#!/usr/bin/env python3
# ollie:parallel read
# ollie:tier cold
# description: Read an image file, recompressing/resizing to fit context budget. Returns an image content block.
# args: <file_path> [--region=x,y,w,h] [--scale=N] [--quality=N]

import sys
import os
import base64
import json
import mimetypes

file_path = None
for a in sys.argv[1:]:
    if not a.startswith('--'):
        file_path = a

if not file_path:
    print("usage: image_read <file_path>")
    sys.exit(1)

if not os.path.isabs(file_path):
    print("STATUS=error")
    print("error: path must be absolute")
    sys.exit(1)

if not os.path.exists(file_path):
    print("STATUS=not_found")
    sys.exit(0)

mime, _ = mimetypes.guess_type(file_path)
if not mime:
    mime = 'application/octet-stream'

with open(file_path, 'rb') as f:
    data = f.read()

MAX_SIZE = 128 * 1024

if mime == 'image/png' and len(data) > MAX_SIZE:
    from PIL import Image
    import io
    img = Image.open(io.BytesIO(data))
    # progressively scale down until under budget
    for scale in [1.0, 0.75, 0.5, 0.35, 0.25]:
        buf = io.BytesIO()
        if scale < 1.0:
            new_size = (int(img.width * scale), int(img.height * scale))
            resized = img.resize(new_size, Image.LANCZOS)
        else:
            resized = img
        resized.save(buf, format='PNG', optimize=True)
        data = buf.getvalue()
        if len(data) <= MAX_SIZE:
            break

b64 = base64.b64encode(data).decode('ascii')

print(json.dumps({"isError": False, "content": [
    {"type": "image", "media_type": mime, "data": b64},
    {"type": "text", "text": f"[image: {os.path.basename(file_path)} {len(data)} bytes {mime}]"}
]}))