import {
  _decorator,
  Component,
  instantiate,
  Label,
  Node,
  Prefab,
  Vec3,
} from "cc";
import { EventDispatcher } from "../libs/EventDispatcher";
import { GlobalData } from "../config/GlobalData";
import { DataManager } from "../libs/DataManager";
import Common from "../libs/Common";
const { ccclass, property } = _decorator;

@ccclass("NoteManager")
export class NoteManager extends Component {
  // 音符的预制体
  @property(Prefab)
  private notePrefab: Prefab = null;

  // 基准线的节点
  @property(Node)
  lineNode: Node = null;

  // 定义基准线的坐标
  private linePosition: Vec3 = new Vec3(0, 0, 0);

  // 显示当前有多少个音符的 label
  @property(Label)
  noteCountLabel: Label = null;

  // 音符的数组
  private noteArray: any[] = [];

  onLoad() {
    // 监听清除所有音符事件
    EventDispatcher.getTarget().on(
      EventDispatcher.CLEAR_ALL_NOTE,
      this.clearAllNote,
      this,
    );

    // 监听过关事件
    EventDispatcher.getTarget().on(
      EventDispatcher.PASS_LEVLE,
      this.reGenerateNotes,
      this,
    );
    // 获取基准线的坐标
    this.linePosition = this.lineNode.getPosition();
  }

  async start() {
    // 获取当前关卡音符数据
    this.noteArray = await Common.loadMusicNoteData(GlobalData.selectedMusicID);

    this.createNotes();
    this.updateNoteCount();
  }

  // 创建音符
  private createNotes() {
    for (let i = 0; i < this.noteArray.length; i++) {
      const note = instantiate(this.notePrefab);
      let noteX = 0;
      if (this.noteArray[i].trackType == 0) {
        noteX = -180;
      } else if (this.noteArray[i].trackType == 1) {
        noteX = 0;
      } else if (this.noteArray[i].trackType == 2) {
        noteX = 180;
      }
      const noteY =
        GlobalData.noteSpeed * this.noteArray[i].timePoint +
        this.linePosition.y;

      note.setPosition(noteX, noteY);
      this.node.addChild(note);
    }
  }

  // 清除所有音符
  private clearAllNote() {
    // 清除所有音符节点
    this.node.removeAllChildren();
  }

  // 重新生成音符
  private async reGenerateNotes() {
    // 获取当前关卡音符数据
    this.clearAllNote();
    this.noteArray = await Common.loadMusicNoteData(GlobalData.selectedMusicID);
    this.createNotes();
    this.updateNoteCount();
  }

  // 更新音符总数的显示
  updateNoteCount() {
    this.noteCountLabel.string = "音符数量:" + this.noteArray.length;
  }

  update(deltaTime: number) {}
}