"use client";

/**
 * /settings/feedbacks — the signed-in user's own feedback history.
 *
 * Lists every submission they've made (newest first) with its current
 * status — Submitted → Acknowledged → Resolved — and, when the team has
 * written back, the response inline. Read-only: submitting new feedback
 * still happens on /feedback.
 *
 * Anonymous visitors are prompted to sign in and bounced home if they
 * dismiss, mirroring /settings/profile — the underlying endpoint is
 * auth-only.
 */

import { useCallback, useEffect, useState } from "react";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { CheckCircle2, Clock, Eye, MessageSquarePlus } from "lucide-react";
import { feedback as feedbackAPI, SocialError, type Feedback } from "@/lib/social";
import { useAuth } from "@/components/auth/auth-provider";
import { useAuthGate } from "@/components/auth/auth-gate";
import { SettingsShell } from "@/components/settings/settings-ui";
import { cn } from "@/lib/utils";

const CATEGORY_LABEL: Record<string, string> = {
  bug: "Bug report",
  feature: "Feature request",
  general: "General feedback",
  other: "Other",
};

type Status = "resolved" | "acknowledged" | "open";

function statusOf(f: Feedback): Status {
  if (f.resolved_at) return "resolved";
  if (f.acknowledged_at) return "acknowledged";
  return "open";
}

const STATUS_META: Record<
  Status,
  { label: string; icon: React.ReactNode; className: string }
> = {
  resolved: {
    label: "Resolved",
    icon: <CheckCircle2 className="size-3.5" />,
    className:
      "bg-emerald-500/10 text-emerald-700 dark:text-emerald-300",
  },
  acknowledged: {
    label: "Acknowledged",
    icon: <Eye className="size-3.5" />,
    className: "bg-amber-500/10 text-amber-700 dark:text-amber-300",
  },
  open: {
    label: "Submitted",
    icon: <Clock className="size-3.5" />,
    className: "bg-muted text-muted-foreground",
  },
};

function formatDate(iso: string): string {
  try {
    return new Date(iso).toLocaleDateString(undefined, {
      year: "numeric",
      month: "short",
      day: "numeric",
    });
  } catch {
    return "";
  }
}

export default function FeedbacksPage() {
  const { user, loading } = useAuth();
  const { requireAuth } = useAuthGate();
  const router = useRouter();

  const [items, setItems] = useState<Feedback[] | null>(null);
  const [error, setError] = useState<string | null>(null);

  // Same auth gate as /settings/profile: prompt anonymous visitors and
  // bounce them home if they dismiss.
  useEffect(() => {
    if (loading || user) return;
    let cancelled = false;
    (async () => {
      const ok = await requireAuth();
      if (!ok && !cancelled) router.replace("/");
    })();
    return () => {
      cancelled = true;
    };
  }, [loading, user, requireAuth, router]);

  const load = useCallback(async () => {
    setError(null);
    try {
      setItems(await feedbackAPI.mine());
    } catch (err) {
      setError(
        err instanceof SocialError
          ? err.message
          : "Could not load your feedback.",
      );
    }
  }, []);

  useEffect(() => {
    if (loading || !user) return;
    void load();
  }, [loading, user, load]);

  return (
    <SettingsShell
      backHref="/settings"
      backLabel="Settings"
      title="My feedback"
      description="Everything you've sent us, with its status and our response."
    >
      {loading || !user ? (
        <p className="text-sm text-muted-foreground">
          {loading ? "Loading…" : "Sign in to see your feedback."}
        </p>
      ) : error ? (
        <div className="space-y-3">
          <p className="text-sm text-destructive">{error}</p>
          <button
            type="button"
            onClick={() => void load()}
            className="text-sm font-medium text-primary hover:underline"
          >
            Try again
          </button>
        </div>
      ) : items === null ? (
        <p className="text-sm text-muted-foreground">Loading…</p>
      ) : items.length === 0 ? (
        <EmptyState />
      ) : (
        <ul className="space-y-3">
          {items.map((f) => (
            <FeedbackCard key={f.id} feedback={f} />
          ))}
        </ul>
      )}
    </SettingsShell>
  );
}

function FeedbackCard({ feedback: f }: { feedback: Feedback }) {
  const status = statusOf(f);
  const meta = STATUS_META[status];
  // The server's label tracks renames in the admin; the map covers an older
  // BFF that doesn't send one yet.
  const category = f.category_label || CATEGORY_LABEL[f.category] || f.category;

  return (
    <li className="rounded-xl border border-border bg-card p-4 sm:p-5">
      <div className="flex flex-wrap items-center gap-x-2 gap-y-1.5 text-xs">
        <span
          className={cn(
            "inline-flex items-center gap-1 rounded-full px-2 py-0.5 font-medium",
            meta.className,
          )}
        >
          {meta.icon}
          {meta.label}
        </span>
        <span className="rounded bg-muted px-1.5 py-0.5 text-muted-foreground">
          {category}
        </span>
        <span className="text-muted-foreground">
          {formatDate(f.created_at)}
        </span>
      </div>

      <p className="mt-3 whitespace-pre-wrap text-sm text-foreground">
        {f.message}
      </p>

      {f.reply_message ? (
        <div className="mt-4 rounded-lg border-l-2 border-primary/40 bg-primary/5 px-3.5 py-3">
          <p className="text-xs font-semibold text-primary">
            Response from the team
            {f.replied_at ? (
              <span className="font-normal text-muted-foreground">
                {" · "}
                {formatDate(f.replied_at)}
              </span>
            ) : null}
          </p>
          <p className="mt-1.5 whitespace-pre-wrap text-sm text-foreground">
            {f.reply_message}
          </p>
        </div>
      ) : null}
    </li>
  );
}

function EmptyState() {
  return (
    <div className="py-14 text-center">
      <MessageSquarePlus className="mx-auto size-8 text-muted-foreground/50" />
      <p className="mt-3 text-sm text-muted-foreground">
        You haven&rsquo;t sent any feedback yet.
      </p>
      <Link
        href="/feedback"
        className="mt-4 inline-flex h-10 items-center justify-center rounded-lg bg-primary px-4 text-sm font-medium text-primary-foreground transition-colors hover:bg-primary/90"
      >
        Send feedback
      </Link>
    </div>
  );
}