import contextlib
import io
import os
import random
import re
import socket
import sys

import pytest

PASSWORD_REGEX = re.compile(r"^([a-z]+)(-[a-z]+)?-([a-z]+)(-[a-z]+)?$")


# TODO: Improve the Common tests to test it all as a single class


class TestBuildPassword:
    @pytest.mark.parametrize(
        "test_input,expected",
        (
            # VALID, two lowercase words, separated by a hyphen
            ("syrup-enzyme", True),
            ("caution-friday", True),
            # VALID, two lowercase words, with one hyphenated compound word
            ("drop-down-thimble", True),
            ("unmixed-yo-yo", True),
            # VALID, two lowercase hyphenated compound words, separated by hyphen
            ("yo-yo-drop-down", True),
            ("felt-tip-t-shirt", True),
            ("hello-world", True),
            # INVALID
            ("Upper-Case", False),
            ("digits-123", False),
            ("too-many-hyphens-", False),
            ("symbols-!@#$%", False),
        ),
    )
    def test_build_password_regex(self, test_input, expected):
        """Test that `PASSWORD_REGEX` accounts for the following patterns

        There are a few hyphenated words in `wordlist.txt`:
            * drop-down
            * felt-tip
            * t-shirt
            * yo-yo

        These words cause a few extra potential password patterns:
            * word-word
            * hyphenated-word-word
            * word-hyphenated-word
            * hyphenated-word-hyphenated-word
        """

        assert bool(PASSWORD_REGEX.match(test_input)) == expected

    def test_build_password_unique(self, common_obj, sys_onionshare_dev_mode):
        assert common_obj.build_password() != common_obj.build_password()


class TestDirSize:
    def test_temp_dir_size(self, common_obj, temp_dir_1024_delete):
        """dir_size() should return the total size (in bytes) of all files
        in a particular directory.
        """

        assert common_obj.dir_size(temp_dir_1024_delete) == 1024


class TestEstimatedTimeRemaining:
    @pytest.mark.parametrize(
        "test_input,expected",
        (
            ((2, 676, 12), "8h14m16s"),
            ((14, 1049, 30), "1h26m15s"),
            ((21, 450, 1), "33m42s"),
            ((31, 1115, 80), "11m39s"),
            ((336, 989, 32), "2m12s"),
            ((603, 949, 38), "36s"),
            ((971, 1009, 83), "1s"),
        ),
    )
    def test_estimated_time_remaining(
        self, common_obj, test_input, expected, time_time_100
    ):
        assert common_obj.estimated_time_remaining(*test_input) == expected

    @pytest.mark.parametrize(
        "test_input",
        (
            (10, 20, 100),  # if `time_elapsed == 0`
            (0, 37, 99),  # if `download_rate == 0`
        ),
    )
    def test_raises_zero_division_error(self, common_obj, test_input, time_time_100):
        with pytest.raises(ZeroDivisionError):
            common_obj.estimated_time_remaining(*test_input)


class TestFormatSeconds:
    @pytest.mark.parametrize(
        "test_input,expected",
        (
            (0, "0s"),
            (26, "26s"),
            (60, "1m"),
            (947.35, "15m47s"),
            (1847, "30m47s"),
            (2193.94, "36m34s"),
            (3600, "1h"),
            (13426.83, "3h43m47s"),
            (16293, "4h31m33s"),
            (18392.14, "5h6m32s"),
            (86400, "1d"),
            (129674, "1d12h1m14s"),
            (56404.12, "15h40m4s"),
        ),
    )
    def test_format_seconds(self, common_obj, test_input, expected):
        assert common_obj.format_seconds(test_input) == expected

    # TODO: test negative numbers?
    @pytest.mark.parametrize("test_input", ("string", lambda: None, [], {}, set()))
    def test_invalid_input_types(self, common_obj, test_input):
        with pytest.raises(TypeError):
            common_obj.format_seconds(test_input)


class TestGetAvailablePort:
    @pytest.mark.parametrize(
        "port_min,port_max",
        ((random.randint(1024, 1500), random.randint(1800, 2048)) for _ in range(50)),
    )
    def test_returns_an_open_port(self, common_obj, port_min, port_max):
        """get_available_port() should return an open port within the range"""

        port = common_obj.get_available_port(port_min, port_max)
        assert port_min <= port <= port_max
        with socket.socket() as tmpsock:
            tmpsock.bind(("127.0.0.1", port))


class TestGetPlatform:
    def test_darwin(self, platform_darwin, common_obj):
        assert common_obj.platform == "Darwin"

    def test_linux(self, platform_linux, common_obj):
        assert common_obj.platform == "Linux"

    def test_windows(self, platform_windows, common_obj):
        assert common_obj.platform == "Windows"


class TestGetTorPaths:
    @pytest.mark.skipif(sys.platform != "Darwin", reason="requires MacOS")
    def test_get_tor_paths_darwin(
        self, platform_darwin, common_obj, sys_frozen, sys_meipass
    ):
        base_path = os.path.dirname(
            os.path.dirname(os.path.dirname(common_obj.get_resource_path("")))
        )
        tor_path = os.path.join(base_path, "Resources", "Tor", "tor")
        tor_geo_ip_file_path = os.path.join(base_path, "Resources", "Tor", "geoip")
        tor_geo_ipv6_file_path = os.path.join(base_path, "Resources", "Tor", "geoip6")
        obfs4proxy_file_path = os.path.join(base_path, "Resources", "Tor", "obfs4proxy")
        snowflake_file_path = os.path.join(
            base_path, "Resources", "Tor", "snowflake-client"
        )
        assert common_obj.get_tor_paths() == (
            tor_path,
            tor_geo_ip_file_path,
            tor_geo_ipv6_file_path,
            obfs4proxy_file_path,
            snowflake_file_path,
        )

    @pytest.mark.skipif(sys.platform != "linux", reason="requires Linux")
    def test_get_tor_paths_linux(self, platform_linux, common_obj):
        (
            tor_path,
            tor_geo_ip_file_path,
            tor_geo_ipv6_file_path,
            _,  # obfs4proxy is optional
            _,  # snowflake-client is optional
        ) = common_obj.get_tor_paths()

        assert os.path.basename(tor_path) == "tor"
        assert (
            tor_geo_ip_file_path == "/usr/share/tor/geoip"
            or tor_geo_ip_file_path == "/usr/local/share/tor/geoip"
        )
        assert (
            tor_geo_ipv6_file_path == "/usr/share/tor/geoip6"
            or tor_geo_ipv6_file_path == "/usr/local/share/tor/geoip6"
        )

    @pytest.mark.skipif(sys.platform != "win32", reason="requires Windows")
    def test_get_tor_paths_windows(self, platform_windows, common_obj, sys_frozen):
        base_path = os.path.join(
            os.path.dirname(os.path.dirname(common_obj.get_resource_path(""))),
            "resources",
            "tor",
        )
        tor_path = os.path.join(os.path.join(base_path, "Tor"), "tor.exe")
        obfs4proxy_file_path = os.path.join(
            os.path.join(base_path, "Tor"), "obfs4proxy.exe"
        )
        snowflake_file_path = os.path.join(
            os.path.join(base_path, "Tor"), "snowflake-client.exe"
        )
        tor_geo_ip_file_path = os.path.join(
            os.path.join(os.path.join(base_path, "Data"), "Tor"), "geoip"
        )
        tor_geo_ipv6_file_path = os.path.join(
            os.path.join(os.path.join(base_path, "Data"), "Tor"), "geoip6"
        )
        assert common_obj.get_tor_paths() == (
            tor_path,
            tor_geo_ip_file_path,
            tor_geo_ipv6_file_path,
            obfs4proxy_file_path,
            snowflake_file_path,
        )


class TestHumanReadableFilesize:
    @pytest.mark.parametrize(
        "test_input,expected",
        (
            (1024 ** 0, "1.0 B"),
            (1024 ** 1, "1.0 KiB"),
            (1024 ** 2, "1.0 MiB"),
            (1024 ** 3, "1.0 GiB"),
            (1024 ** 4, "1.0 TiB"),
            (1024 ** 5, "1.0 PiB"),
            (1024 ** 6, "1.0 EiB"),
            (1024 ** 7, "1.0 ZiB"),
            (1024 ** 8, "1.0 YiB"),
        ),
    )
    def test_human_readable_filesize(self, common_obj, test_input, expected):
        assert common_obj.human_readable_filesize(test_input) == expected


class TestLog:
    def test_output(self, common_obj, time_strftime):
        common_obj.verbose = True

        # From: https://stackoverflow.com/questions/1218933
        with io.StringIO() as buf, contextlib.redirect_stdout(buf):
            common_obj.log("TestModule", "dummy_func")
            common_obj.log("TestModule", "dummy_func", "TEST_MSG")
            output = buf.getvalue()

        line_one, line_two, _ = output.split("\n")
        assert (
            "[Jun 06 2013 11:05:00]" in line_one and "TestModule.dummy_func" in line_one
        )
        assert (
            "[Jun 06 2013 11:05:00]" in line_two
            and "TestModule.dummy_func" in line_two
            and "TEST_MSG" in line_two
        )