import re
import sys
from pathlib import Path
from tempfile import TemporaryDirectory
from typing import Dict, List, Optional

import pytest

from aqt.exceptions import CliInputError
from aqt.helper import Settings
from aqt.installer import Cli
from aqt.metadata import MetadataFactory, SimpleSpec, Version


def expected_help(actual, prefix=None):
    expected = "usage: aqt [-h] [-c CONFIG]"
    if prefix is not None:
        return actual.startswith(prefix + expected)
    return actual.startswith(expected)


def test_cli_help(capsys):
    cli = Cli()
    cli.run(["help"])
    out, err = capsys.readouterr()
    assert expected_help(out)


@pytest.mark.parametrize(
    "host, target, arch, version_or_spec, expected_version, is_bad_spec",
    (
        ("windows", "desktop", "wasm_32", "6.1", None, False),
        ("windows", "desktop", "wasm_32", "5.12", None, False),
        ("windows", "desktop", "wasm_32", "5.13", Version("5.13.2"), False),
        ("windows", "desktop", "wasm_32", "5", Version("5.15.2"), False),
        ("windows", "desktop", "wasm_32", "<5.14.5", Version("5.14.2"), False),
        ("windows", "desktop", "mingw32", "6.0", Version("6.0.3"), False),
        ("windows", "winrt", "mingw32", "6", None, False),
        ("windows", "winrt", "mingw32", "bad spec", None, True),
        ("windows", "android", "android_x86", "6", Version("6.1.0"), False),
        ("windows", "desktop", "android_x86", "6", Version("6.5.0"), False),  # does not validate arch
        ("windows", "desktop", "android_fake", "6", Version("6.5.0"), False),  # does not validate arch
    ),
)
def test_cli_determine_qt_version(
    monkeypatch, host, target, arch, version_or_spec: str, expected_version: Version, is_bad_spec: bool
):
    _html = (Path(__file__).parent / "data" / f"{host}-{target}.html").read_text("utf-8")
    monkeypatch.setattr(MetadataFactory, "fetch_http", lambda *args, **kwargs: _html)
    cli = Cli()
    cli._setup_settings()

    if is_bad_spec:
        with pytest.raises(CliInputError) as e:
            Cli._determine_qt_version(version_or_spec, host, target, arch)
        assert e.type == CliInputError
        assert format(e.value) == f"Invalid version or SimpleSpec: '{version_or_spec}'\n" + SimpleSpec.usage()
    elif not expected_version:
        with pytest.raises(CliInputError) as e:
            Cli._determine_qt_version(version_or_spec, host, target, arch)
        assert e.type == CliInputError
        expect_msg = f"No versions of Qt exist for spec={version_or_spec} with host={host}, target={target}, arch={arch}"
        actual_msg = format(e.value)
        assert actual_msg == expect_msg
    else:
        ver = Cli._determine_qt_version(version_or_spec, host, target, arch)
        assert ver == expected_version


@pytest.mark.parametrize(
    "invalid_version",
    ("5.15", "five-dot-fifteen", "5", "5.5.5.5"),
)
def test_cli_invalid_version(capsys, invalid_version):
    """Checks that invalid version strings are handled properly"""

    # Ensure that invalid_version cannot be a semantic_version.Version
    with pytest.raises(ValueError):
        Version(invalid_version)

    cli = Cli()
    cli._setup_settings()

    matcher = re.compile(
        #  r"^INFO    : aqtinstall\(aqt\) v.* on Python 3.*\n"
        r"(.*\n)*"
        r"ERROR   :.*Invalid version: '" + invalid_version + r"'! Please use the form '5\.X\.Y'\.\n.*"
    )

    for cmd in (("list-qt", "mac", "desktop", "--arch", invalid_version),):
        cli = Cli()
        assert cli.run(cmd) == 1
        out, err = capsys.readouterr()
        sys.stdout.write(out)
        sys.stderr.write(err)
        assert matcher.match(err)


@pytest.mark.parametrize(
    "version, allow_latest, allow_empty, allow_minus, expect_ok",
    (
        ("1.2.3", False, False, False, True),
        ("1.2.", False, False, False, False),
        ("latest", True, False, False, True),
        ("latest", False, False, False, False),
        ("", False, True, False, True),
        ("", False, False, False, False),
        ("1.2.3-0-123", False, False, True, True),
        ("1.2.3-0-123", False, False, False, False),
    ),
)
def test_cli_validate_version(version: str, allow_latest: bool, allow_empty: bool, allow_minus: bool, expect_ok: bool):
    if expect_ok:
        Cli._validate_version_str(version, allow_latest=allow_latest, allow_empty=allow_empty, allow_minus=allow_minus)
    else:
        with pytest.raises(CliInputError) as err:
            Cli._validate_version_str(version, allow_latest=allow_latest, allow_empty=allow_empty, allow_minus=allow_minus)
        assert err.type == CliInputError


def test_cli_check_mirror():
    cli = Cli()
    cli._setup_settings()
    assert cli._check_mirror(None)
    arg = ["install-qt", "linux", "desktop", "5.11.3", "-b", "https://download.qt.io/"]
    args = cli.parser.parse_args(arg)
    assert args.base == "https://download.qt.io/"
    assert cli._check_mirror(args.base)


@pytest.mark.parametrize(
    "arch, host, target, version, expect",
    (
        ("impossible_arch", "windows", "desktop", "6.2.0", "impossible_arch"),
        ("", "windows", "desktop", "6.2.0", None),
        (None, "windows", "desktop", "6.2.0", None),
        (None, "linux", "desktop", "6.2.0", "gcc_64"),
        (None, "mac", "desktop", "6.2.0", "clang_64"),
        (None, "mac", "ios", "6.2.0", "ios"),
        (None, "mac", "android", "6.2.0", "android"),
        (None, "mac", "android", "5.12.0", None),
        # SimpleSpec instead of Version
        ("impossible_arch", "windows", "desktop", "6.2", "impossible_arch"),
        ("", "windows", "desktop", "6.2", None),
        (None, "windows", "desktop", "6.2", None),
        (None, "linux", "desktop", "6.2", "gcc_64"),
        (None, "mac", "desktop", "6.2", "clang_64"),
        (None, "mac", "ios", "6.2", "ios"),
        (None, "mac", "android", "6.2", None),  # No way to determine arch for android target w/o version
    ),
)
def test_set_arch(arch: Optional[str], host: str, target: str, version: str, expect: Optional[str]):
    if not expect:
        with pytest.raises(CliInputError) as e:
            Cli._set_arch(arch, host, target, version)
        assert e.type == CliInputError
        assert format(e.value) == "Please supply a target architecture."
        assert e.value.should_show_help is True
    else:
        assert Cli._set_arch(arch, host, target, version) == expect


@pytest.mark.parametrize(
    "cmd, expect_msg, should_show_help",
    (
        (
            "install-qt mac ios 6.2.0 --base not_a_url",
            "The `--base` option requires a url where the path `online/qtsdkrepository` exists.",
            True,
        ),
        (
            "install-qt mac ios 6.2.0 --noarchives",
            "When `--noarchives` is set, the `--modules` option is mandatory.",
            False,
        ),
        (
            "install-qt mac ios 6.2.0 --noarchives --archives",
            "When `--noarchives` is set, the `--modules` option is mandatory.",
            False,
        ),
        (
            "install-qt mac ios 6.2.0 --noarchives --archives --modules qtcharts",
            "Options `--archives` and `--noarchives` are mutually exclusive.",
            False,
        ),
        (
            "install-src mac ios 6.2.0 --kde",
            "KDE patch: unsupported version!!",
            False,
        ),
    ),
)
def test_cli_input_errors(capsys, cmd, expect_msg, should_show_help):
    cli = Cli()
    cli._setup_settings()
    assert 1 == cli.run(cmd.split())
    out, err = capsys.readouterr()
    if should_show_help:
        assert expected_help(out)
    else:
        assert out == ""
    assert err.rstrip().endswith(expect_msg)


@pytest.mark.parametrize(
    "cmd, expect_err",
    (
        (
            "list-qt mac --extension wasm",
            "WARNING : The parameter 'extension' with value 'wasm' is deprecated "
            "and marked for removal in a future version of aqt.\n"
            "In the future, please omit this parameter.\n"
            "WARNING : The '--extension' flag will be ignored.\n",
        ),
        (
            "list-qt mac desktop --extensions 6.2.0",
            "WARNING : The parameter 'extensions' with value '6.2.0' is deprecated "
            "and marked for removal in a future version of aqt.\n"
            "In the future, please omit this parameter.\n"
            "WARNING : The '--extensions' flag will always return an empty list, "
            "because there are no useful arguments for the '--extension' flag.\n",
        ),
    ),
)
def test_cli_list_qt_deprecated_flags(capsys, cmd: str, expect_err: str):
    cli = Cli()
    cli._setup_settings()
    assert 0 == cli.run(cmd.split())
    out, err = capsys.readouterr()
    assert err == expect_err


def test_cli_unexpected_error(monkeypatch, capsys):
    def _mocked_run(*args):
        raise RuntimeError("Some unexpected error")

    monkeypatch.setattr("aqt.installer.Cli.run_install_qt", _mocked_run)

    cli = Cli()
    cli._setup_settings()
    assert Cli.UNHANDLED_EXCEPTION_CODE == cli.run(["install-qt", "mac", "ios", "6.2.0"])
    out, err = capsys.readouterr()
    assert err.startswith("ERROR   : Some unexpected error")
    assert err.rstrip().endswith(
        "===========================PLEASE FILE A BUG REPORT===========================\n"
        "You have discovered a bug in aqt.\n"
        "Please file a bug report at https://github.com/miurahr/aqtinstall/issues\n"
        "Please remember to include a copy of this program's output in your report."
    )


@pytest.mark.parametrize("external_tool_exists", (True, False))
def test_set_7zip_checks_external_tool_when_specified(monkeypatch, capsys, external_tool_exists: bool):
    cli = Cli()
    cli._setup_settings()
    external = "my_7z_extractor"

    def mock_subprocess_run(args, **kwargs):
        assert args[0] == external
        if not external_tool_exists:
            raise FileNotFoundError()

    monkeypatch.setattr("aqt.installer.subprocess.run", mock_subprocess_run)
    monkeypatch.setattr("aqt.installer.EXT7Z", False)
    if external_tool_exists:
        assert external == cli._set_sevenzip(external)
    else:
        with pytest.raises(CliInputError) as err:
            cli._set_sevenzip(external)
        assert format(err.value) == format(f"Specified 7zip command executable does not exist: '{external}'")
    assert capsys.readouterr()[1] == ""


@pytest.mark.parametrize("fallback_exists", (True, False))
def test_set_7zip_uses_fallback_when_py7zr_missing(monkeypatch, capsys, fallback_exists: bool):
    cli = Cli()
    cli._setup_settings()
    external, fallback = None, Settings.zipcmd

    def mock_subprocess_run(args, **kwargs):
        assert args[0] == fallback
        if not fallback_exists:
            raise FileNotFoundError()

    monkeypatch.setattr("aqt.installer.subprocess.run", mock_subprocess_run)
    monkeypatch.setattr("aqt.installer.EXT7Z", True)
    if fallback_exists:
        assert fallback == cli._set_sevenzip(external)
    else:
        with pytest.raises(CliInputError) as err:
            cli._set_sevenzip(external)
        assert format(err.value) == format(f"Fallback 7zip command executable does not exist: '{fallback}'")
    assert f"Falling back to '{fallback}'" in capsys.readouterr()[1]


@pytest.mark.parametrize("fallback_exists", (True, False))
def test_set_7zip_chooses_p7zr_when_ext_missing(monkeypatch, capsys, fallback_exists: bool):
    cli = Cli()
    cli._setup_settings()
    external = None

    def mock_subprocess_run(args, **kwargs):
        assert False, "Should not try to run anything"

    monkeypatch.setattr("aqt.installer.subprocess.run", mock_subprocess_run)
    monkeypatch.setattr("aqt.installer.EXT7Z", False)
    assert cli._set_sevenzip(external) is None
    assert capsys.readouterr()[1] == ""


@pytest.mark.parametrize(
    "archive_dest, keep, temp_dir, expect, should_make_dir",
    (
        (None, False, "temp", "temp", False),
        (None, True, "temp", ".", False),
        ("my_archives", False, "temp", "my_archives", True),
        ("my_archives", True, "temp", "my_archives", True),
    ),
)
def test_cli_choose_archive_dest(
    monkeypatch, archive_dest: Optional[str], keep: bool, temp_dir: str, expect: str, should_make_dir: bool
):
    enclosed = {"made_dir": False}

    def mock_mkdir(*args, **kwargs):
        enclosed["made_dir"] = True

    monkeypatch.setattr("aqt.installer.Path.mkdir", mock_mkdir)

    assert Cli.choose_archive_dest(archive_dest, keep, temp_dir) == Path(expect)
    assert enclosed["made_dir"] == should_make_dir


@pytest.mark.parametrize(
    "host, target, arch, is_auto, mocked_arches, existing_arch_dirs, expect",
    (
        (  # not installed
            "windows",
            "android",
            "android_armv7",
            False,
            ["win64_mingw99"],
            ["not_mingw"],
            {"install": None, "instruct": "win64_mingw99", "use_dir": "mingw99_64"},
        ),
        (  # Alt Desktop Qt already installed
            "windows",
            "android",
            "android_armv7",
            False,
            ["win64_mingw99"],
            ["mingw128_32"],
            {"install": None, "instruct": None, "use_dir": "mingw128_32"},
        ),
        # not installed
        (
            "linux",
            "android",
            "android_armv7",
            False,
            [],
            ["gcc_32"],
            {"install": None, "instruct": "gcc_64", "use_dir": "gcc_64"},
        ),
        (  # Desktop Qt already installed
            "linux",
            "android",
            "android_armv7",
            False,
            [],
            ["gcc_64"],
            {"install": None, "instruct": None, "use_dir": "gcc_64"},
        ),
        (  # not installed
            "windows",
            "android",
            "android_armv7",
            True,
            ["win64_mingw99"],
            ["not_mingw"],
            {"install": "win64_mingw99", "instruct": None, "use_dir": "mingw99_64"},
        ),
        (  # Alt Desktop Qt already installed
            "windows",
            "android",
            "android_armv7",
            True,
            ["win64_mingw99"],
            ["mingw128_32"],
            {"install": None, "instruct": None, "use_dir": "mingw128_32"},
        ),
        # not installed
        (
            "linux",
            "android",
            "android_armv7",
            True,
            [],
            ["gcc_32"],
            {"install": "gcc_64", "instruct": None, "use_dir": "gcc_64"},
        ),
        (  # Desktop Qt already installed
            "linux",
            "android",
            "android_armv7",
            True,
            [],
            ["gcc_64"],
            {"install": None, "instruct": None, "use_dir": "gcc_64"},
        ),
        (  # MSVC arm64 with --autodesktop: should install min64_msvc2019_64
            "windows",
            "desktop",
            "win64_msvc2019_arm64",
            True,
            ["win64_mingw", "win64_msvc2019_64", "win64_msvc2019_arm64", "wasm_singlethread", "wasm_multithread"],
            ["mingw128_32"],
            {"install": "win64_msvc2019_64", "instruct": None, "use_dir": "msvc2019_64"},
        ),
        (  # MSVC arm64 without --autodesktop: should point to min64_msvc2019_64
            "windows",
            "desktop",
            "win64_msvc2019_arm64",
            False,
            ["win64_mingw", "win64_msvc2019_64", "win64_msvc2019_arm64", "wasm_singlethread", "wasm_multithread"],
            ["mingw128_32"],
            {"install": None, "instruct": "win64_msvc2019_64", "use_dir": "msvc2019_64"},
        ),
        (  # MSVC arm64 without --autodesktop, with correct target already installed
            "windows",
            "desktop",
            "win64_msvc2019_arm64",
            False,
            ["win64_mingw", "win64_msvc2019_64", "win64_msvc2019_arm64", "wasm_singlethread", "wasm_multithread"],
            ["msvc2019_64"],
            {"install": None, "instruct": None, "use_dir": "msvc2019_64"},
        ),
        (  # MSVC arm64 without --autodesktop, with wrong target already installed
            "windows",
            "desktop",
            "win64_msvc2019_arm64",
            False,
            ["win64_mingw", "win64_msvc2019_64", "win64_msvc2019_arm64", "wasm_singlethread", "wasm_multithread"],
            ["mingw128_32"],
            {"install": None, "instruct": "win64_msvc2019_64", "use_dir": "msvc2019_64"},
        ),
    ),
)
def test_get_autodesktop_dir_and_arch_non_android(
    monkeypatch,
    capsys,
    host: str,
    target: str,
    arch: str,
    is_auto: bool,
    mocked_arches: List[str],
    existing_arch_dirs: List[str],
    expect: Dict[str, str],
):
    """
    Updated to handle version parsing and directory validation issues.
    """
    monkeypatch.setattr(MetadataFactory, "fetch_arches", lambda *args: mocked_arches)
    monkeypatch.setattr(Cli, "run", lambda *args: 0)

    version = "6.2.3"
    cli = Cli()
    cli._setup_settings()

    flavor = "MSVC Arm64" if arch == "win64_msvc2019_arm64" else target

    with TemporaryDirectory() as temp_dir:
        base_dir = Path(temp_dir)
        for arch_dir in existing_arch_dirs:
            qmake = base_dir / version / arch_dir / f"bin/qmake{'.exe' if host == 'windows' else ''}"
            qmake.parent.mkdir(parents=True, exist_ok=True)
            qmake.write_text("exe file")

        autodesktop_arch_dir, autodesktop_arch_to_install = cli._get_autodesktop_dir_and_arch(
            is_auto, host, target, base_dir, Version(version), arch
        )

        # Validate directory choice and installation instructions
        assert autodesktop_arch_dir == expect["use_dir"], f"Expected: {expect['use_dir']}, Got: {autodesktop_arch_dir}"

        out, err = capsys.readouterr()
        err_lines = [line for line in err.strip().split("\n") if line]  # Remove empty lines

        qmake = base_dir / version / expect["use_dir"] / f"bin/qmake{'.exe' if host == 'windows' else ''}"
        is_installed = qmake.exists()

        if is_installed:
            assert any("Found installed" in line for line in err_lines), "Expected 'Found installed' message."
        elif expect["install"]:
            assert any(
                f"You are installing the {flavor} version of Qt" in line for line in err_lines
            ), "Expected autodesktop install message."
        elif expect["instruct"]:
            assert any("You can install" in line for line in err_lines), "Expected install instruction message."
