import Foundation
import Logging

private let logger = Logger(label: "com.buckia.BunnyStorageProvider")

/// Implementation of StorageProvider for Bunny.net storage
public class BunnyStorageProvider: StorageProvider {
    /// Provider type identifier
    public let providerType: StorageProviderType = .bunny
    
    /// Storage zone name
    private let storageZoneName: String
    
    /// API key for authentication
    private let apiKey: String
    
    /// HTTP client for API requests (placeholder - would use URLSession in a real implementation)
    private let httpClient = HTTPClient()
    
    /// Base URL for API requests
    private let baseURL: URL
    
    /// Creates a Bunny storage provider with the specified configuration
    public init(config: BuckiaConfiguration) throws {
        guard config.provider == .bunny else {
            throw BuckiaError.configurationError("Invalid provider type for BunnyStorageProvider")
        }
        
        self.storageZoneName = config.bucketName
        
        guard let apiKey = config.authConfig.credentials?["api_key"] else {
            throw BuckiaError.configurationError("Missing API key for Bunny storage provider")
        }
        self.apiKey = apiKey
        
        // Bunny.net storage API base URL
        self.baseURL = URL(string: "https://storage.bunnycdn.com/\(storageZoneName)")!
    }
    
    /// Connect to the storage provider
    public func connect() async throws -> Bool {
        // Set the AccessKey header for all requests
        httpClient.defaultHeaders = [
            "AccessKey": apiKey,
            "Content-Type": "application/json"
        ]
        
        let status = try await testConnection()
        return status.isConnected
    }
    
    /// Test connection to the provider
    public func testConnection() async throws -> ConnectionStatus {
        // In a real implementation, make a simple API call to verify connection
        return ConnectionStatus(isConnected: true)
    }
    
    /// Sync files between local and remote storage
    public func sync(options: SyncOptions, progressHandler: SyncProgressHandler?) async throws -> SyncResult {
        // Placeholder implementation
        return SyncResult()
    }
    
    /// Upload a file to remote storage
    public func uploadFile(localURL: URL, remotePath: String?) async throws -> UploadResult {
        // Placeholder implementation
        return UploadResult(success: true)
    }
    
    /// Download a file from remote storage
    public func downloadFile(remotePath: String, localURL: URL) async throws -> DownloadResult {
        // Placeholder implementation
        return DownloadResult(success: true)
    }
    
    /// Delete a file from remote storage
    public func deleteFile(remotePath: String) async throws -> Bool {
        // Placeholder implementation
        return true
    }
    
    /// List files in remote storage
    public func listFiles(path: String?) async throws -> [RemoteFile] {
        // Placeholder implementation
        return []
    }
    
    /// Get a public URL for a file
    public func getPublicURL(remotePath: String) throws -> URL {
        // Placeholder implementation
        return baseURL.appendingPathComponent(remotePath)
    }
    
    /// Generate tokens for access control
    public func generateAccessToken(options: AccessTokenOptions) throws -> String? {
        // Create a BunnyTokenFactory to generate the token
        let factory = BunnyTokenFactory(storageZoneName: storageZoneName, securityKey: apiKey)
        return try factory.generateToken(options: options)
    }
}

/// Simple HTTP client placeholder
class HTTPClient {
    /// Default headers for all requests
    var defaultHeaders: [String: String] = [:]
}