import { config } from "../constants/config"
import { DataStage } from "../types/global"
import { DOStage } from "./DOStage"


export class StorageManager {

  private static instance: StorageManager
  public static getInstance(): StorageManager {
    if (!StorageManager.instance) {
      StorageManager.instance = new StorageManager()
    }
    return StorageManager.instance
  }

  private changed = false

  private stageID: string = "";
  private stageMap: Map<string, DataStage> = new Map();

  public init(): void {
    this.changed = false
  }

  public loadStage(stageID: string): DOStage {
    this.stageID = stageID
    var dataStage: DataStage
    if (this.stageMap.has(stageID)) {
        dataStage = this.stageMap.get(stageID)
    }
    else {
        var jsonStr = Laya.LocalStorage.getItem(stageID)
        if (jsonStr) {
            dataStage = JSON.parse(jsonStr)
            this.stageMap.set(stageID, dataStage)
        }
        else {
            dataStage = {mistake: 0, difficulty: config.DIFFICULTY_TYPE.Easy, duration: 0, note_open: false, blocks: new Array(), candys: new Array()}
            this.stageMap.set(stageID, dataStage)
        }
    }
    var levelStr = "aBCeIGFhdEDFcAHBGIhigBdfecAgHDiFBCaeBEAGHCIdffcIdEAHbgcABfGEdiHIFHaCDGEBDGEHbiaFC"
    return new DOStage(dataStage, levelStr)
  }

  public cleanStage(): void {
    if (this.stageID && this.stageID.length > 0) {
      if (this.stageMap.has(this.stageID)) {
        this.stageMap.delete(this.stageID)
      }
      Laya.LocalStorage.removeItem(this.stageID)
      this.stageID = ""
    }
  }

  public saveStage(): void {
    if (this.changed) {
      this.changed = false
      if (this.stageMap.has(this.stageID)) {
          var dataStage = this.stageMap.get(this.stageID)
          var jsonStr = JSON.stringify(dataStage)
          Laya.LocalStorage.setItem(this.stageID, jsonStr)
      }
    }
  }

  public onChanged(): void {
    this.changed = true
  }
}