const esbuild = require("esbuild");
const esbuildCopyPlugin = require("esbuild-plugin-copy");
const fs = require("fs");
const zlib = require("zlib");
const ejs = require("ejs");
const archiver = require("archiver");
const dependencies =
  JSON.parse(fs.readFileSync(__dirname + "/package.json")).dependencies || {};
const requiredDependencyList = Object.keys(dependencies);
let dependencyList = Object.keys(dependencies);
const svrjsInfo = JSON.parse(fs.readFileSync(__dirname + "/svrjs.json"));
const { name, version, documentationURL } = svrjsInfo;

// Function to find and add all dependencies into the dependencyList array.
function findAllDependencies(curList) {
  // If no curList parameter is specified, use dependencyList.
  if (!curList) curList = dependencyList;
  curList.forEach((dependency) => {
    const newDeplist = Object.keys(
      JSON.parse(
        fs
          .readFileSync(
            __dirname +
              "/node_modules/" +
              dependency.replace(/\/\.\./g, "") +
              "/package.json",
          )
          .toString(),
      ).dependencies || {},
    );
    let noDupNewDepList = [];
    newDeplist.forEach((dep) => {
      // Ignore duplicates
      if (dependencyList.indexOf(dep) == -1) {
        noDupNewDepList.push(dep);
        dependencyList.push(dep);
      }
    });
    // Call findAllDependencies for the dependency list.
    findAllDependencies(noDupNewDepList);
  });
}

// Get list of all dependencies
findAllDependencies();
dependencyList = dependencyList.sort();

// Create and populate an object, where whenever the dependencies are required are listed.
let dependenciesAreRequired = {};
dependencyList.forEach((dependency) => {
  dependenciesAreRequired[dependency] = false;
});
requiredDependencyList.forEach((dependency) => {
  dependenciesAreRequired[dependency] = true;
});

// Create the template functions using EJS
const layoutTemplate = ejs.compile(
  fs.readFileSync(__dirname + "/templates/layout.ejs").toString(),
);
const testsTemplate = ejs.compile(
  fs.readFileSync(__dirname + "/templates/tests.ejs").toString(),
);
const indexTemplate = ejs.compile(
  fs.readFileSync(__dirname + "/templates/index.ejs").toString(),
);
const licensesTemplate = ejs.compile(
  fs.readFileSync(__dirname + "/templates/licenses.ejs").toString(),
);
const licenseElementTemplate = ejs.compile(
  fs.readFileSync(__dirname + "/templates/licenseElement.ejs").toString(),
);

let licenseElements = "";

// Generate the licenses list in HTML
dependencyList.forEach((dependency) => {
  const packageJSON = JSON.parse(
    fs
      .readFileSync(
        __dirname +
          "/node_modules/" +
          dependency.replace(/\/\.\./g, "") +
          "/package.json",
      )
      .toString(),
  );
  licenseElements += licenseElementTemplate({
    moduleName: packageJSON.name,
    name: name,
    license: packageJSON.license,
    description: packageJSON.description || "No description",
    author: packageJSON.author ? packageJSON.author.name : packageJSON.author,
    required: dependenciesAreRequired[dependency],
  });
});

// Generate pages
const licensesPage = layoutTemplate({
  title: name + " " + version + " Licenses",
  content: licensesTemplate({
    name: name,
    version: version,
    licenses: licenseElements,
  }),
});

const testsPage = layoutTemplate({
  title: name + " " + version + " Tests",
  content: testsTemplate({
    name: name,
    version: version,
  }),
});

const indexPage = layoutTemplate({
  title: name + " " + version,
  content: indexTemplate({
    name: name,
    version: version,
    documentationURL: documentationURL,
  }),
});

// Remove the generated assets directory if exists, and create a new one.
if (fs.existsSync(__dirname + "/generatedAssets")) {
  if (fs.rmSync) fs.rmSync(__dirname + "/generatedAssets", { recursive: true });
  else fs.rmdirSync(__dirname + "/generatedAssets", { recursive: true });
}
fs.mkdirSync(__dirname + "/generatedAssets");

// Remove the dist directory if exists, and create a new one.
if (fs.existsSync(__dirname + "/dist")) {
  if (fs.rmSync) fs.rmSync(__dirname + "/dist", { recursive: true });
  else fs.rmdirSync(__dirname + "/dist", { recursive: true });
}
fs.mkdirSync(__dirname + "/dist");
fs.mkdirSync(__dirname + "/dist/log");
fs.mkdirSync(__dirname + "/dist/mods");
fs.mkdirSync(__dirname + "/dist/temp");

// Remove the out directory if exists, and create a new one.
if (fs.existsSync(__dirname + "/out")) {
  if (fs.rmSync) fs.rmSync(__dirname + "/out", { recursive: true });
  else fs.rmdirSync(__dirname + "/out", { recursive: true });
}
fs.mkdirSync(__dirname + "/out");

// Create a licenses directory
fs.mkdirSync(__dirname + "/generatedAssets/licenses");

// Write to HTML files
fs.writeFileSync(__dirname + "/generatedAssets/index.html", indexPage);
fs.writeFileSync(__dirname + "/generatedAssets/tests.html", testsPage);
fs.writeFileSync(
  __dirname + "/generatedAssets/licenses/index.html",
  licensesPage,
);

// Bundle the source and copy the assets using esbuild and esbuild-plugin-copy
esbuild
  .build({
    entryPoints: ["src/index.js"],
    bundle: true,
    outfile: "dist/svr.js",
    platform: "node",
    target: "es2017",
    plugins: [
      esbuildCopyPlugin.copy({
        resolveFrom: __dirname,
        assets: {
          from: ["./assets/**/*"],
          to: ["./dist"],
        },
        globbyOptions: {
          dot: true,
        },
      }),
      esbuildCopyPlugin.copy({
        resolveFrom: __dirname,
        assets: {
          from: ["./generatedAssets/**/*"],
          to: ["./dist"],
        },
      }),
    ],
  })
  .then(() => {
    const utilFilesAndDirectories = fs.existsSync(__dirname + "/utils")
      ? fs.readdirSync(__dirname + "/utils")
      : [];
    const utilFiles = [];
    utilFilesAndDirectories.forEach((entry) => {
      if (fs.statSync(__dirname + "/utils/" + entry).isFile())
        utilFiles.push(entry);
    });

    // Transpile utilities using esbuild
    esbuild
      .build({
        entryPoints: utilFiles.map((filename) => "utils/" + filename),
        bundle: false,
        outdir: "dist",
        platform: "node",
        target: "es2017",
      })
      .then(() => {
        const archiveName =
          "svr.js." +
          version.toLowerCase().replace(/[^0-9a-z]+/g, ".") +
          ".zip";
        const output = fs.createWriteStream(__dirname + "/out/" + archiveName);
        const archive = archiver("zip", {
          zlib: { level: 9 },
        });
        archive.pipe(output);

        // Add everything in the "dist" directory except for "svr.js" and "svr.compressed"
        const distFilesAndDirectories = fs.existsSync(__dirname + "/dist")
          ? fs.readdirSync(__dirname + "/dist")
          : [];
        distFilesAndDirectories.forEach((entry) => {
          if (entry == "svr.js" || entry == "svr.compressed") return;
          const stats = fs.statSync(__dirname + "/dist/" + entry);
          if (stats.isDirectory()) {
            archive.directory(__dirname + "/dist/" + entry, entry);
          } else if (stats.isFile()) {
            archive.file(__dirname + "/dist/" + entry, { name: entry });
          }
        });

        // Create a stream for the "svr.compressed" file
        const compressedSVRJSFileStream = fs
          .createReadStream(__dirname + "/dist/svr.js")
          .pipe(
            zlib.createGzip({
              level: 9,
            }),
          );
        archive.append(compressedSVRJSFileStream, { name: "svr.compressed" });
        archive.append(
          'const zlib = require("zlib");\nconst fs = require("fs");\nconst tar = require("tar");\nconsole.log("Deleting SVR.JS stub...");\nfs.unlinkSync("svr.js");\nconsole.log("Decompressing SVR.JS...");\nconst script = zlib.gunzipSync(fs.readFileSync("svr.compressed"));\nfs.unlinkSync("svr.compressed");\nfs.writeFileSync("svr.js",script);\nconsole.log("Restart SVR.JS to get server interface.");',
          { name: "svr.js" },
        );
        archive.finalize();
      })
      .catch((err) => {
        throw err;
      });
  })
  .catch((err) => {
    throw err;
  });