server/src/managers/weatherManager.ts

import { Server } from 'socket.io'

import Logger, { LoggerType } from '#application/logger'
import { World } from '#entities/world'
import SocketManager from '#managers/socketManager'
import WorldRepository from '#repositories/worldRepository'

type WeatherState = {
  rainPercentage: number
  fogDensity: number
}

class WeatherManager {
  private static readonly CONFIG = {
    UPDATE_INTERVAL_MS: 60_000, // Check weather every minute
    RAIN_CHANCE: 0.2, // 20% chance
    FOG_CHANCE: 0.15, // 15% chance
    RAIN_PERCENTAGE_RANGE: { min: 50, max: 100 },
    FOG_DENSITY_RANGE: { min: 30, max: 100 }
  } as const

  private readonly logger = Logger.type(LoggerType.APP)
  private io: Server | null = null
  private intervalId: NodeJS.Timeout | null = null

  private weatherState: WeatherState = {
    rainPercentage: 0,
    fogDensity: 0
  }

  public async boot(): Promise<void> {
    this.io = SocketManager.getIO()
    await this.loadWeather()
    this.startWeatherLoop()
    this.logger.info('Weather manager loaded')
  }

  public getWeatherState(): WeatherState {
    return { ...this.weatherState }
  }

  public randomWeatherValue(type: 'rain' | 'fog' ) {
    switch (type) {
      case 'rain':
        return this.getRandomNumber(WeatherManager.CONFIG.RAIN_PERCENTAGE_RANGE.min, WeatherManager.CONFIG.RAIN_PERCENTAGE_RANGE.max)
      case 'fog':
        return this.getRandomNumber(WeatherManager.CONFIG.FOG_DENSITY_RANGE.min, WeatherManager.CONFIG.FOG_DENSITY_RANGE.max)
    }
  }

  public async setRainValue(value? : number): Promise<void> {
    if (value === undefined) {
      value = this.weatherState.fogDensity > 0 ? 0 : this.randomWeatherValue('fog')
    }

    this.updateWeatherProperty('rain', value)
    await this.saveAndEmitWeather()
  }

  public async setFogValue(value? : number): Promise<void> {
    if (value === undefined) {
      value = this.weatherState.fogDensity > 0 ? 0 : this.randomWeatherValue('fog')
    }

    this.updateWeatherProperty('fog', value)
    await this.saveAndEmitWeather()
  }

  public cleanup(): void {
    this.intervalId && clearInterval(this.intervalId)
  }

  private async loadWeather(): Promise<void> {
    try {
      const worldRepository = new WorldRepository()
      const world = await worldRepository.getFirst()
      if (world) {
        this.weatherState = {
          rainPercentage: world.rainPercentage,
          fogDensity: world.fogDensity
        }
      }
    } catch (error) {
      this.logError('load', error)
    }
  }

  private startWeatherLoop(): void {
    this.intervalId = setInterval(async () => {
      this.updateRandomWeather()
      await this.saveAndEmitWeather()
    }, WeatherManager.CONFIG.UPDATE_INTERVAL_MS)
  }

  private updateRandomWeather(): void {
    if (Math.random() < WeatherManager.CONFIG.RAIN_CHANCE) {
      this.updateWeatherProperty('rain', this.randomWeatherValue('rain') )
    }
    if (Math.random() < WeatherManager.CONFIG.FOG_CHANCE) {
      this.updateWeatherProperty('fog', this.randomWeatherValue('fog'))
    }
  }

  private updateWeatherProperty(type: 'rain' | 'fog', value: number): void {
    if (type === 'rain') {
        this.weatherState.rainPercentage = value
    }

    if (type === 'fog') {
        this.weatherState.fogDensity = value
    }
  }

  private async saveAndEmitWeather(): Promise<void> {
    await this.saveWeather()
    this.emitWeather()
  }

  private emitWeather(): void {
    this.io?.emit('weather', this.weatherState)
  }

  private async saveWeather(): Promise<void> {
    try {
      const worldRepository = new WorldRepository()

      let world = await worldRepository.getFirst()
      if (!world) world = new World()

      //left them in here because the
      await world
        .setRainPercentage(this.weatherState.rainPercentage)
        .setIsRainEnabled(this.weatherState.rainPercentage > 0)
        .setFogDensity(this.weatherState.fogDensity)
        .setIsFogEnabled(this.weatherState.fogDensity > 0)
        .save()
    } catch (error) {
      this.logError('save', error)
    }
  }

  private getRandomNumber(min: number, max: number): number {
    return Math.floor(Math.random() * (max - min + 1)) + min
  }

  private logError(operation: string, error: unknown): void {
    this.logger.error(`Failed to ${operation} weather: ${error instanceof Error ? error.message : String(error)}`)
  }
}

export default new WeatherManager()