"use client";

import { useCallback, useEffect, useState, type FormEvent } from "react";

const STORAGE_KEY = "s2vid_admin_api_key";

export type AdminBadge = {
  id: string;
  name: string;
  embedHtml: string | null;
  imageUrl: string | null;
  linkUrl: string | null;
  isActive: boolean;
  sortOrder: number;
  createdAt: string;
  updatedAt: string;
};

function authHeaders(key: string): HeadersInit {
  return {
    Authorization: `Bearer ${key}`,
    "Content-Type": "application/json",
  };
}

export function AdminBadgePanel() {
  const [apiKey, setApiKey] = useState("");
  const [unlocked, setUnlocked] = useState(false);
  const [badges, setBadges] = useState<AdminBadge[]>([]);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [success, setSuccess] = useState<string | null>(null);

  const [name, setName] = useState("");
  const [embedHtml, setEmbedHtml] = useState("");
  const [imageUrl, setImageUrl] = useState("");
  const [linkUrl, setLinkUrl] = useState("");
  const [saving, setSaving] = useState(false);

  useEffect(() => {
    const stored = sessionStorage.getItem(STORAGE_KEY);
    if (stored) {
      setApiKey(stored);
      setUnlocked(true);
    }
  }, []);

  const loadBadges = useCallback(async (key: string) => {
    setLoading(true);
    setError(null);
    try {
      const res = await fetch("/api/admin/badges", {
        headers: authHeaders(key),
      });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "Failed to load badges");
      setBadges(data.badges);
      setUnlocked(true);
      sessionStorage.setItem(STORAGE_KEY, key);
    } catch (err) {
      setUnlocked(false);
      setBadges([]);
      setError(err instanceof Error ? err.message : "Failed to load badges");
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    if (unlocked && apiKey) {
      void loadBadges(apiKey);
    }
  }, [unlocked, apiKey, loadBadges]);

  async function unlock(e: FormEvent) {
    e.preventDefault();
    const key = apiKey.trim();
    if (!key) {
      setError("Enter ADMIN_API_KEY");
      return;
    }
    await loadBadges(key);
  }

  function lock() {
    sessionStorage.removeItem(STORAGE_KEY);
    setApiKey("");
    setUnlocked(false);
    setBadges([]);
    setSuccess(null);
    setError(null);
  }

  async function createBadge(e: FormEvent) {
    e.preventDefault();
    setSaving(true);
    setError(null);
    setSuccess(null);
    try {
      const res = await fetch("/api/admin/badges", {
        method: "POST",
        headers: authHeaders(apiKey),
        body: JSON.stringify({
          name: name.trim(),
          embedHtml: embedHtml.trim() || null,
          imageUrl: imageUrl.trim() || null,
          linkUrl: linkUrl.trim() || null,
          isActive: true,
        }),
      });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "Failed to create badge");
      setName("");
      setEmbedHtml("");
      setImageUrl("");
      setLinkUrl("");
      setSuccess(`Added “${data.badge.name}”`);
      await loadBadges(apiKey);
    } catch (err) {
      setError(err instanceof Error ? err.message : "Failed to create badge");
    } finally {
      setSaving(false);
    }
  }

  async function toggleActive(badge: AdminBadge) {
    setError(null);
    setSuccess(null);
    try {
      const res = await fetch(`/api/admin/badges/${badge.id}`, {
        method: "PATCH",
        headers: authHeaders(apiKey),
        body: JSON.stringify({ isActive: !badge.isActive }),
      });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "Failed to update badge");
      setSuccess(
        data.badge.isActive
          ? `“${data.badge.name}” is now active`
          : `“${data.badge.name}” is now inactive`,
      );
      await loadBadges(apiKey);
    } catch (err) {
      setError(err instanceof Error ? err.message : "Failed to update badge");
    }
  }

  async function removeBadge(badge: AdminBadge) {
    if (!confirm(`Delete badge “${badge.name}”?`)) return;
    setError(null);
    setSuccess(null);
    try {
      const res = await fetch(`/api/admin/badges/${badge.id}`, {
        method: "DELETE",
        headers: authHeaders(apiKey),
      });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "Failed to delete badge");
      setSuccess(`Deleted “${badge.name}”`);
      await loadBadges(apiKey);
    } catch (err) {
      setError(err instanceof Error ? err.message : "Failed to delete badge");
    }
  }

  if (!unlocked) {
    return (
      <section className="rounded-lg border border-gray-700 bg-surface-light p-6">
        <h2 className="mb-2 text-lg font-semibold text-white">Admin unlock</h2>
        <p className="mb-4 text-sm text-gray-400">
          Enter <code className="text-gray-300">ADMIN_API_KEY</code> to manage footer badges.
          The key stays in this browser tab only (sessionStorage).
        </p>
        <form onSubmit={unlock} className="flex flex-col gap-3 sm:flex-row">
          <input
            type="password"
            value={apiKey}
            onChange={(e) => setApiKey(e.target.value)}
            placeholder="ADMIN_API_KEY"
            className="input-field flex-1"
            autoComplete="off"
          />
          <button
            type="submit"
            disabled={loading}
            className="rounded bg-accent px-4 py-2 text-sm font-medium text-black hover:opacity-90 disabled:opacity-50"
          >
            {loading ? "Checking…" : "Unlock"}
          </button>
        </form>
        {error ? <p className="mt-3 text-sm text-red-400">{error}</p> : null}
      </section>
    );
  }

  return (
    <div className="space-y-6">
      <div className="flex items-center justify-between gap-4">
        <p className="text-sm text-gray-400">
          Authenticated with admin API key. Changes apply to the live footer marquee.
        </p>
        <button
          type="button"
          onClick={lock}
          className="shrink-0 text-sm text-gray-400 underline-offset-2 hover:text-white hover:underline"
        >
          Lock
        </button>
      </div>

      {error ? <p className="text-sm text-red-400">{error}</p> : null}
      {success ? <p className="text-sm text-emerald-400">{success}</p> : null}

      <section className="rounded-lg border border-gray-700 bg-surface-light p-6">
        <h2 className="mb-1 text-lg font-semibold text-white">Add badge</h2>
        <p className="mb-4 text-sm text-gray-400">
          Paste a Product Hunt / LaunchBuff embed (HTML), or set image + link URLs.
        </p>
        <form onSubmit={createBadge} className="space-y-4">
          <div>
            <label className="mb-1 block text-xs font-semibold uppercase tracking-wider text-gray-500">
              Name
            </label>
            <input
              value={name}
              onChange={(e) => setName(e.target.value)}
              className="input-field"
              placeholder="Product Hunt"
              required
            />
          </div>
          <div>
            <label className="mb-1 block text-xs font-semibold uppercase tracking-wider text-gray-500">
              Embed HTML / script
            </label>
            <textarea
              value={embedHtml}
              onChange={(e) => setEmbedHtml(e.target.value)}
              className="input-field min-h-[120px] font-mono text-xs"
              placeholder='<a href="..."><img src="..." /></a>'
              spellCheck={false}
            />
          </div>
          <div className="grid gap-4 sm:grid-cols-2">
            <div>
              <label className="mb-1 block text-xs font-semibold uppercase tracking-wider text-gray-500">
                Image URL (optional)
              </label>
              <input
                value={imageUrl}
                onChange={(e) => setImageUrl(e.target.value)}
                className="input-field"
                placeholder="https://…"
              />
            </div>
            <div>
              <label className="mb-1 block text-xs font-semibold uppercase tracking-wider text-gray-500">
                Link URL (optional)
              </label>
              <input
                value={linkUrl}
                onChange={(e) => setLinkUrl(e.target.value)}
                className="input-field"
                placeholder="https://…"
              />
            </div>
          </div>
          <button
            type="submit"
            disabled={saving}
            className="rounded bg-accent px-4 py-2 text-sm font-medium text-black hover:opacity-90 disabled:opacity-50"
          >
            {saving ? "Saving…" : "Add badge"}
          </button>
        </form>
      </section>

      <section className="rounded-lg border border-gray-700 bg-surface-light p-6">
        <div className="mb-4 flex items-center justify-between">
          <h2 className="text-lg font-semibold text-white">Badges</h2>
          <button
            type="button"
            onClick={() => loadBadges(apiKey)}
            disabled={loading}
            className="text-sm text-gray-400 hover:text-white"
          >
            {loading ? "Refreshing…" : "Refresh"}
          </button>
        </div>

        {badges.length === 0 ? (
          <p className="text-sm text-gray-500">No badges yet.</p>
        ) : (
          <ul className="divide-y divide-gray-800">
            {badges.map((badge) => (
              <li
                key={badge.id}
                className="flex flex-col gap-3 py-4 sm:flex-row sm:items-center sm:justify-between"
              >
                <div className="min-w-0 flex-1">
                  <div className="flex flex-wrap items-center gap-2">
                    <span className="font-medium text-white">{badge.name}</span>
                    <span
                      className={`rounded px-1.5 py-0.5 text-[10px] font-semibold uppercase tracking-wide ${
                        badge.isActive
                          ? "bg-emerald-500/15 text-emerald-400"
                          : "bg-gray-700 text-gray-400"
                      }`}
                    >
                      {badge.isActive ? "Active" : "Inactive"}
                    </span>
                    <span className="text-xs text-gray-600">order {badge.sortOrder}</span>
                  </div>
                  <p className="mt-1 truncate text-xs text-gray-500">
                    {badge.linkUrl || badge.imageUrl || (badge.embedHtml ? "embed HTML" : "—")}
                  </p>
                  {badge.imageUrl ? (
                    // eslint-disable-next-line @next/next/no-img-element
                    <img
                      src={badge.imageUrl}
                      alt=""
                      className="mt-2 h-10 w-auto max-w-[200px] object-contain opacity-90"
                    />
                  ) : null}
                </div>
                <div className="flex shrink-0 gap-2">
                  <button
                    type="button"
                    onClick={() => toggleActive(badge)}
                    className="rounded border border-gray-600 px-3 py-1.5 text-xs text-gray-200 hover:border-gray-400 hover:text-white"
                  >
                    {badge.isActive ? "Deactivate" : "Activate"}
                  </button>
                  <button
                    type="button"
                    onClick={() => removeBadge(badge)}
                    className="rounded border border-red-900/60 px-3 py-1.5 text-xs text-red-400 hover:border-red-500 hover:text-red-300"
                  >
                    Delete
                  </button>
                </div>
              </li>
            ))}
          </ul>
        )}
      </section>
    </div>
  );
}