import { Node, Prefab, SpriteFrame, clamp } from 'cc'
import Singleton from '../Base/Singleton'
import { EntityTypeEnum, IBullet, IClientInput, InputTypeEnum, IRoom, IState, toFixed } from '../Common'
import { ActorManager } from '../Entity/Actor/ActorManager'
import { BulletManager } from '../Entity/Bullet/BulletManager'
import { EventEnum } from '../Enum'
import { JoyStickManager } from '../UI/JoyStickManager'
import EventManager from './EventManager'


const PLAYER_SPEED = 100
const BULLET_SPEED = 600

const WEAPON_DAMAGE = 5

const PLAYER_RADIUS = 50
const BULLET_RADIUS = 10

const mapW = 960
const mapH = 640

export default class DataManager extends Singleton {
  static get Instance() {
    return super.GetInstance<DataManager>()
  }

  //登陆数据
  myPlayerId = 1

  //大厅数据
  roomInfo: IRoom

  //游戏数据
  stage: Node
  jm: JoyStickManager
  prefabMap: Map<string, Prefab> = new Map()
  textureMap: Map<string, SpriteFrame[]> = new Map()
  actorMap: Map<number, ActorManager> = new Map()
  bulletMap: Map<number, BulletManager> = new Map()

  reset() {
    this.stage = null
    this.jm = null
    this.actorMap.clear()
    this.bulletMap.clear()
    this.prefabMap.clear()
    this.textureMap.clear()
  }

  state: IState = {
    players: [{
      id: 2,
      nickname: "哈哈1",
      position: {
        x: -200,
        y: -200
      },
      direction: {
        x: 1,
        y: 0
      },
      hp: 100,
      type: EntityTypeEnum.Actor1,
      weaponType: EntityTypeEnum.Weapon1,
      bulletType: EntityTypeEnum.Bullet1,
    }, {
      id: 1,
      nickname: "哈哈2",
      position: {
        x: 200,
        y: 200
      },
      direction: {
        x: 0,
        y: -1
      },
      hp: 100,
      type: EntityTypeEnum.Actor2,
      weaponType: EntityTypeEnum.Weapon2,
      bulletType: EntityTypeEnum.Bullet2,
    }],
    bullets: [],
    nextBulletId: 1
  }

  applyInput(input: IClientInput) {
    switch (input.type) {
      case InputTypeEnum.ActorMove: {
        const { direction: { x, y }, dt, id } = input
        const player = this.state.players.find(e => e.id === id)
        if (!player) {
          return
        }

        player.position.x += toFixed(x * PLAYER_SPEED * dt)
        player.position.y += toFixed(y * PLAYER_SPEED * dt)

        player.position.x = clamp(player.position.x, -mapW / 2, mapW / 2)
        player.position.y = clamp(player.position.y, -mapH / 2, mapH / 2)

        player.direction = { x, y }
        break
      }
      case InputTypeEnum.WeaponShoot: {
        const { owner, position, direction } = input
        const bullet: IBullet = {
          id: this.state.nextBulletId++,
          owner,
          position,
          direction,
          type: this.actorMap.get(owner).bulletType
        }
        this.state.bullets.push(bullet)

        EventManager.Instance.emit(EventEnum.BulletBorn, owner)
        break
      }
      case InputTypeEnum.TimePast: {
        const { dt } = input
        const { bullets, players } = this.state

        for (let i = bullets.length - 1; i >= 0; i--) {
          const bullet = bullets[i];
          for (let j = players.length - 1; j >= 0; j--) {
            const player = players[j];
            if (((player.position.x - bullet.position.x) ** 2 + (player.position.y - bullet.position.y) ** 2) < (PLAYER_RADIUS + BULLET_RADIUS) ** 2) {
              EventManager.Instance.emit(EventEnum.ExplosionBorn, bullet.id, {
                x: toFixed((player.position.x + bullet.position.x) / 2),
                y: toFixed((player.position.y + bullet.position.y) / 2),
              })

              player.hp -= WEAPON_DAMAGE
              bullets.splice(i, 1)
              break
            }
          }
          if (Math.abs(bullet.position.x) > mapW / 2 || Math.abs(bullet.position.y) > mapH / 2) {
            EventManager.Instance.emit(EventEnum.ExplosionBorn, bullet.id, {
              x: bullet.position.x,
              y: bullet.position.y,
            })
            bullets.splice(i, 1)
          }
        }

        for (const bullet of this.state.bullets) {
          bullet.position.x += toFixed(bullet.direction.x * BULLET_SPEED * dt)
          bullet.position.y += toFixed(bullet.direction.y * BULLET_SPEED * dt)
        }
      }
    }
  }
}