# -*- coding: utf-8 -*-
# SPDX-License-Identifier:	GPL-2.0+
#
# Copyright 2017 Google, Inc
#

import contextlib
import os
import re
import shutil
import sys
import tempfile
import unittest

from io import StringIO

from patman import gitutil
from patman import patchstream
from patman import settings
from patman import tools


@contextlib.contextmanager
def capture():
    import sys
    oldout,olderr = sys.stdout, sys.stderr
    try:
        out=[StringIO(), StringIO()]
        sys.stdout,sys.stderr = out
        yield out
    finally:
        sys.stdout,sys.stderr = oldout, olderr
        out[0] = out[0].getvalue()
        out[1] = out[1].getvalue()


class TestFunctional(unittest.TestCase):
    def setUp(self):
        self.tmpdir = tempfile.mkdtemp(prefix='patman.')

    def tearDown(self):
        shutil.rmtree(self.tmpdir)

    @staticmethod
    def GetPath(fname):
        return os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),
                            'test', fname)

    @classmethod
    def GetText(self, fname):
        return open(self.GetPath(fname), encoding='utf-8').read()

    @classmethod
    def GetPatchName(self, subject):
        fname = re.sub('[ :]', '-', subject)
        return fname.replace('--', '-')

    def CreatePatchesForTest(self, series):
        cover_fname = None
        fname_list = []
        for i, commit in enumerate(series.commits):
            clean_subject = self.GetPatchName(commit.subject)
            src_fname = '%04d-%s.patch' % (i + 1, clean_subject[:52])
            fname = os.path.join(self.tmpdir, src_fname)
            shutil.copy(self.GetPath(src_fname), fname)
            fname_list.append(fname)
        if series.get('cover'):
            src_fname = '0000-cover-letter.patch'
            cover_fname = os.path.join(self.tmpdir, src_fname)
            fname = os.path.join(self.tmpdir, src_fname)
            shutil.copy(self.GetPath(src_fname), fname)

        return cover_fname, fname_list

    def testBasic(self):
        """Tests the basic flow of patman

        This creates a series from some hard-coded patches build from a simple
        tree with the following metadata in the top commit:

            Series-to: u-boot
            Series-prefix: RFC
            Series-cc: Stefan Brüns <stefan.bruens@rwth-aachen.de>
            Cover-letter-cc: Lord Mëlchett <clergy@palace.gov>
            Series-version: 3
            Patch-cc: fred
            Series-process-log: sort, uniq
            Series-changes: 4
            - Some changes
            - Multi
              line
              change

            Commit-changes: 2
            - Changes only for this commit

            Cover-changes: 4
            - Some notes for the cover letter

            Cover-letter:
            test: A test patch series
            This is a test of how the cover
            letter
            works
            END

        and this in the first commit:

            Commit-changes: 2
            - second revision change

            Series-notes:
            some notes
            about some things
            from the first commit
            END

            Commit-notes:
            Some notes about
            the first commit
            END

        with the following commands:

           git log -n2 --reverse >/path/to/tools/patman/test/test01.txt
           git format-patch --subject-prefix RFC --cover-letter HEAD~2
           mv 00* /path/to/tools/patman/test

        It checks these aspects:
            - git log can be processed by patchstream
            - emailing patches uses the correct command
            - CC file has information on each commit
            - cover letter has the expected text and subject
            - each patch has the correct subject
            - dry-run information prints out correctly
            - unicode is handled correctly
            - Series-to, Series-cc, Series-prefix, Cover-letter
            - Cover-letter-cc, Series-version, Series-changes, Series-notes
            - Commit-notes
        """
        process_tags = True
        ignore_bad_tags = True
        stefan = b'Stefan Br\xc3\xbcns <stefan.bruens@rwth-aachen.de>'.decode('utf-8')
        rick = 'Richard III <richard@palace.gov>'
        mel = b'Lord M\xc3\xablchett <clergy@palace.gov>'.decode('utf-8')
        ed = b'Lond Edmund Blackadd\xc3\xabr <weasel@blackadder.org'.decode('utf-8')
        fred = 'Fred Bloggs <f.bloggs@napier.net>'
        add_maintainers = [stefan, rick]
        dry_run = True
        in_reply_to = mel
        count = 2
        settings.alias = {
                'fdt': ['simon'],
                'u-boot': ['u-boot@lists.denx.de'],
                'simon': [ed],
                'fred': [fred],
        }

        text = self.GetText('test01.txt')
        series = patchstream.GetMetaDataForTest(text)
        cover_fname, args = self.CreatePatchesForTest(series)
        with capture() as out:
            patchstream.FixPatches(series, args)
            if cover_fname and series.get('cover'):
                patchstream.InsertCoverLetter(cover_fname, series, count)
            series.DoChecks()
            cc_file = series.MakeCcFile(process_tags, cover_fname,
                                        not ignore_bad_tags, add_maintainers,
                                        None)
            cmd = gitutil.EmailPatches(series, cover_fname, args,
                    dry_run, not ignore_bad_tags, cc_file,
                    in_reply_to=in_reply_to, thread=None)
            series.ShowActions(args, cmd, process_tags)
        cc_lines = open(cc_file, encoding='utf-8').read().splitlines()
        os.remove(cc_file)

        lines = out[0].splitlines()
        self.assertEqual('Cleaned %s patches' % len(series.commits), lines[0])
        self.assertEqual('Change log missing for v2', lines[1])
        self.assertEqual('Change log missing for v3', lines[2])
        self.assertEqual('Change log for unknown version v4', lines[3])
        self.assertEqual("Alias 'pci' not found", lines[4])
        self.assertIn('Dry run', lines[5])
        self.assertIn('Send a total of %d patches' % count, lines[7])
        line = 8
        for i, commit in enumerate(series.commits):
            self.assertEqual('   %s' % args[i], lines[line + 0])
            line += 1
            while 'Cc:' in lines[line]:
                line += 1
        self.assertEqual('To:	  u-boot@lists.denx.de', lines[line])
        self.assertEqual('Cc:	  %s' % tools.FromUnicode(stefan),
                         lines[line + 1])
        self.assertEqual('Version:  3', lines[line + 2])
        self.assertEqual('Prefix:\t  RFC', lines[line + 3])
        self.assertEqual('Cover: 4 lines', lines[line + 4])
        line += 5
        self.assertEqual('      Cc:  %s' % fred, lines[line + 0])
        self.assertEqual('      Cc:  %s' % tools.FromUnicode(ed),
                         lines[line + 1])
        self.assertEqual('      Cc:  %s' % tools.FromUnicode(mel),
                         lines[line + 2])
        self.assertEqual('      Cc:  %s' % rick, lines[line + 3])
        expected = ('Git command: git send-email --annotate '
                    '--in-reply-to="%s" --to "u-boot@lists.denx.de" '
                    '--cc "%s" --cc-cmd "%s --cc-cmd %s" %s %s'
                    % (in_reply_to, stefan, sys.argv[0], cc_file, cover_fname,
                       ' '.join(args)))
        line += 4
        self.assertEqual(expected, tools.ToUnicode(lines[line]))

        self.assertEqual(('%s %s\0%s' % (args[0], rick, stefan)),
                         tools.ToUnicode(cc_lines[0]))
        self.assertEqual(('%s %s\0%s\0%s\0%s' % (args[1], fred, ed, rick,
                                     stefan)), tools.ToUnicode(cc_lines[1]))

        expected = '''
This is a test of how the cover
letter
works

some notes
about some things
from the first commit

Changes in v4:
- Multi
  line
  change
- Some changes
- Some notes for the cover letter

Simon Glass (2):
  pci: Correct cast for sandbox
  fdt: Correct cast for sandbox in fdtdec_setup_mem_size_base()

 cmd/pci.c                   | 3 ++-
 fs/fat/fat.c                | 1 +
 lib/efi_loader/efi_memory.c | 1 +
 lib/fdtdec.c                | 3 ++-
 4 files changed, 6 insertions(+), 2 deletions(-)

--\x20
2.7.4

'''
        lines = open(cover_fname, encoding='utf-8').read().splitlines()
        self.assertEqual(
                'Subject: [RFC PATCH v3 0/2] test: A test patch series',
                lines[3])
        self.assertEqual(expected.splitlines(), lines[7:])

        for i, fname in enumerate(args):
            lines = open(fname, encoding='utf-8').read().splitlines()
            subject = [line for line in lines if line.startswith('Subject')]
            self.assertEqual('Subject: [RFC %d/%d]' % (i + 1, count),
                             subject[0][:18])

            # Check that we got our commit notes
            start = 0
            expected = ''

            if i == 0:
                start = 17
                expected = '''---
Some notes about
the first commit

(no changes since v2)

Changes in v2:
- second revision change'''
            elif i == 1:
                start = 17
                expected = '''---

Changes in v4:
- Multi
  line
  change
- Some changes

Changes in v2:
- Changes only for this commit'''

            if expected:
                expected = expected.splitlines()
                self.assertEqual(expected, lines[start:(start+len(expected))])