# @file
# Script to Build OVMF UEFI firmware
#
# Copyright (c) Microsoft Corporation.
# SPDX-License-Identifier: BSD-2-Clause-Patent
##
import os
import shutil
import logging
import io

from edk2toolext.environment import shell_environment
from edk2toolext.environment.uefi_build import UefiBuilder
from edk2toolext.invocables.edk2_platform_build import BuildSettingsManager
from edk2toolext.invocables.edk2_setup import SetupSettingsManager, RequiredSubmodule
from edk2toolext.invocables.edk2_update import UpdateSettingsManager
from edk2toolext.invocables.edk2_pr_eval import PrEvalSettingsManager
from edk2toollib.utility_functions import RunCmd


    # ####################################################################################### #
    #                         Configuration for Update & Setup                                #
    # ####################################################################################### #
class SettingsManager(UpdateSettingsManager, SetupSettingsManager, PrEvalSettingsManager):

    def GetPackagesSupported(self):
        ''' return iterable of edk2 packages supported by this build.
        These should be edk2 workspace relative paths '''
        return CommonPlatform.PackagesSupported

    def GetArchitecturesSupported(self):
        ''' return iterable of edk2 architectures supported by this build '''
        return CommonPlatform.ArchSupported

    def GetTargetsSupported(self):
        ''' return iterable of edk2 target tags supported by this build '''
        return CommonPlatform.TargetsSupported

    def GetRequiredSubmodules(self):
        ''' return iterable containing RequiredSubmodule objects.
        If no RequiredSubmodules return an empty iterable
        '''
        rs = []

        # intentionally declare this one with recursive false to avoid overhead
        rs.append(RequiredSubmodule(
            "CryptoPkg/Library/OpensslLib/openssl", False))

        # To avoid maintenance of this file for every new submodule
        # lets just parse the .gitmodules and add each if not already in list.
        # The GetRequiredSubmodules is designed to allow a build to optimize
        # the desired submodules but it isn't necessary for this repository.
        result = io.StringIO()
        ret = RunCmd("git", "config --file .gitmodules --get-regexp path", workingdir=self.GetWorkspaceRoot(), outstream=result)
        # Cmd output is expected to look like:
        # submodule.CryptoPkg/Library/OpensslLib/openssl.path CryptoPkg/Library/OpensslLib/openssl
        if ret == 0:
            for line in result.getvalue().splitlines():
                _, _, path = line.partition(" ")
                if path is not None:
                    if path not in [x.path for x in rs]:
                        rs.append(RequiredSubmodule(path, True)) # add it with recursive since we don't know
        return rs

    def SetArchitectures(self, list_of_requested_architectures):
        ''' Confirm the requests architecture list is valid and configure SettingsManager
        to run only the requested architectures.

        Raise Exception if a list_of_requested_architectures is not supported
        '''
        unsupported = set(list_of_requested_architectures) - set(self.GetArchitecturesSupported())
        if(len(unsupported) > 0):
            errorString = ( "Unsupported Architecture Requested: " + " ".join(unsupported))
            logging.critical( errorString )
            raise Exception( errorString )
        self.ActualArchitectures = list_of_requested_architectures

    def GetWorkspaceRoot(self):
        ''' get WorkspacePath '''
        return CommonPlatform.WorkspaceRoot

    def GetActiveScopes(self):
        ''' return tuple containing scopes that should be active for this process '''
        return CommonPlatform.Scopes

    def FilterPackagesToTest(self, changedFilesList: list, potentialPackagesList: list) -> list:
        ''' Filter other cases that this package should be built
        based on changed files. This should cover things that can't
        be detected as dependencies. '''
        build_these_packages = []
        possible_packages = potentialPackagesList.copy()
        for f in changedFilesList:
            # BaseTools files that might change the build
            if "BaseTools" in f:
                if os.path.splitext(f) not in [".txt", ".md"]:
                    build_these_packages = possible_packages
                    break

            # if the azure pipeline platform template file changed
            if "platform-build-run-steps.yml" in f:
                build_these_packages = possible_packages
                break

        return build_these_packages

    def GetPlatformDscAndConfig(self) -> tuple:
        ''' If a platform desires to provide its DSC then Policy 4 will evaluate if
        any of the changes will be built in the dsc.

        The tuple should be (<workspace relative path to dsc file>, <input dictionary of dsc key value pairs>)
        '''
        dsc = CommonPlatform.GetDscName(",".join(self.ActualArchitectures))
        return (f"OvmfPkg/{dsc}", {})


    # ####################################################################################### #
    #                         Actual Configuration for Platform Build                         #
    # ####################################################################################### #
class PlatformBuilder( UefiBuilder, BuildSettingsManager):
    def __init__(self):
        UefiBuilder.__init__(self)

    def AddCommandLineOptions(self, parserObj):
        ''' Add command line options to the argparser '''
        parserObj.add_argument('-a', "--arch", dest="build_arch", type=str, default="X64",
            help="Optional - CSV of architecture to build. "
            "X64 will use X64 for both PEI and DXE.  IA32,X64 will use IA32 for PEI and "
            "X64 for DXE. Default is X64")

    def RetrieveCommandLineOptions(self, args):
        '''  Retrieve command line options from the argparser '''

        shell_environment.GetBuildVars().SetValue("TARGET_ARCH"," ".join(args.build_arch.upper().split(",")), "From CmdLine")
        dsc = CommonPlatform.GetDscName(args.build_arch)
        shell_environment.GetBuildVars().SetValue("ACTIVE_PLATFORM", f"OvmfPkg/{dsc}", "From CmdLine")

    def GetWorkspaceRoot(self):
        ''' get WorkspacePath '''
        return CommonPlatform.WorkspaceRoot

    def GetPackagesPath(self):
        ''' Return a list of workspace relative paths that should be mapped as edk2 PackagesPath '''
        return ()

    def GetActiveScopes(self):
        ''' return tuple containing scopes that should be active for this process '''
        return CommonPlatform.Scopes

    def GetName(self):
        ''' Get the name of the repo, platform, or product being build '''
        ''' Used for naming the log file, among others '''
        # check the startup nsh flag and if set then rename the log file.
        # this helps in CI so we don't overwrite the build log since running
        # uses the stuart_build command.
        if(shell_environment.GetBuildVars().GetValue("MAKE_STARTUP_NSH", "FALSE") == "TRUE"):
            return "OvmfPkg_With_Run"
        return "OvmfPkg"

    def GetLoggingLevel(self, loggerType):
        ''' Get the logging level for a given type
        base == lowest logging level supported
        con  == Screen logging
        txt  == plain text file logging
        md   == markdown file logging
        '''
        return logging.DEBUG

    def SetPlatformEnv(self):
        logging.debug("PlatformBuilder SetPlatformEnv")
        self.env.SetValue("PRODUCT_NAME", "OVMF", "Platform Hardcoded")
        self.env.SetValue("MAKE_STARTUP_NSH", "FALSE", "Default to false")
        self.env.SetValue("QEMU_HEADLESS", "FALSE", "Default to false")
        self.env.SetValue("DISABLE_DEBUG_MACRO_CHECK", "TRUE", "Disable by default")
        return 0

    def PlatformPreBuild(self):
        return 0

    def PlatformPostBuild(self):
        return 0

    def FlashRomImage(self):
        VirtualDrive = os.path.join(self.env.GetValue("BUILD_OUTPUT_BASE"), "VirtualDrive")
        VirtualDriveBoot = os.path.join(VirtualDrive, "EFI", "BOOT")
        os.makedirs(VirtualDriveBoot, exist_ok=True)
        OutputPath_FV = os.path.join(self.env.GetValue("BUILD_OUTPUT_BASE"), "FV")

        if (self.env.GetValue("QEMU_SKIP") and
            self.env.GetValue("QEMU_SKIP").upper() == "TRUE"):
            logging.info("skipping qemu boot test")
            return 0

        # copy shell to VirtualDrive
        for arch in self.env.GetValue("TARGET_ARCH").split():
            src = os.path.join(self.env.GetValue("BUILD_OUTPUT_BASE"), arch, "Shell.efi")
            dst = os.path.join(VirtualDriveBoot, f'BOOT{arch}.EFI')
            if os.path.exists(src):
                logging.info("copy %s -> %s", src, dst)
                shutil.copyfile(src, dst)

        #
        # QEMU must be on the path
        #
        cmd = "qemu-system-x86_64"
        args  = "-debugcon stdio"                                           # write messages to stdio
        args += " -global isa-debugcon.iobase=0x402"                        # debug messages out thru virtual io port
        args += " -net none"                                                # turn off network
        args += " -smp 4"
        args += " -cpu IvyBridge,+rdrand"                                   # IvyBridge is the first CPU that supported
                                                                            # RDRAND, which is required for dynamic
                                                                            # stack cookies
        args += f" -drive file=fat:rw:{VirtualDrive},format=raw,media=disk" # Mount disk with startup.nsh
        # Provides Rng services to the Guest VM
        args += " -device virtio-rng-pci"

        if (self.env.GetValue("QEMU_HEADLESS").upper() == "TRUE"):
            args += " -display none"  # no graphics

        if (self.env.GetBuildValue("SMM_REQUIRE") == "1"):
            args += " -machine q35,smm=on" #,accel=(tcg|kvm)"
            args += " --accel tcg,thread=single"
            #args += " -m ..."
            args += " -global driver=cfi.pflash01,property=secure,value=on"
            args += " -drive if=pflash,format=raw,unit=0,file=" + os.path.join(OutputPath_FV, "OVMF_CODE.fd") + ",readonly=on"
            args += " -drive if=pflash,format=raw,unit=1,file=" + os.path.join(OutputPath_FV, "OVMF_VARS.fd")
            if (self.env.GetBuildValue("STANDALONE_MM_ENABLE") == "1"):
                # We will not support S3 in standalone MM mode
                args += " -global ICH9-LPC.disable_s3=1"
                # Make MMRAM bigger as it will need to hold the FV where the MM core is at
                args += " -global mch.extended-tseg-mbytes=32"
        else:
            args += " -pflash " + os.path.join(OutputPath_FV, "OVMF.fd")    # path to firmware


        if (self.env.GetValue("MAKE_STARTUP_NSH").upper() == "TRUE"):
            f = open(os.path.join(VirtualDrive, "startup.nsh"), "w")
            f.write("BOOT SUCCESS !!! \n")
            ## add commands here
            f.write("reset -s\n")
            f.close()

        ret = RunCmd(cmd, args)

        if ret == 0xc0000005:
            #for some reason getting a c0000005 on successful return
            return 0

        return ret