"""
NLP Text Analysis Bot
Main application file for the NLP Text Analysis Bot

Developer: RSK World
Website: https://rskworld.in
Email: help@rskworld.in
Phone: +91 93305 39277
Year: 2026
"""

from flask import Flask, render_template, request, jsonify
from nlp_pipeline import NLPPipeline
from text_similarity import TextSimilarityCalculator
import json

app = Flask(__name__)
nlp_pipeline = NLPPipeline()
similarity_calculator = TextSimilarityCalculator()

@app.route('/')
def index():
    """
    Main page route
    Developer: RSK World - https://rskworld.in
    """
    return render_template('index.html')

@app.route('/api/analyze', methods=['POST'])
def analyze_text():
    """
    API endpoint for text analysis
    Developer: RSK World - https://rskworld.in
    """
    try:
        if not request.is_json:
            return jsonify({'error': 'Content-Type must be application/json'}), 400
        
        data = request.get_json()
        if not data:
            return jsonify({'error': 'No JSON data provided'}), 400
        
        text = data.get('text', '')
        
        if not text or not isinstance(text, str):
            return jsonify({'error': 'No text provided or invalid text format'}), 400
        
        if len(text.strip()) < 1:
            return jsonify({'error': 'Text cannot be empty'}), 400
        
        # Run complete NLP analysis
        results = nlp_pipeline.analyze(text)
        
        # Check if analysis returned an error
        if 'error' in results:
            return jsonify(results), 400
        
        return jsonify(results)
    except Exception as e:
        return jsonify({'error': f'Server error: {str(e)}'}), 500

@app.route('/api/similarity', methods=['POST'])
def calculate_similarity():
    """
    API endpoint for text similarity calculation
    Developer: RSK World - https://rskworld.in
    """
    try:
        if not request.is_json:
            return jsonify({'error': 'Content-Type must be application/json'}), 400
        
        data = request.get_json()
        if not data:
            return jsonify({'error': 'No JSON data provided'}), 400
        
        text1 = data.get('text1', '')
        text2 = data.get('text2', '')
        
        if not text1 or not text2:
            return jsonify({'error': 'Both text1 and text2 are required'}), 400
        
        if not isinstance(text1, str) or not isinstance(text2, str):
            return jsonify({'error': 'Both text1 and text2 must be strings'}), 400
        
        # Calculate similarity
        results = similarity_calculator.calculate_all_similarities(text1, text2)
        
        return jsonify(results)
    except Exception as e:
        return jsonify({'error': f'Server error: {str(e)}'}), 500

@app.route('/api/health', methods=['GET'])
def health():
    """
    Health check endpoint
    Developer: RSK World - https://rskworld.in
    """
    return jsonify({'status': 'healthy', 'service': 'NLP Text Analysis Bot'})

if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0', port=5000)