"""
Entry point module to run code-coverage.
"""


def is_valid_py_file(path):
    """
    Checks whether the file can be read by the coverage module. This is especially
    needed for .pyx files and .py files with syntax errors.
    """
    import os

    is_valid = False
    if os.path.isfile(path) and not os.path.splitext(path)[1] == ".pyx":
        try:
            with open(path, "rb") as f:
                compile(f.read(), path, "exec")
                is_valid = True
        except:
            pass
    return is_valid


def execute():
    import os
    import sys

    files = None
    if "combine" not in sys.argv:
        if "--pydev-analyze" in sys.argv:
            # Ok, what we want here is having the files passed through stdin (because
            # there may be too many files for passing in the command line -- we could
            # just pass a dir and make the find files here, but as that's already
            # given in the java side, let's just gather that info here).
            sys.argv.remove("--pydev-analyze")
            s = input()
            s = s.replace("\r", "")
            s = s.replace("\n", "")

            files = []
            invalid_files = []
            for v in s.split("|"):
                if is_valid_py_file(v):
                    files.append(v)
                else:
                    invalid_files.append(v)
            if invalid_files:
                sys.stderr.write("Invalid files not passed to coverage: %s\n" % ", ".join(invalid_files))

            # Note that in this case we'll already be in the working dir with the coverage files,
            # so, the coverage file location is not passed.

        else:
            # For all commands, the coverage file is configured in pydev, and passed as the first
            # argument in the command line, so, let's make sure this gets to the coverage module.
            os.environ["COVERAGE_FILE"] = sys.argv[1]
            del sys.argv[1]

    try:
        import coverage  # @UnresolvedImport
    except:
        sys.stderr.write("Error: coverage module could not be imported\n")
        sys.stderr.write("Please make sure that the coverage module (http://nedbatchelder.com/code/coverage/)\n")
        sys.stderr.write("is properly installed in your interpreter: %s\n" % (sys.executable,))

        import traceback

        traceback.print_exc()
        return

    if hasattr(coverage, "__version__"):
        version = tuple(map(int, coverage.__version__.split(".")[:2]))
        if version < (4, 3):
            sys.stderr.write(
                "Error: minimum supported coverage version is 4.3."
                "\nFound: %s\nLocation: %s\n" % (".".join(str(x) for x in version), coverage.__file__)
            )
            sys.exit(1)
    else:
        sys.stderr.write("Warning: Could not determine version of python module coverage.\nEnsure coverage version is >= 4.3\n")

    from coverage.cmdline import main  # @UnresolvedImport

    if files is not None:
        sys.argv.append("xml")
        sys.argv += files

    main()


if __name__ == "__main__":
    execute()
