import { type IVtubersResponse, type IVtuberResponse, type IVtuber } from '@futureporn/types';
import { fpSlugify } from '@futureporn/utils';
import qs from 'qs';
import { getProminentColor } from '@futureporn/image';
import { getImage } from '@futureporn/scout/vtuber.js';
import { uploadFile } from '@futureporn/storage/s3.js';

/**
 * find or create vtuber in Strapi
 */
export async function upsertVtuber({ platform, userId, url, channel }: { platform: string, userId: string | null, url: string, channel: string }): Promise<number> {

    let vtuberId
    console.log('>> # 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 } }
      }
    })()
    console.log('>>>>> the following is findVtubersFilters.')
    console.log(findVtubersFilters)
  
    const findVtubersQueryString = qs.stringify({
      filters: findVtubersFilters
    }, { encode: false })
    console.log(`>>>>> platform=${platform}, url=${url}, userId=${userId}`)
  
    console.log('>> 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
    console.log('>> here is the vtuber json')
    console.log(findVtuberJson)
    if (findVtuberJson?.data && findVtuberJson.data.length > 0) {
      console.log('>> 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.')
      console.log('here is the findVtuberJson (as follows)')
      console.log(findVtuberJson)
      console.log(`the matching vtuber has ID=${vtuber.id} (${vtuber.attributes.displayName})`)
    }
  
    if (!vtuberId) {
      console.log('>> 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}`
  
      console.log(`>>> createVtuberRes here we go 3-2-1, POST!`)
      const createVtuberRes = await fetch(`${process.env.STRAPI_URL}/api/vtubers`, {
        method: 'POST',
        headers: {
          'authorization': `Bearer ${process.env.SCOUT_STRAPI_API_KEY}`,
          'content-type': 'application/json'
        },
        body: JSON.stringify({
          data: {
            displayName: channel,
            fansly: (platform === 'fansly') ? url : null,
            fanslyId: (platform === 'fansly') ? userId : null,
            chaturbate: (platform === 'chaturbate') ? url : null,
            slug: fpSlugify(channel),
            description1: ' ',
            image: imageCdnLink,
            themeColor: themeColor || '#dde1ec'
          }
        })
      })
      const createVtuberJson = await createVtuberRes.json() as IVtuberResponse
      console.log('>> createVtuberJson as follows')
      console.log(JSON.stringify(createVtuberJson, null, 2))
      if (createVtuberJson.data) {
        vtuberId = createVtuberJson.data.id
        console.log(`>>> vtuber created with id=${vtuberId}`)
      }
    }
    if (!vtuberId) throw new Error(`upsertVtuber failed to produce a vtuberId! This should not happen under normal circumstances.`);
    return vtuberId
  }