const t = require("ava");
const fs = require("fs-extra");
const path = require("path");

const PR_AUTHOR = process.env.PR_AUTHOR;
const MODIFIED_FILES = (process.env.MODIFIED_FILES || "").split(" ").map(file => file.replace(/^domains\//, ""));
const EVENT = process.env.EVENT;
const RUN_ID = process.env.RUN_ID;

const domainsPath = path.resolve("domains");
const headDomainsPath = path.resolve(`register-${RUN_ID}/domains`);

const admins = require("../util/administrators.json");

async function getFileContent(basePath, fileName) {
    try {
        return await fs.readJson(path.join(basePath, fileName));
    } catch (err) {
        return null;
    }
}

t("Modified JSON files must be owned by the PR author", async (t) => {
    if (EVENT !== "pull_request") return t.pass();

    await Promise.all(
        MODIFIED_FILES.map(async (file) => {
            const modifiedDomain = await getFileContent(domainsPath, file);
            const currentDomain = (await getFileContent(headDomainsPath, file)) || modifiedDomain;

            if (!modifiedDomain || !currentDomain) {
                t.fail(`${file}: Unable to read domain data`);
                return;
            }

            t.true(
                currentDomain.owner.username === PR_AUTHOR || admins.includes(PR_AUTHOR),
                `${file}: Domain owner is ${currentDomain.owner.username} but ${PR_AUTHOR} is the PR author`
            );
        })
    );

    t.pass();
});

t("New JSON files must be owned by the PR author", async (t) => {
    if (EVENT !== "pull_request") return t.pass();

    const headDomainsFiles = fs.readdirSync(headDomainsPath);
    
    const newFiles = domainsPath.filter((file) => !fs.existsSync(path.join(headDomainsFiles, file)));

    await Promise.all(
        newFiles.map(async (file) => {
            const domain = await getFileContent(domainsPath, file);

            if (!domain) {
                t.fail(`${file}: Unable to read domain data`);
                return;
            }

            t.true(
                domain.owner.username === PR_AUTHOR || admins.includes(PR_AUTHOR),
                `${file}: Domain owner is ${domain.owner.username} but ${PR_AUTHOR} is the PR author`
            );
        })
    );

    t.pass();
});