"use server";

import { revalidatePath } from "next/cache";
import type { ContentMutationSnapshot } from "@/features/housekeeping/domains/content/services/mutations";
import { createCorrelationId } from "@/features/housekeeping/foundation/contracts";
import { requirePermission, type StaffUser } from "@/lib/admin/guard";
import { PERMS } from "@/lib/permissions";

const MAX_SIZE = 2 * 1024 * 1024;
const ALLOWED = [
	"image/png",
	"image/jpeg",
	"image/gif",
	"image/webp",
	"image/x-icon",
	"image/svg+xml",
];

async function executeAuditedFaviconMutation(
	staff: StaffUser,
	operation: "favicon.save" | "favicon.delete",
	input: unknown,
): Promise<ContentMutationSnapshot> {
	const [
		{ contentProductionMutationAdapter },
		{ getHousekeepingCapabilityContext },
	] = await Promise.all([
		import(
			"@/features/housekeeping/domains/content/services/mutations-production"
		),
		import("@/features/housekeeping/foundation/server-capability-context"),
	]);
	const capability = await getHousekeepingCapabilityContext();
	if (capability.actor.id !== staff.id)
		throw new Error("Authenticated staff changed during favicon mutation");
	return contentProductionMutationAdapter.execute(operation, input, {
		capability,
		correlationId: createCorrelationId(),
		legacy: true,
	});
}

export async function saveFavicon(
	formData: FormData,
): Promise<{ success: boolean; url?: string; error?: string }> {
	const staff = await requirePermission(PERMS.SETTINGS_VIEW);
	try {
		const file = formData.get("file") as File | null;
		if (!file || file.size === 0)
			return { success: false, error: "No file provided" };
		if (file.size > MAX_SIZE)
			return { success: false, error: "File too large (max 2MB)" };
		if (!ALLOWED.includes(file.type))
			return {
				success: false,
				error: "Invalid file type. Allowed: PNG, JPEG, GIF, WebP, ICO, SVG",
			};
		const result = await executeAuditedFaviconMutation(staff, "favicon.save", {
			file,
		});
		siteRevalidate();
		return {
			success: true,
			...(typeof result.output?.url === "string"
				? { url: result.output.url }
				: {}),
		};
	} catch (error) {
		return {
			success: false,
			error: error instanceof Error ? error.message : "Unknown error",
		};
	}
}

export async function deleteFavicon(): Promise<{
	success: boolean;
	error?: string;
}> {
	const staff = await requirePermission(PERMS.SETTINGS_VIEW);
	try {
		await executeAuditedFaviconMutation(staff, "favicon.delete", {});
		siteRevalidate();
		return { success: true };
	} catch (error) {
		return {
			success: false,
			error: error instanceof Error ? error.message : "Unknown error",
		};
	}
}

function siteRevalidate(): void {
	revalidatePath("/", "layout");
	revalidatePath("/admin/favicon");
}