import copy

from pycalver import config
from pycalver import rewrite
from pycalver import version

from . import util

REWRITE_FIXTURE = """
# SPDX-License-Identifier: MIT
__version__ = "v201809.0002-beta"
"""


def test_rewrite_lines():
    old_lines = REWRITE_FIXTURE.splitlines()
    patterns  = ['__version__ = "{pycalver}"']
    new_vinfo = version.parse_version_info("v201911.0003")
    new_lines = rewrite.rewrite_lines(patterns, new_vinfo, old_lines)

    assert len(new_lines) == len(old_lines)
    assert "v201911.0003" not in "\n".join(old_lines)
    assert "v201911.0003" in "\n".join(new_lines)


def test_rewrite_final():
    # Patterns written with {release_tag} placeholder preserve
    # the release tag even if the new version is -final

    old_lines = REWRITE_FIXTURE.splitlines()
    patterns  = ['__version__ = "v{year}{month}.{build_no}-{release_tag}"']
    new_vinfo = version.parse_version_info("v201911.0003")
    new_lines = rewrite.rewrite_lines(patterns, new_vinfo, old_lines)

    assert len(new_lines) == len(old_lines)
    assert "v201911.0003" not in "\n".join(old_lines)
    assert "None" not in "\n".join(new_lines)
    assert "v201911.0003-final" in "\n".join(new_lines)


def test_iter_file_paths():
    with util.Project(project="a") as project:
        ctx = config.init_project_ctx(project.dir)
        cfg = config.parse(ctx)
        assert cfg

        file_paths = {
            str(file_path) for file_path, patterns in rewrite._iter_file_paths(cfg.file_patterns)
        }

    assert file_paths == {"pycalver.toml", "README.md"}


def test_iter_file_globs():
    with util.Project(project="b") as project:
        ctx = config.init_project_ctx(project.dir)
        cfg = config.parse(ctx)
        assert cfg

        file_paths = {
            str(file_path) for file_path, patterns in rewrite._iter_file_paths(cfg.file_patterns)
        }

    assert file_paths == {
        "setup.cfg",
        "setup.py",
        "README.rst",
        "src/module_v1/__init__.py",
        "src/module_v2/__init__.py",
    }


def test_error_bad_path():
    with util.Project(project="b") as project:
        ctx = config.init_project_ctx(project.dir)
        cfg = config.parse(ctx)
        assert cfg

        (project.dir / "setup.py").unlink()
        try:
            list(rewrite._iter_file_paths(cfg.file_patterns))
            assert False, "expected IOError"
        except IOError as ex:
            assert "setup.py" in str(ex)


def test_error_bad_pattern():
    with util.Project(project="b") as project:
        ctx = config.init_project_ctx(project.dir)
        cfg = config.parse(ctx)
        assert cfg

        patterns = copy.deepcopy(cfg.file_patterns)
        patterns["setup.py"] = patterns["setup.py"][0] + "invalid"

        try:
            new_vinfo = version.parse_version_info("v201809.1234")
            list(rewrite.diff(new_vinfo, patterns))
            assert False, "expected rewrite.NoPatternMatch"
        except rewrite.NoPatternMatch as ex:
            assert "setup.py" in str(ex)


OPTIONAL_RELEASE_FIXTURE = """
# SPDX-License-Identifier: BSD
__version__ = "2018.0002-beta"
"""


def test_optional_release():
    old_lines = OPTIONAL_RELEASE_FIXTURE.splitlines()
    pattern   = "{year}.{build_no}{release}"
    patterns  = ['__version__ = "{year}.{build_no}{release}"']

    new_vinfo = version.parse_version_info("2019.0003", pattern)
    new_lines = rewrite.rewrite_lines(patterns, new_vinfo, old_lines)

    assert len(new_lines) == len(old_lines)
    assert "2019.0003" not in "\n".join(old_lines)
    new_text = "\n".join(new_lines)
    assert "2019.0003" in new_text

    new_vinfo = version.parse_version_info("2019.0004-beta", pattern)
    new_lines = rewrite.rewrite_lines(patterns, new_vinfo, old_lines)

    # make sure optional release tag is added back on
    assert len(new_lines) == len(old_lines)
    assert "2019.0004-beta" not in "\n".join(old_lines)
    assert "2019.0004-beta" in "\n".join(new_lines)