use crate::error::Error;
use crate::proxmox::{
    AddDiskConfig, AddNICConfig, ApiResponse, Backup, BackupJob, BackupJobConfig, ClusterStatus,
    CreateSnapshotConfig, Disk, EditNICConfig, NetworkInterface, Node, RestoreConfig, Snapshot,
    Storage, StorageContent, StorageDetail, Task, VM,
};
use crate::{CertificateInfo, ConnectionConfig, TermProxyResponse, VNCProxyResponse};
use reqwest::header::{HeaderMap, HeaderValue, AUTHORIZATION};
use reqwest::Client;
use std::collections::HashMap;
use std::sync::Arc;
use tokio::sync::RwLock;

struct Connection {
    config: ConnectionConfig,
    client: Client,
    current_endpoint_index: usize,
}

pub struct ConnectionManager {
    connections: HashMap<String, Connection>,
}

impl ConnectionManager {
    pub fn new() -> Self {
        Self {
            connections: HashMap::new(),
        }
    }

    pub async fn add_connection(&self, config: ConnectionConfig) -> crate::Result<()> {
        // In a real implementation, we'd store this to disk
        // For now, just validate the config
        if config.primary.url.is_empty() {
            return Err(Error::InvalidUrl("URL cannot be empty".to_string()));
        }
        Ok(())
    }

    pub async fn remove_connection(&self, id: &str) -> crate::Result<()> {
        // Remove from storage
        Ok(())
    }

    pub async fn connect(&self, id: &str) -> crate::Result<()> {
        // Connect to the server
        Ok(())
    }

    pub async fn disconnect(&self, id: &str) -> crate::Result<()> {
        // Disconnect from the server
        Ok(())
    }

    pub async fn get_certificate_info(&self, url: &str) -> crate::Result<CertificateInfo> {
        // Fetch certificate info from the server
        Ok(CertificateInfo {
            fingerprint: "AB:CD:EF:12:34:56:78:90".to_string(),
            issuer: "Proxmox".to_string(),
            subject: "pve".to_string(),
            valid_from: "2024-01-01".to_string(),
            valid_to: "2034-01-01".to_string(),
            self_signed: true,
        })
    }

    pub async fn trust_certificate(&self, id: &str, fingerprint: &str) -> crate::Result<()> {
        // Store trusted certificate
        Ok(())
    }

    pub async fn get_nodes(&self, connection_id: &str) -> crate::Result<Vec<Node>> {
        // Fetch nodes from Proxmox API
        Ok(vec![])
    }

    pub async fn get_vms(&self, connection_id: &str) -> crate::Result<Vec<VM>> {
        // Fetch VMs from Proxmox API
        Ok(vec![])
    }

    pub async fn get_storage(&self, connection_id: &str) -> crate::Result<Vec<Storage>> {
        // Fetch storage from Proxmox API
        Ok(vec![])
    }

    pub async fn get_storage_content(
        &self,
        _connection_id: &str,
        _storage: &str,
    ) -> crate::Result<Vec<StorageContent>> {
        // Fetch content of a storage pool via Proxmox API
        Ok(vec![])
    }

    pub async fn get_storage_detail(
        &self,
        _connection_id: &str,
        _node: &str,
        _storage: &str,
    ) -> crate::Result<StorageDetail> {
        // Fetch detailed info about a storage pool via Proxmox API
        Ok(StorageDetail {
            storage: String::new(),
            r#type: String::new(),
            content: String::new(),
            active: 0,
            enabled: 0,
            shared: 0,
            used: 0,
            total: 0,
            avail: 0,
            node: String::new(),
        })
    }

    pub async fn get_tasks(&self, connection_id: &str) -> crate::Result<Vec<Task>> {
        // Fetch tasks from Proxmox API
        Ok(vec![])
    }

    pub async fn get_cluster_status(&self, connection_id: &str) -> crate::Result<ClusterStatus> {
        // Fetch cluster status from Proxmox API
        Ok(ClusterStatus {
            r#type: "cluster".to_string(),
            name: "default".to_string(),
            id: "cluster/default".to_string(),
            nodes: None,
        })
    }

    pub async fn start_vm(&self, connection_id: &str, node: &str, vmid: u32) -> crate::Result<()> {
        // Start VM via Proxmox API
        Ok(())
    }

    pub async fn stop_vm(&self, connection_id: &str, node: &str, vmid: u32) -> crate::Result<()> {
        // Stop VM via Proxmox API
        Ok(())
    }

    pub async fn shutdown_vm(&self, connection_id: &str, node: &str, vmid: u32) -> crate::Result<()> {
        // Shutdown VM via Proxmox API
        Ok(())
    }

    pub async fn reboot_vm(&self, connection_id: &str, node: &str, vmid: u32) -> crate::Result<()> {
        // Reboot VM via Proxmox API
        Ok(())
    }

    pub async fn suspend_vm(&self, connection_id: &str, node: &str, vmid: u32) -> crate::Result<()> {
        // Suspend (pause) VM via Proxmox API
        Ok(())
    }

    pub async fn resume_vm(&self, connection_id: &str, node: &str, vmid: u32) -> crate::Result<()> {
        // Resume suspended VM via Proxmox API
        Ok(())
    }

    pub async fn get_disks(
        &self,
        connection_id: &str,
        node: &str,
        vmid: u32,
    ) -> crate::Result<Vec<Disk>> {
        // Fetch disks for a VM via Proxmox API
        Ok(vec![])
    }

    pub async fn add_disk(
        &self,
        connection_id: &str,
        node: &str,
        vmid: u32,
        _config: AddDiskConfig,
    ) -> crate::Result<()> {
        // Add a disk to a VM via Proxmox API
        Ok(())
    }

    pub async fn resize_disk(
        &self,
        connection_id: &str,
        node: &str,
        vmid: u32,
        _disk: &str,
        _size: u64,
    ) -> crate::Result<()> {
        // Resize a disk via Proxmox API
        Ok(())
    }

    pub async fn remove_disk(
        &self,
        connection_id: &str,
        node: &str,
        vmid: u32,
        _disk: &str,
    ) -> crate::Result<()> {
        // Remove a disk via Proxmox API
        Ok(())
    }

    pub async fn move_disk(
        &self,
        connection_id: &str,
        node: &str,
        vmid: u32,
        _disk: &str,
        _storage: &str,
    ) -> crate::Result<()> {
        // Move a disk to different storage via Proxmox API
        Ok(())
    }

    pub async fn get_network_interfaces(
        &self,
        connection_id: &str,
        node: &str,
        vmid: u32,
    ) -> crate::Result<Vec<NetworkInterface>> {
        // Fetch network interfaces for a VM via Proxmox API
        Ok(vec![])
    }

    pub async fn add_nic(
        &self,
        connection_id: &str,
        node: &str,
        vmid: u32,
        _config: AddNICConfig,
    ) -> crate::Result<()> {
        // Add a network interface to a VM via Proxmox API
        Ok(())
    }

    pub async fn edit_nic(
        &self,
        connection_id: &str,
        node: &str,
        vmid: u32,
        _nic: &str,
        _config: EditNICConfig,
    ) -> crate::Result<()> {
        // Edit a network interface on a VM via Proxmox API
        Ok(())
    }

    pub async fn remove_nic(
        &self,
        connection_id: &str,
        node: &str,
        vmid: u32,
        _nic: &str,
    ) -> crate::Result<()> {
        // Remove a network interface from a VM via Proxmox API
        Ok(())
    }

    pub async fn get_snapshots(
        &self,
        _connection_id: &str,
        _node: &str,
        _vmid: u32,
    ) -> crate::Result<Vec<Snapshot>> {
        // Fetch snapshots for a VM via Proxmox API
        Ok(vec![])
    }

    pub async fn create_snapshot(
        &self,
        _connection_id: &str,
        _node: &str,
        _vmid: u32,
        _config: CreateSnapshotConfig,
    ) -> crate::Result<()> {
        // Create a snapshot for a VM via Proxmox API
        Ok(())
    }

    pub async fn delete_snapshot(
        &self,
        _connection_id: &str,
        _node: &str,
        _vmid: u32,
        _name: &str,
    ) -> crate::Result<()> {
        // Delete a snapshot from a VM via Proxmox API
        Ok(())
    }

    pub async fn rollback_snapshot(
        &self,
        _connection_id: &str,
        _node: &str,
        _vmid: u32,
        _name: &str,
    ) -> crate::Result<()> {
        // Rollback a VM to a snapshot via Proxmox API
        Ok(())
    }

    pub async fn migrate_vm(
        &self,
        _connection_id: &str,
        _node: &str,
        _vmid: u32,
        _target_node: &str,
        _online: bool,
    ) -> crate::Result<()> {
        // Migrate a VM to another node via Proxmox API
        Ok(())
    }

    pub async fn create_vnc_proxy(
        &self,
        _connection_id: &str,
        _node: &str,
        _vmid: u32,
    ) -> crate::Result<VNCProxyResponse> {
        // Create a VNC proxy via Proxmox API
        // POST /nodes/{node}/qemu/{vmid}/vncproxy
        // Returns ticket, port, and certificate
        Ok(VNCProxyResponse {
            ticket: String::new(),
            port: 0,
            cert: String::new(),
        })
    }

    pub async fn create_term_proxy(
        &self,
        _connection_id: &str,
        _node: &str,
        _vmid: u32,
    ) -> crate::Result<TermProxyResponse> {
        // Create a terminal proxy via Proxmox API
        // POST /nodes/{node}/lxc/{vmid}/termproxy
        // Returns ticket and port
        Ok(TermProxyResponse {
            ticket: String::new(),
            port: 0,
        })
    }

    pub async fn get_websocket_url(
        &self,
        _connection_id: &str,
        _node: &str,
    ) -> crate::Result<String> {
        // Build the WebSocket base URL from the connection config
        // Returns wss://{host}:{port} for the given connection
        Ok(String::new())
    }

    pub async fn get_backup_jobs(
        &self,
        _connection_id: &str,
    ) -> crate::Result<Vec<BackupJob>> {
        // Fetch backup jobs from Proxmox API
        Ok(vec![])
    }

    pub async fn get_backups(
        &self,
        _connection_id: &str,
        _storage: Option<&str>,
    ) -> crate::Result<Vec<Backup>> {
        // Fetch existing backups from Proxmox API
        Ok(vec![])
    }

    pub async fn create_backup_job(
        &self,
        _connection_id: &str,
        _config: BackupJobConfig,
    ) -> crate::Result<()> {
        // Create a backup job via Proxmox API
        Ok(())
    }

    pub async fn update_backup_job(
        &self,
        _connection_id: &str,
        _id: &str,
        _config: BackupJobConfig,
    ) -> crate::Result<()> {
        // Update a backup job via Proxmox API
        Ok(())
    }

    pub async fn delete_backup_job(
        &self,
        _connection_id: &str,
        _id: &str,
    ) -> crate::Result<()> {
        // Delete a backup job via Proxmox API
        Ok(())
    }

    pub async fn run_backup(
        &self,
        _connection_id: &str,
        _config: BackupJobConfig,
    ) -> crate::Result<()> {
        // Trigger an immediate backup run via Proxmox API
        Ok(())
    }

    pub async fn restore_backup(
        &self,
        _connection_id: &str,
        _volid: &str,
        _config: RestoreConfig,
    ) -> crate::Result<()> {
        // Restore a backup via Proxmox API
        Ok(())
    }

    pub async fn delete_backup(
        &self,
        _connection_id: &str,
        _volid: &str,
    ) -> crate::Result<()> {
        // Delete a backup file via Proxmox API
        Ok(())
    }
}