import argparse
import io
import json
import logging
import os
import sys
import time
from typing import Optional

import requests


def configure_logging(verbose: bool) -> None:
	log_level = logging.DEBUG if verbose else logging.INFO
	logging.basicConfig(
		level=log_level,
		format="%(asctime)s - %(levelname)s - %(message)s"
	)


def get_base_url(cli_base_url: Optional[str]) -> str:
	if cli_base_url:
		return cli_base_url.rstrip("/")
	env_base = os.getenv("BASE_URL")
	if env_base:
		return env_base.rstrip("/")
	# Fallback to HF style URL if provided via POSTMAN collection, else localhost
	return "http://localhost:7860"


def wait_for_model(base_url: str, timeout_seconds: int = 300) -> None:
	deadline = time.time() + timeout_seconds
	health_url = f"{base_url}/health"
	logging.info("Waiting for model to load at %s", health_url)
	last_status = None
	headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"}
	while time.time() < deadline:
		try:
			resp = requests.get(health_url, headers=headers, timeout=15)
			if resp.ok:
				data = resp.json()
				last_status = data
				if data.get("model_loaded"):
					logging.info("Model loaded: %s", json.dumps(data))
					return
				logging.info("Health: %s", json.dumps(data))
			else:
				logging.warning("Health check HTTP %s", resp.status_code)
		except Exception as e:
			logging.warning("Health check error: %s", str(e))
		time.sleep(3)
	raise RuntimeError("Model did not load before timeout. Last health: %s" % (last_status,))


def upload_image(base_url: str, image_path: str, auth_bearer: Optional[str], app_check: Optional[str]) -> dict:
	url = f"{base_url}/upload"
	headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"}
	if auth_bearer:
		headers["Authorization"] = f"Bearer {auth_bearer}"
	if app_check:
		headers["X-Firebase-AppCheck"] = app_check
	with open(image_path, "rb") as f:
		files = {"file": (os.path.basename(image_path), f, "image/jpeg")}
		resp = requests.post(url, files=files, headers=headers, timeout=120)
	if not resp.ok:
		raise RuntimeError("Upload failed: HTTP %s %s" % (resp.status_code, resp.text))
	data = resp.json()
	logging.info("Upload response: %s", json.dumps(data))
	return data


def colorize_image(base_url: str, image_path: str, auth_bearer: Optional[str], app_check: Optional[str]) -> dict:
	url = f"{base_url}/colorize"
	headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"}
	if auth_bearer:
		headers["Authorization"] = f"Bearer {auth_bearer}"
	if app_check:
		headers["X-Firebase-AppCheck"] = app_check
	with open(image_path, "rb") as f:
		files = {"file": (os.path.basename(image_path), f, "image/jpeg")}
		resp = requests.post(url, files=files, headers=headers, timeout=900)
	if not resp.ok:
		raise RuntimeError("Colorize failed: HTTP %s %s" % (resp.status_code, resp.text))
	data = resp.json()
	logging.info("Colorize response: %s", json.dumps(data))
	return data


def download_result(base_url: str, result_id: str, output_path: str, auth_bearer: Optional[str], app_check: Optional[str]) -> None:
	url = f"{base_url}/download/{result_id}"
	headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"}
	if auth_bearer:
		headers["Authorization"] = f"Bearer {auth_bearer}"
	if app_check:
		headers["X-Firebase-AppCheck"] = app_check
	resp = requests.get(url, headers=headers, stream=True, timeout=300)
	if not resp.ok:
		raise RuntimeError("Download failed: HTTP %s %s" % (resp.status_code, resp.text))
	with open(output_path, "wb") as out:
		for chunk in resp.iter_content(chunk_size=8192):
			if chunk:
				out.write(chunk)
	logging.info("Saved colorized image to: %s", output_path)


def main() -> int:
	parser = argparse.ArgumentParser(description="End-to-end test for Colorize API")
	parser.add_argument("--base-url", type=str, help="API base URL, e.g. https://<space>.hf.space")
	parser.add_argument("--image", type=str, required=True, help="Path to input image")
	parser.add_argument("--out", type=str, default="colorized_result.jpg", help="Path to save colorized image")
	parser.add_argument("--auth", type=str, default=os.getenv("ID_TOKEN", ""), help="Optional Firebase id_token")
	parser.add_argument("--app-check", type=str, default=os.getenv("APP_CHECK_TOKEN", ""), help="Optional App Check token")
	parser.add_argument("--skip-wait", action="store_true", help="Skip waiting for model to load")
	parser.add_argument("--verbose", action="store_true", help="Verbose logging")
	args = parser.parse_args()

	configure_logging(args.verbose)
	base_url = get_base_url(args.base_url)
	image_path = args.image

	if not os.path.exists(image_path):
		logging.error("Image not found: %s", image_path)
		return 1

	if not args.skip_wait:
		try:
			wait_for_model(base_url, timeout_seconds=600)
		except Exception as e:
			logging.warning("Continuing despite health wait failure: %s", str(e))

	auth_bearer = args.auth.strip() or None
	app_check = args.app_check.strip() or None

	try:
		upload_resp = upload_image(base_url, image_path, auth_bearer, app_check)
	except Exception as e:
		logging.error("Upload error: %s", str(e))
		return 1

	try:
		colorize_resp = colorize_image(base_url, image_path, auth_bearer, app_check)
	except Exception as e:
		logging.error("Colorize error: %s", str(e))
		return 1

	result_id = colorize_resp.get("result_id")
	if not result_id:
		logging.error("No result_id in response: %s", json.dumps(colorize_resp))
		return 1

	try:
		download_result(base_url, result_id, args.out, auth_bearer, app_check)
	except Exception as e:
		logging.error("Download error: %s", str(e))
		return 1

	logging.info("Test workflow completed successfully.")
	return 0


if __name__ == "__main__":
	sys.exit(main())