package blobovniczaconfig

import (
	"time"

	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config"
	boltdbconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine/shard/boltdb"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/blobovniczatree"
)

// Config is a wrapper over the config section
// which provides access to Blobovnicza configurations.
type Config config.Config

const (
	// SizeDefault is a default limit of estimates of Blobovnicza size.
	SizeDefault = 1 << 30

	// ShallowDepthDefault is a default shallow dir depth.
	ShallowDepthDefault = 2

	// ShallowWidthDefault is a default shallow dir width.
	ShallowWidthDefault = 16

	// OpenedCacheSizeDefault is a default cache size of opened Blobovnicza's.
	OpenedCacheSizeDefault = 16

	// InitWorkerCountDefault is a default workers count to initialize Blobovnicza's.
	InitWorkerCountDefault = 5

	// RebuildDropTimeoutDefault is a default timeout value to wait before drop single blobovnicza.
	RebuildDropTimeoutDefault = 10 * time.Second
)

// From wraps config section into Config.
func From(c *config.Config) *Config {
	return (*Config)(c)
}

// Type returns the storage type.
func (x *Config) Type() string {
	return blobovniczatree.Type
}

// Size returns the value of "size" config parameter.
//
// Returns SizeDefault if the value is not a positive number.
func (x *Config) Size() uint64 {
	s := config.SizeInBytesSafe(
		(*config.Config)(x),
		"size",
	)

	if s > 0 {
		return s
	}

	return SizeDefault
}

// ShallowDepth returns the value of "depth" config parameter.
//
// Returns ShallowDepthDefault if the value is not a positive number.
func (x *Config) ShallowDepth() uint64 {
	d := config.UintSafe(
		(*config.Config)(x),
		"depth",
	)

	if d > 0 {
		return d
	}

	return ShallowDepthDefault
}

// ShallowWidth returns the value of "width" config parameter.
//
// Returns ShallowWidthDefault if the value is not a positive number.
func (x *Config) ShallowWidth() uint64 {
	d := config.UintSafe(
		(*config.Config)(x),
		"width",
	)

	if d > 0 {
		return d
	}

	return ShallowWidthDefault
}

// OpenedCacheSize returns the value of "opened_cache_capacity" config parameter.
//
// Returns OpenedCacheSizeDefault if the value is not a positive number.
func (x *Config) OpenedCacheSize() int {
	d := config.IntSafe(
		(*config.Config)(x),
		"opened_cache_capacity",
	)

	if d > 0 {
		return int(d)
	}

	return OpenedCacheSizeDefault
}

// BoltDB returns config instance for querying bolt db specific parameters.
func (x *Config) BoltDB() *boltdbconfig.Config {
	return (*boltdbconfig.Config)(x)
}

// LeafWidth returns the value of "leaf_width" config parameter.
//
// Returns 0 if the value is not a positive number.
func (x *Config) LeafWidth() uint64 {
	return config.UintSafe(
		(*config.Config)(x),
		"leaf_width",
	)
}

// InitWorkerCount returns the value of "init_worker_count" config parameter.
//
// Returns InitWorkerCountDefault if the value is not a positive number.
func (x *Config) InitWorkerCount() int {
	d := config.IntSafe(
		(*config.Config)(x),
		"init_worker_count",
	)

	if d > 0 {
		return int(d)
	}

	return InitWorkerCountDefault
}

// InitInAdvance returns the value of "init_in_advance" config parameter.
//
// Returns False if the value is not defined or invalid.
func (x *Config) InitInAdvance() bool {
	return config.BoolSafe(
		(*config.Config)(x),
		"init_in_advance",
	)
}

// RebuildDropTimeout returns the value of "rebuild_drop_timeout" config parameter.
//
// Returns RebuildDropTimeoutDefault if the value is not defined or invalid.
func (x *Config) RebuildDropTimeout() time.Duration {
	d := config.DurationSafe(
		(*config.Config)(x),
		"rebuild_drop_timeout",
	)
	if d > 0 {
		return d
	}
	return RebuildDropTimeoutDefault
}