"""
Métriques Prometheus custom pour le hub d'images.

Exposed via /metrics par prometheus-fastapi-instrumentator.
"""
from prometheus_client import Counter, Histogram, Gauge

# ── Images ────────────────────────────────────────────────────
hub_images_uploaded = Counter(
    "hub_images_uploaded_total",
    "Nombre total d'images uploadées",
    ["client_plan"],
)

hub_images_deleted = Counter(
    "hub_images_deleted_total",
    "Nombre total d'images supprimées",
)

# ── Pipeline ──────────────────────────────────────────────────
hub_pipeline_duration = Histogram(
    "hub_pipeline_duration_seconds",
    "Durée du pipeline de traitement complet",
    buckets=[1, 5, 10, 30, 60, 120, 300],
)

hub_pipeline_step_duration = Histogram(
    "hub_pipeline_step_duration_seconds",
    "Durée de chaque étape du pipeline",
    ["step"],
    buckets=[0.1, 0.5, 1, 5, 10, 30, 60],
)

hub_pipeline_errors = Counter(
    "hub_pipeline_errors_total",
    "Nombre d'erreurs pipeline",
    ["step"],
)

# ── Storage ───────────────────────────────────────────────────
hub_storage_used_bytes = Gauge(
    "hub_storage_used_bytes",
    "Espace de stockage utilisé par client",
    ["client_id"],
)

# ── ARQ ───────────────────────────────────────────────────────
hub_arq_jobs_enqueued = Counter(
    "hub_arq_jobs_enqueued_total",
    "Nombre de jobs ARQ enfilés",
    ["queue"],
)

hub_arq_jobs_completed = Counter(
    "hub_arq_jobs_completed_total",
    "Nombre de jobs ARQ terminés",
)

hub_arq_jobs_failed = Counter(
    "hub_arq_jobs_failed_total",
    "Nombre de jobs ARQ échoués",
)