# Copyright (C) 2021-2024 Saturneric <eric@bktus.com>
#
# This file is part of GpgFrontend.
#
# GpgFrontend is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# GpgFrontend is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
#
# The initial version of the source code is inherited from
# the gpg4usb project, which is under GPL-3.0-or-later.
#
# All the source code of GpgFrontend was modified and released by
# Saturneric <eric@bktus.com> starting on May 12, 2021.
#
# SPDX-License-Identifier: GPL-3.0-or-later

cmake_minimum_required(VERSION 3.16)

message(STATUS "Current Generator: ${CMAKE_GENERATOR}")

if(CMAKE_GENERATOR STREQUAL "Xcode")
  set(CMAKE_USER_MAKE_RULES_OVERRIDE "${CMAKE_SOURCE_DIR}/cmake/FlagsOverridesXcode.cmake")
  set(XCODE_BUILD 1)
else()
  set(CMAKE_USER_MAKE_RULES_OVERRIDE "${CMAKE_SOURCE_DIR}/cmake/FlagsOverrides.cmake")
endif()

# define project
project(GpgFrontend
  VERSION 2.1.8
  DESCRIPTION "GpgFrontend is a free, open-source, robust yet user-friendly, compact and cross-platform tool for OpenPGP encryption."
  HOMEPAGE_URL "https://gpgfrontend.bktus.com"
  LANGUAGES CXX)

# show cmake version
message(STATUS "GpgFrontend Build Configuration Started CMAKE Version ${CMAKE_VERSION}")

include(CheckIncludeFiles)
include(CheckIncludeFileCXX)
include(CheckFunctionExists)
include(CheckSymbolExists)
include(CheckTypeSize)
include(CheckLibraryExists)
include(CheckCXXSourceCompiles)

# generate compile_commands.json
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

# build type options
option(GPGFRONTEND_BUILD_TYPE_TEST_CORE
  "Only compile the core and generate the unit test program" OFF)
option(GPGFRONTEND_BUILD_TYPE_TEST_CORE_AND_COVERAGE
  "Compile only the core and generate unit test programs that can evaluate test coverage" OFF)
option(GPGFRONTEND_BUILD_TYPE_TEST_UI
  "Only generate a graphical interface with basic functions" OFF)
option(GPGFRONTEND_BUILD_TYPE_TEST_ALL
  "Generate a graphical interface with all functions" OFF)
option(GPGFRONTEND_BUILD_TYPE_STABLE
  "Generate release version" ON)
option(GPGFRONTEND_BUILD_TYPE_FULL_SDK "Build and install all headers and libs exclude application" OFF)
option(GPGFRONTEND_BUILD_TYPE_ONLY_SDK "Build and install sdk headers and libs" OFF)
option(GPGFRONTEND_BUILD_TYPE_ONLY_APPLICATION "Generate a usable SDK" OFF)

# function or mode options
option(GPGFRONTEND_QT5_BUILD "Swith to Qt5 building mode" OFF)
option(GPGFRONTEND_GENERATE_LINUX_INSTALL_SOFTWARE "Generate an installable version" OFF)
option(GPGFRONTEND_ENABLE_ASAN "Enable ASAN" OFF)
option(GPGFRONTEND_BUILD_APP_IMAGE "Build AppImage" OFF)

# xcode options
option(GPGFRONTEND_XCODE_TEAM_ID "GpgFrontend Apple Team ID" "NONE")
option(GPGFRONTEND_XOCDE_CODE_SIGN_IDENTITY "GpgFrontend Signing Certificate" "NONE")
option(GPGFRONTEND_XOCDE_APPID "GpgFrontend Apple AppID" "NONE")
option(GPGFRONTEND_XOCDE_PROVISIONING_PROFILE_UUID "GpgFrontend ProvisioningProfile UUID" "NONE")
option(GPGFRONTEND_XOCDE_ENABLE_SANDBOX "Enable SandBox For Xcode Build" OFF)

# analyse options
if(GPGFRONTEND_BUILD_TYPE_TEST_CORE)
  set(CMAKE_BUILD_TYPE "Debug")
  set(GPGFRONTEND_BUILD_CONFIG "test_core")
endif()

if(GPGFRONTEND_BUILD_TYPE_TEST_CORE_AND_COVERAGE)
  set(CMAKE_BUILD_TYPE "Debug")
  set(GPGFRONTEND_BUILD_CONFIG "test_core_coverage")
endif()

if(GPGFRONTEND_BUILD_TYPE_TEST_UI)
  set(CMAKE_BUILD_TYPE "Debug")
  set(GPGFRONTEND_BUILD_CONFIG "test_ui")
endif()

if(GPGFRONTEND_BUILD_TYPE_TEST_ALL)
  set(CMAKE_BUILD_TYPE "Debug")
  set(GPGFRONTEND_BUILD_CONFIG "test_all")
endif()

# Specify compilation mode
message(STATUS "Switch Build Configure STABLE_BUILD_APPLICATION")
set(STABLE_BUILD_APPLICATION 1)

# stable features
if(GPGFRONTEND_BUILD_TYPE_STABLE)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE_AND_COVERAGE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_UI 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_ALL 0)
  unset(GPGFRONTEND_BUILD_CONFIG)

  set(STABLE_BUILD_APPLICATION 1)
endif()

# linux package build
if(GPGFRONTEND_GENERATE_LINUX_INSTALL_SOFTWARE)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE_AND_COVERAGE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_UI 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_ALL 0)
  unset(GPGFRONTEND_BUILD_CONFIG)

  set(LINUX_INSTALL_SOFTWARE 1)
endif()

if(GPGFRONTEND_BUILD_TYPE_FULL_SDK)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE_AND_COVERAGE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_UI 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_ALL 0)
  unset(GPGFRONTEND_BUILD_CONFIG)

  set(STABLE_BUILD_APPLICATION 0)
  set(STABLE_BUILD_FULL_SDK 1)
endif()

if(GPGFRONTEND_BUILD_TYPE_ONLY_SDK)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE_AND_COVERAGE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_UI 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_ALL 0)
  unset(GPGFRONTEND_BUILD_CONFIG)

  set(STABLE_BUILD_APPLICATION 0)
  set(STABLE_BUILD_ONLY_SDK 1)
endif()

if(GPGFRONTEND_BUILD_TYPE_ONLY_APPLICATION)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE_AND_COVERAGE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_UI 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_ALL 0)
  unset(GPGFRONTEND_BUILD_CONFIG)

  set(STABLE_BUILD_APPLICATION 0)
  set(STABLE_BUILD_ONLY_APPLICATION 1)
endif()

if(GPGFRONTEND_BUILD_APP_IMAGE)
  set(BUILD_APP_IMAGE 1)
endif()

# C++

# options for ccache
find_program(CCACHE_FOUND ccache)

if(CCACHE_FOUND)
  set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
  set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
endif(CCACHE_FOUND)

# detect compiler
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
  # using clang
  if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
    message(FATAL_ERROR "Clang version must be at least 9.0!")
  endif()

  message(STATUS "Build System Using Compiler CLANG, VERSION: ${CMAKE_CXX_COMPILER_VERSION}")
  set(USING_COMPILER_CLANG 1)

elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
  # using gcc
  if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 8.0)
    message(FATAL_ERROR "GCC version must be at least 8.0!")
  endif()

  message(STATUS "Build System Using Compiler GCC, VERSION: ${CMAKE_CXX_COMPILER_VERSION}")
  set(USING_COMPILER_GCC 1)

elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
  # using Intel C++
  message(FATAL_ERROR "Intel C++ is not supported.")

elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
  # using Visual Studio C++
  message(FATAL_ERROR "MSVC is not supported.")
else()
  # using a unknown compiler
  message(FATAL_ERROR "Compiler: ${CMAKE_CXX_COMPILER_ID} is not supported.")
endif()

# Using Standard C++-17 (Consider compatibility)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

# CMake
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

# Check Env Variables Before Configuring
if(NOT CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE "Release")
endif()

if(CMAKE_BUILD_TYPE STREQUAL "Release")
  add_compile_definitions(RELEASE)
else()
  add_compile_definitions(DEBUG)
endif()

# use xcode archive build at macos release at default
if(CMAKE_BUILD_TYPE STREQUAL "Release" AND APPLE)
  set(GPGFRONTEND_GENERATE_LINUX_INSTALL_SOFTWARE 0)
  set(LINUX_INSTALL_SOFTWARE 0)

  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_CORE_AND_COVERAGE 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_UI 0)
  set(GPGFRONTEND_BUILD_TYPE_TEST_ALL 0)

  unset(GPGFRONTEND_BUILD_CONFIG)
endif()

# if enable ASAN
if(GPGFRONTEND_ENABLE_ASAN)
  # check compiler
  if(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
    message(FATAL_ERROR "Use GPGFRONTEND_ENABLE_ASAN only when using the clang compiler.")
  endif()

  add_compile_options(-fsanitize=address -fsanitize-recover=address)
  add_link_options(-fsanitize=address -fsanitize-recover=address)

  set(ENABLE_ASAN 1)
endif()

set(AppName GpgFrontend)

# Get Git Information
set(GIT_COMMIT_HASH "")
set(GIT_BRANCH_NAME "")
find_package(Git QUIET)

if(GIT_FOUND)
  execute_process(
    COMMAND ${GIT_EXECUTABLE} log -1 --pretty=format:%H
    OUTPUT_VARIABLE GIT_COMMIT_HASH
    OUTPUT_STRIP_TRAILING_WHITESPACE
    ERROR_QUIET
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  )
  execute_process(
    COMMAND ${GIT_EXECUTABLE} symbolic-ref --short -q HEAD
    OUTPUT_VARIABLE GIT_BRANCH_NAME
    OUTPUT_STRIP_TRAILING_WHITESPACE
    ERROR_QUIET
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  )
endif()

set(BUILD_VERSION ${PROJECT_VERSION}_${CMAKE_SYSTEM}_${CMAKE_SYSTEM_PROCESSOR}_${CMAKE_BUILD_TYPE})
set(GIT_VERSION ${GIT_BRANCH_NAME}_${GIT_COMMIT_HASH})
string(TIMESTAMP BUILD_TIMESTAMP UTC)

# Convert BUILD_VERSION and GIT_VERSION to lowercase
string(TOLOWER "${BUILD_VERSION}" BUILD_VERSION)
string(TOLOWER "${GIT_VERSION}" GIT_VERSION)

message(STATUS "GpgFrontend Build Timestamp ${BUILD_TIMESTAMP}")
message(STATUS "GpgFrontend Build Version ${BUILD_VERSION}")
message(STATUS "GpgFrontend Git Repo Version ${GIT_VERSION}")

# support for dymatic libraries
include(GenerateExportHeader)

# Windows
IF(MINGW)
  message(STATUS "GpgFrontend Configuration For OS Platform Microsoft Windows")
  message(STATUS "Build Environment MINGW")

  set(OS_PLATFORM 0)

  include_directories(
    ${CMAKE_CURRENT_SOURCE_DIR}/src
    ${CMAKE_CURRENT_SOURCE_DIR}/third_party
    /mingw64/include
  )
  link_directories(
    ${CMAKE_SOURCE_DIR}/lib/mingw
    /mingw64/lib
  )

  # Http Request User Agent
  set(HTTP_REQUEST_USER_AGENT "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0")
endif()

# macOS
if(APPLE)
  message(STATUS "GpgFrontend Configuration For OS Platform MacOS")

  set(OS_PLATFORM 1)

  if(XCODE_BUILD)
    set(XCODE_CODE_SIGN_IDENTITY "\"${XCODE_CODE_SIGN_IDENTITY}\"")
    message(STATUS "XCODE_CODE_SIGN_IDENTITY ${XCODE_CODE_SIGN_IDENTITY}")

    if(APPLE_SANDBOX)
      add_compile_definitions(APPLE_SANDBOX)
    endif()
  endif()

  include_directories(
    ${CMAKE_CURRENT_SOURCE_DIR}/src
    ${CMAKE_CURRENT_SOURCE_DIR}/third_party
    /usr/local/include
    /opt/homebrew/include
  )
  link_directories(
    /usr/local/lib
    /opt/homebrew/lib
  )

  # Http Request User Agent
  set(HTTP_REQUEST_USER_AGENT "Mozilla/5.0 (Macintosh; Intel Mac OS X 14.3; rv:123.0) Gecko/20100101 Firefox/123.0")
endif()

if(UNIX AND NOT APPLE)
  set(LINUX TRUE)
endif()

if(LINUX)
  message(STATUS "GpgFrontend Configuration For OS Platform Linux")

  set(OS_PLATFORM 2)

  # Get Env Info
  find_program(UNAME_PROGRAM uname)

  if(UNAME_PROGRAM)
    execute_process(COMMAND ${UNAME_PROGRAM} OUTPUT_VARIABLE SYSTEM_NAME OUTPUT_STRIP_TRAILING_WHITESPACE)
  endif()

  if(USING_COMPILER_CLANG)
    add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-stdlib=libstdc++>)
  endif()

  if(SYSTEM_NAME STREQUAL "FreeBSD")
    message(STATUS "FreeBSD BOX")
    add_compile_definitions(FREEBSD)
    set(FREEBSD TRUE)
  endif()

  include_directories(
    ${CMAKE_CURRENT_SOURCE_DIR}/src
    ${CMAKE_CURRENT_SOURCE_DIR}/third_party
    /usr/include
    /usr/local/include
  )
  link_directories(${CMAKE_CURRENT_SOURCE_DIR}/lib/)
  link_directories(
    /lib/
    /usr/lib/
    /usr/local/lib/
  )

  # Http Request User Agent
  set(HTTP_REQUEST_USER_AGENT "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0")
endif()

if(LINUX_INSTALL_SOFTWARE)
  message(STATUS "Linux Install Traget ${CMAKE_INSTALL_PREFIX}")
  include(GNUInstallDirs)
  set(APP_INSTALL_FLAG LINUX_INSTALL)
  add_compile_definitions(LINUX_INSTALL_BUILD)
else()
  set(APP_INSTALL_FLAG BUNDLE)
endif()

if(GPGFRONTEND_QT5_BUILD)
  # Support Qt version: 5.15.x
  find_package(Qt5 5.15 COMPONENTS Core Widgets PrintSupport Network LinguistTools REQUIRED)
else()
  # Support Qt version: 6.x
  find_package(Qt6 6 COMPONENTS Core Widgets PrintSupport Network LinguistTools REQUIRED)
endif()

# Qt configuration
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)

set(CMAKE_AUTORCC_OPTIONS "--compress;9")
set(CMAKE_AUTOUIC_SEARCH_PATHS ${CMAKE_AUTOUIC_SEARCH_PATHS} ${CMAKE_SOURCE_DIR}/ui)

if(STABLE_BUILD_APPLICATION)
  message("[*] Build Stable Application")
  set(BUILD_CORE 1)
  set(BUILD_UI 1)
  set(BUILD_TEST 1)
  set(BUILD_SDK 1)
  set(BUILD_APPLICATION 1)
  set(SUPPORT_MULTI_LANG 1)
elseif(STABLE_BUILD_ONLY_SDK)
  message("[*] Build SDK")
  set(BUILD_CORE 1)
  set(BUILD_UI 1)
  set(BUILD_SDK 1)
elseif(STABLE_BUILD_FULL_SDK)
  message("[*] Build All Headers and Libs (SDK fully build)")
  set(BUILD_CORE 1)
  set(BUILD_UI 1)
  set(BUILD_TEST 1)
  set(BUILD_SDK 1)
elseif(GPGFRONTEND_BUILD_TYPE_ONLY_APPLICATION)
  message("[*] Build executable only")
  set(BUILD_CORE 0)
  set(BUILD_UI 0)
  set(BUILD_TEST 0)
  set(BUILD_SDK 0)
  set(BUILD_APPLICATION 1)
  set(SUPPORT_MULTI_LANG 1)
endif()

# For instance in order to select the highest version one
SET(CMAKE_FIND_PACKAGE_SORT_ORDER NATURAL)
SET(CMAKE_FIND_PACKAGE_SORT_DIRECTION DEC)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

if(SUPPORT_MULTI_LANG)
  add_compile_definitions(SUPPORT_MULTI_LANG)
endif()

# Output Env Variables
message(STATUS "Build Type: ${CMAKE_BUILD_TYPE}")
message(STATUS "Build C Flags: ${CMAKE_C_FLAGS}")
message(STATUS "Build C++ Flags: ${CMAKE_CXX_FLAGS}")

# third_party
add_subdirectory(third_party) # source code
add_subdirectory(src)