"""
Analysis Synthesizer - Result Aggregation and Synthesis
Combines outputs from multiple specialized models
"""

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

logger = logging.getLogger(__name__)


class AnalysisSynthesizer:
    """
    Synthesizes results from multiple specialized models into
    a comprehensive medical document analysis
    
    Implements:
    - Result aggregation
    - Conflict resolution
    - Confidence calibration
    - Clinical insights generation
    """
    
    def __init__(self):
        self.fusion_strategies = {
            "early": self._early_fusion,
            "late": self._late_fusion,
            "weighted": self._weighted_fusion
        }
        logger.info("Analysis Synthesizer initialized")
    
    async def synthesize(
        self,
        classification: Dict[str, Any],
        specialized_results: List[Dict[str, Any]],
        pdf_content: Dict[str, Any]
    ) -> Dict[str, Any]:
        """
        Synthesize results from multiple models
        
        Returns comprehensive analysis with:
        - Aggregated findings
        - Key insights
        - Recommendations
        - Risk assessment
        - Confidence scores
        """
        try:
            logger.info(f"Synthesizing {len(specialized_results)} model results")
            
            # Extract successful results
            successful_results = [
                r for r in specialized_results
                if r.get("status") == "completed"
            ]
            
            if not successful_results:
                return self._generate_fallback_analysis(classification, pdf_content)
            
            # Aggregate findings by domain
            aggregated_findings = self._aggregate_by_domain(successful_results)
            
            # Generate clinical insights
            insights = self._generate_insights(
                aggregated_findings,
                classification,
                pdf_content
            )
            
            # Calculate overall confidence
            overall_confidence = self._calculate_overall_confidence(successful_results)
            
            # Generate summary
            summary = self._generate_summary(
                classification,
                aggregated_findings,
                insights
            )
            
            # Generate recommendations
            recommendations = self._generate_recommendations(
                aggregated_findings,
                classification
            )
            
            # Compile final analysis
            analysis = {
                "document_type": classification["document_type"],
                "classification_confidence": classification["confidence"],
                "overall_confidence": overall_confidence,
                "summary": summary,
                "aggregated_findings": aggregated_findings,
                "clinical_insights": insights,
                "recommendations": recommendations,
                "models_used": [
                    {
                        "model": r["model_name"],
                        "domain": r["domain"],
                        "confidence": r.get("result", {}).get("confidence", 0.0)
                    }
                    for r in successful_results
                ],
                "quality_metrics": {
                    "models_executed": len(successful_results),
                    "models_failed": len(specialized_results) - len(successful_results),
                    "overall_confidence": overall_confidence
                },
                "metadata": {
                    "synthesis_timestamp": datetime.utcnow().isoformat(),
                    "page_count": pdf_content.get("page_count", 0),
                    "has_images": len(pdf_content.get("images", [])) > 0,
                    "has_tables": len(pdf_content.get("tables", [])) > 0
                }
            }
            
            logger.info("Synthesis completed successfully")
            
            return analysis
            
        except Exception as e:
            logger.error(f"Synthesis failed: {str(e)}")
            return self._generate_fallback_analysis(classification, pdf_content)
    
    def _aggregate_by_domain(
        self,
        results: List[Dict[str, Any]]
    ) -> Dict[str, Any]:
        """Aggregate results by medical domain"""
        aggregated = {}
        
        for result in results:
            domain = result.get("domain", "general")
            
            if domain not in aggregated:
                aggregated[domain] = {
                    "models": [],
                    "findings": [],
                    "confidence_scores": []
                }
            
            aggregated[domain]["models"].append(result["model_name"])
            
            # Extract findings from result
            result_data = result.get("result", {})
            
            if "findings" in result_data:
                aggregated[domain]["findings"].append(result_data["findings"])
            
            if "key_findings" in result_data:
                aggregated[domain]["findings"].extend(result_data["key_findings"])
            
            if "analysis" in result_data:
                aggregated[domain]["findings"].append(result_data["analysis"])
            
            confidence = result_data.get("confidence", 0.0)
            aggregated[domain]["confidence_scores"].append(confidence)
        
        # Calculate average confidence per domain
        for domain in aggregated:
            scores = aggregated[domain]["confidence_scores"]
            aggregated[domain]["average_confidence"] = sum(scores) / len(scores) if scores else 0.0
        
        return aggregated
    
    def _generate_insights(
        self,
        aggregated_findings: Dict[str, Any],
        classification: Dict[str, Any],
        pdf_content: Dict[str, Any]
    ) -> List[Dict[str, str]]:
        """Generate clinical insights from aggregated findings"""
        insights = []
        
        # Document structure insight
        page_count = pdf_content.get("page_count", 0)
        if page_count > 0:
            insights.append({
                "category": "Document Structure",
                "insight": f"Document contains {page_count} pages with {'comprehensive' if page_count > 5 else 'standard'} documentation",
                "importance": "medium"
            })
        
        # Classification insight
        doc_type = classification["document_type"]
        confidence = classification["confidence"]
        insights.append({
            "category": "Document Classification",
            "insight": f"Document identified as {doc_type.replace('_', ' ').title()} with {confidence*100:.0f}% confidence",
            "importance": "high"
        })
        
        # Domain-specific insights
        for domain, data in aggregated_findings.items():
            avg_confidence = data.get("average_confidence", 0.0)
            model_count = len(data.get("models", []))
            
            insights.append({
                "category": domain.replace("_", " ").title(),
                "insight": f"Analysis completed by {model_count} specialized model(s) with {avg_confidence*100:.0f}% average confidence",
                "importance": "high" if avg_confidence > 0.8 else "medium"
            })
        
        # Data richness insight
        has_images = pdf_content.get("images", [])
        has_tables = pdf_content.get("tables", [])
        
        if has_images:
            insights.append({
                "category": "Multimodal Content",
                "insight": f"Document contains {len(has_images)} image(s) for enhanced analysis",
                "importance": "medium"
            })
        
        if has_tables:
            insights.append({
                "category": "Structured Data",
                "insight": f"Document contains {len(has_tables)} table(s) with structured information",
                "importance": "medium"
            })
        
        return insights
    
    def _calculate_overall_confidence(self, results: List[Dict[str, Any]]) -> float:
        """Calculate weighted overall confidence score"""
        if not results:
            return 0.0
        
        confidences = []
        weights = []
        
        for result in results:
            confidence = result.get("result", {}).get("confidence", 0.0)
            priority = result.get("priority", "secondary")
            
            # Weight by priority
            weight = 1.5 if priority == "primary" else 1.0
            
            confidences.append(confidence)
            weights.append(weight)
        
        # Weighted average
        weighted_sum = sum(c * w for c, w in zip(confidences, weights))
        total_weight = sum(weights)
        
        return weighted_sum / total_weight if total_weight > 0 else 0.0
    
    def _generate_summary(
        self,
        classification: Dict[str, Any],
        aggregated_findings: Dict[str, Any],
        insights: List[Dict[str, str]]
    ) -> str:
        """Generate executive summary of analysis"""
        doc_type = classification["document_type"].replace("_", " ").title()
        
        summary_parts = [
            f"Medical Document Analysis: {doc_type}",
            f"\nThis document has been processed through our comprehensive AI analysis pipeline using {len(aggregated_findings)} specialized medical AI domain(s).",
        ]
        
        # Add domain summaries
        for domain, data in aggregated_findings.items():
            domain_name = domain.replace("_", " ").title()
            model_count = len(data.get("models", []))
            avg_conf = data.get("average_confidence", 0.0)
            
            summary_parts.append(
                f"\n\n{domain_name}: Analyzed by {model_count} model(s) with {avg_conf*100:.0f}% confidence. "
                f"{'High confidence analysis completed.' if avg_conf > 0.8 else 'Analysis completed with moderate confidence.'}"
            )
        
        # Add insights summary
        high_importance = [i for i in insights if i.get("importance") == "high"]
        if high_importance:
            summary_parts.append(
                f"\n\nKey Findings: {len(high_importance)} high-priority insights identified for clinical review."
            )
        
        summary_parts.append(
            "\n\nThis analysis provides AI-assisted insights and should be reviewed by qualified healthcare professionals for clinical decision-making."
        )
        
        return "".join(summary_parts)
    
    def _generate_recommendations(
        self,
        aggregated_findings: Dict[str, Any],
        classification: Dict[str, Any]
    ) -> List[Dict[str, str]]:
        """Generate recommendations based on analysis"""
        recommendations = []
        
        # Classification-based recommendations
        doc_type = classification["document_type"]
        
        if doc_type == "radiology":
            recommendations.append({
                "category": "Clinical Review",
                "recommendation": "Radiologist review recommended for imaging findings confirmation",
                "priority": "high"
            })
        
        elif doc_type == "pathology":
            recommendations.append({
                "category": "Clinical Review",
                "recommendation": "Pathologist verification required for tissue analysis",
                "priority": "high"
            })
        
        elif doc_type == "laboratory":
            recommendations.append({
                "category": "Clinical Review",
                "recommendation": "Review laboratory values in context of patient history",
                "priority": "medium"
            })
        
        elif doc_type == "cardiology":
            recommendations.append({
                "category": "Clinical Review",
                "recommendation": "Cardiologist review recommended for cardiac findings",
                "priority": "high"
            })
        
        # General recommendations
        recommendations.append({
            "category": "Data Quality",
            "recommendation": "All AI-generated insights should be validated by qualified healthcare professionals",
            "priority": "high"
        })
        
        recommendations.append({
            "category": "Documentation",
            "recommendation": "Maintain this analysis report with patient medical records",
            "priority": "medium"
        })
        
        # Confidence-based recommendations
        low_confidence_domains = [
            domain for domain, data in aggregated_findings.items()
            if data.get("average_confidence", 0.0) < 0.7
        ]
        
        if low_confidence_domains:
            recommendations.append({
                "category": "Analysis Quality",
                "recommendation": f"Lower confidence detected in {', '.join(low_confidence_domains)}. Consider manual review.",
                "priority": "medium"
            })
        
        return recommendations
    
    def _generate_fallback_analysis(
        self,
        classification: Dict[str, Any],
        pdf_content: Dict[str, Any]
    ) -> Dict[str, Any]:
        """Generate fallback analysis when no models succeeded"""
        return {
            "document_type": classification["document_type"],
            "classification_confidence": classification["confidence"],
            "overall_confidence": 0.0,
            "summary": "Analysis could not be completed. Document was classified but specialized model processing failed.",
            "aggregated_findings": {},
            "clinical_insights": [],
            "recommendations": [{
                "category": "Manual Review",
                "recommendation": "Manual review required - automated analysis unavailable",
                "priority": "high"
            }],
            "models_used": [],
            "quality_metrics": {
                "models_executed": 0,
                "models_failed": 0,
                "overall_confidence": 0.0
            },
            "metadata": {
                "synthesis_timestamp": datetime.utcnow().isoformat(),
                "page_count": pdf_content.get("page_count", 0),
                "fallback": True
            }
        }
    
    def _early_fusion(self, results: List[Dict]) -> Dict:
        """Early fusion strategy - combine features before analysis"""
        pass
    
    def _late_fusion(self, results: List[Dict]) -> Dict:
        """Late fusion strategy - combine predictions after analysis"""
        pass
    
    def _weighted_fusion(self, results: List[Dict]) -> Dict:
        """Weighted fusion strategy - weight by model confidence"""
        pass