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FIREBASE_SETUP.md

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-# Firebase Setup Guide
-
-## Firebase Project Information
-
-**Project ID:** `colorize-662df`  
-**Credentials File:** `colorize-662df-firebase-adminsdk-fbsvc-bfd21c77c6.json`
-
-## Required Firebase Configuration
-
-### 1. Firebase Admin SDK Credentials ✅
-The credentials file is already in the project:
-- File: `colorize-662df-firebase-adminsdk-fbsvc-bfd21c77c6.json`
-- The application will automatically detect and use this file
-
-### 2. Firebase Web API Key (Required for Login/Register)
-
-To get your Firebase Web API Key:
-
-1. Go to [Firebase Console](https://console.firebase.google.com/)
-2. Select your project: **colorize-662df**
-3. Click the gear icon ⚙️ → **Project settings**
-4. Scroll down to **Your apps** section
-5. Find the **Web API Key** (starts with `AIza...`)
-6. Copy this key
-
-**Set it as environment variable:**
-```bash
-export FIREBASE_API_KEY="AIzaSyBIB6rcfyyqy5niERTXWvVD714Ter4Vx68"
-```
-
-Or in Hugging Face Spaces:
-- Go to Settings → Secrets
-- Add secret: `FIREBASE_API_KEY` = `AIzaSyBIB6rcfyyqy5niERTXWvVD714Ter4Vx68`
-
-### 3. Firebase App Check Configuration
-
-For App Check to work, you need:
-
-1. **Enable App Check in Firebase Console:**
-   - Go to Firebase Console → **App Check**
-   - Register your app
-   - Choose **reCAPTCHA Enterprise** provider
-   - Get your **reCAPTCHA Site Key**
-
-2. **Frontend Setup:**
-   ```javascript
-   import { initializeApp } from "firebase/app";
-   import { initializeAppCheck, ReCaptchaEnterpriseProvider, getToken } from "firebase/app-check";
-
-   const firebaseConfig = {
-     apiKey: "AIzaSyBIB6rcfyyqy5niERTXWvVD714Ter4Vx68",
-     authDomain: "colorize-662df.firebaseapp.com",
-     projectId: "colorize-662df",
-     storageBucket: "colorize-662df.firebasestorage.app",
-     messagingSenderId: "69166278311",
-     appId: "1:69166278311:web:0e8c50b8dd8627aaeadd82",
-     measurementId: "G-58CC2J8XKX"
-   };
-
-   const app = initializeApp(firebaseConfig);
-
-   const appCheck = initializeAppCheck(app, {
-     provider: new ReCaptchaEnterpriseProvider('YOUR_RECAPTCHA_SITE_KEY'),
-     isTokenAutoRefreshEnabled: true
-   });
-
-   // Get token for API requests
-   const token = await getToken(appCheck);
-   ```
-
-## Environment Variables
-
-### For Local Development:
-```bash
-# Firebase credentials (optional if file is in project root)
-export FIREBASE_CREDENTIALS_PATH="./colorize-662df-firebase-adminsdk-fbsvc-bfd21c77c6.json"
-
-# Firebase Web API Key (required for /auth/login and /auth/register)
-export FIREBASE_API_KEY="AIzaSyBIB6rcfyyqy5niERTXWvVD714Ter4Vx68"
-
-# Optional: Disable auth for testing
-export DISABLE_AUTH="false"
-
-# Optional: Disable App Check
-export ENABLE_APP_CHECK="true"
-```
-
-### For Hugging Face Spaces:
-Add these as **Secrets** in Space Settings:
-
-1. **FIREBASE_CREDENTIALS** - Paste the entire contents of `colorize-662df-firebase-adminsdk-fbsvc-bfd21c77c6.json`
-2. **FIREBASE_API_KEY** - Your Web API Key (`AIzaSyBIB6rcfyyqy5niERTXWvVD714Ter4Vx68`)
-3. **HF_TOKEN** - Your Hugging Face token (for Inference API)
-
-## Testing Firebase Connection
-
-### Test 1: Health Check (No Auth Required)
-```bash
-curl https://logicgoinfotechspaces-text-guided-image-colorization.hf.space/health
-```
-
-### Test 2: Register User (Requires FIREBASE_API_KEY)
-```bash
-curl -X POST https://logicgoinfotechspaces-text-guided-image-colorization.hf.space/auth/register \
-  -H "Content-Type: application/json" \
-  -d '{
-    "email": "test@example.com",
-    "password": "password123",
-    "display_name": "Test User"
-  }'
-```
-
-### Test 3: Login (Requires FIREBASE_API_KEY)
-```bash
-curl -X POST https://logicgoinfotechspaces-text-guided-image-colorization.hf.space/auth/login \
-  -H "Content-Type: application/json" \
-  -d '{
-    "email": "test@example.com",
-    "password": "password123"
-  }'
-```
-
-### Test 4: Colorize with App Check Token
-```bash
-curl -X POST https://logicgoinfotechspaces-text-guided-image-colorization.hf.space/colorize \
-  -H "X-Firebase-AppCheck: YOUR_APP_CHECK_TOKEN" \
-  -F "file=@image.jpg"
-```
-
-## Troubleshooting
-
-### Issue: "Firebase not initialized"
-**Solution:** Make sure the credentials file exists and is readable
-
-### Issue: "Firebase API key not configured" (for login/register)
-**Solution:** Set `FIREBASE_API_KEY` environment variable
-
-### Issue: "Invalid App Check token"
-**Solution:** 
-1. Make sure App Check is enabled in Firebase Console
-2. Verify you're sending the token in `X-Firebase-AppCheck` header
-3. Check that reCAPTCHA Enterprise is properly configured
-
-### Issue: "Missing App Check token"
-**Solution:** 
-- Either provide `X-Firebase-AppCheck` header
-- Or set `ENABLE_APP_CHECK=false` to disable (not recommended for production)
-
-## Current Firebase Config
-
-Based on your credentials file:
-- **Project ID:** `colorize-662df`
-- **Service Account:** `firebase-adminsdk-fbsvc@colorize-662df.iam.gserviceaccount.com`
-- **Auth Domain:** `colorize-662df.firebaseapp.com`
-- **Storage Bucket:** `colorize-662df.firebasestorage.app`
-