async function generateMessages()

in scripts/populate.ts [47:147]
95 lines of code
21 McCabe index (conditional complexity)

async function generateMessages(preprompt?: string): Promise<Message[]> {
	const isLinear = faker.datatype.boolean(0.5);
	const isInterrupted = faker.datatype.boolean(0.05);

	const messages: Message[] = [];

	messages.push({
		id: crypto.randomUUID(),
		from: "system",
		content: preprompt ?? "",
		createdAt: faker.date.recent({ days: 30 }),
		updatedAt: faker.date.recent({ days: 30 }),
	});

	let isUser = true;
	let lastId = messages[0].id;
	if (isLinear) {
		const convLength = faker.number.int({ min: 1, max: 25 }) * 2; // must always be even

		for (let i = 0; i < convLength; i++) {
			const hasReasoning = Math.random() < 0.2;
			lastId = addChildren(
				{
					messages,
					rootMessageId: messages[0].id,
				},
				{
					from: isUser ? "user" : "assistant",
					content:
						faker.lorem.sentence({
							min: 10,
							max: isUser ? 50 : 200,
						}) +
						(!isUser && Math.random() < 0.1
							? "\n```\n" + faker.helpers.arrayElement(samples) + "\n```\n"
							: ""),
					createdAt: faker.date.recent({ days: 30 }),
					updatedAt: faker.date.recent({ days: 30 }),
					reasoning: hasReasoning ? faker.lorem.paragraphs(2) : undefined,
					updates: hasReasoning
						? [
								{
									type: MessageUpdateType.Reasoning,
									subtype: MessageReasoningUpdateType.Status,
									uuid: crypto.randomUUID(),
									status: "thinking",
								},
							]
						: [],
					interrupted: !isUser && i === convLength - 1 && isInterrupted,
				},
				lastId
			);
			isUser = !isUser;
		}
	} else {
		const convLength = faker.number.int({ min: 2, max: 200 });

		for (let i = 0; i < convLength; i++) {
			const hasReasoning = Math.random() < 0.2;
			addChildren(
				{
					messages,
					rootMessageId: messages[0].id,
				},
				{
					from: isUser ? "user" : "assistant",
					content:
						faker.lorem.sentence({
							min: 10,
							max: isUser ? 50 : 200,
						}) +
						(!isUser && Math.random() < 0.1
							? "\n```\n" + faker.helpers.arrayElement(samples) + "\n```\n"
							: ""),
					reasoning: hasReasoning ? faker.lorem.paragraphs(2) : undefined,
					updates: hasReasoning
						? [
								{
									type: MessageUpdateType.Reasoning,
									subtype: MessageReasoningUpdateType.Status,
									uuid: crypto.randomUUID(),
									status: "thinking",
								},
							]
						: [],
					createdAt: faker.date.recent({ days: 30 }),
					updatedAt: faker.date.recent({ days: 30 }),
					interrupted: !isUser && i === convLength - 1 && isInterrupted,
				},
				faker.helpers.arrayElement([
					messages[0].id,
					...messages.filter((m) => m.from === (isUser ? "assistant" : "user")).map((m) => m.id),
				])
			);

			isUser = !isUser;
		}
	}
	return messages;
}