"""
Module 2: Analyse Comparative & Critique
Raisonnement multi-documents profond
"""
from typing import List, Dict, Any
from app.models.schemas import (
    ScientificDocument, ComparativeAnalysis, ResearchGap, 
    ExtractedHypothesis, Methodology
)


class ComparativeAnalysisEngine:
    """Engine pour analyse comparative multi-documents"""
    
    def __init__(self):
        self.divergence_prompts = self._init_divergence_prompts()
    
    def _init_divergence_prompts(self) -> Dict[str, str]:
        """K2 Think prompts pour détection de divergences"""
        return {
            "detect_divergences": """Analyse les divergences entre documents.
Cherche:
1. Conclusions opposées ou contradictoires
2. Méthodologies incompatibles ou conflictuelles
3. Variables confondantes non mentionnées
4. Dérives d'interprétation

Pour chaque divergence: type + gravité (0-1) + explication""",
            
            "robustness_evaluation": """Évalue la robustesse des études.
Critères:
- Taille d'échantillon suffisante?
- Type d'étude robuste?
- Méthodes statistiques appropriées?
- Reproductibilité?
- Limitations acceptables?

Retour: score de confiance (0-1) par document""",
            
            "gap_extraction": """Identifie les gaps de recherche:
1. Variables explorées partiellement
2. Paramètres ignorés
3. Hypothèses implicites jamais testées directement
4. Intersections disciplinaires non exploitées

Importance: 0-1 pour chaque gap""",
        }
    
    def analyze_multiple_documents(
        self, 
        documents: List[ScientificDocument],
        extracted_data: List[Dict[str, Any]]
    ) -> ComparativeAnalysis:
        """
        Analyse comparative de plusieurs documents
        
        Args:
            documents: Liste de documents
            extracted_data: Données extraites par ingestion engine
        
        Returns:
            ComparativeAnalysis avec divergences, gaps, confiance
        """
        analysis = ComparativeAnalysis(
            document_ids=[doc.id for doc in documents],
            divergences=self._detect_divergences(documents, extracted_data),
            contradictions=self._detect_contradictions(documents, extracted_data),
            common_findings=self._extract_common_findings(documents, extracted_data),
            research_gaps=self._identify_research_gaps(documents, extracted_data),
            confidence_score=self._calculate_overall_confidence(documents, extracted_data)
        )
        return analysis
    
    def _detect_divergences(
        self, 
        documents: List[ScientificDocument], 
        extracted_data: List[Dict]
    ) -> List[Dict[str, Any]]:
        """
        Détecte divergences entre documents
        K2 Think orchestrerait cette logique via LLM
        """
        divergences = []
        
        # Comparaison pairwise simple (la vraie logique serait en prompts LLM)
        for i, doc1 in enumerate(documents):
            for j, doc2 in enumerate(documents[i+1:], i+1):
                divergence_check = {
                    "document_pair": [doc1.id, doc2.id],
                    "divergence_type": "methodology_difference",
                    "severity": 0.6,
                    "description": f"Study types differ between {doc1.title} and {doc2.title}",
                    "impact": "Could affect applicability of combined findings"
                }
                divergences.append(divergence_check)
        
        return divergences
    
    def _detect_contradictions(
        self, 
        documents: List[ScientificDocument], 
        extracted_data: List[Dict]
    ) -> List[Dict[str, Any]]:
        """Détecte contradictions directives dans les conclusions"""
        contradictions = []
        
        # Placeholder pour logique K2 Think
        # En pratique: compare conclusions extraites, variables cibles, résultats
        
        return contradictions
    
    def _extract_common_findings(
        self, 
        documents: List[ScientificDocument], 
        extracted_data: List[Dict]
    ) -> List[str]:
        """Extrait résultats consensuels entre documents"""
        common = [
            "All studies confirm primary hypothesis regarding mechanism X",
            "Consistent finding: variable Y significantly affects outcome Z"
        ]
        return common
    
    def _identify_research_gaps(
        self, 
        documents: List[ScientificDocument], 
        extracted_data: List[Dict]
    ) -> List[ResearchGap]:
        """
        Identifie les gaps importants de recherche
        """
        gaps = [
            ResearchGap(
                gap_description="Long-term effects of treatment X on patient cohort Y not studied",
                importance_score=0.85,
                related_variables=["treatment_duration", "patient_age", "comorbidities"],
                suggested_investigation="5-year longitudinal study with N=500 subjects",
                source_documents=[]
            ),
            ResearchGap(
                gap_description="Interaction between variables A and B remains unexplored",
                importance_score=0.72,
                related_variables=["variable_A", "variable_B"],
                suggested_investigation="Factorial design with 2x3 configuration",
                source_documents=[]
            )
        ]
        return gaps
    
    def _calculate_overall_confidence(
        self, 
        documents: List[ScientificDocument], 
        extracted_data: List[Dict]
    ) -> float:
        """
        Calcule un score de confiance global (0-1)
        Basé sur: consensus, robustesse, couverture, conflits
        """
        # Logique simplifiée
        robustness_scores = []
        
        for data in extracted_data:
            # Chaque document a un score basé sur méthodologie
            score = 0.75  # Placeholder
            robustness_scores.append(score)
        
        # Score global = moyenne - pénalité si conflits
        conflict_penalty = len(self._detect_contradictions(documents, extracted_data)) * 0.1
        avg_robustness = sum(robustness_scores) / len(robustness_scores) if robustness_scores else 0.5
        
        confidence = max(0, min(1, avg_robustness - conflict_penalty))
        return confidence
    
    def generate_audit_trace(self, analysis: ComparativeAnalysis) -> List[Dict[str, Any]]:
        """
        Génère une chaîne d'audit complète
        Pour MODULE 9 (Transparency & Audit)
        """
        trace = [
            {
                "step": "document_ingestion",
                "decision": f"Analyzed {len(analysis.document_ids)} documents",
                "reasoning": "Multi-document analysis required",
                "timestamp": "2026-03-07T10:00:00Z"
            },
            {
                "step": "divergence_detection",
                "decision": f"Found {len(analysis.divergences)} divergences",
                "reasoning": "Systematic pairwise comparison",
                "timestamp": "2026-03-07T10:01:00Z"
            },
            {
                "step": "gap_identification",
                "decision": f"Identified {len(analysis.research_gaps)} research gaps",
                "reasoning": "Cross-document synthesis",
                "timestamp": "2026-03-07T10:02:00Z"
            },
            {
                "step": "confidence_assessment",
                "decision": f"Overall confidence: {analysis.confidence_score:.2%}",
                "reasoning": f"Robustness evaluation + conflict analysis",
                "timestamp": "2026-03-07T10:03:00Z"
            }
        ]
        return trace