/*
 * Collect api fetch commands for actions here
 * (chunk and tiles requests in ui/ChunkLoader*.js)
 *
 */

import { t } from 'ttag';

import { dateToString } from '../../core/utils';

export const shardHost = (function getShardHost() {
  if (!window.ssv
    || !window.ssv.shard
    || window.location.host === 'fuckyouarkeros.fun'
  ) {
    return '';
  }
  const hostParts = window.location.host.split('.');
  if (hostParts.length > 2) {
    hostParts.shift();
  }
  return `${window.ssv.shard}.${hostParts.join('.')}`;
}());
export const shardOrigin = shardHost
  && `${window.location.protocol}//${shardHost}`;

/*
 * Adds customizable timeout to fetch
 * defaults to 8s
 */
async function fetchWithTimeout(url, options = {}) {
  const { timeout = 30000 } = options;

  const controller = new AbortController();
  const id = setTimeout(() => controller.abort(), timeout);

  const response = await fetch(url, {
    ...options,
    signal: controller.signal,
  });
  clearTimeout(id);

  return response;
}

/*
 * Parse response from API
 * @param response
 * @return Object of response
 */
async function parseAPIresponse(response) {
  const { status: code } = response;

  if (code === 429) {
    let error = t`You made too many requests`;
    const retryAfter = response.headers.get('Retry-After');
    if (!Number.isNaN(Number(retryAfter))) {
      const ti = Math.floor(retryAfter / 60);
      error += `, ${t`try again after ${ti}min`}`;
    }
    return {
      errors: [error],
    };
  }

  try {
    return await response.json();
  } catch (e) {
    return {
      errors: [t`Connection error ${code} :(`],
    };
  }
}

/*
 * Make API POST Request
 * @param url URL of post api endpoint
 * @param body Body of request
 * @return Object with response or error Array
 */
async function makeAPIPOSTRequest(
  url,
  body,
  credentials = true,
  addShard = true,
) {
  if (addShard) {
    url = `${shardOrigin}${url}`;
  }
  try {
    const response = await fetchWithTimeout(url, {
      method: 'POST',
      credentials: (credentials) ? 'include' : 'omit',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify(body),
    });

    return parseAPIresponse(response);
  } catch (e) {
    return {
      errors: [t`Could not connect to server, please try again later :(`],
    };
  }
}

/*
 * Make API GET Request
 * @param url URL of get api endpoint
 * @return Object with response or error Array
 */
async function makeAPIGETRequest(
  url,
  credentials = true,
  addShard = true,
) {
  if (addShard) {
    url = `${shardOrigin}${url}`;
  }
  try {
    const response = await fetchWithTimeout(url, {
      credentials: (credentials) ? 'include' : 'omit',
    });

    return parseAPIresponse(response);
  } catch (e) {
    return {
      errors: [t`Could not connect to server, please try again later :(`],
    };
  }
}

/*
 * block / unblock user
 * @param userId id of user to block
 * @param block true if block, false if unblock
 * @return error string or null if successful
 */
export async function requestBlock(userId, block) {
  const res = await makeAPIPOSTRequest(
    '/api/block',
    { userId, block },
  );
  if (res.errors) {
    return res.errors[0];
  }
  if (res.status === 'ok') {
    return null;
  }
  return t`Unknown Error`;
}

/*
 * set / unset profile as private
 * @param priv
 * @return error string or null if successful
 */
export async function requestPrivatize(priv) {
  const res = await makeAPIPOSTRequest(
    '/api/privatize',
    { priv },
  );
  if (res.errors) {
    return res.errors[0];
  }
  if (res.status === 'ok') {
    return null;
  }
  return t`Unknown Error`;
}

/*
 * start new DM channel with user
 * @param query Object with either userId or userName: string
 * @return channel Array on success, error string if not
 */
export async function requestStartDm(query) {
  const res = await makeAPIPOSTRequest(
    '/api/startdm',
    query,
  );
  if (res.errors) {
    return res.errors[0];
  }
  if (res.channel) {
    return res.channel;
  }
  return t`Unknown Error`;
}

/*
 * set receiving of all DMs on/off
 * @param block true if blocking all dms, false if unblocking
 * @return error string or null if successful
 */
export async function requestBlockDm(block) {
  const res = await makeAPIPOSTRequest(
    '/api/blockdm',
    { block },
  );
  if (res.errors) {
    return res.errors[0];
  }
  if (res.status === 'ok') {
    return null;
  }
  return t`Unknown Error`;
}

/*
 * leaving Chat Channel (i.e. DM channel)
 * @param channelId integer id of channel
 * @return error string or null if successful
 */
export async function requestLeaveChan(channelId) {
  const res = await makeAPIPOSTRequest(
    '/api/leavechan',
    { channelId },
  );
  if (res.errors) {
    return res.errors[0];
  }
  if (res.status === 'ok') {
    return null;
  }
  return t`Unknown Error`;
}

export async function requestSolveCaptcha(text, captchaid) {
  const res = await makeAPIPOSTRequest(
    '/api/captcha',
    { text, id: captchaid },
  );
  if (!res.errors && !res.success) {
    return {
      errors: [t`Server answered with gibberish :(`],
    };
  }
  return res;
}

export async function requestHistoricalTimes(day, canvasId) {
  try {
    const date = dateToString(day);
    // Not going over shard url
    const url = `/history?day=${date}&id=${canvasId}`;
    const response = await fetchWithTimeout(url, {
      credentials: 'omit',
      timeout: 45000,
    });
    if (response.status !== 200) {
      return [];
    }
    const times = await response.json();
    const parsedTimes = times
      .map((a) => `${a.substring(0, 2)}:${a.substring(2)}`);
    return [
      '00:00',
      ...parsedTimes,
    ];
  } catch {
    return [];
  }
}

export async function requestChatMessages(cid) {
  const response = await fetch(
    `${shardOrigin}/api/chathistory?cid=${cid}&limit=50`,
    { credentials: 'include' },
  );
  // timeout in order to not spam api requests and get rate limited
  if (response.ok) {
    const { history } = await response.json();
    return history;
  }
  return null;
}

export function requestPasswordChange(newPassword, password) {
  return makeAPIPOSTRequest(
    '/api/auth/change_passwd',
    { password, newPassword },
  );
}

export async function requestResendVerify() {
  return makeAPIGETRequest(
    '/api/auth/resend_verify',
  );
}

export async function requestLogOut() {
  const ret = makeAPIGETRequest(
    '/api/auth/logout',
  );
  return !ret.errors;
}

export function requestNameChange(name) {
  return makeAPIPOSTRequest(
    '/api/auth/change_name',
    { name },
  );
}

export function requestMailChange(email, password) {
  return makeAPIPOSTRequest(
    '/api/auth/change_mail',
    { email, password },
  );
}

export function requestLogin(nameoremail, password) {
  return makeAPIPOSTRequest(
    '/api/auth/local',
    { nameoremail, password },
  );
}

export function requestRegistration(name, email, password, captcha, captchaid) {
  return makeAPIPOSTRequest(
    '/api/auth/register',
    {
      name, email, password, captcha, captchaid,
    },
  );
}

export function requestNewPassword(email) {
  return makeAPIPOSTRequest(
    '/api/auth/restore_password',
    { email },
  );
}

export function requestDeleteAccount(password) {
  return makeAPIPOSTRequest(
    '/api/auth/delete_account',
    { password },
  );
}

export function requestRankings() {
  return makeAPIGETRequest(
    '/ranking',
    false,
  );
}

export function requestBanInfo() {
  return makeAPIGETRequest(
    '/api/baninfo',
  );
}

export async function requestMe() {
  if (window.me) {
    // api/me gets pre-fetched by embedded script in html
    const response = await window.me;
    delete window.me;
    return parseAPIresponse(response);
  }
  return makeAPIGETRequest(
    '/api/me',
  );
}

export function requestIID() {
  return makeAPIGETRequest(
    '/api/getiid',
  );
}

export function requestBanMe(code) {
  return makeAPIPOSTRequest(
    '/api/banme',
    { code },
  );
}