"use client";

import React from "react";
import { formatPlanShort } from "@/lib/utils";
import {
  DevicePhoneMobileIcon,
  CheckCircleIcon,
  ExclamationTriangleIcon,
  XCircleIcon,
  ClockIcon,
} from "@heroicons/react/24/outline";
import type { SimDetails, SimStatus } from "@customer-portal/domain/sim";

interface SimDetailsCardProps {
  simDetails: SimDetails;
  isLoading?: boolean;
  error?: string | null;
  embedded?: boolean;
  showFeaturesSummary?: boolean;
}

const STATUS_ICON_MAP: Record<SimStatus, React.ReactNode> = {
  active: <CheckCircleIcon className="h-5 w-5 text-green-500" />,
  suspended: <ExclamationTriangleIcon className="h-5 w-5 text-yellow-500" />,
  cancelled: <XCircleIcon className="h-5 w-5 text-red-500" />,
  pending: <ClockIcon className="h-5 w-5 text-blue-500" />,
};

const STATUS_BADGE_CLASS_MAP: Record<SimStatus, string> = {
  active: "bg-green-100 text-green-800",
  suspended: "bg-yellow-100 text-yellow-800",
  cancelled: "bg-red-100 text-red-800",
  pending: "bg-blue-100 text-blue-800",
};

const formatDate = (value?: string | null) => {
  if (!value) return "-";
  const date = new Date(value);
  return Number.isNaN(date.getTime())
    ? value
    : date.toLocaleDateString("en-US", { year: "numeric", month: "short", day: "numeric" });
};

const formatQuota = (remainingMb: number) => {
  if (remainingMb >= 1000) {
    return `${(remainingMb / 1000).toFixed(1)} GB`;
  }
  return `${remainingMb.toFixed(0)} MB`;
};

const FeatureToggleRow = ({ label, enabled }: { label: string; enabled: boolean }) => (
  <div className="flex items-center justify-between py-2 px-3 bg-gray-50 rounded-lg">
    <span className="text-sm text-gray-700">{label}</span>
    <span
      className={`text-xs font-semibold px-2 py-1 rounded-full ${
        enabled ? "bg-green-100 text-green-700" : "bg-gray-200 text-gray-600"
      }`}
    >
      {enabled ? "Enabled" : "Disabled"}
    </span>
  </div>
);

const LoadingCard = ({ embedded }: { embedded: boolean }) => (
  <div
    className={`${embedded ? "" : "bg-white shadow rounded-xl border border-gray-100"} p-6 lg:p-8`}
  >
    <div className="animate-pulse space-y-4">
      <div className="flex items-center gap-4">
        <div className="h-12 w-12 rounded-full bg-gray-200" />
        <div className="flex-1 space-y-2">
          <div className="h-4 bg-gray-200 rounded w-1/2" />
          <div className="h-4 bg-gray-200 rounded w-1/3" />
        </div>
      </div>
      <div className="h-4 bg-gray-200 rounded" />
      <div className="h-4 bg-gray-200 rounded w-5/6" />
      <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
        <div className="h-24 bg-gray-200 rounded" />
        <div className="h-24 bg-gray-200 rounded" />
      </div>
    </div>
  </div>
);

const ErrorCard = ({ embedded, message }: { embedded: boolean; message: string }) => (
  <div
    className={`${embedded ? "" : "bg-white shadow rounded-xl border border-red-100"} p-6 lg:p-8`}
  >
    <div className="text-center text-red-600 text-sm">{message}</div>
  </div>
);

export function SimDetailsCard({
  simDetails,
  isLoading = false,
  error = null,
  embedded = false,
  showFeaturesSummary = true,
}: SimDetailsCardProps) {
  if (isLoading) {
    return <LoadingCard embedded={embedded} />;
  }

  if (error) {
    return <ErrorCard embedded={embedded} message={error} />;
  }

  const planName = simDetails.planName || formatPlanShort(simDetails.planCode) || "SIM Plan";
  const statusIcon = STATUS_ICON_MAP[simDetails.status] ?? (
    <DevicePhoneMobileIcon className="h-5 w-5 text-gray-500" />
  );
  const statusClass = STATUS_BADGE_CLASS_MAP[simDetails.status] ?? "bg-gray-100 text-gray-800";
  const containerClasses = embedded ? "" : "bg-white shadow-lg rounded-xl border border-gray-100";

  return (
    <div className={`${containerClasses} ${embedded ? "" : "p-6 lg:p-8"}`}>
      <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4">
        <div className="flex items-center gap-3">
          <div className="rounded-xl bg-blue-50 p-3">
            <DevicePhoneMobileIcon className="h-7 w-7 text-blue-600" />
          </div>
          <div>
            <h3 className="text-xl font-semibold text-gray-900">{planName}</h3>
            <p className="text-sm text-gray-600">Account #{simDetails.account}</p>
          </div>
        </div>
        <span className={`inline-flex items-center gap-2 px-3 py-1 rounded-full ${statusClass}`}>
          {statusIcon}
          <span className="text-sm font-medium capitalize">{simDetails.status}</span>
        </span>
      </div>

      <div className="mt-6 grid grid-cols-1 lg:grid-cols-2 gap-6">
        <div className="space-y-4">
          <section className="bg-gray-50 rounded-lg p-4">
            <h4 className="text-xs font-medium text-gray-500 uppercase tracking-wide mb-3">
              SIM Information
            </h4>
            <dl className="space-y-2 text-sm text-gray-700">
              <div className="flex justify-between">
                <dt className="font-medium text-gray-600">Phone Number</dt>
                <dd className="font-semibold text-gray-900">{simDetails.msisdn}</dd>
              </div>
              <div className="flex justify-between">
                <dt className="font-medium text-gray-600">SIM Type</dt>
                <dd className="font-semibold text-gray-900">{simDetails.simType}</dd>
              </div>
              <div className="flex justify-between">
                <dt className="font-medium text-gray-600">ICCID</dt>
                <dd className="font-mono text-gray-900 break-all">{simDetails.iccid}</dd>
              </div>
              {simDetails.eid && (
                <div className="flex justify-between">
                  <dt className="font-medium text-gray-600">EID</dt>
                  <dd className="font-mono text-gray-900 break-all">{simDetails.eid}</dd>
                </div>
              )}
              <div className="flex justify-between">
                <dt className="font-medium text-gray-600">Network Type</dt>
                <dd className="font-semibold text-gray-900">{simDetails.networkType}</dd>
              </div>
            </dl>
          </section>

          <section className="bg-gray-50 rounded-lg p-4">
            <h4 className="text-xs font-medium text-gray-500 uppercase tracking-wide mb-3">
              Data Remaining
            </h4>
            <p className="text-2xl font-bold text-green-600">
              {formatQuota(simDetails.remainingQuotaMb)}
            </p>
            <p className="text-xs text-gray-500 mt-1">Remaining allowance in current cycle</p>
          </section>

          <section className="bg-gray-50 rounded-lg p-4">
            <h4 className="text-xs font-medium text-gray-500 uppercase tracking-wide mb-3">
              Activation Timeline
            </h4>
            <dl className="space-y-2 text-sm text-gray-700">
              <div className="flex justify-between">
                <dt className="font-medium text-gray-600">Activated</dt>
                <dd>{formatDate(simDetails.activatedAt)}</dd>
              </div>
              <div className="flex justify-between">
                <dt className="font-medium text-gray-600">Expires</dt>
                <dd>{formatDate(simDetails.expiresAt)}</dd>
              </div>
            </dl>
          </section>
        </div>

        {showFeaturesSummary && (
          <section className="space-y-3">
            <h4 className="text-sm font-semibold text-gray-700 uppercase tracking-wide">
              Service Features
            </h4>
            <FeatureToggleRow label="Voice Mail" enabled={simDetails.voiceMailEnabled} />
            <FeatureToggleRow label="Call Waiting" enabled={simDetails.callWaitingEnabled} />
            <FeatureToggleRow
              label="International Roaming"
              enabled={simDetails.internationalRoamingEnabled}
            />
          </section>
        )}
      </div>
    </div>
  );
}

export type { SimDetails };