"""
Circumference Tracking Endpoints for Mitai Jinkendo

Handles body circumference measurements (8 measurement points).
"""
import uuid
import logging
from typing import Optional

from fastapi import APIRouter, Header, Depends, HTTPException

from db import get_db, get_cursor, r2d
from auth import require_auth, check_feature_access, increment_feature_usage
from models import CircumferenceEntry
from routers.profiles import get_pid
from feature_logger import log_feature_usage

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


@router.get("")
def list_circs(limit: int=100, x_profile_id: Optional[str]=Header(default=None), session: dict=Depends(require_auth)):
    """Get circumference entries for current profile."""
    pid = get_pid(x_profile_id)
    with get_db() as conn:
        cur = get_cursor(conn)
        cur.execute(
            "SELECT * FROM circumference_log WHERE profile_id=%s ORDER BY date DESC LIMIT %s", (pid,limit))
        return [r2d(r) for r in cur.fetchall()]


@router.post("")
def upsert_circ(e: CircumferenceEntry, x_profile_id: Optional[str]=Header(default=None), session: dict=Depends(require_auth)):
    """Create or update circumference entry (upsert by date)."""
    pid = get_pid(x_profile_id)

    # Phase 4: Check feature access and ENFORCE
    access = check_feature_access(pid, 'circumference_entries')
    log_feature_usage(pid, 'circumference_entries', access, 'create')

    if not access['allowed']:
        logger.warning(
            f"[FEATURE-LIMIT] User {pid} blocked: "
            f"circumference_entries {access['reason']} (used: {access['used']}, limit: {access['limit']})"
        )
        raise HTTPException(
            status_code=403,
            detail=f"Limit erreicht: Du hast das Kontingent für Umfangs-Einträge überschritten ({access['used']}/{access['limit']}). "
                   f"Bitte kontaktiere den Admin oder warte bis zum nächsten Reset."
        )

    with get_db() as conn:
        cur = get_cursor(conn)
        cur.execute("SELECT id FROM circumference_log WHERE profile_id=%s AND date=%s", (pid,e.date))
        ex = cur.fetchone()
        d = e.model_dump()
        is_new_entry = not ex

        if ex:
            # UPDATE existing entry
            eid = ex['id']
            sets = ', '.join(f"{k}=%s" for k in d if k!='date')
            cur.execute(f"UPDATE circumference_log SET {sets} WHERE id=%s",
                         [v for k,v in d.items() if k!='date']+[eid])
        else:
            # INSERT new entry
            eid = str(uuid.uuid4())
            cur.execute("""INSERT INTO circumference_log
                (id,profile_id,date,c_neck,c_chest,c_waist,c_belly,c_hip,c_thigh,c_calf,c_arm,notes,photo_id,created)
                VALUES (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,CURRENT_TIMESTAMP)""",
                (eid,pid,d['date'],d['c_neck'],d['c_chest'],d['c_waist'],d['c_belly'],
                 d['c_hip'],d['c_thigh'],d['c_calf'],d['c_arm'],d['notes'],d['photo_id']))

            # Phase 2: Increment usage counter (only for new entries)
            increment_feature_usage(pid, 'circumference_entries')

    return {"id":eid,"date":e.date}


@router.put("/{eid}")
def update_circ(eid: str, e: CircumferenceEntry, x_profile_id: Optional[str]=Header(default=None), session: dict=Depends(require_auth)):
    """Update existing circumference entry."""
    pid = get_pid(x_profile_id)
    with get_db() as conn:
        d = e.model_dump()
        cur = get_cursor(conn)
        cur.execute(f"UPDATE circumference_log SET {', '.join(f'{k}=%s' for k in d)} WHERE id=%s AND profile_id=%s",
                     list(d.values())+[eid,pid])
    return {"id":eid}


@router.delete("/{eid}")
def delete_circ(eid: str, x_profile_id: Optional[str]=Header(default=None), session: dict=Depends(require_auth)):
    """Delete circumference entry."""
    pid = get_pid(x_profile_id)
    with get_db() as conn:
        cur = get_cursor(conn)
        cur.execute("DELETE FROM circumference_log WHERE id=%s AND profile_id=%s", (eid,pid))
    return {"ok":True}
