import type { AgentMessage } from "@f5-sales-demo/pi-agent-core";
import type { AssistantMessage, ImageContent, Message } from "@f5-sales-demo/pi-ai";
import { Spacer, Text, TruncatedText } from "@f5-sales-demo/pi-tui";
import { settings } from "../../config/settings";
import { createMarkdownMediaOptions } from "../../media/markdown-resolver";
import { AssistantMessageComponent } from "../../modes/components/assistant-message";
import { BashExecutionComponent } from "../../modes/components/bash-execution";
import { BranchSummaryMessageComponent } from "../../modes/components/branch-summary-message";
import { CompactionSummaryMessageComponent } from "../../modes/components/compaction-summary-message";
import { CustomMessageComponent } from "../../modes/components/custom-message";
import {
	createSystemGutter,
	createTextGutter,
	createToolGutter,
	GutterBlock,
} from "../../modes/components/gutter-block";
import { MediaMessageComponent } from "../../modes/components/media-message";
import { PythonExecutionComponent } from "../../modes/components/python-execution";
import { ReadToolGroupComponent } from "../../modes/components/read-tool-group";
import { SkillMessageComponent } from "../../modes/components/skill-message";
import { ToolExecutionComponent } from "../../modes/components/tool-execution";
import { UserMessageComponent } from "../../modes/components/user-message";
import { theme } from "../../modes/theme/theme";
import type { CompactionQueuedMessage, InteractiveModeContext } from "../../modes/types";
import { ReadGroupOutcomeAggregator } from "../../modes/utils/read-group-outcome-aggregator";
import { type CustomMessage, SKILL_PROMPT_MESSAGE_TYPE, type SkillPromptDetails } from "../../session/messages";
import type { SessionContext } from "../../session/session-manager";
import { formatBytes, formatDuration } from "../../tools/render-utils";

type TextBlock = { type: "text"; text: string };

type QueuedMessages = {
	steering: string[];
	followUp: string[];
};

export class UiHelpers {
	constructor(private ctx: InteractiveModeContext) {}

	/** Extract text content from a user message */
	getUserMessageText(message: Message): string {
		if (message.role !== "user") return "";
		const textBlocks =
			typeof message.content === "string"
				? [{ type: "text", text: message.content }]
				: message.content.filter((content): content is TextBlock => content.type === "text");
		return textBlocks.map(block => block.text).join("");
	}

	/**
	 * Show a status message in the chat.
	 *
	 * If multiple status messages are emitted back-to-back (without anything else being added to the chat),
	 * we update the previous status line instead of appending new ones to avoid log spam.
	 */
	showStatus(message: string, options?: { dim?: boolean }): void {
		if (this.ctx.isBackgrounded) {
			return;
		}
		const children = this.ctx.chatContainer.children;
		const last = children.length > 0 ? children[children.length - 1] : undefined;
		const secondLast = children.length > 1 ? children[children.length - 2] : undefined;
		const useDim = options?.dim ?? true;
		const rendered = useDim ? theme.fg("dim", message) : message;

		if (last && secondLast && last === this.ctx.lastStatusText && secondLast === this.ctx.lastStatusSpacer) {
			this.ctx.lastStatusText.setText(rendered);
			this.ctx.ui.requestRender();
			return;
		}

		const spacer = new Spacer(1);
		const text = new Text(rendered, 1, 0);
		this.ctx.chatContainer.addChild(spacer);
		this.ctx.chatContainer.addChild(text);
		this.ctx.lastStatusSpacer = spacer;
		this.ctx.lastStatusText = text;
		this.ctx.ui.requestRender();
	}

	addMessageToChat(message: AgentMessage, options?: { populateHistory?: boolean }): void {
		switch (message.role) {
			case "bashExecution": {
				const component = new BashExecutionComponent(message.command, this.ctx.ui, message.excludeFromContext);
				if (message.output) {
					component.appendOutput(message.output);
				}
				component.setComplete(message.exitCode, message.cancelled, {
					truncation: message.meta?.truncation,
				});
				const gutter = createToolGutter(this.ctx.ui, component);
				gutter.setDone(component.outcome);
				this.ctx.chatContainer.addChild(gutter);
				break;
			}
			case "pythonExecution": {
				const component = new PythonExecutionComponent(message.code, this.ctx.ui, message.excludeFromContext);
				if (message.output) {
					component.appendOutput(message.output);
				}
				component.setComplete(message.exitCode, message.cancelled, {
					truncation: message.meta?.truncation,
				});
				const gutter = createToolGutter(this.ctx.ui, component);
				gutter.setDone(component.outcome);
				this.ctx.chatContainer.addChild(gutter);
				break;
			}
			case "hookMessage":
			case "custom": {
				if (message.display) {
					if (message.customType === "async-result") {
						const details = (
							message as CustomMessage<{
								jobId?: string;
								type?: "bash" | "task";
								label?: string;
								durationMs?: number;
							}>
						).details;
						const jobId = details?.jobId ?? "unknown";
						const typeLabel = details?.type ? `[${details.type}]` : "[job]";
						const duration =
							typeof details?.durationMs === "number" ? formatDuration(details.durationMs) : undefined;
						const line = [
							theme.fg("success", `${theme.status.success} Background job completed`),
							theme.fg("dim", typeLabel),
							theme.fg("contentAccent", jobId),
							duration ? theme.fg("dim", `(${duration})`) : undefined,
						]
							.filter(Boolean)
							.join(" ");
						this.ctx.chatContainer.addChild(createSystemGutter(this.ctx.ui, new Text(line, 1, 0)));
						break;
					}
					if (message.customType === SKILL_PROMPT_MESSAGE_TYPE) {
						const component = new SkillMessageComponent(message as CustomMessage<SkillPromptDetails>);
						component.setExpanded(this.ctx.toolOutputExpanded);
						this.ctx.chatContainer.addChild(createTextGutter(this.ctx.ui, component));
						break;
					}
					const renderer = this.ctx.session.extensionRunner?.getMessageRenderer(message.customType);
					// Both HookMessage and CustomMessage have the same structure, cast for compatibility
					const component = new CustomMessageComponent(message as CustomMessage<unknown>, renderer);
					component.setExpanded(this.ctx.toolOutputExpanded);
					this.ctx.chatContainer.addChild(createTextGutter(this.ctx.ui, component));
				}
				break;
			}
			case "compactionSummary": {
				this.ctx.chatContainer.addChild(new Spacer(1));
				const component = new CompactionSummaryMessageComponent(message);
				component.setExpanded(this.ctx.toolOutputExpanded);
				this.ctx.chatContainer.addChild(createSystemGutter(this.ctx.ui, component));
				break;
			}
			case "branchSummary": {
				this.ctx.chatContainer.addChild(new Spacer(1));
				const component = new BranchSummaryMessageComponent(message);
				component.setExpanded(this.ctx.toolOutputExpanded);
				this.ctx.chatContainer.addChild(createSystemGutter(this.ctx.ui, component));
				break;
			}
			case "fileMention": {
				// Render compact file mention display
				for (const file of message.files) {
					let suffix: string;
					if (file.skippedReason === "tooLarge") {
						const size = typeof file.byteSize === "number" ? formatBytes(file.byteSize) : "unknown size";
						suffix = `(skipped: ${size})`;
					} else {
						suffix = file.image
							? "(image)"
							: file.lineCount === undefined
								? "(unknown lines)"
								: `(${file.lineCount} lines)`;
					}
					const text = `${theme.fg("dim", `${theme.tree.last} `)}${theme.fg("muted", "Read")} ${theme.fg(
						"chromeAccent",
						file.path,
					)} ${theme.fg("dim", suffix)}`;
					this.ctx.chatContainer.addChild(createTextGutter(this.ctx.ui, new Text(text, 0, 0)));
				}
				break;
			}
			case "user":
			case "developer": {
				const textContent = this.ctx.getUserMessageText(message);
				if (textContent) {
					const isSynthetic = message.role === "developer" ? true : (message.synthetic ?? false);
					const userComponent = new UserMessageComponent(textContent, isSynthetic);
					this.ctx.chatContainer.addChild(userComponent);
					if (options?.populateHistory && message.role === "user" && !isSynthetic) {
						this.ctx.editor.addToHistory(textContent);
					}
				}
				break;
			}
			case "assistant": {
				const assistantComponent = new AssistantMessageComponent(
					message,
					this.ctx.hideThinkingBlock,
					createMarkdownMediaOptions(this.ctx.sessionManager, () => this.ctx.ui.requestRender()),
				);
				this.ctx.chatContainer.addChild(createTextGutter(this.ctx.ui, assistantComponent));
				break;
			}
			case "media": {
				const component = new MediaMessageComponent(message, this.ctx.sessionManager.getBlobStore(), this.ctx.ui, {
					autoplay: this.ctx.session.settings.get("media.autoplay"),
					reducedMotion: this.ctx.session.settings.get("media.reducedMotion"),
					fpsCap: this.ctx.session.settings.get("media.fpsCap"),
				});
				this.ctx.chatContainer.addChild(createTextGutter(this.ctx.ui, component));
				break;
			}
			case "toolResult": {
				// Tool results are rendered inline with tool calls, handled separately
				break;
			}
			default: {
				const _exhaustive: never = message;
			}
		}
	}

	/**
	 * Render session context to chat. Used for initial load and rebuild after compaction.
	 * @param sessionContext Session context to render
	 * @param options.updateFooter Update footer state
	 * @param options.populateHistory Add user messages to editor history
	 */
	renderSessionContext(
		sessionContext: SessionContext,
		options: { updateFooter?: boolean; populateHistory?: boolean } = {},
	): void {
		this.ctx.optimisticUserMessageSignature = undefined;
		this.ctx.pendingTools.clear();

		if (options.updateFooter) {
			this.ctx.statusLine.invalidate();
			this.ctx.updateEditorBorderColor();
		}

		let readGroup: ReadToolGroupComponent | null = null;
		// Parallel to `readGroup`: the wrapping gutter for the current read
		// group. Held so the aggregator can finalize the correct gutter at
		// each group boundary.
		let readGroupGutter: ReturnType<typeof createToolGutter> | null = null;
		// IDs of reads added to the current group but not yet matched to a
		// toolResult. Any still-pending read at group boundary counts as an
		// "error" outcome for the group, matching the live
		// `agent_end`-time error coloring of orphaned tools.
		let unmatchedReadsInGroup = new Set<string>();
		const readGroupAggregator = new ReadGroupOutcomeAggregator();
		const finalizeReadGroup = (): void => {
			if (readGroupGutter) {
				// Any read in this group that never received a toolResult
				// is an orphan → record error so the group aggregates to
				// "error" instead of silently ending on the last success.
				for (const _id of unmatchedReadsInGroup) {
					readGroupAggregator.record(readGroupGutter, "error");
				}
				readGroupAggregator.finalize(readGroupGutter);
			}
			readGroup = null;
			readGroupGutter = null;
			unmatchedReadsInGroup = new Set<string>();
		};
		const readToolCallArgs = new Map<string, Record<string, unknown>>();
		const readToolCallAssistantComponents = new Map<string, AssistantMessageComponent>();
		const toolGutters = new Map<string, ReturnType<typeof createToolGutter>>();
		const deferredMessages: AgentMessage[] = [];
		for (const message of sessionContext.messages) {
			// Defer compaction summaries so they render at the bottom (visible after scroll)
			if (message.role === "compactionSummary") {
				deferredMessages.push(message);
				continue;
			}
			// Assistant messages need special handling for tool calls
			if (message.role === "assistant") {
				this.ctx.addMessageToChat(message);
				const lastChild = this.ctx.chatContainer.children[this.ctx.chatContainer.children.length - 1];
				const unwrapped = lastChild instanceof GutterBlock ? lastChild.child : lastChild;
				const assistantComponent = unwrapped instanceof AssistantMessageComponent ? unwrapped : undefined;
				if (assistantComponent) {
					assistantComponent.setUsageInfo(message.usage);
				}
				// New assistant message — finalize the previous group so its
				// gutter resolves with the worst outcome seen so far.
				finalizeReadGroup();
				const hasErrorStop = message.stopReason === "aborted" || message.stopReason === "error";
				const errorMessage = hasErrorStop
					? message.stopReason === "aborted"
						? (() => {
								const retryAttempt = this.ctx.session.retryAttempt;
								return retryAttempt > 0
									? `Aborted after ${retryAttempt} retry attempt${retryAttempt > 1 ? "s" : ""}`
									: "Operation aborted";
							})()
						: message.errorMessage || "Error"
					: null;

				// Render tool call components
				for (const content of message.content) {
					if (content.type !== "toolCall") {
						continue;
					}

					if (content.name === "read") {
						if (hasErrorStop && errorMessage) {
							if (!readGroup) {
								readGroup = new ReadToolGroupComponent();
								readGroup.setExpanded(this.ctx.toolOutputExpanded);
								readGroupGutter = createToolGutter(this.ctx.ui, readGroup);
								this.ctx.chatContainer.addChild(new Spacer(1));
								this.ctx.chatContainer.addChild(readGroupGutter);
							}
							if (readGroupGutter) {
								readGroupAggregator.record(readGroupGutter, "error");
							}
							// error-stop path injects an immediate error
							// result, so the read is NOT unmatched.
							unmatchedReadsInGroup.delete(content.id);
							readGroup.updateArgs(content.arguments, content.id);
							readGroup.updateResult(
								{ content: [{ type: "text", text: errorMessage }], isError: true },
								false,
								content.id,
							);
						} else {
							const normalizedArgs =
								content.arguments && typeof content.arguments === "object" && !Array.isArray(content.arguments)
									? (content.arguments as Record<string, unknown>)
									: {};
							readToolCallArgs.set(content.id, normalizedArgs);
							if (assistantComponent) {
								readToolCallAssistantComponents.set(content.id, assistantComponent);
							}
							// Track this read as part of the current group.
							// A matching toolResult will remove it; anything
							// left at group boundary is an unmatched orphan
							// and counts as an error for the aggregator.
							unmatchedReadsInGroup.add(content.id);
						}
						continue;
					}

					// Non-read tool call breaks the group.
					finalizeReadGroup();
					if (content.name === "todo_write" && !settings.get("todo.verbose")) {
						continue;
					}
					const tool = this.ctx.session.getToolByName(content.name);
					const renderArgs =
						"partialJson" in content
							? { ...content.arguments, __partialJson: content.partialJson }
							: content.arguments;
					const component = new ToolExecutionComponent(
						content.name,
						renderArgs,
						{
							showImages: settings.get("terminal.showImages"),
							editFuzzyThreshold: settings.get("edit.fuzzyThreshold"),
							editAllowFuzzy: settings.get("edit.fuzzyMatch"),
						},
						tool,
						this.ctx.ui,
						this.ctx.sessionManager.getCwd(),
						content.id,
					);
					component.setExpanded(this.ctx.toolOutputExpanded);
					const toolGutter = createToolGutter(this.ctx.ui, component);
					this.ctx.chatContainer.addChild(new Spacer(1));
					this.ctx.chatContainer.addChild(toolGutter);

					if (hasErrorStop && errorMessage) {
						component.updateResult(
							{ content: [{ type: "text", text: errorMessage }], isError: true },
							false,
							content.id,
						);
						toolGutter.setDone("error");
					} else {
						// Tool result hasn't arrived yet — keep gutter active until completion
						this.ctx.pendingTools.set(content.id, component);
						toolGutters.set(content.id, toolGutter);
					}
				}
			} else if (message.role === "toolResult") {
				if (message.toolName === "read") {
					const assistantComponent = readToolCallAssistantComponents.get(message.toolCallId);
					const images: ImageContent[] = message.content.filter(
						(content): content is ImageContent => content.type === "image",
					);
					if (images.length > 0 && assistantComponent && settings.get("terminal.showImages")) {
						assistantComponent.setToolResultImages(message.toolCallId, images);
						const hasText = message.content.some(c => c.type === "text");
						if (!hasText) {
							// Image-only reads are still successful reads —
							// record them into the current group aggregate
							// and remove from unmatched tracking so the
							// group does not wrongly aggregate to "error"
							// on a subsequent boundary.
							if (readGroupGutter) {
								readGroupAggregator.record(readGroupGutter, message.isError ? "error" : "success");
							}
							unmatchedReadsInGroup.delete(message.toolCallId);
							readToolCallArgs.delete(message.toolCallId);
							readToolCallAssistantComponents.delete(message.toolCallId);
							continue;
						}
					}
					const readOutcome: "success" | "error" = message.isError ? "error" : "success";
					let component = this.ctx.pendingTools.get(message.toolCallId);
					if (!component) {
						if (!readGroup) {
							readGroup = new ReadToolGroupComponent();
							readGroup.setExpanded(this.ctx.toolOutputExpanded);
							readGroupGutter = createToolGutter(this.ctx.ui, readGroup);
							this.ctx.chatContainer.addChild(new Spacer(1));
							this.ctx.chatContainer.addChild(readGroupGutter);
						}
						const args = readToolCallArgs.get(message.toolCallId);
						if (args) {
							readGroup.updateArgs(args, message.toolCallId);
						}
						component = readGroup;
						this.ctx.pendingTools.set(message.toolCallId, readGroup);
					}
					if (readGroupGutter) {
						readGroupAggregator.record(readGroupGutter, readOutcome);
					}
					// This read now has a matching result — it is no longer
					// an unmatched orphan for the group's aggregation.
					unmatchedReadsInGroup.delete(message.toolCallId);
					component.updateResult(message, false, message.toolCallId);
					this.ctx.pendingTools.delete(message.toolCallId);
					toolGutters.get(message.toolCallId)?.setDone(readOutcome);
					toolGutters.delete(message.toolCallId);
					readToolCallArgs.delete(message.toolCallId);
					readToolCallAssistantComponents.delete(message.toolCallId);
					continue;
				}

				// Match tool results to pending tool components.
				//
				// Persisted async-running results (details.async.state ===
				// "running") describe jobs that were active when the
				// session was saved — the persisted outcome is neither
				// success nor failure, just "incomplete". Finalize the
				// gutter with the neutral (dim) done color so rebuilt
				// transcripts don't misreport them as successful. True
				// resumption of such a job across sessions would require
				// handing the gutter to the live EventController's
				// private #pendingGutters map — out of scope for this
				// rebuild.
				const component = this.ctx.pendingTools.get(message.toolCallId);
				if (component) {
					const asyncState = (message.details as { async?: { state?: string } } | undefined)?.async?.state;
					const isAsyncRunning = asyncState === "running";
					component.updateResult(message, false, message.toolCallId);
					this.ctx.pendingTools.delete(message.toolCallId);
					const gutter = toolGutters.get(message.toolCallId);
					if (gutter) {
						if (isAsyncRunning) {
							// Neutral "completed state" color — not
							// success and not error.
							gutter.setDone();
						} else {
							gutter.setDone(message.isError ? "error" : "success");
						}
					}
					toolGutters.delete(message.toolCallId);
				}
			} else {
				// All other messages use standard rendering
				this.ctx.addMessageToChat(message, options);
			}
		}

		// Render deferred messages (compaction summaries) at the bottom so they're visible
		for (const message of deferredMessages) {
			this.ctx.addMessageToChat(message, options);
		}

		// Finalize any still-open read group at the tail of the transcript.
		// This also records "error" for any reads in the final group that
		// never received a toolResult, so incomplete groups aggregate to
		// error rather than silently closing on the last success.
		finalizeReadGroup();
		// Tool gutters without a matching result mean the session was
		// persisted with an unfinished tool — an aborted/errored turn.
		// Inject an error body so the component renders as failed (it has
		// no prior streamed content during a rebuild), and mark the
		// gutter error.
		for (const [toolCallId, gutter] of toolGutters.entries()) {
			const component = this.ctx.pendingTools.get(toolCallId);
			component?.updateResult(
				{ content: [{ type: "text", text: "Tool call did not complete" }], isError: true },
				false,
				toolCallId,
			);
			this.ctx.pendingTools.delete(toolCallId);
			gutter.setDone("error");
		}
		toolGutters.clear();
		this.ctx.ui.requestRender();
	}

	renderInitialMessages(): void {
		// This path is used to rebuild the visible chat transcript (e.g. after custom/debug UI).
		// Clear existing rendered chat first to avoid duplicating the full session in the container.
		this.ctx.chatContainer.clear();
		this.ctx.pendingMessagesContainer.clear();
		this.ctx.pendingBashComponents = [];
		this.ctx.pendingPythonComponents = [];

		// Get aligned messages and entries from session context
		const context = this.ctx.sessionManager.buildSessionContext();
		this.ctx.renderSessionContext(context, {
			updateFooter: true,
			populateHistory: true,
		});

		// Show compaction info if session was compacted
		const allEntries = this.ctx.sessionManager.getEntries();
		let compactionCount = 0;
		for (const entry of allEntries) {
			if (entry.type === "compaction") {
				compactionCount++;
			}
		}
		if (compactionCount > 0) {
			const times = compactionCount === 1 ? "1 time" : `${compactionCount} times`;
			this.ctx.showStatus(`Session compacted ${times}`);
		}
	}

	clearEditor(): void {
		if (this.ctx.isBackgrounded) {
			return;
		}
		this.ctx.editor.setText("");
		this.ctx.pendingImages = [];
		this.ctx.ui.requestRender();
	}

	showError(errorMessage: string): void {
		if (this.ctx.isBackgrounded) {
			process.stderr.write(`Error: ${errorMessage}\n`);
			return;
		}
		this.ctx.chatContainer.addChild(new Spacer(1));
		this.ctx.chatContainer.addChild(new Text(theme.fg("error", `Error: ${errorMessage}`), 1, 0));
		this.ctx.ui.requestRender();
	}

	showWarning(warningMessage: string): void {
		if (this.ctx.isBackgrounded) {
			process.stderr.write(`Warning: ${warningMessage}\n`);
			return;
		}
		this.ctx.chatContainer.addChild(new Spacer(1));
		this.ctx.chatContainer.addChild(new Text(theme.fg("warning", `Warning: ${warningMessage}`), 1, 0));
		this.ctx.ui.requestRender();
	}

	updatePendingMessagesDisplay(): void {
		this.ctx.pendingMessagesContainer.clear();
		const queuedMessages = this.ctx.session.getQueuedMessages() as QueuedMessages;

		const steeringMessages: Array<{ message: string; label: string }> = [];
		for (const message of queuedMessages.steering) {
			steeringMessages.push({ message, label: "Steer" });
		}
		for (const entry of this.ctx.compactionQueuedMessages as CompactionQueuedMessage[]) {
			if (entry.mode === "steer") {
				steeringMessages.push({ message: entry.text, label: "Steer" });
			}
		}

		const followUpMessages: Array<{ message: string; label: string }> = [];
		for (const message of queuedMessages.followUp) {
			followUpMessages.push({ message, label: "Follow-up" });
		}
		for (const entry of this.ctx.compactionQueuedMessages as CompactionQueuedMessage[]) {
			if (entry.mode === "followUp") {
				followUpMessages.push({ message: entry.text, label: "Follow-up" });
			}
		}

		const allMessages = [...steeringMessages, ...followUpMessages];
		if (allMessages.length > 0) {
			this.ctx.pendingMessagesContainer.addChild(new Spacer(1));
			for (const entry of allMessages) {
				const queuedText = theme.fg("dim", `${entry.label}: ${entry.message}`);
				this.ctx.pendingMessagesContainer.addChild(new TruncatedText(queuedText, 1, 0));
			}
			const dequeueKey = this.ctx.keybindings.getDisplayString("app.message.dequeue") || "Alt+Up";
			const hintText = theme.fg("dim", `${theme.tree.hook} ${dequeueKey} to edit`);
			this.ctx.pendingMessagesContainer.addChild(new TruncatedText(hintText, 1, 0));
		}
	}

	queueCompactionMessage(text: string, mode: "steer" | "followUp"): void {
		this.ctx.compactionQueuedMessages.push({ text, mode } as CompactionQueuedMessage);
		this.ctx.editor.addToHistory(text);
		this.ctx.editor.setText("");
		this.ctx.updatePendingMessagesDisplay();
		this.ctx.showStatus("Queued message for after compaction");
	}

	isKnownSlashCommand(text: string): boolean {
		if (!text.startsWith("/")) return false;
		const spaceIndex = text.indexOf(" ");
		const commandName = spaceIndex === -1 ? text.slice(1) : text.slice(1, spaceIndex);
		if (!commandName) return false;

		if (this.ctx.session.extensionRunner?.getCommand(commandName)) {
			return true;
		}

		for (const command of this.ctx.session.customCommands) {
			if (command.command.name === commandName) {
				return true;
			}
		}

		return this.ctx.fileSlashCommands.has(commandName);
	}

	async flushCompactionQueue(options?: { willRetry?: boolean }): Promise<void> {
		if (this.ctx.compactionQueuedMessages.length === 0) {
			return;
		}

		const queuedMessages = [...(this.ctx.compactionQueuedMessages as CompactionQueuedMessage[])];
		this.ctx.compactionQueuedMessages = [] as CompactionQueuedMessage[];
		this.ctx.updatePendingMessagesDisplay();

		const restoreQueue = (error: unknown) => {
			this.ctx.session.clearQueue();
			this.ctx.compactionQueuedMessages = queuedMessages;
			this.ctx.updatePendingMessagesDisplay();
			this.ctx.showError(
				`Failed to send queued message${queuedMessages.length > 1 ? "s" : ""}: ${
					error instanceof Error ? error.message : String(error)
				}`,
			);
		};

		try {
			if (options?.willRetry) {
				for (const message of queuedMessages) {
					if (this.ctx.isKnownSlashCommand(message.text)) {
						await this.ctx.session.prompt(message.text);
					} else if (message.mode === "followUp") {
						await this.ctx.session.followUp(message.text);
					} else {
						await this.ctx.session.steer(message.text);
					}
				}
				this.ctx.updatePendingMessagesDisplay();
				return;
			}

			let firstPromptIndex = -1;
			for (let i = 0; i < queuedMessages.length; i++) {
				if (!this.ctx.isKnownSlashCommand(queuedMessages[i].text)) {
					firstPromptIndex = i;
					break;
				}
			}
			if (firstPromptIndex === -1) {
				for (const message of queuedMessages) {
					await this.ctx.session.prompt(message.text);
				}
				return;
			}

			const preCommands = queuedMessages.slice(0, firstPromptIndex);
			const firstPrompt = queuedMessages[firstPromptIndex];
			const rest = queuedMessages.slice(firstPromptIndex + 1);

			for (const message of preCommands) {
				await this.ctx.session.prompt(message.text);
			}

			const promptPromise = this.ctx.session.prompt(firstPrompt.text).catch((error: unknown) => {
				restoreQueue(error);
			});

			for (const message of rest) {
				if (this.ctx.isKnownSlashCommand(message.text)) {
					await this.ctx.session.prompt(message.text);
				} else if (message.mode === "followUp") {
					await this.ctx.session.followUp(message.text);
				} else {
					await this.ctx.session.steer(message.text);
				}
			}
			this.ctx.updatePendingMessagesDisplay();
			void promptPromise;
		} catch (error) {
			restoreQueue(error);
		}
	}

	/** Move pending bash components from pending area to chat.
	 *  These commands have already completed (handleBashCommand/handlePythonCommand await execution)
	 *  so the gutter is immediately set to done. */
	flushPendingBashComponents(): void {
		for (const component of this.ctx.pendingBashComponents) {
			this.ctx.pendingMessagesContainer.removeChild(component);
			const gutter = createToolGutter(this.ctx.ui, component);
			gutter.setDone(component.outcome);
			this.ctx.chatContainer.addChild(gutter);
		}
		this.ctx.pendingBashComponents = [];
		for (const component of this.ctx.pendingPythonComponents) {
			this.ctx.pendingMessagesContainer.removeChild(component);
			const gutter = createToolGutter(this.ctx.ui, component);
			gutter.setDone(component.outcome);
			this.ctx.chatContainer.addChild(gutter);
		}
		this.ctx.pendingPythonComponents = [];
	}

	findLastAssistantMessage(): AssistantMessage | undefined {
		for (let i = this.ctx.session.messages.length - 1; i >= 0; i--) {
			const message = this.ctx.session.messages[i];
			if (message?.role === "assistant") {
				return message as AssistantMessage;
			}
		}
		return undefined;
	}

	extractAssistantText(message: AssistantMessage): string {
		let text = "";
		for (const content of message.content) {
			if (content.type === "text") {
				text += content.text;
			}
		}
		return text.trim();
	}
}