src/GenerateScript.ts

import { OriginalManuscript } from 'common-utils'
import Transitions from '../public/assets/transitions.json'
import { RenderUtils } from './RenderUtils'
import { YoutubeCategoriesConfig } from './models/Categories'

export function GenerateScript(Script: OriginalManuscript) {

  let fps = Script?.meta?.fps
  if (!fps) {
    Script.meta.fps = 24
    fps = 24
  }
  var durationInSec = 0
  var lastDirection = false;

  let preloadImages = []
  let preloadVideos = []

  let contents =
    Script.transcript
      .sort((t, u) => t.index - u.index)
      // .filter(item => (item.audioCaptionFile != undefined))
      // .slice(0, 2)
      .map((section, idx, array) => {
        section.index = section.index || idx;
        var { text, duration: durationMilis, offset, mediaAbsPaths, mediaAbsPaths, audioFullPath, title, pointers } = section
        mediaAbsPaths = mediaAbsPaths || mediaAbsPaths || []
        if (!durationMilis) {
          durationMilis = section.durationInSeconds * 1000
        }
        if (!durationMilis)
          durationMilis = 10e3
        // maybe required for youtube composition !!!
        let curDurSecs = (durationMilis / 1e3)
        if (curDurSecs < 3) {
          curDurSecs = 3
        }
        //@ts-ignore
        const transitionFile = (section?.transition_file || Transitions[0].file)
        const transition_type = (section?.transition_type)
        if (transition_type && transition_type != 'none') {
          section.transition_duration_sec = section?.transition_duration_sec || 0.5
        }
        //@ts-ignore
        const transitionDurationSec = (section?.transition_duration_sec || (transition_type && transition_type != 'none') ? 0.5 : 0)
        const transitionDurationFrames = transitionDurationSec * fps


        let commDuration = durationInSec //+ transitionDurationSec
        durationInSec = durationInSec + curDurSecs;///+ transitionDurationSec
        lastDirection = !lastDirection
        mediaAbsPaths.forEach(p => {
          let im = p.path
          if (im.startsWith("http")) {
            if (im.indexOf("-video-") > -1 || im.indexOf(".mp4") > -1 || im.indexOf(".webm") > -1) {
              preloadVideos.push(im)
              // preloadVideo(im)
            }
            else {
              preloadImages.push(im)
              // preloadImage(im)
            }
          }
        })
        let bgImagePaths = mediaAbsPaths.map(p => {
          p.path = RenderUtils.getFileName(p?.path)!!
          return p
        })
        if (!offset) {
          offset = commDuration
        }
        let frame = Object.assign(section, {
          "commulativeDurationStartSec": commDuration,
          "text": text,
          "transition_file": RenderUtils.getFileName(transitionFile),
          "durationInSecs": curDurSecs,
          "duration": Math.ceil(curDurSecs * fps),
          "offset": offset * fps,
          "direction": lastDirection ? 'left' : 'right',
          "bgImagePaths": bgImagePaths,
          "audioPath": RenderUtils.getFileName(audioFullPath),
          "textColor": '#F44336',
          "emphasisOnImage": title?.length > 0 && pointers?.length > 0 || Script.meta.emphasisOnImage
        })

        return frame
      })

  console.log('contents', contents)
  const intro = {
    durationInFrames: 0,
    durationInSec: 5.433,
    file: Script.meta.tenantVideoConfig ? RenderUtils.getFileName(Script.meta.tenantVideoConfig.introFile, "assets") : 'assets/music_intro.mp4'
  }
  let ADJUST_END_DUR_SEC = 3
  const outro = {
    durationInFrames: 0,
    durationInSec: 8.034 - ADJUST_END_DUR_SEC,
    file: Script.meta.tenantVideoConfig ? RenderUtils.getFileName(Script.meta.tenantVideoConfig.outroFile, "assets") : 'assets/music_outro.mp4'
  }

  if (intro && Script?.meta?.tenantVideoConfig?.introFile) {
    durationInSec += intro.durationInSec
    intro.durationInFrames = Math.ceil(fps * intro.durationInSec)
  }

  if (outro && Script?.meta?.tenantVideoConfig?.outroFile) {
    durationInSec += outro.durationInSec
    //hack for blank end
    outro.durationInSec += 30
    outro.durationInFrames = Math.ceil(fps * outro.durationInSec)
  }

  // durationInSec = 10
  const duration = Math.ceil(durationInSec * fps)
  console.log("Total Video Duration", durationInSec)

  //@ts-ignore
  const playListsIDs = YoutubeCategoriesConfig.GET_PLAY_LIST_IDS(Script.meta?.userId || "104349087108535511186")

  return {
    Script,
    contents,
    playListsIDs,
    duration,
    outro,
    intro
  }
}