"""Tiny stand-in for the backend, for testing the app without a real connection.

Run:  python tools/mock_server.py
Then point the app at it:  $env:NOTIFIER_URL = "http://127.0.0.1:8000/internal/pull-notifications"

Every request gets the same answer: MESSAGE_COUNT messages and has_more=true.
Uses only the standard library.
"""

import json
import time
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer

HOST = "127.0.0.1"
PORT = 8000
PATH = "/internal/pull-notifications"
MESSAGE_COUNT = 10
HAS_MORE = True


def build_payload() -> dict:
	now = int(time.time())
	messages = [
		{
			"title": f"Test notification {i}",
			"body": f"Test message {i} of {MESSAGE_COUNT}",
			"category": "podcasts",
			"timestamp": now - (MESSAGE_COUNT - i),
			"link": "https://www.example.com",
		}
		for i in range(1, MESSAGE_COUNT + 1)
	]
	return {"messages": messages, "count": len(messages), "has_more": HAS_MORE}


class Handler(BaseHTTPRequestHandler):
	def _respond(self) -> None:
		if self.path != PATH:
			self.send_error(404)
			return
		body = json.dumps(build_payload()).encode()
		self.send_response(200)
		self.send_header("Content-Type", "application/json")
		self.send_header("Content-Length", str(len(body)))
		self.end_headers()
		self.wfile.write(body)

	def do_GET(self) -> None:
		self._respond()


if __name__ == "__main__":
	server = ThreadingHTTPServer((HOST, PORT), Handler)
	print(f"Mock server on http://{HOST}:{PORT}{PATH}  (Ctrl+C to stop)")
	try:
		server.serve_forever()
	except KeyboardInterrupt:
		pass
	finally:
		server.server_close()