mod main_gemini25pro;
use std::process::Command;

pub trait Capability {}

pub trait CommandCapability: Capability {
    fn execute_command(&self, command: &str, args: &[&str]) -> Result<String, String>;
}

pub trait KubernetesCapability: Capability {
    fn apply_manifest(&self, manifest: &str) -> Result<(), String>;
    fn get_resource(&self, resource_type: &str, name: &str) -> Result<String, String>;
}

pub trait Topology {
    fn name(&self) -> &str;
}

pub trait Score<T: Topology> {
    fn compile(&self) -> Result<Box<dyn Interpret<T>>, String>;
    fn name(&self) -> &str;
}

pub struct LinuxHostTopology {
    name: String,
    host: String,
}

impl Capability for LinuxHostTopology {}

impl LinuxHostTopology {
    pub fn new(name: String, host: String) -> Self {
        Self { name, host }
    }
}

impl Topology for LinuxHostTopology {
    fn name(&self) -> &str {
        &self.name
    }
}

impl CommandCapability for LinuxHostTopology {
    fn execute_command(&self, command: &str, args: &[&str]) -> Result<String, String> {
        println!("Executing on {}: {} {:?}", self.host, command, args);
        // In a real implementation, this would SSH to the host and execute the command
        let output = Command::new(command)
            .args(args)
            .output()
            .map_err(|e| e.to_string())?;

        if output.status.success() {
            Ok(String::from_utf8_lossy(&output.stdout).to_string())
        } else {
            Err(String::from_utf8_lossy(&output.stderr).to_string())
        }
    }
}

pub struct K3DTopology {
    name: String,
    linux_host: LinuxHostTopology,
    cluster_name: String,
}

impl Capability for K3DTopology {}

impl K3DTopology {
    pub fn new(name: String, linux_host: LinuxHostTopology, cluster_name: String) -> Self {
        Self {
            name,
            linux_host,
            cluster_name,
        }
    }
}

impl Topology for K3DTopology {
    fn name(&self) -> &str {
        &self.name
    }
}

impl CommandCapability for K3DTopology {
    fn execute_command(&self, command: &str, args: &[&str]) -> Result<String, String> {
        self.linux_host.execute_command(command, args)
    }
}

impl KubernetesCapability for K3DTopology {
    fn apply_manifest(&self, manifest: &str) -> Result<(), String> {
        println!("Applying manifest to K3D cluster '{}'", self.cluster_name);
        // Write manifest to a temporary file
        let temp_file = format!("/tmp/manifest-harmony-temp.yaml");

        // Use the linux_host directly to avoid capability trait bounds
        self.linux_host
            .execute_command("bash", &["-c", &format!("cat > {}", temp_file)])?;

        // Apply with kubectl
        self.linux_host.execute_command("kubectl", &[
            "--context",
            &format!("k3d-{}", self.cluster_name),
            "apply",
            "-f",
            &temp_file,
        ])?;

        Ok(())
    }

    fn get_resource(&self, resource_type: &str, name: &str) -> Result<String, String> {
        println!(
            "Getting resource {}/{} from K3D cluster '{}'",
            resource_type, name, self.cluster_name
        );
        self.linux_host.execute_command("kubectl", &[
            "--context",
            &format!("k3d-{}", self.cluster_name),
            "get",
            resource_type,
            name,
            "-o",
            "yaml",
        ])
    }
}

pub struct CommandScore {
    name: String,
    command: String,
    args: Vec<String>,
}

impl CommandScore {
    pub fn new(name: String, command: String, args: Vec<String>) -> Self {
        Self {
            name,
            command,
            args,
        }
    }
}

pub trait Interpret<T: Topology> {
    fn execute(&self, topology: &T) -> Result<String, String>;
}

struct CommandInterpret;

impl<T> Interpret<T> for CommandInterpret
where
    T: Topology + CommandCapability,
{
    fn execute(&self, topology: &T) -> Result<String, String> {
        todo!()
    }
}

impl<T> Score<T> for CommandScore
where
    T: Topology + CommandCapability,
{
    fn compile(&self) -> Result<Box<dyn Interpret<T>>, String> {
        Ok(Box::new(CommandInterpret {}))
    }

    fn name(&self) -> &str {
        &self.name
    }
}


#[derive(Clone)]
pub struct K8sResourceScore {
    name: String,
    manifest: String,
}

impl K8sResourceScore {
    pub fn new(name: String, manifest: String) -> Self {
        Self { name, manifest }
    }
}

struct K8sResourceInterpret {
    score: K8sResourceScore,
}

impl<T: Topology + KubernetesCapability> Interpret<T> for K8sResourceInterpret {
    fn execute(&self, topology: &T) -> Result<String, String> {
        todo!()
    }
}

impl<T> Score<T> for K8sResourceScore
where
    T: Topology + KubernetesCapability,
{
    fn compile(&self) -> Result<Box<(dyn Interpret<T> + 'static)>, String> {
        Ok(Box::new(K8sResourceInterpret {
            score: self.clone(),
        }))
    }

    fn name(&self) -> &str {
        &self.name
    }
}

pub struct Maestro<T: Topology> {
    topology: T,
    scores: Vec<Box<dyn Score<T>>>,
}


impl<T: Topology> Maestro<T> {
    pub fn new(topology: T) -> Self {
        Self {
            topology,
            scores: Vec::new(),
        }
    }

    pub fn register_score<S>(&mut self, score: S)
    where
        S: Score<T> + 'static,
    {
        println!(
            "Registering score '{}' for topology '{}'",
            score.name(),
            self.topology.name()
        );
        self.scores.push(Box::new(score));
    }

    pub fn orchestrate(&self) -> Result<(), String> {
        println!("Orchestrating topology '{}'", self.topology.name());
        for score in &self.scores {
            let interpret = score.compile()?;
            interpret.execute(&self.topology)?;
        }
        Ok(())
    }
}

fn main() {
    let linux_host = LinuxHostTopology::new("dev-machine".to_string(), "localhost".to_string());

    let mut linux_maestro = Maestro::new(linux_host);

    linux_maestro.register_score(CommandScore::new(
        "check-disk".to_string(),
        "df".to_string(),
        vec!["-h".to_string()],
    ));
    linux_maestro.orchestrate().unwrap();

    // This would fail to compile if we tried to register a K8sResourceScore
    // because LinuxHostTopology doesn't implement KubernetesCapability
    //linux_maestro.register_score(K8sResourceScore::new(
    //    "...".to_string(),
    //    "...".to_string(),
    //));

    // Create a K3D topology which has both Command and Kubernetes capabilities
    let k3d_host = LinuxHostTopology::new("k3d-host".to_string(), "localhost".to_string());

    let k3d_topology = K3DTopology::new(
        "dev-cluster".to_string(),
        k3d_host,
        "devcluster".to_string(),
    );

    // Create a maestro for the K3D topology
    let mut k3d_maestro = Maestro::new(k3d_topology);

    // We can register both command scores and kubernetes scores
    k3d_maestro.register_score(CommandScore::new(
        "check-nodes".to_string(),
        "kubectl".to_string(),
        vec!["get".to_string(), "nodes".to_string()],
    ));

    k3d_maestro.register_score(K8sResourceScore::new(
        "deploy-nginx".to_string(),
        r#"
        apiVersion: apps/v1
        kind: Deployment
        metadata:
          name: nginx
        spec:
          replicas: 1
          selector:
            matchLabels:
              app: nginx
          template:
            metadata:
              labels:
                app: nginx
            spec:
              containers:
              - name: nginx
                image: nginx:latest
                ports:
                - containerPort: 80
        "#
        .to_string(),
    ));

    // Orchestrate both topologies
    linux_maestro.orchestrate().unwrap();
    k3d_maestro.orchestrate().unwrap();
}