use std::time::Duration;

// mpsc channel capacity between ingest/API callers and the engine actor task.
pub const ENGINE_CHANNEL_CAPACITY: usize = 1024;

// Hard ceiling on how many params `auto_declare_params` will ever create automatically over the
// life of the engine, so one unusual input can't inflate the declared-param set forever.
pub const MAX_AUTO_DECLARED_PARAMS: usize = 64;

// Per-line ceiling on how many *new* params a single ingested line may contribute to the
// auto-derived set, so one unusually wide line can't burn the whole per-run budget at once.
pub const MAX_NEW_AUTO_PARAMS_PER_LINE: usize = 8;

// How long a sort helper index may sit unused before it's purged and left to rebuild on demand.
pub const SORT_HELPER_INDEX_PURGE_AFTER: Duration = Duration::from_secs(300);

// Window and capacity for the rolling ingestion-to-engine-processing lag high watermark.
pub const INGEST_LAG_WATERMARK_WINDOW_MS: i64 = 5000;
pub const INGEST_LAG_WATERMARK_MAX_ENTRIES: usize = 5;

// Bucket width used to merge multiple sub-series into one combined time series.
pub const MERGE_WINDOW_MS: i64 = 1_000;

// Default timeline query bucket width when the caller doesn't specify one.
pub const DEFAULT_TIMELINE_BUCKET_MS: i64 = 1_000;

// Reserved param names usable without declaring anything (ottyl-synthesized columns).
pub const OTTYL_RESERVED_PARAM_NAMES: [&str; 3] = ["ottyl_seq", "ottyl_ts", "ottyl_fmt"];

// Idle poll cadence while tailing stdin/a file for new log lines.
pub const STDIN_POLL_INTERVAL: Duration = Duration::from_millis(200);

// Poll cadence for a configured Prometheus/OpenMetrics `--metrics-url`.
pub const METRICS_POLL_INTERVAL: Duration = Duration::from_secs(15);

// Column-splitting regex fragments for the fixed-width logfmt column parser.
pub const COLUMN_SEPARATOR_PATTERN: &str = r"(?:\t|[ \t]{2,})";
pub const COLUMN_VALUE_PATTERN: &str = r"\S+(?: \S+)*";

// Name of the always-present profile every Settings file is seeded with.
pub const DEFAULT_PROFILE_NAME: &str = "Default";

// Name/label of the metric the Default profile is seeded with.
pub const SEEDED_METRIC_NAME: &str = "log_category";
pub const SEEDED_METRIC_LABEL: &str = "category";

// Host the HTTP server binds to; port is user-configurable, host is not.
pub const DEFAULT_BIND_HOST: &str = "0.0.0.0";

// App identity used to resolve the OS-conventional settings directory, and the settings file name.
pub const APP_QUALIFIER: &str = "";
pub const APP_ORGANIZATION: &str = "";
pub const APP_NAME: &str = "ottyl";
pub const SETTINGS_FILE_NAME: &str = "settings.json";