contracts

type BatchEmbeddingProvider interface {
	EmbeddingProvider
	// CreateBatchEmbedding returns embeddings in the same order as the inputs.
	CreateBatchEmbedding(ctx context.Context, texts []string) (*BatchEmbeddingResult, error)
}

type BatchEmbeddingResult struct {
	Embeddings  [][]float64
	InputTokens int64
	TotalTokens int64
	Cost        float64
}

type Config struct {
	// DispatchConfig keeps construction identity separate from catalogue identity.
	DispatchConfig *latest.ModelConfig
	ModelConfig    latest.ModelConfig
	ModelOptions   options.ModelOptions
	Env            environment.Provider
	// RebuildProvider preserves the construction context needed to clone a provider.
	RebuildProvider RebuildProviderFunc
	// BaseURL is the resolved endpoint actually used by the provider, unlike
	// ModelConfig.BaseURL, which contains the user-supplied value.
	BaseURL string
}

type ConversationCompactor interface {
	Provider
	// CompactConversation compacts messages, the fully assembled prompt the
	// conversation model would receive (system messages included), with the
	// same request tools. instructions is optional user steering for the
	// summary. Returning a result with an empty Summary means nothing was
	// compacted and the caller leaves the transcript untouched.
	CompactConversation(ctx context.Context, messages []chat.Message, requestTools []tools.Tool, instructions string) (*chat.CompactionResult, error)
}

type EmbeddingProvider interface {
	Provider
	CreateEmbedding(ctx context.Context, text string) (*EmbeddingResult, error)
}

type EmbeddingResult struct {
	Embedding   []float64
	InputTokens int64
	TotalTokens int64
	Cost        float64
}

type Provider interface {
	// ID returns a provider-qualified identity to preserve the model namespace
	// when it crosses API boundaries.
	ID() modelsdev.ID
	// CreateChatCompletionStream creates a streaming chat completion request.
	CreateChatCompletionStream(
		ctx context.Context,
		messages []chat.Message,
		tools []tools.Tool,
	) (chat.MessageStream, error)
	// BaseConfig returns the provider's base configuration.
	BaseConfig() Config
}

type RebuildProviderFunc func(
	ctx context.Context,
	cfg *latest.ModelConfig,
	opts ...options.Opt,
) (Provider, error)

type RerankingProvider interface {
	Provider
	// Rerank returns one relevance score per document, in input order.
	Rerank(ctx context.Context, query string, documents []types.Document, criteria string) ([]float64, error)
}

type ServingModel struct {
	ID     modelsdev.ID
	Config Config
}

type ServingStream interface {
	chat.MessageStream
	ServingModel() ServingModel
}