):
    def __init__(self):
        self.pid = 42


# FIXME: This should be unified with MockExecutive2
class MockExecutive(object):
    PIPE = "MOCK PIPE"
    STDOUT = "MOCK STDOUT"

    @staticmethod
    def ignore_error(error):
        pass

    def __init__(self, should_log=False, should_throw=False, should_throw_when_run=None):
        self._should_log = should_log
        self._should_throw = should_throw
        self._should_throw_when_run = should_throw_when_run or set()
        # FIXME: Once executive wraps os.getpid() we can just use a static pid for "this" process.
        self._running_pids = [os.getpid()]

    def check_running_pid(self, pid):
        return pid in self._running_pids

    def run_and_throw_if_fail(self, args, quiet=False, cwd=None, env=None):
        if self._should_log:
            env_string = ""
            if env:
                env_string = ", env=%s" % env
            log("MOCK run_and_throw_if_fail: %s, cwd=%s%s" % (args, cwd, env_string))
        if self._should_throw_when_run.intersection(args):
            raise ScriptError("Exception for %s" % args, output="MOCK command output")
        return "MOCK output of child process"

    def run_command(self,
                    args,
                    cwd=None,
                    input=None,
                    error_handler=None,
                    return_exit_code=False,
                    return_stderr=True,
                    decode_output=False,
                    env=None):
        assert(isinstance(args, list) or isinstance(args, tuple))
        if self._should_log:
            env_string = ""
            if env:
                env_string = ", env=%s" % env
            log("MOCK run_command: %s, cwd=%s%s" % (args, cwd, env_string))
        output = "MOCK output of child process"
        if self._should_throw:
            raise ScriptError("MOCK ScriptError", output=output)
        return output

    def cpu_count(self):
        return 2

    def popen(self, *args, **kwargs):
        # FIXME: Implement logging when self._should_log is set.
        return MockProcess()


class MockExecutive2(object):
    @staticmethod
    def ignore_error(error):
        pass

    def __init__(self, output='', exit_code=0, exception=None,
                 run_command_fn=None, stderr=''):
        self._output = output
        self._stderr = stderr
        self._exit_code = exit_code
        self._exception = exception
        self._run_command_fn = run_command_fn

    def cpu_count(self):
        return 2

    def kill_all(self, process_name):
        pass

    def kill_process(self, pid):
        pass

    def run_command(self,
                    args,
                    cwd=None,
                    input=None,
                    error_handler=None,
                    return_exit_code=False,
                    return_stderr=True,
                    decode_output=False,
                    env=None):
        assert(isinstance(args, list) or isinstance(args, tuple))
        if self._exception:
            raise self._exception
        if self._run_command_fn:
            return self._run_command_fn(args)
        if return_exit_code:
            return self._exit_code
        if self._exit_code and error_handler:
            script_error = ScriptError(script_args=args, exit_code=self._exit_code, output=self._output)
            error_handler(script_error)
        if return_stderr:
            return self._output + self._stderr
        return self._output