import {
  EmbedBuilder,
  ActionRowBuilder,
  ButtonBuilder,
  ButtonStyle,
  StringSelectMenuBuilder,
  ChannelSelectMenuBuilder,
  ChannelType,
  MessageComponentInteraction,
  ChatInputCommandInteraction,
  Colors,
} from 'discord.js';
import { SupportedLocale, t } from '../i18n';
import { PermissionAuditService } from './PermissionAuditService';
import { prisma } from '../database';

export class SetupWizardRenderer {
  static async renderStep(
    step: number,
    interaction: MessageComponentInteraction | ChatInputCommandInteraction,
    locale: SupportedLocale
  ): Promise<{ embed: EmbedBuilder; components: ActionRowBuilder<any>[] }> {
    const embed = new EmbedBuilder().setColor(Colors.Blurple);
    const components: ActionRowBuilder<any>[] = [];

    switch (step) {
      case 0: {
        embed.setTitle(t(locale, 'commands.setup.step0.title'))
          .setDescription(t(locale, 'commands.setup.step0.desc'));

        const row = new ActionRowBuilder<ButtonBuilder>().addComponents(
          new ButtonBuilder()
            .setCustomId('setup_next_1')
            .setLabel(t(locale, 'commands.setup.step0.startBtn'))
            .setStyle(ButtonStyle.Primary)
        );
        components.push(row);
        break;
      }
      
      case 1: {
        embed.setTitle(t(locale, 'commands.setup.step1.title'))
          .setDescription(t(locale, 'commands.setup.step1.desc', { locale: locale === 'ko' ? 'Korean' : 'English' }));

        const select = new StringSelectMenuBuilder()
          .setCustomId('setup_lang_select')
          .setPlaceholder(t(locale, 'commands.setup.step1.placeholder'))
          .addOptions([
            { label: 'Korean', value: 'ko', description: '한국어로 봇을 설정합니다.' },
            { label: 'English', value: 'en', description: 'Set bot to English.' }
          ]);

        const btnRow = new ActionRowBuilder<ButtonBuilder>().addComponents(
          new ButtonBuilder()
            .setCustomId('setup_next_2')
            .setLabel(t(locale, 'commands.setup.step1.nextBtn'))
            .setStyle(ButtonStyle.Secondary)
        );

        components.push(new ActionRowBuilder<StringSelectMenuBuilder>().addComponents(select));
        components.push(btnRow);
        break;
      }

      case 2: {
        if (!interaction.guild) throw new Error('Guild not found');
        const results = await PermissionAuditService.auditGuild(interaction.guild);
        const hasFails = results.some(r => r.status === 'FAIL');
        
        embed.setTitle(t(locale, 'commands.setup.step2.title'));
        if (hasFails) {
          embed.setDescription(t(locale, 'commands.setup.step2.descFail'))
               .setColor(Colors.Red);
          // ⚠️ 권한 부족 목록 렌더링
          const failLines = results
            .filter(r => r.status === 'FAIL')
            .map(r => `- **${t(locale, `commands.permissionAudit.features.${r.featureKey as any}`) || r.featureKey}**\n  > \`${r.missingPermissions.join('`, `')}\``);
          if (failLines.length > 0) {
            embed.addFields({ name: 'Missing Permissions', value: failLines.join('\n') });
          }
        } else {
          embed.setDescription(t(locale, 'commands.setup.step2.descOk'))
               .setColor(Colors.Green);
        }

        const btnRow = new ActionRowBuilder<ButtonBuilder>().addComponents(
          new ButtonBuilder()
            .setCustomId('setup_refresh_2')
            .setLabel(t(locale, 'commands.setup.step2.recheckBtn'))
            .setStyle(ButtonStyle.Secondary),
          new ButtonBuilder()
            .setCustomId('setup_next_3')
            .setLabel(t(locale, 'commands.setup.step2.nextBtn'))
            .setStyle(hasFails ? ButtonStyle.Danger : ButtonStyle.Primary)
        );

        components.push(btnRow);
        break;
      }

      case 3: {
        embed.setTitle(t(locale, 'commands.setup.step3.title'))
          .setDescription(t(locale, 'commands.setup.step3.desc'));

        const select = new ChannelSelectMenuBuilder()
          .setCustomId('setup_audit_select')
          .setPlaceholder(t(locale, 'commands.setup.step3.placeholder'))
          .setChannelTypes(ChannelType.GuildText);

        const btnRow = new ActionRowBuilder<ButtonBuilder>().addComponents(
          new ButtonBuilder()
            .setCustomId('setup_audit_disable')
            .setLabel(t(locale, 'commands.setup.step3.disableBtn'))
            .setStyle(ButtonStyle.Danger),
          new ButtonBuilder()
            .setCustomId('setup_next_4')
            .setLabel(t(locale, 'commands.setup.step3.nextBtn'))
            .setStyle(ButtonStyle.Secondary)
        );

        components.push(new ActionRowBuilder<ChannelSelectMenuBuilder>().addComponents(select));
        components.push(btnRow);
        break;
      }

      case 4: {
        const audit = await prisma.auditChannel.findUnique({ where: { guildId: interaction.guildId! } });
        const disabled = audit?.disabledCategories || [];
        
        embed.setTitle(t(locale, 'commands.setup.step4.title'))
          .setDescription(t(locale, 'commands.setup.step4.desc'));

        const categories: ('SYSTEM' | 'VOICE' | 'PERMISSION' | 'INVITE')[] = ['SYSTEM', 'VOICE', 'PERMISSION', 'INVITE'];
        const row1 = new ActionRowBuilder<ButtonBuilder>();
        
        categories.forEach(cat => {
          const isEnabled = !disabled.includes(cat);
          row1.addComponents(
            new ButtonBuilder()
              .setCustomId(`setup_audit_toggle_${cat}`)
              .setLabel(t(locale, `commands.setup.auditCategories.${cat}`))
              .setStyle(isEnabled ? ButtonStyle.Success : ButtonStyle.Danger)
          );
        });

        const row2 = new ActionRowBuilder<ButtonBuilder>().addComponents(
          new ButtonBuilder()
            .setCustomId('setup_next_5')
            .setLabel(t(locale, 'commands.setup.step4.nextBtn'))
            .setStyle(ButtonStyle.Primary)
        );

        components.push(row1, row2);
        break;
      }

      case 5: {
        embed.setTitle(t(locale, 'commands.setup.step5.title'))
          .setDescription(t(locale, 'commands.setup.step5.desc'));

        const select = new ChannelSelectMenuBuilder()
          .setCustomId('setup_voice_select')
          .setPlaceholder(t(locale, 'commands.setup.step5.placeholder'))
          .setChannelTypes(ChannelType.GuildVoice);

        const btnRow = new ActionRowBuilder<ButtonBuilder>().addComponents(
          new ButtonBuilder()
            .setCustomId('setup_voice_auto')
            .setLabel(t(locale, 'commands.setup.step5.autoBtn'))
            .setStyle(ButtonStyle.Success),
          new ButtonBuilder()
            .setCustomId('setup_voice_disable')
            .setLabel(t(locale, 'commands.setup.step5.skipBtn'))
            .setStyle(ButtonStyle.Danger),
          new ButtonBuilder()
            .setCustomId('setup_next_6')
            .setLabel(t(locale, 'commands.setup.step5.nextBtn'))
            .setStyle(ButtonStyle.Secondary)
        );

        components.push(new ActionRowBuilder<ChannelSelectMenuBuilder>().addComponents(select));
        components.push(btnRow);
        break;
      }

      case 6: {
        if (!interaction.guild) throw new Error('Guild not found');
        
        const config = await prisma.guildConfig.findUnique({ where: { guildId: interaction.guild.id } });
        const audit = await prisma.auditChannel.findUnique({ where: { guildId: interaction.guild.id } });
        const voice = await prisma.voiceGenerator.findFirst({ where: { guildId: interaction.guild.id } });
        
        embed.setTitle(t(locale, 'commands.setup.step6.title'))
             .setColor(Colors.Green);
             
        const langStr = config?.locale === 'ko' ? 'Korean' : 'English';
        const auditStr = audit?.channelId ? `<#${audit.channelId}>` : 'Disabled';
        const voiceStr = voice?.channelId ? `<#${voice.channelId}>` : 'Disabled';
        
        // 감사 로그 카테고리 요약
        let catStr = 'None';
        if (audit?.channelId) {
          const allCats: ('SYSTEM' | 'VOICE' | 'PERMISSION' | 'INVITE')[] = ['SYSTEM', 'VOICE', 'PERMISSION', 'INVITE'];
          const enabled = allCats.filter(c => !audit.disabledCategories.includes(c));
          catStr = enabled.map(c => t(locale, `commands.setup.auditCategories.${c}`)).join(', ');
        }
        
        embed.setDescription(t(locale, 'commands.setup.step6.desc', { 
          lang: langStr, 
          audit: auditStr, 
          categories: catStr,
          voice: voiceStr 
        }));

        const btnRow = new ActionRowBuilder<ButtonBuilder>().addComponents(
          new ButtonBuilder()
            .setCustomId('setup_finish')
            .setLabel(t(locale, 'commands.setup.step6.finishBtn'))
            .setStyle(ButtonStyle.Success)
        );

        components.push(btnRow);
        break;
      }
    }

    return { embed, components };
  }
}