const {query} = require("../client")
const {Comment} = require("./Comment")

class Chapter {
  /**
   * @param {string} id 
   * @param {string} title 
   * @param {string} author 
   * @param {string} source 
   * @param {string | Date} createdDate 
   * @param {string | Date} fictionalDate 
   * @param {string | Date} editedDate
   * @param {boolean} canComment
   * @param {"Disabled"|"Article"|"Chat"|"Message"} commentMode
   * @param {boolean} commentsLocked
   * @param {any[]} comments
   */
  constructor(id, title, author, source, createdDate, fictionalDate, editedDate, canComment, commentMode, commentsLocked, comments) {
    this.id = id
    this.title = title
    this.author = author
    this.source = source
    this.createdDate = new Date(createdDate)
    this.fictionalDate = fictionalDate != null ? new Date(fictionalDate) : null
    this.editedDate = new Date(editedDate)
    this.canComment = canComment
    this.commentMode = commentMode
    this.commentsLocked = commentsLocked
    this.comments = (comments||[]).map(c => Comment.fromData(c))
  }
}

class ChapterAPI {
  /**
   * Call `addChapter(input)` mutation, returns the entire object.
   * 
   * @param {{id:string, storyId:string, title:string, author?:string, fictionalDate?:Date, source: string}} input
   * @returns {Promise<Chapter>} 
   */
  addChapter(input) {
    return query(`
      mutation AddChapter($input: ChapterAddInput!) {
        addChapter(input: $input) {
          id
          title
          author
          source
          createdDate
          fictionalDate
          editedDate
        }
      }
    `, {input}, {permissions: ["member", "story.add"]}).then((data) => {
      const ac = data.addChapter

      return new Chapter(ac.id, ac.title, ac.author, ac.source, ac.createdDate, ac.fictionalDate, ac.editedDate)
    })
  }

  /**
   * Call `editChapter(input)` mutation, returns editable fields
   * 
   * @param {{id:string, title:string, fictionalDate:Date, source: string}} input
   * @returns {Promise<{title:string, fictionalDate:Date, source:string}>} 
   */
  editChapter(input) {
    return query(`
      mutation EditChapter($input: ChapterEditInput!) {
        editChapter(input: $input) {
          title
          fictionalDate
          source
        }
      }
    `, {input}, {permissions: ["member", "story.edit"]}).then(({editChapter}) => {
      if (editChapter.fictionalDate != null) {
        editChapter.fictionalDate = new Date(editChapter.fictionalDate)
      }

      return editChapter
    })
  }

  /**
   * Call `moveChapter(input)` mutation, returns the ID.
   * 
   * @param {{id:string, storyId:string}} input
   * @returns {Promise<{id:string}>} 
   */
  moveChapter(input) {
    return query(`
      mutation MoveChapter($input: ChapterMoveInput!) {
        moveChapter(input: $input) {
          id
        }
      }
    `, {input}, {permissions: ["member", "story.move"]}).then(({moveChapter}) => {
      return moveChapter
    })
  }

  /**
   * Call `removeChapter(input)` mutation, returns only the id
   * 
   * @param {{id:string}} input
   * @returns {Promise<{id: string}>} 
   */
  removeChapter(input) {
    return query(`
      mutation RemoveChapter($input: ChapterRemoveInput!) {
        removeChapter(input: $input) {
          id
        }
      }
    `, {input}, {permissions: ["member", "story.edit"]}).then(({removeChapter}) => {
      return removeChapter
    })
  }
}

module.exports = {Chapter, chapterApi: new ChapterAPI}