import type { SnapshotDiffResult } from "../../diff/snapshots.ts";
import { isProgress, type PiToolShell, type ToolContext } from "../../types.ts";
import { toolErrorLabel, toolExpandHint, toolFreshnessLabel } from "../tool-labels.ts";
import { toolProgressView } from "../tool-progress.ts";
import { toolStatus } from "../tool-status.ts";
import { muted as toolMuted, renderText as toolText } from "../tui.ts";
import type { RenderComponent, RenderTheme } from "../types.ts";
export function renderWebDiffResult(
	result: PiToolShell,
	expanded = false,
	theme?: RenderTheme,
): RenderComponent {
	const envelope = result.details as Partial<ToolContext<Partial<SnapshotDiffResult>>>;
	if (isProgress(envelope))
		return toolProgressView("web_scrape diff", envelope, theme, { allowIcons: false });
	const diff = envelope.data;
	const diffState = !diff?.previous
		? "saved baseline"
		: envelope.summary?.includes("No meaningful") || envelope.summary?.includes("No content")
			? "no content changes"
			: `changed: ${diff.diff?.changedCount ?? 0} changed, ${diff.diff?.addedCount ?? 0} added, ${diff.diff?.removedCount ?? 0} removed`;
	const title = envelope.error
		? toolErrorLabel("web_scrape", envelope.error, { allowIcons: false })
		: toolStatus([diffState, toolFreshnessLabel(envelope)], theme);
	if (!expanded)
		return toolText(toolStatus([title, toolMuted(toolExpandHint.text, theme)], theme), {
			padToWidth: true,
		});
	const lines = [title];
	if (diff)
		lines.push(
			"fetched current page",
			"loaded previous snapshot",
			"compared normalized content",
			"saved snapshot",
		);
	const preview = envelope.answerContext ?? result.content[0]?.text;
	if (preview) lines.push("", preview.slice(0, 500));
	if (envelope.responseId) lines.push("", toolMuted(`responseId: ${envelope.responseId}`, theme));
	return toolText(lines.join("\n"), { padToWidth: true });
}