"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";

interface Status {
  configured: boolean;
  enabled: boolean;
  user: string | null;
  imapHost: string | null;
  verifiedAt: number | null;
  smtpHost: string | null;
  smtpPort: number | null;
}

export function MailboxForm({ status }: { status: Status }) {
  const router = useRouter();
  const [imapHost, setImapHost] = useState(status.imapHost ?? "");
  const [imapPort, setImapPort] = useState("993");
  const [user, setUser] = useState(status.user ?? "");
  const [password, setPassword] = useState("");
  const [allowInsecureTls, setAllowInsecureTls] = useState(false);
  const [smtpHost, setSmtpHost] = useState(status.smtpHost ?? "");
  const [smtpPort, setSmtpPort] = useState(status.smtpPort?.toString() ?? "465");
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault();
    setLoading(true);
    setError(null);

    const res = await fetch("/api/settings/mailbox", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        imapHost,
        imapPort: Number(imapPort),
        user,
        password,
        allowInsecureTls,
        smtpHost: smtpHost || undefined,
        smtpPort: smtpPort ? Number(smtpPort) : undefined,
      }),
    });

    setLoading(false);
    if (!res.ok) {
      const data = await res.json().catch(() => null);
      setError(data?.error ?? "Не удалось подключиться к почтовому ящику");
      return;
    }
    setPassword("");
    router.refresh();
  }

  async function handleDisable() {
    setLoading(true);
    await fetch("/api/settings/mailbox", { method: "DELETE" });
    setLoading(false);
    router.refresh();
  }

  return (
    <div className="card p-4">
      <h2 className="mb-3 text-sm font-semibold text-text-muted">Почтовый ящик для запросов (IMAP)</h2>

      <div className="mb-4 text-sm">
        {status.configured ? (
          <p className="text-text-muted">
            {status.enabled ? "Активен" : "Отключен"}: {status.user} @ {status.imapHost}
            {status.verifiedAt && ` — проверен ${new Date(status.verifiedAt).toLocaleString("ru-RU")}`}
          </p>
        ) : (
          <p className="text-text-faint">Ещё не настроен.</p>
        )}
      </div>

      <form onSubmit={handleSubmit} className="grid grid-cols-1 gap-3 sm:grid-cols-2">
        <label className="text-sm">
          <span className="mb-1 block font-medium text-text-muted">IMAP-сервер</span>
          <input
            required
            value={imapHost}
            onChange={(e) => setImapHost(e.target.value)}
            placeholder="imap.yandex.ru"
            className="w-full rounded-md border border-border bg-surface px-3 py-2 outline-none focus:border-accent"
          />
        </label>
        <label className="text-sm">
          <span className="mb-1 block font-medium text-text-muted">Порт</span>
          <input
            type="number"
            required
            value={imapPort}
            onChange={(e) => setImapPort(e.target.value)}
            className="w-full rounded-md border border-border bg-surface px-3 py-2 outline-none focus:border-accent"
          />
        </label>
        <label className="text-sm">
          <span className="mb-1 block font-medium text-text-muted">Логин</span>
          <input
            required
            value={user}
            onChange={(e) => setUser(e.target.value)}
            className="w-full rounded-md border border-border bg-surface px-3 py-2 outline-none focus:border-accent"
          />
        </label>
        <label className="text-sm">
          <span className="mb-1 block font-medium text-text-muted">Пароль</span>
          <input
            type="password"
            required
            value={password}
            onChange={(e) => setPassword(e.target.value)}
            className="w-full rounded-md border border-border bg-surface px-3 py-2 outline-none focus:border-accent"
          />
        </label>
        <label className="flex items-center gap-2 text-sm sm:col-span-2">
          <input type="checkbox" checked={allowInsecureTls} onChange={(e) => setAllowInsecureTls(e.target.checked)} />
          <span className="text-text-muted">Разрешить недоверенный TLS-сертификат</span>
        </label>

        <div className="sm:col-span-2 border-t border-border pt-3">
          <p className="mb-2 text-sm font-medium text-text-muted">
            Исходящая почта (SMTP) — для уведомлений клиенту о статусе заявки. Тот же логин/пароль, что выше. Необязательно.
          </p>
        </div>
        <label className="text-sm">
          <span className="mb-1 block font-medium text-text-muted">SMTP-сервер</span>
          <input
            value={smtpHost}
            onChange={(e) => setSmtpHost(e.target.value)}
            placeholder="smtp.yandex.ru"
            className="w-full rounded-md border border-border bg-surface px-3 py-2 outline-none focus:border-accent"
          />
        </label>
        <label className="text-sm">
          <span className="mb-1 block font-medium text-text-muted">Порт</span>
          <input
            type="number"
            value={smtpPort}
            onChange={(e) => setSmtpPort(e.target.value)}
            className="w-full rounded-md border border-border bg-surface px-3 py-2 outline-none focus:border-accent"
          />
        </label>

        {error && <p className="sm:col-span-2 rounded-md bg-danger-soft px-3 py-2 text-sm text-danger-soft-text">{error}</p>}

        <div className="flex gap-2 sm:col-span-2">
          <button type="submit" disabled={loading} className="btn btn-primary">
            {loading ? "Проверяем…" : "Проверить и сохранить"}
          </button>
          {status.configured && status.enabled && (
            <button type="button" onClick={handleDisable} disabled={loading} className="btn btn-ghost">
              Отключить
            </button>
          )}
        </div>
      </form>
    </div>
  );
}