import { type NotificationData } from '@futureporn/types'
import { type Helpers } from 'graphile-worker'
import { 
    type IStreamResponse, 
    type IStreamsResponse, 
    type IPlatformNotificationResponse,
    type IVtubersResponse,
    type IVtuberResponse,
    type IVtuber,
} from '@futureporn/types'
import { subMinutes, addMinutes } from 'date-fns'
import qs from 'qs'
import { getProminentColor } from '@futureporn/image'
import { getImage } from '@futureporn/scout/vtuber.js'
import { fpSlugify } from '@futureporn/utils'
import { uploadFile } from '@futureporn/storage/s3.js'

export async function upsertStream({
  date,
  vtuberId,
  platform,
  pNotifId
}: {
  date: string,
  vtuberId: number,
  platform: string,
  pNotifId: number
}, helpers: Helpers): Promise<number> {

  if (!date) throw new Error(`upsertStream requires date in the arg object, but it was undefined`);
  if (!vtuberId) throw new Error(`upsertStream requires vtuberId in the arg object, but it was undefined`);
  if (!platform) throw new Error(`upsertStream requires platform in the arg object, but it was undefined`);
  if (!pNotifId) throw new Error(`upsertStream requires pNotifId in the arg object, but it was undefined`);

  let streamId
  // # Step 3.
  // Finally we find or create the stream record
  // The stream may already be in the db (the streamer is multi-platform streaming), so we look for that record.
  // This gets a bit tricky. How do we determine one stream from another?
  // For now, the rule is 30 minutes of separation. 
  // Anything <=30m is interpreted as the same stream. Anything >30m is interpreted as a different stream.
  // If the stream is not in the db, we create the stream record
  const dateSinceRange = subMinutes(new Date(date), 30)
  const dateUntilRange = addMinutes(new Date(date), 30)
  helpers.logger.info(`Find a stream within + or - 30 mins of the notif date=${new Date(date).toISOString()}. dateSinceRange=${dateSinceRange.toISOString()}, dateUntilRange=${dateUntilRange.toISOString()}`)
  const findStreamQueryString = qs.stringify({
    populate: 'platform-notifications',
    filters: {
      date: {
        $gte: dateSinceRange,
        $lte: dateUntilRange
      },
      vtuber: {
        id: {
          '$eq': vtuberId
        }
      }
    }
  }, { encode: false })

  helpers.logger.info('>> findStream')
  const findStreamRes = await fetch(`${process.env.STRAPI_URL}/api/streams?${findStreamQueryString}`, {
    method: 'GET',
    headers: {
      'authorization': `Bearer ${process.env.SCOUT_STRAPI_API_KEY}`,
      'Content-Type': 'application/json'
    }
  })
  const findStreamData = await findStreamRes.json() as IStreamsResponse
  if (findStreamData?.data && findStreamData.data.length > 0) {
    helpers.logger.info('>> we found a findStreamData json. (there is an existing stream for this e-mail/notification)')
    helpers.logger.info(JSON.stringify(findStreamData, null, 2))
    const stream = findStreamData.data[0]
    if (!stream) throw new Error('stream was undefined');
    streamId = stream.id

    // Before we're done here, we need to do something extra. We need to populate isChaturbateStream and/or isFanslyStream.
    // We know which of these booleans to set based on the stream's related platformNotifications
    // We go through each pNotif and look at it's platform
    let isFanslyStream = false
    let isChaturbateStream = false
    if (stream.attributes.platformNotifications) {
      for (const pn of stream.attributes.platformNotifications) {
        if (pn.attributes.platform === 'fansly') {
          isFanslyStream = true
        } else if (pn.attributes.platform === 'chaturbate') {
          isChaturbateStream = true
        }
      }
    }


    helpers.logger.info(`>>> updating stream ${streamId}. isFanslyStream=${isFanslyStream}, isChaturbateStream=${isChaturbateStream}`)
    const updateStreamRes = await fetch(`${process.env.STRAPI_URL}/api/streams/${streamId}`, {
      method: 'PUT',
      headers: {
        'authorization': `Bearer ${process.env.SCOUT_STRAPI_API_KEY}`,
        'content-type': 'application/json'
      },
      body: JSON.stringify({
        data: {
          isFanslyStream: isFanslyStream,
          isChaturbateStream: isChaturbateStream,
          platformNotifications: [
            pNotifId
          ]
        }
      })
    })
    const updateStreamJson = await updateStreamRes.json() as IStreamResponse
    if (updateStreamJson?.error) throw new Error(JSON.stringify(updateStreamJson, null, 2));
    helpers.logger.info(`>> assuming a successful update to the stream record. response as follows.`)
    helpers.logger.info(JSON.stringify(updateStreamJson, null, 2))
  }

  if (!streamId) {
    helpers.logger.info('>> did not find a streamId, so we go ahead and create a stream record in the db.')
    const createStreamPayload = {
      data: {
        isFanslyStream: (platform === 'fansly') ? true : false,
        isChaturbateStream: (platform === 'chaturbate') ? true : false,
        archiveStatus: 'missing',
        date: date,
        date2: date,
        date_str: date,
        vtuber: vtuberId,
        platformNotifications: [
          pNotifId
        ]
      }
    }
    helpers.logger.debug('>> createStreamPayload as follows')
    helpers.logger.debug(JSON.stringify(createStreamPayload, null, 2))
    const createStreamRes = await fetch(`${process.env.STRAPI_URL}/api/streams`, {
      method: 'POST',
      headers: {
        'authorization': `Bearer ${process.env.SCOUT_STRAPI_API_KEY}`,
        "Content-Type": "application/json"
      },
      body: JSON.stringify(createStreamPayload)
    })
    const createStreamJson = await createStreamRes.json() as IStreamResponse
    helpers.logger.debug('>> we got the createStreamJson')
    helpers.logger.debug(JSON.stringify(createStreamJson, null, 2))
    if (createStreamJson.error) {
      console.error(JSON.stringify(createStreamJson.error, null, 2))
      throw new Error('Failed to create stream in DB due to an error. (see above)')
    }
    streamId = createStreamJson.data.id
  }

  if (!streamId) throw new Error('failed to get streamId')
  return streamId
}


export async function upsertPlatformNotification({ source, date, platform, vtuberId }: { source: string, date: string, platform: string, vtuberId: number }, helpers: Helpers): Promise<number> {
    helpers.logger.info('hello from upsertPlatformNotification', { source, date, platform, vtuberId });
  
    if (!source) throw new Error(`upsertPlatformNotification requires source arg, but it was undefined`);
    if (!date) throw new Error(`upsertPlatformNotification requires date arg, but it was undefined`);
    if (!platform) throw new Error(`upsertPlatformNotification requires platform arg, but it was undefined`);
    if (!vtuberId) throw new Error(`upsertPlatformNotification requires vtuberId arg, but it was undefined`);
  
    let pNotifId
    // # Step 2.
    // Next we create the platform-notification record.
    // This probably doesn't already exist, so we don't check for a pre-existing platform-notification.
    const pNotifPayload = {
      data: {
        source: source,
        date: date,
        date2: date,
        platform: platform,
        vtuber: vtuberId,
      }
    }
    helpers.logger.debug('pNotifPayload as follows')
    helpers.logger.debug(JSON.stringify(pNotifPayload, null, 2))
  
    const pNotifCreateRes = await fetch(`${process.env.STRAPI_URL}/api/platform-notifications`, {
      method: 'POST',
      headers: {
        'authorization': `Bearer ${process.env.SCOUT_STRAPI_API_KEY}`,
        'Content-Type': 'application/json'
      },
      body: JSON.stringify(pNotifPayload)
    })
    const pNotifData = await pNotifCreateRes.json() as IPlatformNotificationResponse
    if (pNotifData.error) {
      helpers.logger.error('>> we failed to create platform-notification, there was an error in the response')
      helpers.logger.error(JSON.stringify(pNotifData.error, null, 2))
      throw new Error(pNotifData.error)
    }
    helpers.logger.debug(`>> pNotifData (json response) is as follows`)
    helpers.logger.debug(JSON.stringify(pNotifData, null, 2))
    if (!pNotifData.data?.id) throw new Error('failed to created pNotifData! The response was missing an id');
  
    pNotifId = pNotifData.data.id
    if (!pNotifId) throw new Error('failed to get Platform Notification ID');
    return pNotifId
  
  }
  export async function upsertVtuber({ platform, userId, url, channel }: { platform: string, userId: string | null, url: string, channel: string }, helpers: Helpers): Promise<number> {

    let vtuberId
    helpers.logger.debug('>> # Step 1, upsertVtuber')
    // # Step 1.
    // First we find or create the vtuber
    // The vtuber may already be in the db, so we look for that record. All we need is the Vtuber ID.
    // If the vtuber is not in the db, we create the vtuber record.
  
    // GET /api/:pluralApiId?filters[field][operator]=value
    const findVtubersFilters = (() => {
      if (platform === 'chaturbate') {
        return { chaturbate: { $eq: url } }
      } else if (platform === 'fansly') {
        if (!userId) throw new Error('Fansly userId was undefined, but it is required.')
        return { fanslyId: { $eq: userId } }
      }
    })()
    helpers.logger.debug('>>>>> the following is findVtubersFilters.')
    helpers.logger.debug(JSON.stringify(findVtubersFilters, null, 2))
  
    const findVtubersQueryString = qs.stringify({
      filters: findVtubersFilters
    }, { encode: false })
    helpers.logger.debug(`>>>>> platform=${platform}, url=${url}, userId=${userId}`)
  
    helpers.logger.debug('>> findVtuber')
    const findVtuberRes = await fetch(`${process.env.STRAPI_URL}/api/vtubers?${findVtubersQueryString}`, {
      method: 'GET',
      headers: {
        'content-type': 'application/json'
      }
    })
    const findVtuberJson = await findVtuberRes.json() as IVtubersResponse
    helpers.logger.debug('>> here is the vtuber json')
    helpers.logger.debug(JSON.stringify(findVtuberJson, null, 2))
    if (findVtuberJson?.data && findVtuberJson.data.length > 0) {
      helpers.logger.debug('>> a vtuber was FOUND')
      if (findVtuberJson.data.length > 1) throw new Error('There were more than one vtuber matches in the response. There must only be one.');
      const vtuber = findVtuberJson.data[0]
      if (!vtuber) throw new Error('vtuber did not have an id. vtuber must have an id.')
      helpers.logger.debug('here is the findVtuberJson (as follows)')
      helpers.logger.debug(JSON.stringify(findVtuberJson, null, 2))
      helpers.logger.debug(`the matching vtuber has ID=${vtuber.id} (${vtuber.attributes.displayName})`)
    }
  
    if (!vtuberId) {
      helpers.logger.info('>> vtuberId was not found so we create')
  
      /**
       * We are creating a vtuber record.
       * We need a few things.
       *   * image URL
       *   * themeColor
       * 
       * To get an image, we have to do a few things.
       *   * [x] download image from platform
       *   * [x] get themeColor from image
       *   * [x] upload image to b2
       *   * [x] get B2 cdn link to image
       * 
       * To get themeColor, we need the image locally where we can then run 
       */
  
      // download image from platform
      // vtuber.getImage expects a vtuber object, which we don't have yet, so we create a dummy one
      const dummyVtuber: IVtuber = {
        id: 69,
        attributes: {
          slug: fpSlugify(channel),
          displayName: 'example',
          vods: [],
          description1: ' ',
          image: ' ',
          themeColor: ' ',
          fanslyId: (platform === 'fansly') ? (userId ? userId : undefined) : undefined
        }
      }
      const imageFile = await getImage(dummyVtuber)
  
      // get themeColor from image
      const themeColor = await getProminentColor(imageFile)
  
      // upload image to b2
      const b2FileData = await uploadFile(imageFile)
  
      // get b2 cdn link to image
      const imageCdnLink = `${process.env.CDN_BUCKET_URL}/${b2FileData.Key}`
  
      helpers.logger.info(`>>> createVtuberRes here we go 3-2-1, POST!`)
      const createVtuberRes = await fetch(`${process.env.STRAPI_URL}/api/vtubers`, {
        method: 'POST',
        headers: {
          'authorization': `Bearer ${process.env.SCOUT_STRAPI_API_KEY}`,
          'content-type': 'application/json'
        },
        body: JSON.stringify({
          data: {
            displayName: channel,
            fansly: (platform === 'fansly') ? url : null,
            fanslyId: (platform === 'fansly') ? userId : null,
            chaturbate: (platform === 'chaturbate') ? url : null,
            slug: fpSlugify(channel),
            description1: ' ',
            image: imageCdnLink,
            themeColor: themeColor || '#dde1ec'
          }
        })
      })
      const createVtuberJson = await createVtuberRes.json() as IVtuberResponse
      helpers.logger.info('>> createVtuberJson as follows')
      helpers.logger.info(JSON.stringify(createVtuberJson, null, 2))
      if (createVtuberJson.data) {
        vtuberId = createVtuberJson.data.id
        helpers.logger.info(`>>> vtuber created with id=${vtuberId}`)
      }
    }
    if (!vtuberId) throw new Error(`upsertVtuber failed to produce a vtuberId! This should not happen under normal circumstances.`);
    return vtuberId
  }

export default async function (payload: NotificationData, helpers: Helpers) {
    const source = 'email'
    const { url, platform, channel, displayName, date, userId, avatar } = payload
    helpers.logger.info(`process_notif_email task execution has begun with date=${date}, channel=${channel}, platform=${platform}, url=${url}, displayName=${displayName}, avatar=${avatar}`);
    const vtuberId = await upsertVtuber({channel, platform, url, userId }, helpers);
    const pNotifId = await upsertPlatformNotification({date, platform, source, vtuberId}, helpers);
    const streamId = await upsertStream({date, platform, pNotifId, vtuberId}, helpers);
    return `vtuberId: ${vtuberId} | pNotifId: ${pNotifId} | streamId: ${streamId}`;
}