const { readdirSync, statSync } = require("fs")
const { join } = require("path")
const color = require("../functions/colorCodes")

/**
 * Recursively gets all command files from a directory
 * @param {string} dir - Directory to scan
 * @returns {string[]} Array of command file paths
 */
function getCommandFiles(dir) {
  const files = []
  const items = readdirSync(dir)
  
  for (const item of items) {
    const path = join(dir, item)
    const stat = statSync(path)
    
    if (stat.isDirectory()) {
      files.push(...getCommandFiles(path))
    } else if (item.endsWith('.js')) {
      files.push(path)
    }
  }
  
  return files
}

/**
 * Loads and registers all command files from the commands directory
 * @param {Object} client - The Discord client instance
 * @returns {Promise<void>}
 */
module.exports = async (client) => {
  try {
    const commandsPath = join(__dirname, "..", "commands")
    const commandFiles = getCommandFiles(commandsPath)
        
    let loadedCommands = 0
    let failedCommands = 0

    for (const file of commandFiles) {
      try {
        const command = require(file)
        
        // Validate command structure
        if (!command.config?.name) {
          console.error(color("%", `%r[Command_Handler]%7 :: Command in ${file} is missing required config.name property`))
          failedCommands++
          continue
        }

        console.log(color("%", `%b[Command_Handler]%7 :: Loading %e${command.config.name}%7 command`))

        // Register command and aliases
        client.commands.set(command.config.name, command)
        if (command.config.aliases?.length) {
          command.config.aliases.forEach(alias => client.aliases.set(alias, command.config.name))
        }
        
        loadedCommands++
      } catch (error) {
        console.error(color("%", `%r[Command_Handler]%7 :: Failed to load command ${file}: ${error.message}`))
        failedCommands++
      }
    }

    console.log(color("%", `%b[Command_Handler]%7 :: Successfully loaded %e${loadedCommands}%7 commands`))
    if (failedCommands > 0) {
      console.warn(color("%", `%y[Command_Handler]%7 :: Failed to load %r${failedCommands}%7 commands`))
    }
  } catch (error) {
    console.error(color("%", `%r[Command_Handler]%7 :: Critical error: ${error.message}`))
    throw error // Re-throw to handle at higher level
  }
}