geometric-langlands-cli 0.2.0

use anyhow::Result;
use serde::{Deserialize, Serialize};
use std::path::Path;
use uuid::Uuid;
use chrono::{DateTime, Utc};
use crate::commands::compute::ComputationResult;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct StoredComputation {
    pub id: String,
    pub computation_type: String,
    pub timestamp: DateTime<Utc>,
    pub result: String, // JSON serialized ComputationResult
    pub metadata: Option<serde_json::Value>,
}

pub struct Database {
    _db_path: std::path::PathBuf,
}

impl Database {
    pub async fn new(db_path: &Path) -> Result<Self> {
        // For now, we'll use a simple file-based persistence
        // In a real implementation, this would initialize SQLite
        if let Some(parent) = db_path.parent() {
            std::fs::create_dir_all(parent)?;
        }
        
        Ok(Self {
            _db_path: db_path.to_path_buf(),
        })
    }
    
    pub async fn init(&self) -> Result<()> {
        // Initialize database schema
        // For now, this is a no-op
        Ok(())
    }
    
    pub async fn migrate(&self) -> Result<()> {
        // Run database migrations
        // For now, this is a no-op
        Ok(())
    }
    
    pub async fn store_computation(
        &self,
        computation_type: &str,
        result: &ComputationResult,
    ) -> Result<String> {
        let id = Uuid::new_v4().to_string();
        let timestamp = Utc::now();
        let result_json = serde_json::to_string(result)?;
        
        let computation = StoredComputation {
            id: id.clone(),
            computation_type: computation_type.to_string(),
            timestamp,
            result: result_json,
            metadata: None,
        };
        
        // In a real implementation, this would insert into SQLite
        // For now, we'll just log it
        println!("Stored computation {} of type {}", id, computation_type);
        
        Ok(id)
    }
    
    pub async fn list_computations(&self, limit: u32) -> Result<Vec<StoredComputation>> {
        // In a real implementation, this would query SQLite
        // For now, return empty list
        Ok(vec![])
    }
    
    pub async fn get_computation(&self, id: &str) -> Result<Option<StoredComputation>> {
        // In a real implementation, this would query SQLite by ID
        // For now, return None
        Ok(None)
    }
    
    pub async fn delete_computation(&self, id: &str) -> Result<()> {
        // In a real implementation, this would delete from SQLite
        println!("Deleted computation {}", id);
        Ok(())
    }
    
    pub async fn export(&self, path: &Path) -> Result<()> {
        // Export database to file
        std::fs::write(path, "# Database export placeholder\n")?;
        Ok(())
    }
    
    pub async fn import(&self, path: &Path) -> Result<()> {
        // Import database from file
        let _content = std::fs::read_to_string(path)?;
        println!("Imported database from {}", path.display());
        Ok(())
    }
}