# -*- coding: utf-8 -*-
"""Tests for completerlib."""

# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------

import os
import shutil
import sys
import tempfile
import unittest
from os.path import join

from tempfile import TemporaryDirectory

from IPython.core.completerlib import magic_run_completer, module_completion, try_import
from IPython.testing.decorators import onlyif_unicode_paths


class MockEvent(object):
    def __init__(self, line):
        self.line = line


# -----------------------------------------------------------------------------
# Test functions begin
# -----------------------------------------------------------------------------
class Test_magic_run_completer(unittest.TestCase):
    files = ["aao.py", "a.py", "b.py", "aao.txt"]
    dirs = ["adir/", "bdir/"]

    def setUp(self):
        self.BASETESTDIR = tempfile.mkdtemp()
        for fil in self.files:
            with open(join(self.BASETESTDIR, fil), "w", encoding="utf-8") as sfile:
                sfile.write("pass\n")
        for d in self.dirs:
            os.mkdir(join(self.BASETESTDIR, d))

        self.oldpath = os.getcwd()
        os.chdir(self.BASETESTDIR)

    def tearDown(self):
        os.chdir(self.oldpath)
        shutil.rmtree(self.BASETESTDIR)

    def test_1(self):
        """Test magic_run_completer, should match two alternatives"""
        event = MockEvent("%run a")
        mockself = None
        match = set(magic_run_completer(mockself, event))
        self.assertEqual(match, {"a.py", "aao.py", "adir/"})

    def test_2(self):
        """Test magic_run_completer, should match one alternative"""
        event = MockEvent("%run aa")
        mockself = None
        match = set(magic_run_completer(mockself, event))
        self.assertEqual(match, {"aao.py"})

    def test_3(self):
        """Test magic_run_completer with unterminated " """
        event = MockEvent('%run "a')
        mockself = None
        match = set(magic_run_completer(mockself, event))
        self.assertEqual(match, {"a.py", "aao.py", "adir/"})

    def test_completion_more_args(self):
        event = MockEvent("%run a.py ")
        match = set(magic_run_completer(None, event))
        self.assertEqual(match, set(self.files + self.dirs))

    def test_completion_in_dir(self):
        # Github issue #3459
        event = MockEvent("%run a.py {}".format(join(self.BASETESTDIR, "a")))
        print(repr(event.line))
        match = set(magic_run_completer(None, event))
        # We specifically use replace here rather than normpath, because
        # at one point there were duplicates 'adir' and 'adir/', and normpath
        # would hide the failure for that.
        self.assertEqual(
            match,
            {
                join(self.BASETESTDIR, f).replace("\\", "/")
                for f in ("a.py", "aao.py", "aao.txt", "adir/")
            },
        )


class Test_magic_run_completer_nonascii(unittest.TestCase):
    @onlyif_unicode_paths
    def setUp(self):
        self.BASETESTDIR = tempfile.mkdtemp()
        for fil in ["aaø.py", "a.py", "b.py"]:
            with open(join(self.BASETESTDIR, fil), "w", encoding="utf-8") as sfile:
                sfile.write("pass\n")
        self.oldpath = os.getcwd()
        os.chdir(self.BASETESTDIR)

    def tearDown(self):
        os.chdir(self.oldpath)
        shutil.rmtree(self.BASETESTDIR)

    @onlyif_unicode_paths
    def test_1(self):
        """Test magic_run_completer, should match two alternatives"""
        event = MockEvent("%run a")
        mockself = None
        match = set(magic_run_completer(mockself, event))
        self.assertEqual(match, {"a.py", "aaø.py"})

    @onlyif_unicode_paths
    def test_2(self):
        """Test magic_run_completer, should match one alternative"""
        event = MockEvent("%run aa")
        mockself = None
        match = set(magic_run_completer(mockself, event))
        self.assertEqual(match, {"aaø.py"})

    @onlyif_unicode_paths
    def test_3(self):
        """Test magic_run_completer with unterminated " """
        event = MockEvent('%run "a')
        mockself = None
        match = set(magic_run_completer(mockself, event))
        self.assertEqual(match, {"a.py", "aaø.py"})


# module_completer:


def test_import_invalid_module():
    """Testing of issue https://github.com/ipython/ipython/issues/1107"""
    invalid_module_names = {"foo-bar", "foo:bar", "10foo"}
    valid_module_names = {"foobar"}
    with TemporaryDirectory() as tmpdir:
        sys.path.insert(0, tmpdir)
        for name in invalid_module_names | valid_module_names:
            filename = os.path.join(tmpdir, name + ".py")
            open(filename, "w", encoding="utf-8").close()

        s = set(module_completion("import foo"))
        intersection = s.intersection(invalid_module_names)
        assert intersection == set()

        assert valid_module_names.issubset(s), valid_module_names.intersection(s)


def test_bad_module_all():
    """Test module with invalid __all__

    https://github.com/ipython/ipython/issues/9678
    """
    testsdir = os.path.dirname(__file__)
    sys.path.insert(0, testsdir)
    try:
        results = module_completion("from bad_all import ")
        assert "puppies" in results
        for r in results:
            assert isinstance(r, str)

        # bad_all doesn't contain submodules, but this completion
        # should finish without raising an exception:
        results = module_completion("import bad_all.")
        assert results == []
    finally:
        sys.path.remove(testsdir)


def test_module_without_init():
    """
    Test module without __init__.py.

    https://github.com/ipython/ipython/issues/11226
    """
    fake_module_name = "foo_xder_134"
    with TemporaryDirectory() as tmpdir:
        sys.path.insert(0, tmpdir)
        try:
            os.makedirs(os.path.join(tmpdir, fake_module_name))
            s = try_import(mod=fake_module_name)
            assert s == [], f"for module {fake_module_name}"
        finally:
            sys.path.remove(tmpdir)


def test_valid_exported_submodules():
    """
    Test checking exported (__all__) objects are submodules
    """
    results = module_completion("import os.pa")
    # ensure we get a valid submodule:
    assert "os.path" in results
    # ensure we don't get objects that aren't submodules:
    assert "os.pathconf" not in results