"use server";

import { randomUUID } from "node:crypto";
import { appSettings, events } from "@minecraft-account-manager/database";
import { getClientIp } from "@minecraft-account-manager/network";
import { eq } from "drizzle-orm";
import { headers } from "next/headers";
import { redirect } from "next/navigation";
import { parseAdmissionMessages } from "@/lib/admission-settings";
import { requireAdminSession } from "@/lib/auth/require-admin";
import { db } from "@/lib/database";

export async function saveAdmissionSettings(formData: FormData) {
  const admin = await requireAdminSession();
  const messages = parseAdmissionMessages(formData);
  if (!messages) redirect("/admin/settings?error=invalid-message");

  const requestHeaders = await headers();
  const ipAddress = getClientIp(requestHeaders, process.env.TRUST_PROXY === "true");
  await db.transaction(async (tx) => {
    const [previous] = await tx.select().from(appSettings).where(eq(appSettings.id, "default")).limit(1);
    const changedFields = (Object.keys(messages) as Array<keyof typeof messages>)
      .filter((field) => previous?.[field] !== messages[field]);
    await tx.insert(appSettings)
      .values({ id: "default", ...messages })
      .onConflictDoUpdate({
        target: appSettings.id,
        set: { ...messages, updatedAt: new Date() },
      });
    if (changedFields.length) {
      await tx.insert(events).values({
        id: randomUUID(),
        source: "/web/admin",
        type: "games.minecraft.account-manager.settings.admission-messages-updated",
        subject: "settings/default",
        time: new Date(),
        data: { changedFields, adminEmail: admin.email, adminName: admin.name },
        ipAddress: ipAddress ?? null,
      });
    }
  });

  redirect("/admin/settings?saved=1");
}