config

type AggregationConfig struct {
	// ConflictResolution is the strategy: "prefix", "priority", "manual"
	ConflictResolution vmcp.ConflictResolutionStrategy `json:"conflict_resolution" yaml:"conflict_resolution"`

	// ConflictResolutionConfig contains strategy-specific configuration.
	ConflictResolutionConfig *ConflictResolutionConfig `json:"conflict_resolution_config,omitempty" yaml:"conflict_resolution_config,omitempty"` //nolint:lll

	// Tools contains per-workload tool configuration.
	Tools []*WorkloadToolConfig `json:"tools,omitempty" yaml:"tools,omitempty"`
}

type AuthzConfig struct {
	// Type is the authz type: "cedar", "none"
	Type string `json:"type" yaml:"type"`

	// Policies contains Cedar policy definitions (when Type = "cedar").
	Policies []string `json:"policies,omitempty" yaml:"policies,omitempty"`
}

type BackendAuthStrategy struct {
	// Type is the auth strategy: "pass_through", "token_exchange", "client_credentials",
	// "service_account", "header_injection", "oauth_proxy"
	Type string `json:"type" yaml:"type"`

	// Metadata contains strategy-specific configuration.
	// This is opaque and interpreted by the auth strategy implementation.
	Metadata map[string]any `json:"metadata,omitempty" yaml:"metadata,omitempty"`
}

type CircuitBreakerConfig struct {
	// Enabled indicates if circuit breaker is enabled.
	Enabled bool `json:"enabled" yaml:"enabled"`

	// FailureThreshold is how many failures trigger open circuit.
	FailureThreshold int `json:"failure_threshold" yaml:"failure_threshold"`

	// Timeout is how long to keep circuit open.
	Timeout Duration `json:"timeout" yaml:"timeout"`
}

type CompositeToolConfig struct {
	// Name is the workflow name (unique identifier).
	Name string `json:"name"`

	// Description describes what the workflow does.
	Description string `json:"description,omitempty"`

	// Parameters defines input parameter schema.
	Parameters map[string]ParameterSchema `json:"parameters,omitempty"`

	// Timeout is the maximum workflow execution time.
	Timeout Duration `json:"timeout,omitempty"`

	// Steps are the workflow steps to execute.
	Steps []*WorkflowStepConfig `json:"steps"`
}

type Config struct {
	// Name is the virtual MCP server name.
	Name string `json:"name" yaml:"name"`

	// Group references the ToolHive group containing backend workloads.
	Group string `json:"group_ref" yaml:"group"`

	// IncomingAuth configures how clients authenticate to the virtual MCP server.
	IncomingAuth *IncomingAuthConfig `json:"incoming_auth,omitempty" yaml:"incoming_auth,omitempty"`

	// OutgoingAuth configures how the virtual MCP server authenticates to backends.
	OutgoingAuth *OutgoingAuthConfig `json:"outgoing_auth,omitempty" yaml:"outgoing_auth,omitempty"`

	// Aggregation configures capability aggregation and conflict resolution.
	Aggregation *AggregationConfig `json:"aggregation,omitempty" yaml:"aggregation,omitempty"`

	// CompositeTools defines inline composite tool workflows.
	// Full workflow definitions are embedded in the configuration.
	// For Kubernetes, complex workflows can also reference VirtualMCPCompositeToolDefinition CRDs.
	CompositeTools []*CompositeToolConfig `json:"composite_tools,omitempty" yaml:"composite_tools,omitempty"`

	// TokenCache configures token caching.
	TokenCache *TokenCacheConfig `json:"token_cache,omitempty" yaml:"token_cache,omitempty"`

	// Operational configures operational settings.
	Operational *OperationalConfig `json:"operational,omitempty" yaml:"operational,omitempty"`

	// Metadata stores additional configuration metadata.
	Metadata map[string]string `json:"metadata,omitempty" yaml:"metadata,omitempty"`
}

type ConflictResolutionConfig struct {
	// PrefixFormat is the prefix format (for prefix strategy).
	// Options: "{workload}", "{workload}_", "{workload}.", custom string
	PrefixFormat string `json:"prefix_format,omitempty" yaml:"prefix_format,omitempty"`

	// PriorityOrder is the explicit priority ordering (for priority strategy).
	PriorityOrder []string `json:"priority_order,omitempty" yaml:"priority_order,omitempty"`
}

type DefaultValidator struct{}

type Duration time.Duration

type ElicitationResponseConfig struct {
	// Action: "skip_remaining", "abort", "continue"
	Action string `json:"action"`
}

type FailureHandlingConfig struct {
	// HealthCheckInterval is how often to check backend health.
	HealthCheckInterval Duration `json:"health_check_interval" yaml:"health_check_interval"`

	// UnhealthyThreshold is how many failures before marking unhealthy.
	UnhealthyThreshold int `json:"unhealthy_threshold" yaml:"unhealthy_threshold"`

	// PartialFailureMode defines behavior when some backends fail.
	// Options: "fail" (fail entire request), "best_effort" (return partial results)
	PartialFailureMode string `json:"partial_failure_mode" yaml:"partial_failure_mode"`

	// CircuitBreaker configures circuit breaker settings.
	CircuitBreaker *CircuitBreakerConfig `json:"circuit_breaker,omitempty" yaml:"circuit_breaker,omitempty"`
}

type IncomingAuthConfig struct {
	// Type is the auth type: "oidc", "local", "anonymous"
	Type string `json:"type" yaml:"type"`

	// OIDC contains OIDC configuration (when Type = "oidc").
	OIDC *OIDCConfig `json:"oidc,omitempty" yaml:"oidc,omitempty"`

	// Authz contains authorization configuration (optional).
	Authz *AuthzConfig `json:"authz,omitempty" yaml:"authz,omitempty"`
}

type Loader interface {
	// Load loads configuration from the source.
	Load() (*Config, error)
}

type MemoryCacheConfig struct {
	// MaxEntries is the maximum number of cached tokens.
	MaxEntries int `json:"max_entries" yaml:"max_entries"`

	// TTLOffset is how long before expiry to refresh tokens.
	TTLOffset Duration `json:"ttl_offset" yaml:"ttl_offset"`
}

type OIDCConfig struct {
	// Issuer is the OIDC issuer URL.
	Issuer string `json:"issuer" yaml:"issuer"`

	// ClientID is the OAuth client ID.
	ClientID string `json:"client_id" yaml:"client_id"`

	// ClientSecretEnv is the name of the environment variable containing the client secret.
	// This is the secure way to reference secrets - the actual secret value is never stored
	// in configuration files, only the environment variable name.
	// The secret value will be resolved from this environment variable at runtime.
	ClientSecretEnv string `json:"client_secret_env,omitempty" yaml:"client_secret_env,omitempty"`

	// Audience is the required token audience.
	Audience string `json:"audience" yaml:"audience"`

	// Resource is the OAuth 2.0 resource indicator (RFC 8707).
	// Used in WWW-Authenticate header and OAuth discovery metadata (RFC 9728).
	// If not specified, defaults to Audience.
	Resource string `json:"resource,omitempty" yaml:"resource,omitempty"`

	// Scopes are the required OAuth scopes.
	Scopes []string `json:"scopes,omitempty" yaml:"scopes,omitempty"`
}

type OperationalConfig struct {
	// Timeouts configures request timeouts.
	Timeouts *TimeoutConfig `json:"timeouts,omitempty" yaml:"timeouts,omitempty"`

	// FailureHandling configures failure handling.
	FailureHandling *FailureHandlingConfig `json:"failure_handling,omitempty" yaml:"failure_handling,omitempty"`
}

type OutgoingAuthConfig struct {
	// Source defines how to discover backend auth: "inline", "discovered", "mixed"
	// - inline: Explicit configuration in OutgoingAuth
	// - discovered: Auto-discover from backend MCPServer.externalAuthConfigRef (Kubernetes only)
	// - mixed: Discover with selective overrides
	Source string `json:"source" yaml:"source"`

	// Default is the default auth strategy for backends without explicit config.
	Default *BackendAuthStrategy `json:"default,omitempty" yaml:"default,omitempty"`

	// Backends contains per-backend auth configuration.
	Backends map[string]*BackendAuthStrategy `json:"backends,omitempty" yaml:"backends,omitempty"`
}

type ParameterSchema struct {
	// Type is the parameter type (e.g., "string", "integer").
	Type string `json:"type"`

	// Default is the default value (optional).
	Default any `json:"default,omitempty"`
}

type RedisCacheConfig struct {
	// Address is the Redis server address.
	Address string `json:"address" yaml:"address"`

	// DB is the Redis database number.
	DB int `json:"db" yaml:"db"`

	// KeyPrefix is the prefix for cache keys.
	KeyPrefix string `json:"key_prefix,omitempty" yaml:"key_prefix,omitempty"`

	// Password is the Redis password (or secret reference).
	Password string `json:"password,omitempty" yaml:"password,omitempty"`

	// TTLOffset is how long before expiry to refresh tokens.
	TTLOffset Duration `json:"ttl_offset" yaml:"ttl_offset"`
}

type StepErrorHandling struct {
	// Action: "abort", "continue", "retry"
	Action string `json:"action"`

	// RetryCount is the number of retry attempts (for retry action).
	RetryCount int `json:"retry_count,omitempty"`

	// RetryDelay is the initial delay between retries.
	RetryDelay Duration `json:"retry_delay,omitempty"`
}

type TimeoutConfig struct {
	// Default is the default timeout for backend requests.
	Default Duration `json:"default" yaml:"default"`

	// PerWorkload contains per-workload timeout overrides.
	PerWorkload map[string]Duration `json:"per_workload,omitempty" yaml:"per_workload,omitempty"`
}

type TokenCacheConfig struct {
	// Provider is the cache provider: "memory", "redis"
	Provider string `json:"provider" yaml:"provider"`

	// Memory contains memory cache config (when Provider = "memory").
	Memory *MemoryCacheConfig `json:"memory,omitempty" yaml:"memory,omitempty"`

	// Redis contains Redis cache config (when Provider = "redis").
	Redis *RedisCacheConfig `json:"redis,omitempty" yaml:"redis,omitempty"`
}

type ToolOverride struct {
	// Name is the new tool name (for renaming).
	Name string `json:"name,omitempty" yaml:"name,omitempty"`

	// Description is the new tool description (for updating).
	Description string `json:"description,omitempty" yaml:"description,omitempty"`
}

type Validator interface {
	// Validate checks if the configuration is valid.
	// Returns detailed validation errors.
	Validate(cfg *Config) error
}

type WorkflowStepConfig struct {
	// ID uniquely identifies this step.
	ID string `json:"id"`

	// Type is the step type: "tool", "elicitation"
	Type string `json:"type"`

	// Tool is the tool name to call (for tool steps).
	Tool string `json:"tool,omitempty"`

	// Arguments are the tool arguments (supports template expansion).
	Arguments map[string]any `json:"arguments,omitempty"`

	// Condition is an optional execution condition (template syntax).
	Condition string `json:"condition,omitempty"`

	// DependsOn lists step IDs that must complete first (for DAG execution).
	DependsOn []string `json:"depends_on,omitempty"`

	// OnError defines error handling for this step.
	OnError *StepErrorHandling `json:"on_error,omitempty"`

	// Elicitation config (for elicitation steps).
	Message string         `json:"message,omitempty"` // Elicitation message
	Schema  map[string]any `json:"schema,omitempty"`  // JSON Schema for requested data
	Timeout Duration       `json:"timeout,omitempty"` // Elicitation timeout

	// Elicitation response handlers.
	OnDecline *ElicitationResponseConfig `json:"on_decline,omitempty"`
	OnCancel  *ElicitationResponseConfig `json:"on_cancel,omitempty"`
}

type WorkloadToolConfig struct {
	// Workload is the workload name/ID.
	Workload string `json:"workload" yaml:"workload"`

	// Filter is the list of tools to include (nil = include all).
	Filter []string `json:"filter,omitempty" yaml:"filter,omitempty"`

	// Overrides maps tool names to override configurations.
	Overrides map[string]*ToolOverride `json:"overrides,omitempty" yaml:"overrides,omitempty"`
}

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