import { 
  SlashCommandBuilder, 
  ChatInputCommandInteraction, 
  PermissionFlagsBits, 
  EmbedBuilder, 
  Colors, 
  RoleSelectMenuBuilder,
  ActionRowBuilder
} from 'discord.js';
import { Command, CommandTrait } from '../core/command';
import { prisma } from '../database';
import { t, SupportedLocale } from '../i18n';
import { InviteService } from '../services/InviteService';
import { auditLogService } from '../services/AuditLogService';

class InviteCommand extends Command {
  protected override readonly trait = CommandTrait.General;
  protected override guildOnly = true;

  protected override define() {
    return new SlashCommandBuilder()
      .setName('invite')
      .setDescription('Manage roles mapped to invite codes.')
      .setDescriptionLocalizations({
        ko: '초대 코드와 역할을 연동하여 관리합니다.',
      })
      .setDefaultMemberPermissions(PermissionFlagsBits.Administrator)
      .addSubcommand(subcommand =>
        subcommand
          .setName('list')
          .setDescription('List all invite codes in the server.')
          .setDescriptionLocalizations({ ko: '서버의 초대 코드 목록을 조회합니다.' })
          .addStringOption(option =>
            option.setName('filter')
              .setDescription('Lookup filter')
              .addChoices(
                { name: 'all', value: 'all' },
                { name: 'managed', value: 'managed' }
              )
          )
      )
      .addSubcommand(subcommand =>
        subcommand
          .setName('link')
          .setDescription('Link a role to an existing invite code.')
          .setDescriptionLocalizations({ ko: '기존 초대 코드에 역할을 연동합니다.' })
          .addStringOption(option =>
            option.setName('code')
              .setDescription('Invite code string')
              .setRequired(true)
          )
          .addRoleOption(option =>
            option.setName('role')
              .setDescription('Role to assign')
              .setRequired(true)
          )
      )
      .addSubcommand(subcommand =>
        subcommand
          .setName('create')
          .setDescription('Create a new invite code with a mapped role.')
          .setDescriptionLocalizations({ ko: '역할이 연동된 새로운 초대 코드를 생성합니다.' })
          .addRoleOption(option =>
            option.setName('role')
              .setDescription('Role to assign')
              .setRequired(true)
          )
          .addIntegerOption(option =>
            option.setName('max_uses')
              .setDescription('Maximum uses')
          )
          .addIntegerOption(option =>
            option.setName('max_age')
              .setDescription('Expiration (seconds)')
          )
      )
      .addSubcommand(subcommand =>
        subcommand
          .setName('unlink')
          .setDescription('Unlink a role from an invite code.')
          .setDescriptionLocalizations({ ko: '초대 코드에 연동된 역할을 해제합니다.' })
          .addStringOption(option =>
            option.setName('code')
              .setDescription('Invite code string')
              .setRequired(true)
          )
      );
  }

  protected override async handle(interaction: ChatInputCommandInteraction, locale: SupportedLocale) {
    const subcommand = interaction.options.getSubcommand();
    const guild = interaction.guild!;

    if (subcommand === 'list') {
      const filter = interaction.options.getString('filter') || 'managed';
      const mappings = await prisma.inviteRole.findMany({ where: { guildId: guild.id } });
      
      let displayInvites: any[] = [];
      if (filter === 'all') {
        const invites = await guild.invites.fetch();
        displayInvites = invites.map(inv => ({
          code: inv.code,
          roleId: mappings.find(m => m.inviteCode === inv.code)?.roleId,
          uses: inv.uses,
          maxUses: inv.maxUses,
        }));
      } else {
        displayInvites = mappings.map(m => ({
          code: m.inviteCode,
          roleId: m.roleId,
        }));
      }

      if (displayInvites.length === 0) {
        await interaction.reply({ content: t(locale, 'commands.invite.listEmpty'), ephemeral: true });
        return;
      }

      const embed = new EmbedBuilder()
        .setTitle(t(locale, 'commands.invite.listTitle'))
        .setColor(Colors.Blue)
        .setDescription(displayInvites.map(inv => `\`${inv.code}\`: ${inv.roleId ? `<@&${inv.roleId}>` : t(locale, 'autorole.notSet')}`).join('\n'));

      await interaction.reply({ embeds: [embed], ephemeral: true });
      return;
    }

    if (subcommand === 'link') {
      const code = interaction.options.getString('code', true);
      const role = interaction.options.getRole('role', true);

      await prisma.inviteRole.upsert({
        where: {
          guildId_inviteCode: {
            guildId: guild.id,
            inviteCode: code,
          },
        },
        update: { roleId: role.id },
        create: {
          guildId: guild.id,
          inviteCode: code,
          roleId: role.id,
        },
      });

      await InviteService.cacheGuildInvites(guild);
      await interaction.reply({ content: t(locale, 'commands.invite.linkSuccess', { code, role: role.name }), ephemeral: true });
      return;
    }

    if (subcommand === 'create') {
      const role = interaction.options.getRole('role', true);
      const maxUses = interaction.options.getInteger('max_uses') || 0;
      const maxAge = interaction.options.getInteger('max_age') || 0;

      const invite = await guild.invites.create(interaction.channelId, {
        maxUses,
        maxAge,
        unique: true,
      });

      await prisma.inviteRole.create({
        data: {
          guildId: guild.id,
          inviteCode: invite.code,
          roleId: role.id,
        },
      });

      await InviteService.cacheGuildInvites(guild);
      await interaction.reply({ content: t(locale, 'commands.invite.createSuccess', { code: invite.code, role: role.name }), ephemeral: true });
      return;
    }

    if (subcommand === 'unlink') {
      const code = interaction.options.getString('code', true);
      await prisma.inviteRole.deleteMany({
        where: {
          guildId: guild.id,
          inviteCode: code,
        },
      });

      await InviteService.cacheGuildInvites(guild);
      await interaction.reply({ content: t(locale, 'commands.invite.unlinkSuccess', { code }), ephemeral: true });
      return;
    }
  }
}

export default new InviteCommand().toModule();