# ============================================================
#  routers/historique.py — Snapshots journaliers (TABLE_FINAL)
# ============================================================

from datetime import date
from typing import Optional

from fastapi import APIRouter, Depends, Query

from auth import get_current_user
from config import get_cursor
from helpers import get_table_name, rows_to_list

router = APIRouter(dependencies=[Depends(get_current_user)], tags=["Historique"])


@router.get("")
def get_historique(
    id_monito  : Optional[int]  = Query(None),
    date_debut : Optional[date] = Query(None, description="YYYY-MM-DD"),
    date_fin   : Optional[date] = Query(None, description="YYYY-MM-DD"),
    service    : Optional[str]  = Query(None),
):
    """Snapshots journaliers (TABLE_FINAL)."""
    query  = (
        "SELECT id_monito, nom_monito, nb_erreurs, service, categorie, bdd_source, "
        "CONVERT(NVARCHAR, date_sauvegarde, 23) AS date_sauvegarde "
        "FROM TABLE_FINAL WHERE 1=1"
    )
    params = []

    if id_monito:
        query += " AND id_monito = ?"
        params.append(id_monito)
    if date_debut:
        query += " AND date_sauvegarde >= ?"
        params.append(str(date_debut))
    if date_fin:
        query += " AND date_sauvegarde <= ?"
        params.append(str(date_fin))
    if service:
        query += " AND service = ?"
        params.append(service)

    query += " ORDER BY date_sauvegarde ASC, id_monito ASC"

    with get_cursor() as cursor:
        cursor.execute(query, *params)
        return rows_to_list(cursor, cursor.fetchall())


@router.get("/comparaison")
def get_comparaison(
    date_debut : Optional[date] = Query(None),
    date_fin   : Optional[date] = Query(None),
):
    """
    Déprécié — utiliser GET /evolution/par-monitoring à la place.
    Conservé pour compatibilité ascendante.
    """
    query  = (
        "SELECT CONVERT(NVARCHAR, date_sauvegarde, 23) AS date, "
        "id_monito, nom_monito, nb_erreurs, service "
        "FROM TABLE_FINAL WHERE 1=1"
    )
    params = []

    if date_debut:
        query += " AND date_sauvegarde >= ?"
        params.append(str(date_debut))
    if date_fin:
        query += " AND date_sauvegarde <= ?"
        params.append(str(date_fin))

    query += " ORDER BY date_sauvegarde ASC, id_monito ASC"

    with get_cursor() as cursor:
        cursor.execute(query, *params)
        return rows_to_list(cursor, cursor.fetchall())


@router.get("/{id_monito}/evolution")
def get_evolution(
    id_monito  : int,
    date_debut : Optional[date] = Query(None),
    date_fin   : Optional[date] = Query(None),
):
    """Évolution d'un monitoring — format optimisé Recharts."""
    get_table_name(id_monito)  # valide l'existence du monitoring

    query  = (
        "SELECT CONVERT(NVARCHAR, date_sauvegarde, 23) AS date, nb_erreurs "
        "FROM TABLE_FINAL WHERE id_monito = ?"
    )
    params = [id_monito]

    if date_debut:
        query += " AND date_sauvegarde >= ?"
        params.append(str(date_debut))
    if date_fin:
        query += " AND date_sauvegarde <= ?"
        params.append(str(date_fin))

    query += " ORDER BY date_sauvegarde ASC"

    with get_cursor() as cursor:
        cursor.execute(query, *params)
        data = [{"date": r[0], "nb_erreurs": r[1]} for r in cursor.fetchall()]

    return {"id_monito": id_monito, "points": len(data), "evolution": data}