"""Test upgrade"""

import os

import pytest


@pytest.mark.parametrize(
    "versions",
    [
        ("1.12.0", "2.5.0"),
        ("1.12.0",),
        ("2.5.0",),
    ],
    ids=[
        "1.12.0 -> 2.5.0 -> latest",
        "1.12.0 -> latest",
        "2.5.0 -> latest",
    ],
)
@pytest.mark.parametrize("submodule", [False, True], ids=["no submodule", "with submodules"])
def test_upgrade(tmpdir, runner, versions, submodule):
    """Upgrade tests"""
    # pylint: disable=too-many-statements
    home = tmpdir.mkdir("HOME")
    env = {"HOME": str(home)}
    runner(["git", "config", "--global", "init.defaultBranch", "master"], env=env)
    runner(["git", "config", "--global", "protocol.file.allow", "always"], env=env)

    if submodule:
        ext_repo = tmpdir.mkdir("ext_repo")
        ext_repo.join("afile").write("some data")

        for cmd in (("init",), ("add", "afile"), ("commit", "-m", "test")):
            run = runner(["git", "-C", str(ext_repo), *cmd])
            assert run.success

    os.environ.pop("XDG_CONFIG_HOME", None)
    os.environ.pop("XDG_DATA_HOME", None)

    def run_version(version, *args, check_stderr=True):
        yadm = f"yadm-{version}" if version else "/yadm/yadm"
        run = runner([yadm, *args], shell=True, cwd=str(home), env=env)
        assert run.success
        if check_stderr:
            assert run.err == ""
        return run

    # Initialize the repo with the first version
    first = versions[0]
    run_version(first, "init")

    home.join("file").write("some data")
    run_version(first, "add", "file")
    run_version(first, "commit", "-m", '"First commit"')

    if submodule:
        # When upgrading via 2.5.0 we can't have a submodule that's been added
        # after being cloned as 2.5.0 fails the upgrade in that case.
        can_upgrade_cloned_submodule = "2.5.0" not in versions[1:]
        if can_upgrade_cloned_submodule:
            # Check out a repo and then add it as a submodule
            run = runner(["git", "-C", str(home), "clone", str(ext_repo), "b"])
            assert run.success
            run_version(first, "submodule", "add", str(ext_repo), "b")

        # Add submodule without first checking it out
        run_version(first, "submodule", "add", str(ext_repo), "a", check_stderr=False)
        run_version(first, "submodule", "add", str(ext_repo), "c", check_stderr=False)

        run_version(first, "commit", "-m", '"Add submodules"')

    for path in (".yadm", ".config/yadm"):
        yadm_dir = home.join(path)
        if yadm_dir.exists():
            break

    yadm_dir.join("bootstrap").write("init stuff")
    run_version(first, "add", yadm_dir.join("bootstrap"))
    run_version(first, "commit", "-m", "bootstrap")

    yadm_dir.join("encrypt").write("secret")

    hooks_dir = yadm_dir.mkdir("hooks")
    hooks_dir.join("pre_status").write("status")
    hooks_dir.join("post_commit").write("commit")

    run_version(first, "config", "local.class", "test")
    run_version(first, "config", "foo.bar", "true")

    # Run upgrade with intermediate versions and latest
    latest = None
    for version in versions[1:] + (latest,):
        run = run_version(version, "upgrade", check_stderr=not submodule)
        if submodule:
            lines = run.err.splitlines()
            if can_upgrade_cloned_submodule:
                assert "Migrating git directory of" in lines[0]
                assert str(home.join("b/.git")) in lines[1]
                assert str(yadm_dir.join("repo.git/modules/b")) in lines[2]
                del lines[:3]
            for line in lines:
                assert line.startswith("Submodule")
                assert "registered for path" in line

    # Verify result for the final upgrade
    run_version(latest, "status")

    run = run_version(latest, "show", "HEAD:file")
    assert run.out == "some data"

    if submodule:
        if can_upgrade_cloned_submodule:
            assert home.join("b/afile").read() == "some data"
        assert home.join("a/afile").read() == "some data"
        assert home.join("c/afile").read() == "some data"

    yadm_dir = home.join(".config/yadm")

    assert yadm_dir.join("bootstrap").read() == "init stuff"
    assert yadm_dir.join("encrypt").read() == "secret"

    hooks_dir = yadm_dir.join("hooks")
    assert hooks_dir.join("pre_status").read() == "status"
    assert hooks_dir.join("post_commit").read() == "commit"

    run = run_version(latest, "config", "local.class")
    assert run.out.rstrip() == "test"

    run = run_version(latest, "config", "foo.bar")
    assert run.out.rstrip() == "true"