config

type AgentConfig struct {
	ToolTimeout       time.Duration `koanf:"tool_timeout"`        // default 30s
	MaxIterations     int           `koanf:"max_iterations"`      // default 50
	CompressThreshold int           `koanf:"compress_threshold"`  // 0 = derive from ContextWindow/2, disabled if ContextWindow also 0
	KeepRecentRounds  int           `koanf:"keep_recent_rounds"`  // default 5
	MaxToolResultLen  int           `koanf:"max_tool_result_len"` // default 50000
	MaxContentLength  int           `koanf:"max_content_length"`  // max user message content length in characters, default 100000
	TypingInterval    time.Duration `koanf:"typing_interval"`     // default 5s

	// Phase 33: LLM retry configuration
	LLMMaxRetries     int           `koanf:"llm_max_retries"`      // default 3
	LLMRetryBaseDelay time.Duration `koanf:"llm_retry_base_delay"` // default 1s (exponential backoff base)
	LLMRetryMaxDelay  time.Duration `koanf:"llm_retry_max_delay"`  // default 30s (cap for exponential backoff)
}

type Config struct {
	Listen    string          `koanf:"listen"`
	Log       LogConfig       `koanf:"log"`
	Database  DatabaseConfig  `koanf:"database"`
	Redis     RedisConfig     `koanf:"redis"`
	Queue     QueueConfig     `koanf:"queue"`
	LLM       LLMConfig       `koanf:"llm"`
	WebSocket WebSocketConfig `koanf:"websocket"`
	Session   SessionConfig   `koanf:"session"`
	Agent     AgentConfig     `koanf:"agent"`
	Webhook   WebhookConfig   `koanf:"webhook"`
	Security  SecurityConfig  `koanf:"security"`
	Telemetry TelemetryConfig `koanf:"telemetry"`
}

type DatabaseConfig struct {
	Dialect         string `koanf:"dialect"` // postgres, sqlite, mysql
	DSN             string `koanf:"dsn"`
	MaxOpenConns    int    `koanf:"max_open_conns"`    // default 25
	MaxIdleConns    int    `koanf:"max_idle_conns"`    // default 5
	ConnMaxLifetime int    `koanf:"conn_max_lifetime"` // seconds, default 300
	AutoMigrate     bool   `koanf:"auto_migrate"`      // default true
}

type LLMConfig struct {
	Provider      string `koanf:"provider"`
	APIKey        string `koanf:"apikey"`
	BaseURL       string `koanf:"baseurl"`
	Model         string `koanf:"model"`
	MaxTokens     int    `koanf:"max_tokens"`
	ContextWindow int    `koanf:"context_window"` // default 128000
}

type LogConfig struct {
	Level string `koanf:"level"`
	File  string `koanf:"file"`
}

type LogLevelHandler struct {
	// contains filtered or unexported fields
}

type MetricsConfig struct {
	Enabled     bool   `koanf:"enabled"`
	Path        string `koanf:"path"`         // default "/metrics"
	RequireAuth bool   `koanf:"require_auth"` // require API key authentication, default true
}

type QueueConfig struct {
	Concurrency int `koanf:"concurrency"` // worker count, default 10
}

type RedisConfig struct {
	URL      string `koanf:"url"`
	PoolSize int    `koanf:"pool_size"`
}

type SecurityConfig struct {
	APIKey         string  `koanf:"apikey"`           // X-API-Key header value (empty = no auth)
	RequireAPIKey  bool    `koanf:"require_api_key"`  // require API Key to be configured (default true)
	RateLimitRPS   float64 `koanf:"rate_limit_rps"`   // requests per second per key, default 100
	RateLimitBurst int     `koanf:"rate_limit_burst"` // burst size, default 200
	MaxRequestBody int64   `koanf:"max_request_body"` // max HTTP body bytes, default 1MB
}

type SessionConfig struct {
	FetchDebounce time.Duration `koanf:"fetch_debounce"` // default 300ms
}

type TelemetryConfig struct {
	Metrics MetricsConfig `koanf:"metrics"`
	Tracing TracingConfig `koanf:"tracing"`
}

type TracingConfig struct {
	Enabled        bool    `koanf:"enabled"`
	Endpoint       string  `koanf:"endpoint"`        // OTLP collector endpoint
	SamplingRate   float64 `koanf:"sampling_rate"`   // 0.0-1.0, default 1.0
	Insecure       bool    `koanf:"insecure"`        // skip TLS (default false)
	ServiceVersion string  `koanf:"service_version"` // e.g. "1.0.0"
	Environment    string  `koanf:"environment"`     // e.g. "production"
}

type WebSocketConfig struct {
	PingInterval  time.Duration `koanf:"ping_interval"`
	PongTimeout   time.Duration `koanf:"pong_timeout"`
	MinSDKVersion int           `koanf:"min_sdk_version"`
	GracePeriod   time.Duration `koanf:"grace_period"`

	// Phase 23: connection count and drain
	MaxConnsPerUser   int           `koanf:"max_conns_per_user"`  // default 10
	ConnRenewInterval time.Duration `koanf:"conn_renew_interval"` // default 120s
	ConnCountTTL      time.Duration `koanf:"conn_count_ttl"`      // default 360s
	DrainTimeout      time.Duration `koanf:"drain_timeout"`       // default 5s
	AllowedOrigins    []string      `koanf:"allowed_origins"`     // allowed WebSocket origin patterns (empty = localhost only for dev safety)
	MessageRateLimit  int           `koanf:"message_rate_limit"`  // messages per second per connection (0 = disabled)
	MessageBurstSize  int           `koanf:"message_burst_size"`  // burst size (0 = 2x rate limit)
}

type WebhookConfig struct {
	URL         string        `koanf:"url"`          // global webhook URL (empty = disabled)
	HTTPTimeout time.Duration `koanf:"http_timeout"` // HTTP request timeout, default 10s
	MaxRetry    int           `koanf:"max_retry"`    // max retry count, default 5
	Secret      string        `koanf:"secret"`       // HMAC-SHA256 signing secret (empty = no signature)
}