#!/usr/bin/env python3
"""
Generate PR comment for metadata registration check violations.

This script reads violations.json (created by metadata-check.py) and generates
a formatted markdown comment to be posted on the PR. The comment includes:
  - HTML file path that was added but not registered
  - Which metadata files it's missing from (CLASS.TXT.json, ALL_META.TXT.json)
  - Whether the metadata files don't exist or the file is simply missing from them

Usage:
  Run after metadata-check.py fails. Reads violations.json and outputs JSON
  with 'body' field containing the markdown comment text.
"""

import json
import sys


def main():
    try:
        with open("violations.json", "r") as f:
            violations = json.load(f)
    except Exception:
        violations = []

    if not violations:
        print(json.dumps({"body": "No violations to report"}))
        sys.exit(0)

    # Build message
    lines = [
        "❌ **HTML file not registered in metadata**",
        "",
        "The following HTML files were added but are not properly registered in the metadata files:",
        "",
    ]

    for v in violations:
        html_file = v["file"]
        missing_from = v["missing_from"]

        lines.append(f"**{html_file}**")
        for missing in missing_from:
            # Check if it's a "file not found" case
            if "(file not found)" in missing:
                lines.append(
                    f"  ❌ Missing from: `{missing.split(' (')[0]}` (metadata file does not exist)"
                )
            else:
                lines.append(f"  ❌ Missing from: `{missing}`")
        lines.append("")

    lines.append(
        "**Please add the new HTML files to both `CLASS.TXT.json` and `ALL_META.TXT.json` in the same directory.**"
    )

    message = "\n".join(lines)
    print(json.dumps({"body": message}))


if __name__ == "__main__":
    main()