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from pydantic import BaseModel
from typing import Optional, List
from enum import Enum

class UserIntent(str, Enum):
    QUESTION = "question"
    EMOTIONAL_SUPPORT = "emotional_support"
    PRAYER_REQUEST = "prayer_request"
    BIBLE_STUDY = "bible_study"
    LIFE_DECISION = "life_decision"
    CONFESSION = "confession"
    UNKNOWN = "unknown"

class IntentAnalysis(BaseModel):
    intent: UserIntent
    urgency: str = "low" # low, medium, high
    requires_scripture: bool
    emotional_tone: Optional[str] = None
    confidence: float = 1.0

class IntentService:
    def __init__(self):
        # Keywords for deterministic matching
        self.intent_keywords = {
            UserIntent.PRAYER_REQUEST: ["pray", "prayer", "intercede", "god help", "need god"],
            UserIntent.EMOTIONAL_SUPPORT: ["sad", "depressed", "anxious", "lonely", "hurt", "grief", "pain", "crying", "broken", "suffering"],
            UserIntent.BIBLE_STUDY: ["verse", "scripture", "passage", "chapter", "bible", "read", "psalm", "gospel", "book of"],
            UserIntent.LIFE_DECISION: ["decide", "choice", "what should i do", "guidance", "direction", "path", "will for me"],
            UserIntent.CONFESSION: ["sin", "forgive", "confess", "guilt", "mistake", "wrong", "sorry", "repent"],
            UserIntent.QUESTION: ["who", "what", "where", "when", "why", "how", "?"],
        }

    async def analyze(self, message: str) -> IntentAnalysis:
        msg_lower = message.lower()
        
        # Priority 1: High urgency / Specific needs
        if any(kw in msg_lower for kw in self.intent_keywords[UserIntent.PRAYER_REQUEST]):
             return IntentAnalysis(intent=UserIntent.PRAYER_REQUEST, requires_scripture=True, urgency="medium")
             
        if any(kw in msg_lower for kw in self.intent_keywords[UserIntent.CONFESSION]):
            return IntentAnalysis(intent=UserIntent.CONFESSION, requires_scripture=True, urgency="medium")

        if any(kw in msg_lower for kw in self.intent_keywords[UserIntent.EMOTIONAL_SUPPORT]):
            return IntentAnalysis(intent=UserIntent.EMOTIONAL_SUPPORT, requires_scripture=True, urgency="medium")

        # Priority 2: Study and Guidance
        if any(kw in msg_lower for kw in self.intent_keywords[UserIntent.BIBLE_STUDY]):
             return IntentAnalysis(intent=UserIntent.BIBLE_STUDY, requires_scripture=True)

        if any(kw in msg_lower for kw in self.intent_keywords[UserIntent.LIFE_DECISION]):
             return IntentAnalysis(intent=UserIntent.LIFE_DECISION, requires_scripture=True, urgency="medium")

        # Priority 3: General Questions
        if any(kw in msg_lower for kw in self.intent_keywords[UserIntent.QUESTION]):
             return IntentAnalysis(intent=UserIntent.QUESTION, requires_scripture=False)
             
        # Fallback
        return IntentAnalysis(intent=UserIntent.UNKNOWN, requires_scripture=False)

intent_service = IntentService()