package config

import "time"

// SubsystemConfig holds configuration for individual subsystems
type SubsystemConfig struct {
	// Execution settings
	Enabled bool          `json:"enabled"`
	Timeout time.Duration `json:"timeout"` // Timeout for this subsystem

	// Circuit breaker settings
	CircuitBreaker CircuitBreakerConfig `json:"circuit_breaker"`
}

// CircuitBreakerConfig holds circuit breaker settings for subsystems
type CircuitBreakerConfig struct {
	// Enabled controls whether circuit breaker is active
	Enabled bool `json:"enabled"`

	// FailureThreshold is the number of consecutive failures before opening the circuit
	FailureThreshold int `json:"failure_threshold"`

	// FailureWindow is the time window to track failures (e.g., 3 failures in 10 minutes)
	FailureWindow time.Duration `json:"failure_window"`

	// OpenDuration is how long the circuit stays open before attempting recovery
	OpenDuration time.Duration `json:"open_duration"`

	// HalfOpenAttempts is the number of test attempts in half-open state before fully closing
	HalfOpenAttempts int `json:"half_open_attempts"`
}

// SubsystemsConfig holds all subsystem configurations
type SubsystemsConfig struct {
	APT     SubsystemConfig `json:"apt"`
	DNF     SubsystemConfig `json:"dnf"`
	Docker  SubsystemConfig `json:"docker"`
	Windows SubsystemConfig `json:"windows"`
	Winget  SubsystemConfig `json:"winget"`
	Storage SubsystemConfig `json:"storage"`
}

// GetDefaultSubsystemsConfig returns default subsystem configurations
func GetDefaultSubsystemsConfig() SubsystemsConfig {
	// Default circuit breaker config
	defaultCB := CircuitBreakerConfig{
		Enabled:          true,
		FailureThreshold: 3,           // 3 consecutive failures
		FailureWindow:    10 * time.Minute, // within 10 minutes
		OpenDuration:     30 * time.Minute, // circuit open for 30 min
		HalfOpenAttempts: 2,           // 2 successful attempts to close circuit
	}

	// Aggressive circuit breaker for Windows Update (known to be slow/problematic)
	windowsCB := CircuitBreakerConfig{
		Enabled:          true,
		FailureThreshold: 2,           // Only 2 failures
		FailureWindow:    15 * time.Minute,
		OpenDuration:     60 * time.Minute, // Open for 1 hour
		HalfOpenAttempts: 3,
	}

	return SubsystemsConfig{
		APT: SubsystemConfig{
			Enabled:        true,
			Timeout:        30 * time.Second,
			CircuitBreaker: defaultCB,
		},
		DNF: SubsystemConfig{
			Enabled:        true,
			Timeout:        15 * time.Minute, // TODO: Make scanner timeouts user-adjustable via settings. DNF operations can take a long time on large systems
			CircuitBreaker: defaultCB,
		},
		Docker: SubsystemConfig{
			Enabled:        true,
			Timeout:        60 * time.Second, // Registry queries can be slow
			CircuitBreaker: defaultCB,
		},
		Windows: SubsystemConfig{
			Enabled:        true,
			Timeout:        10 * time.Minute, // Windows Update can be VERY slow
			CircuitBreaker: windowsCB,
		},
		Winget: SubsystemConfig{
			Enabled:        true,
			Timeout:        2 * time.Minute, // Winget has multiple retry strategies
			CircuitBreaker: defaultCB,
		},
		Storage: SubsystemConfig{
			Enabled:        true,
			Timeout:        10 * time.Second, // Disk info should be fast
			CircuitBreaker: defaultCB,
		},
	}
}