import logging
from typing import List, Optional, Dict, Any, Union
from pydantic import BaseModel, Field
from typing import Any
from enum import Enum
from constant import Constants
import requests

# Enum for instance status
class InstanceStatus(Enum):
    CREATED = 0
    DEPLOYED = 1
    STARTING = 2
    RUNNING = 3
    ERRORED = 4
    TERMINATING = 5
    TERMINATED = 6
    STOPPING = 7
    STOPPED = 8


class Timestamp(BaseModel):
    seconds: int
    nanos: int

# GPU model
class GPUInfo(BaseModel):
    model: str

# Port info
class PortInfo(BaseModel):
    protocol: str
    container_port: int
    node_port: int

class InstanceSpending(BaseModel):
    instance_id: str
    hourly_price: float
    total_spend: float

# InstanceInfo for GET method
class InstanceInfo(BaseModel):  # New fields added
    id: Optional[str] = None
    deployment_id: Optional[str] = None
    name: Optional[str] = None
    user_id: Optional[str] = None
    container_image: Optional[str] = None
    status: Optional[InstanceStatus] = None
    status_string: Optional[str] = None
    additional_info: Optional[str] = None
    type: Optional[int] = None
    created_at: Optional[Timestamp] = None
    updated_at: Optional[Timestamp] = None
    ready_at: Optional[Timestamp] = None
    stopped_at: Optional[Timestamp] = None
    cpu: Optional[int] = None
    memory: Optional[int] = None
    gpu: Optional[List[GPUInfo]] = None
    disk: Optional[int] = None
    bandwidth: Optional[int] = None
    ssh_key_id: Optional[str] = None
    location: Optional[str] = None
    ports: Optional[Dict[str, PortInfo]] = None
    hive_environment_variables: Optional[Dict[str, Any]] = None
    environment_variables: Optional[Dict[str, Any]] = None
    runtime: Optional[int] = None
    spending: Optional[InstanceSpending] = None
    def __init__(self, **data):
        super().__init__(**data)
        if self.status_string is None and isinstance(self.status, InstanceStatus):
            self.status_string = self.status.name

# Spending info model
class InstanceSpending(BaseModel):
    instance_id: str
    hourly_price: float
    total_spend: float


# Configuration mappings based on the UI tables
GPU_CONFIGS = {
    "1x RTX 4090": {
        "gpu": ["RTX 4090"],
        "cpu": 8,
        "memory": 48,
        "disk": 250,
        "bandwidth": 1000
    },
    "2x RTX 4090": {
        "gpu": ["RTX 4090", "RTX 4090"],
        "cpu": 16,
        "memory": 96,
        "disk": 500,
        "bandwidth": 1000
    },
    "4x RTX 4090": {
        "gpu": ["RTX 4090", "RTX 4090", "RTX 4090", "RTX 4090"],
        "cpu": 32,
        "memory": 192,
        "disk": 1000,
        "bandwidth": 1000
    },
    "8x RTX 4090": {
        "gpu": ["RTX 4090", "RTX 4090", "RTX 4090", "RTX 4090", 
                "RTX 4090", "RTX 4090", "RTX 4090", "RTX 4090"],
        "cpu": 64,
        "memory": 384,
        "disk": 2000,
        "bandwidth": 1000
    },
    "1x RTX 5090": {
        "gpu": ["RTX 5090"],
        "cpu": 8,
        "memory": 48,
        "disk": 250,
        "bandwidth": 1000
    },
    "2x RTX 5090": {
        "gpu": ["RTX 5090", "RTX 5090"],
        "cpu": 16,
        "memory": 96,
        "disk": 500,
        "bandwidth": 1000
    },
    "4x RTX 5090": {
        "gpu": ["RTX 5090", "RTX 5090", "RTX 5090", "RTX 5090"],
        "cpu": 32,
        "memory": 192,
        "disk": 1000,
        "bandwidth": 1000
    },
    "8x RTX 5090": {
        "gpu": ["RTX 5090", "RTX 5090", "RTX 5090", "RTX 5090",
                "RTX 5090", "RTX 5090", "RTX 5090", "RTX 5090"],
        "cpu": 64,
        "memory": 384,
        "disk": 2000,
        "bandwidth": 1000
    }
}

VCPU_CONFIGS = {
    "2vCPU": {
        "gpu": [],
        "cpu": 2,
        "memory": 4,
        "disk": 50,
        "bandwidth": 250
    },
    "4vCPU": {
        "gpu": [],
        "cpu": 4,
        "memory": 8,
        "disk": 100,
        "bandwidth": 250
    },
    "8vCPU": {
        "gpu": [],
        "cpu": 8,
        "memory": 16,
        "disk": 200,
        "bandwidth": 500
    },
    "16vCPU": {
        "gpu": [],
        "cpu": 16,
        "memory": 32,
        "disk": 400,
        "bandwidth": 1000
    },
    "32vCPU": {
        "gpu": [],
        "cpu": 32,
        "memory": 64,
        "disk": 800,
        "bandwidth": 1000
    }
}

# Location-GPU validation map (using API format - lowercase)
LOCATION_GPU_MAP = {
    "france": ["RTX 4090"],
    "uae": ["RTX 4090"],
    "texas": ["RTX 5090"],
    "uae-2": ["RTX 5090"]
}
    

class HiveComputeAPI:
    """
    A wrapper class that provides methods to interact with the Hive Compute API.
    """

    def __init__(self, base_url: str = Constants.HIVE_COMPUTE_BASE_API_URL, token: str = Constants.HIVE_COMPUTE_DEFAULT_API_TOKEN):
        """
        Initializes the HiveComputeAPI handler.

        Args:
            base_url (str): The base URL of the Hive Compute API.
            token (str): The authentication token for the Hive Compute API.
        Note: The ModelRouter will automatically refresh the map of served models upon initialization.
        """
        self.base_url = base_url.strip("/")
        self.token = token
        self.logger = logging.getLogger(__name__)
        
    def __fetch_instance_structure(self, instance_json) -> InstanceInfo:
        """
        Fetches the structure of an instance from the API.

        Returns:
            InstanceInfo: An InstanceInfo object representing the structure of an instance.
        """
        # Ensure instance_json is a dict
        if not isinstance(instance_json, dict):
            return {}
        # Convert only problematic fields
        if "status" in instance_json and not isinstance(instance_json["status"], InstanceStatus):
            try:
                instance_json["status"] = InstanceStatus(instance_json["status"])
            except Exception:
                instance_json["status"] = InstanceStatus.CREATED
        for field in ["created_at", "updated_at", "ready_at", "stopped_at"]:
            value = instance_json.get(field)
            if isinstance(value, dict):
                instance_json[field] = Timestamp(**value)
            else:
                instance_json[field] = None
        if "gpu" in instance_json:
            instance_json["gpu"] = [GPUInfo(**gpu) for gpu in instance_json.get("gpu", []) if isinstance(gpu, dict)]
        if "ports" in instance_json:
            instance_json["ports"] = {k: PortInfo(**v) for k, v in instance_json.get("ports", {}).items() if isinstance(v, dict)}
        return InstanceInfo(**instance_json)
         
    def get_all_instances(self) -> List[InstanceInfo]:
        """
        Fetches all compute instances for the authenticated user.

        Returns:
            List[InstanceInfo]: A list of InstanceInfo objects representing the user's compute instances.
        """
        try:
            response = requests.get(f"{self.base_url}/instances", headers={
                "Authorization": f"Bearer {self.token}"
            })
            response.raise_for_status()
            response_json = response.json()
            spending_map = response_json.get("spending", {})
            instances = []
            for inst in response_json.get("instances", []):
                inst_struct = self.__fetch_instance_structure(inst)
                spend = spending_map.get(inst.get("id"))
                if spend:
                    inst_struct.spending = InstanceSpending(**spend)
                instances.append(InstanceInfo.model_validate(inst_struct))
            return instances
        except requests.RequestException as e:
            self.logger.error(f"Failed to fetch instances: {e}")
            return []

    def create_instance(
        self,
        name: str = "default",
        location: str = "uae",  # Changed default to API format
        config: str = "1x RTX 4090",
        container_image: str = "Dockerfile.vulkan",
        tcp_ports: Optional[List[int]] = None,
        https_ports: Optional[List[int]] = None,
        udp_ports: Optional[List[int]] = None,
        launch_jupyter_notebook: bool = False,
        instance_type: int = 0,
        custom_config: Optional[Dict[str, Any]] = None
    ) -> Optional[Dict[str, Any]]:
        """
        Creates a new compute instance using predefined configurations or custom settings.

        Args:
            name (str): Name of the instance. Defaults to "default".
            location (str): Location where the instance will be deployed. Defaults to "uae".
                        Valid locations: france, uae, texas, uae-2
            config (str): Predefined configuration. Options:
                        GPU configs: "1x RTX 4090", "2x RTX 4090", "4x RTX 4090", "8x RTX 4090",
                                    "1x RTX 5090", "2x RTX 5090", "4x RTX 5090", "8x RTX 5090"
                        vCPU configs: "2vCPU", "4vCPU", "8vCPU", "16vCPU", "32vCPU"
                        Defaults to "1x RTX 4090".
            container_image (str): Docker container image to use. Defaults to "Dockerfile.vulkan".
            tcp_ports (List[int], optional): List of TCP ports to expose.
            https_ports (List[int], optional): List of HTTPS ports to expose.
            udp_ports (List[int], optional): List of UDP ports to expose.
            launch_jupyter_notebook (bool): Whether to launch Jupyter notebook. Defaults to False.
            instance_type (int): Type of instance. Defaults to 0.
            custom_config (Dict[str, Any], optional): Custom configuration to override defaults.
                                                    Keys: cpu, memory, disk, bandwidth, gpu

        Returns:
            Optional[Dict[str, Any]]: A dictionary with 'id' and 'status' keys if successful, None otherwise.
        
        Raises:
            ValueError: If configuration is invalid or GPU type not available in location.
        """
        # Combine all configs
        ALL_CONFIGS = {**GPU_CONFIGS, **VCPU_CONFIGS}
        
        # Validate configuration
        if config not in ALL_CONFIGS:
            available_configs = list(ALL_CONFIGS.keys())
            raise ValueError(
                f"Invalid config: {config}. Available configs: {available_configs}"
            )
        
        # Get base configuration
        instance_config = ALL_CONFIGS[config].copy()
        
        # Apply custom config if provided
        if custom_config:
            instance_config.update(custom_config)
        
        # Validate location
        if location not in LOCATION_GPU_MAP:
            raise ValueError(
                f"Invalid location: {location}. Valid locations: {list(LOCATION_GPU_MAP.keys())}"
            )
        
        # Validate GPU type for location (only if GPU instance)
        if instance_config["gpu"]:  # If not empty (i.e., GPU instance)
            gpu_type = instance_config["gpu"][0]  # Get the GPU model
            if gpu_type not in LOCATION_GPU_MAP[location]:
                raise ValueError(
                    f"GPU type '{gpu_type}' not available in location '{location}'. "
                    f"Available GPUs: {LOCATION_GPU_MAP[location]}"
                )
        
        # Build the payload - exact format matching the API request
        payload = {
            "bandwidth": instance_config["bandwidth"],
            "container_image": container_image,
            "cpu": instance_config["cpu"],
            "disk": instance_config["disk"],
            "gpu": instance_config["gpu"],
            "https_ports": https_ports if https_ports is not None else [8888],
            "launch_jupyter_notebook": launch_jupyter_notebook,
            "location": location,
            "memory": instance_config["memory"],
            "name": name,
            "tcp_ports": tcp_ports if tcp_ports is not None else [],
            "type": instance_type,
            "udp_ports": udp_ports if udp_ports is not None else []
        }
        
        # Log the payload for debugging
        self.logger.info(f"Creating instance with payload: {payload}")
        
        try:
            response = requests.post(
                f"{self.base_url}/instances/instance",
                headers={
                    "Authorization": f"Bearer {self.token}",
                    "Content-Type": "application/json"
                },
                json=payload
            )
            
            # Log response details for debugging
            self.logger.info(f"Response status code: {response.status_code}")
            if response.status_code != 200:
                self.logger.error(f"Response body: {response.text}")
            
            response.raise_for_status()

            response_data = response.json()
            instance_data = response_data.get("instance", {})
            return {
                "id": instance_data.get("id"),
                "status": instance_data.get("status")
            }

        except requests.RequestException as e:
            self.logger.error(f"Failed to create instance: {e}")
            if hasattr(e, 'response') and e.response is not None:
                self.logger.error(f"Response content: {e.response.text}")
            return None


    def get_available_locations(self, gpu_type: Optional[str] = None) -> List[str]:
        """
        Get available locations, optionally filtered by GPU type.
        
        Args:
            gpu_type (str, optional): GPU model to filter locations by.
        
        Returns:
            List[str]: List of available locations.
        """
        if gpu_type:
            return [loc for loc, gpus in LOCATION_GPU_MAP.items() if gpu_type in gpus]
        return list(LOCATION_GPU_MAP.keys())