config

type BackupConfig struct {
	Cron         string                   `json:"cron" env:"PGRWL_BACKUP_CRON"`
	Retention    BackupRetentionConfig    `json:"retention,omitzero"`
	WalRetention BackupWalRetentionConfig `json:"walretention,omitzero"`
}

type BackupRetentionConfig struct {
	// Enable determines whether retention logic is active.
	Enable bool `json:"enable,omitzero" env:"PGRWL_BACKUP_RETENTION_ENABLE"`

	Type  string `json:"type,omitzero" env:"PGRWL_BACKUP_RETENTION_TYPE"`
	Value string `json:"value,omitzero" env:"PGRWL_BACKUP_RETENTION_VALUE"`

	KeepDurationParsed time.Duration `json:"-"`
	KeepCountParsed    int64         `json:"-"`

	KeepLast *int `json:"keep_last,omitzero" env:"PGRWL_BACKUP_RETENTION_KEEP_LAST"`
}

type BackupWalRetentionConfig struct {
	Enable       bool   `json:"enable,omitzero" env:"PGRWL_BACKUP_WALRETENTION_ENABLE"`
	ReceiverAddr string `json:"receiver_addr,omitzero" env:"PGRWL_BACKUP_WALRETENTION_RECEIVER_ADDR"`
}

type CompressionConfig struct {
	// Algo is the compression algorithm ("gzip", "zstd", etc.).
	Algo string `json:"algo,omitzero" env:"PGRWL_STORAGE_COMPRESSION_ALGO"`
}

type Config struct {
	Main      MainConfig    `json:"main,omitzero"`      // Main application settings.
	Receiver  ReceiveConfig `json:"receiver,omitzero"`  // WAL receiver configuration.
	Metrics   MetricsConfig `json:"metrics,omitzero"`   // Prometheus metrics configuration.
	Log       LogConfig     `json:"log,omitzero"`       // Logging configuration.
	Storage   StorageConfig `json:"storage,omitzero"`   // Storage backend configuration.
	DevConfig DevConfig     `json:"devconfig,omitzero"` // Various dev options.
	Backup    BackupConfig  `json:"backup,omitzero"`    // Streaming basebackup options.
}

type DevConfig struct {
	Pprof DevConfigPprof `json:"pprof,omitzero"`
}

type DevConfigPprof struct {
	Enable bool `json:"enable,omitzero" env:"PGRWL_DEVCONFIG_PPROF_ENABLE"`
}

type EncryptionConfig struct {
	// Algo is the encryption algorithm identifier ("aes-256-gcm", etc.).
	Algo string `json:"algo,omitzero" env:"PGRWL_STORAGE_ENCRYPTION_ALGO"`

	// Pass is the encryption passphrase.
	Pass string `json:"pass,omitzero" env:"PGRWL_STORAGE_ENCRYPTION_PASS"`
}

type LogConfig struct {
	// Level sets the log level (e.g., "trace", "debug", "info", "warn", "error").
	Level string `json:"level,omitzero" env:"PGRWL_LOG_LEVEL"`

	// Format sets the log format ("text" or "json").
	Format string `json:"format,omitzero" env:"PGRWL_LOG_FORMAT"`

	// AddSource includes source file and line in log entries.
	AddSource bool `json:"add_source,omitzero" env:"PGRWL_LOG_ADD_SOURCE"`
}

type MainConfig struct {
	// ListenPort is the TCP port for the management HTTP server.
	ListenPort int `json:"listen_port,omitzero" env:"PGRWL_MAIN_LISTEN_PORT"`

	// Directory is the base directory where WAL files and metadata are stored.
	Directory string `json:"directory,omitzero" env:"PGRWL_MAIN_DIRECTORY"`
}

type MetricsConfig struct {
	// Enable turns on Prometheus metrics HTTP endpoint.
	Enable bool `json:"enable,omitzero" env:"PGRWL_METRICS_ENABLE"`
}

type ReceiveConfig struct {
	// Slot is the replication slot name used to stream WAL from PostgreSQL.
	Slot string `json:"slot,omitzero" env:"PGRWL_RECEIVER_SLOT"`

	// NoLoop disables automatic reconnection loops on connection loss.
	NoLoop bool `json:"no_loop,omitzero" env:"PGRWL_RECEIVER_NO_LOOP"`

	// Uploader worker configuration.
	Uploader UploadConfig `json:"uploader,omitzero"`

	// Retention policy configuration.
	Retention RetentionConfig `json:"retention,omitzero"`
}

type RetentionConfig struct {
	// Enable determines whether retention logic is active.
	Enable bool `json:"enable,omitzero" env:"PGRWL_RECEIVER_RETENTION_ENABLE"`

	// SyncInterval is the interval between retention scans (e.g., "12h").
	// Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h".
	SyncInterval       string        `json:"sync_interval" env:"PGRWL_RECEIVER_RETENTION_SYNC_INTERVAL"`
	SyncIntervalParsed time.Duration `json:"-"`

	// KeepPeriod defines how long to keep old WAL files (e.g., "72h").
	KeepPeriod       string        `json:"keep_period,omitzero" env:"PGRWL_RECEIVER_RETENTION_KEEP_PERIOD"`
	KeepPeriodParsed time.Duration `json:"-"`
}

type S3Config struct {
	// URL is the S3-compatible endpoint URL (e.g., "https://s3.amazonaws.com").
	URL string `json:"url,omitzero" env:"PGRWL_STORAGE_S3_URL"`

	// AccessKeyID is the S3 access key ID.
	AccessKeyID string `json:"access_key_id,omitzero" env:"PGRWL_STORAGE_S3_ACCESS_KEY_ID"`

	// SecretAccessKey is the S3 secret access key.
	SecretAccessKey string `json:"secret_access_key,omitzero" env:"PGRWL_STORAGE_S3_SECRET_ACCESS_KEY"`

	// Bucket is the name of the S3 bucket to store WAL files.
	Bucket string `json:"bucket,omitzero" env:"PGRWL_STORAGE_S3_BUCKET"`

	// Region is the AWS region (for Amazon S3).
	Region string `json:"region,omitzero" env:"PGRWL_STORAGE_S3_REGION"`

	// UsePathStyle forces path-style requests instead of virtual-hosted style.
	UsePathStyle bool `json:"use_path_style,omitzero" env:"PGRWL_STORAGE_S3_USE_PATH_STYLE"`

	// DisableSSL disables HTTPS for connections to the S3 endpoint.
	DisableSSL bool `json:"disable_ssl,omitzero" env:"PGRWL_STORAGE_S3_DISABLE_SSL"`
}

type SFTPConfig struct {
	// Host is the SFTP server hostname or IP.
	Host string `json:"host,omitzero" env:"PGRWL_STORAGE_SFTP_HOST"`

	// Port is the TCP port for the SFTP server.
	Port int `json:"port,omitzero" env:"PGRWL_STORAGE_SFTP_PORT"`

	// User is the username for SFTP authentication.
	User string `json:"user,omitzero" env:"PGRWL_STORAGE_SFTP_USER"`

	// Pass is the password for SFTP authentication (if not using a key).
	Pass string `json:"pass,omitzero" env:"PGRWL_STORAGE_SFTP_PASS"`

	// PKeyPath is the file path to the private key for key-based authentication.
	PKeyPath string `json:"pkey_path,omitzero" env:"PGRWL_STORAGE_SFTP_PKEY_PATH"`

	// PKeyPass is the passphrase for the private key, if encrypted.
	PKeyPass string `json:"pkey_pass,omitzero" env:"PGRWL_STORAGE_SFTP_PKEY_PASS"`

	// Base directory with sufficient user permissions
	BaseDir string `json:"base_dir,omitzero" env:"PGRWL_STORAGE_SFTP_BASE_DIR"`
}

type StorageConfig struct {
	// Name specifies the storage backend to use ("s3", "sftp", etc.).
	Name string `json:"name,omitzero" env:"PGRWL_STORAGE_NAME"`

	// Compression defines compression settings for stored WAL files.
	Compression CompressionConfig `json:"compression,omitzero"`

	// Encryption defines encryption settings for stored WAL files.
	Encryption EncryptionConfig `json:"encryption,omitzero"`

	// SFTP holds configuration specific to the SFTP backend.
	SFTP SFTPConfig `json:"sftp,omitzero"`

	// S3 holds configuration specific to the S3 backend.
	S3 S3Config `json:"s3,omitzero"`
}

type UploadConfig struct {
	// SyncInterval is the interval between upload checks (e.g., "10s", "5m").
	// Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h".
	SyncInterval       string        `json:"sync_interval" env:"PGRWL_RECEIVER_UPLOADER_SYNC_INTERVAL"`
	SyncIntervalParsed time.Duration `json:"-"`

	// MaxConcurrency is the maximum number of concurrent upload tasks.
	MaxConcurrency int `json:"max_concurrency" env:"PGRWL_RECEIVER_UPLOADER_MAX_CONCURRENCY"`
}