import os

import requests
from image_api_utils import (
    IMAGE_API_BASE_URL,
    API_KEY,
    encode_json_request,
    get_auth_headers,
    poll_and_download_result,
    prepare_reference_images,
)

GPT_IMAGE_API_BASE_URL = (
    os.getenv("IMAGE_API_BASE_URL")
    or os.getenv("GPT_IMAGE_API_BASE_URL")
    or IMAGE_API_BASE_URL
)
MODEL_NAME = "gpt-image-2"


def generate_image(images, prompt):
    """
    Trigger a gpt-image-2 task using local paths, URLs, or base64 data URLs.
    """
    url = f"{GPT_IMAGE_API_BASE_URL}/v1/media/generate"
    reference_images = prepare_reference_images(images)
    payload = {
        "model": MODEL_NAME,
        "params": {
            "aspect_ratio": "1:1",
            "images": reference_images,
            "n": 1,
            "quality": "high",
            "resolution": "1K",
            "response_format": "url",
            "size": "1024x1024",
        },
        "prompt": prompt,
    }

    payload_body = encode_json_request(payload)
    headers = get_auth_headers(api_key=API_KEY)
    print(f"[*] Sending image generation request to: {url}")
    response = requests.post(url, data=payload_body, 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):
    """
    Generate an image using up to 14 local paths, URLs, or base64 data URLs.
    """
    task_id = generate_image(local_image_paths, prompt)
    return poll_and_download_result(
        task_id=task_id,
        output_path=output_path,
        default_prefix="result",
        api_base_url=GPT_IMAGE_API_BASE_URL,
        api_key=API_KEY,
    )