package promptkit

import "go.maximumdirect.net/configkit"

// ProfileConfig is a presence-aware convenience value for an identified execution
// profile. Nil fields are omitted; non-nil pointers preserve zero and blank
// values. A nil ExtraParams map is omitted; a non-nil empty map supplies an
// empty mapping, not a clear operation. Raw ConfigKit Mapping inputs can
// express explicit null. ProfileConfig has no stable JSON representation.
// Extends, when supplied, names a sibling profile in the same resource list.
type ProfileConfig struct {
	// ID is the local profile identity within its resource list.
	ID                                string
	Extends, Backend, Endpoint, Model *string
	Temperature, TopP                 *float64
	MaxTokens, TimeoutSeconds         *int
	ServiceTier, ReasoningEffort      *string
	APIKeyEnv                         *string
	APIKeyRequired                    *bool
	ExtraParams                       map[string]any
}

// ProfileSource creates a labeled ConfigKit mapping containing profile records
// in caller order. IDs are explicit and duplicates are left for loading to reject.
// It encodes fields without validating them; NewEngine validates the final
// effective configuration after all selected source layers are combined.
// Mapping captures a copy of supported input values at creation; unsupported
// values fail when the source is loaded.
func ProfileSource(label string, profiles []ProfileConfig) configkit.Source {
	definitions := make([]any, 0, len(profiles))
	for _, config := range profiles {
		fields := map[string]any{"id": config.ID}
		if config.Extends != nil {
			fields["extends"] = map[string]any{"id": *config.Extends}
		}
		if config.Backend != nil {
			fields["backend"] = *config.Backend
		}
		if config.Endpoint != nil {
			fields["endpoint"] = *config.Endpoint
		}
		if config.Model != nil {
			fields["model"] = *config.Model
		}
		if config.Temperature != nil {
			fields["temperature"] = *config.Temperature
		}
		if config.TopP != nil {
			fields["top_p"] = *config.TopP
		}
		if config.MaxTokens != nil {
			fields["max_tokens"] = *config.MaxTokens
		}
		if config.TimeoutSeconds != nil {
			fields["timeout_seconds"] = *config.TimeoutSeconds
		}
		if config.ServiceTier != nil {
			fields["service_tier"] = *config.ServiceTier
		}
		if config.ReasoningEffort != nil {
			fields["reasoning_effort"] = *config.ReasoningEffort
		}
		if config.APIKeyEnv != nil {
			fields["api_key_env"] = *config.APIKeyEnv
		}
		if config.APIKeyRequired != nil {
			fields["api_key_required"] = *config.APIKeyRequired
		}
		if config.ExtraParams != nil {
			fields["extra_params"] = providerMapForMapping(config.ExtraParams)
		}
		definitions = append(definitions, fields)
	}
	return configkit.Mapping(label, map[string]any{"profiles": definitions})
}