###############################################################################
# CMake module to search for ECW library - Enhanced Compression Wavelets for JPEG2000.
#
# Sets
#   ECW_FOUND.  If false, don't try to use ecw
#   ECW_INCLUDE_DIR
#   ECW_LIBRARY
#   ECW_VERSION
#
#   Imported target
#   ECW::ECW_ALL
#
# Author:   Alexander Lisovenko, alexander.lisovenko@gmail.com
# Author:   Dmitry Baryshnikov, bishop.dev@gmail.com, Hiroshi Miura
# Copyright (C) 2016, NextGIS <info@nextgis.com>
# Copyright (C) 2017,2018 Hiroshi Miura
################################################################################

if(NOT ECW_ROOT AND DEFINED ENV{ECW_ROOT})
  set(ECW_ROOT "$ENV{ECW_ROOT}")
endif()

find_path(ECW_INCLUDE_DIR NCSECWClient.h)
mark_as_advanced(ECW_INCLUDE_DIR)

if (ECW_INCLUDE_DIR)
    set(MAJOR_VERSION 0)
    set(MINOR_VERSION 0)
    set(SRV_VERSION 0)
    set(BLD_VERSION 0)

    if (EXISTS "${ECW_INCLUDE_DIR}/ECWJP2BuildNumber.h")
        file(READ "${ECW_INCLUDE_DIR}/ECWJP2BuildNumber.h" VERSION_H_CONTENTS)
        string(REGEX MATCH "_VER_MAJOR[ \t]+([0-9]+)" MAJOR_VERSION ${VERSION_H_CONTENTS})
        string(REGEX MATCH "([0-9]+)" MAJOR_VERSION ${MAJOR_VERSION})
        string(REGEX MATCH "_VER_MINOR[ \t]+([0-9]+)" MINOR_VERSION ${VERSION_H_CONTENTS})
        string(REGEX MATCH "([0-9]+)" MINOR_VERSION ${MINOR_VERSION})
        string(REGEX MATCH "_VER_SERVICE[ \t]+([0-9]+)" SRV_VERSION ${VERSION_H_CONTENTS})
        string(REGEX MATCH "([0-9]+)" SRV_VERSION ${SRV_VERSION})
        string(REGEX MATCH "_VER_SERVICE[ \t]+([0-9]+)" BLD_VERSION ${VERSION_H_CONTENTS})
        string(REGEX MATCH "([0-9]+)" BLD_VERSION ${BLD_VERSION})
        set(ECW_VERSION_STRING "${MAJOR_VERSION}.${MINOR_VERSION}")
        unset(VERSION_H_CONTENTS)
    endif()

    if(EXISTS "${ECW_INCLUDE_DIR}/NCSBuildNumber.h")
        file(READ "${ECW_INCLUDE_DIR}/NCSBuildNumber.h" VERSION_H_CONTENTS)
        string(REGEX MATCH "NCS_VERSION_NUMBER[ \t]+([0-9,]+)" ECW_VERSION_NUMBER ${VERSION_H_CONTENTS})
        string(REGEX MATCH "([0-9]+),[0-9]+,[0-9]+,[0-9]+" MAJOR_VERSION ${ECW_VERSION_NUMBER})
        string(REGEX MATCH "[0-9]+,([0-9]+),[0-9]+,[0-9]+" MINOR_VERSION ${ECW_VERSION_NUMBER})
        string(REGEX MATCH "[0-9]+,[0-9]+,([0-9]+),[0-9]+" SRV_VERSION ${ECW_VERSION_NUMBER})
        string(REGEX MATCH "[0-9]+,[0-9]+,[0-9]+,([0-9]+)" BLD_VERSION ${ECW_VERSION_NUMBER})
        string(REGEX REPLACE "," "." ECW_VERSION_STRING ${ECW_VERSION_NUMBER})
        string(REGEX MATCH "NCS_ECWSDK_VERSION_NUMBER[ \t]+([0-9.]+)" ECWSDK_VERSION_NUMBER ${VERSION_H_CONTENTS})
        unset(VERSION_H_CONTENTS)
    endif()
endif()

include(FindPackageHandleStandardArgs)

if (ECW_VERSION_STRING VERSION_GREATER_EQUAL 5.5)
    if (WIN32)
        if (CMAKE_SIZEOF_VOID_P EQUAL 4)
            set(ECW_ARCH Win32)
        else()
            set(ECW_ARCH x64)
        endif()
    else()
        if (CMAKE_SIZEOF_VOID_P EQUAL 4)
            set(ECW_ARCH x86)
        else()
            set(ECW_ARCH x64)
        endif()
    endif()

    find_library(ECW_LIBRARY NCSEcw
                 HINTS ${ECW_ROOT}/lib/cpp11abi/${ECW_ARCH}/release
                       ${ECW_ROOT}/lib/vc141/${ECW_ARCH})
    mark_as_advanced(ECW_LIBRARY)
    find_package_handle_standard_args(ECW
                                      REQUIRED_VARS ECW_LIBRARY ECW_INCLUDE_DIR
                                      VERSION_VAR ECW_VERSION_STRING)
    if(ECW_FOUND)
        set(ECW_LIBRARIES ${ECW_LIBRARY})
        set(ECW_INCLUDE_DIRS ${ECW_INCLUDE_DIR})
        if(NOT TARGET ECW::ECW_ALL)
            add_library(ECW::ECW_ALL UNKNOWN IMPORTED)
            set(ECW_INTERFACE_COMPILE_DEFINITIONS "HAVE_COMPRESS")
            if( "${ECW_LIBRARY}" MATCHES "NCSEcwS" )
                set(ECW_INTERFACE_COMPILE_DEFINITIONS "${ECW_INTERFACE_COMPILE_DEFINITIONS};NCSECW_STATIC_LIBS")
            endif()
            if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
                list(APPEND ECW_EXTRA_LINK_LIBRARIES "-framework Foundation")
            endif()
            set_target_properties(ECW::ECW_ALL PROPERTIES
                                INTERFACE_INCLUDE_DIRECTORIES "${ECW_INCLUDE_DIRS}"
                                INTERFACE_COMPILE_DEFINITIONS "${ECW_INTERFACE_COMPILE_DEFINITIONS}"
                                IMPORTED_LINK_INTERFACE_LANGUAGES "C"
                                IMPORTED_LOCATION "${ECW_LIBRARY}"
                                INTERFACE_LINK_LIBRARIES "${ECW_EXTRA_LINK_LIBRARIES}")
        endif()
    endif()
elseif(ECW_VERSION_STRING VERSION_GREATER_EQUAL 4.0)
    # We could likely handle other versions, but not done currently
    message(FATAL_ERROR "Only ECW SDK 3.3 and >= 5.5 are supported")
else()
    find_library(ECWJ_LIBRARY libecwj2)
    if(ECWJ_LIBRARY)
        # ECW SDK 3.3 built by gisinternals
        mark_as_advanced(ECWJ_LIBRARY)
        find_package_handle_standard_args(ECW
                                          REQUIRED_VARS ECWJ_LIBRARY ECW_INCLUDE_DIR
                                          VERSION_VAR ECW_VERSION_STRING)
        if(ECW_FOUND)
            set(ECW_LIBRARIES ${ECWJ_LIBRARY})
            set(ECW_INCLUDE_DIRS ${ECW_INCLUDE_DIR})
            if(NOT TARGET ECW::ECW_ALL)
                add_library(ECW::ECW_ALL UNKNOWN IMPORTED)
                set_target_properties(ECW::ECW_ALL PROPERTIES
                                    INTERFACE_INCLUDE_DIRECTORIES "${ECW_INCLUDE_DIRS}"
                                    IMPORTED_LINK_INTERFACE_LANGUAGES "C"
                                    INTERFACE_COMPILE_DEFINITIONS "${ECW_INTERFACE_COMPILE_DEFINITIONS}"
                                    IMPORTED_LOCATION "${ECWJ_LIBRARY}")
            endif()
        endif()
    else()
        # Case of ECW SDK 3.3. We need to find extra libraries than the base NCSEcw.
        find_library(ECW_LIBRARY NCSEcw)
        find_library(ECWnet_LIBRARY NCSCnet)
        find_library(ECWC_LIBRARY NCSEcwC)
        find_library(NCSUtil_LIBRARY NCSUtil)
        mark_as_advanced(ECW_LIBRARY ECWnet_LIBRARY ECWC_LIBRARY NCSUtil_LIBRARY)
        find_package_handle_standard_args(ECW
                                          REQUIRED_VARS ECW_LIBRARY ECWnet_LIBRARY ECWC_LIBRARY NCSUtil_LIBRARY ECW_INCLUDE_DIR
                                          VERSION_VAR ECW_VERSION_STRING)
        if(ECW_FOUND)
            set(ECW_LIBRARIES ${ECW_LIBRARY} ${ECWnet_LIBRARY} ${ECWC_LIBRARY} ${NCSUtil_LIBRARY})
            set(ECW_INCLUDE_DIRS ${ECW_INCLUDE_DIR})
            if(NOT TARGET ECW::ECW)
                add_library(ECW::ECW UNKNOWN IMPORTED)
                set_target_properties(ECW::ECW PROPERTIES
                                    INTERFACE_INCLUDE_DIRECTORIES "${ECW_INCLUDE_DIRS}"
                                    IMPORTED_LINK_INTERFACE_LANGUAGES "C"
                                    IMPORTED_LOCATION "${ECW_LIBRARY}")
            endif()
            if(NOT TARGET ECW::ECWC)
                add_library(ECW::ECWC UNKNOWN IMPORTED)
                set_target_properties(ECW::ECWC PROPERTIES
                                      IMPORTED_LINK_INTERFACE_LANGUAGES "C"
                                      IMPORTED_LOCATION "${ECWC_LIBRARY}")
            endif()
            if(NOT TARGET ECW::ECWnet)
                add_library(ECW::ECWnet UNKNOWN IMPORTED)
                set_target_properties(ECW::ECWnet PROPERTIES
                                      IMPORTED_LINK_INTERFACE_LANGUAGES "C"
                                      IMPORTED_LOCATION "${ECWnet_LIBRARY}")
            endif()
            if(NOT TARGET ECW::NCSUtil)
                add_library(ECW::NCSUtil UNKNOWN IMPORTED)
                set_target_properties(ECW::NCSUtil PROPERTIES
                                      IMPORTED_LINK_INTERFACE_LANGUAGES "C"
                                      IMPORTED_LOCATION "${NCSUtil_LIBRARY}")
            endif()
            if(NOT TARGET ECW::ECW_ALL)
                add_library(ECW::ECW_ALL INTERFACE IMPORTED)
                set_target_properties(ECW::ECW_ALL PROPERTIES
                             INTERFACE_INCLUDE_DIRECTORIES "${ECW_INCLUDE_DIRS}"
                             INTERFACE_LINK_LIBRARIES "ECW::ECW;ECW::ECWC;ECW::ECWnet;ECW::NCSUtil")
            endif()
        endif()
    endif()
endif()