import { AppID } from "@/common/appids";
import { Field } from "@/common/rest-api-client";
import { KintoneRestAPIClient } from "@kintone/rest-api-client";
import { chunk } from "lodash";

const UPDATE_PARAM = {
  method: "PUT",
  api: "/k/v1/record.json",
} as const;
const CREATE_PARAM = {
  method: "POST",
  api: "/k/v1/record.json",
} as const;

type Payload = {
  app: AppID;
  id?: string | number;
  query?: string;
  record: Field;
};

export type BulkRequestResponse = { id?: string; revision?: string };

export type RequestParam = {
  method: "POST" | "PUT";
  api: string;
  payload: Payload;
};

type Callback = (result: BulkRequestResponse) => Promise<void>;
export type BulkRequestCallback = Callback;

export class BulkRequest {
  private client: KintoneRestAPIClient;

  private requests: Array<RequestParam> = [];

  private callbacks: {
    [index: number]: Callback;
  } = {};

  constructor() {
    this.client = new KintoneRestAPIClient({
      baseUrl: location.origin,
    });
  }

  update(payload: Payload, callback?: Callback) {
    const request: RequestParam = {
      ...UPDATE_PARAM,
      payload,
    };
    this.requests.push(request);

    if (callback) {
      this.callbacks[this.requests.length - 1] = callback;
    }
  }

  create(payload: Payload, callback?: Callback) {
    const request: RequestParam = {
      ...CREATE_PARAM,
      payload,
    };
    this.requests.push(request);

    if (callback) {
      this.callbacks[this.requests.length - 1] = callback;
    }
  }

  isSaved() {
    return this.requests.length === 0;
  }

  async save() {
    this.debug();
    let results: BulkRequestResponse[] = [];
    for (const requests of chunk(this.requests, 20)) {
      const res = await this.client.bulkRequest({ requests });

      results = [...results, ...res.results];
    }
    await this.execCallback(results);
    this.clear();

    return results;
  }

  private async execCallback(results: BulkRequestResponse[]) {
    for (const [index, result] of results.entries()) {
      if (index in this.callbacks) {
        console.log("exec callback", this.requests.at(index));
        const callback = this.callbacks[index];
        await callback(result);
      }
    }
  }

  clear() {
    this.requests = [];
    this.callbacks = [];
  }

  debug() {
    console.log("BulkRequest debug", this, this.requests);
  }
}

const bulkRequest = new BulkRequest();
export default bulkRequest;