const langColorsRes = await fetch("https://cdn.jsdelivr.net/gh/anuraghazra/github-readme-stats@refs/heads/master/src/common/languageColors.json");
const langColors: Record<string, string> = await langColorsRes.json();

type repo = {
    language: string
}
type repos = repo[]

const getTopLangs = async (type: "users" | "orgs", name: string) => {
    const obj: Record<string, number> = {}
    const repoResp = await fetch(`https://git.creations.works/api/v1/${type}/${name}/repos?limit=0`);
    const repos = await repoResp.json() as repos | { message: string };

    if ("message" in repos) {
        throw new Error(repos.message);
    }

    for (const repo of repos) {
        const lang = repo.language;

        if (obj[lang] && lang !== "") {
            obj[lang]++;
        } else if (lang !== "") {
            obj[lang] = 1;
        }
    }

    return calculatePercent(obj);
}

const calculatePercent = (obj: Record<string, number>) => {
    const totalHits = Object.values(obj).reduce((acc, curr) => acc + curr, 0);
    const percentages: Record<string, string> = {};

    for (const [category, hits] of Object.entries(obj)) {
        const percent = (hits / totalHits) * 100;
        percentages[category] = percent.toFixed(2);
    }

    return percentages;
}

const makeSVG = (data: Record<string, string>) => {
    const svgContent = Object.entries(data)
        .map(([language, percentage], index) => {
            const color = langColors[language] || "#111111";
            const circleY = 60 + (index * 25); // Adjust Y position for each language

            return `<circle cx="60" cy="${circleY}" r="10" fill="${color}" /><text x="80" y="${circleY + 5}" fill="#cbd0da">${language}: ${percentage}%</text>`;
        })
        .join('');

    return `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%">${svgContent}</svg>`;
}

Bun.serve({
    async fetch(request, server) {
        const { searchParams } = new URL(request.url);

        const type = searchParams.get("type") as "users" | "orgs";
        const name = searchParams.get("name") as string;

        if (!type) {
            return new Response("Please provide a type parameter, users or orgs", { status: 400 });
        }

        if (type !== "users" && type !== "orgs") {
            return new Response("Type parameter must be either users or orgs", { status: 400 });
        }

        if (!name) {
            return new Response("Please provide a name parameter", { status: 400 });
        }

        const data = await getTopLangs(type, name);

        return new Response(makeSVG(data), {
            headers: {
                "Content-Type": "image/svg+xml"
            }
        });
    },
})