from dataclasses import dataclass, field
from datetime import datetime, timezone

from app.models import AnalyticsSummary, FeedbackRequest


@dataclass
class FeedbackEvent:
    message_id: str
    helped: bool
    query: str
    system: str | None
    confidence: float
    created_at: str


class AnalyticsStore:
    def __init__(self) -> None:
        self._events: list[FeedbackEvent] = []

    def record(self, request: FeedbackRequest) -> FeedbackEvent:
        event = FeedbackEvent(
            message_id=request.message_id,
            helped=request.helped,
            query=request.query,
            system=request.system,
            confidence=request.confidence,
            created_at=datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%S"),
        )
        self._events.append(event)
        return event

    def summary(self) -> AnalyticsSummary:
        total = len(self._events)
        helped = sum(1 for e in self._events if e.helped)
        not_helped = total - helped
        deflection = round((helped / total) * 100, 1) if total else 0.0
        return AnalyticsSummary(
            total_feedback=total,
            helped_count=helped,
            not_helped_count=not_helped,
            deflection_rate=deflection,
        )


analytics_store = AnalyticsStore()