package storage

import "time"

// Config defines the storage configuration for a Tutus node.
type Config struct {
	// Provider specifies the active storage backend
	Provider string `yaml:"provider"`

	// NeoFS configuration (when Provider = "neofs")
	NeoFS NeoFSConfig `yaml:"neofs"`

	// Local configuration (when Provider = "local")
	Local LocalConfig `yaml:"local"`

	// S3 configuration (when Provider = "s3")
	S3 S3Config `yaml:"s3"`
}

// NeoFSConfig configures the NeoFS storage adapter.
type NeoFSConfig struct {
	// Endpoints is a list of NeoFS node addresses
	Endpoints []string `yaml:"endpoints"`

	// Container is the NeoFS container ID for block storage
	Container string `yaml:"container"`

	// Timeout for NeoFS operations
	Timeout time.Duration `yaml:"timeout"`

	// Key is the path to the wallet key file for authentication
	Key string `yaml:"key"`

	// DialTimeout for initial connection
	DialTimeout time.Duration `yaml:"dial_timeout"`

	// StreamTimeout for streaming operations
	StreamTimeout time.Duration `yaml:"stream_timeout"`

	// HealthcheckTimeout for node health verification
	HealthcheckTimeout time.Duration `yaml:"healthcheck_timeout"`

	// RebalanceInterval for endpoint rotation
	RebalanceInterval time.Duration `yaml:"rebalance_interval"`

	// SessionExpirationDuration for session tokens
	SessionExpirationDuration uint64 `yaml:"session_expiration_duration"`
}

// LocalConfig configures local filesystem storage.
type LocalConfig struct {
	// Path is the base directory for storage
	Path string `yaml:"path"`

	// MaxSize is the maximum storage size in bytes (0 = unlimited)
	MaxSize int64 `yaml:"max_size"`

	// Compression enables data compression
	Compression bool `yaml:"compression"`
}

// S3Config configures S3-compatible storage.
type S3Config struct {
	// Endpoint is the S3 API endpoint (empty for AWS)
	Endpoint string `yaml:"endpoint"`

	// Region is the AWS region or equivalent
	Region string `yaml:"region"`

	// Bucket is the S3 bucket name
	Bucket string `yaml:"bucket"`

	// AccessKey for authentication
	AccessKey string `yaml:"access_key"`

	// SecretKey for authentication
	SecretKey string `yaml:"secret_key"`

	// UsePathStyle forces path-style URLs (required for some providers)
	UsePathStyle bool `yaml:"use_path_style"`

	// DisableSSL for non-TLS endpoints (not recommended for production)
	DisableSSL bool `yaml:"disable_ssl"`
}

// DefaultConfig returns a configuration with sensible defaults.
func DefaultConfig() Config {
	return Config{
		Provider: "local",
		NeoFS: NeoFSConfig{
			Timeout:                   30 * time.Second,
			DialTimeout:               5 * time.Second,
			StreamTimeout:             60 * time.Second,
			HealthcheckTimeout:        10 * time.Second,
			RebalanceInterval:         60 * time.Second,
			SessionExpirationDuration: 28800, // 8 hours in blocks
		},
		Local: LocalConfig{
			Path:        "./storage",
			Compression: true,
		},
		S3: S3Config{
			Region: "us-east-1",
		},
	}
}