#!/usr/bin/env python3

"""
Creates an annotated git tag for a given version number.

The tag will include the version number and changes for given version.

Usage: tag_version [version]
"""

import subprocess
import sys
import textwrap
import yaml
import toot

from datetime import date
from os import path
from pkg_resources import get_distribution

path = path.join(path.dirname(path.dirname(path.abspath(__file__))), "changelog.yaml")
with open(path, "r") as f:
    changelog = yaml.safe_load(f)

if len(sys.argv) != 2:
    print("Wrong argument count", file=sys.stderr)
    sys.exit(1)

version = sys.argv[1]

changelog_item = changelog.get(version)
if not changelog_item:
    print(f"Version `{version}` not found in changelog.", file=sys.stderr)
    sys.exit(1)

if toot.__version__ != version:
    print(f"toot.__version__ is `{toot.__version__}`, expected {version}.", file=sys.stderr)
    sys.exit(1)

dist_version = get_distribution('toot').version
if dist_version != version:
    print(f"Version in setup.py is `{dist_version}`, expected {version}.", file=sys.stderr)
    sys.exit(1)

release_date = changelog_item["date"]
changes = changelog_item["changes"]

if not isinstance(release_date, date):
    print(f"Release date not set for version `{version}` in the changelog.", file=sys.stderr)
    sys.exit(1)

commit_message = f"toot {version}\n\n"
for c in changes:
    lines = textwrap.wrap(c, 70)
    initial = True
    for line in lines:
        lead = " *" if initial else "  "
        initial = False
        commit_message += f"{lead} {line}\n"

proc = subprocess.run(["git", "tag", "-a", version, "-m", commit_message])
if proc.returncode != 0:
    sys.exit(1)

print()
print(commit_message)
print()
print(f"Version {version} tagged \\o/")