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"""Image correction and regeneration endpoints."""
import os
import time
import uuid
import random
import logging
from datetime import datetime
from fastapi import APIRouter, HTTPException, Depends
from api.schemas import (
ImageCorrectRequest,
ImageCorrectResponse,
ImageRegenerateRequest,
ImageRegenerateResponse,
ImageSelectionRequest,
)
from services.correction import correction_service
from services.database import db_service
from services.image import image_service
from services.auth_dependency import get_current_user
from config import settings
router = APIRouter(tags=["correction"])
api_logger = logging.getLogger("api")
@router.post("/api/correct", response_model=ImageCorrectResponse)
async def correct_image(
request: ImageCorrectRequest,
username: str = Depends(get_current_user),
):
"""
Correct an image by analyzing it for spelling and visual issues,
then regenerating a corrected version. Requires authentication.
"""
api_start_time = time.time()
api_logger.info("API: Correction request received | User: %s | Image ID: %s", username, request.image_id)
try:
image_url = request.image_url
ad = None
if request.image_id != "temp-id":
ad = await db_service.get_ad_creative(request.image_id, username=username)
if not ad:
raise HTTPException(status_code=404, detail=f"Ad creative with ID {request.image_id} not found or access denied")
if not image_url:
image_url = ad.get("r2_url") or ad.get("image_url")
if not image_url:
raise HTTPException(status_code=400, detail="Image URL must be provided for images not in database, or found in database for provided ID")
image_bytes = await image_service.load_image(
image_id=request.image_id if request.image_id != "temp-id" else None,
image_url=image_url,
image_bytes=None,
filepath=None,
)
if not image_bytes:
raise HTTPException(status_code=404, detail="Image not found for analysis. Please ensure the URL is accessible.")
original_prompt = ad.get("image_prompt") if ad else None
result = await correction_service.correct_image(
image_bytes=image_bytes,
image_url=image_url,
original_prompt=original_prompt,
width=1024,
height=1024,
niche=ad.get("niche", "others") if ad else "others",
user_instructions=request.user_instructions,
auto_analyze=request.auto_analyze,
)
response_data = {
"status": result["status"],
"analysis": result.get("analysis"),
"corrections": None,
"corrected_image": None,
"error": result.get("error"),
}
if result.get("corrections"):
c = result["corrections"]
response_data["corrections"] = {
"spelling_corrections": c.get("spelling_corrections", []),
"visual_corrections": c.get("visual_corrections", []),
"corrected_prompt": c.get("corrected_prompt", ""),
}
if result.get("corrected_image"):
ci = result["corrected_image"]
response_data["corrected_image"] = {
"filename": ci.get("filename"),
"filepath": ci.get("filepath"),
"image_url": ci.get("image_url"),
"r2_url": ci.get("r2_url"),
"model_used": ci.get("model_used"),
"corrected_prompt": ci.get("corrected_prompt"),
}
if result.get("status") == "success" and result.get("_db_metadata") and ad:
db_metadata = result["_db_metadata"]
correction_metadata = {
"is_corrected": True,
"correction_date": datetime.utcnow().isoformat() + "Z",
}
for k, v in [
("original_image_url", ad.get("r2_url") or ad.get("image_url")),
("original_r2_url", ad.get("r2_url")),
("original_image_filename", ad.get("image_filename")),
("original_image_model", ad.get("image_model")),
("original_image_prompt", ad.get("image_prompt")),
]:
if v:
correction_metadata[k] = v
if result.get("corrections"):
correction_metadata["corrections"] = result.get("corrections")
update_kwargs = {
"image_url": db_metadata.get("image_url"),
"image_filename": db_metadata.get("filename"),
"image_model": db_metadata.get("model_used"),
"image_prompt": db_metadata.get("corrected_prompt"),
}
if db_metadata.get("r2_url"):
update_kwargs["r2_url"] = db_metadata.get("r2_url")
update_success = await db_service.update_ad_creative(
ad_id=request.image_id,
username=username,
metadata=correction_metadata,
**update_kwargs,
)
if update_success and response_data.get("corrected_image") is not None:
response_data["corrected_image"]["ad_id"] = request.image_id
api_logger.info("Correction request completed in %.2fs", time.time() - api_start_time)
return response_data
except HTTPException:
raise
except Exception as e:
api_logger.exception("Correction failed")
raise HTTPException(status_code=500, detail=str(e))
@router.post("/api/regenerate", response_model=ImageRegenerateResponse)
async def regenerate_image(
request: ImageRegenerateRequest,
username: str = Depends(get_current_user),
):
"""
Regenerate an image for an existing ad creative with an optional new model.
If preview_only=True, returns preview without updating DB; use confirm to save.
"""
api_start_time = time.time()
try:
ad = await db_service.get_ad_creative(request.image_id, username=username)
if not ad:
raise HTTPException(status_code=404, detail="Ad creative not found or access denied")
image_prompt = ad.get("image_prompt")
if not image_prompt:
raise HTTPException(status_code=400, detail="No image prompt found for this ad creative.")
model_to_use = request.image_model or ad.get("image_model") or settings.image_model
seed = random.randint(1, 2147483647)
image_bytes, model_used, generated_url = await image_service.generate(
prompt=image_prompt,
width=1024,
height=1024,
seed=seed,
model_key=model_to_use,
)
timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
unique_id = uuid.uuid4().hex[:8]
niche = ad.get("niche", "unknown").replace(" ", "_")
filename = f"regen_{niche}_{timestamp}_{unique_id}.png"
r2_url = None
try:
from services.r2_storage import get_r2_storage
r2_storage = get_r2_storage()
if r2_storage and image_bytes:
r2_url = r2_storage.upload_image(image_bytes=image_bytes, filename=filename, niche=niche)
except Exception as e:
api_logger.warning("R2 upload failed: %s", e)
local_path = None
# Always save locally when we have bytes so /images/{filename} works as fallback
# (avoids ERR_HTTP2_SERVER_REFUSED_STREAM when R2 presigned URL fails in browser)
if image_bytes:
local_path = os.path.join(settings.output_dir, filename)
os.makedirs(os.path.dirname(local_path), exist_ok=True)
with open(local_path, "wb") as f:
f.write(image_bytes)
original_image_url = ad.get("r2_url") or ad.get("image_url")
new_image_url = r2_url or generated_url or f"/images/{filename}"
if request.preview_only:
return {
"status": "success",
"regenerated_image": {
"filename": filename,
"filepath": local_path,
"image_url": new_image_url,
"r2_url": r2_url,
"model_used": model_used,
"prompt_used": image_prompt,
"seed_used": seed,
},
"original_image_url": original_image_url,
"original_preserved": True,
"is_preview": True,
}
regeneration_metadata = {
"is_regenerated": True,
"regeneration_date": datetime.utcnow().isoformat() + "Z",
"regeneration_seed": seed,
}
if original_image_url:
regeneration_metadata["original_image_url"] = original_image_url
for k, v in [("original_r2_url", ad.get("r2_url")), ("original_image_filename", ad.get("image_filename")), ("original_image_model", ad.get("image_model")), ("original_seed", ad.get("image_seed"))]:
if v is not None:
regeneration_metadata[k] = v
update_kwargs = {"image_filename": filename, "image_model": model_used, "image_seed": seed}
if r2_url:
update_kwargs["image_url"] = update_kwargs["r2_url"] = r2_url
elif generated_url:
update_kwargs["image_url"] = generated_url
elif local_path:
update_kwargs["image_url"] = f"/images/{filename}"
await db_service.update_ad_creative(
ad_id=request.image_id,
username=username,
metadata=regeneration_metadata,
**update_kwargs,
)
return {
"status": "success",
"regenerated_image": {
"filename": filename,
"filepath": local_path,
"image_url": new_image_url,
"r2_url": r2_url,
"model_used": model_used,
"prompt_used": image_prompt,
"seed_used": seed,
},
"original_image_url": original_image_url,
"original_preserved": True,
"is_preview": False,
}
except HTTPException:
raise
except Exception as e:
api_logger.exception("Regeneration failed")
raise HTTPException(status_code=500, detail=str(e))
@router.post("/api/regenerate/confirm")
async def confirm_image_selection(
request: ImageSelectionRequest,
username: str = Depends(get_current_user),
):
"""
Confirm the user's image selection after regeneration preview.
selection='new' updates the ad with the new image; selection='original' keeps original.
"""
if request.selection not in ["new", "original"]:
raise HTTPException(status_code=400, detail="Selection must be 'new' or 'original'")
ad = await db_service.get_ad_creative(request.image_id, username=username)
if not ad:
raise HTTPException(status_code=404, detail="Ad creative not found or access denied")
if request.selection == "original":
return {"status": "success", "message": "Original image kept", "selection": "original"}
if not request.new_image_url:
raise HTTPException(status_code=400, detail="new_image_url is required when selection='new'")
regeneration_metadata = {
"is_regenerated": True,
"regeneration_date": datetime.utcnow().isoformat() + "Z",
"regeneration_seed": request.new_seed,
}
for k, v in [
("original_image_url", ad.get("r2_url") or ad.get("image_url")),
("original_r2_url", ad.get("r2_url")),
("original_image_filename", ad.get("image_filename")),
("original_image_model", ad.get("image_model")),
("original_seed", ad.get("image_seed")),
]:
if v is not None:
regeneration_metadata[k] = v
update_kwargs = {}
if request.new_filename:
update_kwargs["image_filename"] = request.new_filename
if request.new_model:
update_kwargs["image_model"] = request.new_model
if request.new_seed is not None:
update_kwargs["image_seed"] = request.new_seed
if request.new_r2_url:
update_kwargs["image_url"] = update_kwargs["r2_url"] = request.new_r2_url
elif request.new_image_url:
update_kwargs["image_url"] = request.new_image_url
update_success = await db_service.update_ad_creative(
ad_id=request.image_id,
username=username,
metadata=regeneration_metadata,
**update_kwargs,
)
if not update_success:
raise HTTPException(status_code=500, detail="Failed to update ad with new image")
return {"status": "success", "message": "New image saved", "selection": "new", "new_image_url": request.new_image_url}
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