#!/usr/bin/env python3
"""
Update bootc.spec file with new version and changelog entry
"""

import re
import sys
from datetime import datetime
from pathlib import Path


def update_spec(spec_path: str, version: str, jira_ticket: str, author: str = None) -> None:
    """
    Update spec file with new version and changelog entry.

    Args:
        spec_path: Path to the spec file
        version: New version number (e.g., "1.5.2")
        jira_ticket: JIRA ticket number (e.g., "RHEL-104567")
        author: Changelog author (default: bootc-release-bot)
    """
    if author is None:
        author = "bootc-release-bot <bootc-release-bot@redhat.com>"

    spec_file = Path(spec_path)
    if not spec_file.exists():
        print(f"Error: Spec file not found: {spec_path}", file=sys.stderr)
        sys.exit(1)

    content = spec_file.read_text()

    # Update Version field (preserve spacing)
    content = re.sub(
        r'^(Version:\s+).*',
        rf'\g<1>{version}',
        content,
        flags=re.MULTILINE
    )

    # Update Release field to 1%{?dist}
    content = re.sub(
        r'^(Release:\s+).*',
        r'\g<1>1%{?dist}',
        content,
        flags=re.MULTILINE
    )

    # Generate changelog entry
    date_str = datetime.now().strftime('%a %b %d %Y')
    changelog_entry = f"""* {date_str} {author} - {version}-1
- Update to {version}
- Resolves: #{jira_ticket}

"""

    # Insert after %changelog line
    content = re.sub(
        r'(%changelog\n)',
        rf'\1{changelog_entry}',
        content
    )

    # Write back
    spec_file.write_text(content)
    print(f"Updated {spec_path}:")
    print(f"  Version: {version}")
    print(f"  Release: 1%{{?dist}}")
    print(f"  JIRA: {jira_ticket}")


def main():
    if len(sys.argv) < 4:
        print(f"Usage: {sys.argv[0]} <spec_file> <version> <jira_ticket> [author]", file=sys.stderr)
        print(f"Example: {sys.argv[0]} bootc.spec 1.5.2 RHEL-104567", file=sys.stderr)
        sys.exit(1)

    spec_path = sys.argv[1]
    version = sys.argv[2]
    jira_ticket = sys.argv[3]
    author = sys.argv[4] if len(sys.argv) > 4 else None

    update_spec(spec_path, version, jira_ticket, author)


if __name__ == '__main__':
    main()