// SPDX-License-Identifier: LGPL-2.1-or-later

const crypto = require("crypto");
const fs = require("fs");
const path = require("path");
const vm = require("vm");

const sampleDirectory = path.resolve(process.argv[2] || "FreeCAD/docs/plugin-sample");
const expectedApiVersion = "1";

function digest(buffer)
{
    return crypto.createHash("sha256").update(buffer).digest("hex");
}

function validatePackage(directory, manifestOverride)
{
    const manifest = manifestOverride || JSON.parse(fs.readFileSync(path.join(directory, "manifest.json"), "utf8"));
    if (manifest.schema !== "freecad-web-plugin/v1" || manifest.apiVersion !== expectedApiVersion
        || !/^[a-z0-9-]+$/.test(manifest.id) || manifest.entry !== "plugin.js") {
        throw new Error("PLUGIN_MANIFEST_INVALID");
    }
    const entryPath = path.join(directory, manifest.entry);
    const source = fs.readFileSync(entryPath);
    if (digest(source) !== manifest.sha256) {
        throw new Error("PLUGIN_HASH_MISMATCH");
    }
    const context = vm.createContext({module: {exports: {}}, exports: {}, require: undefined, process: undefined, globalThis: {}});
    new vm.Script(source.toString("utf8"), {filename: entryPath}).runInContext(context, {timeout: 100});
    const exported = context.module.exports;
    if (!exported || typeof exported.register !== "function") {
        throw new Error("PLUGIN_ENTRY_INVALID");
    }
    const result = exported.register({apiVersion: expectedApiVersion});
    return {manifest, result};
}

const valid = validatePackage(sampleDirectory);
let wrongHash = "none";
try {
    validatePackage(sampleDirectory, {...valid.manifest, sha256: "0".repeat(64)});
}
catch (error) {
    wrongHash = error.message;
}
let wrongVersion = "none";
try {
    validatePackage(sampleDirectory, {...valid.manifest, apiVersion: "999"});
}
catch (error) {
    wrongVersion = error.message;
}
const result = {valid: {id: valid.result.id, commands: valid.result.commands, apiVersion: valid.result.apiVersion}, wrongHash, wrongVersion};
if (result.valid.id !== "freecad-web-part-sample" || result.valid.commands.join(",") !== "box"
    || result.valid.apiVersion !== "1" || result.wrongHash !== "PLUGIN_HASH_MISMATCH"
    || result.wrongVersion !== "PLUGIN_MANIFEST_INVALID") {
    throw new Error(JSON.stringify(result));
}
console.log(JSON.stringify(result));