config

type AuthnConfig struct {

	// Method is the authentication method that should be enforced (e.g. 'none', 'preshared',
	// 'oidc')
	Method                   string
	*AuthnOIDCConfig         `mapstructure:"oidc"`
	*AuthnPresharedKeyConfig `mapstructure:"preshared"`
}

type AuthnOIDCConfig struct {
	Issuer        string
	IssuerAliases []string
	Audience      string
}

type AuthnPresharedKeyConfig struct {
	// Keys define the preshared keys to verify authn tokens against.
	Keys []string
}

type CheckQueryCache struct {
	Enabled bool
	Limit   uint32 // (in items)
	TTL     time.Duration
}

type Config struct {

	// ListObjectsDeadline defines the maximum amount of time to accumulate ListObjects results
	// before the server will respond. This is to protect the server from misuse of the
	// ListObjects endpoints. It cannot be larger than HTTPConfig.UpstreamTimeout.
	ListObjectsDeadline time.Duration

	// ListObjectsMaxResults defines the maximum number of results to accumulate
	// before the non-streaming ListObjects API will respond to the client.
	// This is to protect the server from misuse of the ListObjects endpoints.
	ListObjectsMaxResults uint32

	// MaxTuplesPerWrite defines the maximum number of tuples per Write endpoint.
	MaxTuplesPerWrite int

	// MaxTypesPerAuthorizationModel defines the maximum number of type definitions per
	// authorization model for the WriteAuthorizationModel endpoint.
	MaxTypesPerAuthorizationModel int

	// MaxAuthorizationModelSizeInBytes defines the maximum size in bytes allowed for
	// persisting an Authorization Model.
	MaxAuthorizationModelSizeInBytes int

	// MaxConcurrentReadsForListObjects defines the maximum number of concurrent database reads
	// allowed in ListObjects queries
	MaxConcurrentReadsForListObjects uint32

	// MaxConcurrentReadsForCheck defines the maximum number of concurrent database reads allowed in
	// Check queries
	MaxConcurrentReadsForCheck uint32

	// ChangelogHorizonOffset is an offset in minutes from the current time. Changes that occur
	// after this offset will not be included in the response of ReadChanges.
	ChangelogHorizonOffset int

	// Experimentals is a list of the experimental features to enable in the OpenFGA server.
	Experimentals []string

	// ResolveNodeLimit indicates how deeply nested an authorization model can be before a query
	// errors out.
	ResolveNodeLimit uint32

	// ResolveNodeBreadthLimit indicates how many nodes on a given level can be evaluated
	// concurrently in a query
	ResolveNodeBreadthLimit uint32

	Datastore          DatastoreConfig
	GRPC               GRPCConfig
	HTTP               HTTPConfig
	Authn              AuthnConfig
	Log                LogConfig
	Trace              TraceConfig
	Playground         PlaygroundConfig
	Profiler           ProfilerConfig
	Metrics            MetricConfig
	CheckQueryCache    CheckQueryCache
	DispatchThrottling DispatchThrottlingConfig

	RequestDurationDatastoreQueryCountBuckets []string
	RequestDurationDispatchCountBuckets       []string
}

type DatastoreConfig struct {
	// Engine is the datastore engine to use (e.g. 'memory', 'postgres', 'mysql')
	Engine   string
	URI      string
	Username string
	Password string

	// MaxCacheSize is the maximum number of cache keys that the storage cache can store before
	// evicting
	// old keys. The storage cache is used to cache query results for various static resources
	// such as type definitions.
	MaxCacheSize int

	// MaxOpenConns is the maximum number of open connections to the database.
	MaxOpenConns int

	// MaxIdleConns is the maximum number of connections to the datastore in the idle connection
	// pool.
	MaxIdleConns int

	// ConnMaxIdleTime is the maximum amount of time a connection to the datastore may be idle.
	ConnMaxIdleTime time.Duration

	// ConnMaxLifetime is the maximum amount of time a connection to the datastore may be reused.
	ConnMaxLifetime time.Duration

	// Metrics is configuration for the Datastore metrics.
	Metrics DatastoreMetricsConfig
}

type DatastoreMetricsConfig struct {
	// Enabled enables export of the Datastore metrics.
	Enabled bool
}

type DispatchThrottlingConfig struct {
	Enabled   bool
	Frequency time.Duration
	Threshold uint32
}

type GRPCConfig struct {
	Addr string
	TLS  *TLSConfig
}

type HTTPConfig struct {
	Enabled bool
	Addr    string
	TLS     *TLSConfig

	// UpstreamTimeout is the timeout duration for proxying HTTP requests upstream
	// to the grpc endpoint. It cannot be smaller than Config.ListObjectsDeadline.
	UpstreamTimeout time.Duration

	CORSAllowedOrigins []string
	CORSAllowedHeaders []string
}

type LogConfig struct {
	// Format is the log format to use in the log output (e.g. 'text' or 'json')
	Format string

	// Level is the log level to use in the log output (e.g. 'none', 'debug', or 'info')
	Level string

	// Format of the timestamp in the log output (e.g. 'Unix'(default) or 'ISO8601')
	TimestampFormat string
}

type MetricConfig struct {
	Enabled             bool
	Addr                string
	EnableRPCHistograms bool
}

type OTLPTraceConfig struct {
	Endpoint string
	TLS      OTLPTraceTLSConfig
}

type OTLPTraceTLSConfig struct {
	Enabled bool
}

type PlaygroundConfig struct {
	Enabled bool
	Port    int
}

type ProfilerConfig struct {
	Enabled bool
	Addr    string
}

type TLSConfig struct {
	Enabled  bool
	CertPath string `mapstructure:"cert"`
	KeyPath  string `mapstructure:"key"`
}

type TraceConfig struct {
	Enabled     bool
	OTLP        OTLPTraceConfig `mapstructure:"otlp"`
	SampleRatio float64
	ServiceName string
}