<?php

return [
    /*
    |--------------------------------------------------------------------------
    | 上游数据库本机回退配置
    |--------------------------------------------------------------------------
    |
    | 标准模式从系统数据库的 system_database_connections 读取完整配置。
    | 下面的环境变量只用于隔离排错或尚未迁移的旧环境；只有显式开启
    | UPSTREAM_LOCAL_CONFIG_ENABLED 后才会覆盖共享配置。凭据不得进 Git。
    |
    */
    'enabled' => filter_var(env('JIANSUN_ENABLED', false), FILTER_VALIDATE_BOOL),

    // 仅作为本机回退范围；共享模式优先读取系统数据库中的 allowed_scopes。
    'allowed_scopes' => array_values(array_filter(array_map(
        'trim',
        explode(',', (string) env('JIANSUN_ALLOWED_SCOPES', ''))
    ))),

    'connection' => [
        'host' => env('DB_JIANSUN_HOST'),
        'port' => (int) env('DB_JIANSUN_PORT', 1433),
        'database' => env('DB_JIANSUN_DATABASE'),
        'username' => env('DB_JIANSUN_USERNAME'),
        'password' => env('DB_JIANSUN_PASSWORD'),
        'odbc_driver' => env(
            'DB_JIANSUN_ODBC_DRIVER',
            PHP_OS_FAMILY === 'Windows' ? 'ODBC Driver 18 for SQL Server' : 'FreeTDS'
        ),
        'tds_version' => env('DB_JIANSUN_TDS_VERSION', '7.4'),
        // 旧 SQL Server 的可选 TLS 预登录不稳定；仅本地开发默认关闭协商。
        'encryption' => env(
            'DB_JIANSUN_ENCRYPTION',
            env('APP_ENV', 'production') === 'production' ? 'request' : 'off'
        ),
        'connect_timeout' => (int) env('DB_JIANSUN_CONNECT_TIMEOUT', 5),
        'query_timeout' => (int) env('DB_JIANSUN_QUERY_TIMEOUT', 15),
    ],

    /*
    |--------------------------------------------------------------------------
    | 活跃查询快照
    |--------------------------------------------------------------------------
    |
    | 页面优先读取持久化在共享系统数据库中的快照；快照过期后先返回旧值，
    | 再由后台刷新。相同数据范围和筛选条件复用同一快照，与账户数量无关。
    | 同一查询只允许一个刷新任务，不同查询最多占用少量上游槽位，并受
    | 每分钟预算、慢查询冷却和连接失败熔断共同保护。
    |
    */
    'snapshots' => [
        'ttl_seconds' => (int) env('JIANSUN_SNAPSHOT_TTL', 120),
        'summary_ttl_seconds' => (int) env('JIANSUN_SUMMARY_TTL', 120),
        'options_ttl_seconds' => (int) env('JIANSUN_OPTIONS_TTL', 3600),
        'stale_ttl_seconds' => (int) env('JIANSUN_STALE_TTL', 86400),
        'active_ttl_seconds' => (int) env('JIANSUN_ACTIVE_QUERY_TTL', 21600),
        'registry_limit' => (int) env('JIANSUN_ACTIVE_QUERY_LIMIT', 300),
        'refresh_limit' => (int) env('JIANSUN_REFRESH_LIMIT', 2),
        'miss_budget_per_window' => (int) env('JIANSUN_MISS_BUDGET', 6),
        'budget_window_seconds' => (int) env('JIANSUN_BUDGET_WINDOW', 60),
        'lock_seconds' => (int) env('JIANSUN_LOCK_SECONDS', 45),
        'lock_wait_seconds' => (int) env('JIANSUN_LOCK_WAIT', 3),
        'max_concurrency' => (int) env('JIANSUN_MAX_CONCURRENCY', 2),
        'slot_wait_ms' => (int) env('JIANSUN_SLOT_WAIT_MS', 1500),
        'failure_cooldown_seconds' => (int) env('JIANSUN_FAILURE_COOLDOWN', 300),
        'query_failure_cooldown_seconds' => (int) env('JIANSUN_QUERY_FAILURE_COOLDOWN', 300),
        'slow_query_ms' => (int) env('JIANSUN_SLOW_QUERY_MS', 5000),
        'slow_query_cooldown_seconds' => (int) env('JIANSUN_SLOW_QUERY_COOLDOWN', 300),
        'refresh_time_budget_seconds' => (int) env('JIANSUN_REFRESH_TIME_BUDGET', 45),
        'refresh_pause_ms' => (int) env('JIANSUN_REFRESH_PAUSE_MS', 300),
    ],
];