"""admin/routers/dashboard.py — Sessions, transcripts, and message moderation.

Routes:
  GET    /{slug}/dashboard
  GET    /{slug}/sessions
  GET    /{slug}/sessions/search
  POST   /{slug}/sessions/{id}/block
  POST   /{slug}/sessions/{id}/unblock
  GET    /{slug}/sessions/{id}/transcript
  POST   /{slug}/sessions/{id}/messages/{mid}/annotate
  POST   /{slug}/sessions/{id}/messages/{mid}/flag
"""

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

from app.dependencies import get_db, get_current_author_scoped
from app.schemas.admin import AnnotateRequest, FlagRequest
from app.services.dashboard_service import DashboardService

router = APIRouter()


@router.get("/{author_slug}/dashboard")
async def dashboard(
    author_slug: str,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return high-level dashboard stats for the author."""
    return await DashboardService(db).get_dashboard_stats(current_user.id)


@router.get("/{author_slug}/sessions")
async def list_sessions(
    author_slug: str,
    limit: int = Query(50, ge=1, le=200),
    offset: int = 0,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """List reader sessions with pagination."""
    return await DashboardService(db).list_sessions(current_user.id, limit, offset)


@router.get("/{author_slug}/sessions/search")
async def search_sessions(
    author_slug: str,
    q: str = Query("", min_length=0, max_length=200),
    page: int = Query(1, ge=1),
    per_page: int = Query(20, ge=1, le=100),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Full-text search across chat messages for the author."""
    return await DashboardService(db).search_sessions(current_user.id, q, page, per_page)


@router.post("/{author_slug}/sessions/{session_id}/block")
async def block_session(
    author_slug: str,
    session_id: str,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Block a visitor session."""
    if not await DashboardService(db).block_session(current_user.id, session_id):
        raise HTTPException(404, "Session not found")
    return {"message": "Session blocked"}


@router.post("/{author_slug}/sessions/{session_id}/unblock")
async def unblock_session(
    author_slug: str,
    session_id: str,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Unblock a visitor session."""
    if not await DashboardService(db).unblock_session(current_user.id, session_id):
        raise HTTPException(404, "Session not found")
    return {"message": "Session unblocked"}


@router.get("/{author_slug}/sessions/{session_id}/transcript")
async def get_transcript(
    author_slug: str,
    session_id: str,
    page: int = Query(1, ge=1),
    per_page: int = Query(50, ge=1, le=200),
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Return paginated message transcript for a session."""
    result = await DashboardService(db).get_transcript(
        current_user.id, session_id, page, per_page,
    )
    if result is None:
        raise HTTPException(404, "Session not found")
    return result


@router.post("/{author_slug}/sessions/{session_id}/messages/{message_id}/annotate")
async def annotate_message(
    author_slug: str,
    session_id: str,
    message_id: str,
    body: AnnotateRequest,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Add admin annotation to a chat message (append-only). R-029: Schema validated."""
    result = await DashboardService(db).annotate_message(
        current_user.id, session_id, message_id, body.annotation,
    )
    if result is None:
        raise HTTPException(404, "Message not found")
    return result


@router.post("/{author_slug}/sessions/{session_id}/messages/{message_id}/flag")
async def flag_message(
    author_slug: str,
    session_id: str,
    message_id: str,
    body: FlagRequest,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Flag a message as spam, quality issue, or escalation. R-029: Schema validated."""
    result = await DashboardService(db).flag_message(
        current_user.id, session_id, message_id, body.flag_type,
    )
    if result is None:
        raise HTTPException(404, "Message not found")
    return result