import { Guild, GuildMember, PermissionFlagsBits } from 'discord.js';
import { prisma } from '../database';
import { logger } from '../utils/logger';
import { auditLogService } from './AuditLogService';

export class AutoRoleService {
  /**
   * 서버의 자동 역할 설정을 조회합니다.
   */
  async getConfig(guildId: string) {
    return prisma.autoRoleConfig.findUnique({
      where: { guildId },
    });
  }

  /**
   * 서버의 자동 역할 설정을 업데이트합니다.
   */
  async updateConfig(guildId: string, data: {
    userRoleIds?: string[];
    botRoleIds?: string[];
    isEnabled?: boolean;
    botEnabled?: boolean;
  }) {
    return prisma.autoRoleConfig.upsert({
      where: { guildId },
      create: {
        guildId,
        ...data,
      },
      update: data,
    });
  }

  /**
   * 자동 역할 부여 기능을 활성/비활성합니다.
   */
  async setEnabled(guildId: string, enabled: boolean) {
    return this.updateConfig(guildId, { isEnabled: enabled });
  }

  /**
   * 신규 멤버가 입장했을 때 자동으로 역할을 부여합니다.
   */
  async handleMemberJoin(member: GuildMember) {
    const config = await this.getConfig(member.guild.id);
    if (!config) return;

    const isBot = member.user.bot;
    const isEnabled = isBot ? config.botEnabled : config.isEnabled;
    const roleIds = isBot ? config.botRoleIds : config.userRoleIds;

    if (!isEnabled || roleIds.length === 0) return;

    try {
      await member.roles.add(roleIds, 'Kord Auto-Role');
      logger.info(`[AutoRole] Added roles to ${member.user.tag} in ${member.guild.name}`);
    } catch (error) {
      logger.error(`[AutoRole] Failed to add roles to ${member.user.tag} in ${member.guild.name}`, error);
      
      // 권한 문제인 경우 감사 로그에 기록
      await auditLogService.log(member.guild, {
        category: 'PERMISSION',
        severity: 'WARN',
        title: 'Auto-Role Failure',
        description: `Failed to assign roles to ${member.user.toString()} automatically. Please check the bot's permission and role hierarchy.`
      }).catch(() => {});
    }
  }
}

export const autoRoleService = new AutoRoleService();