import os
from textwrap import dedent
from zipfile import ZipFile

import pytest

from wheel.cli.pack import pack

THISDIR = os.path.dirname(__file__)
TESTWHEEL_NAME = "test-1.0-py2.py3-none-any.whl"
TESTWHEEL_PATH = os.path.join(THISDIR, "..", "testdata", TESTWHEEL_NAME)


@pytest.mark.filterwarnings("error:Duplicate name")
@pytest.mark.parametrize(
    "build_tag_arg, existing_build_tag, filename",
    [
        (None, None, "test-1.0-py2.py3-none-any.whl"),
        ("2b", None, "test-1.0-2b-py2.py3-none-any.whl"),
        (None, "3", "test-1.0-3-py2.py3-none-any.whl"),
        ("", "3", "test-1.0-py2.py3-none-any.whl"),
    ],
    ids=["nobuildnum", "newbuildarg", "oldbuildnum", "erasebuildnum"],
)
def test_pack(tmpdir_factory, tmpdir, build_tag_arg, existing_build_tag, filename):
    unpack_dir = tmpdir_factory.mktemp("wheeldir")
    with ZipFile(TESTWHEEL_PATH) as zf:
        old_record = zf.read("test-1.0.dist-info/RECORD")
        old_record_lines = sorted(
            line.rstrip()
            for line in old_record.split(b"\n")
            if line and not line.startswith(b"test-1.0.dist-info/WHEEL,")
        )
        zf.extractall(str(unpack_dir))

    if existing_build_tag:
        # Add the build number to WHEEL
        wheel_file_path = unpack_dir.join("test-1.0.dist-info").join("WHEEL")
        wheel_file_content = wheel_file_path.read_binary()
        assert b"Build" not in wheel_file_content
        wheel_file_content += b"Build: 3\r\n"
        wheel_file_path.write_binary(wheel_file_content)

    pack(str(unpack_dir), str(tmpdir), build_tag_arg)
    new_wheel_path = tmpdir.join(filename)
    assert new_wheel_path.isfile()

    with ZipFile(str(new_wheel_path)) as zf:
        new_record = zf.read("test-1.0.dist-info/RECORD")
        new_record_lines = sorted(
            line.rstrip()
            for line in new_record.split(b"\n")
            if line and not line.startswith(b"test-1.0.dist-info/WHEEL,")
        )

        new_wheel_file_content = zf.read("test-1.0.dist-info/WHEEL")

    assert new_record_lines == old_record_lines

    expected_build_num = build_tag_arg or existing_build_tag
    expected_wheel_content = dedent(
        """\
        Wheel-Version: 1.0
        Generator: bdist_wheel (0.30.0)
        Root-Is-Purelib: false
        Tag: py2-none-any
        Tag: py3-none-any
    """.replace(
            "\n", "\r\n"
        )
    )
    if expected_build_num:
        expected_wheel_content += "Build: %s\r\n" % expected_build_num

    expected_wheel_content = expected_wheel_content.encode("ascii")
    assert new_wheel_file_content == expected_wheel_content