import {
  Body,
  Controller,
  Delete,
  Get,
  Path,
  Post,
  Put,
  Request,
  Route,
  Security,
  SuccessResponse,
  Tags,
} from "tsoa";
import * as Minio from "minio";

import HttpError from "../interfaces/http-error";
import HttpStatusCode from "../interfaces/http-status";
import { listFolder, listItem, pathExist, replaceIllegalChars } from "../utils/minio";
import { EhrFile, EhrFolder } from "../interfaces/ehr-fs";
import minioClient from "../storage";
import esClient from "../elasticsearch";

@Route("/cabinet/{cabinetName}/drawer/{drawerName}/folder")
export class FolderController extends Controller {
  @Get("/")
  @Tags("Folder")
  @SuccessResponse(HttpStatusCode.OK)
  public async listFolder(
    @Path() cabinetName: string,
    @Path() drawerName: string,
  ): Promise<EhrFolder[]> {
    const fullpath = [cabinetName, drawerName, ""].join("/");

    if (!(await pathExist(fullpath))) {
      throw new HttpError(HttpStatusCode.NOT_FOUND, "Provided path does not exist.");
    }

    return listFolder(fullpath);
  }

  @Post("/")
  @Tags("Folder")
  @Security("bearerAuth")
  @SuccessResponse(HttpStatusCode.CREATED)
  public async createFolder(
    @Request() request: { user: { preferred_username: string } },
    @Body() body: { name: string },
    @Path() cabinetName: string,
    @Path() drawerName: string,
  ) {
    if (!(await pathExist(`${cabinetName}/${drawerName}/`))) {
      throw new HttpError(HttpStatusCode.PRECONDITION_FAILED, "Cabinet or drawer cannot be found.");
    }

    const uploaded = await minioClient
      .putObject(
        "ehr",
        `${cabinetName}/${drawerName}/${replaceIllegalChars(body.name)}/.keep`,
        "",
        0,
        {
          createdAt: new Date().toISOString(),
          createdBy: request.user.preferred_username,
        },
      )
      .catch((e) => console.error(e));

    if (!uploaded) {
      throw new Error("Object storage error occured.");
    }

    return this.setStatus(HttpStatusCode.CREATED);
  }

  @Put("/{folderName}")
  @Tags("Folder")
  @Security("bearerAuth")
  @SuccessResponse(HttpStatusCode.NO_CONTENT)
  public async editFolder(
    @Body() body: { name: string },
    @Path() cabinetName: string,
    @Path() drawerName: string,
    @Path() folderName: string,
  ) {
    const fullpath = `${cabinetName}/${drawerName}/${folderName}`;

    const list = await listItem(fullpath, true);

    const cond = new Minio.CopyConditions();

    await Promise.all(
      list.map(async (current) => {
        if (!current.name) return;

        const destination = `${cabinetName}/${drawerName}/${replaceIllegalChars(
          body.name,
        )}/${current.name.slice(fullpath.length)}`;
        const source = `/ehr/${current.name}`;

        return await minioClient
          .copyObject("ehr", destination, source, cond)
          .then(async () => {
            if (!current.name) return;

            await minioClient.removeObject("ehr", current.name);

            if (current.name.includes(".keep")) return;

            const search = await esClient.search<EhrFile & { attachment: Record<string, string> }>({
              index: process.env.ELASTICSEARCH_INDEX ?? "ehr-index",
              query: {
                match: {
                  pathname: current.name,
                },
              },
            });

            if (search && search.hits.hits.length === 0) {
              throw new Error("Data cannot be found in database.");
            }

            const data = search.hits.hits[0];

            await esClient.update({
              index: process.env.ELASTICSEARCH_INDEX ?? "ehr-index",
              id: data._id,
              doc: { pathname: destination },
            });
          })
          .catch((e) => {
            console.error(e);
            throw new Error("Failed to move.");
          });
      }),
    );

    return this.setStatus(HttpStatusCode.NO_CONTENT);
  }

  @Delete("/{folderName}")
  @Tags("Folder")
  @Security("bearerAuth")
  @SuccessResponse(HttpStatusCode.NO_CONTENT)
  public async deleteFolder(
    @Path() cabinetName: string,
    @Path() drawerName: string,
    @Path() folderName: string,
  ) {
    return new Promise((resolve, reject) => {
      const objects: string[] = [];
      const stream = minioClient.listObjectsV2(
        "ehr",
        `${cabinetName}/${drawerName}/${folderName}`,
        true,
      );

      stream.on("data", (v) => {
        if (!(v && v.name)) return;

        objects.push(v.name);
      });

      stream.on("close", () => minioClient.removeObjects("ehr", objects));
      stream.on("error", () => reject(new Error("Object storage error occured.")));

      resolve(this.setStatus(HttpStatusCode.NO_CONTENT));
    });
  }
}