import {	fromGeneratedExtEnvelope,	type LiveExtEnvelope,} from "./ext.js";import type * as protocol from "./generated-protocol.js";import {	ownershipMatchesSelector,	ownershipSelectorKey,	type LiveOwnershipScope,} from "./ownership.js";import {	fromGeneratedStreamChannel,	fromGeneratedVmLifecycleState,} from "./protocol-maps.js"; export const ANY_BUFFERED_EVENT_KEY = "*"; export type { LiveOwnershipScope } from "./ownership.js"; export type LiveSidecarEventPayload =	| {			type: "vm_lifecycle";			state: "creating" | "ready" | "disposing" | "disposed" | "failed";	  }	| {			type: "process_output";			process_id: string;			channel: "stdout" | "stderr";			chunk: Uint8Array;	  }	| {			type: "process_exited";			process_id: string;			exit_code: number;	  }	| {			type: "structured";			name: string;			detail: Record<string, string>;	  }	| {			type: "ext";			envelope: LiveExtEnvelope;	  }; export interface LiveSidecarEventFrame {	ownership: LiveOwnershipScope;	payload: LiveSidecarEventPayload;} export type LiveSidecarEventSelector =	| {			any: true;	  }	| {			type: "vm_lifecycle";			ownership?: LiveOwnershipScope;			state?: Extract<				LiveSidecarEventPayload,				{ type: "vm_lifecycle" }			>["state"];	  }	| {			type: "process_output";			ownership?: LiveOwnershipScope;			processId?: string;			channel?: Extract<				LiveSidecarEventPayload,				{ type: "process_output" }			>["channel"];	  }	| {			type: "process_exited";			ownership?: LiveOwnershipScope;			processId?: string;	  }	| {			type: "structured";			ownership?: LiveOwnershipScope;			name?: string;			detail?: Record<string, string>;	  }; export type LiveSidecarBufferedEventRecord<	TEvent extends LiveSidecarEventFrame,> = {	event: TEvent;	keys: readonly string[];}; export type LiveSidecarEventWaitMatcher<TEvent extends LiveSidecarEventFrame> =	{		matches: (event: TEvent) => boolean;		bufferKey: string | null;	}; export class SidecarEventBufferOverflow extends Error {	readonly capacity: number;	readonly bufferedEvents: number;	readonly eventType: LiveSidecarEventPayload["type"]; 	constructor(options: {		capacity: number;		bufferedEvents: number;		eventType: LiveSidecarEventPayload["type"];	}) {		super(			`sidecar event buffer overflow after ${options.bufferedEvents} queued events (capacity ${options.capacity}) while buffering ${options.eventType}`,		);		this.name = "SidecarEventBufferOverflow";		this.capacity = options.capacity;		this.bufferedEvents = options.bufferedEvents;		this.eventType = options.eventType;	}} export class SidecarEventBuffer<TEvent extends LiveSidecarEventFrame> {	private readonly bufferedEvents = new Map<		number,		LiveSidecarBufferedEventRecord<TEvent>	>();	private readonly bufferedEventQueues = new Map<string, Set<number>>();	private nextBufferedEventId = 1; 	constructor(private readonly capacity: number) {} 	get size(): number {		return this.bufferedEvents.size;	} 	buffer(event: TEvent): SidecarEventBufferOverflow | null {		if (this.bufferedEvents.size >= this.capacity) {			return new SidecarEventBufferOverflow({				capacity: this.capacity,				bufferedEvents: this.bufferedEvents.size,				eventType: event.payload.type,			});		}		const eventId = this.nextBufferedEventId++;		const keys = sidecarEventBufferKeys(event);		this.bufferedEvents.set(eventId, {			event,			keys,		});		for (const key of keys) {			const queue = this.bufferedEventQueues.get(key);			if (queue) {				queue.add(eventId);				continue;			}			this.bufferedEventQueues.set(key, new Set([eventId]));		}		return null;	} 	take(matcher: LiveSidecarEventWaitMatcher<TEvent>): TEvent | null {		if (matcher.bufferKey !== null) {			return this.takeFromKey(matcher.bufferKey);		}		const queue = this.bufferedEventQueues.get(ANY_BUFFERED_EVENT_KEY);		if (!queue) {			return null;		}		for (const eventId of queue) {			const record = this.bufferedEvents.get(eventId);			if (!record) {				continue;			}			if (!matcher.matches(record.event)) {				continue;			}			return this.remove(eventId);		}		return null;	} 	private takeFromKey(key: string): TEvent | null {		const queue = this.bufferedEventQueues.get(key);		if (!queue) {			return null;		}		for (const eventId of queue) {			const record = this.bufferedEvents.get(eventId);			if (!record) {				queue.delete(eventId);				continue;			}			return this.remove(eventId);		}		return null;	} 	private remove(eventId: number): TEvent | null {		const record = this.bufferedEvents.get(eventId);		if (!record) {			return null;		}		this.bufferedEvents.delete(eventId);		for (const key of record.keys) {			const queue = this.bufferedEventQueues.get(key);			if (!queue) {				continue;			}			queue.delete(eventId);			if (queue.size === 0) {				this.bufferedEventQueues.delete(key);			}		}		return record.event;	}} function buildBufferKey(	type: LiveSidecarEventPayload["type"],	options?: {		ownership?: LiveOwnershipScope;		state?: string;		processId?: string;		channel?: string;		name?: string;	},): string {	const parts = [`type:${type}`];	if (options?.ownership) {		parts.push(`ownership:${ownershipSelectorKey(options.ownership)}`);	}	if (options?.state) {		parts.push(`state:${options.state}`);	}	if (options?.processId) {		parts.push(`process:${options.processId}`);	}	if (options?.channel) {		parts.push(`channel:${options.channel}`);	}	if (options?.name) {		parts.push(`name:${options.name}`);	}	return parts.join("|");} export function sidecarSelectorMatchesEvent<TEvent extends LiveSidecarEventFrame>(	selector: LiveSidecarEventSelector,	event: TEvent,): boolean {	if ("any" in selector) {		return true;	}	if (event.payload.type !== selector.type) {		return false;	}	if (!ownershipMatchesSelector(selector.ownership, event.ownership)) {		return false;	}	switch (selector.type) {		case "vm_lifecycle": {			const payload = event.payload as Extract<				LiveSidecarEventPayload,				{ type: "vm_lifecycle" }			>;			return selector.state === undefined || payload.state === selector.state;		}		case "process_output": {			const payload = event.payload as Extract<				LiveSidecarEventPayload,				{ type: "process_output" }			>;			return (				(selector.processId === undefined ||					payload.process_id === selector.processId) &&				(selector.channel === undefined || payload.channel === selector.channel)			);		}		case "process_exited": {			const payload = event.payload as Extract<				LiveSidecarEventPayload,				{ type: "process_exited" }			>;			return (				selector.processId === undefined ||				payload.process_id === selector.processId			);		}		case "structured": {			const payload = event.payload as Extract<				LiveSidecarEventPayload,				{ type: "structured" }			>;			if (selector.name !== undefined && payload.name !== selector.name) {				return false;			}			if (!selector.detail) {				return true;			}			for (const [key, value] of Object.entries(selector.detail)) {				if (payload.detail[key] !== value) {					return false;				}			}			return true;		}	}} export function sidecarSelectorBufferKey(	selector: LiveSidecarEventSelector,): string | null {	if ("any" in selector) {		return ANY_BUFFERED_EVENT_KEY;	}	switch (selector.type) {		case "vm_lifecycle":			return buildBufferKey(selector.type, {				ownership: selector.ownership,				state: selector.state,			});		case "process_output":			return buildBufferKey(selector.type, {				ownership: selector.ownership,				processId: selector.processId,				channel: selector.channel,			});		case "process_exited":			return buildBufferKey(selector.type, {				ownership: selector.ownership,				processId: selector.processId,			});		case "structured":			if (selector.detail) {				return null;			}			return buildBufferKey(selector.type, {				ownership: selector.ownership,				name: selector.name,			});	}} export function normalizeSidecarEventMatcher<	TEvent extends LiveSidecarEventFrame,>(	selector: LiveSidecarEventSelector | ((event: TEvent) => boolean),): LiveSidecarEventWaitMatcher<TEvent> {	if (typeof selector === "function") {		return {			matches: selector,			bufferKey: null,		};	}	return {		matches: (event) => sidecarSelectorMatchesEvent(selector, event),		bufferKey: sidecarSelectorBufferKey(selector),	};} export function fromGeneratedEventPayload(	payload: protocol.EventPayload,): LiveSidecarEventPayload {	switch (payload.tag) {		case "VmLifecycleEvent":			return {				type: "vm_lifecycle",				state: fromGeneratedVmLifecycleState(payload.val.state),			};		case "ProcessOutputEvent":			return {				type: "process_output",				process_id: payload.val.processId,				channel: fromGeneratedStreamChannel(payload.val.channel),				chunk: Buffer.from(payload.val.chunk),			};		case "ProcessExitedEvent":			return {				type: "process_exited",				process_id: payload.val.processId,				exit_code: payload.val.exitCode,			};		case "StructuredEvent":			return {				type: "structured",				name: payload.val.name,				detail: Object.fromEntries(payload.val.detail),			};		case "ExtEnvelope":			return {				type: "ext",				envelope: fromGeneratedExtEnvelope(payload.val),		};	}} export function sidecarEventWaitAbortError(reason: unknown): Error {	return reason instanceof Error		? reason		: new Error(reason ? String(reason) : "sidecar event wait aborted");} export function sidecarEventBufferKeys<TEvent extends LiveSidecarEventFrame>(	event: TEvent,): string[] {	const owner = event.ownership;	const keys = new Set<string>([		ANY_BUFFERED_EVENT_KEY,		buildBufferKey(event.payload.type),		buildBufferKey(event.payload.type, { ownership: owner }),	]);	switch (event.payload.type) {		case "vm_lifecycle":			keys.add(				buildBufferKey(event.payload.type, {					state: event.payload.state,				}),			);			keys.add(				buildBufferKey(event.payload.type, {					ownership: owner,					state: event.payload.state,				}),			);			break;		case "process_output":			keys.add(				buildBufferKey(event.payload.type, {					processId: event.payload.process_id,				}),			);			keys.add(				buildBufferKey(event.payload.type, {					channel: event.payload.channel,				}),			);			keys.add(				buildBufferKey(event.payload.type, {					processId: event.payload.process_id,					channel: event.payload.channel,				}),			);			keys.add(				buildBufferKey(event.payload.type, {					ownership: owner,					processId: event.payload.process_id,				}),			);			keys.add(				buildBufferKey(event.payload.type, {					ownership: owner,					channel: event.payload.channel,				}),			);			keys.add(				buildBufferKey(event.payload.type, {					ownership: owner,					processId: event.payload.process_id,					channel: event.payload.channel,				}),			);			break;		case "process_exited":			keys.add(				buildBufferKey(event.payload.type, {					processId: event.payload.process_id,				}),			);			keys.add(				buildBufferKey(event.payload.type, {					ownership: owner,					processId: event.payload.process_id,				}),			);			break;		case "structured":			keys.add(				buildBufferKey(event.payload.type, {					name: event.payload.name,				}),			);			keys.add(				buildBufferKey(event.payload.type, {					ownership: owner,					name: event.payload.name,				}),			);			break;		case "ext":			break;	}	return [...keys];}