# Created By: Virgil Dupras
# Created On: 2006/02/27
# Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
# 
# This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
# which should be included with this package. The terms are also available at 
# http://www.gnu.org/licenses/gpl-3.0.html

import os
import time
import tempfile
import shutil

from pytest import raises
from hscommon.path import Path
from hscommon.testutil import eq_

from ..directories import *

def create_fake_fs(rootpath):
    # We have it as a separate function because other units are using it.
    rootpath = rootpath['fs']
    rootpath.mkdir()
    rootpath['dir1'].mkdir()
    rootpath['dir2'].mkdir()
    rootpath['dir3'].mkdir()
    fp = rootpath['file1.test'].open('w')
    fp.write('1')
    fp.close()
    fp = rootpath['file2.test'].open('w')
    fp.write('12')
    fp.close()
    fp = rootpath['file3.test'].open('w')
    fp.write('123')
    fp.close()
    fp = rootpath['dir1']['file1.test'].open('w')
    fp.write('1')
    fp.close()
    fp = rootpath['dir2']['file2.test'].open('w')
    fp.write('12')
    fp.close()
    fp = rootpath['dir3']['file3.test'].open('w')
    fp.write('123')
    fp.close()
    return rootpath

def setup_module(module):
    # In this unit, we have tests depending on two directory structure. One with only one file in it
    # and another with a more complex structure.
    testpath = Path(tempfile.mkdtemp())
    module.testpath = testpath
    rootpath = testpath['onefile']
    rootpath.mkdir()
    fp = rootpath['test.txt'].open('w')
    fp.write('test_data')
    fp.close()
    create_fake_fs(testpath)

def teardown_module(module):
    shutil.rmtree(str(module.testpath))

def test_empty():
    d = Directories()
    eq_(len(d), 0)
    assert 'foobar' not in d

def test_add_path():
    d = Directories()
    p = testpath['onefile']
    d.add_path(p)
    eq_(1,len(d))
    assert p in d
    assert (p['foobar']) in d
    assert p.parent() not in d
    p = testpath['fs']
    d.add_path(p)
    eq_(2,len(d))
    assert p in d

def test_AddPath_when_path_is_already_there():
    d = Directories()
    p = testpath['onefile']
    d.add_path(p)
    with raises(AlreadyThereError):
        d.add_path(p)
    with raises(AlreadyThereError):
        d.add_path(p['foobar'])
    eq_(1, len(d))

def test_add_path_containing_paths_already_there():
    d = Directories()
    d.add_path(testpath['onefile'])
    eq_(1, len(d))
    d.add_path(testpath)
    eq_(len(d), 1)
    eq_(d[0], testpath)

def test_AddPath_non_latin(tmpdir):
	p = Path(str(tmpdir))
	to_add = p['unicode\u201a']
	os.mkdir(str(to_add))
	d = Directories()
	try:
		d.add_path(to_add)
	except UnicodeDecodeError:
		assert False

def test_del():
    d = Directories()
    d.add_path(testpath['onefile'])
    try:
        del d[1]
        assert False
    except IndexError:
        pass
    d.add_path(testpath['fs'])
    del d[1]
    eq_(1, len(d))

def test_states():
    d = Directories()
    p = testpath['onefile']
    d.add_path(p)
    eq_(DirectoryState.Normal ,d.get_state(p))
    d.set_state(p, DirectoryState.Reference)
    eq_(DirectoryState.Reference ,d.get_state(p))
    eq_(DirectoryState.Reference ,d.get_state(p['dir1']))
    eq_(1,len(d.states))
    eq_(p,list(d.states.keys())[0])
    eq_(DirectoryState.Reference ,d.states[p])

def test_get_state_with_path_not_there():
    # When the path's not there, just return DirectoryState.Normal
    d = Directories()
    d.add_path(testpath['onefile'])
    eq_(d.get_state(testpath), DirectoryState.Normal)

def test_states_overwritten_when_larger_directory_eat_smaller_ones():
    # ref #248
    # When setting the state of a folder, we overwrite previously set states for subfolders.
    d = Directories()
    p = testpath['onefile']
    d.add_path(p)
    d.set_state(p, DirectoryState.Excluded)
    d.add_path(testpath)
    d.set_state(testpath, DirectoryState.Reference)
    eq_(d.get_state(p), DirectoryState.Reference)
    eq_(d.get_state(p['dir1']), DirectoryState.Reference)
    eq_(d.get_state(testpath), DirectoryState.Reference)

def test_get_files():
    d = Directories()
    p = testpath['fs']
    d.add_path(p)
    d.set_state(p['dir1'], DirectoryState.Reference)
    d.set_state(p['dir2'], DirectoryState.Excluded)
    files = list(d.get_files())
    eq_(5, len(files))
    for f in files:
        if f.path.parent() == p['dir1']:
            assert f.is_ref
        else:
            assert not f.is_ref

def test_get_folders():
    d = Directories()
    p = testpath['fs']
    d.add_path(p)
    d.set_state(p['dir1'], DirectoryState.Reference)
    d.set_state(p['dir2'], DirectoryState.Excluded)
    folders = list(d.get_folders())
    eq_(len(folders), 3)
    ref = [f for f in folders if f.is_ref]
    not_ref = [f for f in folders if not f.is_ref]
    eq_(len(ref), 1)
    eq_(ref[0].path, p['dir1'])
    eq_(len(not_ref), 2)
    eq_(ref[0].size, 1)

def test_get_files_with_inherited_exclusion():
    d = Directories()
    p = testpath['onefile']
    d.add_path(p)
    d.set_state(p, DirectoryState.Excluded)
    eq_([], list(d.get_files()))

def test_save_and_load(tmpdir):
    d1 = Directories()
    d2 = Directories()
    p1 = Path(str(tmpdir.join('p1')))
    p1.mkdir()
    p2 = Path(str(tmpdir.join('p2')))
    p2.mkdir()
    d1.add_path(p1)
    d1.add_path(p2)
    d1.set_state(p1, DirectoryState.Reference)
    d1.set_state(p1['dir1'], DirectoryState.Excluded)
    tmpxml = str(tmpdir.join('directories_testunit.xml'))
    d1.save_to_file(tmpxml)
    d2.load_from_file(tmpxml)
    eq_(2, len(d2))
    eq_(DirectoryState.Reference ,d2.get_state(p1))
    eq_(DirectoryState.Excluded ,d2.get_state(p1['dir1']))

def test_invalid_path():
    d = Directories()
    p = Path('does_not_exist')
    with raises(InvalidPathError):
        d.add_path(p)
    eq_(0, len(d))

def test_set_state_on_invalid_path():
    d = Directories()
    try:
        d.set_state(Path('foobar',), DirectoryState.Normal)
    except LookupError:
        assert False

def test_load_from_file_with_invalid_path(tmpdir):
    #This test simulates a load from file resulting in a
    #InvalidPath raise. Other directories must be loaded.
    d1 = Directories()
    d1.add_path(testpath['onefile'])
    #Will raise InvalidPath upon loading
    p = Path(str(tmpdir.join('toremove')))
    p.mkdir()
    d1.add_path(p)
    p.rmdir()
    tmpxml = str(tmpdir.join('directories_testunit.xml'))
    d1.save_to_file(tmpxml)
    d2 = Directories()
    d2.load_from_file(tmpxml)
    eq_(1, len(d2))

def test_unicode_save(tmpdir):
    d = Directories()
    p1 = Path(str(tmpdir))['hello\xe9']
    p1.mkdir()
    p1['foo\xe9'].mkdir()
    d.add_path(p1)
    d.set_state(p1['foo\xe9'], DirectoryState.Excluded)
    tmpxml = str(tmpdir.join('directories_testunit.xml'))
    try:
        d.save_to_file(tmpxml)
    except UnicodeDecodeError:
        assert False

def test_get_files_refreshes_its_directories():
    d = Directories()
    p = testpath['fs']
    d.add_path(p)
    files = d.get_files()
    eq_(6, len(list(files)))
    time.sleep(1)
    os.remove(str(p['dir1']['file1.test']))
    files = d.get_files()
    eq_(5, len(list(files)))

def test_get_files_does_not_choke_on_non_existing_directories(tmpdir):
    d = Directories()
    p = Path(str(tmpdir))
    d.add_path(p)
    p.rmtree()
    eq_([], list(d.get_files()))

def test_get_state_returns_excluded_by_default_for_hidden_directories(tmpdir):
    d = Directories()
    p = Path(str(tmpdir))
    hidden_dir_path = p['.foo']
    p['.foo'].mkdir()
    d.add_path(p)
    eq_(d.get_state(hidden_dir_path), DirectoryState.Excluded)
    # But it can be overriden
    d.set_state(hidden_dir_path, DirectoryState.Normal)
    eq_(d.get_state(hidden_dir_path), DirectoryState.Normal)

def test_default_path_state_override(tmpdir):
    # It's possible for a subclass to override the default state of a path
    class MyDirectories(Directories):
        def _default_state_for_path(self, path):
            if 'foobar' in path:
                return DirectoryState.Excluded
    
    d = MyDirectories()
    p1 = Path(str(tmpdir))
    p1['foobar'].mkdir()
    p1['foobar/somefile'].open('w').close()
    p1['foobaz'].mkdir()
    p1['foobaz/somefile'].open('w').close()
    d.add_path(p1)
    eq_(d.get_state(p1['foobaz']), DirectoryState.Normal)
    eq_(d.get_state(p1['foobar']), DirectoryState.Excluded)
    eq_(len(list(d.get_files())), 1) # only the 'foobaz' file is there
    # However, the default state can be changed
    d.set_state(p1['foobar'], DirectoryState.Normal)
    eq_(d.get_state(p1['foobar']), DirectoryState.Normal)
    eq_(len(list(d.get_files())), 2)