# -*- coding: utf-8 -*-
#
# Copyright (C) 2012-2013 Vinay Sajip.
# Licensed to the Python Software Foundation under a contributor agreement.
# See LICENSE.txt and CONTRIBUTORS.txt.
#
import os
import shutil
import subprocess
import sys
import tempfile

from compat import unittest

from distlib import DistlibException
from distlib.compat import fsencode, sysconfig
from distlib.scripts import ScriptMaker
from distlib.util import get_executable

HERE = os.path.abspath(os.path.dirname(__file__))

COPIED_SCRIPT = '''#!python
# This is a copied script
'''

MADE_SCRIPT = 'made = dummy.module:main'


class ScriptTestCase(unittest.TestCase):

    def setUp(self):
        source_dir = os.path.join(HERE, 'scripts')
        target_dir = tempfile.mkdtemp()
        self.maker = ScriptMaker(source_dir, target_dir, add_launchers=False)

    def tearDown(self):
        shutil.rmtree(self.maker.target_dir)

    @unittest.skipIf(sysconfig.is_python_build(), 'Test not appropriate for '
                     'Python source builds')
    def test_shebangs(self):
        executable = fsencode(get_executable())
        for fn in ('foo.py', 'script1.py', 'script2.py', 'script3.py',
                   'shell.sh'):
            files = self.maker.make(fn)
            self.assertEqual(len(files), 1)
            d, f = os.path.split(files[0])
            self.assertEqual(f, fn)
            self.assertEqual(d, self.maker.target_dir)
            if fn.endswith('.py') and fn != 'foo.py':   # no shebang in foo.py
                with open(files[0], 'rb') as f:
                    first_line = f.readline()
                self.assertIn(executable, first_line)

    def test_shebangs_custom_executable(self):
        srcdir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, srcdir)
        dstdir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, dstdir)
        maker = ScriptMaker(srcdir, dstdir, add_launchers=False)
        maker.executable = 'this_should_appear_in_the_shebang_line'
        #let's create the script to be copied. It has a vanilla shebang line.
        fn = os.path.join(srcdir, 'copied')
        with open(fn, 'w') as f:
            f.write(COPIED_SCRIPT)
        # Let's ask the maker to copy the script, and see what the shebang is
        # in the copy.
        filenames = maker.make('copied')
        with open(filenames[0], 'r') as f:
            actual = f.readline()
        self.assertIn(maker.executable, actual)
        # Now let's make a script from a callable
        filenames = maker.make(MADE_SCRIPT)
        with open(filenames[0], 'r') as f:
            actual = f.readline()
        self.assertIn(maker.executable, actual)

    def test_multiple(self):
        specs = ('foo.py', 'script1.py', 'script2.py', 'script3.py',
                 'shell.sh')
        files = self.maker.make_multiple(specs)
        self.assertEqual(len(specs), len(files))
        expected = set(specs)
        self.assertEqual(expected, set([os.path.basename(f) for f in files]))
        ofiles = os.listdir(self.maker.target_dir)
        self.assertEqual(expected, set(ofiles))

    def test_generation(self):
        self.maker.clobber = True
        for name in ('main', 'other_main'):
            for options in (None, {}, {'gui': False}, {'gui': True}):
                gui = options and options.get('gui', False)
                spec = 'foo = foo:' + name
                files = self.maker.make(spec, options)
                self.assertEqual(len(files), 2)
                actual = set()
                for f in files:
                    d, f = os.path.split(f)
                    actual.add(f)
                if os.name == 'nt':
                    if gui:
                        ext = 'pyw'
                    else:
                        ext = 'py'
                    expected = set(['foo.%s' % ext,
                                    'foo-%s.%s' % (sys.version[:3], ext)])
                else:
                    expected = set(['foo', 'foo-%s' % sys.version[:3]])
                self.assertEqual(actual, expected)
                self.assertEqual(d, self.maker.target_dir)
                for fn in files:
                    with open(fn, 'r') as f:
                        text = f.read()
                    self.assertIn("_resolve('foo', '%s')" % name, text)
                    if options and options['gui'] and os.name == 'nt':
                        first_line, rest = text.split('\n', 1)
                        self.assertIn('pythonw', first_line)

    def test_clobber(self):
        files = self.maker.make('foo = foo:main')
        saved_files = files
        self.assertGreaterEqual(len(files), 2)  # foo, foo-X.Y
        files = self.maker.make('foo = foo:main')
        self.assertFalse(files)
        self.maker.clobber = True
        files = self.maker.make('foo = foo:main')
        self.assertEqual(files, saved_files)

    @unittest.skipIf(os.name != 'nt', 'Test is Windows-specific')
    def test_launchers(self):
        tlauncher = self.maker._get_launcher('t')
        self.maker.add_launchers = True
        specs = ('foo.py', 'script1.py', 'script2.py', 'script3.py',
                 'shell.sh')
        files = self.maker.make_multiple(specs)
        self.assertEqual(len(specs), len(files))
        filenames = set([os.path.basename(f) for f in files])
        self.assertEqual(filenames, set(('foo.py', 'script1.exe',
                                         'script2.exe', 'script3.exe',
                                         'shell.sh')))
        for fn in files:
            if not fn.endswith('.exe'):
                continue
            with open(fn, 'rb') as f:
                data = f.read()
            self.assertTrue(data.startswith(tlauncher))

    @unittest.skipIf(os.name != 'nt', 'Test is Windows-specific')
    def test_windows(self):
        wlauncher = self.maker._get_launcher('w')
        tlauncher = self.maker._get_launcher('t')
        self.maker.add_launchers = True
        executable = sys.executable.encode('utf-8')
        wexecutable = executable.replace(b'python.exe', b'pythonw.exe')
        files = self.maker.make('script4.py')
        self.assertEqual(len(files), 1)
        filenames = set([os.path.basename(f) for f in files])
        self.assertEqual(filenames, set(['script4.exe']))
        for fn in files:
            with open(fn, 'rb') as f:
                data = f.read()
            self.assertTrue(data.startswith(wlauncher))
            self.assertIn(executable, data)
        # Now test making scripts gui and console
        files = self.maker.make('foo = foo:main', {'gui': True})
        self.assertEqual(len(files), 2)
        filenames = set([os.path.basename(f) for f in files])
        specific = sys.version[:3]
        self.assertEqual(filenames, set(('foo.exe', 'foo-%s.exe' % specific)))
        for fn in files:
            with open(fn, 'rb') as f:
                data = f.read()
            self.assertTrue(data.startswith(wlauncher))
            self.assertIn(wexecutable, data)

        files = self.maker.make('foo = foo:main')
        self.assertEqual(len(files), 2)
        filenames = set([os.path.basename(f) for f in files])
        self.assertEqual(filenames, set(('foo.exe', 'foo-%s.exe' % specific)))
        for fn in files:
            with open(fn, 'rb') as f:
                data = f.read()
            self.assertTrue(data.startswith(tlauncher))
            self.assertIn(executable, data)

    def test_dry_run(self):
        self.maker.dry_run = True
        self.maker.variants = set([''])
        specs = ('foo.py', 'bar = foo:main')
        files = self.maker.make_multiple(specs)
        self.assertEqual(len(specs), len(files))
        if os.name == 'nt':
            bar = 'bar.py'
        else:
            bar = 'bar'
        self.assertEqual(set(('foo.py', bar)),
                         set([os.path.basename(f) for f in files]))
        ofiles = os.listdir(self.maker.target_dir)
        self.assertFalse(ofiles)

    def test_script_run(self):
        files = self.maker.make('test = cgi:print_directory')
        self.assertEqual(len(files), 2)
        p = subprocess.Popen([sys.executable, files[0]],
                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        stdout, stderr = p.communicate()
        self.assertIn(b'<H3>Current Working Directory:</H3>', stdout)
        self.assertIn(os.getcwd().encode('utf-8'), stdout)

    @unittest.skipUnless(os.name == 'posix', 'Test only valid for POSIX')
    def test_mode(self):
        self.maker.set_mode = False
        files = self.maker.make('foo = foo:main')
        self.assertEqual(len(files), 2)
        for f in files:
            self.assertIn(os.stat(f).st_mode & 0o7777, (0o644, 0o664))
        self.maker.set_mode = True
        files = self.maker.make('bar = bar:main')
        self.assertEqual(len(files), 2)
        for f in files:
            self.assertIn(os.stat(f).st_mode & 0o7777, (0o755, 0o775))

if __name__ == '__main__':  # pragma: no cover
    unittest.main()
