use super::client::KubeClient;
use super::types::{NodeCondition, NodeDetails, NodeResources, NodeStatus};
use k8s_openapi::api::core::v1::{Node, Pod};
use kube::{api::ListParams, Api};

impl KubeClient {
    /// Gets list of all nodes and their statuses
    pub async fn get_nodes(&self) -> Result<Vec<NodeStatus>, Box<dyn std::error::Error>> {
        let nodes: Api<Node> = Api::all(self.inner().clone());
        let node_list = nodes.list(&ListParams::default()).await?;

        let mut result = Vec::new();

        for node in node_list.items {
            let name = node
                .metadata
                .name
                .clone()
                .unwrap_or_else(|| "unknown".to_string());

            let ready = node
                .status
                .as_ref()
                .and_then(|s| s.conditions.as_ref())
                .and_then(|conditions| {
                    conditions
                        .iter()
                        .find(|c| c.type_ == "Ready")
                        .map(|c| c.status == "True")
                })
                .unwrap_or(false);

            let version = node
                .status
                .as_ref()
                .and_then(|s| s.node_info.as_ref())
                .map(|info| info.kubelet_version.clone())
                .unwrap_or_else(|| "unknown".to_string());

            let internal_ip = node
                .status
                .as_ref()
                .and_then(|s| s.addresses.as_ref())
                .and_then(|addresses| {
                    addresses
                        .iter()
                        .find(|a| a.type_ == "InternalIP")
                        .map(|a| a.address.clone())
                });

            result.push(NodeStatus {
                name,
                ready,
                version,
                internal_ip,
            });
        }

        Ok(result)
    }

    /// Gets detailed information about a specific node for diagnostics
    pub async fn get_node_details(
        &self,
        node_name: &str,
    ) -> Result<NodeDetails, Box<dyn std::error::Error>> {
        let nodes: Api<Node> = Api::all(self.inner().clone());
        let node = nodes.get(node_name).await?;

        // Conditions
        let conditions = node
            .status
            .as_ref()
            .and_then(|s| s.conditions.as_ref())
            .map(|conds| {
                conds
                    .iter()
                    .map(|c| NodeCondition {
                        type_: c.type_.clone(),
                        status: c.status.clone(),
                        reason: c.reason.clone(),
                        message: c.message.clone(),
                    })
                    .collect()
            })
            .unwrap_or_default();

        // Resources - capacity
        let capacity = node
            .status
            .as_ref()
            .and_then(|s| s.capacity.as_ref())
            .map(|c| NodeResources {
                cpu: c.get("cpu").map(|q| q.0.clone()).unwrap_or_default(),
                memory: c.get("memory").map(|q| q.0.clone()).unwrap_or_default(),
                pods: c.get("pods").map(|q| q.0.clone()).unwrap_or_default(),
            })
            .unwrap_or(NodeResources {
                cpu: "unknown".to_string(),
                memory: "unknown".to_string(),
                pods: "unknown".to_string(),
            });

        // Resources - allocatable
        let allocatable = node
            .status
            .as_ref()
            .and_then(|s| s.allocatable.as_ref())
            .map(|a| NodeResources {
                cpu: a.get("cpu").map(|q| q.0.clone()).unwrap_or_default(),
                memory: a.get("memory").map(|q| q.0.clone()).unwrap_or_default(),
                pods: a.get("pods").map(|q| q.0.clone()).unwrap_or_default(),
            })
            .unwrap_or(NodeResources {
                cpu: "unknown".to_string(),
                memory: "unknown".to_string(),
                pods: "unknown".to_string(),
            });

        // Taints
        let taints = node
            .spec
            .as_ref()
            .and_then(|s| s.taints.as_ref())
            .map(|t| {
                t.iter()
                    .map(|taint| {
                        format!(
                            "{}={} (effect: {})",
                            taint.key,
                            taint.value.as_deref().unwrap_or(""),
                            taint.effect
                        )
                    })
                    .collect()
            })
            .unwrap_or_default();

        // Labels
        let labels = node
            .metadata
            .labels
            .clone()
            .unwrap_or_default()
            .into_iter()
            .collect::<Vec<_>>();

        // Count pods on the node
        let pods: Api<Pod> = Api::all(self.inner().clone());
        let pod_list = pods.list(&ListParams::default()).await?;
        let pod_count = pod_list
            .items
            .iter()
            .filter(|pod| {
                pod.spec
                    .as_ref()
                    .and_then(|s| s.node_name.as_ref())
                    .map(|n| n == node_name)
                    .unwrap_or(false)
            })
            .count();

        let version = node
            .status
            .as_ref()
            .and_then(|s| s.node_info.as_ref())
            .map(|info| info.kubelet_version.clone())
            .unwrap_or_else(|| "unknown".to_string());

        Ok(NodeDetails {
            name: node_name.to_string(),
            conditions,
            capacity,
            allocatable,
            taints,
            labels,
            pod_count,
            version,
        })
    }
}