"""Report generation for Tasmota devices."""

import logging
from typing import List, Dict, Optional
from datetime import datetime

from utils import get_data_file_path, save_json_file, format_device_info
from discovery import TasmotaDiscovery


class ReportGenerator:
    """Generates various reports for Tasmota devices."""
    
    def __init__(self, config: dict, discovery: TasmotaDiscovery,
                 logger: Optional[logging.Logger] = None):
        """
        Initialize report generator.
        
        Args:
            config: Configuration dictionary
            discovery: Discovery handler instance
            logger: Optional logger instance
        """
        self.config = config
        self.discovery = discovery
        self.logger = logger or logging.getLogger(__name__)
    
    def generate_unifi_hostname_report(self) -> Dict:
        """
        Generate a report comparing UniFi and Tasmota hostnames.
        
        Returns:
            dict: Report data
        """
        self.logger.info("Generating UniFi hostname report")
        
        devices = self.discovery.get_tasmota_devices()
        
        report = {
            'generated_at': datetime.now().isoformat(),
            'total_devices': len(devices),
            'devices': []
        }
        
        for device in devices:
            device_ip = device.get('ip', '')
            device_name = device.get('name', 'Unknown')
            unifi_hostname = device.get('hostname', '')
            
            # Get self-reported hostname
            tasmota_hostname, success = self.discovery.get_device_hostname(
                device_ip, device_name, timeout=5
            )
            
            device_report = {
                'name': device_name,
                'ip': device_ip,
                'mac': device.get('mac', ''),
                'unifi_hostname': unifi_hostname,
                'tasmota_hostname': tasmota_hostname if success else 'N/A',
                'hostnames_match': tasmota_hostname == unifi_hostname if success else False,
                'connection': device.get('connection', 'Unknown'),
                'bug_detected': device.get('unifi_hostname_bug_detected', False)
            }
            
            report['devices'].append(device_report)
        
        # Save report
        report_file = get_data_file_path('TasmotaHostnameReport.json')
        save_json_file(report_file, report, self.logger)
        
        # Print summary
        self._print_hostname_report_summary(report)
        
        return report
    
    def _print_hostname_report_summary(self, report: Dict):
        """
        Print a summary of the hostname report.
        
        Args:
            report: Report data dictionary
        """
        print(f"\n{'='*70}")
        print("UniFi vs Tasmota Hostname Report")
        print(f"{'='*70}")
        print(f"Total devices: {report['total_devices']}")
        print(f"Generated: {report['generated_at']}")
        print(f"{'='*70}\n")
        
        mismatches = 0
        bug_detected = 0
        
        for device in report['devices']:
            if not device['hostnames_match']:
                mismatches += 1
            if device['bug_detected']:
                bug_detected += 1
        
        print(f"Hostname mismatches: {mismatches}")
        print(f"UniFi bug detected: {bug_detected}")
        print(f"\n{'='*70}")
        
        if mismatches > 0:
            print("\nDevices with hostname mismatches:")
            print(f"{'Device':<25} {'UniFi Hostname':<25} {'Tasmota Hostname':<25}")
            print("-" * 75)
            
            for device in report['devices']:
                if not device['hostnames_match']:
                    name = device['name'][:24]
                    unifi = device['unifi_hostname'][:24]
                    tasmota = device['tasmota_hostname'][:24]
                    bug = " [BUG]" if device['bug_detected'] else ""
                    print(f"{name:<25} {unifi:<25} {tasmota:<25}{bug}")
        
        print(f"\n{'='*70}\n")
    
    def save_device_details(self, device_details: List[Dict]):
        """
        Save detailed device information to file.
        
        Args:
            device_details: List of detailed device info dictionaries
        """
        output_file = get_data_file_path('TasmotaDevices.json')
        
        # Add metadata
        output = {
            'generated_at': datetime.now().isoformat(),
            'total_devices': len(device_details),
            'devices': device_details
        }
        
        save_json_file(output_file, output, self.logger)
        self.logger.info(f"Saved details for {len(device_details)} devices")
    
    def print_processing_summary(self, processed: int, mqtt_updated: int, 
                                console_updated: int, failed: int):
        """
        Print summary of processing results.
        
        Args:
            processed: Number of devices processed
            mqtt_updated: Number with MQTT updates
            console_updated: Number with console updates
            failed: Number that failed
        """
        print(f"\n{'='*60}")
        print("Processing Summary")
        print(f"{'='*60}")
        print(f"Total devices processed: {processed}")
        print(f"MQTT settings updated: {mqtt_updated}")
        print(f"Console settings applied: {console_updated}")
        print(f"Failed: {failed}")
        print(f"{'='*60}\n")