"""
Evaluation Endpoints - Training Type Profiles
Endpoints for activity evaluation and re-evaluation.

Issue: #15
Date: 2026-03-23
"""
import logging
from typing import Optional
from fastapi import APIRouter, HTTPException, Depends

from db import get_db, get_cursor, r2d
from auth import require_auth, require_admin
from evaluation_helper import (
    evaluate_and_save_activity,
    batch_evaluate_activities,
    load_parameters_registry
)

router = APIRouter(prefix="/api/evaluation", tags=["evaluation"])
logger = logging.getLogger(__name__)


@router.get("/parameters")
def list_parameters(session: dict = Depends(require_auth)):
    """
    List all available training parameters.
    """
    with get_db() as conn:
        cur = get_cursor(conn)
        parameters = load_parameters_registry(cur)

    return {
        "parameters": list(parameters.values()),
        "count": len(parameters)
    }


@router.post("/activity/{activity_id}")
def evaluate_activity(
    activity_id: str,
    session: dict = Depends(require_auth)
):
    """
    Evaluates or re-evaluates a single activity.

    Returns the evaluation result.
    """
    profile_id = session['profile_id']

    with get_db() as conn:
        cur = get_cursor(conn)

        # Load activity
        cur.execute("""
            SELECT id, profile_id, date, training_type_id, duration_min,
                   hr_avg, hr_max, distance_km, kcal_active, kcal_resting,
                   rpe, pace_min_per_km, cadence, elevation_gain
            FROM activity_log
            WHERE id = %s AND profile_id = %s
        """, (activity_id, profile_id))

        activity = cur.fetchone()
        if not activity:
            raise HTTPException(404, "Activity not found")

        activity_dict = dict(activity)

        # Evaluate
        result = evaluate_and_save_activity(
            cur,
            activity_dict["id"],
            activity_dict,
            activity_dict["training_type_id"],
            profile_id
        )

        if not result:
            return {
                "message": "No profile configured for this training type",
                "evaluation": None
            }

    return {
        "message": "Activity evaluated",
        "evaluation": result
    }


@router.post("/batch")
def batch_evaluate(
    limit: Optional[int] = None,
    session: dict = Depends(require_auth)
):
    """
    Re-evaluates all activities for the current user.

    Optional limit parameter for testing.
    """
    profile_id = session['profile_id']

    with get_db() as conn:
        cur = get_cursor(conn)
        stats = batch_evaluate_activities(cur, profile_id, limit)

    return {
        "message": "Batch evaluation completed",
        "stats": stats
    }


@router.post("/batch/all")
def batch_evaluate_all(session: dict = Depends(require_admin)):
    """
    Admin-only: Re-evaluates all activities for all users.

    Use with caution on large databases!
    """
    with get_db() as conn:
        cur = get_cursor(conn)

        # Get all profiles
        cur.execute("SELECT id FROM profiles")
        profiles = cur.fetchall()

        total_stats = {
            "profiles": len(profiles),
            "total": 0,
            "evaluated": 0,
            "skipped": 0,
            "errors": 0
        }

        for profile in profiles:
            profile_id = profile['id']
            stats = batch_evaluate_activities(cur, profile_id)

            total_stats["total"] += stats["total"]
            total_stats["evaluated"] += stats["evaluated"]
            total_stats["skipped"] += stats["skipped"]
            total_stats["errors"] += stats["errors"]

    return {
        "message": "Batch evaluation for all users completed",
        "stats": total_stats
    }