"""
RunPod Client - Low-level GraphQL API client for RunPod

Provides direct access to RunPod's GraphQL API for pod management.
"""

import os
import requests
from typing import Optional, List, Dict
from dataclasses import dataclass


@dataclass
class PodInfo:
    """Information about a RunPod pod"""
    id: str
    name: str
    status: str
    gpu_type: str
    gpu_count: int
    cost_per_hour: float
    runtime: Optional[Dict] = None


class RunPodClient:
    """Low-level client for RunPod GraphQL API"""

    def __init__(self, api_key: Optional[str] = None):
        self.api_key = api_key or os.getenv("RUNPOD_API_KEY")
        if not self.api_key:
            raise ValueError("RunPod API key required. Set RUNPOD_API_KEY environment variable.")

        self.endpoint = "https://api.runpod.io/graphql"
        self.headers = {
            "Content-Type": "application/json",
            "Authorization": f"Bearer {self.api_key}"
        }

    def _query(self, query: str, variables: Optional[Dict] = None) -> Dict:
        """Execute a GraphQL query"""
        payload = {
            "query": query,
            "variables": variables or {}
        }

        response = requests.post(
            self.endpoint,
            json=payload,
            headers=self.headers,
            timeout=30
        )

        if response.status_code != 200:
            raise Exception(f"GraphQL request failed: {response.status_code} {response.text}")

        return response.json()

    def list_pods(self) -> List[PodInfo]:
        """List all pods"""
        query = """
        query {
            myself {
                pods {
                    id
                    name
                    desiredStatus
                    runtime {
                        gpus {
                            id
                        }
                    }
                    machine {
                        podHostId
                    }
                    costPerHr
                    gpuCount
                }
            }
        }
        """

        result = self._query(query)

        if "errors" in result:
            print(f"Error listing pods: {result['errors']}")
            return []

        pods_data = result.get("data", {}).get("myself", {}).get("pods", [])
        pods = []

        for pod_data in pods_data:
            gpu_type = "GPU"  # Generic GPU type since API doesn't provide type details
            if pod_data.get("runtime") and pod_data["runtime"].get("gpus"):
                gpu_id = pod_data["runtime"]["gpus"][0].get("id", "")
                if gpu_id:
                    gpu_type = f"GPU-{gpu_id[:8]}"  # Use shortened GPU ID

            pods.append(PodInfo(
                id=pod_data["id"],
                name=pod_data["name"],
                status=pod_data.get("desiredStatus", "unknown"),
                gpu_type=gpu_type,
                gpu_count=pod_data.get("gpuCount", 0),
                cost_per_hour=pod_data.get("costPerHr", 0.0),
                runtime=pod_data.get("runtime")
            ))

        return pods

    def create_pod(
        self,
        name: str,
        image_name: str,
        gpu_type_id: str,
        gpu_count: int = 1,
        volume_in_gb: int = 100,
        container_disk_in_gb: int = 50,
        ports: str = "8888/http"
    ) -> Optional[str]:
        """Create a new pod"""
        query = """
        mutation($input: PodFindAndDeployOnDemandInput!) {
            podFindAndDeployOnDemand(input: $input) {
                id
                name
                desiredStatus
            }
        }
        """

        variables = {
            "input": {
                "name": name,
                "imageName": image_name,
                "gpuTypeId": gpu_type_id,
                "gpuCount": gpu_count,
                "volumeInGb": volume_in_gb,
                "containerDiskInGb": container_disk_in_gb,
                "ports": ports,
                "cloudType": "ALL"
            }
        }

        result = self._query(query, variables)

        if "errors" in result:
            print(f"Error creating pod: {result['errors']}")
            return None

        pod_data = result.get("data", {}).get("podFindAndDeployOnDemand")
        if pod_data:
            return pod_data["id"]

        return None

    def stop_pod(self, pod_id: str) -> bool:
        """Stop a running pod"""
        query = """
        mutation($input: PodStopInput!) {
            podStop(input: $input) {
                id
                desiredStatus
            }
        }
        """

        variables = {
            "input": {
                "podId": pod_id
            }
        }

        result = self._query(query, variables)

        if "errors" in result:
            print(f"Error stopping pod: {result['errors']}")
            return False

        return True

    def terminate_pod(self, pod_id: str) -> bool:
        """Terminate a pod"""
        query = """
        mutation($input: PodTerminateInput!) {
            podTerminate(input: $input)
        }
        """

        variables = {
            "input": {
                "podId": pod_id
            }
        }

        result = self._query(query, variables)

        if "errors" in result:
            print(f"Error terminating pod: {result['errors']}")
            return False

        return True

    def get_gpu_types(self) -> List[Dict]:
        """Get available GPU types"""
        query = """
        query {
            gpuTypes {
                id
                displayName
                memoryInGb
                secureCloud
                communityCloud
            }
        }
        """

        result = self._query(query)

        if "errors" in result:
            print(f"Error getting GPU types: {result['errors']}")
            return []

        gpu_types = result.get("data", {}).get("gpuTypes", [])
        return gpu_types

    def get_pod_details(self, pod_id: str) -> Optional[Dict]:
        """Get detailed information about a specific pod"""
        query = """
        query($podId: String!) {
            pod(input: {podId: $podId}) {
                id
                name
                desiredStatus
                runtime {
                    gpus {
                        id
                    }
                    ports {
                        ip
                        isIpPublic
                        privatePort
                        publicPort
                        type
                    }
                }
                machine {
                    podHostId
                }
                gpuCount
                costPerHr
            }
        }
        """

        variables = {"podId": pod_id}
        result = self._query(query, variables)

        if "errors" in result:
            print(f"Error getting pod details: {result['errors']}")
            return None

        return result.get("data", {}).get("pod")