import * as fs from 'fs'
import * as path from 'path'
import * as readline from 'readline'

import { Server } from 'socket.io'

import Logger, { LoggerType } from '#application/logger'
import { getAppPath } from '#application/storage'

class CommandManager {
  private logger = Logger.type(LoggerType.COMMAND)
  private commands: Map<string, any> = new Map()
  private rl: readline.Interface
  private io: Server | null = null
  private rlClosed: boolean = false

  constructor() {
    this.rl = readline.createInterface({
      input: process.stdin,
      output: process.stdout
    })

    this.rl.on('close', () => {
      this.rlClosed = true
    })
  }

  public async boot(io: Server) {
    this.io = io
    await this.loadCommands()
    this.logger.info('Command manager loaded')
    this.startPrompt()
  }

  private startPrompt() {
    if (this.rlClosed) return

    this.rl.question('> ', (command: string) => {
      this.processCommand(command)
      this.startPrompt()
    })
  }

  private async processCommand(command: string): Promise<void> {
    const [cmd, ...args] = command.trim().split(' ')
    if (this.commands.has(cmd)) {
      const CommandClass = this.commands.get(cmd)
      const commandInstance = new CommandClass(this.io as Server)
      await commandInstance.execute(args)
    } else {
      this.handleUnknownCommand(cmd)
    }
  }

  private handleUnknownCommand(command: string) {
    switch (command) {
      case 'exit':
        this.rl.close()
        break
      default:
        console.error(`Unknown command: ${command}`)
        break
    }
  }

  private async loadCommands() {
    const directory = getAppPath('commands')
    this.logger.info(`Loading commands from: ${directory}`)

    try {
      const files = await fs.promises.readdir(directory, { withFileTypes: true })

      for (const file of files) {
        if (!file.isFile() || (!file.name.endsWith('.ts') && !file.name.endsWith('.js'))) {
          continue
        }

        const fullPath = getAppPath('commands', file.name)
        const commandName = path.basename(file.name, path.extname(file.name))

        try {
          const module = await import(fullPath)
          if (typeof module.default !== 'function') {
            this.logger.warn(`Unrecognized export in ${file.name}`)
            continue
          }

          this.registerCommand(commandName, module.default)
        } catch (error) {
          this.logger.error(`Error loading command ${file.name}: ${error instanceof Error ? error.message : String(error)}`)
        }
      }
    } catch (error) {
      this.logger.error(`Failed to read commands directory: ${error instanceof Error ? error.message : String(error)}`)
    }
  }

  private registerCommand(name: string, CommandClass: any) {
    if (this.commands.has(name)) {
      this.logger.warn(`Command '${name}' is already registered. Overwriting...`)
    }
    this.commands.set(name, CommandClass)
    this.logger.info(`Registered command: ${name}`)
  }
}

export default new CommandManager()