import express from 'express';
import bodyParser from 'body-parser';
import cors from 'cors';
import { StateManager, initDB } from './stateManager.js';
import { AIEngine } from './aiEngine.js';
import fs from 'fs';
import admin from 'firebase-admin';
import crypto from "crypto";

// --- FIREBASE SETUP ---
let db = null;
let firestore = null;
let storage = null;

try {
    if (process.env.FIREBASE_SERVICE_ACCOUNT_JSON) {
        const serviceAccount = JSON.parse(process.env.FIREBASE_SERVICE_ACCOUNT_JSON);
        
        // Specific bucket as requested
        const bucketName = `shago-web.firebasestorage.app`; 

        if (admin.apps.length === 0) {
            admin.initializeApp({
                credential: admin.credential.cert(serviceAccount),
                databaseURL: "https://shago-web-default-rtdb.firebaseio.com", 
                storageBucket: bucketName
            });
        }
        
        db = admin.database();
        firestore = admin.firestore();
        storage = admin.storage();
        
        initDB(db);
        console.log("🔥 Firebase Connected (RTDB, Firestore, Storage) & StateManager Linked");
    } else {
        console.warn("⚠️ Memory-Only mode.");
    }
} catch (e) { console.error("Firebase Init Error:", e); }


const app = express();
const PORT = process.env.PORT || 7860;

// ---
/*

app.use((req, res, next) => {
  console.log('[REQ]', req.method, req.originalUrl);
  console.log('[HEADERS]', req.headers);
  console.log('[BODY]', req.body ?? '(unparseable or empty)');
  next();
});

*/

// ---


// Load prompts safely
let sysPrompts = {};
try {
    sysPrompts = JSON.parse(fs.readFileSync('./prompts.json', 'utf8'));
} catch (e) {
    console.error("Failed to load prompts.json:", e);
}

app.use(cors());
app.use(bodyParser.json({ limit: '50mb' }));

// --- CREDIT CONFIGURATION ---

// Minimums required to start a request
const MIN_BASIC_REQUIRED = 50; 
const MIN_DIAMOND_REQUIRED = 50; 

// Fixed cost for images (Basic credits)
const IMAGE_COST_BASIC = 1000; 

/**
 * Checks if user has enough credits of a specific type.
 * @param {string} userId 
 * @param {'basic'|'diamond'} type 
 */
async function checkMinimumCredits(userId, type = 'basic') {
    if (!db) return; 

    // Path: users/{uid}/credits/basic OR users/{uid}/credits/diamond
    const snap = await db.ref(`users/${userId}/credits/${type}`).once('value');
    const credits = snap.val() || 0;

    const required = type === 'diamond' ? MIN_DIAMOND_REQUIRED : MIN_BASIC_REQUIRED;

    if (credits < required) {
      
        res.status(500).json({ 
          insufficient: true,
          error:`Insufficient ${type} credits. You have ${credits}, need minimum ${required} to proceed.`
   
        });
        // throw new Error(`Insufficient ${type} credits. You have ${credits}, need minimum ${required} to proceed.`);
    }
}

/**
 * Deducts exact tokens from the user's specific wallet.
 * @param {string} userId 
 * @param {number} amount 
 * @param {'basic'|'diamond'} type 
 */
async function deductUserCredits(userId, amount, type = 'basic') {
    if (!db || !amount || amount <= 0) return;
    
    try {
        const ref = db.ref(`users/${userId}/credits/${type}`);
        await ref.transaction((current_credits) => {
            const current = current_credits || 0;
            return Math.max(0, current - amount);
        });
        console.log(`[Credits] Deducted ${amount} ${type} credits from User ${userId}`);
    } catch (err) {
        console.error(`[Credits] Failed to deduct ${amount} ${type} from ${userId}:`, err);
    }
}

// --- MIDDLEWARE ---

const validateRequest = (req, res, next) => {
    if (req.path.includes('/admin/cleanup')) return next();
    
    const { userId, projectId } = req.body;
    
    // Ensure userId exists for credit checks
    if (!userId && (req.path.includes('/onboarding') || req.path.includes('/new') || req.path.includes('/project'))) {
        return res.status(400).json({ error: "Missing userId" });
    }
    
    next();
};

function extractWorkerPrompt(text) {
    const match = text.match(/WORKER_PROMPT:\s*(.*)/s);
    return match ? match[1].trim() : null;
}

function formatContext({ hierarchyContext, scriptContext, logContext }) {
    let out = "";
    if (scriptContext) out += `\n[TARGET SCRIPT]: ${scriptContext.targetName}\n[SOURCE PREVIEW]: ${scriptContext.scriptSource?.substring(0, 1000)}...`;
    if (logContext) out += `\n[LAST LOGS]: ${logContext.logs}`;
    return out;
}

function extractPMQuestion(text) {
    const match = text.match(/\[ASK_PM:\s*(.*?)\]/s); 
    return match ? match[1].trim() : null;
}

function extractImagePrompt(text) {
    const match = text.match(/\[GENERATE_IMAGE:\s*(.*?)\]/s);
    return match ? match[1].trim() : null;
}

// --- ADMIN ENDPOINTS ---

app.get('/admin/cleanup', async (req, res) => {
    try {
        const removed = StateManager.cleanupMemory();
        res.json({ success: true, removedCount: removed });
    } catch (err) {
        res.status(500).json({ error: "Cleanup failed" });
    }
});

// --- ONBOARDING ENDPOINTS ---

app.post('/onboarding/analyze', validateRequest, async (req, res) => {
    const { description, userId } = req.body;
  
    if (!description) return res.status(400).json({ error: "Description required" });

    try {
        // Analyst uses BASIC models (Flash)
        await checkMinimumCredits(userId, 'basic');

        console.log(`[Onboarding] Analyzing idea...`);
        
        const result = await AIEngine.generateEntryQuestions(description);
        
        const usage = result.usage?.totalTokenCount || 0;

        // Bill Basic
        if (usage > 0) await deductUserCredits(userId, usage, 'basic');

        if (result.status === "REJECTED") {
            return res.json({ 
                rejected: true, 
                reason: result.reason || "Idea violates TOS." 
            });
        }
        res.json({ questions: result.questions });

    } catch (err) {
        console.error(err);
        if (err.message.includes("Insufficient")) {
            return res.status(402).json({ error: err.message });
        }
        res.status(500).json({ error: "Analysis failed" });
    }
});

app.post('/onboarding/create', validateRequest, async (req, res) => {
    const { userId, description, answers } = req.body;
    let basicTokens = 0; // Create flow uses Grader (Basic) + Image (Basic)

    try {
        // Pre-flight check
        await checkMinimumCredits(userId, 'basic');

        const randomHex = (n = 6) => crypto.randomBytes(Math.ceil(n/2)).toString("hex").slice(0, n);
        const projectId = `proj_${Date.now()}_${randomHex(7)}`;

        console.log(`[Onboarding] Grading Project ${projectId}...`);

        // 1. Grading (Basic)
        const gradingResult = await AIEngine.gradeProject(description, answers);
        basicTokens += (gradingResult.usage?.totalTokenCount || 0);

        const isFailure = gradingResult.feasibility < 30 || gradingResult.rating === 'F';

        let thumbnailBase64 = null;

        if (!isFailure) {
            console.log(`[Onboarding] ✅ Passed. Generating Thumbnail...`);
            const imagePrompt = `Game Title: ${gradingResult.title}. Core Concept: ${description}`;
            
            // 2. Image Generation (Basic)
            const imgResult = await AIEngine.generateImage(imagePrompt);
            if (imgResult) {
                thumbnailBase64 = imgResult.image;
                // Add token usage for text + fixed cost
                basicTokens += (imgResult.usage || 0); 
                if (imgResult.image) basicTokens += IMAGE_COST_BASIC;
            }
        }

        // Upload Logic
        let thumbnailUrl = null;
        if (thumbnailBase64 && storage) {
            try {
                const base64Data = thumbnailBase64.replace(/^data:image\/\w+;base64,/, "");
                const buffer = Buffer.from(base64Data, 'base64');
                const bucket = storage.bucket();
                const file = bucket.file(`${projectId}/thumbnail.png`);
                await file.save(buffer, { metadata: { contentType: 'image/png' } });
                await file.makePublic();
                thumbnailUrl = `https://storage.googleapis.com/${bucket.name}/${projectId}/thumbnail.png`;
            } catch (uploadErr) {
                console.error("Storage Upload Failed:", uploadErr);
            }
        }

        const timestamp = Date.now();
        const status = isFailure ? "rejected" : "Idle";

        // Save Data Logic
        if (!isFailure) {
            const memoryObject = {
                id: projectId,
                userId,
                title: gradingResult.title || "Untitled",
                description,
                answers,
                stats: gradingResult,
                thumbnail: thumbnailUrl, 
                createdAt: timestamp,
                status,
                workerHistory: [],
                pmHistory: [],
                commandQueue: [],
                failureCount: 0
            };
            await StateManager.updateProject(projectId, memoryObject);
        }

        if (firestore && !isFailure) {
            await firestore.collection('projects').doc(projectId).set({
                id: projectId,
                userId: userId,
                assets: thumbnailUrl ? [thumbnailUrl] : [],
                createdAt: admin.firestore.FieldValue.serverTimestamp()
            });
        }

        if (db && !isFailure) {
            const updates = {};
            updates[`projects/${projectId}/info`] = {
                id: projectId,
                userId,
                title: gradingResult.title || "Untitled",
                description,
                answers,
                stats: gradingResult,
                createdAt: timestamp,
                status
            };
            if (thumbnailUrl) updates[`projects/${projectId}/thumbnail`] = { url: thumbnailUrl };
            updates[`projects/${projectId}/state`] = {
                workerHistory: [],
                pmHistory: [],
                commandQueue: [],
                failureCount: 0
            };
            await db.ref().update(updates);
        }

        // Deduct Basic Credits
        if (basicTokens > 0) await deductUserCredits(userId, basicTokens, 'basic');
       console.log("sending");
        res.json({ 
          status: 200,
            success: !isFailure, 
            projectId, 
            stats: gradingResult, 
            title: gradingResult.title || "Untitled",
            thumbnail: thumbnailBase64
        });

    } catch (err) {
        console.error("Create Error:", err);
        if (err.message.includes("Insufficient")) {
            return res.status(402).json({ error: err.message });
        }
        res.status(500).json({ error: "Creation failed" });
    }
});

// --- CORE ENDPOINTS ---

async function runBackgroundInitialization(projectId, userId, description) {
    console.log(`[Background] Starting initialization for ${projectId}`);
    
    // Separate Counters
    let diamondUsage = 0; // For PM
    let basicUsage = 0;   // For Worker

    try {
        const pmHistory = [];
        
        // 1. Generate GDD (PM -> Diamond)
        const gddPrompt = `Create a comprehensive GDD for: ${description}`;
        const gddResult = await AIEngine.callPM(pmHistory, gddPrompt);
        
        diamondUsage += (gddResult.usage?.totalTokenCount || 0);
        const gddText = gddResult.text;

        pmHistory.push({ role: 'user', parts: [{ text: gddPrompt }] });
        pmHistory.push({ role: 'model', parts: [{ text: gddText }] });

        // 2. Generate First Task (PM -> Diamond)
        const taskPrompt = "Based on the GDD, generate the first technical milestone.\nOutput format:\nTASK_NAME: <Name>\nWORKER_PROMPT: <Specific, isolated instructions for the worker>";
        const taskResult = await AIEngine.callPM(pmHistory, taskPrompt);
        
        diamondUsage += (taskResult.usage?.totalTokenCount || 0);
        const taskText = taskResult.text;

        pmHistory.push({ role: 'user', parts: [{ text: taskPrompt }] });
        pmHistory.push({ role: 'model', parts: [{ text: taskText }] });

        // 3. Initialize Worker (Worker -> Basic)
        const initialWorkerInstruction = extractWorkerPrompt(taskText) || `Initialize structure for: ${description}`;
        const workerHistory = [];
        const initialWorkerPrompt = `CONTEXT: New Project. \nINSTRUCTION: ${initialWorkerInstruction}`;
        
        const workerResult = await AIEngine.callWorker(workerHistory, initialWorkerPrompt, []);
        
        basicUsage += (workerResult.usage?.totalTokenCount || 0);
        const workerText = workerResult.text;

        workerHistory.push({ role: 'user', parts: [{ text: initialWorkerPrompt }] });
        workerHistory.push({ role: 'model', parts: [{ text: workerText }] });

        // 4. Update Memory
        await StateManager.updateProject(projectId, {
            userId,
            pmHistory,
            workerHistory,
            gdd: gddText,
            failureCount: 0
        });

        // 5. Queue commands (Handle assets + basic costs)
        // We pass userId to deduct image costs (Basic) immediately inside this function
        await processAndQueueResponse(projectId, workerText, userId); 
        
        // 6. Update Status
        if(db) await db.ref(`projects/${projectId}/info`).update({
            status: "IDLE",
            lastUpdated: Date.now()
        });
        
        // 7. Deduct Accumulated Credits
        if (diamondUsage > 0) await deductUserCredits(userId, diamondUsage, 'diamond');
        if (basicUsage > 0) await deductUserCredits(userId, basicUsage, 'basic');
        
        console.log(`[Background] Init complete. Diamond: ${diamondUsage}, Basic: ${basicUsage}`);

    } catch (err) {
        console.error(`[Background] Init Error for ${projectId}:`, err);
        if(db) await db.ref(`projects/${projectId}/info/status`).set("error");
    }
}

app.post('/new/project', validateRequest, async (req, res) => {
    const { userId, projectId, description } = req.body;
    
    try {
        // Init requires BOTH types to be safe
        await checkMinimumCredits(userId, 'diamond');
        await checkMinimumCredits(userId, 'basic');

        if(db) db.ref(`projects/${projectId}/info/status`).set("initializing");
        
        res.json({ 
            success: true, 
            message: "Project initialization started in background."
        });

        runBackgroundInitialization(projectId, userId, description);

    } catch (err) {
        if (err.message.includes("Insufficient")) {
            return res.status(402).json({ error: err.message });
        }
        res.status(500).json({ error: "Failed to start project" });
    }
});

app.post('/project/feedback', async (req, res) => {
    const { userId, projectId, prompt, hierarchyContext, scriptContext, logContext, taskComplete, images } = req.body;
    
    let diamondUsage = 0;
    let basicUsage = 0;
    
    try {
        const project = await StateManager.getProject(projectId);
        if (!project) return res.status(404).json({ error: "Project not found." });
        if (project.userId !== userId) return res.status(403).json({ error: "Unauthorized" });

        // Basic Check (most interaction is worker)
        await checkMinimumCredits(userId, 'basic');
        
        if(db) await db.ref(`projects/${projectId}/info/status`).set("working");
          
        if (taskComplete) {
            console.log(`[${projectId}] ✅ TASK COMPLETE.`);
            const summary = `Worker completed the previous task. Logs: ${logContext?.logs || "Clean"}. \nGenerate the NEXT task using 'WORKER_PROMPT:' format.`;
            
            // PM Call -> Diamond
            const pmResult = await AIEngine.callPM(project.pmHistory, summary);
            diamondUsage += (pmResult.usage?.totalTokenCount || 0);
            const pmText = pmResult.text;
            
            project.pmHistory.push({ role: 'user', parts: [{ text: summary }] });
            project.pmHistory.push({ role: 'model', parts: [{ text: pmText }] });

            const nextInstruction = extractWorkerPrompt(pmText);
            if (!nextInstruction) {
                 await StateManager.updateProject(projectId, { pmHistory: project.pmHistory, status: "IDLE" });
                 if(db) await db.ref(`projects/${projectId}/info`).update({ status: "IDLE", lastUpdated: Date.now() });
                 
                 // Deduct what we used
                 if (diamondUsage > 0) await deductUserCredits(userId, diamondUsage, 'diamond');
                 
                 return res.json({ success: true, message: "No further tasks. Project Idle." });
            }

            const newWorkerHistory = [];
            const newPrompt = `New Objective: ${nextInstruction}`;
            
            // Worker Call -> Basic
            const workerResult = await AIEngine.callWorker(newWorkerHistory, newPrompt, []);
            basicUsage += (workerResult.usage?.totalTokenCount || 0);
            const workerText = workerResult.text;

            newWorkerHistory.push({ role: 'user', parts: [{ text: newPrompt }] });
            newWorkerHistory.push({ role: 'model', parts: [{ text: workerText }] });

            await StateManager.updateProject(projectId, {
                pmHistory: project.pmHistory,
                workerHistory: newWorkerHistory,
                failureCount: 0
            });

            StateManager.queueCommand(projectId, { type: "EXECUTE", payload: "warn('Starting Next Task...')" });
            await processAndQueueResponse(projectId, workerText, userId);
            
            if(db) await db.ref(`projects/${projectId}/info`).update({ status: "working", lastUpdated: Date.now() });

            // Final Bill
            if (diamondUsage > 0) await deductUserCredits(userId, diamondUsage, 'diamond');
            if (basicUsage > 0) await deductUserCredits(userId, basicUsage, 'basic');

            return res.json({ success: true, message: "Next Task Assigned" });
        }

        // Logic for Failure Handling (PM Guidance)
        if (project.failureCount > 3) {
            const pmPrompt = (sysPrompts.pm_guidance_prompt || "Analyze logs: {{LOGS}}").replace('{{LOGS}}', logContext?.logs);
            
            // PM -> Diamond
            const pmResult = await AIEngine.callPM(project.pmHistory, pmPrompt);
            diamondUsage += (pmResult.usage?.totalTokenCount || 0);
            const pmVerdict = pmResult.text;

            if (pmVerdict.includes("[TERMINATE]")) {
                const fixInstruction = pmVerdict.replace("[TERMINATE]", "").trim();
                const resetHistory = [];
                const resetPrompt = `[SYSTEM]: Previous worker terminated. \nNew Objective: ${fixInstruction}`;
                
                // Worker -> Basic
                const workerResult = await AIEngine.callWorker(resetHistory, resetPrompt, []);
                basicUsage += (workerResult.usage?.totalTokenCount || 0);
                
                resetHistory.push({ role: 'user', parts: [{ text: resetPrompt }] });
                resetHistory.push({ role: 'model', parts: [{ text: workerResult.text }] });

                await StateManager.updateProject(projectId, { workerHistory: resetHistory, failureCount: 0 });
                StateManager.queueCommand(projectId, { type: "EXECUTE", payload: "print('SYSTEM: Worker Reset')" });
                await processAndQueueResponse(projectId, workerResult.text, userId);
                
                if (diamondUsage > 0) await deductUserCredits(userId, diamondUsage, 'diamond');
                if (basicUsage > 0) await deductUserCredits(userId, basicUsage, 'basic');
                return res.json({ success: true, message: "Worker Terminated." });
            } else {
                const injection = `[PM GUIDANCE]: ${pmVerdict} \n\nApply this fix now.`;
                
                // Worker -> Basic
                const workerResult = await AIEngine.callWorker(project.workerHistory, injection, []);
                basicUsage += (workerResult.usage?.totalTokenCount || 0);

                project.workerHistory.push({ role: 'user', parts: [{ text: injection }] });
                project.workerHistory.push({ role: 'model', parts: [{ text: workerResult.text }] });
                
                await StateManager.updateProject(projectId, { workerHistory: project.workerHistory, failureCount: 1 });
                await processAndQueueResponse(projectId, workerResult.text, userId);
                
                if (diamondUsage > 0) await deductUserCredits(userId, diamondUsage, 'diamond');
                if (basicUsage > 0) await deductUserCredits(userId, basicUsage, 'basic');
                return res.json({ success: true, message: "PM Guidance Applied." });
            }
        }

        // Standard Interaction (Worker Only = Basic)
        const fullInput = `USER: ${prompt || "Automatic Feedback"}` + formatContext({ hierarchyContext, scriptContext, logContext });
        
        let workerResult = await AIEngine.callWorker(project.workerHistory, fullInput, images || []);
        basicUsage += (workerResult.usage?.totalTokenCount || 0);
        let responseText = workerResult.text;
        
        // PM Consultation Check
        const pmQuestion = extractPMQuestion(responseText);
        if (pmQuestion) {
            // PM -> Diamond
            const pmConsultPrompt = `[WORKER CONSULTATION]: The Worker asks: "${pmQuestion}"\nProvide a technical answer to unblock them.`;
            const pmResult = await AIEngine.callPM(project.pmHistory, pmConsultPrompt);
            diamondUsage += (pmResult.usage?.totalTokenCount || 0);
            const pmAnswer = pmResult.text;

            project.pmHistory.push({ role: 'user', parts: [{ text: pmConsultPrompt }] });
            project.pmHistory.push({ role: 'model', parts: [{ text: pmAnswer }] });

            const injectionMsg = `[PM RESPONSE]: ${pmAnswer}`;
            project.workerHistory.push({ role: 'user', parts: [{ text: fullInput }] });
            project.workerHistory.push({ role: 'model', parts: [{ text: responseText }] });
            
            // Re-call Worker -> Basic
            workerResult = await AIEngine.callWorker(project.workerHistory, injectionMsg, []);
            basicUsage += (workerResult.usage?.totalTokenCount || 0);
            responseText = workerResult.text;

            project.workerHistory.push({ role: 'user', parts: [{ text: injectionMsg }] });
            project.workerHistory.push({ role: 'model', parts: [{ text: responseText }] });
        } else {
            project.workerHistory.push({ role: 'user', parts: [{ text: fullInput }] });
            project.workerHistory.push({ role: 'model', parts: [{ text: responseText }] });
        }

        await StateManager.updateProject(projectId, { 
            workerHistory: project.workerHistory,
            pmHistory: project.pmHistory, 
            failureCount: project.failureCount 
        });
        
        await processAndQueueResponse(projectId, responseText, userId);
        
        if(db) await db.ref(`projects/${projectId}/info`).update({ status: "idle", lastUpdated: Date.now() });
      
        // Final Billing
        if (diamondUsage > 0) await deductUserCredits(userId, diamondUsage, 'diamond');
        if (basicUsage > 0) await deductUserCredits(userId, basicUsage, 'basic');

        res.json({ success: true });

    } catch (err) {
        console.error("AI Error:", err);
        if (err.message.includes("Insufficient")) {
            return res.status(402).json({ error: err.message });
        }
        res.status(500).json({ error: "AI Failed" });
    }
});

app.post('/project/ping', async (req, res) => {
    const { projectId, userId } = req.body;
    if (!projectId || !userId) return res.status(400).json({ error: "Missing ID fields" });
    
    const project = await StateManager.getProject(projectId);
    if (!project) return res.status(404).json({ action: "IDLE", error: "Project not found" });
    if (project.userId !== userId) return res.status(403).json({ error: "Unauthorized" });

    const command = await StateManager.popCommand(projectId);
    
    if (command) {
        if (command.payload === "CLEAR_CONSOLE") {
             res.json({ action: "CLEAR_LOGS" });
        } else {
            res.json({ 
                action: command.type, 
                target: command.payload, 
                code: command.type === 'EXECUTE' ? command.payload : null 
            });
        }
    } else {
        res.json({ action: "IDLE" });
    }
});

app.post('/human/override', validateRequest, async (req, res) => {
    const { projectId, instruction, pruneHistory, userId } = req.body;
    let basicUsage = 0;

    try {
        await checkMinimumCredits(userId, 'basic');

        const project = await StateManager.getProject(projectId);
        const overrideMsg = `[SYSTEM OVERRIDE]: ${instruction}`;

        if (pruneHistory && project.workerHistory.length >= 2) {
            project.workerHistory.pop();
            project.workerHistory.pop();
        }

        // Worker -> Basic
        const workerResult = await AIEngine.callWorker(project.workerHistory, overrideMsg, []);
        basicUsage += (workerResult.usage?.totalTokenCount || 0);

        project.workerHistory.push({ role: 'user', parts: [{ text: overrideMsg }] });
        project.workerHistory.push({ role: 'model', parts: [{ text: workerResult.text }] });
        
        await StateManager.updateProject(projectId, { workerHistory: project.workerHistory });
        await processAndQueueResponse(projectId, workerResult.text, userId);
        
        if (basicUsage > 0) await deductUserCredits(userId, basicUsage, 'basic');
        
        res.json({ success: true });
    } catch (err) {
        if (err.message.includes("Insufficient")) {
            return res.status(402).json({ error: err.message });
        }
        res.status(500).json({ error: "Override Failed" });
    }
});

// Helper to handle Asset Parsing & Billing (Basic Credits)
async function processAndQueueResponse(projectId, rawResponse, userId) {
    const imgPrompt = extractImagePrompt(rawResponse);
    if (imgPrompt) {
        console.log(`[${projectId}] 🎨 Generating Asset: ${imgPrompt}`);
        
        // 1. Generate Image (returns { image, usage } or null)
        const imgResult = await AIEngine.generateImage(imgPrompt);
        
        if (imgResult && imgResult.image) {
            // 2. Bill for image tokens immediately (Basic)
            const imgTokens = imgResult.usage?.totalTokenCount || 0;
            const totalCost = imgTokens; // imgTokens + IMAGE_COST_BASIC;
            
            if (userId && totalCost > 0) {
                await deductUserCredits(userId, totalCost, 'basic');
            }

            // 3. Queue creation command
            await StateManager.queueCommand(projectId, { type: "CREATE_ASSET", payload: imgResult.image });
        }
    }
    // Queue the raw text response for the frontend
    await StateManager.queueCommand(projectId, rawResponse);
}

app.listen(PORT, () => {
    console.log(`AI Backend Running on ${PORT}`);
});