#-------------------------------------------------------------------------------
# Copyright (c) 2020-2023, Arm Limited. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
#-------------------------------------------------------------------------------

cmake_minimum_required(VERSION 3.15)
find_package(Python3)

############################### Manifest lists declaration #####################
list(APPEND MANIFEST_LISTS ${TFM_MANIFEST_LIST})

if (TFM_EXTRA_MANIFEST_LIST_FILES)
    list(APPEND MANIFEST_LISTS ${TFM_EXTRA_MANIFEST_LIST_FILES})
endif()

if (TFM_EXTRAS_REPO_EXTRA_MANIFEST_LIST)
    set(TMP_MANIFEST_LISTS ${TFM_EXTRAS_REPO_EXTRA_MANIFEST_LIST})
    list(TRANSFORM TMP_MANIFEST_LISTS PREPEND ${TFM_EXTRAS_REPO_PATH}/)
    list(APPEND MANIFEST_LISTS ${TMP_MANIFEST_LISTS})
endif()

# Remove any duplicate entries to prevent same path appended twice in case of mulitiple runs
list(REMOVE_DUPLICATES MANIFEST_LISTS)
list(REMOVE_DUPLICATES TFM_EXTRA_GENERATED_FILE_LIST_PATH)

############################### File list declaration ##########################
set(GENERATED_FILE_LISTS ${CMAKE_CURRENT_SOURCE_DIR}/tfm_generated_file_list.yaml)
set(GENERATED_FILE_LISTS ${GENERATED_FILE_LISTS} ${TFM_EXTRA_GENERATED_FILE_LIST_PATH})

############################### Functions declaration ##########################
# Parses the given YAML "files" to find out all the items of the given "field"
# and put them to the "output_variable" as a list.
function(parse_field_from_yaml files field output_variable)
    set(local_variable "")
    foreach(yaml_file ${files})
        # Load the lines that refer to the key we selected
        file(STRINGS ${yaml_file} temp_variable REGEX " *\"${field}\":")
        # Take only the value of the key
        list(TRANSFORM temp_variable REPLACE " *\"${field}\": *" ";")
        # Remove all commas
        list(TRANSFORM temp_variable REPLACE "," "")
        # Remove all quote marks
        list(TRANSFORM temp_variable REPLACE "\"" "")
        list(APPEND local_variable ${temp_variable})
    endforeach()
    set(${output_variable} ${local_variable} PARENT_SCOPE)
endfunction()

############################### Dependency generation ##########################
# Get all the manifest files from manifest lists
foreach(MANIFEST_LIST ${MANIFEST_LISTS})
    if (NOT EXISTS ${MANIFEST_LIST})
        message(FATAL_ERROR "Manifest list ${MANIFEST_LIST} doesn't exist")
    endif()


    # Get the path of the manifest list
    get_filename_component(MANIFEST_LIST_PATH ${MANIFEST_LIST} DIRECTORY)

    # Get all the "manifest"
    parse_field_from_yaml(${MANIFEST_LIST} manifest MANIFESTS)

    foreach(MANIFEST ${MANIFESTS})
        # Convert to absolute paths
        if (NOT IS_ABSOLUTE ${MANIFEST})
            # First try relative to the manifest
            if (EXISTS "${MANIFEST_LIST_PATH}/${MANIFEST}")
                get_filename_component(MANIFEST "${MANIFEST_LIST_PATH}/${MANIFEST}" ABSOLUTE)
            # Then try relative to the root TF-M source directory
            elseif (EXISTS "${CMAKE_SOURCE_DIR}/${MANIFEST}")
                get_filename_component(MANIFEST "${CMAKE_SOURCE_DIR}/${MANIFEST}" ABSOLUTE)
            endif()
        endif()
        list(APPEND MANIFEST_FILES ${MANIFEST})
    endforeach()
endforeach()

parse_field_from_yaml("${GENERATED_FILE_LISTS}" template TEMPLATE_FILES)
# Replace relative paths with absolute paths
# Paths used in GENERATED_FILE_LISTS are all relative to TF-M root (${CMAKE_SOURCE_DIR})
list(TRANSFORM TEMPLATE_FILES REPLACE "^([^/\\][^:].*)" "${CMAKE_SOURCE_DIR}/\\1")
# Append the fixed templates that are not in the GENERATED_FILE_LISTS
list(APPEND TEMPLATE_FILES
     ${CMAKE_CURRENT_SOURCE_DIR}/templates/manifestfilename.template
     ${CMAKE_CURRENT_SOURCE_DIR}/templates/partition_intermedia.template
     ${CMAKE_CURRENT_SOURCE_DIR}/templates/partition_load_info.template
     ${CMAKE_CURRENT_SOURCE_DIR}/config_impl.cmake.template
)

############################### Generate Manifest config header ################

# The function appends the given `config` to the `out_var` variable.
# Supported `type` are [BOOL, STRING].
# The format of contents appended is
#   #cmakedefine01 config      for BOOL types
#   #cmakedefine config @config@    for STRING types
function(append_manifest_config out_var config type)
    # Operate on a local var and write back to the out_var later
    set(local_var ${${out_var}})

    # Avoid duplications of configs
    string(FIND "${local_var}" ${config} config_exists)
    if(${config_exists} EQUAL -1)   # Not found
        if (${type} STREQUAL "BOOL")
            string(APPEND local_var "#cmakedefine01 ${config}\r\n")
        elseif(${type} STREQUAL "STRING")
            string(APPEND local_var "#cmakedefine ${config} @${config}@\r\n")
        else()
            message(FATAL_ERROR "Unsupported config type: ${type}")
        endif()
    endif()

    set(${out_var} ${local_var} PARENT_SCOPE)
endfunction()

# The following build configurations are required to pass to manifest tool via the config header
#   - The isolation level
#   - The SPM backend
#   - "conditional" attributes for every Secure Partition in manifest lists
append_manifest_config(MANIFEST_CONFIG_H_CONTENT TFM_ISOLATION_LEVEL STRING)
append_manifest_config(MANIFEST_CONFIG_H_CONTENT CONFIG_TFM_SPM_BACKEND STRING)

parse_field_from_yaml("${MANIFEST_LISTS}" conditional CONDITIONS)
foreach(CON ${CONDITIONS})
    append_manifest_config(MANIFEST_CONFIG_H_CONTENT ${CON} BOOL)
endforeach()

# Generate the config header
file(WRITE
     ${CMAKE_CURRENT_BINARY_DIR}/manifest_config.h.in
     ${MANIFEST_CONFIG_H_CONTENT})

configure_file(${CMAKE_CURRENT_BINARY_DIR}/manifest_config.h.in
               ${CMAKE_CURRENT_BINARY_DIR}/manifest_config.h)

############################### Command declaration ############################

# Workaround for heap support
if ("${TEST_PSA_API}" STREQUAL "IPC")
    execute_process(
        WORKING_DIRECTORY ${PSA_ARCH_TESTS_PATH}/api-tests
        COMMAND ${Python3_EXECUTABLE} tools/scripts/manifest_update.py
    )
endif()

if (CONFIG_TFM_PARSE_MANIFEST_QUIET)
    set(PARSE_MANIFEST_QUIET_FLAG "-q")
else()
    set(PARSE_MANIFEST_QUIET_FLAG "")
endif()

set(MANIFEST_COMMAND
    ${Python3_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/tfm_parse_manifest_list.py
    -m ${MANIFEST_LISTS}
    -f ${GENERATED_FILE_LISTS}
    -c ${CMAKE_CURRENT_BINARY_DIR}/manifest_config.h
    -o ${CMAKE_BINARY_DIR}/generated
    ${PARSE_MANIFEST_QUIET_FLAG})

add_custom_command(
    OUTPUT ${CMAKE_BINARY_DIR}/generated
    COMMAND ${MANIFEST_COMMAND}
    DEPENDS ${MANIFEST_LISTS} ${GENERATED_FILE_LISTS}
            ${MANIFEST_FILES} ${TEMPLATE_FILES}
)

add_custom_target(
    manifest_tool
    DEPENDS ${CMAKE_BINARY_DIR}/generated
)

# The files need to be generated before cmake will allow them to be used as
# sources. Due to issue with custom_command scoping the easiest way to do this
# is to run the script at cmake-time.
execute_process(
    COMMAND ${MANIFEST_COMMAND}
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    RESULT_VARIABLE RET
)

if(RET EQUAL 0)
    include(${CMAKE_BINARY_DIR}/generated/tools/config_impl.cmake)
else()
    message(FATAL_ERROR "Manifest tool failed to generate files!")
endif()