from flask import Flask, render_template_string, request, jsonify
import random
app = Flask(__name__)
class ChatBot:
def __init__(self, name="Sophia"):
self.name = name
self.responses = {
"greeting": [
"Hey there! 👋",
"Hello, how’s your day going?",
"Hi! What’s on your mind?"
],
"farewell": [
"Goodbye 👋",
"Catch you later!",
"See you soon!"
],
"default": [
"Interesting… tell me more.",
"Hmm, I see. Go on.",
"That’s something to think about."
]
}
def understand(self, user_input):
text = user_input.lower()
if any(word in text for word in ["hi", "hello", "hey"]):
return "greeting"
elif any(word in text for word in ["bye", "goodnight", "see you"]):
return "farewell"
else:
return "default"
def respond(self, user_input):
intent = self.understand(user_input)
return random.choice(self.responses[intent])
bot = ChatBot("Sophia")
# ---------------- HTML Template ----------------
page = """
{{ bot_name }} ChatBot
{{ bot_name }} 🤖
{{ bot_name }}: Hi! I'm {{ bot_name }}. Type 'quit' to end.
"""
# ---------------- Routes ----------------
@app.route("/")
def home():
return render_template_string(page, bot_name=bot.name)
@app.route("/chat", methods=["POST"])
def chat():
user_msg = request.json.get("message", "")
if user_msg.lower() in ["quit", "exit"]:
reply = "It was nice chatting with you. Bye!"
else:
reply = bot.respond(user_msg)
return jsonify({"reply": reply})
if __name__ == "__main__":
app.run(host="0.0.0.0", port=5000)