# Custom compiler for qface:
#
# If building a module, use load(ivigenerator_qt_module) instead
#
# Example input:
#   QFACE_SOURCES += my.foo.qface [required]
#   QFACE_MODULE_NAME = my_module_name
#   QFACE_FORMAT = frontend (or backend, simulator... -- defaults to "frontend")
#   QFACE_OUTPUT_DIR = my_output_dir (defaults to current build dir)
#   QFACE_ANNOTATIONS += additional.yaml
#
QT_FOR_CONFIG += ivicore ivicore-private

isEmpty(QFACE_FORMAT): QFACE_FORMAT = frontend
isEmpty(QFACE_OUTPUT_DIR): QFACE_OUTPUT_DIR = $$OUT_PWD
isEmpty(QFACE_SOURCES): error("QFACE_SOURCES must be set!")

!contains(QFACE_SOURCES, .+\\.qface$) {
    error("Invalid qface file provided: The file needs to end with .qface")
}

# See the win32 section, why this is needed
win32-msvc*:!contains(CONFIG, debug_and_release) {
    error("The ivigenerator works only in the debug_and_release configuration on windows")
}

QFACE_PWD = $$dirname(QFACE_SOURCES)
QFACE_ABS_PWD = $$absolute_path($$QFACE_PWD, $$_PRO_FILE_PWD_)
QFACE_FILE = $$basename(QFACE_SOURCES)
QFACE_BASE_NAME = $$replace(QFACE_FILE, .qface, )
QFACE_YAML = $$QFACE_ABS_PWD/$${QFACE_BASE_NAME}.yaml
OTHER_FILES += $$QFACE_ABS_PWD/$$QFACE_FILE

# The 'click' library used by the generator needs to have a utf8 locale setup.
equals(QMAKE_HOST.os, Windows): ENV = chcp 65001 &&
else: ENV = LC_ALL="en_US.UTF-8"

# Detect whether we are using the feature inside the qtivi repository
VIRTUALENV_PATH = $$[QT_HOST_BINS]/ivigenerator/qtivi_qface_virtualenv
INTERNAL_VIRTUALENV_PATH = $$QTIVI_BUILD_ROOT/src/tools/ivigenerator/qtivi_qface_virtualenv
IVI_GENERATOR_PATH = $$[QT_HOST_BINS]/ivigenerator
QTEST_ENVIRONMENT = $$upper($$(QTEST_ENVIRONMENT))

# Try to use the internal virtualenv when building qtivi
# Because of the two stage build of COIN, it might not exist, but the installed version should still be there
QT_FOR_CONFIG *= ivicore-private
!isEmpty(QTIVI_BUILD_ROOT):!equals(QTEST_ENVIRONMENT, CI):!qtConfig(system-ivigenerator) {
    VIRTUALENV_PATH = $$INTERNAL_VIRTUALENV_PATH
    IVI_GENERATOR_PATH = $$QTIVI_ROOT/src/tools/ivigenerator
    equals(QMAKE_HOST.os, Windows): ENV += set IVIGENERATOR_CONFIG="$$system_path($$QTIVI_BUILD_ROOT/src/tools/ivigenerator/.config)" &&
    else: ENV += IVIGENERATOR_CONFIG="$$system_path($$QTIVI_BUILD_ROOT/src/tools/ivigenerator/.config)"
}

qtConfig(system-qface) {
    isEmpty(QMAKE_PYTHON3_LOCATION): error("Couldn't find the QMAKE_PYTHON3_LOCATION variable, Please reconfigure qtivi")
    PYTHON = $$QMAKE_PYTHON3_LOCATION
    !exists($$PYTHON) {
        PYTHON = $$[QT_HOST_BINS]/python3
        equals(QMAKE_HOST.os, Windows): PYTHON = $${PYTHON}.exe
        warning("The Python binary in QMAKE_PYTHON3_LOCATION variable doesn't exist, falling back to use QT_HOST_BINS")
    }
} else {
    equals(QMAKE_HOST.os, Windows) {
        PYTHON = $$VIRTUALENV_PATH/Scripts/python.exe
        # No space between the path and && otherwise python3 adds the space to the path
        ENV += set PYTHONHOME=$$system_path($$VIRTUALENV_PATH)&&
        ENV += set VIRTUAL_ENV=%PYTHONHOME%&&
    } else {
        PYTHON = $$VIRTUALENV_PATH/bin/python
        ENV += LD_LIBRARY_PATH="$$system_path($$VIRTUALENV_PATH/bin)"
        ENV += PYTHONHOME=$$system_path($$VIRTUALENV_PATH)
        ENV += VIRTUAL_ENV=$$system_path($$VIRTUALENV_PATH)
    }
}
IVI_GENERATOR = $$system_quote($$PYTHON) $$IVI_GENERATOR_PATH/generate.py

# TODO make this work with multiple input files, or only support one QFACE_SOURCE
# Although this could be extra_compiler it is a normal EXTRA_TARGET for a reason.
# In the debug_and_release configuration, we want to have the generator executed
# during the run of the meta Makefile to only generate the code once.
PRI = $$QFACE_OUTPUT_DIR/$$lower($${QFACE_BASE_NAME}).pri
IVI_GENERATOR_OPTIONS = --format=$$QFACE_FORMAT --force
!isEmpty(QFACE_MODULE_NAME): IVI_GENERATOR_OPTIONS += --module=$${QFACE_MODULE_NAME}
for (ANNOTATION, QFACE_ANNOTATIONS) {
    file = $$absolute_path($$ANNOTATION, $$_PRO_FILE_PWD_)

    IVI_GENERATOR_OPTIONS += -A $$system_quote($$system_path($$file))
    qface_sources.depends += $$file
    OTHER_FILES += $$file
}

for (IMPORT, QFACE_IMPORT_PATH) {
    dir = $$absolute_path($$IMPORT, $$_PRO_FILE_PWD_)

    IVI_GENERATOR_OPTIONS += -I $$system_quote($$system_path($$dir))
}

# Windows doesn't offer any other way to sleep for a time inside non-interactive scripts
equals(QMAKE_HOST.os, Windows): {
    SLEEP = ping -n 2 127.0.0.1 >nul
    TOUCH = type nul >
} else {
    SLEEP = sleep 1
    TOUCH = touch
}

qface_sources.target = $$relative_path(.stamp-ivigenerator, $$OUT_PWD)
qface_sources.commands += $(DEL_FILE) $$system_quote($$system_path($$OUT_PWD/.stamp-ivigenerator)) &&
qface_sources.commands += $$SLEEP && $$ENV $$system_path($$IVI_GENERATOR) $$IVI_GENERATOR_OPTIONS $$system_quote($$system_path($$QFACE_ABS_PWD/$${QFACE_FILE})) $$system_quote($$system_path($$QFACE_OUTPUT_DIR)) &&
qface_sources.commands += $$TOUCH $$system_quote($$system_path($$OUT_PWD/.stamp-ivigenerator))
qface_sources.depends = $$IVI_GENERATOR_PATH/generate.py
qface_sources.depends += $$QFACE_ABS_PWD/$${QFACE_FILE}
qface_sources.depends += $$files($$IVI_GENERATOR_PATH/templates/common/*)

QMAKE_CLEAN += $$relative_path(.stamp-ivigenerator, $$OUT_PWD)

# Add all templates of the generator format as dependency
QFACE_TEMPLATE_PWD = $$IVI_GENERATOR_PATH/templates/$${QFACE_FORMAT}
exists($$QFACE_TEMPLATE_PWD) {
    qface_sources.depends += $$files($${QFACE_TEMPLATE_PWD}/*)
} else: exists($${QFACE_FORMAT}) {
    qface_sources.depends += $$files($${QFACE_FORMAT}/*)
} else {
    error("Invalid QFACE_FORMAT: Couldn't find the template folder: $$QFACE_TEMPLATE_PWD")
}

# Add the configuration yaml as dependency and to other files
exists($$QFACE_YAML) {
    qface_sources.depends += $$QFACE_YAML
    OTHER_FILES += $$QFACE_YAML
}

!isEmpty(QFACE_HEADERS_OUTPUT_DIR) {
    QFACE_HEADERS_OUTPUT_TARGET = $${QFACE_HEADERS_OUTPUT_DIR}/$$lower($${QFACE_MODULE_NAME})module.h
    qface_headers.target = $$relative_path($$QFACE_HEADERS_OUTPUT_TARGET, $$OUT_PWD)
    qface_headers.commands = $${QMAKE_COPY_FILE} $${QFACE_OUTPUT_DIR}/*.h $${QFACE_HEADERS_OUTPUT_DIR}
    qface_headers.depends = $$relative_path(.stamp-ivigenerator, $$OUT_PWD) $$IVI_GENERATOR_PATH/generate.py
}

# Reevaluate the Makefile after the generation has finished
Makefile.target = Makefile
# The relative_path is needed here as qmake will use a relative_path for the output files
# when using a QMAKE_EXTRA_COMPILER
Makefile.depends = $$relative_path(.stamp-ivigenerator, $$OUT_PWD)

# Make the qmake_all target work for usage inside QtCreator
# Because of the Makefile target the generator is called before the actual Makefile
# is evaluated. This is a problem if the virtualenv is not created yet.
# In this case we create the target with a dependency to the forceRebuild file.
# This file is created during the qmake run and updated once the virtualenv is ready
# and will then cause a rerun of qmake
# When using qface from the system, we don't need to wait for the virtualenv to be setup
!qtConfig(system-qface):!isEmpty(QTIVI_BUILD_ROOT):!exists($$VIRTUALENV_PATH): {
    Makefile.depends = $$shadowed($$IVI_GENERATOR_PATH)/forceRebuild
} else {
    !isEmpty(QFACE_HEADERS_OUTPUT_TARGET) {
        Makefile.depends += $$relative_path($$QFACE_HEADERS_OUTPUT_TARGET, $$OUT_PWD)
        QMAKE_EXTRA_TARGETS += qface_headers
    }
}


# After the generation, this should exists and qmake can create the correct build tree
exists($$PRI) {
    # save the state and reset for SOURCES, HEADERS and OTHER_FILES
    # Afterwards add all autogenerated files to the 'make clean' target
    SOURCES_ORIG = $$SOURCES
    SOURCES =
    HEADERS_ORIG = $$HEADERS
    HEADERS =
    OTHER_FILES_ORIG = $$OTHER_FILES
    OTHER_FILES =
    include($$PRI)
    QMAKE_CLEAN += $$SOURCES
    QMAKE_CLEAN += $$HEADERS
    QMAKE_CLEAN += $$OTHER_FILES
    QMAKE_CLEAN += $$PRI
    SOURCES += $$SOURCES_ORIG
    HEADERS += $$HEADERS_ORIG
    OTHER_FILES += $$OTHER_FILES_ORIG
}

QMAKE_EXTRA_TARGETS += Makefile qface_sources

# NMAKE doesn't support the Makefile target to call qmake and reevaluate itself
# Because of that, the autogeneration is not started at all and if started
# qmake is not run and the Makefile revaluated...
# To workaround this, we depend on debug_and_release as a meta Makefile is generated
# where we can envorce the run of the generator and qmake.
# Afterwards the sub makefiles are read (Makefile.debug/release), which have been
# regenerated before starting NMAKE on them.
win32-msvc* {
    qmake.depends = $$relative_path(.stamp-ivigenerator, $$OUT_PWD)

    debug.depends = qmake
    debug-make_first.depends = qmake
    debug-all.depends = qmake
    release.depends = qmake
    release-make_first.depends = qmake
    release-all.depends = qmake
    QMAKE_EXTRA_TARGETS += debug debug-make_first debug-all \
                           release release-make_first release-all \
                           qmake
}