package llm

// Modelliert nach dem expliziteren Anthropic-Schema; der OpenAI-Adapter synthetisiert.

type Event interface{ isEvent() }

type BlockStart struct {
	Index int
	Block Block // Block ohne Inhalt, nur Kind/ID/Name
}

type BlockDelta struct {
	Index       int
	Text        string
	PartialJSON string
}

type BlockStop struct {
	Index int
}

type Done struct {
	Stop  StopReason
	Usage Usage
}

func (BlockStart) isEvent() {}
func (BlockDelta) isEvent() {}
func (BlockStop) isEvent()  {}
func (Done) isEvent()       {}

type StopReason string

const (
	StopEnd       StopReason = "end_turn"
	StopToolUse   StopReason = "tool_use"
	StopMaxTokens StopReason = "max_tokens"
)

type Usage struct {
	InputTokens      int `json:"input_tokens,omitempty"`
	OutputTokens     int `json:"output_tokens,omitempty"`
	CacheReadTokens  int `json:"cache_read_tokens,omitempty"`
	CacheWriteTokens int `json:"cache_write_tokens,omitempty"`
}