"use client";

import Link from "next/link";
import { useState } from "react";
import { Building2, Pause, Play, Plus, RefreshCw, Trash2 } from "lucide-react";
import { CompanyStatusBadge } from "@/components/ui/badge";
import { useCompanies, useDeleteCompany, useSetCompanyPaused } from "@/hooks/use-companies";
import { useRunAnyCompanyNow } from "@/hooks/use-monitoring-runs";
import { FREQUENCY_LABELS } from "@/lib/types";
import { formatDateTime } from "@/lib/format";

export default function CompaniesPage() {
  const { data: companies, isLoading } = useCompanies();
  const setPaused = useSetCompanyPaused();
  const deleteCompany = useDeleteCompany();
  const runNow = useRunAnyCompanyNow();
  const [pendingDeleteId, setPendingDeleteId] = useState<string | null>(null);

  const companyList = companies ?? [];

  return (
    <div>
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-semibold text-slate-900">Companies</h1>
          <p className="mt-1 text-sm text-slate-600">
            Everything you&apos;re currently monitoring.
          </p>
        </div>
        <Link
          href="/companies/new"
          className="focus-ring inline-flex items-center gap-2 rounded-md bg-brand-600 px-4 py-2 text-sm font-semibold text-white hover:bg-brand-700"
        >
          <Plus className="h-4 w-4" aria-hidden /> Add company
        </Link>
      </div>

      {isLoading ? (
        <p className="mt-8 text-sm text-slate-500">Loading…</p>
      ) : companyList.length === 0 ? (
        <div className="mt-8 rounded-lg border border-dashed border-slate-300 bg-white p-10 text-center">
          <Building2 className="mx-auto h-8 w-8 text-slate-400" aria-hidden />
          <p className="mt-3 text-sm text-slate-600">No companies yet.</p>
          <Link
            href="/companies/new"
            className="focus-ring mt-4 inline-block rounded-md bg-brand-600 px-4 py-2 text-sm font-semibold text-white hover:bg-brand-700"
          >
            Add your first company
          </Link>
        </div>
      ) : (
        <div className="mt-6 overflow-x-auto rounded-lg border border-slate-200 bg-white">
          <table className="w-full min-w-[720px] text-left text-sm">
            <thead className="border-b border-slate-200 bg-slate-50 text-xs uppercase tracking-wide text-slate-500">
              <tr>
                <th className="px-4 py-3">Company</th>
                <th className="px-4 py-3">Status</th>
                <th className="px-4 py-3">Frequency</th>
                <th className="px-4 py-3">Last checked</th>
                <th className="px-4 py-3">Next check</th>
                <th className="px-4 py-3">Alerts</th>
                <th className="px-4 py-3 text-right">Actions</th>
              </tr>
            </thead>
            <tbody className="divide-y divide-slate-100">
              {companyList.map((company) => (
                <tr key={company.id}>
                  <td className="px-4 py-3">
                    <Link
                      href={`/companies/${company.id}`}
                      className="font-medium text-slate-900 hover:text-brand-600"
                    >
                      {company.name}
                    </Link>
                    {company.official_website && (
                      <div className="text-xs text-slate-500">{company.official_website}</div>
                    )}
                  </td>
                  <td className="px-4 py-3">
                    <CompanyStatusBadge status={company.status} />
                  </td>
                  <td className="px-4 py-3 text-slate-600">
                    {company.monitor_configuration
                      ? FREQUENCY_LABELS[company.monitor_configuration.frequency_type]
                      : "—"}
                  </td>
                  <td className="px-4 py-3 text-slate-600">
                    {formatDateTime(company.monitor_configuration?.last_run)}
                  </td>
                  <td className="px-4 py-3 text-slate-600">
                    {formatDateTime(company.monitor_configuration?.next_run)}
                  </td>
                  <td className="px-4 py-3 text-slate-600">{company.unresolved_alert_count}</td>
                  <td className="px-4 py-3">
                    <div className="flex items-center justify-end gap-1">
                      <button
                        title={
                          company.status === "active" ? "Pause monitoring" : "Resume monitoring"
                        }
                        onClick={() =>
                          setPaused.mutate({
                            companyId: company.id,
                            paused: company.status === "active",
                          })
                        }
                        className="focus-ring rounded-md p-2 text-slate-500 hover:bg-slate-100"
                      >
                        {company.status === "active" ? (
                          <Pause className="h-4 w-4" aria-hidden />
                        ) : (
                          <Play className="h-4 w-4" aria-hidden />
                        )}
                        <span className="sr-only">
                          {company.status === "active" ? "Pause" : "Resume"} {company.name}
                        </span>
                      </button>
                      <button
                        title="Run now"
                        onClick={() => runNow.mutate(company.id)}
                        disabled={runNow.isPending}
                        className="focus-ring rounded-md p-2 text-slate-500 hover:bg-slate-100 disabled:opacity-60"
                      >
                        <RefreshCw className="h-4 w-4" aria-hidden />
                        <span className="sr-only">Run now for {company.name}</span>
                      </button>
                      {pendingDeleteId === company.id ? (
                        <div className="flex items-center gap-1 text-xs">
                          <span className="text-slate-600">Delete?</span>
                          <button
                            onClick={() => deleteCompany.mutate(company.id)}
                            className="focus-ring rounded-md bg-red-600 px-2 py-1 font-semibold text-white hover:bg-red-700"
                          >
                            Yes
                          </button>
                          <button
                            onClick={() => setPendingDeleteId(null)}
                            className="focus-ring rounded-md px-2 py-1 text-slate-600 hover:bg-slate-100"
                          >
                            No
                          </button>
                        </div>
                      ) : (
                        <button
                          title="Delete company"
                          onClick={() => setPendingDeleteId(company.id)}
                          className="focus-ring rounded-md p-2 text-slate-500 hover:bg-red-50 hover:text-red-600"
                        >
                          <Trash2 className="h-4 w-4" aria-hidden />
                          <span className="sr-only">Delete {company.name}</span>
                        </button>
                      )}
                    </div>
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      )}
    </div>
  );
}