const moment = require("moment")

module.exports = class {
  onCreate(input) {
    this.state = {
      chapterTitles: {},
      fdateLink: "",
      fdate: "",
      selectedChapter: ""
    }
  }

  onMount() {
    this.state.selectedChapter = (window.location.hash||"#").slice(1)
  }

  onInput(input) {
    if (input.story.fictionalDate && input.story.fictionalDate.getUTCFullYear() > 10) {
      const fdate = input.story.fictionalDate
      
      this.state.fdateLink = `/story/by-month/${moment(fdate).format("YYYY-MM")}`
      this.state.fdate = moment(fdate).format("MMM D, YYYY")
    }

    for (const chapter of input.story.chapters) {
      let title = "Chapter " + input.story.chapters.indexOf(chapter) + 1
      if (chapter.title) {
        title = chapter.title
      } else if (chapter.fictionalDate && chapter.fictionalDate.getUTCFullYear() > 1) {
        title = moment(chapter.fictionalDate).format("MMM D, YYYY")
      }

      this.state.chapterTitles[chapter.id] = title
    }
  }

  selectChapter(id) {
    this.state.selectedChapter = id
  }
}