const { EmbedBuilder } = require('discord.js');

module.exports = {
  name: 'guildMemberUpdate',
  async execute(oldMember, newMember, client) {
    try {
      const addedRoles = newMember.roles.cache.filter(role => !oldMember.roles.cache.has(role.id));
      const removedRoles = oldMember.roles.cache.filter(role => !newMember.roles.cache.has(role.id));
      
      if (addedRoles.size === 0 && removedRoles.size === 0) return;
      
      const REALM_GUILDS = client.REALM_GUILDS;
      const realmGuildIds = Object.values(REALM_GUILDS).filter(Boolean);
      
      if (!realmGuildIds.includes(newMember.guild.id)) return;
      
      const federationMappings = client.federationMappings;
      
      for (const [roleId, role] of addedRoles) {
        const mapping = federationMappings.get(roleId);
        if (!mapping) continue;
        
        console.log(`[Federation] Syncing role ${role.name} for ${newMember.user.tag} across realms`);
        
        for (const targetGuildId of realmGuildIds) {
          if (targetGuildId === newMember.guild.id) continue;
          
          try {
            const targetGuild = client.guilds.cache.get(targetGuildId);
            if (!targetGuild) continue;
            
            const targetMember = await targetGuild.members.fetch(newMember.user.id).catch(() => null);
            if (!targetMember) continue;
            
            const targetRole = targetGuild.roles.cache.find(r => r.name === role.name);
            if (!targetRole) continue;
            
            if (!targetMember.roles.cache.has(targetRole.id)) {
              await targetMember.roles.add(targetRole, '[Federation] Cross-server sync');
              console.log(`[Federation] Added ${role.name} to ${newMember.user.tag} in ${targetGuild.name}`);
            }
          } catch (err) {
            console.error(`[Federation] Sync error for guild ${targetGuildId}:`, err.message);
          }
        }
      }
      
      for (const [roleId, role] of removedRoles) {
        const mapping = federationMappings.get(roleId);
        if (!mapping) continue;
        
        console.log(`[Federation] Removing synced role ${role.name} for ${newMember.user.tag} across realms`);
        
        for (const targetGuildId of realmGuildIds) {
          if (targetGuildId === newMember.guild.id) continue;
          
          try {
            const targetGuild = client.guilds.cache.get(targetGuildId);
            if (!targetGuild) continue;
            
            const targetMember = await targetGuild.members.fetch(newMember.user.id).catch(() => null);
            if (!targetMember) continue;
            
            const targetRole = targetGuild.roles.cache.find(r => r.name === role.name);
            if (!targetRole) continue;
            
            if (targetMember.roles.cache.has(targetRole.id)) {
              await targetMember.roles.remove(targetRole, '[Federation] Cross-server sync');
              console.log(`[Federation] Removed ${role.name} from ${newMember.user.tag} in ${targetGuild.name}`);
            }
          } catch (err) {
            console.error(`[Federation] Sync error for guild ${targetGuildId}:`, err.message);
          }
        }
      }
    } catch (error) {
      console.error('[Federation] guildMemberUpdate error:', error);
    }
  },
};