/**
 * Event Store — Types
 */

export type SessionEventType =
	| "message"
	| "tool_start"
	| "tool_end"
	| "tool_error"
	| "assistant_start"
	| "assistant_end"
	| "session_start"
	| "session_end"
	| "checkpoint"
	| "compact";

export interface EventMetadata {
	model?: string;
	provider?: string;
	tokens?: number;
	durationMs?: number;
}

export interface SessionEvent {
	id: string;
	sessionId: string;
	timestamp: string;
	type: SessionEventType;
	role?: "user" | "assistant" | "system";
	content?: string;
	tool?: string;
	error?: string;
	metadata?: EventMetadata;
}

export interface StoreOptions {
	sessionsDir?: string;
}

export interface StoreStats {
	sessionId: string;
	totalEvents: number;
	sizeBytes: number;
	lastEventAt: string | null;
}

export interface WriteResult {
	id: string;
	timestamp: string;
	bytesWritten: number;
}

export interface ReadOptions {
	sessionId?: string;
	since?: string;
	types?: SessionEventType[];
	limit?: number;
	offset?: number;
}

export interface SearchOptions {
	sessionId?: string;
	query: string;
	limit?: number;
}