###########################################################################
# Copyright 2015, 2016, 2017 IoT.bzh
#
# author: Fulup Ar Foll <fulup@iot.bzh>
# contrib: Romain Forlot <romain.forlot@iot.bzh>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
###########################################################################


#--------------------------------------------------------------------------
#  WARNING: 
#     Do not change this cmake template
#     Customise your preferences in "./etc/config.cmake"
#--------------------------------------------------------------------------


# Generic useful macro
# -----------------------
macro(PROJECT_TARGET_ADD TARGET_NAME)
	set(PROJECT_TARGETS ${PROJECT_TARGETS} ${TARGET_NAME} CACHE INTERNAL PROJECT_TARGETS)
	set(TARGET_NAME ${TARGET_NAME})
endmacro(PROJECT_TARGET_ADD)

macro(defstr name value)
	add_definitions(-D${name}=${value})
endmacro(defstr)

macro(setc name value)
	if(NOT DEFINED ${name})
	set(${name} ${value})
	endif(NOT DEFINED ${name})
endmacro(setc)

# Dumb macro to add each directory under a path. Make sure we grab all header files!
macro(fill_include_dir path)
	file(GLOB_RECURSE dirlist LIST_DIRECTORIES true "${path}/*")
	foreach(filename ${dirlist})
		if(IS_DIRECTORY ${filename})
			include_directories(${filename})
		endif(IS_DIRECTORY ${filename})
	endforeach()
endmacro(fill_include_dir)

# Helper function to retrieve source files from a library repo.
function(find_source_files path)
	file(GLOB_RECURSE filelist "${path}/*.[cpx]")
	foreach(filename ${filelist})
		if(NOT ${filename} MATCHES ".*(test|example|sample).*")
			string(APPEND sources "${filename};")
		endif(NOT ${filename} MATCHES ".*(test|example|sample).*")
	endforeach()
	set(sources_files ${sources} PARENT_SCOPE)
endfunction(find_source_files)

# WGT packaging function. TYPE can be HTML5, NATIVE, HTML5-HYBRID or BINDING
macro(build_widget type)
	message(STATUS "Creation of ${TARGET_NAME}.wgt package for AppFW")

	configure_file(${PROJECT_WGT_DIR}/config.xml config.xml)

	if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_WGT_DIR}/etc")
		file(GLOB conf_files "${PROJECT_WGT_DIR}/etc/*")
		foreach(filename ${conf_files})
			STRING(REGEX REPLACE "^.*/(.*)$" "\\1" shortname ${filename})
			message(STATUS "Copying config file ${shortname}")
			configure_file(${filename} ${shortname})
		endforeach()
	endif(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_WGT_DIR}/etc")

	# Include HTML5 files to be packaged
	if(${type} STREQUAL "HTML5")
		file(GLOB_RECURSE HTML5FILES app/*)

		if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/gulpfile.js")
			set(HTML5FILES ${HTML5FILES} "${CMAKE_CURRENT_SOURCE_DIR}/gulpfile.js")
		endif(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/gulpfile.js")

		if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/bower.json")
			set(HTML5FILES ${HTML5FILES} "${CMAKE_CURRENT_SOURCE_DIR}/bower.json")
		endif(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/bower.json")

		if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/package.json")
			set(HTML5FILES ${HTML5FILES} "${CMAKE_CURRENT_SOURCE_DIR}/package.json")
		endif(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/package.json")
	endif(${type} STREQUAL "HTML5")

	if(${type} STREQUAL "HTML5")
		add_custom_command(
			OUTPUT ${TARGET_NAME}.wgt
			DEPENDS ${HTML5FILES} ${PROJECT_WGT_DIR}/config.xml
			COMMAND rm -rf package
			COMMAND mkdir -p package/lib package/htdocs package/etc package/bin
			COMMAND cd ${CMAKE_CURRENT_SOURCE_DIR} && gulp widget-config-prod
			COMMAND cp -a dist.prod/* ${CMAKE_CURRENT_BINARY_DIR}/package/htdocs
		)
	endif(${type} STREQUAL "HTML5")

	if(${type} STREQUAL "HTML5-HYBRID")
		add_custom_command(
			OUTPUT ${TARGET_NAME}.wgt
			DEPENDS ${HTML5FILES} ${PROJECT_WGT_DIR}/config.xml 
			COMMAND rm -rf package
			COMMAND mkdir -p package/lib package/htdocs package/etc package/bin
			COMMAND cp ${TARGET_NAME}.so package/lib
		)
	endif(${type} STREQUAL "HTML5-HYBRID")

	if(${type} STREQUAL "BINDING")
		add_custom_command(
			OUTPUT ${TARGET_NAME}.wgt
			DEPENDS ${PROJECT_WGT_DIR}/config.xml
			COMMAND rm -rf package
			COMMAND mkdir -p package/lib package/htdocs package/etc package/bin
			COMMAND cp ${TARGET_NAME}.so package/lib
		)
	endif(${type} STREQUAL "BINDING")

	if(${type} STREQUAL "NATIVE")
		add_custom_command(
			OUTPUT ${TARGET_NAME}.wgt
			DEPENDS ${PROJECT_WGT_DIR}/config.xml
			COMMAND rm -rf package
			COMMAND mkdir -p package/lib package/htdocs package/etc package/bin
			COMMAND cp ${TARGET_NAME} package/bin
		)
	endif(${type} STREQUAL "NATIVE")

	add_custom_command(
		OUTPUT ${TARGET_NAME}.wgt
		COMMAND cp config.xml package/
		COMMAND cp ${conf_files} package/etc
		COMMAND cp ${CMAKE_CURRENT_SOURCE_DIR}/packaging/wgt/${PROJECT_ICON} package/icon.png
		COMMAND wgtpkg-pack -f -o ${TARGET_NAME}.wgt package
		APPEND
	)
	add_custom_target(widget ALL DEPENDS ${TARGET_NAME}.wgt)
endmacro()

CMAKE_MINIMUM_REQUIRED(VERSION 3.3)
setc(CMAKE_BUILD_TYPE Debug)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
set(CMP0048 1)

# Compiler selection should append before project definition
# -----------------------------------------------------------
foreach (GCC_VERSION "6" "5")
	execute_process(COMMAND gcc-${GCC_VERSION} -dumpversion RESULT_VARIABLE GCCRC OUTPUT_QUIET ERROR_QUIET)
	if(GCCRC EQUAL 0)
		set(CMAKE_C_COMPILER "gcc-${GCC_VERSION}")
		set(CMAKE_CXX_COMPILER "g++-${GCC_VERSION}")
		set(CMAKE_C_VERSION ${GCC_VERSION})
		break()
	endif(GCCRC EQUAL 0)
endforeach(GCC_VERSION)

# Include project configuration
# ------------------------------
include(${CMAKE_CURRENT_SOURCE_DIR}/etc/config.cmake)
project(${NAME} VERSION ${VERSION})
setc(PROJECT_PRETTY_NAME "${PRETTY_NAME}")
setc(PROJECT_DESCRIPTION "${DESCRIPTION}")
setc(PROJECT_WGT_DIR "packaging/wgt")
setc(PROJECT_LIBDIR "libs")
setc(PROJECT_RESOURCES "data")

message(STATUS "")
message(STATUS "Project=${PROJECT_NAME}/${VERSION}[${PRETTY_NAME} ${DESCRIPTION}]")
message(STATUS "")
message(STATUS "gcc/g++ version-${CMAKE_C_VERSION}.x selected")

INCLUDE(FindPkgConfig)
INCLUDE(CheckIncludeFiles)
INCLUDE(CheckLibraryExists)
INCLUDE(GNUInstallDirs)

# Default compilation options
############################################################################
link_libraries(-Wl,--as-needed -Wl,--gc-sections)
add_compile_options(-Wall -Wextra -Wconversion)
add_compile_options(-Wno-unused-parameter) # frankly not using a parameter does it care?
add_compile_options(-Wno-sign-compare -Wno-sign-conversion)
add_compile_options(-Werror=maybe-uninitialized)
add_compile_options(-Werror=implicit-function-declaration)
add_compile_options(-ffunction-sections -fdata-sections)
add_compile_options(-fPIC)
add_compile_options(-g)

setc(CMAKE_C_FLAGS_PROFILING   "-g -O2 -pg -Wp,-U_FORTIFY_SOURCE")
setc(CMAKE_C_FLAGS_DEBUG       "-g -O2 -ggdb -Wp,-U_FORTIFY_SOURCE")
setc(CMAKE_C_FLAGS_RELEASE     "-O2")
setc(CMAKE_C_FLAGS_CCOV        "-g -O2 --coverage")

set(CMAKE_CXX_FLAGS_PROFILING    "-g -O0 -std=c++11 -pg -Wp,-U_FORTIFY_SOURCE")
set(CMAKE_CXX_FLAGS_DEBUG        "-g -O0 -std=c++11 -ggdb -Wp,-U_FORTIFY_SOURCE")
set(CMAKE_CXX_FLAGS_RELEASE      "-g -O2 -std=c++11")
set(CMAKE_CXX_FLAGS_CCOV "-g -O2 -std=c++11 --coverage")

setc(CMAKE_INSTALL_PREFIX      "${CMAKE_SOURCE_DIR}/Install")

# (BUG!!!) as PKG_CONFIG_PATH does not work [should be en env variable]
setc(PKG_CONFIG_USE_CMAKE_PREFIX_PATH 1)

# Loop on required package and add options
foreach (PKG_CONFIG ${PKG_REQUIRED_LIST})
	PKG_CHECK_MODULES(${PKG_CONFIG} REQUIRED ${PKG_CONFIG})

	INCLUDE_DIRECTORIES(${${PKG_CONFIG}_INCLUDE_DIRS})
	list (APPEND link_libraries ${${PKG_CONFIG}_LIBRARIES})
	add_compile_options (${${PKG_CONFIG}_CFLAGS})
endforeach(PKG_CONFIG)

# Optional LibEfence Malloc debug library
IF(CMAKE_BUILD_TYPE MATCHES DEBUG)
CHECK_LIBRARY_EXISTS(efence malloc "" HAVE_LIBEFENCE)
IF(HAVE_LIBEFENCE)
	MESSAGE(STATUS "Linking with ElectricFence for debugging purposes...")
	SET(libefence_LIBRARIES "-lefence")
	list (APPEND link_libraries libefence_LIBRARIES})
ENDIF(HAVE_LIBEFENCE)
ENDIF(CMAKE_BUILD_TYPE MATCHES DEBUG)

# set default include directories
#INCLUDE_DIRECTORIES(${EXTRA_INCLUDE_DIRS})
# Brutal but efficace:
fill_include_dir(${CMAKE_CURRENT_SOURCE_DIR})

# If no install dir try to guest some smart default
if(BINDINGS_INSTALL_PREFIX)
	set(BINDINGS_INSTALL_DIR ${BINDINGS_INSTALL_PREFIX}/${PROJECT_NAME})
else()
	set(BINDINGS_INSTALL_DIR ${CMAKE_INSTALL_FULL_LIBDIR}/${PROJECT_NAME})
endif()

# Default Linkflag
if(NOT BINDINGS_LINK_FLAG)
	set(BINDINGS_LINK_FLAG "-Wl,--version-script=${CMAKE_SOURCE_DIR}/etc/export.map")
endif()

# Bindings to compile
# --------------------
file(GLOB filelist "*")
foreach(filename ${filelist})
if(EXISTS "${filename}/CMakeLists.txt")
	add_subdirectory(${filename})
endif(EXISTS "${filename}/CMakeLists.txt")
endforeach()

# Add a dummy target to enable global dependency order
# -----------------------------------------------------
if(EXTRA_DEPENDENCIES_ORDER)
	set(DEPENDENCIES_TARGET ${PROJECT_NAME}_extra_dependencies)
	add_custom_target(${DEPENDENCIES_TARGET} ALL
		DEPENDS ${EXTRA_DEPENDENCY_ORDER} 
	)
endif()

# Cmake does not maintain targets list before 3.7
# -------------------------------------------------
if(${CMAKE_VERSION} VERSION_LESS 3.7)
	set(GLOBAL_TARGET_LIST ${PROJECT_TARGETS})
else()
	get_property(GLOBAL_TARGET_LIST GLOBAL PROPERTY GlobalTargetList)
endif()

# Print developer helper message when everything is done
# -------------------------------------------------------
if(CLOSING_MESSAGE AND GLOBAL_TARGET_LIST)
	add_custom_target(${PROJECT_NAME}_done ALL
		DEPENDS ${DEPENDENCIES_TARGET} ${GLOBAL_TARGET_LIST}
		COMMAND ${CMAKE_COMMAND} -E cmake_echo_color --cyan "++ ${CLOSING_MESSAGE}"
	)
endif()