// ────────────────────────────────────────────────────────────────────────────────
//  bot.js  –  Discord bot rewritten for Node 25+ and Ollama (via run_prompt2)
// ────────────────────────────────────────────────────────────────────────────────

import { Client, GatewayIntentBits, Partials, PermissionsBitField } from 'discord.js';
import * as SECRET from '/srv/Projekt/dicsordbot/secret.mjs';

/* -------------------------------------------------------------------------- */
/*  1️⃣  Utility – run_prompt2 (Ollama helper) – the same you gave me           */
/* -------------------------------------------------------------------------- */

const MODEL = 'gpt-oss:20b';

/**
 * Query the local Ollama server.
 *
 * @param {string} system_prompt  System‑message that sets the persona.
 * @param {string} model          Model name.
 * @param {Array<{role:string,content:string}>} pieces  The chat messages.
 * @param {object} options        Optional Ollama options.
 * @returns {Promise<{status:number, response?:object, error?:string}>}
 */
export async function run_prompt2(system_prompt, model, pieces, options = { num_ctx: 16384 }) {
	const payload = {
		model,
		messages: [
			{ role: 'system', content: system_prompt },
			...pieces.map(entry => ({ role: 'user', content: entry }))
		],
		stream: false,
		options,
	};

	const response = await fetch('http://localhost:11434/api/chat', {
		method: 'POST',
		headers: { 'Content-Type': 'application/json' },
		body: JSON.stringify(payload),
	});

	if (response.ok) {
		return { status: response.status, response: await response.json() };
	} else {
		return { status: response.status, error: await response.text() };
	}
}

/* -------------------------------------------------------------------------- */
/*  2️⃣  Discord bot configuration – intents & partials                      */
/* -------------------------------------------------------------------------- */

const client = new Client({
	intents: [
		GatewayIntentBits.Guilds,
		GatewayIntentBits.GuildMessages,
		GatewayIntentBits.MessageContent,
		GatewayIntentBits.GuildMembers,
	],
	partials: [Partials.Message, Partials.Channel], // safety
});

/* -------------------------------------------------------------------------- */
/*  3️⃣  Secrets – pulled from secret.mjs                                  */
/* -------------------------------------------------------------------------- */

const { API_TOKEN, PERMISSIONS, SERVER_ID, CHANNEL_ID } = SECRET;

/* -------------------------------------------------------------------------- */
/*  4️⃣  Allow‑list – only these user IDs may invoke the bot                */
/* -------------------------------------------------------------------------- */

const ALLOW_LIST = new Set([
	267085394548490241n,
	310828422362431490n,
	450834412049924097n,
	277582984129806337n,
	622871531881627648n,
]);

/* -------------------------------------------------------------------------- */
/*  5️⃣  Helpers                                                            */
/* -------------------------------------------------------------------------- */

function splitDiscordMessage(text) {
	const MAX = 1900; // buffer
	const chunks = [];
	let start = 0;
	while (start < text.length) {
		let end = Math.min(start + MAX, text.length);
		const nl = text.lastIndexOf('\n', end);
		const sp = text.lastIndexOf(' ', end);
		if (nl > start) end = nl + 1;
		else if (sp > start) end = sp + 1;
		chunks.push(text.slice(start, end));
		start = end;
	}
	return chunks;
}

/* -------------------------------------------------------------------------- */
/*  6️⃣  Core message handler                                               */
/* -------------------------------------------------------------------------- */

async function handleMessage(msg) {
	if (msg.author.id === client.user.id) return; // ignore self

	// Only process messages from the target guild & channel
	if (msg.guild?.id !== SERVER_ID) return;
	//if (msg.channel.id !== CHANNEL_ID) return;

	// Allow‑list check
	/*
	if (!ALLOW_LIST.has(BigInt(msg.author.id))) {
		await msg.reply(
			`Currently only people in the allow list may use this bot. If you want to participate, just let <@310828422362431490> know! <:astral_yak:1098185039805681755>`
		);
		return;
	}
	*/

	const mention = `<@${client.user.id}>`;
	if (!msg.content.includes(mention)) return; // not a mention

	/* 5a  Build the system prompt (Silicon Duck persona) */
	const systemPrompt = `You are Silicon Duck, a helpful, cheerful, and generally excited creative Discord bot in the server 'Mikael Lövqvist's shenanigans'. You do NOT retain any history across messages. Your tag is <@${client.user.id}>, do not tag yourself in replies. The current channel is '${msg.channel.name}'. The user is ${msg.author.username} with tag <@${msg.author.id}>. You should not produce code examples unless explicitly asked. Do not make markdown tables, discord does not support those. You are running the model ${MODEL} using Ollama and OpenWebUI. Dial back emoji use.`;

	/* 5b  Check for special commands that use PERMISSIONS */
	if (msg.content.startsWith('!create ')) {
		// !create <channel‑name>
		const name = msg.content.slice('!create '.length).trim();
		if (!name) return msg.reply('Usage: `!create <channel-name>`');
		try {
			const newCh = await msg.guild.channels.create({
				name,
				type: 0, // TextChannel
				permissionOverwrites: [
					{
						id: msg.guild.id, // @everyone
						allow: Number(BigInt(PERMISSIONS)), // use the provided bit‑mask
					},
				],
			});
			await msg.reply(`✅ Created ${newCh.name} with the requested permissions.`);
		} catch (err) {
			console.error('Channel‑create error', err);
			await msg.reply('❌ Could not create the channel.');
		}
		return; // finished command
	}

	/* 5c  Build the system prompt (Silicon Duck persona) */
	const userMessage = msg.content;

	/* 5d  Query Ollama via run_prompt2 */
	let runResponse;
	try {
		const reply = await run_prompt2(systemPrompt, MODEL, [userMessage], { num_ctx: 16384 });
		if (reply.status !== 200) {
			console.error('Ollama error', reply.error);
			await msg.reply('Sorry, I ran into an error while thinking.');
			return;
		}
		runResponse = reply.response;
	} catch (e) {
		console.error('Error calling Ollama:', e);
		await msg.reply('Sorry, I couldn’t reach the AI service.');
		return;
	}


	/* 5e  Extract the answer text */
	const answer = runResponse?.message?.content ?? '';
	if (!answer) {
		await msg.reply('Sorry, I didn’t receive a reply from the AI.');
		return;
	}

	/* 5f  Send the answer back to Discord (chunked) */
	const chunks = splitDiscordMessage(answer);
	for (const chunk of chunks) await msg.channel.send(chunk);

	console.log(`Answered to ${msg.author.username} (${msg.author.id}) in ${chunks.length} chunk(s).`);
}

/* -------------------------------------------------------------------------- */
/*  7️⃣  Hook up Discord events                                            */
/* -------------------------------------------------------------------------- */

client.once('clientReady', () => {
	console.log(`✅  Logged in as ${client.user.tag}`);
});

client.on('messageCreate', handleMessage);

/* -------------------------------------------------------------------------- */
/*  8️⃣  Start the bot                                                     */
/* -------------------------------------------------------------------------- */

client.login(API_TOKEN).catch(err => {
	console.error('❌  Failed to login', err);
	process.exit(1);
});