/* eslint-disable @typescript-eslint/no-explicit-any */
import { b64EncodeUnicode } from '@warkypublic/artemis-kit/base64';
const TOKEN_KEY = 'gridler_golang_restapi_v2_token';

export type APIOptionsType = {
  autocreate?: boolean;
  autoref?: boolean;
  baseurl?: string;
  getAPIProvider?: () => { provider: string; providerKey: string };
  getAuthToken?: () => string;
  operations?: Array<FetchAPIOperation>;
  postfix?: string;
  prefix?: string;
  requestTimeoutSec?: number;
};

export interface APIResponse {
  errmsg: string;
  payload?: any;
  retval: number;
}
export interface FetchAPIOperation {
  name?: string;
  op?: string;
  type: GoAPIHeaderTypes; //x-fieldfilter
  value: string;
}
/**
 * @description Types for the Go Rest API headers
 * @typedef {String} GoAPIEnum
 */
export type GoAPIEnum =
  | 'advsql'
  | 'api-key'
  | 'api-range-from'
  | 'api-range-size'
  | 'api-range-total'
  | 'api-src'
  | 'api'
  | 'association_autocreate'
  | 'association_autoupdate'
  | 'association-update'
  | 'cql-sel'
  | 'cursor-backward' // For x cursor-backward header
  | 'cursor-forward' // For x cursor-forward header
  | 'custom-sql-join'
  | 'custom-sql-or'
  | 'custom-sql-w'
  | 'detailapi'
  | 'distinct'
  | 'expand'
  | 'fetch-rownumber'
  | 'fieldfilter'
  | 'fieldfilter'
  | 'files' //For x files header
  | 'func'
  | 'limit'
  | 'no-return'
  | 'not-select-fields'
  | 'offset'
  | 'parm'
  | 'pkrow'
  | 'preload'
  | 'searchand'
  | 'searchfilter'
  | 'searchfilter'
  | 'searchop'
  | 'searchop'
  | 'searchor'
  | 'select-fields'
  | 'simpleapi'
  | 'skipcache'
  | 'skipcount'
  | 'sort';

export type GoAPIHeaderKeys = `x-${GoAPIEnum}`;

export type GoAPIHeaderTypes = GoAPIEnum & string;

export interface GoAPIOperation {
  name?: string;
  op?: string;
  type: GoAPIHeaderTypes; //x-fieldfilter
  value: string;
}
export interface MetaData {
  limit?: number;
  offset?: number;
  total?: number;
}

/**
 * Builds an array of objects by encoding specific values and setting headers.
 *
 * @param {Array<FetchAPIOperation>} ops - The array of FetchAPIOperation objects to be built.
 * @param {Headers} [headers] - Optional headers to be set.
 * @return {Array<FetchAPIOperation>} - The built array of FetchAPIOperation objects.
 */
const buildGoAPIOperation = (
  ops: Array<FetchAPIOperation>,
  headers?: Headers
): Array<FetchAPIOperation> => {
  const newops = [...ops.filter((i) => i !== undefined && i.type !== undefined)];

  for (let i = 0; i < newops.length; i++) {
    if (!newops[i].name || newops[i].name === '') {
      newops[i].name = '';
    }
    if (newops[i].type === 'files' && !newops[i].value.startsWith('__')) {
      newops[i].value = `__${b64EncodeUnicode(newops[i].value)}__`;
    }
    if (newops[i].type === 'advsql' && !newops[i].value.startsWith('__')) {
      newops[i].value = `__${b64EncodeUnicode(newops[i].value)}__`;
    }

    if (newops[i].type === 'custom-sql-or' && !newops[i].value.startsWith('__')) {
      newops[i].value = `__${b64EncodeUnicode(newops[i].value)}__`;
    }

    if (newops[i].type === 'custom-sql-join' && !newops[i].value.startsWith('__')) {
      newops[i].value = `__${b64EncodeUnicode(newops[i].value)}__`;
    }
    if (newops[i].type === 'not-select-fields' && !newops[i].value.startsWith('__')) {
      newops[i].value = `__${b64EncodeUnicode(newops[i].value)}__`;
    }
    if (newops[i].type === 'custom-sql-w' && !newops[i].value.startsWith('__')) {
      newops[i].value = `__${b64EncodeUnicode(newops[i].value)}__`;
    }
    if (newops[i].type === 'select-fields' && !newops[i].value.startsWith('__')) {
      newops[i].value = `__${b64EncodeUnicode(newops[i].value)}__`;
    }
    if (newops[i].type === 'cql-sel' && !newops[i].value.startsWith('__')) {
      newops[i].value = `__${b64EncodeUnicode(newops[i].value)}__`;
    }

    if (headers) {
      if (!newops || newops.length === 0) {
        headers.set(`x-limit`, '10');
      }

      if (newops[i].type === 'association_autoupdate') {
        headers.set(`association_autoupdate`, newops[i].value ?? '1');
      }
      if (newops[i].type === 'association_autocreate') {
        headers.set(`association_autocreate`, newops[i].value ?? '1');
      }
      if (
        newops[i].type === 'searchop' ||
        newops[i].type === 'searchor' ||
        newops[i].type === 'searchand'
      ) {
        headers.set(
          encodeURIComponent(`x-${newops[i].type}-${newops[i].op}-${newops[i].name}`),
          String(newops[i].value)
        );
      } else {
        headers.set(
          encodeURIComponent(
            `x-${newops[i].type}${newops[i].name && newops[i].name !== '' ? '-' + newops[i].name : ''}`
          ),
          String(newops[i].value)
        );
      }
    }
  }

  return newops;
};

/**
 * Retrieves the headers from an array of FetchAPIOperation objects and returns them as an object.
 *
 * @param {Array<FetchAPIOperation>} ops - The array of FetchAPIOperation objects.
 * @return {{ [key: string]: string }} - The headers as an object with string keys and string values.
 */
const GoAPIHeaders = (
  ops: Array<FetchAPIOperation>,
  headers?: Headers
): { [key: string]: string } => {
  const head = new Headers();
  const headerlist: Record<string, string> = {};

  const authToken = getAuthToken?.();
  if (authToken && authToken !== '') {
    head.set('Authorization', `Token ${authToken}`);
  } else {
    const token = getAuthToken();
    if (token) {
      head.set('Authorization', `Token ${token}`);
    }
  }

  if (headers) {
    headers.forEach((v, k) => {
      head.set(k, v);
    });
  }
  const distinctOperations: Array<FetchAPIOperation> = [];

  for (const value of ops?.filter((val) => !!val) ?? []) {
    const index = distinctOperations.findIndex(
      (searchValue) => searchValue.name === value.name && searchValue.type === value.type
    );
    if (index === -1) {
      distinctOperations.push(value);
    } else {
      distinctOperations[index] = value;
    }
  }

  buildGoAPIOperation(distinctOperations, head);

  head?.forEach((v, k) => {
    headerlist[k] = v;
  });

  if (headers) {
    for (const key of Object.keys(headerlist)) {
      headers.set(key, headerlist[key]);
    }
  }

  return headerlist;
};

const callbacks = {
  getAuthToken: () => {
    if (localStorage) {
      const token = localStorage.getItem(TOKEN_KEY);
      if (token) {
        return token;
      }
    }
    return undefined;
  },
};

/**
 * Retrieves the authentication token from local storage.
 *
 * @return {string | undefined} The authentication token if found, otherwise undefined
 */
const getAuthToken = () => callbacks?.getAuthToken?.();

const setAuthTokenCallback = (cb: () => string) => {
  callbacks.getAuthToken = cb;
  return callbacks.getAuthToken;
};

/**
 * Sets the authentication token in the local storage.
 *
 * @param {string} token - The authentication token to be set.
 */
const setAuthToken = (token: string) => {
  if (localStorage) {
    localStorage.setItem(TOKEN_KEY, token);
  }
};

export { buildGoAPIOperation, getAuthToken, GoAPIHeaders, setAuthToken, setAuthTokenCallback };