#!/usr/bin/python3
# -*- coding: utf-8 -*-
#
# Copyright © 2018 Endless Mobile, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA  02110-1301  USA

"""Integration tests for glib-mkenums utility."""

import collections
import os
import shutil
import subprocess
import sys
import tempfile
import textwrap
import unittest

import taptestrunner


Result = collections.namedtuple("Result", ("info", "out", "err", "subs"))


class TestMkenums(unittest.TestCase):
    """Integration test for running glib-mkenums.

    This can be run when installed or uninstalled. When uninstalled, it
    requires G_TEST_BUILDDIR and G_TEST_SRCDIR to be set.

    The idea with this test harness is to test the glib-mkenums utility, its
    handling of command line arguments, its exit statuses, and its handling of
    various C source codes. In future we could split the core glib-mkenums
    parsing and generation code out into a library and unit test that, and
    convert this test to just check command line behaviour.
    """

    # Track the cwd, we want to back out to that to clean up our tempdir
    cwd = ""
    rspfile = False

    def setUp(self):
        self.timeout_seconds = 10  # seconds per test
        self.tmpdir = tempfile.TemporaryDirectory()
        self.cwd = os.getcwd()
        os.chdir(self.tmpdir.name)
        print("tmpdir:", self.tmpdir.name)
        if "G_TEST_BUILDDIR" in os.environ:
            self.__mkenums = os.path.join(
                os.environ["G_TEST_BUILDDIR"], "..", "glib-mkenums"
            )
        else:
            self.__mkenums = shutil.which("glib-mkenums")
        print("rspfile: {}, mkenums:".format(self.rspfile), self.__mkenums)

    def tearDown(self):
        os.chdir(self.cwd)
        self.tmpdir.cleanup()

    def _write_rspfile(self, argv):
        import shlex

        with tempfile.NamedTemporaryFile(
            dir=self.tmpdir.name, mode="w", delete=False
        ) as f:
            contents = " ".join([shlex.quote(arg) for arg in argv])
            print("Response file contains:", contents)
            f.write(contents)
            f.flush()
            return f.name

    def runMkenums(self, *args):
        if self.rspfile:
            rspfile = self._write_rspfile(args)
            args = ["@" + rspfile]
        argv = [self.__mkenums]

        # shebang lines are not supported on native
        # Windows consoles
        if os.name == "nt":
            argv.insert(0, sys.executable)

        argv.extend(args)
        print("Running:", argv)

        env = os.environ.copy()
        env["LC_ALL"] = "C.UTF-8"
        print("Environment:", env)

        # We want to ensure consistent line endings...
        info = subprocess.run(
            argv,
            timeout=self.timeout_seconds,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            env=env,
            universal_newlines=True,
        )
        info.check_returncode()
        out = info.stdout.strip()
        err = info.stderr.strip()

        # Known substitutions for standard boilerplate
        subs = {
            "standard_top_comment": "This file is generated by glib-mkenums, do not modify "
            "it. This code is licensed under the same license as the "
            "containing project. Note that it links to GLib, so must "
            "comply with the LGPL linking clauses.",
            "standard_bottom_comment": "Generated data ends here",
        }

        result = Result(info, out, err, subs)

        print("Output:", result.out)
        return result

    def runMkenumsWithTemplate(self, template_contents, *args):
        with tempfile.NamedTemporaryFile(
            dir=self.tmpdir.name, suffix=".template", delete=False
        ) as template_file:
            # Write out the template.
            template_file.write(template_contents.encode("utf-8"))
            print(template_file.name + ":", template_contents)
            template_file.flush()

            return self.runMkenums("--template", template_file.name, *args)

    def runMkenumsWithAllSubstitutions(self, *args):
        """Run glib-mkenums with a template which outputs all substitutions."""
        template_contents = """
/*** BEGIN file-header ***/
file-header
/*** END file-header ***/

/*** BEGIN file-production ***/
file-production
filename: @filename@
basename: @basename@
/*** END file-production ***/

/*** BEGIN enumeration-production ***/
enumeration-production
EnumName: @EnumName@
enum_name: @enum_name@
ENUMNAME: @ENUMNAME@
ENUMSHORT: @ENUMSHORT@
ENUMPREFIX: @ENUMPREFIX@
enumsince: @enumsince@
type: @type@
Type: @Type@
TYPE: @TYPE@
/*** END enumeration-production ***/

/*** BEGIN value-header ***/
value-header
EnumName: @EnumName@
enum_name: @enum_name@
ENUMNAME: @ENUMNAME@
ENUMSHORT: @ENUMSHORT@
ENUMPREFIX: @ENUMPREFIX@
enumsince: @enumsince@
type: @type@
Type: @Type@
TYPE: @TYPE@
/*** END value-header ***/

/*** BEGIN value-production ***/
value-production
VALUENAME: @VALUENAME@
valuenick: @valuenick@
valuenum: @valuenum@
type: @type@
Type: @Type@
TYPE: @TYPE@
/*** END value-production ***/

/*** BEGIN value-tail ***/
value-tail
EnumName: @EnumName@
enum_name: @enum_name@
ENUMNAME: @ENUMNAME@
ENUMSHORT: @ENUMSHORT@
ENUMPREFIX: @ENUMPREFIX@
enumsince: @enumsince@
type: @type@
Type: @Type@
TYPE: @TYPE@
/*** END value-tail ***/

/*** BEGIN comment ***/
comment
comment: @comment@
/*** END comment ***/

/*** BEGIN file-tail ***/
file-tail
/*** END file-tail ***/
"""
        return self.runMkenumsWithTemplate(template_contents, *args)

    def runMkenumsWithHeader(self, h_contents, encoding="utf-8"):
        with tempfile.NamedTemporaryFile(
            dir=self.tmpdir.name, suffix=".h", delete=False
        ) as h_file:
            # Write out the header to be scanned.
            h_file.write(h_contents.encode(encoding))
            print(h_file.name + ":", h_contents)
            h_file.flush()

            # Run glib-mkenums with a template which outputs all substitutions.
            result = self.runMkenumsWithAllSubstitutions(h_file.name)

            # Known substitutions for generated filenames.
            result.subs.update(
                {"filename": h_file.name, "basename": os.path.basename(h_file.name)}
            )

            return result

    def assertSingleEnum(
        self,
        result,
        enum_name_camel,
        enum_name_lower,
        enum_name_upper,
        enum_name_short,
        enum_prefix,
        enum_since,
        type_lower,
        type_camel,
        type_upper,
        value_name,
        value_nick,
        value_num,
    ):
        """Assert that out (from runMkenumsWithHeader()) contains a single
           enum and value matching the given arguments."""
        subs = dict(
            {
                "enum_name_camel": enum_name_camel,
                "enum_name_lower": enum_name_lower,
                "enum_name_upper": enum_name_upper,
                "enum_name_short": enum_name_short,
                "enum_prefix": enum_prefix,
                "enum_since": enum_since,
                "type_lower": type_lower,
                "type_camel": type_camel,
                "type_upper": type_upper,
                "value_name": value_name,
                "value_nick": value_nick,
                "value_num": value_num,
            },
            **result.subs
        )

        self.assertEqual(
            """
comment
comment: {standard_top_comment}


file-header
file-production
filename: {filename}
basename: {basename}
enumeration-production
EnumName: {enum_name_camel}
enum_name: {enum_name_lower}
ENUMNAME: {enum_name_upper}
ENUMSHORT: {enum_name_short}
ENUMPREFIX: {enum_prefix}
enumsince: {enum_since}
type: {type_lower}
Type: {type_camel}
TYPE: {type_upper}
value-header
EnumName: {enum_name_camel}
enum_name: {enum_name_lower}
ENUMNAME: {enum_name_upper}
ENUMSHORT: {enum_name_short}
ENUMPREFIX: {enum_prefix}
enumsince: {enum_since}
type: {type_lower}
Type: {type_camel}
TYPE: {type_upper}
value-production
VALUENAME: {value_name}
valuenick: {value_nick}
valuenum: {value_num}
type: {type_lower}
Type: {type_camel}
TYPE: {type_upper}
value-tail
EnumName: {enum_name_camel}
enum_name: {enum_name_lower}
ENUMNAME: {enum_name_upper}
ENUMSHORT: {enum_name_short}
ENUMPREFIX: {enum_prefix}
enumsince: {enum_since}
type: {type_lower}
Type: {type_camel}
TYPE: {type_upper}
file-tail

comment
comment: {standard_bottom_comment}
""".format(
                **subs
            ).strip(),
            result.out,
        )

    def test_help(self):
        """Test the --help argument."""
        result = self.runMkenums("--help")
        self.assertIn("usage: glib-mkenums", result.out)

    def test_no_args(self):
        """Test running with no arguments at all."""
        result = self.runMkenums()
        self.assertEqual("", result.err)
        self.assertEqual(
            """/* {standard_top_comment} */


/* {standard_bottom_comment} */""".format(
                **result.subs
            ),
            result.out.strip(),
        )

    def test_empty_template(self):
        """Test running with an empty template and no header files."""
        result = self.runMkenumsWithTemplate("")
        self.assertEqual("", result.err)
        self.assertEqual(
            """/* {standard_top_comment} */


/* {standard_bottom_comment} */""".format(
                **result.subs
            ),
            result.out.strip(),
        )

    def test_no_headers(self):
        """Test running with a complete template, but no header files."""
        result = self.runMkenumsWithAllSubstitutions()
        self.assertEqual("", result.err)
        self.assertEqual(
            """
comment
comment: {standard_top_comment}


file-header
file-tail

comment
comment: {standard_bottom_comment}
""".format(
                **result.subs
            ).strip(),
            result.out,
        )

    def test_empty_header(self):
        """Test an empty header."""
        result = self.runMkenumsWithHeader("")
        self.assertEqual("", result.err)
        self.assertEqual(
            """
comment
comment: {standard_top_comment}


file-header
file-tail

comment
comment: {standard_bottom_comment}
""".format(
                **result.subs
            ).strip(),
            result.out,
        )

    def test_enum_name(self):
        """Test typedefs with an enum and a typedef name. Bug #794506."""
        h_contents = """
        typedef enum _SomeEnumIdentifier {
          ENUM_VALUE
        } SomeEnumIdentifier;
        """
        result = self.runMkenumsWithHeader(h_contents)
        self.assertEqual("", result.err)
        self.assertSingleEnum(
            result,
            "SomeEnumIdentifier",
            "some_enum_identifier",
            "SOME_ENUM_IDENTIFIER",
            "ENUM_IDENTIFIER",
            "SOME",
            "",
            "enum",
            "Enum",
            "ENUM",
            "ENUM_VALUE",
            "value",
            "0",
        )

    def test_non_utf8_encoding(self):
        """Test source files with non-UTF-8 encoding. Bug #785113."""
        h_contents = """
        /* Copyright © La Peña */
        typedef enum {
          ENUM_VALUE
        } SomeEnumIdentifier;
        """
        result = self.runMkenumsWithHeader(h_contents, encoding="iso-8859-1")
        self.assertIn("WARNING: UnicodeWarning: ", result.err)
        self.assertSingleEnum(
            result,
            "SomeEnumIdentifier",
            "some_enum_identifier",
            "SOME_ENUM_IDENTIFIER",
            "ENUM_IDENTIFIER",
            "SOME",
            "",
            "enum",
            "Enum",
            "ENUM",
            "ENUM_VALUE",
            "value",
            "0",
        )

    def test_reproducible(self):
        """Test builds are reproducible regardless of file ordering.
        Bug #691436."""
        template_contents = "template"

        h_contents1 = """
        typedef enum {
          FIRST,
        } Header1;
        """

        h_contents2 = """
        typedef enum {
          SECOND,
        } Header2;
        """

        with tempfile.NamedTemporaryFile(
            dir=self.tmpdir.name, suffix="1.h", delete=False
        ) as h_file1, tempfile.NamedTemporaryFile(
            dir=self.tmpdir.name, suffix="2.h", delete=False
        ) as h_file2:
            # Write out the headers.
            h_file1.write(h_contents1.encode("utf-8"))
            h_file2.write(h_contents2.encode("utf-8"))

            h_file1.flush()
            h_file2.flush()

            # Run glib-mkenums with the headers in one order, and then again
            # in another order.
            result1 = self.runMkenumsWithTemplate(
                template_contents, h_file1.name, h_file2.name
            )
            self.assertEqual("", result1.err)

            result2 = self.runMkenumsWithTemplate(
                template_contents, h_file2.name, h_file1.name
            )
            self.assertEqual("", result2.err)

            # The output should be the same.
            self.assertEqual(result1.out, result2.out)

    def test_no_nick(self):
        """Test trigraphs with a desc but no nick. Issue #1360."""
        h_contents = """
        typedef enum {
          GEGL_SAMPLER_NEAREST = 0,   /*< desc="nearest"      >*/
        } GeglSamplerType;
        """
        result = self.runMkenumsWithHeader(h_contents)
        self.assertEqual("", result.err)
        self.assertSingleEnum(
            result,
            "GeglSamplerType",
            "gegl_sampler_type",
            "GEGL_SAMPLER_TYPE",
            "SAMPLER_TYPE",
            "GEGL",
            "",
            "enum",
            "Enum",
            "ENUM",
            "GEGL_SAMPLER_NEAREST",
            "nearest",
            "0",
        )

    def test_filename_basename_in_fhead_ftail(self):
        template_contents = """
/*** BEGIN file-header ***/
file-header
filename: @filename@
basename: @basename@
/*** END file-header ***/

/*** BEGIN comment ***/
comment
comment: @comment@
/*** END comment ***/

/*** BEGIN file-tail ***/
file-tail
filename: @filename@
basename: @basename@
/*** END file-tail ***/"""
        result = self.runMkenumsWithTemplate(template_contents)
        self.assertEqual(
            textwrap.dedent(
                """
                WARNING: @filename@ used in file-header section.
                WARNING: @basename@ used in file-header section.
                WARNING: @filename@ used in file-tail section.
                WARNING: @basename@ used in file-tail section.
                """
            ).strip(),
            result.err,
        )
        self.assertEqual(
            """
comment
comment: {standard_top_comment}


file-header
filename: @filename@
basename: @basename@
file-tail
filename: @filename@
basename: @basename@

comment
comment: {standard_bottom_comment}
""".format(
                **result.subs
            ).strip(),
            result.out,
        )

    def test_since(self):
        """Test user-provided 'since' version handling
        https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1492"""
        h_contents = """
        typedef enum { /*< since=1.0 >*/
            QMI_WMS_MESSAGE_PROTOCOL_CDMA = 0,
        } QmiWmsMessageProtocol;
        """
        result = self.runMkenumsWithHeader(h_contents)
        self.assertEqual("", result.err)
        self.assertSingleEnum(
            result,
            "QmiWmsMessageProtocol",
            "qmi_wms_message_protocol",
            "QMI_WMS_MESSAGE_PROTOCOL",
            "WMS_MESSAGE_PROTOCOL",
            "QMI",
            "1.0",
            "enum",
            "Enum",
            "ENUM",
            "QMI_WMS_MESSAGE_PROTOCOL_CDMA",
            "cdma",
            "0",
        )

    def test_enum_private_public(self):
        """Test private/public enums. Bug #782162."""
        h_contents1 = """
        typedef enum {
          ENUM_VALUE_PUBLIC1,
          /*< private >*/
          ENUM_VALUE_PRIVATE,
        } SomeEnumA
        """

        h_contents2 = """
        typedef enum {
          /*< private >*/
          ENUM_VALUE_PRIVATE,
          /*< public >*/
          ENUM_VALUE_PUBLIC2,
        } SomeEnumB;
        """

        result = self.runMkenumsWithHeader(h_contents1)
        self.maxDiff = None
        self.assertEqual("", result.err)
        self.assertSingleEnum(
            result,
            "SomeEnumA",
            "some_enum_a",
            "SOME_ENUM_A",
            "ENUM_A",
            "SOME",
            "",
            "enum",
            "Enum",
            "ENUM",
            "ENUM_VALUE_PUBLIC1",
            "public1",
            "0",
        )
        result = self.runMkenumsWithHeader(h_contents2)
        self.assertEqual("", result.err)
        self.assertSingleEnum(
            result,
            "SomeEnumB",
            "some_enum_b",
            "SOME_ENUM_B",
            "ENUM_B",
            "SOME",
            "",
            "enum",
            "Enum",
            "ENUM",
            "ENUM_VALUE_PUBLIC2",
            "public2",
            "0",
        )

    def test_available_in(self):
        """Test GLIB_AVAILABLE_ENUMERATOR_IN_2_68 handling
        https://gitlab.gnome.org/GNOME/glib/-/issues/2327"""
        h_contents = """
        typedef enum {
          G_DBUS_SERVER_FLAGS_AUTHENTICATION_REQUIRE_SAME_USER GLIB_AVAILABLE_ENUMERATOR_IN_2_68 = (1<<2)
        } GDBusServerFlags;
        """
        result = self.runMkenumsWithHeader(h_contents)
        self.assertEqual("", result.err)
        self.assertSingleEnum(
            result,
            "GDBusServerFlags",
            "g_dbus_server_flags",
            "G_DBUS_SERVER_FLAGS",
            "DBUS_SERVER_FLAGS",
            "G",
            "",
            "flags",
            "Flags",
            "FLAGS",
            "G_DBUS_SERVER_FLAGS_AUTHENTICATION_REQUIRE_SAME_USER",
            "user",
            "4",
        )

    def test_deprecated_in(self):
        """Test GLIB_DEPRECATED_ENUMERATOR_IN_2_68 handling
        https://gitlab.gnome.org/GNOME/glib/-/issues/2327"""
        h_contents = """
        typedef enum {
          G_DBUS_SERVER_FLAGS_AUTHENTICATION_REQUIRE_SAME_USER GLIB_DEPRECATED_ENUMERATOR_IN_2_68 = (1<<2)
        } GDBusServerFlags;
        """
        result = self.runMkenumsWithHeader(h_contents)
        self.assertEqual("", result.err)
        self.assertSingleEnum(
            result,
            "GDBusServerFlags",
            "g_dbus_server_flags",
            "G_DBUS_SERVER_FLAGS",
            "DBUS_SERVER_FLAGS",
            "G",
            "",
            "flags",
            "Flags",
            "FLAGS",
            "G_DBUS_SERVER_FLAGS_AUTHENTICATION_REQUIRE_SAME_USER",
            "user",
            "4",
        )

    def test_deprecated_in_for(self):
        """Test GLIB_DEPRECATED_ENUMERATOR_IN_2_68_FOR() handling
        https://gitlab.gnome.org/GNOME/glib/-/issues/2327"""
        h_contents = """
        typedef enum {
          G_DBUS_SERVER_FLAGS_AUTHENTICATION_REQUIRE_SAME_USER GLIB_DEPRECATED_ENUMERATOR_IN_2_68_FOR(G_DBUS_SERVER_FLAGS_AUTHENTICATION_REQUIRE_SAME_USER2) = (1<<2)
        } GDBusServerFlags;
        """
        result = self.runMkenumsWithHeader(h_contents)
        self.assertEqual("", result.err)
        self.assertSingleEnum(
            result,
            "GDBusServerFlags",
            "g_dbus_server_flags",
            "G_DBUS_SERVER_FLAGS",
            "DBUS_SERVER_FLAGS",
            "G",
            "",
            "flags",
            "Flags",
            "FLAGS",
            "G_DBUS_SERVER_FLAGS_AUTHENTICATION_REQUIRE_SAME_USER",
            "user",
            "4",
        )


class TestRspMkenums(TestMkenums):
    """Run all tests again in @rspfile mode"""

    rspfile = True


if __name__ == "__main__":
    unittest.main(testRunner=taptestrunner.TAPTestRunner())