use serde::{Deserialize, Serialize};
use std::collections::HashMap;

/// OSIRIS configuration
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct Config {
    /// HeroDB connection configuration
    pub herodb: HeroDbConfig,
    
    /// Namespace configurations
    #[serde(default)]
    pub namespaces: HashMap<String, NamespaceConfig>,
}

/// HeroDB connection configuration
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct HeroDbConfig {
    /// HeroDB URL (e.g., "redis://localhost:6379")
    pub url: String,
}

/// Namespace configuration
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct NamespaceConfig {
    /// HeroDB database ID for this namespace
    pub db_id: u16,
}

impl Config {
    /// Get namespace configuration by name
    pub fn get_namespace(&self, name: &str) -> Option<&NamespaceConfig> {
        self.namespaces.get(name)
    }
    
    /// Add or update a namespace
    pub fn set_namespace(&mut self, name: String, config: NamespaceConfig) {
        self.namespaces.insert(name, config);
    }
    
    /// Remove a namespace
    pub fn remove_namespace(&mut self, name: &str) -> Option<NamespaceConfig> {
        self.namespaces.remove(name)
    }
    
    /// Get the next available database ID
    pub fn next_db_id(&self) -> u16 {
        let max_id = self
            .namespaces
            .values()
            .map(|ns| ns.db_id)
            .max()
            .unwrap_or(0);
        max_id + 1
    }
}