use anyhow::Result;
use serde::{Deserialize, Serialize};
use std::path::Path;

/// Main dashboard configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DashboardConfig {
    pub zmq: ZmqConfig,
    pub ui: UiConfig,
    pub hosts: HostsConfig,
    pub metrics: MetricsConfig,
    pub widgets: WidgetsConfig,
}

/// ZMQ consumer configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ZmqConfig {
    pub subscriber_ports: Vec<u16>,
    pub connection_timeout_ms: u64,
    pub reconnect_interval_ms: u64,
}

/// UI configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct UiConfig {
    pub refresh_rate_ms: u64,
    pub theme: String,
    pub preserve_layout: bool,
}

/// Hosts configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct HostsConfig {
    pub auto_discovery: bool,
    pub predefined_hosts: Vec<String>,
    pub default_host: Option<String>,
}

/// Metrics configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MetricsConfig {
    pub history_retention_hours: u64,
    pub max_metrics_per_host: usize,
}

/// Widget configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct WidgetsConfig {
    pub cpu: WidgetConfig,
    pub memory: WidgetConfig,
    pub storage: WidgetConfig,
    pub services: WidgetConfig,
    pub backup: WidgetConfig,
}

/// Individual widget configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct WidgetConfig {
    pub enabled: bool,
    pub metrics: Vec<String>,
}

impl DashboardConfig {
    pub fn load_from_file<P: AsRef<Path>>(path: P) -> Result<Self> {
        let path = path.as_ref();
        let content = std::fs::read_to_string(path)?;
        let config: DashboardConfig = toml::from_str(&content)?;
        Ok(config)
    }
}

impl Default for DashboardConfig {
    fn default() -> Self {
        Self {
            zmq: ZmqConfig::default(),
            ui: UiConfig::default(),
            hosts: HostsConfig::default(),
            metrics: MetricsConfig::default(),
            widgets: WidgetsConfig::default(),
        }
    }
}

impl Default for ZmqConfig {
    fn default() -> Self {
        Self {
            subscriber_ports: vec![6130],
            connection_timeout_ms: 15000,
            reconnect_interval_ms: 5000,
        }
    }
}

impl Default for UiConfig {
    fn default() -> Self {
        Self {
            refresh_rate_ms: 100,
            theme: "default".to_string(),
            preserve_layout: true,
        }
    }
}

impl Default for HostsConfig {
    fn default() -> Self {
        Self {
            auto_discovery: true,
            predefined_hosts: vec![
                "cmbox".to_string(),
                "labbox".to_string(),
                "simonbox".to_string(),
                "steambox".to_string(),
                "srv01".to_string(),
            ],
            default_host: Some("cmbox".to_string()),
        }
    }
}

impl Default for MetricsConfig {
    fn default() -> Self {
        Self {
            history_retention_hours: 24,
            max_metrics_per_host: 10000,
        }
    }
}

impl Default for WidgetsConfig {
    fn default() -> Self {
        Self {
            cpu: WidgetConfig {
                enabled: true,
                metrics: vec![
                    "cpu_load_1min".to_string(),
                    "cpu_load_5min".to_string(),
                    "cpu_load_15min".to_string(),
                    "cpu_temperature_celsius".to_string(),
                ],
            },
            memory: WidgetConfig {
                enabled: true,
                metrics: vec![
                    "memory_usage_percent".to_string(),
                    "memory_total_gb".to_string(),
                    "memory_available_gb".to_string(),
                ],
            },
            storage: WidgetConfig {
                enabled: true,
                metrics: vec![
                    "disk_nvme0_temperature_celsius".to_string(),
                    "disk_nvme0_wear_percent".to_string(),
                    "disk_nvme0_usage_percent".to_string(),
                ],
            },
            services: WidgetConfig {
                enabled: true,
                metrics: vec![
                    "service_ssh_status".to_string(),
                    "service_ssh_memory_mb".to_string(),
                ],
            },
            backup: WidgetConfig {
                enabled: true,
                metrics: vec![
                    "backup_status".to_string(),
                    "backup_last_run_timestamp".to_string(),
                ],
            },
        }
    }
}