/**
 * Purge Command
 * Delete multiple messages at once
 */

import {
  SlashCommandBuilder,
  EmbedBuilder,
  PermissionFlagsBits,
  type ChatInputCommandInteraction,
  type TextChannel,
} from 'discord.js';
import type { Command } from '../../types/index.ts';
import { PermissionLevel } from '../../types/index.ts';
import type { EllyClient } from '../../client/EllyClient.ts';

export const purgeCommand: Command = {
  data: new SlashCommandBuilder()
    .setName('purge')
    .setDescription('Delete multiple messages at once')
    .addIntegerOption((option) =>
      option
        .setName('amount')
        .setDescription('Number of messages to delete (1-100)')
        .setRequired(true)
        .setMinValue(1)
        .setMaxValue(100)
    )
    .addUserOption((option) =>
      option
        .setName('user')
        .setDescription('Only delete messages from this user')
        .setRequired(false)
    )
    .addStringOption((option) =>
      option
        .setName('contains')
        .setDescription('Only delete messages containing this text')
        .setRequired(false)
    )
    .setDefaultMemberPermissions(PermissionFlagsBits.ManageMessages),

  permission: PermissionLevel.Officer,
  cooldown: 5,
  guildOnly: true,

  async execute(interaction: ChatInputCommandInteraction): Promise<void> {
    const client = interaction.client as EllyClient;

    if (!interaction.guild || !interaction.channel) {
      await interaction.reply({
        content: 'This command can only be used in a server.',
        ephemeral: true,
      });
      return;
    }

    const channel = interaction.channel as TextChannel;
    const amount = interaction.options.getInteger('amount', true);
    const targetUser = interaction.options.getUser('user');
    const containsText = interaction.options.getString('contains');

    // Check bot permissions
    const botMember = interaction.guild.members.me;
    if (!botMember?.permissions.has(PermissionFlagsBits.ManageMessages)) {
      await interaction.reply({
        embeds: [
          new EmbedBuilder()
            .setColor(client.config.colors.error)
            .setTitle('❌ Missing Permissions')
            .setDescription('I need the **Manage Messages** permission to delete messages.'),
        ],
        ephemeral: true,
      });
      return;
    }

    // Defer reply since this might take a moment
    await interaction.deferReply({ ephemeral: true });

    try {
      // Fetch messages
      const messages = await channel.messages.fetch({ limit: 100 });

      // Filter messages
      let filtered = messages.filter((msg) => {
        // Can't delete messages older than 14 days
        const twoWeeksAgo = Date.now() - 14 * 24 * 60 * 60 * 1000;
        if (msg.createdTimestamp < twoWeeksAgo) return false;

        // Filter by user if specified
        if (targetUser && msg.author.id !== targetUser.id) return false;

        // Filter by content if specified
        if (containsText && !msg.content.toLowerCase().includes(containsText.toLowerCase())) {
          return false;
        }

        return true;
      });

      // Limit to requested amount
      filtered = filtered.first(amount);

      if (filtered.length === 0) {
        await interaction.editReply({
          embeds: [
            new EmbedBuilder()
              .setColor(client.config.colors.warning)
              .setTitle('⚠️ No Messages Found')
              .setDescription(
                'No messages matching your criteria were found.\n\n' +
                '**Note:** Messages older than 14 days cannot be bulk deleted.'
              ),
          ],
        });
        return;
      }

      // Delete messages
      const deleted = await channel.bulkDelete(filtered, true);

      // Build result embed
      const embed = new EmbedBuilder()
        .setColor(client.config.colors.success)
        .setTitle('🗑️ Messages Purged')
        .setDescription(`Successfully deleted **${deleted.size}** message${deleted.size !== 1 ? 's' : ''}.`)
        .addFields(
          { name: 'Channel', value: `${channel}`, inline: true },
          { name: 'Requested', value: String(amount), inline: true },
          { name: 'Deleted', value: String(deleted.size), inline: true }
        )
        .setFooter({
          text: `Purged by ${interaction.user.tag}`,
          iconURL: interaction.user.displayAvatarURL(),
        })
        .setTimestamp();

      if (targetUser) {
        embed.addFields({ name: 'User Filter', value: `${targetUser}`, inline: true });
      }

      if (containsText) {
        embed.addFields({ name: 'Content Filter', value: `"${containsText}"`, inline: true });
      }

      await interaction.editReply({ embeds: [embed] });

      // Log to development channel if configured
      if (client.channels_cache.developmentLogs) {
        const logEmbed = new EmbedBuilder()
          .setColor(client.config.colors.warning)
          .setTitle('📋 Purge Log')
          .addFields(
            { name: 'Moderator', value: `${interaction.user} (${interaction.user.id})`, inline: true },
            { name: 'Channel', value: `${channel} (${channel.id})`, inline: true },
            { name: 'Messages Deleted', value: String(deleted.size), inline: true }
          )
          .setTimestamp();

        if (targetUser) {
          logEmbed.addFields({ name: 'Target User', value: `${targetUser} (${targetUser.id})`, inline: true });
        }

        await client.channels_cache.developmentLogs.send({ embeds: [logEmbed] });
      }
    } catch (error) {
      client.logger.error('Error purging messages', error);

      await interaction.editReply({
        embeds: [
          new EmbedBuilder()
            .setColor(client.config.colors.error)
            .setTitle('❌ Error')
            .setDescription('An error occurred while trying to delete messages.'),
        ],
      });
    }
  },
};