"use client";

import { FormEvent, useCallback, useEffect, useState } from "react";
import { api, ApiError, type Feature } from "@/lib/api";
import {
  AdminPageHeader,
  Banner,
  Button,
  EmptyState,
  Modal,
  StatusBadge,
  TextField,
  TextareaField,
} from "@/components/admin/controls";

export default function AdminFeaturesPage() {
  const [features, setFeatures] = useState<Feature[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState("");
  const [open, setOpen] = useState(false);

  const load = useCallback(async () => {
    setLoading(true);
    setError("");
    try {
      const page = await api.features.list(1, 100);
      setFeatures(page.items);
    } catch (e) {
      setError(e instanceof ApiError ? e.message : "خطا در بارگذاری قابلیت‌ها");
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    void load();
  }, [load]);

  return (
    <div className="space-y-6">
      <AdminPageHeader
        title="قابلیت‌ها"
        subtitle="قابلیت‌های قابل اتصال به پلن‌ها"
        action={<Button onClick={() => setOpen(true)}>قابلیت جدید</Button>}
      />

      {error && <Banner variant="error">{error}</Banner>}

      <section className="overflow-hidden rounded-2xl border border-gray-100 bg-white shadow-sm">
        {loading ? (
          <EmptyState message="در حال بارگذاری..." />
        ) : features.length === 0 ? (
          <EmptyState message="هنوز قابلیتی تعریف نشده است." />
        ) : (
          <div className="overflow-x-auto">
            <table className="w-full min-w-[640px] text-sm">
              <thead className="bg-gray-50 text-right">
                <tr>
                  <th className="px-4 py-3 font-semibold text-secondary">نام</th>
                  <th className="px-4 py-3 font-semibold text-secondary">کلید</th>
                  <th className="px-4 py-3 font-semibold text-secondary">سرویس</th>
                  <th className="px-4 py-3 font-semibold text-secondary">وضعیت</th>
                </tr>
              </thead>
              <tbody>
                {features.map((f) => (
                  <tr key={f.id} className="border-t border-gray-100">
                    <td className="px-4 py-3 font-medium text-secondary">{f.name}</td>
                    <td className="px-4 py-3 font-mono text-gray-600" dir="ltr">
                      {f.feature_key}
                    </td>
                    <td className="px-4 py-3 font-mono text-gray-600" dir="ltr">
                      {f.service_key}
                    </td>
                    <td className="px-4 py-3">
                      <StatusBadge status={f.is_active ? "active" : "inactive"} />
                    </td>
                  </tr>
                ))}
              </tbody>
            </table>
          </div>
        )}
      </section>

      <CreateFeatureModal
        open={open}
        onClose={() => setOpen(false)}
        onCreated={() => {
          setOpen(false);
          void load();
        }}
      />
    </div>
  );
}

function CreateFeatureModal({
  open,
  onClose,
  onCreated,
}: {
  open: boolean;
  onClose: () => void;
  onCreated: () => void;
}) {
  const [featureKey, setFeatureKey] = useState("");
  const [name, setName] = useState("");
  const [serviceKey, setServiceKey] = useState("");
  const [description, setDescription] = useState("");
  const [saving, setSaving] = useState(false);
  const [error, setError] = useState("");

  const handleSubmit = async (e: FormEvent) => {
    e.preventDefault();
    setError("");
    setSaving(true);
    try {
      await api.features.create({
        feature_key: featureKey.trim(),
        name: name.trim(),
        service_key: serviceKey.trim(),
        description: description.trim() || null,
      });
      setFeatureKey("");
      setName("");
      setServiceKey("");
      setDescription("");
      onCreated();
    } catch (err) {
      setError(err instanceof ApiError ? err.message : "ایجاد قابلیت ناموفق بود");
    } finally {
      setSaving(false);
    }
  };

  return (
    <Modal open={open} title="ایجاد قابلیت جدید" onClose={onClose}>
      <form onSubmit={handleSubmit} className="space-y-4">
        <TextField
          label="کلید قابلیت"
          required
          dir="ltr"
          className="font-mono"
          value={featureKey}
          onValue={setFeatureKey}
          disabled={saving}
          placeholder="sms.bulk_send"
        />
        <TextField label="نام" required value={name} onValue={setName} disabled={saving} />
        <TextField
          label="کلید سرویس"
          required
          dir="ltr"
          className="font-mono"
          value={serviceKey}
          onValue={setServiceKey}
          disabled={saving}
          placeholder="sms-service"
        />
        <TextareaField
          label="توضیحات"
          value={description}
          onValue={setDescription}
          disabled={saving}
        />
        {error && <Banner variant="error">{error}</Banner>}
        <div className="flex justify-end gap-3 pt-2">
          <Button variant="outline" onClick={onClose} type="button">
            انصراف
          </Button>
          <Button type="submit" loading={saving} loadingText="در حال ایجاد...">
            ایجاد قابلیت
          </Button>
        </div>
      </form>
    </Modal>
  );
}