import requests
import cv2
import numpy as np
from datetime import datetime
from pathlib import Path
import logging
import base64
import io
import json

logger = logging.getLogger(__name__)


class DiscordAlertManager:
    """Manages Discord webhook alerts for hygiene violations."""
    
    def __init__(self, discord_config: dict):
        """
        discord_config: {
            'webhook_url': 'your_webhook_url'
        }
        """
        self.webhook_url = discord_config['webhook_url']
        self.alert_cooldown = 300
        self.last_alert_time = None
        self.dirty_start_time = None
        self.dirty_threshold_seconds = 10
        self.dirty_coverage_threshold = 0.06
        
    def should_send_alert(self, dirty_coverage: float, current_time: datetime) -> bool:
        """Same logic as before"""
        if dirty_coverage < self.dirty_coverage_threshold:
            self.dirty_start_time = None
            return False
        
        if self.dirty_start_time is None:
            self.dirty_start_time = current_time
            return False
        
        dirty_duration = (current_time - self.dirty_start_time).total_seconds()
        if dirty_duration < self.dirty_threshold_seconds:
            return False
        
        if self.last_alert_time is not None:
            time_since_last = (current_time - self.last_alert_time).total_seconds()
            if time_since_last < self.alert_cooldown:
                return False
        
        return True
    
    def generate_heatmap_image(self, frame: np.ndarray, gmm_heatmap: np.ndarray, 
                              output_path: str) -> str:
        """Generate heatmap visualization"""
        result = frame.copy()
        height, width = result.shape[:2]
        
        if gmm_heatmap.shape != (height, width):
            heatmap_resized = cv2.resize(gmm_heatmap, (width, height))
        else:
            heatmap_resized = gmm_heatmap
        
        heatmap_colored = cv2.applyColorMap(
            (heatmap_resized * 255).astype(np.uint8),
            cv2.COLORMAP_JET
        )
        
        alpha = 0.5
        result = cv2.addWeighted(frame, 1 - alpha, heatmap_colored, alpha, 0)
        
        # Add info panel
        avg_dirt = np.mean(heatmap_resized)
        max_dirt = np.max(heatmap_resized)
        dirty_pixels = np.sum(heatmap_resized > 0.60)
        coverage_percent = (dirty_pixels / heatmap_resized.size) * 100
        
        cv2.rectangle(result, (10, 10), (400, 120), (0, 0, 0), -1)
        cv2.rectangle(result, (10, 10), (400, 120), (255, 255, 255), 2)
        
        info_text = [
            f"Average Dirt: {avg_dirt:.2f}",
            f"Maximum Dirt: {max_dirt:.2f}",
            f"Red Zone: {coverage_percent:.1f}%",
            f"Time: {datetime.now().strftime('%H:%M:%S')}"
        ]
        
        for i, text in enumerate(info_text):
            cv2.putText(result, text, (20, 35 + i * 25),
                       cv2.FONT_HERSHEY_SIMPLEX, 0.6, (255, 255, 255), 1)
        
        cv2.imwrite(output_path, result)
        return output_path
    
    def send_alert(self, camera_name: str, dirty_coverage: float, 
              dirty_duration: int, frame: np.ndarray, 
              gmm_heatmap: np.ndarray) -> bool:
        """Send Discord webhook alert with embedded image"""
        try:
            # Generate image
            temp_image_path = f"tmp/heatmap_{datetime.now().timestamp()}.png"
            self.generate_heatmap_image(frame, gmm_heatmap, temp_image_path)
            
            # Calculate duration
            duration_mins = dirty_duration // 60
            duration_secs = dirty_duration % 60
            
            # Create rich embed
            embed = {
                "title": "🚨 CLEANING ALERT",
                "description": f"**{camera_name}** requires immediate attention!",
                "color": 15158332,  # Red color (#E74C3C)
                "fields": [
                    {
                        "name": "📍 Location",
                        "value": camera_name,
                        "inline": True
                    },
                    {
                        "name": "🔴 Coverage",
                        "value": f"{dirty_coverage*100:.1f}%",
                        "inline": True
                    },
                    {
                        "name": "⏱ Duration",
                        "value": f"{duration_mins}m {duration_secs}s",
                        "inline": True
                    },
                    {
                        "name": "⚠️ Action Required",
                        "value": "Table has exceeded cleanliness threshold and needs cleaning.",
                        "inline": False
                    }
                ],
                "footer": {
                    "text": "Kitchen Hygiene Monitoring System"
                },
                "timestamp": datetime.utcnow().isoformat()
            }
            
            # Prepare webhook payload with embeds
            payload = {
                "username": "Hygiene Monitor Bot",
                "avatar_url": "https://cdn-icons-png.flaticon.com/512/3699/3699516.png",
                "embeds": [embed]
            }
            
            # Read the image file
            with open(temp_image_path, 'rb') as f:
                image_data = f.read()
            
            # Prepare the multipart form data
            files = {
                'payload_json': (None, json.dumps(payload), 'application/json'),
                'file': ('heatmap.png', image_data, 'image/png')
            }
            
            # Send the request
            response = requests.post(self.webhook_url, files=files)
            
            if response.status_code in [200, 204]:
                self.last_alert_time = datetime.now()
                logger.info(f"✅ Discord alert sent for {camera_name}")
                Path(temp_image_path).unlink(missing_ok=True)
                return True
            else:
                logger.error(f"Discord webhook error: {response.status_code} - {response.text}")
                return False
                
        except Exception as e:
            logger.error(f"Failed to send Discord alert: {str(e)}")
            import traceback
            logger.error(traceback.format_exc())
            return False