# gunicorn.conf.py — Gunicorn configuration for TechDJ
# Used by production.py. Do not run gunicorn directly without this file.
#
# Architecture:
#   - Gunicorn (eventlet worker, 1 worker) serves the DJ panel app on DJ_PORT.
#   - post_worker_init spawns the listener app on LISTENER_PORT and starts
#     background greenlets — all within the same worker process so they share
#     in-process state (SRT state, pre-roll buffer, queue, etc.).

import os
import json

# ── Load ports from config.json ──────────────────────────────────────────────
def _load_cfg():
    try:
        with open(os.path.join(os.path.dirname(__file__), 'config.json')) as f:
            return json.load(f)
    except Exception:
        return {}

_cfg = _load_cfg()

# ── Gunicorn settings ─────────────────────────────────────────────────────────
worker_class = 'eventlet'
workers      = 1          # Must be 1 — eventlet handles concurrency via greenlets
                          # and both apps share in-process state.
bind         = f"{_cfg.get('host', '0.0.0.0')}:{_cfg.get('dj_port', 5000)}"
timeout      = 0          # Disable worker timeout — long-lived SSE/WS connections.
keepalive    = 5

# Log format
accesslog    = '-'        # stdout — production.py redirects to techdj.log
errorlog     = '-'
loglevel     = 'info'


# ── Hooks ─────────────────────────────────────────────────────────────────────
def post_worker_init(worker):
    """Called after the eventlet worker is fully initialised.

    Starts the listener server + background greenlets in the same process
    as the DJ panel so they share all in-process state.
    """
    from server import _start_background_tasks
    _start_background_tasks()