import * as utils from '../src/utils';
import { registerBidder } from '../src/adapters/bidderFactory';
import { BANNER, VIDEO } from '../src/mediaTypes';

const BIDDER_CODE = 'cedato';
const BID_URL = '//h.cedatoplayer.com/hb';
const SYNC_URL = '//h.cedatoplayer.com/hb_usync?uid={UUID}';
const COOKIE_NAME = 'hb-cedato-id';
const UUID_LEN = 36;
const TTL = 10000;
const CURRENCY = 'USD';
const FIRST_PRICE = 1;
const NET_REVENUE = true;

export const spec = {
  code: BIDDER_CODE,
  supportedMediaTypes: [BANNER, VIDEO],

  isBidRequestValid: function(bid) {
    return !!(
      bid &&
      bid.params &&
      bid.params.player_id &&
      utils.checkCookieSupport() &&
      utils.cookiesAreEnabled()
    );
  },

  buildRequests: function(bidRequests, bidderRequest) {
    const req = bidRequests[Math.floor(Math.random() * bidRequests.length)];
    const params = req.params;
    const at = FIRST_PRICE;
    const site = { id: params.player_id, domain: document.domain };
    const device = { ua: navigator.userAgent };
    const user = { id: getUserID() }
    const currency = CURRENCY;
    const tmax = bidderRequest.timeout;

    const imp = bidRequests.map(req => {
      const banner = getMediaType(req, 'banner');
      const video = getMediaType(req, 'video');
      const bidfloor = params.bidfloor;
      const bidId = req.bidId;
      const adUnitCode = req.adUnitCode;

      return {
        bidId,
        banner,
        video,
        adUnitCode,
        bidfloor,
      };
    });

    const payload = {
      version: '$prebid.version$',
      at,
      site,
      device,
      user,
      imp,
      currency,
      tmax,
    };

    if (bidderRequest && bidderRequest.gdprConsent) {
      payload.gdpr_consent = {
        consent_string: bidderRequest.gdprConsent.consentString,
        consent_required: bidderRequest.gdprConsent.gdprApplies
      };
    }

    return {
      method: 'POST',
      url: params.bid_url || BID_URL,
      data: JSON.stringify(payload),
      bidderRequest
    };
  },

  interpretResponse: function(resp, {bidderRequest}) {
    resp = resp.body;
    const bids = [];

    if (!resp) {
      return bids;
    }

    resp.seatbid[0].bid.map(serverBid => {
      const bid = newBid(serverBid, bidderRequest);
      bid.currency = resp.cur;
      bids.push(bid);
    });

    return bids;
  },

  getUserSyncs: function(syncOptions, resps, gdprConsent) {
    const syncs = [];
    if (syncOptions.iframeEnabled) {
      syncs.push(getSync('iframe', gdprConsent));
    } else if (syncOptions.pixelEnabled) {
      syncs.push(getSync('image', gdprConsent));
    }
    return syncs;
  }
}

function getMediaType(req, type) {
  const { mediaTypes } = req;

  if (!mediaTypes) {
    return;
  }

  switch (type) {
    case 'banner':
      if (mediaTypes.banner) {
        const { sizes } = mediaTypes.banner;
        return {
          format: getFormats(sizes)
        };
      }
      break;

    case 'video':
      if (mediaTypes.video) {
        const { playerSize, context } = mediaTypes.video;
        return {
          context: context,
          format: getFormats(playerSize)
        };
      }
  }
}

function newBid(serverBid, bidderRequest) {
  const bidRequest = utils.getBidRequest(serverBid.uuid, [bidderRequest]);

  const cpm = serverBid.price;
  const requestId = serverBid.uuid;
  const width = serverBid.w;
  const height = serverBid.h;
  const creativeId = serverBid.crid;
  const dealId = serverBid.dealid;
  const mediaType = serverBid.media_type;
  const netRevenue = NET_REVENUE;
  const ttl = TTL;

  const bid = {
    cpm,
    requestId,
    width,
    height,
    mediaType,
    creativeId,
    dealId,
    netRevenue,
    ttl,
  };

  if (mediaType == 'video') {
    const videoContext = utils.deepAccess(bidRequest, 'mediaTypes.video.context');

    if (videoContext == 'instream') {
      bid.vastUrl = serverBid.vast_url;
      bid.vastImpUrl = serverBid.notify_url;
    }
  } else {
    bid.ad = serverBid.adm;
  }

  return bid;
}

const getSync = (type, gdprConsent) => {
  const uuid = getUserID();
  const syncUrl = SYNC_URL;
  let params = '&type=' + type;
  if (gdprConsent && typeof gdprConsent.consentString === 'string') {
    if (typeof gdprConsent.gdprApplies === 'boolean') {
      params += `&gdpr=${Number(gdprConsent.gdprApplies)}&gdpr_consent=${gdprConsent.consentString}`;
    } else {
      params += `&gdpr_consent=${gdprConsent.consentString}`;
    }
  }
  return {
    type: type,
    url: syncUrl.replace('{UUID}', uuid) + params,
  };
}

const getUserID = () => {
  const cookieName = COOKIE_NAME;
  const uuidLen = UUID_LEN;

  const i = document.cookie.indexOf(cookieName);

  if (i === -1) {
    const uuid = utils.generateUUID();
    document.cookie = `${cookieName}=${uuid}; path=/`;
    return uuid;
  }

  const j = i + cookieName.length + 1;
  return document.cookie.substring(j, j + uuidLen);
};

const getFormats = arr => arr.map((s) => {
  return { w: s[0], h: s[1] };
});

registerBidder(spec);
