"use client";

/**
 * LikeEmailToggle — settings control for aggregated "someone liked your post"
 * emails. Reads the current preference and lets the user opt out (push +
 * in-app like notifications are unaffected). Matches the other settings rows.
 */

import { useEffect, useState } from "react";
import { toast } from "sonner";
import { notifications } from "@/lib/social";

export function LikeEmailToggle() {
  const [enabled, setEnabled] = useState<boolean | null>(null);
  const [busy, setBusy] = useState(false);

  useEffect(() => {
    let cancelled = false;
    notifications
      .emailPrefs()
      .then((r) => {
        if (!cancelled) setEnabled(r.like_emails);
      })
      .catch(() => {
        if (!cancelled) setEnabled(true); // default-on; toggle still works
      });
    return () => {
      cancelled = true;
    };
  }, []);

  async function toggle() {
    if (enabled === null) return;
    const next = !enabled;
    setBusy(true);
    try {
      await notifications.setEmailPrefs(next);
      setEnabled(next);
      toast.success(next ? "Like emails turned on" : "Like emails turned off");
    } catch {
      toast.error("Could not update preference");
    } finally {
      setBusy(false);
    }
  }

  return (
    <ul className="divide-y divide-border">
      <li className="flex items-center justify-between gap-4 py-3">
        <div className="min-w-0">
          <span className="text-sm text-foreground">Like emails</span>
          <p className="text-xs text-muted-foreground mt-0.5">
            Get an email when someone likes your post (bundled — one email per
            post). Push and in-app notifications stay on either way.
          </p>
        </div>
        <div className="shrink-0">
          {enabled === null ? (
            <span className="text-xs text-muted-foreground">…</span>
          ) : (
            <button
              type="button"
              onClick={toggle}
              disabled={busy}
              aria-pressed={enabled}
              className={[
                "relative inline-flex h-6 w-11 items-center rounded-full transition-colors disabled:opacity-60",
                enabled ? "bg-primary" : "bg-muted-foreground/30",
              ].join(" ")}
            >
              <span
                className={[
                  "inline-block size-5 transform rounded-full bg-white shadow transition-transform",
                  enabled ? "translate-x-5" : "translate-x-0.5",
                ].join(" ")}
              />
            </button>
          )}
        </div>
      </li>
    </ul>
  );
}