from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, desc
from pydantic import BaseModel
from typing import Optional, List
from datetime import datetime

from app.core.database import get_db
from app.core.security import get_current_user
from app.models.user import User, PersonalRecord, NamedRoute, RouteSegment, HealthMetric, Activity

router = APIRouter()


# ─── Personal Records ────────────────────────────────────────────────────────

class PROut(BaseModel):
    id: int
    sport_type: str
    distance_m: float
    distance_label: str
    duration_s: float
    achieved_at: datetime
    activity_id: int

    class Config:
        from_attributes = True


@router.get("/", response_model=List[PROut])
async def list_records(
    sport_type: Optional[str] = None,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    q = select(PersonalRecord).where(
        PersonalRecord.user_id == current_user.id,
        PersonalRecord.is_current_record == True,
    )
    if sport_type:
        q = q.where(PersonalRecord.sport_type == sport_type)
    q = q.order_by(PersonalRecord.distance_m)
    result = await db.execute(q)
    return result.scalars().all()


@router.get("/history/{distance_label}")
async def record_history(
    distance_label: str,
    sport_type: str = "running",
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    """Show progression of a PR over time."""
    result = await db.execute(
        select(PersonalRecord).where(
            PersonalRecord.user_id == current_user.id,
            PersonalRecord.sport_type == sport_type,
            PersonalRecord.distance_label == distance_label,
        ).order_by(PersonalRecord.achieved_at)
    )
    return result.scalars().all()