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# app.py
import os
from datetime import datetime
from typing import Optional
from flask import Flask, render_template
# Your existing config and core logic
from src.config import AppConfig
from src.hn_mood_reader import HnMoodReader, FeedEntry
# --- Flask App Initialization ---
app = Flask(__name__)
# --- Global Cache for the Model ---
global_reader: Optional[HnMoodReader] = None
def initialize_reader() -> HnMoodReader:
"""
Initializes the HnMoodReader instance. This function is called once
when the application starts.
"""
print("Attempting to initialize the mood reader model...")
model_name = os.environ.get("MOOD_MODEL", AppConfig.DEFAULT_MOOD_READER_MODEL)
try:
reader = HnMoodReader(model_name=model_name)
print("Model loaded successfully.")
return reader
except Exception as e:
# If the model fails to load, print a fatal error and exit the app.
print(f"FATAL: Could not initialize model '{model_name}'. Error: {e}", file=sys.stderr)
sys.exit(1) # Exit with a non-zero code to indicate failure
# --- Initialize the reader as soon as the app starts ---
global_reader = initialize_reader()
# --- Flask Route ---
@app.route('/')
def index():
"""Main page route."""
try:
scored_entries = global_reader.fetch_and_score_feed()
return render_template(
'index.html',
entries=scored_entries,
model_name=global_reader.model_name,
last_updated=datetime.now().strftime('%H:%M:%S')
)
except Exception as e:
# Render a simple error page if something goes wrong
return render_template('error.html', error=str(e)), 500
if __name__ == '__main__':
# Using debug=False is recommended for a stable display
# use_reloader=False prevents the app from initializing the model twice in debug mode
app.run(host='0.0.0.0', port=5000, debug=False, use_reloader=False)
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