# encoding: utf-8
import codecs
import unittest
import os
from os import path as op
import send2trash.plat_other
from send2trash.plat_other import send2trash as s2t
from send2trash.compat import PY3

try:
    from configparser import ConfigParser
except ImportError:
    # py2
    from ConfigParser import ConfigParser
from tempfile import mkdtemp, NamedTemporaryFile, mktemp
import shutil
import stat
import sys

# Could still use cleaning up. But no longer relies on ramfs.

HOMETRASH = send2trash.plat_other.HOMETRASH


def touch(path):
    with open(path, "a"):
        os.utime(path, None)


class TestHomeTrash(unittest.TestCase):
    def setUp(self):
        self.file = NamedTemporaryFile(
            dir=op.expanduser("~"), prefix="send2trash_test", delete=False
        )

    def test_trash(self):
        s2t(self.file.name)
        self.assertFalse(op.exists(self.file.name))

    def tearDown(self):
        name = op.basename(self.file.name)
        os.remove(op.join(HOMETRASH, "files", name))
        os.remove(op.join(HOMETRASH, "info", name + ".trashinfo"))


class TestHomeMultiTrash(unittest.TestCase):
    def setUp(self):
        self.files = list(
            map(
                lambda index: NamedTemporaryFile(
                    dir=op.expanduser("~"),
                    prefix="send2trash_test{}".format(index),
                    delete=False,
                ),
                range(10),
            )
        )

    def test_multitrash(self):
        filenames = [file.name for file in self.files]
        s2t(filenames)
        self.assertFalse(any([op.exists(filename) for filename in filenames]))

    def tearDown(self):
        filenames = [op.basename(file.name) for file in self.files]
        [os.remove(op.join(HOMETRASH, "files", filename)) for filename in filenames]
        [
            os.remove(op.join(HOMETRASH, "info", filename + ".trashinfo"))
            for filename in filenames
        ]


def _filesys_enc():
    enc = sys.getfilesystemencoding()
    # Get canonical name of codec
    return codecs.lookup(enc).name


@unittest.skipIf(_filesys_enc() == "ascii", "ASCII filesystem")
class TestUnicodeTrash(unittest.TestCase):
    def setUp(self):
        self.name = u"send2trash_tést1"
        self.file = op.join(op.expanduser(b"~"), self.name.encode("utf-8"))
        touch(self.file)

    def test_trash_bytes(self):
        s2t(self.file)
        assert not op.exists(self.file)

    def test_trash_unicode(self):
        s2t(self.file.decode(sys.getfilesystemencoding()))
        assert not op.exists(self.file)

    def tearDown(self):
        if op.exists(self.file):
            os.remove(self.file)

        trash_file = op.join(HOMETRASH, "files", self.name)
        if op.exists(trash_file):
            os.remove(trash_file)
            os.remove(op.join(HOMETRASH, "info", self.name + ".trashinfo"))


#
# Tests for files on some other volume than the user's home directory.
#
# What we need to stub:
# * plat_other.get_dev (to make sure the file will not be on the home dir dev)
# * os.path.ismount (to make our topdir look like a top dir)
#
class TestExtVol(unittest.TestCase):
    def setUp(self):
        self.trashTopdir = mkdtemp(prefix="s2t")
        if PY3:
            trashTopdir_b = os.fsencode(self.trashTopdir)
        else:
            trashTopdir_b = self.trashTopdir
        self.fileName = "test.txt"
        self.filePath = op.join(self.trashTopdir, self.fileName)
        touch(self.filePath)

        self.old_ismount = old_ismount = op.ismount
        self.old_getdev = send2trash.plat_other.get_dev

        def s_getdev(path):
            from send2trash.plat_other import is_parent

            st = os.lstat(path)
            if is_parent(self.trashTopdir, path):
                return "dev"
            return st.st_dev

        def s_ismount(path):
            if op.realpath(path) in (
                op.realpath(self.trashTopdir),
                op.realpath(trashTopdir_b),
            ):
                return True
            return old_ismount(path)

        send2trash.plat_other.os.path.ismount = s_ismount
        send2trash.plat_other.get_dev = s_getdev

    def tearDown(self):
        send2trash.plat_other.get_dev = self.old_getdev
        send2trash.plat_other.os.path.ismount = self.old_ismount
        shutil.rmtree(self.trashTopdir)


class TestTopdirTrash(TestExtVol):
    def setUp(self):
        TestExtVol.setUp(self)
        # Create a .Trash dir w/ a sticky bit
        self.trashDir = op.join(self.trashTopdir, ".Trash")
        os.mkdir(self.trashDir, 0o777 | stat.S_ISVTX)

    def test_trash(self):
        s2t(self.filePath)
        self.assertFalse(op.exists(self.filePath))
        self.assertTrue(
            op.exists(op.join(self.trashDir, str(os.getuid()), "files", self.fileName))
        )
        self.assertTrue(
            op.exists(
                op.join(
                    self.trashDir,
                    str(os.getuid()),
                    "info",
                    self.fileName + ".trashinfo",
                )
            )
        )
        # info relative path (if another test is added, with the same fileName/Path,
        # then it gets renamed etc.)
        cfg = ConfigParser()
        cfg.read(
            op.join(
                self.trashDir, str(os.getuid()), "info", self.fileName + ".trashinfo"
            )
        )
        self.assertEqual(self.fileName, cfg.get("Trash Info", "Path", raw=True))


# Test .Trash-UID
class TestTopdirTrashFallback(TestExtVol):
    def test_trash(self):
        touch(self.filePath)
        s2t(self.filePath)
        self.assertFalse(op.exists(self.filePath))
        self.assertTrue(
            op.exists(
                op.join(
                    self.trashTopdir,
                    ".Trash-" + str(os.getuid()),
                    "files",
                    self.fileName,
                )
            )
        )


# Test failure
class TestTopdirFailure(TestExtVol):
    def setUp(self):
        TestExtVol.setUp(self)
        os.chmod(self.trashTopdir, 0o500)  # not writable to induce the exception

    def test_trash(self):
        with self.assertRaises(OSError):
            s2t(self.filePath)
        self.assertTrue(op.exists(self.filePath))

    def tearDown(self):
        os.chmod(self.trashTopdir, 0o700)  # writable to allow deletion
        TestExtVol.tearDown(self)


# Make sure it will find the mount point properly for a file in a symlinked path
class TestSymlink(TestExtVol):
    def setUp(self):
        TestExtVol.setUp(self)
        # Use mktemp (race conditioney but no symlink equivalent)
        # Since is_parent uses realpath(), and our getdev uses is_parent,
        # this should work
        self.slDir = mktemp(prefix="s2t", dir=op.expanduser("~"))

        os.mkdir(op.join(self.trashTopdir, "subdir"), 0o700)
        self.filePath = op.join(self.trashTopdir, "subdir", self.fileName)
        touch(self.filePath)
        os.symlink(op.join(self.trashTopdir, "subdir"), self.slDir)

    def test_trash(self):
        s2t(op.join(self.slDir, self.fileName))
        self.assertFalse(op.exists(self.filePath))
        self.assertTrue(
            op.exists(
                op.join(
                    self.trashTopdir,
                    ".Trash-" + str(os.getuid()),
                    "files",
                    self.fileName,
                )
            )
        )

    def tearDown(self):
        os.remove(self.slDir)
        TestExtVol.tearDown(self)


if __name__ == "__main__":
    unittest.main()