"use client";

import { useState } from "react";
import { trpc } from "~/lib/trpc/client.js";
import { BroadcastModal } from "./BroadcastModal.js";
import { CreateTaskModal } from "./CreateTaskModal.js";

function formatDate(date: string | Date): string {
  const d = typeof date === "string" ? new Date(date) : date;
  return d.toLocaleDateString("en-GB", {
    day: "2-digit",
    month: "short",
    year: "numeric",
    hour: "2-digit",
    minute: "2-digit",
  });
}

const TARGET_LABELS: Record<string, string> = {
  all: "All Users",
  role: "By Role",
  project: "By Project",
  orgUnit: "By Org Unit",
  user: "Specific User",
};

export function BroadcastManagementClient() {
  const [showModal, setShowModal] = useState(false);
  const [showTaskModal, setShowTaskModal] = useState(false);

  const { data: broadcasts = [], isLoading } = trpc.notification.listBroadcasts.useQuery(
    { limit: 50 },
    { staleTime: 30_000 },
  );

  const utils = trpc.useUtils();

  function handleSuccess() {
    void utils.notification.listBroadcasts.invalidate();
  }

  return (
    <div className="mx-auto max-w-4xl px-4 py-8 sm:px-6">
      {/* Header */}
      <div className="flex items-center justify-between mb-6">
        <h1 className="text-2xl font-bold text-gray-900 dark:text-gray-50">Broadcast Management</h1>
        <div className="flex items-center gap-3">
          <button
            type="button"
            onClick={() => setShowTaskModal(true)}
            className="inline-flex items-center gap-1.5 rounded-lg border border-brand-600 px-4 py-2 text-sm font-medium text-brand-600 hover:bg-brand-50 dark:hover:bg-brand-900/20 transition-colors"
          >
            <svg className="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4" />
            </svg>
            Create Task
          </button>
          <button
            type="button"
            onClick={() => setShowModal(true)}
            className="inline-flex items-center gap-1.5 rounded-lg bg-brand-600 px-4 py-2 text-sm font-medium text-white hover:bg-brand-700 transition-colors"
          >
            <svg className="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4v16m8-8H4" />
            </svg>
            Send Broadcast
          </button>
        </div>
      </div>

      {/* Loading */}
      {isLoading && (
        <div className="space-y-3">
          {[...Array(3)].map((_, i) => (
            <div key={i} className="rounded-xl border border-gray-200 dark:border-gray-700 p-4 animate-row-enter" style={{ animationDelay: `${i * 50}ms` }}>
              <div className="h-4 w-1/2 shimmer-skeleton rounded" />
              <div className="mt-2 h-3 w-1/3 shimmer-skeleton rounded" />
            </div>
          ))}
        </div>
      )}

      {/* Table */}
      {!isLoading && (
        <>
          {broadcasts.length === 0 ? (
            <div className="rounded-xl border border-dashed border-gray-300 dark:border-gray-600 py-12 text-center text-sm text-gray-400 dark:text-gray-500">
              No broadcasts sent yet.
            </div>
          ) : (
            <div className="overflow-hidden rounded-xl border border-gray-200 dark:border-gray-700">
              <table className="min-w-full divide-y divide-gray-200 dark:divide-gray-700">
                <thead className="bg-gray-50 dark:bg-gray-800">
                  <tr>
                    <th scope="col" className="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">
                      Title
                    </th>
                    <th scope="col" className="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">
                      Target
                    </th>
                    <th scope="col" className="px-4 py-3 text-right text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">
                      Recipients
                    </th>
                    <th scope="col" className="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">
                      Sender
                    </th>
                    <th scope="col" className="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">
                      Date
                    </th>
                  </tr>
                </thead>
                <tbody className="divide-y divide-gray-200 dark:divide-gray-700 bg-white dark:bg-gray-900">
                  {broadcasts.map((b) => (
                    <tr key={b.id} className="hover:bg-gray-50 dark:hover:bg-gray-800 transition-colors">
                      <td className="px-4 py-3">
                        <p className="text-sm font-medium text-gray-900 dark:text-gray-100 truncate max-w-[200px]">
                          {b.title}
                        </p>
                        {b.body && (
                          <p className="text-xs text-gray-500 dark:text-gray-400 truncate max-w-[200px]">
                            {b.body}
                          </p>
                        )}
                      </td>
                      <td className="px-4 py-3 text-sm text-gray-600 dark:text-gray-300">
                        {TARGET_LABELS[b.targetType] ?? b.targetType}
                        {b.targetValue && (
                          <span className="ml-1 text-gray-400 dark:text-gray-500">({b.targetValue})</span>
                        )}
                      </td>
                      <td className="px-4 py-3 text-sm text-right text-gray-600 dark:text-gray-300">
                        {b.recipientCount ?? 0}
                      </td>
                      <td className="px-4 py-3 text-sm text-gray-600 dark:text-gray-300">
                        {b.sender?.name ?? b.sender?.email ?? "-"}
                      </td>
                      <td className="px-4 py-3 text-sm text-gray-500 dark:text-gray-400">
                        {b.sentAt ? formatDate(b.sentAt) : "Scheduled"}
                      </td>
                    </tr>
                  ))}
                </tbody>
              </table>
            </div>
          )}
        </>
      )}

      {/* Broadcast Modal */}
      {showModal && (
        <BroadcastModal
          onClose={() => setShowModal(false)}
          onSuccess={handleSuccess}
        />
      )}

      {/* Create Task Modal */}
      {showTaskModal && (
        <CreateTaskModal
          onClose={() => setShowTaskModal(false)}
          onSuccess={handleSuccess}
        />
      )}
    </div>
  );
}