"""
Image Service API endpoints
Handles image compression, storage, and serving
"""

from fastapi import APIRouter, HTTPException, Response, UploadFile, File
from fastapi.responses import JSONResponse
from utils.storage import temp_images
from utils.image_processor import compress_and_store_image
import os

router = APIRouter()

@router.post("/upload-image")
async def upload_image(file: UploadFile = File(...)):
    """
    Upload and host an image, returns public URL
    """
    try:
        # Read image bytes
        image_bytes = await file.read()
        
        # Convert to data URL for processing
        import base64
        encoded = base64.b64encode(image_bytes).decode('utf-8')
        data_url = f"data:{file.content_type};base64,{encoded}"
        
        # Get public URL from env or use default
        public_url = os.getenv('VITE_API_BASE_URL', 'http://localhost:4000')
        
        # Compress and store, get hosted URL
        hosted_url = await compress_and_store_image(data_url, public_url)
        
        return JSONResponse(content={
            "url": hosted_url,
            "filename": file.filename
        })
    
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Image upload failed: {str(e)}")


@router.get("/images/{image_id}")
async def serve_image(image_id: str):
    """
    Serve temporarily stored images
    Images are compressed and cached for 1 hour
    """
    if image_id not in temp_images:
        raise HTTPException(status_code=404, detail="Image not found")
    
    image_data = temp_images[image_id]
    
    return Response(
        content=image_data['buffer'],
        media_type=image_data['content_type'],
        headers={
            'Cache-Control': 'public, max-age=3600'
        }
    )