"""
Combined URL+HTML Phishing Detector - Interactive Demo

Downloads HTML from URL, extracts both URL and HTML features,
and predicts using the combined model (XGBoost + Random Forest).

Usage:
    python scripts/predict_combined.py
    python scripts/predict_combined.py https://example.com
"""
import sys
import logging
import warnings
from pathlib import Path

import joblib
import numpy as np
import pandas as pd
import requests
from colorama import init, Fore, Style

warnings.filterwarnings('ignore', message='.*Unverified HTTPS.*')
import urllib3
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

init(autoreset=True)

logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(message)s',
    datefmt='%H:%M:%S',
)
logger = logging.getLogger('predict_combined')

# Project imports
PROJECT_ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(PROJECT_ROOT))

from scripts.feature_extraction.url.url_features_v3 import URLFeatureExtractorOptimized
from scripts.feature_extraction.html.html_feature_extractor import HTMLFeatureExtractor
from scripts.feature_extraction.html.feature_engineering import engineer_features


class CombinedPhishingDetector:
    """Detect phishing using combined URL + HTML features."""

    HEADERS = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) '
                       'AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
    }

    def __init__(self):
        models_dir = PROJECT_ROOT / 'saved_models'

        # Feature extractors
        self.url_extractor = URLFeatureExtractorOptimized()
        self.html_extractor = HTMLFeatureExtractor()

        # Load combined models
        self.models = {}
        self._load_model(models_dir, 'XGBoost Combined',
                         'xgboost_combined.joblib',
                         'xgboost_combined_feature_names.joblib')
        self._load_model(models_dir, 'Random Forest Combined',
                         'random_forest_combined.joblib',
                         'random_forest_combined_feature_names.joblib')

        if not self.models:
            raise FileNotFoundError(
                "No combined models found! Train first:\n"
                "  python scripts/merge_url_html_features.py --balance\n"
                "  python models/train_combined_models.py")

    def _load_model(self, models_dir: Path, name: str,
                    model_file: str, features_file: str):
        model_path = models_dir / model_file
        feat_path = models_dir / features_file
        if model_path.exists():
            self.models[name] = {
                'model': joblib.load(model_path),
                'features': joblib.load(feat_path) if feat_path.exists() else None,
            }
            n = len(self.models[name]['features']) if self.models[name]['features'] else '?'
            logger.info(f"Loaded {name} ({n} features)")

    def predict(self, url: str) -> dict:
        """Download HTML, extract features, predict."""
        # 1. Extract URL features
        url_features = self.url_extractor.extract_features(url)
        url_df = pd.DataFrame([url_features])
        url_df = url_df.rename(columns={c: f'url_{c}' for c in url_df.columns})

        # 2. Download + extract HTML features
        html_features = None
        html_error = None
        try:
            resp = requests.get(url, timeout=10, verify=False, headers=self.HEADERS)
            raw_html_features = self.html_extractor.extract_features(resp.text)
            raw_df = pd.DataFrame([raw_html_features])
            eng_df = engineer_features(raw_df)
            eng_df = eng_df.rename(columns={c: f'html_{c}' for c in eng_df.columns})
            html_features = raw_html_features
        except Exception as e:
            html_error = str(e)
            logger.warning(f"Could not download HTML: {e}")
            # Create zero-filled HTML features
            eng_df = pd.DataFrame()

        # 3. Combine
        combined_df = pd.concat([url_df, eng_df], axis=1)

        # 4. Predict with each model
        predictions = []
        for name, data in self.models.items():
            model = data['model']
            expected = data['features']

            if expected:
                aligned = pd.DataFrame(columns=expected)
                for f in expected:
                    aligned[f] = combined_df[f].values if f in combined_df.columns else 0
                X = aligned.values
            else:
                X = combined_df.values

            proba = model.predict_proba(X)[0]
            pred = 1 if proba[1] > 0.5 else 0

            predictions.append({
                'model_name': name,
                'prediction': 'PHISHING' if pred else 'LEGITIMATE',
                'confidence': float(proba[pred] * 100),
                'phishing_probability': float(proba[1] * 100),
                'legitimate_probability': float(proba[0] * 100),
            })

        # Consensus
        phishing_votes = sum(1 for p in predictions if p['prediction'] == 'PHISHING')
        total = len(predictions)
        is_phishing = phishing_votes > total / 2

        if phishing_votes == total:
            consensus = "ALL MODELS AGREE: PHISHING"
        elif phishing_votes == 0:
            consensus = "ALL MODELS AGREE: LEGITIMATE"
        else:
            consensus = f"MIXED: {phishing_votes}/{total} models say PHISHING"

        return {
            'url': url,
            'is_phishing': is_phishing,
            'consensus': consensus,
            'predictions': predictions,
            'url_features': url_features,
            'html_features': html_features,
            'html_error': html_error,
        }

    def print_results(self, result: dict):
        """Pretty-print results."""
        print("\n" + "=" * 80)
        print(f"{Fore.CYAN}{Style.BRIGHT}COMBINED URL+HTML PHISHING DETECTION{Style.RESET_ALL}")
        print("=" * 80)
        print(f"\n{Fore.YELLOW}URL:{Style.RESET_ALL} {result['url']}")

        if result.get('html_error'):
            print(f"{Fore.RED}HTML download failed: {result['html_error']}{Style.RESET_ALL}")
            print(f"{Fore.YELLOW}Using URL features only (HTML features zeroed){Style.RESET_ALL}")

        # Model predictions
        print(f"\n{Fore.CYAN}{Style.BRIGHT}MODEL PREDICTIONS:{Style.RESET_ALL}")
        print("-" * 80)

        for pred in result['predictions']:
            is_safe = pred['prediction'] == 'LEGITIMATE'
            color = Fore.GREEN if is_safe else Fore.RED
            icon = "✓" if is_safe else "⚠"

            print(f"\n{Style.BRIGHT}{pred['model_name']}:{Style.RESET_ALL}")
            print(f"  {icon} Prediction: {color}{Style.BRIGHT}{pred['prediction']}{Style.RESET_ALL}")
            print(f"  Confidence: {pred['confidence']:.1f}%")
            print(f"    Phishing:   {Fore.RED}{pred['phishing_probability']:6.2f}%{Style.RESET_ALL}")
            print(f"    Legitimate: {Fore.GREEN}{pred['legitimate_probability']:6.2f}%{Style.RESET_ALL}")

        # Consensus
        print(f"\n{Fore.CYAN}{Style.BRIGHT}CONSENSUS:{Style.RESET_ALL}")
        print("-" * 80)

        if result['is_phishing']:
            print(f"🚨 {Fore.RED}{Style.BRIGHT}{result['consensus']}{Style.RESET_ALL}")
        else:
            print(f"✅ {Fore.GREEN}{Style.BRIGHT}{result['consensus']}{Style.RESET_ALL}")

        # Key features
        url_feat = result.get('url_features', {})
        html_feat = result.get('html_features', {})

        print(f"\n{Fore.CYAN}{Style.BRIGHT}KEY URL FEATURES:{Style.RESET_ALL}")
        print("-" * 80)
        url_keys = [
            ('Domain Length', url_feat.get('domain_length', 0)),
            ('Num Subdomains', url_feat.get('num_subdomains', 0)),
            ('Domain Dots', url_feat.get('domain_dots', 0)),
            ('Is Shortened', 'Yes' if url_feat.get('is_shortened') else 'No'),
            ('Is Free Platform', 'Yes' if url_feat.get('is_free_platform') else 'No'),
            ('Is HTTP', 'Yes' if url_feat.get('is_http') else 'No'),
            ('Has @ Symbol', 'Yes' if url_feat.get('has_at_symbol') else 'No'),
        ]
        for name, val in url_keys:
            print(f"  {name:25s}: {val}")

        if html_feat:
            print(f"\n{Fore.CYAN}{Style.BRIGHT}KEY HTML FEATURES:{Style.RESET_ALL}")
            print("-" * 80)
            html_keys = [
                ('Text Length', html_feat.get('text_length', 0)),
                ('Num Links', html_feat.get('num_links', 0)),
                ('Num Forms', html_feat.get('num_forms', 0)),
                ('Password Fields', html_feat.get('num_password_fields', 0)),
                ('Has Login Form', 'Yes' if html_feat.get('has_login_form') else 'No'),
                ('Has Meta Refresh', 'Yes' if html_feat.get('has_meta_refresh') else 'No'),
                ('Has atob()', 'Yes' if html_feat.get('has_atob') else 'No'),
                ('External Links', html_feat.get('num_external_links', 0)),
            ]
            for name, val in html_keys:
                print(f"  {name:25s}: {val}")

        print("\n" + "=" * 80 + "\n")


def main():
    print(f"\n{Fore.CYAN}{Style.BRIGHT}")
    print("╔══════════════════════════════════════════════════════════════╗")
    print("║      COMBINED URL+HTML PHISHING DETECTOR                   ║")
    print("╚══════════════════════════════════════════════════════════════╝")
    print(f"{Style.RESET_ALL}")

    print(f"{Fore.YELLOW}Loading models...{Style.RESET_ALL}")
    detector = CombinedPhishingDetector()
    print(f"{Fore.GREEN}✓ Models loaded!{Style.RESET_ALL}\n")

    # Single URL from command line
    if len(sys.argv) > 1:
        url = sys.argv[1]
        if not url.startswith(('http://', 'https://')):
            url = 'https://' + url
        result = detector.predict(url)
        detector.print_results(result)
        return

    # Interactive loop
    while True:
        print(f"{Fore.CYAN}{'─' * 80}{Style.RESET_ALL}")
        url = input(f"{Fore.YELLOW}Enter URL (or 'quit'):{Style.RESET_ALL} ").strip()

        if url.lower() in ('quit', 'exit', 'q'):
            print(f"\n{Fore.GREEN}Goodbye!{Style.RESET_ALL}\n")
            break

        if not url:
            continue

        if not url.startswith(('http://', 'https://')):
            url = 'https://' + url

        try:
            result = detector.predict(url)
            detector.print_results(result)
        except Exception as e:
            print(f"\n{Fore.RED}Error: {e}{Style.RESET_ALL}\n")


if __name__ == '__main__':
    main()