app.py

import os
import json
from flask import Flask, jsonify, request, send_file, send_from_directory
from langchain_core.messages import HumanMessage
from langchain_google_genai import ChatGoogleGenerativeAI
import assemblyai as aai
from dotenv import load_dotenv

# Load environment variables from the .env file
load_dotenv()

# Initialize the Flask app
app = Flask(__name__)

# Get API keys from environment variables
ASSEMBLYAI_API_KEY = os.getenv("ASSEMBLYAI_API_KEY").strip()
GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY").strip()

# Set AssemblyAI API key
aai.settings.api_key = ASSEMBLYAI_API_KEY

# Set Google API key for Gemini model
os.environ["GOOGLE_API_KEY"] = GOOGLE_API_KEY

# Define a directory to save uploaded audio files
UPLOAD_FOLDER = 'uploads'
os.makedirs(UPLOAD_FOLDER, exist_ok=True)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

# Refined Instructions for Gemini
GEMINI_INSTRUCTIONS = """
The purpose of this classification is to determine whether a caller has agreed to visit the dealership at a specific time or within a certain time range.

### Option 1: (Yes, at a specific time or range of time within 1 hour):
A call falls into this category if the caller explicitly agrees to visit the dealership at a specific time or within a one-hour range.

#### Criteria:
- Caller explicitly mentions a specific time (e.g., "I'll be there at 4:00").
- Caller gives an estimated arrival time within a one-hour range (e.g., "I'll be there in 30 minutes").
- Caller provides a loose time range, but the agent confirms a firm time (e.g., Caller: "Between 6:00 and 8:00," Agent: "I'll put you down for 7:00").
- Caller is already on the dealership lot (walk-in).

#### Examples (Accepted for this Option):
- "I'm going to come in and take a look at 4:00."
- "I'll stop by around 3:00 on Saturday."
- "I'll try to go test drive it at noon."
- "I'm on my way right now, and I'll be there in just a few minutes."
- "I'll come down in 30 minutes if it's still on the lot."
- "I'll be there in about 45-60 minutes."

#### Not Considered Specific (Excluded from this Option):
- "I'll come after 4:00" (since the arrival time is unknown, it could be anytime after 4 PM).
- "I'll be at the dealership till 4 PM" (caller could arrive anytime before 4 PM).
- "I'll be there between 7:00 and 9:00" (exceeds a one-hour range).

---

### Option 2: (Yes, at a loose time or range of time exceeding 1 hour):
A call falls into this Option if the caller expresses an intention to visit but does not provide a specific or one-hour time range.

#### Criteria:
- Caller agrees to visit but gives a broad time frame (longer than one hour).
- Caller uses vague terms such as "sometime today" or "this evening."
- Caller mentions visiting based on a conditional factor (e.g., "If I get off work early, I'll stop in").

#### Examples (Accepted for this category):
- "I'll stop by sometime today."
- "My wife will go there Saturday."
- "I might be there to test drive it this evening."
- "I get off work at 5:00, and I'll come by after that."
- "I'll be there tonight between 7:00 and 9:00."
- "Maybe I'll come take a look at it later."
- "If I get off work early, I'll stop in."

---
### Option 3: 
if call didnot fall in option 1 or option2 then select option 3

### Classification Logic Summary:
1. If the caller specifies an exact time or an estimated arrival time within one hour → **optiony 1 (Specific time or within 1 hour).**
2. If the caller provides a time range longer than one hour or speaks vaguely about their visit → **Option 2 (Loose time or exceeding 1 hour).**

Based on this classification, return the appropriate option from:
- **Option 1**: Specific time or within 1 hour.
- **Option 2**: Loose time or exceeding 1 hour.


"""

# Home route to serve the index.html file from the root directory
@app.route('/')
def home():
    return send_file('index.html')

# API route to handle file upload, transcription, and model interaction
@app.route("/api/upload", methods=["POST"])
def generate_api():
    if request.method == "POST":
        try:
            # Check if an audio file was uploaded
            if 'audio_file' not in request.files:
                return jsonify({"error": "No audio file provided"}), 400

            audio_file = request.files['audio_file']
            if audio_file.filename == '':
                return jsonify({"error": "No selected file"}), 400

            # Save the uploaded file to the server
            file_path = os.path.join(app.config['UPLOAD_FOLDER'], audio_file.filename)
            audio_file.save(file_path)

            # Transcribe the audio using AssemblyAI
            transcriber = aai.Transcriber()
            transcript = transcriber.transcribe(file_path)

            # Send transcription and instructions to Gemini model
            model = ChatGoogleGenerativeAI(model="gemini-1.5-flash-002")
            message = HumanMessage(content=f"{GEMINI_INSTRUCTIONS}\n\nCall Transcription: {transcript.text}")
            response = model.stream([message])

            # Interpret the model's response to select the correct option
            buffer = []
            for chunk in response:
                buffer.append(chunk.content)

            result_text = ''.join(buffer).lower()

            options = {'option 1': 1,'option 2': 2,'option 3':3, 'option 4':4};
    
            for option in options:
                if option in result_text:
                    selected_option = options[option]
                    break 

            # Return the transcription and selected option
            return jsonify({
                "transcription": transcript.text,
                "selected_option": selected_option
            }), 200

        except Exception as e:
            return jsonify({"error": str(e)})

# Route to serve static files
@app.route('/<path:path>')
def serve_static(path):
    return send_from_directory('.', path)

# Run the Flask application
if __name__ == '__main__':
    app.run(debug=True)