'use client';

import { AlertTriangle, CheckCircle, Clock, CreditCard, Wallet } from 'lucide-react';

export type UpgradeCostSummary = {
  proratedAmount: number;
  remainingHours: number;
  currentCost: { hourly: number; monthly: number; yearly: number };
  newCost: { hourly: number; monthly: number; yearly: number };
};

export function ResourceUpgradeConfirmModal({
  open,
  upgradeCostData,
  walletBalance,
  isPending,
  onCancel,
  onConfirm,
}: {
  open: boolean;
  upgradeCostData: UpgradeCostSummary | null;
  walletBalance?: number;
  isPending: boolean;
  onCancel: () => void;
  onConfirm: () => void;
}) {
  if (!open || !upgradeCostData) return null;

  const needsPay = upgradeCostData.proratedAmount > 0;
  const walletShort =
    needsPay && walletBalance != null && upgradeCostData.proratedAmount > walletBalance;

  return (
    <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50 p-4">
      <div className="bg-white rounded-2xl shadow-2xl max-w-md w-full p-6 animate-fade-in">
        <h2 className="text-xl font-bold text-gray-900 mb-2">Confirm Resource Upgrade</h2>
        <p className="text-sm text-gray-500 mb-6">
          {needsPay
            ? 'This upgrade requires payment for the remaining billing period.'
            : 'No additional cost for this change.'}
        </p>

        <div className="bg-gray-50 rounded-xl p-4 mb-6 space-y-3">
          <div className="flex items-center justify-between">
            <span className="text-sm text-gray-600">Current hourly cost</span>
            <span className="text-sm font-medium text-gray-900">
              {upgradeCostData.currentCost.hourly.toLocaleString()} Toman/hour
            </span>
          </div>
          <div className="flex items-center justify-between">
            <span className="text-sm text-gray-600">New hourly cost</span>
            <span className="text-sm font-medium text-gray-900">
              {upgradeCostData.newCost.hourly.toLocaleString()} Toman/hour
            </span>
          </div>
          <div className="flex items-center justify-between">
            <span className="text-sm text-gray-600">Remaining hours in period</span>
            <span className="text-sm font-medium text-gray-900">{upgradeCostData.remainingHours} hours</span>
          </div>
          <div className="border-t pt-3 flex items-center justify-between">
            <span className="text-sm font-semibold text-gray-700">Prorated amount to pay</span>
            <span className="text-lg font-bold text-primary-600">
              {upgradeCostData.proratedAmount.toLocaleString()} Toman
            </span>
          </div>
        </div>

        <div className="bg-blue-50 rounded-xl p-4 mb-6 flex items-center justify-between">
          <div className="flex items-center gap-3">
            <Wallet className="w-5 h-5 text-blue-500" />
            <span className="text-sm text-blue-700">Wallet Balance</span>
          </div>
          <span className="text-lg font-bold text-blue-900">
            {walletBalance?.toLocaleString() ?? 0} Toman
          </span>
        </div>

        {walletShort && (
          <div className="bg-amber-50 border border-amber-200 rounded-lg p-3 mb-4">
            <p className="text-sm text-amber-700">
              <AlertTriangle className="w-4 h-4 inline mr-1" />
              Wallet is short by{' '}
              {(upgradeCostData.proratedAmount - (walletBalance ?? 0)).toLocaleString()} Toman. You can pay the
              delta by gateway on the invoice page.
            </p>
          </div>
        )}

        <div className="flex gap-3">
          <button
            type="button"
            onClick={onCancel}
            className="flex-1 px-4 py-2.5 border border-gray-200 rounded-xl font-medium text-gray-700 hover:bg-gray-50 transition-all"
          >
            Cancel
          </button>
          <button
            type="button"
            onClick={onConfirm}
            disabled={isPending}
            className="flex-1 px-4 py-2.5 bg-primary-600 text-white rounded-xl font-medium hover:bg-primary-700 transition-all disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
          >
            {isPending ? (
              <>
                <Clock className="w-4 h-4 animate-spin" /> Applying…
              </>
            ) : needsPay ? (
              <>
                <CreditCard className="w-4 h-4" /> Create Invoice & Pay
              </>
            ) : (
              <>
                <CheckCircle className="w-4 h-4" /> Apply Changes
              </>
            )}
          </button>
        </div>
      </div>
    </div>
  );
}