/**
 * Right-click "Apps" menu commands:
 *   - "Create Ticket From Message" — turn a Discord message into a ticket.
 *   - "View User Tickets" — show last 10 tickets for the targeted user.
 */
const {
  ChannelType,
  EmbedBuilder,
  MessageFlags,
  PermissionFlagsBits
} = require('discord.js');
const { mongoose } = require('../../db-connection');
const { CONFIG } = require('../../config');
const { getPriorityEmoji } = require('../../utils');
const { checkTicketCreationRateLimit, getOrCreateTicketCategory } = require('../../services/tickets');
const { getTicketActionRow } = require('../../utils/ticketComponents');
const { enqueueSend } = require('../../services/channelQueue');
const { logError } = require('../../services/debugLog');

const Ticket = mongoose.model('Ticket');

async function handleCreateTicketFromMessage(interaction) {
  await interaction.deferReply({ flags: MessageFlags.Ephemeral });

  const rateLimit = checkTicketCreationRateLimit(interaction.user.id);
  if (!rateLimit.allowed) {
    const mins = Math.ceil((rateLimit.retryAfterMs || 0) / 60000);
    return interaction.editReply(`You can only create ${CONFIG.RATE_LIMIT_TICKETS_PER_USER} ticket(s) per ${CONFIG.RATE_LIMIT_WINDOW_MINUTES} minutes. Try again in ${mins} minute(s).`);
  }

  try {
    const message = interaction.targetMessage;
    const subject = `Message from ${message.author.tag}`;
    const description = message.content || 'No content';

    const guild = interaction.guild;
    const lastTicket = await Ticket.findOne().sort({ ticketNumber: -1 }).select('ticketNumber').lean();
    const ticketNumber = (lastTicket?.ticketNumber || 0) + 1;

    let parentCategoryIdForTicket;
    try {
      parentCategoryIdForTicket = await getOrCreateTicketCategory(
        guild,
        CONFIG.DISCORD_TICKET_CATEGORY_ID,
        CONFIG.TICKET_CATEGORY_NAME
      );
    } catch (err) {
      console.error('getOrCreateTicketCategory (context menu ticket):', err);
      return interaction.editReply('❌ Discord ticket category could not be resolved. Contact an administrator.');
    }

    let channel;
    try {
      channel = await guild.channels.create({
        name: `ticket-${ticketNumber}`,
        type: ChannelType.GuildText,
        parent: parentCategoryIdForTicket,
        permissionOverwrites: [
          { id: guild.id, deny: [PermissionFlagsBits.ViewChannel] },
          {
            id: message.author.id,
            allow: [PermissionFlagsBits.ViewChannel, PermissionFlagsBits.SendMessages, PermissionFlagsBits.ReadMessageHistory]
          },
          {
            id: CONFIG.ROLE_ID_TO_PING,
            allow: [PermissionFlagsBits.ViewChannel, PermissionFlagsBits.SendMessages, PermissionFlagsBits.ReadMessageHistory]
          }
        ]
      });
    } catch (err) {
      console.error('guild.channels.create (context menu ticket):', err);
      return interaction.editReply('❌ Failed to create ticket channel. Contact an administrator.');
    }

    const gmailThreadId = `discord-msg-${Date.now()}-${message.id}`;
    const now = new Date();
    await Ticket.create({
      gmailThreadId,
      discordThreadId: channel.id,
      senderEmail: message.author.tag,
      subject,
      createdAt: now,
      status: 'open',
      ticketNumber,
      priority: 'normal',
      lastActivity: now,
      creatorId: message.author.id,
      parentCategoryId: parentCategoryIdForTicket
    });

    const welcomeEmbed = new EmbedBuilder()
      .setDescription(CONFIG.TICKET_WELCOME_MESSAGE)
      .setColor(CONFIG.EMBED_COLOR_INFO);

    const infoEmbed = new EmbedBuilder()
      .setColor(CONFIG.EMBED_COLOR_INFO)
      .addFields(
        { name: 'From message', value: `[Jump to message](${message.url})` },
        { name: 'Creator', value: message.author.toString(), inline: true },
        { name: 'Created by Staff', value: interaction.user.toString(), inline: true },
        { name: 'Content', value: description.slice(0, 1000) || 'No content', inline: false }
      );

    const row = getTicketActionRow({ escalationTier: 0 });

    try {
      const welcomeMsg = await enqueueSend(channel, {
        content: `<@&${CONFIG.ROLE_ID_TO_PING}>\nHey There ${message.author} 🥦`,
        embeds: [welcomeEmbed, infoEmbed],
        components: [row]
      });

      await Ticket.updateOne(
        { discordThreadId: channel.id },
        { $set: { welcomeMessageId: welcomeMsg.id } }
      );
    } catch (err) {
      console.error('welcomeMessageId-save', err);
    }

    await interaction.editReply(`✅ Ticket created: ${channel}`);
  } catch (err) {
    logError('create-ticket-from-message', err, interaction).catch(() => {});
    await interaction.editReply('❌ Failed to create ticket from message.');
  }
}

async function handleViewUserTickets(interaction) {
  await interaction.deferReply({ flags: MessageFlags.Ephemeral });

  try {
    const targetUser = interaction.targetUser;
    const tickets = await Ticket.find({ senderEmail: targetUser.tag })
      .sort({ createdAt: -1 })
      .limit(10)
      .lean();

    if (!tickets || tickets.length === 0) {
      return interaction.editReply(`📋 No tickets found for ${targetUser.tag}`);
    }

    const embed = new EmbedBuilder()
      .setTitle(`📋 Tickets for ${targetUser.tag}`)
      .setDescription(`Found ${tickets.length} ticket(s)`)
      .setColor(CONFIG.EMBED_COLOR_INFO);

    for (const ticket of tickets.slice(0, 5)) {
      const priorityEmoji = getPriorityEmoji(ticket.priority || 'normal');
      const statusEmoji = ticket.status === 'open' ? '🟢' : '🔴';
      embed.addFields({
        name: `${priorityEmoji} Ticket #${ticket.ticketNumber} ${statusEmoji}`,
        value: `**Subject:** ${ticket.subject || 'No subject'}\n**Status:** ${ticket.status}\n**Claimed:** ${ticket.claimedBy || 'Unclaimed'}`,
        inline: false
      });
    }

    if (tickets.length > 5) {
      embed.setFooter({ text: `Showing 5 of ${tickets.length} tickets` });
    }

    await interaction.editReply({ embeds: [embed] });
  } catch (err) {
    logError('view-user-tickets', err, interaction).catch(() => {});
    await interaction.editReply('❌ Failed to fetch user tickets.');
  }
}

module.exports = { handleCreateTicketFromMessage, handleViewUserTickets };