import base64
import io
from io import BytesIO
from fastapi import APIRouter, Depends, FastAPI, HTTPException, Request, Response
from modules.api.models import *
from PIL import PngImagePlugin,Image
import piexif
import piexif.helper


def decode_base64_to_image(encoding):
    if encoding.startswith("data:image/"):
        encoding = encoding.split(";")[1].split(",")[1]
    try:
        image = Image.open(BytesIO(base64.b64decode(encoding)))
        return image
    except Exception as err:
        raise HTTPException(status_code=500, detail="Invalid encoded image")

def encode_pil_to_base64(image):
    with io.BytesIO() as output_bytes:

        if opts.samples_format.lower() == 'png':
            use_metadata = False
            metadata = PngImagePlugin.PngInfo()
            for key, value in image.info.items():
                if isinstance(key, str) and isinstance(value, str):
                    metadata.add_text(key, value)
                    use_metadata = True
            image.save(output_bytes, format="PNG", pnginfo=(metadata if use_metadata else None), quality=opts.jpeg_quality)

        elif opts.samples_format.lower() in ("jpg", "jpeg", "webp"):
            parameters = image.info.get('parameters', None)
            exif_bytes = piexif.dump({
                "Exif": { piexif.ExifIFD.UserComment: piexif.helper.UserComment.dump(parameters or "", encoding="unicode") }
            })
            if opts.samples_format.lower() in ("jpg", "jpeg"):
                image.save(output_bytes, format="JPEG", exif = exif_bytes, quality=opts.jpeg_quality)
            else:
                image.save(output_bytes, format="WEBP", exif = exif_bytes, quality=opts.jpeg_quality)

        else:
            raise HTTPException(status_code=500, detail="Invalid image format")

        bytes_data = output_bytes.getvalue()

    return base64.b64encode(bytes_data)