import * as program from "commander";
import * as fs from "fs";
import * as path from "path";

import { ApiService } from "jslib-common/abstractions/api.service";
import { CipherService } from "jslib-common/abstractions/cipher.service";
import { CryptoService } from "jslib-common/abstractions/crypto.service";
import { FolderService } from "jslib-common/abstractions/folder.service";
import { StateService } from "jslib-common/abstractions/state.service";

import { Cipher } from "jslib-common/models/export/cipher";
import { Collection } from "jslib-common/models/export/collection";
import { Folder } from "jslib-common/models/export/folder";

import { CollectionRequest } from "jslib-common/models/request/collectionRequest";
import { SelectionReadOnlyRequest } from "jslib-common/models/request/selectionReadOnlyRequest";

import { Response } from "jslib-node/cli/models/response";

import { CipherResponse } from "../models/response/cipherResponse";
import { FolderResponse } from "../models/response/folderResponse";
import { OrganizationCollectionResponse } from "../models/response/organizationCollectionResponse";

import { OrganizationCollectionRequest } from "../models/request/organizationCollectionRequest";

import { CliUtils } from "../utils";

import { Utils } from "jslib-common/misc/utils";

export class CreateCommand {
  constructor(
    private cipherService: CipherService,
    private folderService: FolderService,
    private stateService: StateService,
    private cryptoService: CryptoService,
    private apiService: ApiService
  ) {}

  async run(object: string, requestJson: string, cmd: program.Command): Promise<Response> {
    let req: any = null;
    if (object !== "attachment") {
      if (requestJson == null || requestJson === "") {
        requestJson = await CliUtils.readStdin();
      }

      if (requestJson == null || requestJson === "") {
        return Response.badRequest("`requestJson` was not provided.");
      }

      try {
        const reqJson = Buffer.from(requestJson, "base64").toString();
        req = JSON.parse(reqJson);
      } catch (e) {
        return Response.badRequest("Error parsing the encoded request data.");
      }
    }

    switch (object.toLowerCase()) {
      case "item":
        return await this.createCipher(req);
      case "attachment":
        return await this.createAttachment(cmd);
      case "folder":
        return await this.createFolder(req);
      case "org-collection":
        return await this.createOrganizationCollection(req, cmd);
      default:
        return Response.badRequest("Unknown object.");
    }
  }

  private async createCipher(req: Cipher) {
    const cipher = await this.cipherService.encrypt(Cipher.toView(req));
    try {
      await this.cipherService.saveWithServer(cipher);
      const newCipher = await this.cipherService.get(cipher.id);
      const decCipher = await newCipher.decrypt();
      const res = new CipherResponse(decCipher);
      return Response.success(res);
    } catch (e) {
      return Response.error(e);
    }
  }

  private async createAttachment(options: program.OptionValues) {
    if (options.itemid == null || options.itemid === "") {
      return Response.badRequest("--itemid <itemid> required.");
    }
    if (options.file == null || options.file === "") {
      return Response.badRequest("--file <file> required.");
    }
    const filePath = path.resolve(options.file);
    if (!fs.existsSync(options.file)) {
      return Response.badRequest("Cannot find file at " + filePath);
    }

    const itemId = options.itemid.toLowerCase();
    const cipher = await this.cipherService.get(itemId);
    if (cipher == null) {
      return Response.notFound();
    }

    if (cipher.organizationId == null && !(await this.stateService.getCanAccessPremium())) {
      return Response.error("Premium status is required to use this feature.");
    }

    const encKey = await this.cryptoService.getEncKey();
    if (encKey == null) {
      return Response.error(
        "You must update your encryption key before you can use this feature. " +
          "See https://help.bitwarden.com/article/update-encryption-key/"
      );
    }

    try {
      const fileBuf = fs.readFileSync(filePath);
      await this.cipherService.saveAttachmentRawWithServer(
        cipher,
        path.basename(filePath),
        new Uint8Array(fileBuf).buffer
      );
      const updatedCipher = await this.cipherService.get(cipher.id);
      const decCipher = await updatedCipher.decrypt();
      const res = new CipherResponse(decCipher);
      return Response.success(res);
    } catch (e) {
      return Response.error(e);
    }
  }

  private async createFolder(req: Folder) {
    const folder = await this.folderService.encrypt(Folder.toView(req));
    try {
      await this.folderService.saveWithServer(folder);
      const newFolder = await this.folderService.get(folder.id);
      const decFolder = await newFolder.decrypt();
      const res = new FolderResponse(decFolder);
      return Response.success(res);
    } catch (e) {
      return Response.error(e);
    }
  }

  private async createOrganizationCollection(
    req: OrganizationCollectionRequest,
    options: program.OptionValues
  ) {
    if (options.organizationid == null || options.organizationid === "") {
      return Response.badRequest("--organizationid <organizationid> required.");
    }
    if (!Utils.isGuid(options.organizationid)) {
      return Response.error("`" + options.organizationid + "` is not a GUID.");
    }
    if (options.organizationid !== req.organizationId) {
      return Response.error("--organizationid <organizationid> does not match request object.");
    }
    try {
      const orgKey = await this.cryptoService.getOrgKey(req.organizationId);
      if (orgKey == null) {
        throw new Error("No encryption key for this organization.");
      }

      const groups =
        req.groups == null
          ? null
          : req.groups.map((g) => new SelectionReadOnlyRequest(g.id, g.readOnly, g.hidePasswords));
      const request = new CollectionRequest();
      request.name = (await this.cryptoService.encrypt(req.name, orgKey)).encryptedString;
      request.externalId = req.externalId;
      request.groups = groups;
      const response = await this.apiService.postCollection(req.organizationId, request);
      const view = Collection.toView(req);
      view.id = response.id;
      const res = new OrganizationCollectionResponse(view, groups);
      return Response.success(res);
    } catch (e) {
      return Response.error(e);
    }
  }
}