/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.cassandra.config;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;

import com.google.common.base.Joiner;
import com.google.common.collect.Sets;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A class that contains configuration properties for the cassandra node it runs within.
 *
 * Properties declared as volatile can be mutated via JMX.
 */
public class Config
{
    private static final Logger logger = LoggerFactory.getLogger(Config.class);

    /*
     * Prefix for Java properties for internal Cassandra configuration options
     */
    public static final String PROPERTY_PREFIX = "cassandra.";

    public String cluster_name = "Test Cluster";
    public String authenticator;
    public String authorizer;
    public String role_manager;
    public volatile int permissions_validity_in_ms = 2000;
    public volatile int permissions_cache_max_entries = 1000;
    public volatile int permissions_update_interval_in_ms = -1;
    public volatile int roles_validity_in_ms = 2000;
    public volatile int roles_cache_max_entries = 1000;
    public volatile int roles_update_interval_in_ms = -1;
    public volatile int credentials_validity_in_ms = 2000;
    public volatile int credentials_cache_max_entries = 1000;
    public volatile int credentials_update_interval_in_ms = -1;

    /* Hashing strategy Random or OPHF */
    public String partitioner;

    public boolean auto_bootstrap = true;
    public volatile boolean hinted_handoff_enabled = true;
    public Set<String> hinted_handoff_disabled_datacenters = Sets.newConcurrentHashSet();
    public volatile int max_hint_window_in_ms = 3 * 3600 * 1000; // three hours
    public String hints_directory;

    public ParameterizedClass seed_provider;
    public DiskAccessMode disk_access_mode = DiskAccessMode.auto;

    public DiskFailurePolicy disk_failure_policy = DiskFailurePolicy.ignore;
    public CommitFailurePolicy commit_failure_policy = CommitFailurePolicy.stop;

    /* initial token in the ring */
    public String initial_token;
    public int num_tokens = 1;
    /** Triggers automatic allocation of tokens if set, using the replication strategy of the referenced keyspace */
    public String allocate_tokens_for_keyspace = null;

    public volatile long request_timeout_in_ms = 10000L;

    public volatile long read_request_timeout_in_ms = 5000L;

    public volatile long range_request_timeout_in_ms = 10000L;

    public volatile long write_request_timeout_in_ms = 2000L;

    public volatile long counter_write_request_timeout_in_ms = 5000L;

    public volatile long cas_contention_timeout_in_ms = 1000L;

    public volatile long truncate_request_timeout_in_ms = 60000L;

    /**
     * @deprecated use {@link this#streaming_keep_alive_period_in_secs} instead
     */
    @Deprecated
    public int streaming_socket_timeout_in_ms = 86400000; //24 hours

    public Integer streaming_keep_alive_period_in_secs = 300; //5 minutes

    public boolean cross_node_timeout = false;

    public volatile long slow_query_log_timeout_in_ms = 500L;

    public volatile double phi_convict_threshold = 8.0;

    public int concurrent_reads = 32;
    public int concurrent_writes = 32;
    public int concurrent_counter_writes = 32;
    public int concurrent_materialized_view_writes = 32;

    @Deprecated
    public Integer concurrent_replicates = null;

    public int memtable_flush_writers = 0;
    public Integer memtable_heap_space_in_mb;
    public Integer memtable_offheap_space_in_mb;
    public Float memtable_cleanup_threshold = null;

    // Limit the maximum depth of repair session merkle trees
    public volatile int repair_session_max_tree_depth = 18;

    public int storage_port = 7000;
    public int ssl_storage_port = 7001;
    public String listen_address;
    public String listen_interface;
    public boolean listen_interface_prefer_ipv6 = false;
    public String broadcast_address;
    public boolean listen_on_broadcast_address = false;
    public String internode_authenticator;

    /* intentionally left set to true, despite being set to false in stock 2.2 cassandra.yaml
       we don't want to surprise Thrift users who have the setting blank in the yaml during 2.1->2.2 upgrade */
    public boolean start_rpc = true;
    public String rpc_address;
    public String rpc_interface;
    public boolean rpc_interface_prefer_ipv6 = false;
    public String broadcast_rpc_address;
    public int rpc_port = 9160;
    public int rpc_listen_backlog = 50;
    public String rpc_server_type = "sync";
    public boolean rpc_keepalive = true;
    public int rpc_min_threads = 16;
    public int rpc_max_threads = Integer.MAX_VALUE;
    public Integer rpc_send_buff_size_in_bytes;
    public Integer rpc_recv_buff_size_in_bytes;
    public int internode_send_buff_size_in_bytes = 0;
    public int internode_recv_buff_size_in_bytes = 0;

    public boolean start_native_transport = false;
    public int native_transport_port = 9042;
    public Integer native_transport_port_ssl = null;
    public int native_transport_max_threads = 128;
    public int native_transport_max_frame_size_in_mb = 256;
    public volatile long native_transport_max_concurrent_connections = -1L;
    public volatile long native_transport_max_concurrent_connections_per_ip = -1L;
    public boolean native_transport_flush_in_batches_legacy = true;
    public volatile long native_transport_max_concurrent_requests_in_bytes_per_ip = -1L;
    public volatile long native_transport_max_concurrent_requests_in_bytes = -1L;
    public Integer native_transport_max_negotiable_protocol_version = Integer.MIN_VALUE;

    @Deprecated
    public int thrift_max_message_length_in_mb = 16;
    /**
     * Max size of values in SSTables, in MegaBytes.
     * Default is the same as the native protocol frame limit: 256Mb.
     * See AbstractType for how it is used.
     */
    public int max_value_size_in_mb = 256;

    public int thrift_framed_transport_size_in_mb = 15;
    public boolean snapshot_before_compaction = false;
    public boolean auto_snapshot = true;

    /* if the size of columns or super-columns are more than this, indexing will kick in */
    public int column_index_size_in_kb = 64;
    public int column_index_cache_size_in_kb = 2;
    public volatile int batch_size_warn_threshold_in_kb = 5;
    public volatile int batch_size_fail_threshold_in_kb = 50;
    public Integer unlogged_batch_across_partitions_warn_threshold = 10;
    public volatile Integer concurrent_compactors;
    public volatile int compaction_throughput_mb_per_sec = 16;
    public volatile int compaction_large_partition_warning_threshold_mb = 100;
    public int min_free_space_per_drive_in_mb = 50;

    /**
     * @deprecated retry support removed on CASSANDRA-10992
     */
    @Deprecated
    public int max_streaming_retries = 3;

    public volatile int stream_throughput_outbound_megabits_per_sec = 200;
    public volatile int inter_dc_stream_throughput_outbound_megabits_per_sec = 200;

    public String[] data_file_directories = new String[0];

    public String saved_caches_directory;

    // Commit Log
    public String commitlog_directory;
    public Integer commitlog_total_space_in_mb;
    public CommitLogSync commitlog_sync;
    public double commitlog_sync_batch_window_in_ms = Double.NaN;
    public int commitlog_sync_period_in_ms;
    public int commitlog_segment_size_in_mb = 32;
    public ParameterizedClass commitlog_compression;
    public int commitlog_max_compression_buffers_in_pool = 3;
    public TransparentDataEncryptionOptions transparent_data_encryption_options = new TransparentDataEncryptionOptions();

    public Integer max_mutation_size_in_kb;

    // Change-data-capture logs
    public boolean cdc_enabled = false;
    public String cdc_raw_directory;
    public int cdc_total_space_in_mb = 0;
    public int cdc_free_space_check_interval_ms = 250;

    @Deprecated
    public int commitlog_periodic_queue_size = -1;

    public String endpoint_snitch;
    public boolean dynamic_snitch = true;
    public int dynamic_snitch_update_interval_in_ms = 100;
    public int dynamic_snitch_reset_interval_in_ms = 600000;
    public double dynamic_snitch_badness_threshold = 0.1;

    public String request_scheduler;
    public RequestSchedulerId request_scheduler_id;
    public RequestSchedulerOptions request_scheduler_options;

    public EncryptionOptions.ServerEncryptionOptions server_encryption_options = new EncryptionOptions.ServerEncryptionOptions();
    public EncryptionOptions.ClientEncryptionOptions client_encryption_options = new EncryptionOptions.ClientEncryptionOptions();
    // this encOptions is for backward compatibility (a warning is logged by DatabaseDescriptor)
    public EncryptionOptions.ServerEncryptionOptions encryption_options;

    public InternodeCompression internode_compression = InternodeCompression.none;

    @Deprecated
    public Integer index_interval = null;

    public int hinted_handoff_throttle_in_kb = 1024;
    public int batchlog_replay_throttle_in_kb = 1024;
    public int max_hints_delivery_threads = 2;
    public int hints_flush_period_in_ms = 10000;
    public int max_hints_file_size_in_mb = 128;
    public ParameterizedClass hints_compression;
    public int sstable_preemptive_open_interval_in_mb = 50;

    public volatile boolean incremental_backups = false;
    public boolean trickle_fsync = false;
    public int trickle_fsync_interval_in_kb = 10240;

    public Long key_cache_size_in_mb = null;
    public volatile int key_cache_save_period = 14400;
    public volatile int key_cache_keys_to_save = Integer.MAX_VALUE;

    public String row_cache_class_name = "org.apache.cassandra.cache.OHCProvider";
    public long row_cache_size_in_mb = 0;
    public volatile int row_cache_save_period = 0;
    public volatile int row_cache_keys_to_save = Integer.MAX_VALUE;

    public Long counter_cache_size_in_mb = null;
    public volatile int counter_cache_save_period = 7200;
    public volatile int counter_cache_keys_to_save = Integer.MAX_VALUE;

    private static boolean isClientMode = false;
    private static Supplier<Config> overrideLoadConfig = null;

    public Integer file_cache_size_in_mb;

    /**
     * Because of the current {@link org.apache.cassandra.utils.memory.BufferPool} slab sizes of 64 kb, we
     * store in the file cache buffers that divide 64 kb, so we need to round the buffer sizes to powers of two.
     * This boolean controls weather they are rounded up or down. Set it to true to round up to the
     * next power of two, set it to false to round down to the previous power of two. Note that buffer sizes are
     * already rounded to 4 kb and capped between 4 kb minimum and 64 kb maximum by the {@link DiskOptimizationStrategy}.
     * By default, this boolean is set to round down when {@link #disk_optimization_strategy} is {@code ssd},
     * and to round up when it is {@code spinning}.
     */
    public Boolean file_cache_round_up;

    public boolean buffer_pool_use_heap_if_exhausted = true;

    public DiskOptimizationStrategy disk_optimization_strategy = DiskOptimizationStrategy.ssd;

    public double disk_optimization_estimate_percentile = 0.95;

    public double disk_optimization_page_cross_chance = 0.1;

    public boolean inter_dc_tcp_nodelay = true;

    public MemtableAllocationType memtable_allocation_type = MemtableAllocationType.heap_buffers;

    public volatile int tombstone_warn_threshold = 1000;
    public volatile int tombstone_failure_threshold = 100000;

    public volatile Long index_summary_capacity_in_mb;
    public volatile int index_summary_resize_interval_in_minutes = 60;

    public int gc_log_threshold_in_ms = 200;
    public int gc_warn_threshold_in_ms = 0;

    // TTL for different types of trace events.
    public int tracetype_query_ttl = (int) TimeUnit.DAYS.toSeconds(1);
    public int tracetype_repair_ttl = (int) TimeUnit.DAYS.toSeconds(7);

    /*
     * Strategy to use for coalescing messages in OutboundTcpConnection.
     * Can be fixed, movingaverage, timehorizon, disabled. Setting is case and leading/trailing
     * whitespace insensitive. You can also specify a subclass of CoalescingStrategies.CoalescingStrategy by name.
     */
    public String otc_coalescing_strategy = "DISABLED";

    /*
     * How many microseconds to wait for coalescing. For fixed strategy this is the amount of time after the first
     * message is received before it will be sent with any accompanying messages. For moving average this is the
     * maximum amount of time that will be waited as well as the interval at which messages must arrive on average
     * for coalescing to be enabled.
     */
    public static final int otc_coalescing_window_us_default = 200;
    public int otc_coalescing_window_us = otc_coalescing_window_us_default;
    public int otc_coalescing_enough_coalesced_messages = 8;

    /**
     * Backlog expiration interval in milliseconds for the OutboundTcpConnection.
     */
    public static final int otc_backlog_expiration_interval_ms_default = 200;
    public volatile int otc_backlog_expiration_interval_ms = otc_backlog_expiration_interval_ms_default;

    public int windows_timer_interval = 0;

    /**
     * Size of the CQL prepared statements cache in MB.
     * Defaults to 1/256th of the heap size or 10MB, whichever is greater.
     */
    public Long prepared_statements_cache_size_mb = null;
    /**
     * Size of the Thrift prepared statements cache in MB.
     * Defaults to 1/256th of the heap size or 10MB, whichever is greater.
     */
    public Long thrift_prepared_statements_cache_size_mb = null;

    public boolean enable_user_defined_functions = false;
    public boolean enable_scripted_user_defined_functions = false;

    public boolean enable_materialized_views = true;

    public boolean enable_sasi_indexes = true;

    /**
     * Optionally disable asynchronous UDF execution.
     * Disabling asynchronous UDF execution also implicitly disables the security-manager!
     * By default, async UDF execution is enabled to be able to detect UDFs that run too long / forever and be
     * able to fail fast - i.e. stop the Cassandra daemon, which is currently the only appropriate approach to
     * "tell" a user that there's something really wrong with the UDF.
     * When you disable async UDF execution, users MUST pay attention to read-timeouts since these may indicate
     * UDFs that run too long or forever - and this can destabilize the cluster.
     */
    public boolean enable_user_defined_functions_threads = true;
    /**
     * Time in milliseconds after a warning will be emitted to the log and to the client that a UDF runs too long.
     * (Only valid, if enable_user_defined_functions_threads==true)
     */
    public long user_defined_function_warn_timeout = 500;
    /**
     * Time in milliseconds after a fatal UDF run-time situation is detected and action according to
     * user_function_timeout_policy will take place.
     * (Only valid, if enable_user_defined_functions_threads==true)
     */
    public long user_defined_function_fail_timeout = 1500;
    /**
     * Defines what to do when a UDF ran longer than user_defined_function_fail_timeout.
     * Possible options are:
     * - 'die' - i.e. it is able to emit a warning to the client before the Cassandra Daemon will shut down.
     * - 'die_immediate' - shut down C* daemon immediately (effectively prevent the chance that the client will receive a warning).
     * - 'ignore' - just log - the most dangerous option.
     * (Only valid, if enable_user_defined_functions_threads==true)
     */
    public UserFunctionTimeoutPolicy user_function_timeout_policy = UserFunctionTimeoutPolicy.die;

    public volatile boolean back_pressure_enabled = false;
    public volatile ParameterizedClass back_pressure_strategy;

    /**
     * @deprecated migrate to {@link DatabaseDescriptor#isClientInitialized()}
     */
    @Deprecated
    public static boolean isClientMode()
    {
        return isClientMode;
    }

    /**
     * If true, when rows with duplicate clustering keys are detected during a read or compaction
     * a snapshot will be taken. In the read case, each a snapshot request will be issued to each
     * replica involved in the query, for compaction the snapshot will be created locally.
     * These are limited at the replica level so that only a single snapshot per-day can be taken
     * via this method.
     *
     * This requires check_for_duplicate_rows_during_reads and/or check_for_duplicate_rows_during_compaction
     * below to be enabled
     */
    public volatile boolean snapshot_on_duplicate_row_detection = false;
    /**
     * If these are enabled duplicate keys will get logged, and if snapshot_on_duplicate_row_detection
     * is enabled, the table will get snapshotted for offline investigation
     */
    public volatile boolean check_for_duplicate_rows_during_reads = true;
    public volatile boolean check_for_duplicate_rows_during_compaction = true;

    /**
     * Client mode means that the process is a pure client, that uses C* code base but does
     * not read or write local C* database files.
     *
     * @deprecated migrate to {@link DatabaseDescriptor#clientInitialization(boolean)}
     */
    @Deprecated
    public static void setClientMode(boolean clientMode)
    {
        isClientMode = clientMode;
    }

    public static Supplier<Config> getOverrideLoadConfig()
    {
        return overrideLoadConfig;
    }

    public static void setOverrideLoadConfig(Supplier<Config> loadConfig)
    {
        overrideLoadConfig = loadConfig;
    }

    public enum CommitLogSync
    {
        periodic,
        batch
    }
    public enum InternodeCompression
    {
        all, none, dc
    }

    public enum DiskAccessMode
    {
        auto,
        mmap,
        mmap_index_only,
        standard,
    }

    public enum MemtableAllocationType
    {
        unslabbed_heap_buffers,
        heap_buffers,
        offheap_buffers,
        offheap_objects
    }

    public enum DiskFailurePolicy
    {
        best_effort,
        stop,
        ignore,
        stop_paranoid,
        die
    }

    public enum CommitFailurePolicy
    {
        stop,
        stop_commit,
        ignore,
        die,
    }

    public enum UserFunctionTimeoutPolicy
    {
        ignore,
        die,
        die_immediate
    }

    public enum RequestSchedulerId
    {
        keyspace
    }

    public enum DiskOptimizationStrategy
    {
        ssd,
        spinning
    }

    private static final List<String> SENSITIVE_KEYS = new ArrayList<String>() {{
        add("client_encryption_options");
        add("server_encryption_options");
    }};

    public static void log(Config config)
    {
        Map<String, String> configMap = new TreeMap<>();
        for (Field field : Config.class.getFields())
        {
            // ignore the constants
            if (Modifier.isFinal(field.getModifiers()))
                continue;

            String name = field.getName();
            if (SENSITIVE_KEYS.contains(name))
            {
                configMap.put(name, "<REDACTED>");
                continue;
            }

            String value;
            try
            {
                // Field.get() can throw NPE if the value of the field is null
                value = field.get(config).toString();
            }
            catch (NullPointerException | IllegalAccessException npe)
            {
                value = "null";
            }
            configMap.put(name, value);
        }

        logger.info("Node configuration:[{}]", Joiner.on("; ").join(configMap.entrySet()));
    }
}