"""
Sensitive Topic Detector
Detects sensitive topics in queries and provides reframe guidance.

Uses trigger patterns from sensitive_topics.json to identify:
- Controversial claims
- Allegations
- Sensitive framings

Returns appropriate response strategies and suggested responses.
"""

from dataclasses import dataclass
from typing import List, Optional

from .knowledge_base import KnowledgeBase


@dataclass
class SensitiveMatch:
    """Result from sensitive topic detection"""
    entity_id: str
    entity_name: str
    topic_type: str
    severity: str  # "high", "medium", "low"
    matched_pattern: str
    problematic_framing: str
    suggested_response: str
    strategy: str  # "provide_context", "diplomatic", "decline"
    tone: str


class SensitiveTopicDetector:
    """
    Detects sensitive topics in queries using trigger patterns.
    
    This is a simple pattern-matching approach (not LLM-based) for
    fast detection. For more nuanced detection, use LLM verification.
    """
    
    def __init__(self, knowledge_base: KnowledgeBase = None, debug: bool = False):
        """
        Initialize detector.
        
        Args:
            knowledge_base: UAEKnowledgeBase instance (will load if not provided)
            debug: Enable debug output
        """
        self.debug = debug
        self.kb = knowledge_base or KnowledgeBase(debug=debug)
        
        # Build pattern index
        self._patterns: List[tuple] = []  # (pattern, topic_dict)
        self._build_pattern_index()
    
    def _build_pattern_index(self) -> None:
        """Build searchable pattern index"""
        for topic in self.kb._sensitive_topics_raw:
            for pattern in topic.get("trigger_patterns", []):
                self._patterns.append((pattern.lower(), topic))
        
        # Sort by pattern length (longer patterns first for more specific matches)
        self._patterns.sort(key=lambda x: len(x[0]), reverse=True)
        
        if self.debug:
            print(f"✅ SensitiveTopicDetector: {len(self._patterns)} patterns indexed")
    
    def detect(self, query: str) -> List[SensitiveMatch]:
        """
        Detect sensitive topics in a query.
        
        Args:
            query: User query text
            
        Returns:
            List of SensitiveMatch objects for each triggered pattern
        """
        query_lower = query.lower()
        matches = []
        seen_topics = set()  # Avoid duplicates
        
        for pattern, topic in self._patterns:
            if pattern in query_lower:
                topic_id = topic.get("id", "")
                
                # Skip if already matched this topic
                if topic_id in seen_topics:
                    continue
                seen_topics.add(topic_id)
                
                response = topic.get("appropriate_response", {})
                
                match = SensitiveMatch(
                    entity_id=topic.get("source_entity_id", ""),
                    entity_name=topic.get("source_entity_name", ""),
                    topic_type=topic.get("topic_type", ""),
                    severity=topic.get("severity", "medium"),
                    matched_pattern=pattern,
                    problematic_framing=topic.get("problematic_framing", ""),
                    suggested_response=response.get("suggested_response", ""),
                    strategy=response.get("strategy", "provide_context"),
                    tone=response.get("tone", "factual_neutral"),
                )
                matches.append(match)
        
        if self.debug and matches:
            print(f"🚨 Sensitive topics detected: {len(matches)}")
            for m in matches:
                print(f"   - {m.matched_pattern} ({m.severity})")
        
        return matches
    
    def is_sensitive(self, query: str) -> bool:
        """Quick check if query contains any sensitive patterns"""
        query_lower = query.lower()
        for pattern, _ in self._patterns:
            if pattern in query_lower:
                return True
        return False
    
    def get_reframe_guidance(self, query: str) -> Optional[dict]:
        """
        Get reframe guidance for a sensitive query.
        
        Returns None if query is not sensitive.
        Returns dict with guidance if sensitive.
        """
        matches = self.detect(query)
        
        if not matches:
            return None
        
        # Get the highest severity match
        severity_order = {"high": 3, "medium": 2, "low": 1}
        matches.sort(key=lambda m: severity_order.get(m.severity, 0), reverse=True)
        
        primary = matches[0]
        
        return {
            "is_sensitive": True,
            "severity": primary.severity,
            "entity_name": primary.entity_name,
            "strategy": primary.strategy,
            "suggested_response": primary.suggested_response,
            "tone": primary.tone,
            "all_matches": [
                {
                    "pattern": m.matched_pattern,
                    "entity": m.entity_name,
                    "severity": m.severity,
                }
                for m in matches
            ],
        }
    
    def get_statistics(self) -> dict:
        """Get detector statistics"""
        severity_counts = {"high": 0, "medium": 0, "low": 0}
        type_counts = {}
        
        for _, topic in self._patterns:
            sev = topic.get("severity", "medium")
            severity_counts[sev] = severity_counts.get(sev, 0) + 1
            
            ttype = topic.get("topic_type", "unknown")
            type_counts[ttype] = type_counts.get(ttype, 0) + 1
        
        return {
            "total_patterns": len(self._patterns),
            "by_severity": severity_counts,
            "by_type": type_counts,
        }