<?php

return [

    /*
    |--------------------------------------------------------------------------
    | Decision-rule defaults (Phase 0 calibrated)
    |--------------------------------------------------------------------------
    |
    | 360,000 null-effect simulations (see stats/calibration_results.json)
    | identified this tuple as the closest empirical false-positive rate to
    | 5% without exceeding it. The plan's draft values (0.95 / 1000 / 15min)
    | delivered 66% empirical FP — well outside any defensible target. These
    | are inherited by new experiments unless overridden in
    | `experiments.decision_rule`.
    |
    */
    'defaults' => [
        'posterior_threshold' => env('SPLITSTREAM_DEFAULT_POSTERIOR_THRESHOLD', 0.995),
        'min_sample_per_variant' => env('SPLITSTREAM_DEFAULT_MIN_SAMPLE_PER_VARIANT', 20000),
        'snapshot_cadence_minutes' => env('SPLITSTREAM_DEFAULT_SNAPSHOT_CADENCE_MINUTES', 240),
    ],

    /*
    |--------------------------------------------------------------------------
    | Analysis worker
    |--------------------------------------------------------------------------
    |
    | The analysis worker iterates active experiments every cadence_minutes,
    | up to max_concurrent_per_tick experiments in parallel with a
    | per_experiment_timeout_seconds budget each. Snapshots that hit the
    | timeout are written with status='timeout' and retried on the next tick.
    |
    | Test env override: set SPLITSTREAM_ANALYSIS_CADENCE_SECONDS to drop the
    | cadence to a few seconds so Playwright tests can assert "the dashboard
    | visibly updates" deterministically.
    |
    */
    'analysis' => [
        'cadence_seconds_override' => env('SPLITSTREAM_ANALYSIS_CADENCE_SECONDS'),
        'max_concurrent_per_tick' => 4,
        'per_experiment_timeout_seconds' => 30,
        'monte_carlo_draws' => 10000,
    ],

    /*
    |--------------------------------------------------------------------------
    | Event ingest
    |--------------------------------------------------------------------------
    */
    'ingest' => [
        'redis_buffer_max' => 100000,
        'buffer_key_prefix' => 'ss:ingest:buffer:',
        'dedup_key_prefix' => 'ss:ingest:dedup:',
        'dedup_ttl_seconds' => 30 * 24 * 60 * 60, // 30 days — covers late-event window
        'late_event_window_days' => 7, // accepted + counted as late
        'too_late_window_days' => 30,  // accepted; older rejected with 412
        'batch_size' => 500,
    ],

    /*
    |--------------------------------------------------------------------------
    | API key verification
    |--------------------------------------------------------------------------
    */
    'api_keys' => [
        'pepper' => env('APP_KEY_PEPPER'),
        // Octane workers cache verified-by-Argon2 keys for the worker
        // lifetime so the Argon2 cost amortizes across requests.
        'octane_cache_ttl_seconds' => 3600,
    ],

];