"""admin/routers/analytics.py — Analytics and reporting routes.

Routes:
  GET /{slug}/analytics              — Daily session counts
  GET /{slug}/analytics/funnel       — Conversion funnel
  GET /{slug}/analytics/intents      — Intent label distribution
  GET /{slug}/analytics/unanswered   — Phase 10A: Unanswered/boundary questions
  GET /{slug}/analytics/books        — Phase 10B: Per-book engagement breakdown
  GET /{slug}/analytics/heatmap      — Phase 10C: Hourly × weekday activity heatmap
  GET /{slug}/analytics/visitors     — Unique visitor counts (new vs returning)
  GET /{slug}/analytics/geo          — Country and city distribution
  GET /{slug}/analytics/devices      — Device, browser, OS breakdown
  GET /{slug}/analytics/sessions/stats — Avg turns, avg rating, session stats
"""

from fastapi import APIRouter, Depends, Query
from sqlalchemy.ext.asyncio import AsyncSession

from app.dependencies import get_db, get_current_author_scoped
from app.services.admin_analytics_service import AdminAnalyticsService

router = APIRouter()


@router.get("/{author_slug}/analytics")
async def get_analytics(
    author_slug: str,
    days: int = Query(30, ge=1, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return daily session counts for dashboard charts."""
    return await AdminAnalyticsService(db).daily_sessions(current_user.id, days)


@router.get("/{author_slug}/analytics/funnel")
async def get_conversion_funnel(
    author_slug: str,
    days: int = Query(30, ge=1, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return conversion funnel data (sessions → chat → book → link → click)."""
    return await AdminAnalyticsService(db).conversion_funnel(current_user.id, days)


@router.get("/{author_slug}/analytics/intents")
async def get_intent_distribution(
    author_slug: str,
    days: int = Query(30, ge=1, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return distribution of detected intent labels."""
    return await AdminAnalyticsService(db).intent_distribution(current_user.id, days)


@router.get("/{author_slug}/analytics/unanswered")
async def get_unanswered_questions(
    author_slug: str,
    days: int = Query(30, ge=1, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return sessions where boundary/fallback was triggered."""
    return await AdminAnalyticsService(db).unanswered_questions(current_user.id, days)


@router.get("/{author_slug}/analytics/books")
async def get_book_analytics(
    author_slug: str,
    days: int = Query(30, ge=1, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return per-book engagement breakdown."""
    return await AdminAnalyticsService(db).book_engagement(current_user.id, days)


@router.get("/{author_slug}/analytics/heatmap")
async def get_activity_heatmap(
    author_slug: str,
    days: int = Query(90, ge=7, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return hourly × weekday activity heatmap."""
    return await AdminAnalyticsService(db).activity_heatmap(current_user.id, days)


@router.get("/{author_slug}/analytics/visitors")
async def get_visitor_stats(
    author_slug: str,
    days: int = Query(30, ge=1, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return unique visitor counts with new vs returning breakdown."""
    return await AdminAnalyticsService(db).visitor_stats(current_user.id, days)


@router.get("/{author_slug}/analytics/geo")
async def get_geo_breakdown(
    author_slug: str,
    days: int = Query(30, ge=1, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return geographic distribution of visitors."""
    return await AdminAnalyticsService(db).geo_breakdown(current_user.id, days)


@router.get("/{author_slug}/analytics/devices")
async def get_device_breakdown(
    author_slug: str,
    days: int = Query(30, ge=1, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return device, browser, and OS distribution of visitors."""
    return await AdminAnalyticsService(db).device_breakdown(current_user.id, days)


@router.get("/{author_slug}/analytics/sessions/stats")
async def get_session_stats(
    author_slug: str,
    days: int = Query(30, ge=1, le=365),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return session-level aggregate statistics."""
    return await AdminAnalyticsService(db).session_stats(current_user.id, days)