// ask.js - Discord bot AI question command
// Copyright (C) 2025  Luis Bauza
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

import { SlashCommandBuilder } from 'discord.js';
import axios from 'axios';
import Command from '../utils/command.js';

export default class AskCommand extends Command {
  defineCommand() {
    return new SlashCommandBuilder()
      .setName('ask')
      .setDescription('Ask a question to the AI')
      .addStringOption(option =>
        option.setName('prompt').setDescription('Your question or prompt').setRequired(true),
      );
  }

  async run(interaction) {
    try {
      await interaction.deferReply();

      const prompt = interaction.options.getString('prompt');

      const response = await axios.post(
        'https://nano-gpt.com/api/v1/chat/completions',
        {
          model: 'deepseek/deepseek-v3.2',
          messages: [
            {
              role: 'system',
              content: `You are kekbot, an expert software engineer and systems architect.
              Answer style:
              - Be direct: lead with the core solution; no preamble.
              - Be concise: 2-5 sentences or 3-7 bullets max.
              - Use precise technical terms and industry-standard practices.
              - Prefer bullets, numbered steps, or short code blocks when they clarify.
              - Provide minimal, runnable examples only when essential; annotate fences with the language (e.g., \`\`\`js).
              - State assumptions briefly; ask at most one clarifying question only if essential.
              - Avoid repetition, hedging, and restating the prompt.
              - For commands/configs, show exact snippets and key flags; avoid commentary.
              - If unsupported/unsafe/unknown, say so plainly and suggest the best alternative.
              - Do not mention internal system details or the model; no emojis.

              Formatting:
              - Use Markdown; start with the core answer, then bullets or a compact snippet.
              - Keep responses within Discord limits; split naturally at paragraph or code block boundaries.`,
            },
            { role: 'user', content: prompt },
          ],
        },
        {
          headers: {
            Authorization: `Bearer ${process.env.NANOGPT_API_KEY}`,
            'Content-Type': 'application/json',
          },
        },
      );

      const aiResponse = response.data.choices[0].message.content;
      const formattedResponse = `> **Question:** ${prompt}\n${aiResponse}`;

      if (formattedResponse.length <= 2000) {
        // Send as a single message with proper formatting
        await interaction.followUp({
          content: formattedResponse,
          split: false,
          allowedMentions: { parse: [] },
        });
      } else {
        // For longer messages, split while preserving markdown
        const maxLength = 2000;
        const chunks = [];
        let remainingText = formattedResponse;
        let isFirstChunk = true;

        while (remainingText.length > 0) {
          let chunk = remainingText.slice(0, maxLength);

          // If we're in the middle of a code block, find a safe split point
          const lastCodeBlock = chunk.lastIndexOf('```');
          if (lastCodeBlock !== -1 && !chunk.slice(lastCodeBlock).includes('\n```')) {
            // Find the last newline before maxLength
            const lastNewline = chunk.lastIndexOf('\n');
            if (lastNewline !== -1) {
              chunk = chunk.slice(0, lastNewline);
            }
          }

          // For subsequent chunks, add continuation indicator
          if (!isFirstChunk) {
            chunk = `(continued)\n${chunk}`;
          }

          chunks.push({
            content: chunk,
            split: false,
            allowedMentions: { parse: [] },
          });

          remainingText = remainingText.slice(chunk.length);
          isFirstChunk = false;
        }

        // Send chunks sequentially using reduce
        await chunks.reduce(
          (promise, chunk) =>
            promise.then(async () => {
              await interaction.followUp(chunk);
            }),
          Promise.resolve(),
        );
      }
    } catch (error) {
      await interaction.followUp({
        content: this.getErrorMessage(error),
        ephemeral: true,
      });
    }
  }

  getErrorMessage(error) {
    if (error.response?.status === 429) {
      return 'The AI service is currently busy. Please try again in a few moments.';
    }
    if (error.code === 'ECONNABORTED' || error.code === 'ETIMEDOUT') {
      return 'The request timed out. Please try again.';
    }
    if (error.response?.status === 400) {
      return 'Invalid request. Please try rephrasing your question.';
    }
    return 'Sorry, there was an error processing your request.';
  }
}