// Mini-Markdown-Renderer für Devlog-Prosa (Discord-Stil): **fett**, *kursiv*,
// `code`, [Links](url), * Bullet-Listen, --- Trenner, ## Überschriften.
// Bewusst ohne Library — Input wird nie als HTML interpretiert, kein Injection.
const TOKEN = /(\*\*[^*]+\*\*|\*[^*]+\*|`[^`]+`|\[[^\]]+\]\(https?:\/\/[^\s)]+\))/g;

function renderInline(text) {
    return text.split(TOKEN).map((part, i) => {
        // Fett/Kursiv rekursiv rendern, damit z. B. Links darin funktionieren
        if (part.startsWith('**') && part.endsWith('**')) {
            return <strong key={i}>{renderInline(part.slice(2, -2))}</strong>;
        }
        if (part.startsWith('*') && part.endsWith('*') && part.length > 2) {
            return <em key={i}>{renderInline(part.slice(1, -1))}</em>;
        }
        if (part.startsWith('`') && part.endsWith('`')) {
            return <code key={i}>{part.slice(1, -1)}</code>;
        }
        const link = part.match(/^\[([^\]]+)\]\((https?:\/\/[^\s)]+)\)$/);
        if (link) {
            return (
                <a key={i} href={link[2]} target="_blank" rel="noreferrer">
                    {link[1]}
                </a>
            );
        }
        return part;
    });
}

/** Devlog-Text als React-Elemente: Absätze, Listen, Trenner, Überschriften */
export function Markdown({ text }) {
    const out = [];
    let para = [];
    let list = [];
    let key = 0;

    const flushPara = () => {
        if (para.length === 0) return;
        out.push(
            <p key={key++}>
                {para.map((line, j) => (
                    <span key={j}>
                        {renderInline(line)}
                        {j < para.length - 1 && <br />}
                    </span>
                ))}
            </p>
        );
        para = [];
    };
    const flushList = () => {
        if (list.length === 0) return;
        out.push(
            <ul key={key++} className="md-list">
                {list.map((item, j) => (
                    <li key={j}>{renderInline(item)}</li>
                ))}
            </ul>
        );
        list = [];
    };

    for (const raw of text.split('\n')) {
        const line = raw.trim();

        if (!line) {
            flushPara();
            flushList();
            continue;
        }
        // --- → Trenner
        if (/^-{3,}$/.test(line)) {
            flushPara();
            flushList();
            out.push(<hr key={key++} className="md-hr" />);
            continue;
        }
        // * Punkt / - Punkt → Liste (aber nicht *kursiv am Zeilenanfang*)
        const li = line.match(/^[*-]\s+(.*)$/);
        if (li) {
            flushPara();
            list.push(li[1]);
            continue;
        }
        // ## Überschrift (1-3 Raute-Ebenen)
        const heading = line.match(/^(#{1,3})\s+(.*)$/);
        if (heading) {
            flushPara();
            flushList();
            out.push(
                <h3 key={key++} className={`md-h md-h${heading[1].length}`}>
                    {renderInline(heading[2])}
                </h3>
            );
            continue;
        }
        flushList();
        para.push(raw);
    }
    flushPara();
    flushList();

    return out;
}