# Copyright (C) 2012-2021 jrnl contributors
# License: https://www.gnu.org/licenses/gpl-3.0.html

from datetime import datetime
import json
import os
import random
import shutil
import string
from unittest.mock import MagicMock
from unittest.mock import patch
from xml.etree import ElementTree

from keyring import set_keyring
from pytest_bdd import given
from pytest_bdd.parsers import parse

from jrnl import __version__
from jrnl.time import __get_pdt_calendar

from .fixtures import FailedKeyring
from .fixtures import TestKeyring


@given(parse("we {editor_method} to the editor if opened\n{editor_input}"))
@given(parse("we {editor_method} nothing to the editor if opened"))
def we_enter_editor(editor_method, editor_input, editor_state):
    file_method = editor_state["intent"]["method"]
    if editor_method == "write":
        file_method = "w+"
    elif editor_method == "append":
        file_method = "a+"
    else:
        assert False, f"Method '{editor_method}' not supported"

    editor_state["intent"] = {"method": file_method, "input": editor_input}


@given(parse('now is "<date_str>"'))
@given(parse('now is "{date_str}"'))
def now_is_str(date_str, mocks):
    class DatetimeMagicMock(MagicMock):
        # needed because jrnl does some reflection on datetime
        def __instancecheck__(self, subclass):
            return isinstance(subclass, datetime)

    def mocked_now(tz=None):
        now = datetime.strptime(date_str, "%Y-%m-%d %I:%M:%S %p")

        if tz:
            time_zone = datetime.utcnow().astimezone().tzinfo
            now = now.replace(tzinfo=time_zone)

        return now

    # jrnl uses two different classes to parse dates, so both must be mocked
    datetime_mock = DatetimeMagicMock(wraps=datetime)
    datetime_mock.now.side_effect = mocked_now

    pdt = __get_pdt_calendar()
    calendar_mock = MagicMock(wraps=pdt)
    calendar_mock.parse.side_effect = lambda date_str_input: pdt.parse(
        date_str_input, mocked_now()
    )

    mocks["datetime"] = patch("datetime.datetime", new=datetime_mock)
    mocks["calendar_parse"] = patch(
        "jrnl.time.__get_pdt_calendar", return_value=calendar_mock
    )


@given("we have a keyring", target_fixture="keyring")
@given(parse("we have a {keyring_type} keyring"), target_fixture="keyring")
def we_have_type_of_keyring(keyring_type):
    if keyring_type == "failed":
        set_keyring(FailedKeyring())
    else:
        set_keyring(TestKeyring())


@given(parse('we use the config "{config_file}"'), target_fixture="config_path")
@given('we use the config "<config_file>"', target_fixture="config_path")
def we_use_the_config(config_file, temp_dir, working_dir):
    # Move into temp dir as cwd
    os.chdir(temp_dir.name)

    # Copy the config file over
    config_source = os.path.join(working_dir, "data", "configs", config_file)
    config_dest = os.path.join(temp_dir.name, config_file)
    shutil.copy2(config_source, config_dest)

    # @todo make this only copy some journals over
    # Copy all of the journals over
    journal_source = os.path.join(working_dir, "data", "journals")
    journal_dest = os.path.join(temp_dir.name, "features", "journals")
    shutil.copytree(journal_source, journal_dest)

    # @todo get rid of this by using default config values
    # merge in version number
    if config_file.endswith("yaml") and os.path.exists(config_dest):
        # Add jrnl version to file for 2.x journals
        with open(config_dest, "a") as cf:
            cf.write("version: {}".format(__version__))

    return config_dest


@given(parse('the config "{config_file}" exists'), target_fixture="config_path")
@given('the config "<config_file>" exists', target_fixture="config_path")
def config_exists(config_file, temp_dir, working_dir):
    config_source = os.path.join(working_dir, "data", "configs", config_file)
    config_dest = os.path.join(temp_dir.name, config_file)
    shutil.copy2(config_source, config_dest)


@given(parse('we use the password "{pw}" if prompted'), target_fixture="password")
def use_password_forever(pw):
    return pw


@given("we create a cache directory", target_fixture="cache_dir")
def create_cache_dir(temp_dir):
    random_str = "".join(random.choices(string.ascii_uppercase + string.digits, k=20))

    dir_path = os.path.join(temp_dir.name, "cache_" + random_str)
    os.mkdir(dir_path)
    return {"exists": True, "path": dir_path}


@given(parse("we parse the output as {language_name}"), target_fixture="parsed_output")
def parse_output_as_language(cli_run, language_name):
    language_name = language_name.upper()
    actual_output = cli_run["stdout"]

    if language_name == "XML":
        parsed_output = ElementTree.fromstring(actual_output)
    elif language_name == "JSON":
        parsed_output = json.loads(actual_output)
    else:
        assert False, f"Language name {language_name} not recognized"

    return {"lang": language_name, "obj": parsed_output}