const moment = require("moment")

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

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

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

    return title
  }

  select(kind, id) {
    if (kind === "chapter") {
      this.state.selectedChapter = id
    }

    this.emit("select", kind, id)
  }
}