const fs = require("fs");
const path = require("path");
const request = require("request");
const checksum = require("checksum");
const Zip = require("adm-zip");
const child = require("child_process");
let counter = 0;

class Handler {
  constructor(client) {
    this.client = client;
    this.options = client.options;
    this.baseRequest = request.defaults({
      pool: { maxSockets: this.options.overrides.maxSockets || 2 },
      timeout: this.options.timeout || 10000,
    });
  }

  checkJava(java) {
    return new Promise((resolve) => {
      child.exec(`"${java}" -version`, (error, stdout, stderr) => {
        if (error) {
          resolve({
            run: false,
            message: error,
          });
        } else {
          this.client.emit(
            "debug",
            `[PiMi]: Using Java version ${stderr.match(/"(.*?)"/).pop()} ${
              stderr.includes("64-Bit") ? "64-bit" : "32-Bit"
            }`
          );
          resolve({
            run: true,
          });
        }
      });
    });
  }

  downloadAsync(url, directory, name, retry, type) {
    return new Promise((resolve) => {
      fs.mkdirSync(directory, { recursive: true });

      const _request = this.baseRequest(url);

      let receivedBytes = 0;
      let totalBytes = 0;

      _request.on("response", (data) => {
        if (data.statusCode === 404) {
          this.client.emit(
            "debug",
            `[PiMi]: Failed to download ${url} due to: File not found...`
          );
          return resolve(false);
        }

        totalBytes = parseInt(data.headers["content-length"]);
      });

      _request.on("error", async (error) => {
        this.client.emit(
          "debug",
          `[PiMi]: Failed to download asset to ${path.join(
            directory,
            name
          )} due to\n${error}.` + ` Retrying... ${retry}`
        );
        if (retry) await this.downloadAsync(url, directory, name, false, type);
        resolve();
      });

      _request.on("data", (data) => {
        receivedBytes += data.length;
        this.client.emit("download-status", {
          name: name,
          type: type,
          current: receivedBytes,
          total: totalBytes,
        });
      });

      const file = fs.createWriteStream(path.join(directory, name));
      _request.pipe(file);

      file.once("finish", () => {
        this.client.emit("download", name);
        resolve({
          failed: false,
          asset: null,
        });
      });

      file.on("error", async (e) => {
        this.client.emit(
          "debug",
          `[PiMi]: Failed to download asset to ${path.join(
            directory,
            name
          )} due to\n${e}.` + ` Retrying... ${retry}`
        );
        if (fs.existsSync(path.join(directory, name)))
          fs.unlinkSync(path.join(directory, name));
        if (retry) await this.downloadAsync(url, directory, name, false, type);
        resolve();
      });
    });
  }

  checkSum(hash, file) {
    return new Promise((resolve, reject) => {
      checksum.file(file, (err, sum) => {
        if (err) {
          this.client.emit(
            "debug",
            `[PiMi]: Failed to check file hash due to ${err}`
          );
          resolve(false);
        } else {
          resolve(hash === sum);
        }
      });
    });
  }

  getVersion() {
    return new Promise((resolve) => {
      const versionJsonPath =
        this.options.overrides.versionJson ||
        path.join(
          this.options.directory,
          `${this.options.version.number}.json`
        );
      if (fs.existsSync(versionJsonPath)) {
        this.version = JSON.parse(fs.readFileSync(versionJsonPath));
        return resolve(this.version);
      }

      const manifest = `${this.options.overrides.url.meta}/mc/game/version_manifest.json`;
      const cache = this.options.cache
        ? `${this.options.cache}/json`
        : `${this.options.root}/cache/json`;
      request.get(manifest, (error, response, body) => {
        if (error && error.code !== "ENOTFOUND") return resolve(error);
        if (!error) {
          if (!fs.existsSync(cache)) {
            fs.mkdirSync(cache, { recursive: true });
            this.client.emit("debug", "[PiMi]: Cache directory created.");
          }
          fs.writeFile(
            path.join(`${cache}/version_manifest.json`),
            body,
            (err) => {
              if (err) return resolve(err);
              this.client.emit("debug", "[PiMi]: Cached version_manifest.json");
            }
          );
        }

        let parsed;
        if (error && error.code === "ENOTFOUND") {
          parsed = JSON.parse(
            fs.readFileSync(`${cache}/version_manifest.json`)
          );
        } else {
          parsed = JSON.parse(body);
        }

        for (const desiredVersion in parsed.versions) {
          if (
            parsed.versions[desiredVersion].id === this.options.version.number
          ) {
            request.get(
              parsed.versions[desiredVersion].url,
              (error, response, body) => {
                if (error && error.code !== "ENOTFOUND") return resolve(error);
                if (!error) {
                  fs.writeFile(
                    path.join(`${cache}/${this.options.version.number}.json`),
                    body,
                    (err) => {
                      if (err) return resolve(err);
                      this.client.emit(
                        "debug",
                        `[PiMi]: Cached ${this.options.version.number}.json`
                      );
                    }
                  );
                }

                this.client.emit(
                  "debug",
                  "[PiMi]: Parsed version from version manifest"
                );
                if (error && error.code === "ENOTFOUND") {
                  this.version = JSON.parse(
                    fs.readFileSync(
                      `${cache}/${this.options.version.number}.json`
                    )
                  );
                } else {
                  this.version = JSON.parse(body);
                }
                return resolve(this.version);
              }
            );
          }
        }
      });
    });
  }

  async getJar() {
    await this.downloadAsync(
      this.version.downloads.client.url,
      this.options.directory,
      `${
        this.options.version.custom
          ? this.options.version.custom
          : this.options.version.number
      }.jar`,
      true,
      "version-jar"
    );

    fs.writeFileSync(
      path.join(this.options.directory, `${this.options.version.number}.json`),
      JSON.stringify(this.version, null, 4)
    );

    return this.client.emit(
      "debug",
      "[PiMi]: Downloaded version jar and wrote version json"
    );
  }

  async getAssets() {
    const assetDirectory = path.resolve(
      this.options.overrides.assetRoot || path.join(this.options.root, "assets")
    );
    const assetId = this.options.version.custom || this.options.version.number;
    if (
      !fs.existsSync(path.join(assetDirectory, "indexes", `${assetId}.json`))
    ) {
      await this.downloadAsync(
        this.version.assetIndex.url,
        path.join(assetDirectory, "indexes"),
        `${assetId}.json`,
        true,
        "asset-json"
      );
    }

    const index = JSON.parse(
      fs.readFileSync(path.join(assetDirectory, "indexes", `${assetId}.json`), {
        encoding: "utf8",
      })
    );

    this.client.emit("progress", {
      type: "assets",
      task: 0,
      total: Object.keys(index.objects).length,
    });

    await Promise.all(
      Object.keys(index.objects).map(async (asset) => {
        const hash = index.objects[asset].hash;
        const subhash = hash.substring(0, 2);
        const subAsset = path.join(assetDirectory, "objects", subhash);

        if (
          !fs.existsSync(path.join(subAsset, hash)) ||
          !(await this.checkSum(hash, path.join(subAsset, hash)))
        ) {
          await this.downloadAsync(
            `${this.options.overrides.url.resource}/${subhash}/${hash}`,
            subAsset,
            hash,
            true,
            "assets"
          );
          counter++;
          this.client.emit("progress", {
            type: "assets",
            task: counter,
            total: Object.keys(index.objects).length,
          });
        }
      })
    );
    counter = 0;

    // Copy assets to legacy if it's an older Minecraft version.
    if (this.isLegacy()) {
      if (fs.existsSync(path.join(assetDirectory, "legacy"))) {
        this.client.emit(
          "debug",
          "[PiMi]: The 'legacy' directory is no longer used as Minecraft looks " +
            "for the resouces folder regardless of what is passed in the assetDirecotry launch option. I'd " +
            `recommend removing the directory (${path.join(
              assetDirectory,
              "legacy"
            )})`
        );
      }

      const legacyDirectory = path.join(this.options.root, "resources");
      this.client.emit(
        "debug",
        `[PiMi]: Copying assets over to ${legacyDirectory}`
      );

      this.client.emit("progress", {
        type: "assets-copy",
        task: 0,
        total: Object.keys(index.objects).length,
      });

      await Promise.all(
        Object.keys(index.objects).map(async (asset) => {
          const hash = index.objects[asset].hash;
          const subhash = hash.substring(0, 2);
          const subAsset = path.join(assetDirectory, "objects", subhash);

          const legacyAsset = asset.split("/");
          legacyAsset.pop();

          if (
            !fs.existsSync(path.join(legacyDirectory, legacyAsset.join("/")))
          ) {
            fs.mkdirSync(path.join(legacyDirectory, legacyAsset.join("/")), {
              recursive: true,
            });
          }

          if (!fs.existsSync(path.join(legacyDirectory, asset))) {
            fs.copyFileSync(
              path.join(subAsset, hash),
              path.join(legacyDirectory, asset)
            );
          }
          counter++;
          this.client.emit("progress", {
            type: "assets-copy",
            task: counter,
            total: Object.keys(index.objects).length,
          });
        })
      );
    }
    counter = 0;

    this.client.emit("debug", "[PiMi]: Downloaded assets");
  }

  parseRule(lib) {
    if (lib.rules) {
      if (lib.rules.length > 1) {
        if (
          lib.rules[0].action === "allow" &&
          lib.rules[1].action === "disallow" &&
          lib.rules[1].os.name === "osx"
        ) {
          return this.getOS() === "osx";
        } else {
          return true;
        }
      } else {
        if (lib.rules[0].action === "allow" && lib.rules[0].os)
          return lib.rules[0].os.name !== this.getOS();
      }
    } else {
      return false;
    }
  }

  async getNatives() {
    const nativeDirectory = path.resolve(
      this.options.overrides.natives ||
        path.join(this.options.root, "natives", this.version.id)
    );

    if (parseInt(this.version.id.split(".")[1]) >= 19)
      return this.options.overrides.cwd || this.options.root;

    if (
      !fs.existsSync(nativeDirectory) ||
      !fs.readdirSync(nativeDirectory).length
    ) {
      fs.mkdirSync(nativeDirectory, { recursive: true });

      const natives = async () => {
        const natives = [];
        await Promise.all(
          this.version.libraries.map(async (lib) => {
            if (!lib.downloads || !lib.downloads.classifiers) return;
            if (this.parseRule(lib)) return;

            const native =
              this.getOS() === "osx"
                ? lib.downloads.classifiers["natives-osx"] ||
                  lib.downloads.classifiers["natives-macos"]
                : lib.downloads.classifiers[`natives-${this.getOS()}`];

            natives.push(native);
          })
        );
        return natives;
      };
      const stat = await natives();

      this.client.emit("progress", {
        type: "natives",
        task: 0,
        total: stat.length,
      });

      await Promise.all(
        stat.map(async (native) => {
          if (!native) return;
          const name = native.path.split("/").pop();
          await this.downloadAsync(
            native.url,
            nativeDirectory,
            name,
            true,
            "natives"
          );
          if (
            !(await this.checkSum(
              native.sha1,
              path.join(nativeDirectory, name)
            ))
          ) {
            await this.downloadAsync(
              native.url,
              nativeDirectory,
              name,
              true,
              "natives"
            );
          }
          try {
            new Zip(path.join(nativeDirectory, name)).extractAllTo(
              nativeDirectory,
              true
            );
          } catch (e) {
            // Only doing a console.warn since a stupid error happens. You can basically ignore this.
            // if it says Invalid file name, just means two files were downloaded and both were deleted.
            // All is well.
            console.warn(e);
          }
          fs.unlinkSync(path.join(nativeDirectory, name));
          counter++;
          this.client.emit("progress", {
            type: "natives",
            task: counter,
            total: stat.length,
          });
        })
      );
      this.client.emit("debug", "[PiMi]: Downloaded and extracted natives");
    }

    counter = 0;
    this.client.emit("debug", `[PiMi]: Set native path to ${nativeDirectory}`);

    return nativeDirectory;
  }

  fwAddArgs() {
    const forgeWrapperAgrs = [
      `-Dforgewrapper.librariesDir=${path.resolve(
        this.options.overrides.libraryRoot ||
          path.join(this.options.root, "libraries")
      )}`,
      `-Dforgewrapper.installer=${this.options.forge}`,
      `-Dforgewrapper.minecraft=${this.options.mcPath}`,
    ];
    this.options.customArgs
      ? (this.options.customArgs =
          this.options.customArgs.concat(forgeWrapperAgrs))
      : (this.options.customArgs = forgeWrapperAgrs);
  }

  isModernForge(json) {
    return (
      json.inheritsFrom &&
      json.inheritsFrom.split(".")[1] >= 12 &&
      !(
        json.inheritsFrom === "1.12.2" &&
        json.id.split(".")[json.id.split(".").length - 1] === "2847"
      )
    );
  }

  async getForgedWrapped() {
    let json = null;
    let installerJson = null;
    const versionPath = path.join(
      this.options.root,
      "forge",
      `${this.version.id}`,
      "version.json"
    );
    // Since we're building a proper "custom" JSON that will work nativly with PiMi, the version JSON will not
    // be re-generated on the next run.
    if (fs.existsSync(versionPath)) {
      try {
        json = JSON.parse(fs.readFileSync(versionPath));
        if (
          !json.forgeWrapperVersion ||
          !(json.forgeWrapperVersion === this.options.overrides.fw.version)
        ) {
          this.client.emit(
            "debug",
            "[PiMi]: Old ForgeWrapper has generated this version JSON, re-generating"
          );
        } else {
          // If forge is modern, add ForgeWrappers launch arguments and set forge to null so PiMi treats it as a custom json.
          if (this.isModernForge(json)) {
            this.fwAddArgs();
            this.options.forge = null;
          }
          return json;
        }
      } catch (e) {
        console.warn(e);
        this.client.emit(
          "debug",
          "[PiMi]: Failed to parse Forge version JSON, re-generating"
        );
      }
    }

    this.client.emit(
      "debug",
      "[PiMi]: Generating a proper version json, this might take a bit"
    );
    const zipFile = new Zip(this.options.forge);
    json = zipFile.readAsText("version.json");
    if (zipFile.getEntry("install_profile.json"))
      installerJson = zipFile.readAsText("install_profile.json");

    try {
      json = JSON.parse(json);
      if (installerJson) installerJson = JSON.parse(installerJson);
    } catch (e) {
      this.client.emit(
        "debug",
        "[PiMi]: Failed to load json files for ForgeWrapper, using Vanilla instead"
      );
      return null;
    }
    // Adding the installer libraries as mavenFiles so PiMi downloads them but doesn't add them to the class paths.
    if (installerJson) {
      json.mavenFiles
        ? (json.mavenFiles = json.mavenFiles.concat(installerJson.libraries))
        : (json.mavenFiles = installerJson.libraries);
    }

    // Holder for the specifc jar ending which depends on the specifc forge version.
    let jarEnding = "universal";
    // We need to handle modern forge differently than legacy.
    if (this.isModernForge(json)) {
      // If forge is modern and above 1.12.2, we add ForgeWrapper to the libraries so PiMi includes it in the classpaths.
      if (json.inheritsFrom !== "1.12.2") {
        this.fwAddArgs();
        const fwName = `ForgeWrapper-${this.options.overrides.fw.version}.jar`;
        const fwPathArr = [
          "io",
          "github",
          "zekerzhayard",
          "ForgeWrapper",
          this.options.overrides.fw.version,
        ];
        json.libraries.push({
          name: fwPathArr.join(":"),
          downloads: {
            artifact: {
              path: [...fwPathArr, fwName].join("/"),
              url: `${this.options.overrides.fw.baseUrl}${this.options.overrides.fw.version}/${fwName}`,
              sha1: this.options.overrides.fw.sh1,
              size: this.options.overrides.fw.size,
            },
          },
        });
        json.mainClass = "io.github.zekerzhayard.forgewrapper.installer.Main";
        jarEnding = "launcher";

        // Providing a download URL to the universal jar mavenFile so it can be downloaded properly.
        for (const library of json.mavenFiles) {
          const lib = library.name.split(":");
          if (lib[0] === "net.minecraftforge" && lib[1].includes("forge")) {
            library.downloads.artifact.url =
              "https://files.minecraftforge.net/maven/" +
              library.downloads.artifact.path;
            break;
          }
        }
      } else {
        // Remove the forge dependent since we're going to overwrite the first entry anyways.
        for (const library in json.mavenFiles) {
          const lib = json.mavenFiles[library].name.split(":");
          if (lib[0] === "net.minecraftforge" && lib[1].includes("forge")) {
            delete json.mavenFiles[library];
            break;
          }
        }
      }
    } else {
      // Modifying legacy library format to play nice with PiMi's downloadToDirectory function.
      await Promise.all(
        json.libraries.map(async (library) => {
          const lib = library.name.split(":");
          if (lib[0] === "net.minecraftforge" && lib[1].includes("forge"))
            return;

          let url = this.options.overrides.url.mavenForge;
          const name = `${lib[1]}-${lib[2]}.jar`;

          if (!library.url) {
            if (library.serverreq || library.clientreq) {
              url = this.options.overrides.url.defaultRepoForge;
            } else {
              return;
            }
          }
          library.url = url;
          const downloadLink = `${url}${lib[0].replace(/\./g, "/")}/${lib[1]}/${
            lib[2]
          }/${name}`;
          // Checking if the file still exists on Forge's server, if not, replace it with the fallback.
          // Not checking for sucess, only if it 404s.
          this.baseRequest(downloadLink, (error, response, body) => {
            if (error) {
              this.client.emit(
                "debug",
                `[PiMi]: Failed checking request for ${downloadLink}`
              );
            } else {
              if (response.statusCode === 404)
                library.url = this.options.overrides.url.fallbackMaven;
            }
          });
        })
      );
    }
    // If a downloads property exists, we modify the inital forge entry to include ${jarEnding} so ForgeWrapper can work properly.
    // If it doesn't, we simply remove it since we're already providing the universal jar.
    if (json.libraries[0].downloads) {
      if (json.libraries[0].name.includes("minecraftforge")) {
        json.libraries[0].name = json.libraries[0].name + `:${jarEnding}`;
        json.libraries[0].downloads.artifact.path =
          json.libraries[0].downloads.artifact.path.replace(
            ".jar",
            `-${jarEnding}.jar`
          );
        json.libraries[0].downloads.artifact.url =
          "https://files.minecraftforge.net/maven/" +
          json.libraries[0].downloads.artifact.path;
      }
    } else {
      delete json.libraries[0];
    }

    // Removing duplicates and null types
    json.libraries = this.cleanUp(json.libraries);
    if (json.mavenFiles) json.mavenFiles = this.cleanUp(json.mavenFiles);

    json.forgeWrapperVersion = this.options.overrides.fw.version;

    // Saving file for next run!
    if (
      !fs.existsSync(path.join(this.options.root, "forge", this.version.id))
    ) {
      fs.mkdirSync(path.join(this.options.root, "forge", this.version.id), {
        recursive: true,
      });
    }
    fs.writeFileSync(versionPath, JSON.stringify(json, null, 4));

    // Make PiMi treat modern forge as a custom version json rather then legacy forge.
    if (this.isModernForge(json)) this.options.forge = null;

    return json;
  }

  runInstaller(path) {
    return new Promise((resolve) => {
      const installer = child.exec(path);
      installer.on("close", (code) => resolve(code));
    });
  }

  async downloadToDirectory (directory, libraries, eventName) {
    const libs = []

    await Promise.all(libraries.map(async library => {
      if (!library) return
      if (this.parseRule(library)) return
      const lib = library.name.split(':')

      let jarPath
      let name
      if (library.downloads && library.downloads.artifact && library.downloads.artifact.path) {
        name = library.downloads.artifact.path.split('/')[library.downloads.artifact.path.split('/').length - 1]
        jarPath = path.join(directory, this.popString(library.downloads.artifact.path))
      } else {
        name = `${lib[1]}-${lib[2]}${lib[3] ? '-' + lib[3] : ''}.jar`
        jarPath = path.join(directory, `${lib[0].replace(/\./g, '/')}/${lib[1]}/${lib[2]}`)
      }

      const downloadLibrary = async library => {
        if (library.url) {
          const url = `${library.url}${lib[0].replace(/\./g, '/')}/${lib[1]}/${lib[2]}/${name}`
          await this.downloadAsync(url, jarPath, name, true, eventName)
        } else if (library.downloads && library.downloads.artifact) {
          await this.downloadAsync(library.downloads.artifact.url, jarPath, name, true, eventName)
        }
      }

      if (!fs.existsSync(path.join(jarPath, name))) downloadLibrary(library)
      else if (library.downloads && library.downloads.artifact) {
        if (!this.checkSum(library.downloads.artifact.sha1, path.join(jarPath, name))) downloadLibrary(library)
      }

      counter++
      this.client.emit('progress', {
        type: eventName,
        task: counter,
        total: libraries.length
      })
      libs.push(`${jarPath}${path.sep}${name}`)
    }))
    counter = 0

    return libs
  }

  async getClasses(classJson) {
    let libs = [];

    const libraryDirectory = path.resolve(
      this.options.overrides.libraryRoot ||
        path.join(this.options.root, "libraries")
    );

    if (classJson) {
      if (classJson.mavenFiles) {
        await this.downloadToDirectory(
          libraryDirectory,
          classJson.mavenFiles,
          "classes-maven-custom"
        );
      }
      libs = await this.downloadToDirectory(
        libraryDirectory,
        classJson.libraries,
        "classes-custom"
      );
    }

    const parsed = this.version.libraries.map((lib) => {
      if (lib.downloads && lib.downloads.artifact && !this.parseRule(lib))
        return lib;
    });

    libs = libs.concat(
      await this.downloadToDirectory(libraryDirectory, parsed, "classes")
    );
    counter = 0;

    // Temp Quilt support
    if (classJson) libs.sort();

    this.client.emit("debug", "[PiMi]: Collected class paths");
    return libs;
  }

  popString(path) {
    const tempArray = path.split("/");
    tempArray.pop();
    return tempArray.join("/");
  }

  cleanUp(array) {
    const newArray = [];
    for (const classPath in array) {
      if (newArray.includes(array[classPath]) || array[classPath] === null)
        continue;
      newArray.push(array[classPath]);
    }
    return newArray;
  }

  formatQuickPlay() {
    const types = {
      singleplayer: "--quickPlaySingleplayer",
      multiplayer: "--quickPlayMultiplayer",
      realms: "--quickPlayRealms",
      legacy: null,
    };
    const { type, identifier, path } = this.options.quickPlay;
    const keys = Object.keys(types);
    if (!keys.includes(type)) {
      this.client.emit(
        "debug",
        `[PiMi]: quickPlay type is not valid. Valid types are: ${keys.join(
          ", "
        )}`
      );
      return null;
    }
    const returnArgs =
      type === "legacy"
        ? [
            "--server",
            identifier.split(":")[0],
            "--port",
            identifier.split(":")[1] || "25565",
          ]
        : [types[type], identifier];
    if (path) returnArgs.push("--quickPlayPath", path);
    return returnArgs;
  }

  async getLaunchOptions(modification) {
    const type = modification || this.version;

    let args = type.minecraftArguments
      ? type.minecraftArguments.split(" ")
      : type.arguments.game;
    const assetRoot = path.resolve(
      this.options.overrides.assetRoot || path.join(this.options.root, "assets")
    );
    const assetPath = this.isLegacy()
      ? path.join(this.options.root, "resources")
      : path.join(assetRoot);

    const minArgs = this.options.overrides.minArgs || this.isLegacy() ? 5 : 11;
    if (args.length < minArgs)
      args = args.concat(
        this.version.minecraftArguments
          ? this.version.minecraftArguments.split(" ")
          : this.version.arguments.game
      );
    if (this.options.customLaunchArgs)
      args = args.concat(this.options.customLaunchArgs);

    this.options.authorization = await Promise.resolve(
      this.options.authorization
    );
    this.options.authorization.meta = this.options.authorization.meta
      ? this.options.authorization.meta
      : { type: "mojang" };
    const fields = {
      "${auth_access_token}": this.options.authorization.access_token,
      "${auth_session}": this.options.authorization.access_token,
      "${auth_player_name}": this.options.authorization.name,
      "${auth_uuid}": this.options.authorization.uuid,
      "${auth_xuid}":
        this.options.authorization.meta.xuid ||
        this.options.authorization.access_token,
      "${user_properties}": this.options.authorization.user_properties,
      "${user_type}": this.options.authorization.meta.type,
      "${version_name}": this.options.version.number,
      "${assets_index_name}":
        this.options.overrides.assetIndex ||
        this.options.version.custom ||
        this.options.version.number,
      "${game_directory}":
        this.options.overrides.gameDirectory || this.options.root,
      "${assets_root}": assetPath,
      "${game_assets}": assetPath,
      "${version_type}": this.options.version.type,
      "${clientid}":
        this.options.authorization.meta.clientId ||
        this.options.authorization.client_token ||
        this.options.authorization.access_token,
      "${resolution_width}": this.options.window
        ? this.options.window.width
        : 856,
      "${resolution_height}": this.options.window
        ? this.options.window.height
        : 482,
    };

    if (
      this.options.authorization.meta.demo &&
      (this.options.features
        ? !this.options.features.includes("is_demo_user")
        : true)
    ) {
      args.push("--demo");
    }

    const replaceArg = (obj, index) => {
      if (Array.isArray(obj.value)) {
        for (const arg of obj.value) {
          args.push(arg);
        }
      } else {
        args.push(obj.value);
      }
      delete args[index];
    };

    for (let index = 0; index < args.length; index++) {
      if (typeof args[index] === "object") {
        if (args[index].rules) {
          if (!this.options.features) continue;
          const featureFlags = [];
          for (const rule of args[index].rules) {
            featureFlags.push(...Object.keys(rule.features));
          }
          let hasAllRules = true;
          for (const feature of this.options.features) {
            if (!featureFlags.includes(feature)) {
              hasAllRules = false;
            }
          }
          if (hasAllRules) replaceArg(args[index], index);
        } else {
          replaceArg(args[index], index);
        }
      } else {
        if (Object.keys(fields).includes(args[index])) {
          args[index] = fields[args[index]];
        }
      }
    }
    if (this.options.window) {
      // eslint-disable-next-line no-unused-expressions
      this.options.window.fullscreen
        ? args.push("--fullscreen")
        : () => {
            if (
              this.options.features
                ? !this.options.features.includes("has_custom_resolution")
                : true
            ) {
              args.push(
                "--width",
                this.options.window.width,
                "--height",
                this.options.window.height
              );
            }
          };
    }
    if (this.options.server)
      this.client.emit(
        "debug",
        "[PiMi]: server and port are deprecated launch flags. Use the quickPlay field."
      );
    if (this.options.quickPlay) args = args.concat(this.formatQuickPlay());
    if (this.options.proxy) {
      args.push(
        "--proxyHost",
        this.options.proxy.host,
        "--proxyPort",
        this.options.proxy.port || "8080",
        "--proxyUser",
        this.options.proxy.username,
        "--proxyPass",
        this.options.proxy.password
      );
    }
    args = args.filter(
      (value) => typeof value === "string" || typeof value === "number"
    );
    this.client.emit("debug", "[PiMi]: Set launch options");
    return args;
  }

  async getJVM() {
    const opts = {
      windows:
        "-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump",
      osx: "-XstartOnFirstThread",
      linux: "-Xss1M",
    };
    return opts[this.getOS()];
  }

  isLegacy() {
    return (
      this.version.assets === "legacy" || this.version.assets === "pre-1.6"
    );
  }

  getOS() {
    if (this.options.os) {
      return this.options.os;
    } else {
      switch (process.platform) {
        case "win32":
          return "windows";
        case "darwin":
          return "osx";
        default:
          return "linux";
      }
    }
  }

  // To prevent launchers from breaking when they update. Will be reworked with rewrite.
  getMemory() {
    if (!this.options.memory) {
      this.client.emit("debug", "[PiMi]: Memory not set! Setting 1GB as MAX!");
      this.options.memory = {
        min: 512,
        max: 1023,
      };
    }
    if (!isNaN(this.options.memory.max) && !isNaN(this.options.memory.min)) {
      if (this.options.memory.max < this.options.memory.min) {
        this.client.emit(
          "debug",
          "[PiMi]: MIN memory is higher then MAX! Resetting!"
        );
        this.options.memory.max = 1023;
        this.options.memory.min = 512;
      }
      return [`${this.options.memory.max}M`, `${this.options.memory.min}M`];
    } else {
      return [`${this.options.memory.max}`, `${this.options.memory.min}`];
    }
  }

  async extractPackage(options = this.options) {
    if (options.clientPackage.startsWith("http")) {
      await this.downloadAsync(
        options.clientPackage,
        options.root,
        "clientPackage.zip",
        true,
        "client-package"
      );
      options.clientPackage = path.join(options.root, "clientPackage.zip");
    }
    new Zip(options.clientPackage).extractAllTo(options.root, true);
    if (options.removePackage) fs.unlinkSync(options.clientPackage);

    return this.client.emit("package-extract", true);
  }
}

module.exports = Handler;