package api

import (
	"context"
)

type ReplyCallback func(Message)

type Chunk struct {
	Content    string
	TokenCount uint
}

type RequestParameters struct {
	Model string

	MaxTokens   int
	Temperature float32
	TopP        float32

	Toolbox []ToolSpec
}

type ChatCompletionProvider interface {
	// CreateChatCompletion requests a response to the provided messages.
	// Replies are appended to the given replies struct, and the
	// complete user-facing response is returned as a string.
	CreateChatCompletion(
		ctx context.Context,
		params RequestParameters,
		messages []Message,
	) (*Message, error)

	// Like CreateChageCompletion, except the response is streamed via
	// the output channel as it's received.
	CreateChatCompletionStream(
		ctx context.Context,
		params RequestParameters,
		messages []Message,
		chunks chan<- Chunk,
	) (*Message, error)
}

func IsAssistantContinuation(messages []Message) bool {
	if len(messages) == 0 {
		return false
	}
	return messages[len(messages)-1].Role == MessageRoleAssistant
}