module.exports = class {
  onCreate(input) {
    this.state = {
      story: input.story,
      modal: null,
      removed: false,
    }
  }

  open(modal) {
    this.state.modal = modal
  }

  close() {
    this.state.modal = null
  }

  updateStory(data) {
    this.state.story = Object.assign(Object.assign({}, this.state.story), data)
  }

  addChapter(chapter) {
    this.state.story.chapters.push(chapter)
    this.refreshStory()
  }

  moveChapter(chapter, data) {
    if (data.storyId !== this.state.story.id) {
      this.state.story = Object.assign({}, this.state.story, {chapters: this.state.story.chapters.filter(ch => ch.id !== chapter.id)})
    }
  }

  updateChapter(id, data) {
    const index = this.state.story.chapters.findIndex(ch => ch.id === id)
    if (index === -1) {
      return
    }

    this.state.story.chapters[index] = Object.assign({}, this.state.story.chapters[index], data);

    this.refreshStory()
  }

  removeChapter(id) {
    const index = this.state.story.chapters.findIndex(ch => ch.id === id)
    if (index === -1) {
      return
    }

    this.state.story.chapters.splice(index, 1)

    this.refreshStory()
  }

  menuSelect(kind, id) {
    switch (kind) {
      case "add":
        this.open("chapter.add")
        break
    }
  }

  updateStoryTags(tags) {
    this.state.story.tags = tags
    this.refreshStory()
  }

  timeToDie() {
    this.state.removed = true
  }

  refreshStory() {
    this.state.story = Object.assign({}, this.state.story)
  }
}