"""Configurable environment variables for GPUStack."""

import os

# Database configuration
DB_ECHO = os.getenv("GPUSTACK_DB_ECHO", "false").lower() == "true"
DB_POOL_SIZE = int(os.getenv("GPUSTACK_DB_POOL_SIZE", 30))
DB_MAX_OVERFLOW = int(os.getenv("GPUSTACK_DB_MAX_OVERFLOW", 20))
DB_POOL_TIMEOUT = int(os.getenv("GPUSTACK_DB_POOL_TIMEOUT", 30))

# Proxy configuration
PROXY_TIMEOUT = int(os.getenv("GPUSTACK_PROXY_TIMEOUT_SECONDS", 1800))
PROXY_UPSTREAM_IDLE_TIMEOUT = int(
    os.getenv("GPUSTACK_PROXY_UPSTREAM_IDLE_TIMEOUT_SECONDS", 3)
)

# HTTP client TCP connector configuration
TCP_CONNECTOR_LIMIT = int(os.getenv("GPUSTACK_TCP_CONNECTOR_LIMIT", 1000))

# JWT Expiration
JWT_TOKEN_EXPIRE_MINUTES = int(os.getenv("GPUSTACK_JWT_TOKEN_EXPIRE_MINUTES", 120))

# Higress plugin configuration
HIGRESS_EXT_AUTH_TIMEOUT_MS = int(
    os.getenv("GPUSTACK_HIGRESS_EXT_AUTH_TIMEOUT_MS", 30000)
)

# Server Cache
SERVER_CACHE_TTL_SECONDS = int(os.getenv("GPUSTACK_SERVER_CACHE_TTL_SECONDS", 600))
SERVER_CACHE_LOCKS_MAX_SIZE = int(
    os.getenv("GPUSTACK_SERVER_CACHE_LOCKS_MAX_SIZE", 10000)
)

# Server event bus queue capacity. Configurable via env so large clusters can tune the buffer.
EVENT_BUS_SUBSCRIBER_QUEUE_SIZE = int(
    os.getenv("GPUSTACK_EVENT_BUS_SUBSCRIBER_QUEUE_SIZE", 1024)
)

# Worker configuration
WORKER_HEARTBEAT_INTERVAL = int(
    os.getenv("GPUSTACK_WORKER_HEARTBEAT_INTERVAL", 30)
)  # in seconds
WORKER_STATUS_SYNC_INTERVAL = int(
    os.getenv("GPUSTACK_WORKER_STATUS_SYNC_INTERVAL", 30)
)  # in seconds
WORKER_HEARTBEAT_GRACE_PERIOD = int(
    os.getenv("GPUSTACK_WORKER_HEARTBEAT_GRACE_PERIOD", 150)
)  # 2.5 minutes in seconds
WORKER_ORPHAN_WORKLOAD_CLEANUP_GRACE_PERIOD = int(
    os.getenv("GPUSTACK_WORKER_ORPHAN_WORKLOAD_CLEANUP_GRACE_PERIOD", 300)
)  # 5 minutes in seconds
WORKER_ORPHAN_BENCHMARK_WORKLOAD_CLEANUP_GRACE_PERIOD = int(
    os.getenv("GPUSTACK_WORKER_ORPHAN_BENCHMARK_WORKLOAD_CLEANUP_GRACE_PERIOD", 300)
)  # 5 minutes in seconds
# Worker unreachable check mode: auto, enabled, disabled
# - auto: automatically disable check when worker count > 50 (default)
# - enabled: always perform unreachable check
# - disabled: never perform unreachable check
WORKER_UNREACHABLE_CHECK_MODE = os.getenv(
    "GPUSTACK_WORKER_UNREACHABLE_CHECK_MODE", "auto"
).lower()

# Model instance configuration
MODEL_INSTANCE_RESCHEDULE_GRACE_PERIOD = int(
    os.getenv("GPUSTACK_MODEL_INSTANCE_RESCHEDULE_GRACE_PERIOD", 300)
)  # 5 minutes in seconds
MODEL_INSTANCE_HEALTH_CHECK_INTERVAL = int(
    os.getenv("GPUSTACK_MODEL_INSTANCE_HEALTH_CHECK_INTERVAL", 3)
)
DISABLE_OS_FILELOCK = os.getenv("GPUSTACK_DISABLE_OS_FILELOCK", "false").lower() in [
    "true",
    "1",
]

# Opt out of automatically writing gpustack's configured port ranges to
# /proc/sys/net/ipv4/ip_local_reserved_ports. Use when the environment already
# manages the reservation, or when the configured ranges would starve the
# ephemeral pool after reservation.
SKIP_RESERVE_EPHEMERAL_PORTS = os.getenv(
    "GPUSTACK_SKIP_RESERVE_EPHEMERAL_PORTS", "false"
).lower() in ["true", "1"]
# Add debug logs for slow worker status collection, default to 3 minutes
WORKER_STATUS_COLLECTION_LOG_SLOW_SECONDS = float(
    os.getenv("GPUSTACK_WORKER_STATUS_COLLECTION_LOG_SLOW_SECONDS", 180)
)

# Model evaluation cache configuration
MODEL_EVALUATION_CACHE_MAX_SIZE = int(
    os.getenv("GPUSTACK_MODEL_EVALUATION_CACHE_MAX_SIZE", 1000)
)
MODEL_EVALUATION_CACHE_TTL = int(os.getenv("GPUSTACK_MODEL_EVALUATION_CACHE_TTL", 3600))

# Scheduler configuration (server-side)
SCHEDULER_SCALE_UP_PLACEMENT_MAX_SCORE = float(
    os.getenv("GPUSTACK_SCHEDULER_SCALE_UP_PLACEMENT_MAX_SCORE", 100)
)
SCHEDULER_SCALE_UP_LOCALITY_MAX_SCORE = float(
    os.getenv("GPUSTACK_SCHEDULER_SCALE_UP_LOCALITY_MAX_SCORE", 5)
)
# Scale-down scoring weights (relative, normalized in score chain)
SCHEDULER_SCALE_DOWN_STATUS_MAX_SCORE = float(
    os.getenv("GPUSTACK_SCHEDULER_SCALE_DOWN_STATUS_MAX_SCORE", 100)
)
SCHEDULER_SCALE_DOWN_OFFLOAD_MAX_SCORE = float(
    os.getenv("GPUSTACK_SCHEDULER_SCALE_DOWN_OFFLOAD_MAX_SCORE", 10)
)
SCHEDULER_SCALE_DOWN_PLACEMENT_MAX_SCORE = float(
    os.getenv("GPUSTACK_SCHEDULER_SCALE_DOWN_PLACEMENT_MAX_SCORE", 1)
)

MIGRATION_DATA_DIR = os.getenv("GPUSTACK_MIGRATION_DATA_DIR", None)

DATA_MIGRATION = os.getenv("GPUSTACK_DATA_MIGRATION", "false").lower() == "true"

GATEWAY_PORT_CHECK_INTERVAL = int(
    os.getenv("GPUSTACK_GATEWAY_PORT_CHECK_INTERVAL", 2)
)  # in seconds

GATEWAY_PORT_CHECK_RETRY_COUNT = int(
    os.getenv("GPUSTACK_GATEWAY_PORT_CHECK_RETRY_COUNT", 300)
)  # number of retries

GATEWAY_MIRROR_INGRESS_NAME = os.getenv(
    "GPUSTACK_GATEWAY_MIRROR_INGRESS_NAME", "gpustack"
)

GATEWAY_AI_STATISTICS_PLUGIN_CONTENT_TYPES = [
    ct.strip()
    for ct in os.getenv(
        "GPUSTACK_GATEWAY_AI_STATISTICS_PLUGIN_CONTENT_TYPES",
        "application/json,text/event-stream",
    ).split(",")
    if ct.strip()
]

# Heuristics for partial-stream usage estimation.
# Used by metrics_collector when a gateway report arrives with completed=false
# (client disconnect, upstream cancel) and token fields are blank or partial.
# Defaults target English-leaning GPT-style tokenizers; tune for CJK or other
# tokenizer families as needed.
# Clamped to >= 1 so an operator typo (e.g. ``=0``) can't make
# ``_estimate_partial_usage`` divide by zero on every incomplete report.
USAGE_ESTIMATED_BYTES_PER_INPUT_TOKEN = max(
    1, int(os.getenv("GPUSTACK_USAGE_ESTIMATED_BYTES_PER_INPUT_TOKEN", 4))
)
USAGE_ESTIMATED_TOKENS_PER_OUTPUT_CHUNK = max(
    1, int(os.getenv("GPUSTACK_USAGE_ESTIMATED_TOKENS_PER_OUTPUT_CHUNK", 1))
)

# Usage details archival.
# Rows in ``model_usage_details`` older than the retention threshold (anchored
# on COALESCE(completed_at, created_at)) are moved to
# ``model_usage_details_archive`` by a leader-only background controller.
# The controller runs once on server startup and then on the configured cron
# schedule (UTC). Default ``0 3 * * *`` = daily at 03:00 UTC — picked to land
# in a typical off-peak window for most regions.
USAGE_DETAILS_RETENTION_MONTHS = int(
    os.getenv("GPUSTACK_USAGE_DETAILS_RETENTION_MONTHS", 13)
)
USAGE_DETAILS_ARCHIVE_CRON = os.getenv(
    "GPUSTACK_USAGE_DETAILS_ARCHIVE_CRON", "0 3 * * *"
)
# Per-batch row count for archival moves. Smaller batches keep transactions
# short on environments with replication lag concerns; larger batches reduce
# round-trip overhead.
USAGE_DETAILS_ARCHIVE_BATCH_SIZE = int(
    os.getenv("GPUSTACK_USAGE_DETAILS_ARCHIVE_BATCH_SIZE", 1000)
)

# Hard cap on the in-memory ``gateway_details_buffer`` (per-request audit
# rows held between flushes). Bounds memory growth when flushes fail
# persistently (DB down, schema drift) and the failure-path re-buffer keeps
# piling up alongside new ingest. Oldest entries are dropped on overflow
# with a warning log; the rollup buffer is naturally bounded by key
# cardinality so it does not need a separate cap.
USAGE_DETAILS_BUFFER_MAX_SIZE = int(
    os.getenv("GPUSTACK_USAGE_DETAILS_BUFFER_MAX_SIZE", 100000)
)

DEFAULT_CLUSTER_KUBERNETES = (
    os.getenv("GPUSTACK_DEFAULT_CLUSTER_KUBERNETES", "false").lower() == "true"
)

# Benchmark configuration
BENCHMARK_DATASET_SHAREGPT_PATH = os.getenv(
    "GPUSTACK_BENCHMARK_DATASET_SHAREGPT_PATH",
    "/workspace/benchmark-runner/sharegpt_data/ShareGPT_V3_unfiltered_cleaned_split.json",
)
BENCHMARK_REQUEST_TIMEOUT = int(
    os.getenv("GPUSTACK_BENCHMARK_REQUEST_TIMEOUT", 3600)  # 1 hour
)  # in seconds