# This file was contributed to the Volatility Framework Version 3.
# Copyright (C) 2018 Volatility Foundation.
#
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from typing import List

import volatility.framework.interfaces.plugins as interfaces_plugins
from volatility.framework import constants, exceptions, renderers, interfaces
from volatility.framework.configuration import requirements
from volatility.framework.objects import utility
from volatility.plugins.windows import pslist


class CmdLine(interfaces_plugins.PluginInterface):
    """Lists process command line arguments"""

    @classmethod
    def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
        # Since we're calling the plugin, make sure we have the plugin's requirements
        return [
            requirements.TranslationLayerRequirement(
                name = 'primary', description = 'Memory layer for the kernel', architectures = ["Intel32", "Intel64"]),
            requirements.SymbolTableRequirement(name = "nt_symbols", description = "Windows kernel symbols")
        ] + pslist.PsList.list_processes_filter_requirements

    def _generator(self, procs):

        for proc in procs:
            process_name = utility.array_to_string(proc.ImageFileName)
            # TODO: what kind of exceptions could this raise and what should we do?
            proc_layer_name = proc.add_process_layer()

            try:
                peb = self._context.object(
                    self.config["nt_symbols"] + constants.BANG + "_PEB",
                    layer_name = proc_layer_name,
                    offset = proc.Peb)

                result_text = peb.ProcessParameters.CommandLine.get_string()

            except exceptions.SwappedInvalidAddressException as exp:
                result_text = "Required memory at {0:#x} is inaccessible (swapped)".format(exp.invalid_address)

            except exceptions.PagedInvalidAddressException as exp:
                result_text = "Required memory at {0:#x} is not valid (process exited?)".format(exp.invalid_address)

            yield (0, (proc.UniqueProcessId, process_name, result_text))

    def run(self):

        filter_func = pslist.PsList.create_pid_filter([self.config.get('pid', None)])

        return renderers.TreeGrid([("PID", int), ("Process", str), ("Args", str)],
                                  self._generator(
                                      pslist.PsList.list_processes(
                                          context = self.context,
                                          layer_name = self.config['primary'],
                                          symbol_table = self.config['nt_symbols'],
                                          filter_func = filter_func)))