import * as fs from 'node:fs/promises';
import { basename } from 'node:path';

function getEnv(name) {
    const val = process.env[name];
    if (!val) {
        throw new Error(`Environment variable ${name} is empty`);
    }
    return val;
}

async function fetchJSON(url, options) {
    const resp = await fetch(url, options);
    if (!resp.ok) {
        throw new Error(`Unexpected HTTP status: ${resp.status}`, {
            cause: {
                status: resp.status,
                body: await resp.text(),
            },
        });
    }
    return await resp.json();
}

async function postJSON(url, token, payload) {
    return fetchJSON(url, {
        method: "POST",
        headers: {
            "Authorization": `token ${token}`,
            "Content-Type": "application/json",
        },
        body: JSON.stringify(payload),
    });
}

async function postFile(url, token, files) {
    const formData = new FormData();
    for (const [name, path] of Object.entries(files)) {
        const fileBuffer = await fs.readFile(path);
        const fileObject = new File([fileBuffer], basename(path), { type: 'application/octet-stream' });
        formData.append(name, fileObject)
    }
    return await fetchJSON(url, {
        method: "POST",
        headers: {
            "Authorization": `token ${token}`,
        },
        body: formData,
    });
}

async function canRead(path) {
    try {
        await fs.access(path, fs.constants.R_OK);
        return true;
    } catch {
        return false;
    }
}

async function main() {
    const path = process.argv[2];
    if (!path || !canRead(path)) {
        throw Error(`Path ${path} is undefined or inaccessible, use node release.js <path>`);
    }
    const token = getEnv("GITEA_RELEASE_TOKEN");
    const tag = getEnv("CI_COMMIT_TAG");
    const repo = getEnv("CI_REPO");

    console.log("Creating release...");
    const releaseData = await postJSON(`https://git.sbstp.ca/api/v1/repos/${repo}/releases`, token, {
        name: `Release ${tag}`,
        tag_name: tag,
        target_commitish: tag,
        draft: false,
        prerelease: false,
    });
    console.log(`Created release ID ${releaseData.id}`);

    console.log("Uploading asset...");
    const assetData = await postFile(`https://git.sbstp.ca/api/v1/repos/${repo}/releases/${releaseData.id}/assets?name=${basename(path)}`, token, {
        attachment: path,
    });
    console.log("Asset uploaded:", assetData);
}

try {
    await main();
} catch (err) {
    console.error(err);
}