# coding=utf-8
"""
Cmd2 unit/functional testing

Copyright 2016 Federico Ceratto <federico.ceratto@gmail.com>
Released under MIT license, see LICENSE file
"""
import os
import sys

import mock
import pytest
import six

from code import InteractiveConsole

# Used for sm.input: raw_input() for Python 2 or input() for Python 3
import six.moves as sm

import cmd2
from conftest import run_cmd, normalize, BASE_HELP, HELP_HISTORY, SHORTCUTS_TXT, SHOW_TXT, SHOW_LONG, StdOut


def test_ver():
    assert cmd2.__version__ == '0.7.2'


def test_base_help(base_app):
    out = run_cmd(base_app, 'help')
    expected = normalize(BASE_HELP)
    assert out == expected


def test_base_help_history(base_app):
    out = run_cmd(base_app, 'help history')
    expected = normalize(HELP_HISTORY)
    assert out == expected


def test_base_shortcuts(base_app):
    out = run_cmd(base_app, 'shortcuts')
    expected = normalize(SHORTCUTS_TXT)
    assert out == expected


def test_base_show(base_app):
    # force editor to be 'vim' so test is repeatable across platforms
    base_app.editor = 'vim'
    out = run_cmd(base_app, 'show')
    expected = normalize(SHOW_TXT)
    assert out == expected


def test_base_show_long(base_app):
    # force editor to be 'vim' so test is repeatable across platforms
    base_app.editor = 'vim'
    out = run_cmd(base_app, 'show -l')
    expected = normalize(SHOW_LONG)
    assert out == expected


def test_base_set(base_app):
    out = run_cmd(base_app, 'set quiet True')
    expected = normalize("""
quiet - was: False
now: True
""")
    assert out == expected

    out = run_cmd(base_app, 'show quiet')
    assert out == ['quiet: True']


def test_base_set_not_supported(base_app, capsys):
    run_cmd(base_app, 'set qqq True')
    out, err = capsys.readouterr()
    expected = normalize("""
EXCEPTION of type 'LookupError' occurred with message: 'Parameter 'qqq' not supported (type 'show' for list of parameters).'
To enable full traceback, run the following command:  'set debug true'
""")
    assert normalize(str(err)) == expected


def test_base_shell(base_app, monkeypatch):
    m = mock.Mock()
    monkeypatch.setattr("os.system", m)
    out = run_cmd(base_app, 'shell echo a')
    assert out == []
    assert m.called
    m.assert_called_with('echo a')


def test_base_py(base_app, capsys):
    run_cmd(base_app, 'py qqq=3')
    out, err = capsys.readouterr()
    assert out == ''
    run_cmd(base_app, 'py print(qqq)')
    out, err = capsys.readouterr()
    assert out.rstrip() == '3'


@pytest.mark.skipif(sys.platform == 'win32',
                    reason="Unit test doesn't work on win32, but feature does")
def test_base_run_python_script(base_app, capsys, request):
    test_dir = os.path.dirname(request.module.__file__)
    python_script = os.path.join(test_dir, 'script.py')
    expected = 'This is a python script running ...\n'

    run_cmd(base_app, "py run('{}')".format(python_script))
    out, err = capsys.readouterr()
    assert out == expected


def test_base_error(base_app):
    out = run_cmd(base_app, 'meow')
    assert out == ["*** Unknown syntax: meow"]


def test_base_history(base_app):
    run_cmd(base_app, 'help')
    run_cmd(base_app, 'shortcuts')
    out = run_cmd(base_app, 'history')
    expected = normalize("""
-------------------------[1]
help
-------------------------[2]
shortcuts
""")
    assert out == expected

    out = run_cmd(base_app, 'history he')
    expected = normalize("""
-------------------------[1]
help
""")
    assert out == expected

    out = run_cmd(base_app, 'history sh')
    expected = normalize("""
-------------------------[2]
shortcuts
""")
    assert out == expected


def test_base_list(base_app):
    run_cmd(base_app, 'help')
    run_cmd(base_app, 'shortcuts')
    out = run_cmd(base_app, 'list')
    expected = normalize("""
-------------------------[2]
shortcuts
""")
    assert out == expected


def test_list_with_string_argument(base_app):
    run_cmd(base_app, 'help')
    run_cmd(base_app, 'shortcuts')
    run_cmd(base_app, 'help list')
    out = run_cmd(base_app, 'list help')
    expected = normalize("""
-------------------------[1]
help
-------------------------[3]
help list
""")
    assert out == expected


def test_list_with_integer_argument(base_app):
    run_cmd(base_app, 'help')
    run_cmd(base_app, 'shortcuts')
    out = run_cmd(base_app, 'list 1')
    expected = normalize("""
-------------------------[1]
help
""")
    assert out == expected


def test_list_with_integer_span(base_app):
    run_cmd(base_app, 'help')
    run_cmd(base_app, 'shortcuts')
    run_cmd(base_app, 'help list')
    out = run_cmd(base_app, 'list 1..2')
    expected = normalize("""
-------------------------[1]
help
-------------------------[2]
shortcuts
""")
    assert out == expected


def test_base_cmdenvironment(base_app):
    out = run_cmd(base_app, 'cmdenvironment')
    expected = normalize("""

        Commands are case-sensitive: False
        Commands may be terminated with: [';']
        Command-line arguments allowed: True
        Output redirection and pipes allowed: True
""")
    assert out[:4] == expected[:4]
    assert out[4].strip().startswith('Settable parameters: ')

    # Settable parameters can be listed in any order, so need to validate carefully using unordered sets
    settable_params = {'continuation_prompt', 'default_file_name', 'prompt', 'abbrev', 'quiet', 'case_insensitive',
                       'colors', 'echo', 'timing', 'editor', 'feedback_to_output', 'debug', 'autorun_on_edit',
                       'locals_in_py'}
    out_params = set(out[4].split("Settable parameters: ")[1].split())
    assert settable_params == out_params


def test_base_load(base_app, request):
    test_dir = os.path.dirname(request.module.__file__)
    filename = os.path.join(test_dir, 'script.txt')

    # The way the load command works, we can't directly capture its stdout or stderr
    run_cmd(base_app, 'load {}'.format(filename))

    # But what we can do is check the history to see what commands have been run ...
    out = run_cmd(base_app, 'history')

    # TODO: Figure out why when we unit test the command this way the commands from the script aren't shown in history
    # NOTE: It works correctly when we run it at the command line
    expected = normalize("""
-------------------------[1]
load {}
""".format(filename))
    assert out == expected


def test_base_load_default_file(base_app, capsys):
    # TODO: Make sure to remove the 'command.txt' file in case it exists

    # The way the load command works, we can't directly capture its stdout or stderr
    run_cmd(base_app, 'load')
    out, err = capsys.readouterr()

    # The default file 'command.txt' doesn't exist, so we should get an error message
    expected = normalize("""ERROR: Problem accessing script from command.txt:
[Errno 2] No such file or directory: 'command.txt.txt'
To enable full traceback, run the following command:  'set debug true'
""")
    assert normalize(str(err)) == expected


def test_base_relative_load(base_app, request):
    test_dir = os.path.dirname(request.module.__file__)
    filename = os.path.join(test_dir, 'script.txt')

    # The way the load command works, we can't directly capture its stdout or stderr
    run_cmd(base_app, '_relative_load {}'.format(filename))

    # But what we can do is check the history to see what commands have been run ...
    out = run_cmd(base_app, 'history')

    # TODO: Figure out why when we unit test the command this way the commands from the script aren't shown in history
    # NOTE: It works correctly when we run it at the command line
    expected = normalize("""
-------------------------[1]
_relative_load {}
""".format(filename))
    assert out == expected


def test_base_save(base_app):
    # TODO: Use a temporary directory for the file
    filename = 'deleteme.txt'
    run_cmd(base_app, 'help')
    run_cmd(base_app, 'help save')

    # Test the * form of save which saves all commands from history
    out = run_cmd(base_app, 'save * {}'.format(filename))
    assert out == normalize('Saved to {}\n'.format(filename))
    expected = normalize("""
help

help save

save * deleteme.txt
""")
    with open(filename) as f:
        content = normalize(f.read())
    assert content == expected

    # Test the N form of save which saves a numbered command from history
    out = run_cmd(base_app, 'save 1 {}'.format(filename))
    assert out == normalize('Saved to {}\n'.format(filename))
    expected = normalize('help')
    with open(filename) as f:
        content = normalize(f.read())
    assert content == expected

    # Test the blank form of save which saves the most recent command from history
    out = run_cmd(base_app, 'save {}'.format(filename))
    assert out == normalize('Saved to {}\n'.format(filename))
    expected = normalize('save 1 {}'.format(filename))
    with open(filename) as f:
        content = normalize(f.read())
    assert content == expected

    # Delete file that was created
    os.remove(filename)


def test_output_redirection(base_app):
    # TODO: Use a temporary directory/file for this file
    filename = 'out.txt'

    # Verify that writing to a file works
    run_cmd(base_app, 'help > {}'.format(filename))
    expected = normalize(BASE_HELP)
    with open(filename) as f:
        content = normalize(f.read())
    assert content == expected

    # Verify that appending to a file also works
    run_cmd(base_app, 'help history >> {}'.format(filename))
    expected = normalize(BASE_HELP + '\n' + HELP_HISTORY)
    with open(filename) as f:
        content = normalize(f.read())
    assert content == expected

    # Delete file that was created
    os.remove(filename)


def test_allow_redirection(base_app):
    # Set allow_redirection to False
    base_app.allow_redirection = False

    filename = 'test_allow_redirect.txt'

    # Verify output wasn't redirected
    out = run_cmd(base_app, 'help > {}'.format(filename))
    expected = normalize(BASE_HELP)
    assert out == expected

    # Verify that no file got created
    assert not os.path.exists(filename)


def test_input_redirection(base_app, request):
    test_dir = os.path.dirname(request.module.__file__)
    filename = os.path.join(test_dir, 'redirect.txt')

    # NOTE: File 'redirect.txt" contains 1 word "history"

    # Verify that redirecting input from a file works
    out = run_cmd(base_app, 'help < {}'.format(filename))
    expected = normalize(HELP_HISTORY)
    assert out == expected


def test_pipe_to_shell(base_app):
    # Get help on help and pipe it's output to the input of the word count shell command
    out = run_cmd(base_app, 'help help | wc')

    if sys.platform == "win32":
        expected = normalize("1      11      71")
    else:
        expected = normalize("1      11      70")

    assert out[0].strip() == expected[0].strip()


def test_send_to_paste_buffer(base_app):
    from cmd2 import can_clip

    run_cmd(base_app, 'help >')
    expected = normalize(BASE_HELP)

    # If an appropriate tool is installed for reading the contents of the clipboard, then do so
    if can_clip:
        # Read from the clipboard
        try:
            # Python2
            import Tkinter as tk
        except ImportError:
            # Python3
            import tkinter as tk

        root = tk.Tk()
        # keep the window from showing
        root.withdraw()

        # read the clipboard
        c = root.clipboard_get()

        assert normalize(c) == expected


def test_base_timing(base_app, capsys):
    base_app.feedback_to_output = False
    out = run_cmd(base_app, 'set timing True')
    expected = normalize("""timing - was: False
now: True
""")
    assert out == expected
    out, err = capsys.readouterr()
    if sys.platform == 'win32':
        assert out.startswith('Elapsed: 0:00:00')
    else:
        assert out.startswith('Elapsed: 0:00:00.0')


def test_base_debug(base_app, capsys):
    # Try to load a non-existent file with debug set to False by default
    run_cmd(base_app, 'load does_not_exist.txt')
    out, err = capsys.readouterr()
    assert err.startswith('ERROR')

    # Set debug true
    out = run_cmd(base_app, 'set debug True')
    expected = normalize("""
debug - was: False
now: True
""")
    assert out == expected

    # Verify that we now see the exception traceback
    run_cmd(base_app, 'load does_not_exist.txt')
    out, err = capsys.readouterr()
    assert str(err).startswith('Traceback (most recent call last):')


def test_base_colorize(base_app):
    # If using base_app test fixture it won't get colorized because we replaced self.stdout
    color_test = base_app.colorize('Test', 'red')
    assert color_test == 'Test'

    # But if we create a fresh Cmd() instance, it will
    fresh_app = cmd2.Cmd()
    color_test = fresh_app.colorize('Test', 'red')
    # Actually, colorization only ANSI escape codes is only applied on non-Windows systems
    if sys.platform == 'win32':
        assert color_test == 'Test'
    else:
        assert color_test == '\x1b[31mTest\x1b[39m'


def _expected_no_editor_error():
    expected_exception = 'OSError'
    # If using Python 2 or PyPy (either 2 or 3), expect a different exception than with Python 3
    if six.PY2 or hasattr(sys, "pypy_translation_info"):
        expected_exception = 'EnvironmentError'

    expected_text = normalize("""
EXCEPTION of type '{}' occurred with message: 'Please use 'set editor' to specify your text editing program of choice.'
To enable full traceback, run the following command:  'set debug true'
""".format(expected_exception))

    return expected_text


def test_edit_no_editor(base_app, capsys):
    # Purposely set the editor to None
    base_app.editor = None

    # Make sure we get an exception, but cmd2 handles it
    run_cmd(base_app, 'ed')
    out, err = capsys.readouterr()

    expected = _expected_no_editor_error()
    assert normalize(str(err)) == expected


def test_edit_file(base_app, request):
    # Set a fake editor just to make sure we have one.  We aren't really going to call it due to the mock
    base_app.editor = 'fooedit'

    # Mock out the os.system call so we don't actually open an editor
    m = mock.MagicMock(name='system')
    os.system = m

    test_dir = os.path.dirname(request.module.__file__)
    filename = os.path.join(test_dir, 'script.txt')

    run_cmd(base_app, 'edit {}'.format(filename))

    # We think we have an editor, so should expect a system call
    m.assert_called_once_with('{} {}'.format(base_app.editor, filename))


def test_edit_number(base_app):
    # Set a fake editor just to make sure we have one.  We aren't really going to call it due to the mock
    base_app.editor = 'fooedit'

    # Mock out the os.system call so we don't actually open an editor
    m = mock.MagicMock(name='system')
    os.system = m

    # Run help command just so we have a command in history
    run_cmd(base_app, 'help')

    run_cmd(base_app, 'edit 1')

    # We have an editor, so should expect a system call
    m.assert_called_once_with('{} {}'.format(base_app.editor, base_app.default_file_name))

    # Editing history item causes a file of default name to get created, remove it so we have a clean slate
    os.remove(base_app.default_file_name)


def test_edit_blank(base_app):
    # Set a fake editor just to make sure we have one.  We aren't really going to call it due to the mock
    base_app.editor = 'fooedit'

    # Mock out the os.system call so we don't actually open an editor
    m = mock.MagicMock(name='system')
    os.system = m

    # Run help command just so we have a command in history
    run_cmd(base_app, 'help')

    run_cmd(base_app, 'edit')

    # We have an editor, so should expect a system call
    m.assert_called_once_with('{} {}'.format(base_app.editor, base_app.default_file_name))

    # Editing history item causes a file of default name to get created, remove it so we have a clean slate
    os.remove(base_app.default_file_name)


def test_base_py_interactive(base_app):
    # Mock out the InteractiveConsole.interact() call so we don't actually wait for a user's response on stdin
    m = mock.MagicMock(name='interact')
    InteractiveConsole.interact = m

    run_cmd(base_app, "py")

    # Make sure our mock was called once and only once
    m.assert_called_once()


def test_base_cmdloop_with_queue():
    # Create a cmd2.Cmd() instance and make sure basic settings are like we want for test
    app = cmd2.Cmd()
    app.use_rawinput = True
    app.intro = 'Hello World, this is an intro ...'
    app.cmdqueue.append('quit\n')
    app.stdout = StdOut()

    # Need to patch sys.argv so cmd2 doesn't think it was called with arguments equal to the py.test args
    testargs = ["prog"]
    expected = app.intro + '\n'
    with mock.patch.object(sys, 'argv', testargs):
        # Run the command loop
        app.cmdloop()
    out = app.stdout.buffer
    assert out == expected


def test_base_cmdloop_without_queue():
    # Create a cmd2.Cmd() instance and make sure basic settings are like we want for test
    app = cmd2.Cmd()
    app.use_rawinput = True
    app.intro = 'Hello World, this is an intro ...'
    app.stdout = StdOut()

    # Mock out the input call so we don't actually wait for a user's response on stdin
    m = mock.MagicMock(name='input', return_value='quit')
    sm.input = m

    # Need to patch sys.argv so cmd2 doesn't think it was called with arguments equal to the py.test args
    testargs = ["prog"]
    expected = app.intro + '\n'
    with mock.patch.object(sys, 'argv', testargs):
        # Run the command loop
        app.cmdloop()
    out = app.stdout.buffer
    assert out == expected


def test_cmdloop_without_rawinput():
    # Create a cmd2.Cmd() instance and make sure basic settings are like we want for test
    app = cmd2.Cmd()
    app.use_rawinput = False
    app.intro = 'Hello World, this is an intro ...'
    app.stdout = StdOut()

    # Mock out the input call so we don't actually wait for a user's response on stdin
    m = mock.MagicMock(name='input', return_value='quit')
    sm.input = m

    # Need to patch sys.argv so cmd2 doesn't think it was called with arguments equal to the py.test args
    testargs = ["prog"]
    expected = app.intro + '\n{}'.format(app.prompt)
    with mock.patch.object(sys, 'argv', testargs):
        # Run the command loop
        app.cmdloop()
    out = app.stdout.buffer
    assert out == expected