import os
import requests
from image_api_utils import (
    IMAGE_API_BASE_URL,
    API_KEY,
    AWS_BUCKET_NAME,
    get_auth_headers,
    upload_file_to_s3 as base_upload_file_to_s3,
    delete_file_from_s3 as base_delete_file_from_s3,
    poll_task_status,
    download_image,
    run_media_generation_pipeline
)

# Kept for backward compatibility
GPT_IMAGE_API_BASE_URL = os.getenv("IMAGE_API_BASE_URL") or os.getenv("GPT_IMAGE_API_BASE_URL") or IMAGE_API_BASE_URL

def upload_file_to_s3(local_path, bucket=None, key=None):
    """
    Upload a local file to S3 (kept for backward compatibility).
    """
    s3_url, _ = base_upload_file_to_s3(local_path, bucket=bucket, key=key)
    return s3_url

def delete_file_from_s3(bucket=None, key=None):
    """
    Cleans up temporary file from S3 (kept for backward compatibility).
    """
    base_delete_file_from_s3(bucket=bucket, key=key)

def generate_image(s3_urls, prompt):
    """
    Triggers the image-to-image task using the gpt-image-2 model.
    """
    url = f"{IMAGE_API_BASE_URL}/v1/media/generate"
    payload = {
        "model": "gpt-image-2",
        "params": {
            "aspect_ratio": "1:1",
            "images": s3_urls,
            "n": 1,
            "quality": "high",
            "resolution": "1K",
            "response_format": "url",
            "size": "1024x1024"
        },
        "prompt": prompt
    }
    
    headers = get_auth_headers(api_key=API_KEY)
    print(f"[*] Sending image generation request to: {url}")
    response = requests.post(url, json=payload, headers=headers)
    response.raise_for_status()
    res_json = response.json()
    
    # Try parsing task_id from root or nested "data" dictionary
    task_id = res_json.get("task_id")
    if not task_id and "data" in res_json and isinstance(res_json["data"], dict):
        task_id = res_json["data"].get("task_id")
        
    if not task_id:
        raise ValueError(f"Failed to obtain task_id from response: {res_json}")
    print(f"[+] Task created successfully. Task ID: {task_id}")
    return task_id

def generate_img2img(local_image_paths, prompt, output_path=None):
    """
    High-level API that handles S3 uploads, task submission, status polling, downloading, and cleanup.
    """
    def task_fn(s3_urls):
        return generate_image(s3_urls, prompt)
        
    return run_media_generation_pipeline(
        generate_task_fn=task_fn,
        local_image_paths=local_image_paths,
        output_path=output_path,
        default_prefix="result"
    )