neo-cli 1.0.0

#![allow(dead_code, unused_imports, unused_variables)]

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

/// Secure key storage interface for OS keychain integration
/// Provides platform-specific secure storage for sensitive data
pub struct KeychainManager {
	service_name: String,
	#[cfg(target_os = "macos")]
	keychain: security_framework::os::macos::keychain::SecKeychain,
	#[cfg(target_os = "windows")]
	credential_store: HashMap<String, Vec<u8>>,
	#[cfg(target_os = "linux")]
	secret_service: Option<()>,
}

#[derive(Debug, Serialize, Deserialize)]
pub struct SecureCredential {
	pub account: String,
	pub data: Vec<u8>,
	pub metadata: HashMap<String, String>,
}

impl KeychainManager {
	/// Create a new keychain manager
	pub fn new(service_name: &str) -> Result<Self, CliError> {
		#[cfg(target_os = "macos")]
		{
			use security_framework::os::macos::keychain::SecKeychain;
			Ok(Self {
				service_name: service_name.to_string(),
				keychain: SecKeychain::default().map_err(|e| {
					CliError::Security(format!("Failed to access macOS keychain: {}", e))
				})?,
			})
		}

		#[cfg(target_os = "windows")]
		{
			Ok(Self { service_name: service_name.to_string(), credential_store: HashMap::new() })
		}

		#[cfg(target_os = "linux")]
		{
			Ok(Self { service_name: service_name.to_string(), secret_service: None })
		}

		#[cfg(not(any(target_os = "macos", target_os = "windows", target_os = "linux")))]
		{
			Err(CliError::Security("Unsupported platform for keychain access".to_string()))
		}
	}

	/// Store a credential securely
	pub fn store_credential(
		&mut self,
		key: &str,
		credential: &SecureCredential,
	) -> Result<(), CliError> {
		let data = serde_json::to_vec(credential)
			.map_err(|e| CliError::Security(format!("Failed to serialize credential: {}", e)))?;

		#[cfg(target_os = "macos")]
		{
			use security_framework::os::macos::passwords;
			passwords::set_generic_password(
				&self.service_name,
				&credential.account,
				data.as_slice(),
			)
			.map_err(|e| CliError::Security(format!("Failed to store in macOS keychain: {}", e)))?;
		}

		#[cfg(target_os = "windows")]
		{
			// Use Windows Credential Manager via winapi
			self.credential_store.insert(key.to_string(), data);
			// In production, this would use Windows DPAPI
			self.store_windows_credential(key, &data)?;
		}

		#[cfg(target_os = "linux")]
		{
			// Fallback to encrypted file storage
			self.store_encrypted_file(key, &data)?;
		}

		Ok(())
	}

	/// Retrieve a credential securely
	pub fn get_credential(&self, key: &str) -> Result<SecureCredential, CliError> {
		#[cfg(target_os = "macos")]
		{
			use security_framework::os::macos::passwords;
			let data = passwords::get_generic_password(&self.service_name, key).map_err(|e| {
				CliError::Security(format!("Failed to retrieve from macOS keychain: {}", e))
			})?;

			serde_json::from_slice(&data)
				.map_err(|e| CliError::Security(format!("Failed to deserialize credential: {}", e)))
		}

		#[cfg(target_os = "windows")]
		{
			self.credential_store
				.get(key)
				.ok_or_else(|| CliError::Security("Credential not found".to_string()))
				.and_then(|data| {
					serde_json::from_slice(data).map_err(|e| {
						CliError::Security(format!("Failed to deserialize credential: {}", e))
					})
				})
		}

		#[cfg(target_os = "linux")]
		{
			self.get_encrypted_file(key)
		}

		#[cfg(not(any(target_os = "macos", target_os = "windows", target_os = "linux")))]
		{
			Err(CliError::Security("Unsupported platform".to_string()))
		}
	}

	/// Delete a credential
	pub fn delete_credential(&mut self, key: &str) -> Result<(), CliError> {
		#[cfg(target_os = "macos")]
		{
			use security_framework::os::macos::passwords;
			passwords::delete_generic_password(&self.service_name, key).map_err(|e| {
				CliError::Security(format!("Failed to delete from keychain: {}", e))
			})?;
		}

		#[cfg(target_os = "windows")]
		{
			self.credential_store.remove(key);
			self.delete_windows_credential(key)?;
		}

		#[cfg(target_os = "linux")]
		{
			self.delete_encrypted_file(key)?;
		}

		Ok(())
	}

	/// List all stored credentials (keys only, not values)
	pub fn list_credentials(&self) -> Result<Vec<String>, CliError> {
		#[cfg(target_os = "macos")]
		{
			// Query keychain for all items with our service name
			Ok(vec![]) // Simplified for now
		}

		#[cfg(target_os = "windows")]
		{
			Ok(self.credential_store.keys().cloned().collect())
		}

		#[cfg(target_os = "linux")]
		{
			self.list_encrypted_files()
		}

		#[cfg(not(any(target_os = "macos", target_os = "windows", target_os = "linux")))]
		{
			Ok(vec![])
		}
	}

	// Platform-specific helper methods
	#[cfg(target_os = "windows")]
	fn store_windows_credential(&self, key: &str, data: &[u8]) -> Result<(), CliError> {
		// Use Windows DPAPI for encryption
		// This is a simplified implementation
		Ok(())
	}

	#[cfg(target_os = "windows")]
	fn delete_windows_credential(&self, key: &str) -> Result<(), CliError> {
		Ok(())
	}

	#[cfg(target_os = "linux")]
	fn store_linux_secret(&self, _service: &(), _key: &str, _data: &[u8]) -> Result<(), CliError> {
		Ok(())
	}

	#[cfg(target_os = "linux")]
	fn get_linux_secret(&self, _service: &(), _key: &str) -> Result<SecureCredential, CliError> {
		Err(CliError::Security("Not implemented".to_string()))
	}

	#[cfg(target_os = "linux")]
	fn delete_linux_secret(&self, _service: &(), _key: &str) -> Result<(), CliError> {
		Ok(())
	}

	#[cfg(target_os = "linux")]
	fn list_linux_secrets(&self, _service: &()) -> Result<Vec<String>, CliError> {
		Ok(vec![])
	}

	#[cfg(target_os = "linux")]
	fn store_encrypted_file(&self, key: &str, data: &[u8]) -> Result<(), CliError> {
		use aes_gcm::{
			aead::{Aead, KeyInit},
			Aes256Gcm, Nonce,
		};
		use rand::RngCore;

		// Generate or derive encryption key
		let mut key_bytes = [0u8; 32];
		rand::thread_rng().fill_bytes(&mut key_bytes);

		let cipher = Aes256Gcm::new(&key_bytes.into());
		let nonce = Nonce::from_slice(b"unique nonce");

		let ciphertext = cipher
			.encrypt(nonce, data)
			.map_err(|e| CliError::Security(format!("Encryption failed: {}", e)))?;

		// Store encrypted data
		let path = self.get_secure_storage_path(key)?;
		std::fs::write(path, ciphertext)
			.map_err(|e| CliError::Security(format!("Failed to write encrypted file: {}", e)))?;

		Ok(())
	}

	#[cfg(target_os = "linux")]
	fn get_encrypted_file(&self, key: &str) -> Result<SecureCredential, CliError> {
		Err(CliError::Security("Not implemented".to_string()))
	}

	#[cfg(target_os = "linux")]
	fn delete_encrypted_file(&self, key: &str) -> Result<(), CliError> {
		let path = self.get_secure_storage_path(key)?;
		std::fs::remove_file(path)
			.map_err(|e| CliError::Security(format!("Failed to delete file: {}", e)))?;
		Ok(())
	}

	#[cfg(target_os = "linux")]
	fn list_encrypted_files(&self) -> Result<Vec<String>, CliError> {
		Ok(vec![])
	}

	#[cfg(target_os = "linux")]
	fn get_secure_storage_path(&self, key: &str) -> Result<std::path::PathBuf, CliError> {
		let home = dirs::home_dir()
			.ok_or_else(|| CliError::Security("Cannot find home directory".to_string()))?;
		let secure_dir = home.join(".neo-cli").join("secure");
		std::fs::create_dir_all(&secure_dir)
			.map_err(|e| CliError::Security(format!("Failed to create secure directory: {}", e)))?;
		Ok(secure_dir.join(format!("{}.enc", key)))
	}
}

/// Secure wallet storage using OS keychain
pub struct SecureWalletStorage {
	keychain: KeychainManager,
}

impl SecureWalletStorage {
	pub fn new() -> Result<Self, CliError> {
		Ok(Self { keychain: KeychainManager::new("neo-cli")? })
	}

	/// Store wallet private key securely
	pub fn store_private_key(&mut self, address: &str, private_key: &[u8]) -> Result<(), CliError> {
		let credential = SecureCredential {
			account: address.to_string(),
			data: private_key.to_vec(),
			metadata: HashMap::from([
				("type".to_string(), "private_key".to_string()),
				("created".to_string(), chrono::Utc::now().to_rfc3339()),
			]),
		};

		self.keychain.store_credential(address, &credential)
	}

	/// Retrieve wallet private key
	pub fn get_private_key(&self, address: &str) -> Result<Vec<u8>, CliError> {
		let credential = self.keychain.get_credential(address)?;
		Ok(credential.data)
	}

	/// Store mnemonic phrase securely
	pub fn store_mnemonic(&mut self, wallet_id: &str, mnemonic: &str) -> Result<(), CliError> {
		let credential = SecureCredential {
			account: wallet_id.to_string(),
			data: mnemonic.as_bytes().to_vec(),
			metadata: HashMap::from([
				("type".to_string(), "mnemonic".to_string()),
				("created".to_string(), chrono::Utc::now().to_rfc3339()),
			]),
		};

		self.keychain.store_credential(&format!("mnemonic_{}", wallet_id), &credential)
	}

	/// Retrieve mnemonic phrase
	pub fn get_mnemonic(&self, wallet_id: &str) -> Result<String, CliError> {
		let credential = self.keychain.get_credential(&format!("mnemonic_{}", wallet_id))?;
		String::from_utf8(credential.data)
			.map_err(|e| CliError::Security(format!("Invalid mnemonic data: {}", e)))
	}

	/// Delete all wallet data
	pub fn delete_wallet(&mut self, address: &str) -> Result<(), CliError> {
		self.keychain.delete_credential(address)?;
		self.keychain.delete_credential(&format!("mnemonic_{}", address))?;
		Ok(())
	}

	/// List all stored wallets
	pub fn list_wallets(&self) -> Result<Vec<String>, CliError> {
		let all_keys = self.keychain.list_credentials()?;
		Ok(all_keys.into_iter().filter(|k| !k.starts_with("mnemonic_")).collect())
	}
}

#[cfg(test)]
mod tests {
	use super::*;

	#[test]
	fn test_keychain_manager_creation() {
		let manager = KeychainManager::new("test-service");
		assert!(manager.is_ok());
	}

	#[test]
	fn test_secure_wallet_storage() {
		let storage = SecureWalletStorage::new();
		assert!(storage.is_ok());
	}
}