#!/usr/bin/env node

const { loadArticles } = require("../lib/stats/articles");
const { renderWithPython } = require("../lib/stats/python");

function groupBySection(articles) {
    const counts = new Map();

    for (const article of articles) {
        const key = article.section || "root";
        counts.set(key, (counts.get(key) || 0) + 1);
    }

    const entries = Array.from(counts.entries()).sort((a, b) => b[1] - a[1]);
    return entries;
}

async function run({ contentDir, outputPath, publicPath }) {
    if (!outputPath) {
        throw new Error("outputPath manquant pour articles_per_section");
    }

    const articles = await loadArticles(contentDir || "content");
    const entries = groupBySection(articles);

    const maxSlices = 21;
    const top = entries.slice(0, maxSlices);
    const rest = entries.slice(maxSlices);
    if (rest.length > 0) {
        const restSum = rest.reduce((sum, [, value]) => sum + value, 0);
        top.push(["Others", restSum]);
    }

    const labels = top.map(([key]) => key);
    const values = top.map(([, value]) => value);

    await renderWithPython({
        type: "articles_per_section",
        outputPath,
        data: {
            labels,
            values,
            title: "Articles par section",
        },
    });

    return {
        image: publicPath,
        meta: {
            sections: entries.length,
        },
    };
}

module.exports = { run };