# Copyright (C) Valentin V. Bartenev
# Copyright (C) Igor Sysoev
# Copyright (C) NGINX, Inc.


shift

for nxt_option; do

    case "$nxt_option" in
        -*=*) value=`echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
           *) value="" ;;
    esac

    case "$nxt_option" in

        --config=*)    NXT_PYTHON_CONFIG="$value"                            ;;
        --module=*)    NXT_PYTHON_MODULE="$value"                            ;;
        --lib-path=*)  NXT_PYTHON_LIB_PATH="$value"                          ;;

        --help)
            cat << END

    --config=FILE         set python-config filename
    --module=NAME         set unit python module name
    --lib-path=DIRECTORY  set directory path to libpython.so library

END
            exit 0
        ;;

        *)
            echo
            echo $0: error: invalid Python option \"$nxt_option\"
            echo
            exit 1
        ;;
    esac

done


if [ ! -f $NXT_AUTOCONF_DATA ]; then
   echo
   echo Please run common $0 before configuring module \"$nxt_module\".
   echo
   exit 1
fi

. $NXT_AUTOCONF_DATA


NXT_PYTHON_CONFIG=${NXT_PYTHON_CONFIG=python-config}
NXT_PYTHON=${NXT_PYTHON_CONFIG%-config*}
NXT_PYTHON_MODULE=${NXT_PYTHON_MODULE=${NXT_PYTHON##*/}}
NXT_PYTHON_LIB_PATH=${NXT_PYTHON_LIB_PATH=}


$echo "configuring Python module"
$echo "configuring Python module ..." >> $NXT_AUTOCONF_ERR

nxt_found=no

if /bin/sh -c "$NXT_PYTHON_CONFIG --prefix" >> $NXT_AUTOCONF_ERR 2>&1; then

    if ${NXT_PYTHON_CONFIG} --embed >/dev/null 2>&1; then
        NXT_PYTHON_CONFIG="${NXT_PYTHON_CONFIG} --embed"
    fi

    NXT_PYTHON_INCLUDE=`${NXT_PYTHON_CONFIG} --includes`
    NXT_PYTHON_LIBS=`${NXT_PYTHON_CONFIG} --ldflags`

    if [ "$NXT_PYTHON_LIB_PATH" != "" ]; then
        # "python-config --ldflags" may not contain path to libpython.
        NXT_PYTHON_LDFLAGS="-L$NXT_PYTHON_LIB_PATH -Wl,-rpath,$NXT_PYTHON_LIB_PATH"
    else
        NXT_PYTHON_LDFLAGS=""
    fi

    nxt_feature="Python"
    nxt_feature_name=""
    nxt_feature_run=no
    nxt_feature_incs="${NXT_PYTHON_INCLUDE}"
    nxt_feature_libs="${NXT_PYTHON_LIBS} $NXT_PYTHON_LDFLAGS"
    nxt_feature_test="
        #include <Python.h>

        int main(void) {
            Py_Initialize();
            return 0;
        }"

    . auto/feature

else
    $echo "checking for Python ... not found"
fi

if [ $nxt_found = no ]; then
    $echo
    $echo $0: error: no Python found.
    $echo
    exit 1;
fi


nxt_feature="Python version"
nxt_feature_name=""
nxt_feature_run=value
nxt_feature_incs="${NXT_PYTHON_INCLUDE}"
nxt_feature_libs="${NXT_PYTHON_LIBS} $NXT_PYTHON_LDFLAGS"
nxt_feature_test="
    #include <Python.h>
    #include <stdio.h>

    int main(void) {
        printf(\"%s\", PY_VERSION);
        return 0;
    }"

. auto/feature


if grep ^$NXT_PYTHON_MODULE: $NXT_MAKEFILE 2>&1 > /dev/null; then
    $echo
    $echo $0: error: duplicate \"$NXT_PYTHON_MODULE\" module configured.
    $echo
    exit 1;
fi


NXT_PYTHON_MOUNTS_HEADER=nxt_${NXT_PYTHON_MODULE}_mounts.h

$NXT_PYTHON -c 'import os.path
import sys
pyver = "python" + str(sys.version_info[0]) + "." + str(sys.version_info[1])

print("static const nxt_fs_mount_t  nxt_python_mounts[] = {")

pattern = "{(u_char *) \"%s\", (u_char *) \"%s\", NXT_FS_BIND, (u_char *) \"bind\", 0, NULL, 1, 1},"
base = None
for p in sys.path:
    if len(p) > 0:
        if os.path.basename(p) == pyver:
            base = p

if base is None:
    raise Exception("failed to compute sys.path mount points")

print(pattern % (base, base))

for p in sys.path:
    if len(p) > 0:
        if not p.startswith(base):
            print(pattern % (p, p))

print("};\n\n")

' > $NXT_BUILD_DIR/include/$NXT_PYTHON_MOUNTS_HEADER


$echo " + Python module: ${NXT_PYTHON_MODULE}.unit.so"

. auto/cc/deps

$echo >> $NXT_MAKEFILE

NXT_PYTHON_MODULE_SRCS=" \
    src/python/nxt_python.c \
    src/python/nxt_python_asgi.c \
    src/python/nxt_python_asgi_http.c \
    src/python/nxt_python_asgi_lifespan.c \
    src/python/nxt_python_asgi_str.c \
    src/python/nxt_python_asgi_websocket.c \
    src/python/nxt_python_wsgi.c \
"

# The python module object files.

nxt_objs=$NXT_BUILD_DIR/src/nxt_unit.o

for nxt_src in $NXT_PYTHON_MODULE_SRCS; do

    nxt_obj=${nxt_src%.c}-$NXT_PYTHON_MODULE.o
    nxt_dep=${nxt_src%.c}-$NXT_PYTHON_MODULE.dep
    nxt_dep_flags=`nxt_gen_dep_flags`
    nxt_dep_post=`nxt_gen_dep_post`
    nxt_objs="$nxt_objs $NXT_BUILD_DIR/$nxt_obj"

    cat << END >> $NXT_MAKEFILE

$NXT_BUILD_DIR/$nxt_obj:	$nxt_src $NXT_VERSION_H
	mkdir -p $NXT_BUILD_DIR/src/python
	\$(CC) -c \$(CFLAGS) -DNXT_PYTHON_MOUNTS_H=\"$NXT_PYTHON_MOUNTS_HEADER\" \\
           \$(NXT_INCS) $NXT_PYTHON_INCLUDE \\
	$nxt_dep_flags \\
	-o $NXT_BUILD_DIR/$nxt_obj $nxt_src
	$nxt_dep_post

-include $NXT_BUILD_DIR/$nxt_dep

END

done


cat << END >> $NXT_MAKEFILE

.PHONY: ${NXT_PYTHON_MODULE}
.PHONY: ${NXT_PYTHON_MODULE}-install
.PHONY: ${NXT_PYTHON_MODULE}-uninstall

all: ${NXT_PYTHON_MODULE}

${NXT_PYTHON_MODULE}:	$NXT_BUILD_DIR/lib/unit/modules/${NXT_PYTHON_MODULE}.unit.so

$NXT_BUILD_DIR/lib/unit/modules/${NXT_PYTHON_MODULE}.unit.so:	$nxt_objs
	\$(NXT_MODULE_LINK) -o \$@ \\
	$nxt_objs $NXT_PYTHON_LIBS $NXT_PYTHON_LDFLAGS $NXT_LD_OPT


install: ${NXT_PYTHON_MODULE}-install

${NXT_PYTHON_MODULE}-install: ${NXT_PYTHON_MODULE} install-check
	install -d \$(DESTDIR)$NXT_MODULESDIR
	install -p $NXT_BUILD_DIR/lib/unit/modules/${NXT_PYTHON_MODULE}.unit.so \\
		\$(DESTDIR)$NXT_MODULESDIR/


uninstall: ${NXT_PYTHON_MODULE}-uninstall

${NXT_PYTHON_MODULE}-uninstall:
	rm -f \$(DESTDIR)$NXT_MODULESDIR/${NXT_PYTHON_MODULE}.unit.so
	@rmdir -p \$(DESTDIR)$NXT_MODULESDIR 2>/dev/null || true

END