import logging
import os
from typing import Dict, List, Optional
import pkg_resources

import ray._private.ray_constants as ray_constants
from ray._private.utils import (
    validate_node_labels,
)

logger = logging.getLogger(__name__)


class RayParams:
    """A class used to store the parameters used by Ray.

    Attributes:
        redis_address: The address of the Redis server to connect to. If
            this address is not provided, then this command will start Redis, a
            raylet, a plasma store, a plasma manager, and some workers.
            It will also kill these processes when Python exits.
        redis_port: The port that the primary Redis shard should listen
            to. If None, then it will fall back to
            ray._private.ray_constants.DEFAULT_PORT, or a random port if the default is
            not available.
        redis_shard_ports: A list of the ports to use for the non-primary Redis
            shards. If None, then it will fall back to the ports right after
            redis_port, or random ports if those are not available.
        num_cpus: Number of CPUs to configure the raylet with.
        num_gpus: Number of GPUs to configure the raylet with.
        resources: A dictionary mapping the name of a resource to the quantity
            of that resource available.
        labels: The key-value labels of the node.
        memory: Total available memory for workers requesting memory.
        object_store_memory: The amount of memory (in bytes) to start the
            object store with.
        redis_max_memory: The max amount of memory (in bytes) to allow redis
            to use, or None for no limit. Once the limit is exceeded, redis
            will start LRU eviction of entries. This only applies to the
            sharded redis tables (task and object tables).
        object_manager_port int: The port to use for the object manager.
        node_manager_port: The port to use for the node manager.
        gcs_server_port: The port to use for the GCS server.
        node_ip_address: The IP address of the node that we are on.
        raylet_ip_address: The IP address of the raylet that this node
            connects to.
        min_worker_port: The lowest port number that workers will bind
            on. If not set or set to 0, random ports will be chosen.
        max_worker_port: The highest port number that workers will bind
            on. If set, min_worker_port must also be set.
        worker_port_list: An explicit list of ports to be used for
            workers (comma-separated). Overrides min_worker_port and
            max_worker_port.
        ray_client_server_port: The port number the ray client server
            will bind on. If not set, the ray client server will not
            be started.
        object_ref_seed: Used to seed the deterministic generation of
            object refs. The same value can be used across multiple runs of the
            same job in order to generate the object refs in a consistent
            manner. However, the same ID should not be used for different jobs.
        redirect_output: True if stdout and stderr for non-worker
            processes should be redirected to files and false otherwise.
        external_addresses: The address of external Redis server to
            connect to, in format of "ip1:port1,ip2:port2,...".  If this
            address is provided, then ray won't start Redis instances in the
            head node but use external Redis server(s) instead.
        num_redis_shards: The number of Redis shards to start in addition to
            the primary Redis shard.
        redis_max_clients: If provided, attempt to configure Redis with this
            maxclients number.
        redis_password: Prevents external clients without the password
            from connecting to Redis if provided.
        plasma_directory: A directory where the Plasma memory mapped files will
            be created.
        worker_path: The path of the source code that will be run by the
            worker.
        setup_worker_path: The path of the Python file that will set up
            the environment for the worker process.
        huge_pages: Boolean flag indicating whether to start the Object
            Store with hugetlbfs support. Requires plasma_directory.
        include_dashboard: Boolean flag indicating whether to start the web
            UI, which displays the status of the Ray cluster. If this value is
            None, then the UI will be started if the relevant dependencies are
            present.
        dashboard_host: The host to bind the web UI server to. Can either be
            localhost (127.0.0.1) or 0.0.0.0 (available from all interfaces).
            By default, this is set to localhost to prevent access from
            external machines.
        dashboard_port: The port to bind the dashboard server to.
            Defaults to 8265.
        dashboard_agent_listen_port: The port for dashboard agents to listen on
            for HTTP requests.
            Defaults to 52365.
        dashboard_grpc_port: The port for the dashboard head process to listen
            for gRPC on.
            Defaults to random available port.
        plasma_store_socket_name: If provided, it will specify the socket
            name used by the plasma store.
        raylet_socket_name: If provided, it will specify the socket path
            used by the raylet process.
        temp_dir: If provided, it will specify the root temporary
            directory for the Ray process. Must be an absolute path.
        storage: Specify a URI for persistent cluster-wide storage. This storage path
            must be accessible by all nodes of the cluster, otherwise an error will be
            raised.
        runtime_env_dir_name: If provided, specifies the directory that
            will be created in the session dir to hold runtime_env files.
        include_log_monitor: If True, then start a log monitor to
            monitor the log files for all processes on this node and push their
            contents to Redis.
        autoscaling_config: path to autoscaling config file.
        metrics_agent_port: The port to bind metrics agent.
        metrics_export_port: The port at which metrics are exposed
            through a Prometheus endpoint.
        no_monitor: If True, the ray autoscaler monitor for this cluster
            will not be started.
        _system_config: Configuration for overriding RayConfig
            defaults. Used to set system configuration and for experimental Ray
            core feature flags.
        enable_object_reconstruction: Enable plasma reconstruction on
            failure.
        ray_debugger_external: If true, make the Ray debugger for a
            worker available externally to the node it is running on. This will
            bind on 0.0.0.0 instead of localhost.
        env_vars: Override environment variables for the raylet.
        session_name: The name of the session of the ray cluster.
        webui: The url of the UI.
    """

    def __init__(
        self,
        redis_address: Optional[str] = None,
        gcs_address: Optional[str] = None,
        num_cpus: Optional[int] = None,
        num_gpus: Optional[int] = None,
        resources: Optional[Dict[str, float]] = None,
        labels: Optional[Dict[str, str]] = None,
        memory: Optional[float] = None,
        object_store_memory: Optional[float] = None,
        redis_max_memory: Optional[float] = None,
        redis_port: Optional[int] = None,
        redis_shard_ports: Optional[List[int]] = None,
        object_manager_port: Optional[int] = None,
        node_manager_port: int = 0,
        gcs_server_port: Optional[int] = None,
        node_ip_address: Optional[str] = None,
        node_name: Optional[str] = None,
        raylet_ip_address: Optional[str] = None,
        min_worker_port: Optional[int] = None,
        max_worker_port: Optional[int] = None,
        worker_port_list: Optional[List[int]] = None,
        ray_client_server_port: Optional[int] = None,
        object_ref_seed: Optional[int] = None,
        driver_mode=None,
        redirect_output: Optional[bool] = None,
        external_addresses: Optional[List[str]] = None,
        num_redis_shards: Optional[int] = None,
        redis_max_clients: Optional[int] = None,
        redis_password: Optional[str] = ray_constants.REDIS_DEFAULT_PASSWORD,
        plasma_directory: Optional[str] = None,
        worker_path: Optional[str] = None,
        setup_worker_path: Optional[str] = None,
        huge_pages: Optional[bool] = False,
        include_dashboard: Optional[bool] = None,
        dashboard_host: Optional[str] = ray_constants.DEFAULT_DASHBOARD_IP,
        dashboard_port: Optional[bool] = ray_constants.DEFAULT_DASHBOARD_PORT,
        dashboard_agent_listen_port: Optional[
            int
        ] = ray_constants.DEFAULT_DASHBOARD_AGENT_LISTEN_PORT,
        dashboard_grpc_port: Optional[int] = None,
        plasma_store_socket_name: Optional[str] = None,
        raylet_socket_name: Optional[str] = None,
        temp_dir: Optional[str] = None,
        storage: Optional[str] = None,
        runtime_env_dir_name: Optional[str] = None,
        include_log_monitor: Optional[str] = None,
        autoscaling_config: Optional[str] = None,
        ray_debugger_external: bool = False,
        _system_config: Optional[Dict[str, str]] = None,
        enable_object_reconstruction: Optional[bool] = False,
        metrics_agent_port: Optional[int] = None,
        metrics_export_port: Optional[int] = None,
        tracing_startup_hook=None,
        no_monitor: Optional[bool] = False,
        env_vars: Optional[Dict[str, str]] = None,
        session_name: Optional[str] = None,
        webui: Optional[str] = None,
    ):
        self.redis_address = redis_address
        self.gcs_address = gcs_address
        self.num_cpus = num_cpus
        self.num_gpus = num_gpus
        self.memory = memory
        self.object_store_memory = object_store_memory
        self.resources = resources
        self.redis_max_memory = redis_max_memory
        self.redis_port = redis_port
        self.redis_shard_ports = redis_shard_ports
        self.object_manager_port = object_manager_port
        self.node_manager_port = node_manager_port
        self.gcs_server_port = gcs_server_port
        self.node_ip_address = node_ip_address
        self.node_name = node_name
        self.raylet_ip_address = raylet_ip_address
        self.min_worker_port = min_worker_port
        self.max_worker_port = max_worker_port
        self.worker_port_list = worker_port_list
        self.ray_client_server_port = ray_client_server_port
        self.driver_mode = driver_mode
        self.redirect_output = redirect_output
        self.external_addresses = external_addresses
        self.num_redis_shards = num_redis_shards
        self.redis_max_clients = redis_max_clients
        self.redis_password = redis_password
        self.plasma_directory = plasma_directory
        self.worker_path = worker_path
        self.setup_worker_path = setup_worker_path
        self.huge_pages = huge_pages
        self.include_dashboard = include_dashboard
        self.dashboard_host = dashboard_host
        self.dashboard_port = dashboard_port
        self.dashboard_agent_listen_port = dashboard_agent_listen_port
        self.dashboard_grpc_port = dashboard_grpc_port
        self.plasma_store_socket_name = plasma_store_socket_name
        self.raylet_socket_name = raylet_socket_name
        self.temp_dir = temp_dir
        self.storage = storage or os.environ.get(
            ray_constants.RAY_STORAGE_ENVIRONMENT_VARIABLE
        )
        self.runtime_env_dir_name = (
            runtime_env_dir_name or ray_constants.DEFAULT_RUNTIME_ENV_DIR_NAME
        )
        self.include_log_monitor = include_log_monitor
        self.autoscaling_config = autoscaling_config
        self.metrics_agent_port = metrics_agent_port
        self.metrics_export_port = metrics_export_port
        self.tracing_startup_hook = tracing_startup_hook
        self.no_monitor = no_monitor
        self.object_ref_seed = object_ref_seed
        self.ray_debugger_external = ray_debugger_external
        self.env_vars = env_vars
        self.session_name = session_name
        self.webui = webui
        self._system_config = _system_config or {}
        self._enable_object_reconstruction = enable_object_reconstruction
        self.labels = labels
        self._check_usage()

        # Set the internal config options for object reconstruction.
        if enable_object_reconstruction:
            # Turn off object pinning.
            if self._system_config is None:
                self._system_config = dict()
            print(self._system_config)
            self._system_config["lineage_pinning_enabled"] = True

    def update(self, **kwargs):
        """Update the settings according to the keyword arguments.

        Args:
            kwargs: The keyword arguments to set corresponding fields.
        """
        for arg in kwargs:
            if hasattr(self, arg):
                setattr(self, arg, kwargs[arg])
            else:
                raise ValueError(f"Invalid RayParams parameter in update: {arg}")

        self._check_usage()

    def update_if_absent(self, **kwargs):
        """Update the settings when the target fields are None.

        Args:
            kwargs: The keyword arguments to set corresponding fields.
        """
        for arg in kwargs:
            if hasattr(self, arg):
                if getattr(self, arg) is None:
                    setattr(self, arg, kwargs[arg])
            else:
                raise ValueError(
                    f"Invalid RayParams parameter in update_if_absent: {arg}"
                )

        self._check_usage()

    def update_pre_selected_port(self):
        """Update the pre-selected port information

        Returns:
            The dictionary mapping of component -> ports.
        """

        def wrap_port(port):
            # 0 port means select a random port for the grpc server.
            if port is None or port == 0:
                return []
            else:
                return [port]

        # Create a dictionary of the component -> port mapping.
        pre_selected_ports = {
            "gcs": wrap_port(self.redis_port),
            "object_manager": wrap_port(self.object_manager_port),
            "node_manager": wrap_port(self.node_manager_port),
            "gcs_server": wrap_port(self.gcs_server_port),
            "client_server": wrap_port(self.ray_client_server_port),
            "dashboard": wrap_port(self.dashboard_port),
            "dashboard_agent_grpc": wrap_port(self.metrics_agent_port),
            "dashboard_agent_http": wrap_port(self.dashboard_agent_listen_port),
            "dashboard_grpc": wrap_port(self.dashboard_grpc_port),
            "metrics_export": wrap_port(self.metrics_export_port),
        }
        redis_shard_ports = self.redis_shard_ports
        if redis_shard_ports is None:
            redis_shard_ports = []
        pre_selected_ports["redis_shards"] = redis_shard_ports
        if self.worker_port_list is None:
            if self.min_worker_port is not None and self.max_worker_port is not None:
                pre_selected_ports["worker_ports"] = list(
                    range(self.min_worker_port, self.max_worker_port + 1)
                )
            else:
                # The dict is not updated when it requires random ports.
                pre_selected_ports["worker_ports"] = []
        else:
            pre_selected_ports["worker_ports"] = [
                int(port) for port in self.worker_port_list.split(",")
            ]

        # Update the pre selected port set.
        self.reserved_ports = set()
        for comp, port_list in pre_selected_ports.items():
            for port in port_list:
                if port in self.reserved_ports:
                    raise ValueError(
                        f"Ray component {comp} is trying to use "
                        f"a port number {port} that is used by other components.\n"
                        f"Port information: {self._format_ports(pre_selected_ports)}\n"
                        "If you allocate ports, please make sure the same port "
                        "is not used by multiple components."
                    )
                self.reserved_ports.add(port)

    def _check_usage(self):
        if self.worker_port_list is not None:
            for port_str in self.worker_port_list.split(","):
                try:
                    port = int(port_str)
                except ValueError as e:
                    raise ValueError(
                        "worker_port_list must be a comma-separated "
                        f"list of integers: {e}"
                    ) from None

                if port < 1024 or port > 65535:
                    raise ValueError(
                        "Ports in worker_port_list must be "
                        f"between 1024 and 65535. Got: {port}"
                    )

        # Used primarily for testing.
        if os.environ.get("RAY_USE_RANDOM_PORTS", False):
            if self.min_worker_port is None and self.max_worker_port is None:
                self.min_worker_port = 0
                self.max_worker_port = 0

        if self.min_worker_port is not None:
            if self.min_worker_port != 0 and (
                self.min_worker_port < 1024 or self.min_worker_port > 65535
            ):
                raise ValueError(
                    "min_worker_port must be 0 or an integer between 1024 and 65535."
                )

        if self.max_worker_port is not None:
            if self.min_worker_port is None:
                raise ValueError(
                    "If max_worker_port is set, min_worker_port must also be set."
                )
            elif self.max_worker_port != 0:
                if self.max_worker_port < 1024 or self.max_worker_port > 65535:
                    raise ValueError(
                        "max_worker_port must be 0 or an integer between "
                        "1024 and 65535."
                    )
                elif self.max_worker_port <= self.min_worker_port:
                    raise ValueError(
                        "max_worker_port must be higher than min_worker_port."
                    )

        if self.ray_client_server_port is not None:
            if (
                self.ray_client_server_port < 1024
                or self.ray_client_server_port > 65535
            ):
                raise ValueError(
                    "ray_client_server_port must be an integer "
                    "between 1024 and 65535."
                )

        if self.resources is not None:

            def build_error(resource, alternative):
                return (
                    f"{self.resources} -> `{resource}` cannot be a "
                    "custom resource because it is one of the default resources "
                    f"({ray_constants.DEFAULT_RESOURCES}). "
                    f"Use `{alternative}` instead. For example, use `ray start "
                    f"--{alternative.replace('_', '-')}=1` instead of "
                    f"`ray start --resources={{'{resource}': 1}}`"
                )

            assert "CPU" not in self.resources, build_error("CPU", "num_cpus")
            assert "GPU" not in self.resources, build_error("GPU", "num_gpus")
            assert "memory" not in self.resources, build_error("memory", "memory")
            assert "object_store_memory" not in self.resources, build_error(
                "object_store_memory", "object_store_memory"
            )

        if self.redirect_output is not None:
            raise DeprecationWarning("The redirect_output argument is deprecated.")

        # Parse the numpy version.
        numpy_version = pkg_resources.get_distribution("numpy").version.split(".")
        numpy_major, numpy_minor = int(numpy_version[0]), int(numpy_version[1])
        if numpy_major <= 1 and numpy_minor < 16:
            logger.warning(
                "Using ray with numpy < 1.16.0 will result in slow "
                "serialization. Upgrade numpy if using with ray."
            )

        if self.temp_dir is not None and not os.path.isabs(self.temp_dir):
            raise ValueError("temp_dir must be absolute path or None.")

        validate_node_labels(self.labels)

    def _format_ports(self, pre_selected_ports):
        """Format the pre-selected ports information to be more human-readable."""
        ports = pre_selected_ports.copy()

        for comp, port_list in ports.items():
            if len(port_list) == 1:
                ports[comp] = port_list[0]
            elif len(port_list) == 0:
                # Nothing is selected, meaning it will be randomly selected.
                ports[comp] = "random"
            elif comp == "worker_ports":
                min_port = port_list[0]
                max_port = port_list[len(port_list) - 1]
                if len(port_list) < 50:
                    port_range_str = str(port_list)
                else:
                    port_range_str = f"from {min_port} to {max_port}"
                ports[comp] = f"{len(port_list)} ports {port_range_str}"
        return ports
