#!/usr/bin/env python3

import sys
import json
import os
from collections import defaultdict

CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
PARENT_DIR = os.path.abspath(os.path.join(CURRENT_DIR, os.pardir))
if CURRENT_DIR not in sys.path:
    sys.path.append(CURRENT_DIR)
if PARENT_DIR not in sys.path:
    sys.path.append(PARENT_DIR)

from common import load_articles, MONTH_LABELS, write_result  # noqa: E402


def main():
    try:
        payload = json.load(sys.stdin)
    except Exception as exc:  # noqa: BLE001
        print(f"Failed to read JSON: {exc}", file=sys.stderr)
        sys.exit(1)

    content_dir = payload.get("contentDir") or "content"
    output_path = payload.get("outputPath")
    public_path = payload.get("publicPath")

    articles = load_articles(content_dir)

    counts = defaultdict(int)
    years = set()
    first = None
    last = None

    for article in articles:
        date = article.get("date")
        if not date:
            continue
        year = date.year
        month = date.month
        years.add(year)
        counts[(year, month)] += 1
        if not first or date < first:
            first = date
        if not last or date > last:
            last = date

    month_numbers = list(range(1, 13))
    labels = [MONTH_LABELS[m - 1] for m in month_numbers]
    sorted_years = sorted(years)

    series = []
    for year in sorted_years:
        values = [counts.get((year, m), 0) for m in month_numbers]
        series.append({"label": str(year), "values": values})

    # Render via shared renderer
    try:
        from lib.render_stats_charts import render_articles_per_month, setup_rcparams
    except ImportError as exc:  # noqa: BLE001
        print(f"Failed to import renderer: {exc}", file=sys.stderr)
        sys.exit(1)

    setup_rcparams()
    render_articles_per_month({"labels": labels, "series": series, "title": "Articles par mois"}, output_path)

    write_result(
        {
            "image": public_path,
            "meta": {
                "from": first.isoformat() if first else None,
                "to": last.isoformat() if last else None,
                "months": len(labels),
            },
        }
    )


if __name__ == "__main__":
    main()