"use client";

import { forwardRef } from "react";
import Link from "next/link";
import { format } from "date-fns";
import {
  ServerIcon,
  CheckCircleIcon,
  ExclamationTriangleIcon,
  ClockIcon,
  XCircleIcon,
  CalendarIcon,
  ArrowTopRightOnSquareIcon,
} from "@heroicons/react/24/outline";
import { StatusPill } from "@/components/atoms/status-pill";
import { Button } from "@/components/atoms/button";
import { SubCard } from "@/components/molecules/SubCard/SubCard";
import { Formatting } from "@customer-portal/domain/toolkit";
import type { Subscription } from "@customer-portal/domain/subscriptions";

const { formatCurrency, getCurrencyLocale } = Formatting;
import { cn } from "@/lib/utils";

interface SubscriptionCardProps {
  subscription: Subscription;
  variant?: "list" | "grid";
  showActions?: boolean;
  onViewClick?: (subscription: Subscription) => void;
  className?: string;
}

const getStatusIcon = (status: string) => {
  switch (status) {
    case "Active":
      return <CheckCircleIcon className="h-5 w-5 text-green-500" />;
    case "Suspended":
      return <ExclamationTriangleIcon className="h-5 w-5 text-yellow-500" />;
    case "Pending":
      return <ClockIcon className="h-5 w-5 text-blue-500" />;
    case "Cancelled":
    case "Terminated":
      return <XCircleIcon className="h-5 w-5 text-gray-500" />;
    default:
      return <ClockIcon className="h-5 w-5 text-gray-500" />;
  }
};

const getStatusVariant = (status: string) => {
  switch (status) {
    case "Active":
      return "success" as const;
    case "Suspended":
      return "warning" as const;
    case "Pending":
      return "info" as const;
    case "Cancelled":
    case "Terminated":
      return "neutral" as const;
    default:
      return "neutral" as const;
  }
};

const formatDate = (dateString: string | undefined) => {
  if (!dateString) return "N/A";
  try {
    return format(new Date(dateString), "MMM d, yyyy");
  } catch {
    return "Invalid date";
  }
};

const getBillingCycleLabel = (cycle: string) => {
  const name = cycle.toLowerCase();
  const looksLikeActivation = name.includes("activation") || name.includes("setup");
  return looksLikeActivation ? "One-time" : cycle;
};

export const SubscriptionCard = forwardRef<HTMLDivElement, SubscriptionCardProps>(
  ({ subscription, variant = "list", showActions = true, onViewClick, className }, ref) => {
    const handleViewClick = () => {
      if (onViewClick) {
        onViewClick(subscription);
      }
    };

    if (variant === "grid") {
      return (
        <SubCard ref={ref} className={cn("hover:shadow-lg transition-all duration-200", className)}>
          <div className="space-y-4">
            {/* Header */}
            <div className="flex items-start justify-between">
              <div className="flex items-center space-x-3">
                {getStatusIcon(subscription.status)}
                <div className="min-w-0 flex-1">
                  <h3 className="text-lg font-semibold text-gray-900 truncate">
                    {subscription.productName}
                  </h3>
                  <p className="text-sm text-gray-500">Service ID: {subscription.serviceId}</p>
                </div>
              </div>
              <StatusPill
                label={subscription.status}
                variant={getStatusVariant(subscription.status)}
                size="sm"
              />
            </div>

            {/* Details */}
            <div className="grid grid-cols-2 gap-4 text-sm">
              <div>
                <p className="text-gray-500">Price</p>
                <p className="font-semibold text-gray-900">
                  {formatCurrency(subscription.amount, subscription.currency)}
                </p>
                <p className="text-xs text-gray-500">{getBillingCycleLabel(subscription.cycle)}</p>
              </div>
              <div>
                <p className="text-gray-500">Next Due</p>
                <div className="flex items-center space-x-1">
                  <CalendarIcon className="h-4 w-4 text-gray-400" />
                  <p className="font-medium text-gray-900">{formatDate(subscription.nextDue)}</p>
                </div>
              </div>
            </div>

            {/* Actions */}
            {showActions && (
              <div className="flex items-center justify-between pt-2 border-t border-gray-100">
                <p className="text-xs text-gray-500">
                  Created {formatDate(subscription.registrationDate)}
                </p>
                <div className="flex items-center space-x-2">
                  <Button
                    variant="outline"
                    size="sm"
                    onClick={handleViewClick}
                    rightIcon={<ArrowTopRightOnSquareIcon className="h-4 w-4" />}
                  >
                    View
                  </Button>
                </div>
              </div>
            )}
          </div>
        </SubCard>
      );
    }

    // List variant (default)
    return (
      <SubCard ref={ref} className={cn("hover:shadow-md transition-all duration-200", className)}>
        <div className="flex items-center justify-between">
          <div className="flex items-center space-x-4 min-w-0 flex-1">
            {getStatusIcon(subscription.status)}
            <div className="min-w-0 flex-1">
              <div className="flex items-center space-x-3">
                <h3 className="text-base font-semibold text-gray-900 truncate">
                  {subscription.productName}
                </h3>
                <StatusPill
                  label={subscription.status}
                  variant={getStatusVariant(subscription.status)}
                  size="sm"
                />
              </div>
              <p className="text-sm text-gray-500 mt-1">Service ID: {subscription.serviceId}</p>
            </div>
          </div>

          <div className="flex items-center space-x-6 text-sm">
            <div className="text-right">
              <p className="font-semibold text-gray-900">
                {formatCurrency(subscription.amount, "JPY")}
              </p>
              <p className="text-gray-500">{getBillingCycleLabel(subscription.cycle)}</p>
            </div>

            <div className="text-right">
              <div className="flex items-center space-x-1">
                <CalendarIcon className="h-4 w-4 text-gray-400" />
                <p className="text-gray-900">{formatDate(subscription.nextDue)}</p>
              </div>
              <p className="text-gray-500">Next due</p>
            </div>

            {showActions && (
              <div className="flex items-center space-x-2">
                <Button
                  variant="ghost"
                  size="sm"
                  onClick={handleViewClick}
                  rightIcon={<ArrowTopRightOnSquareIcon className="h-4 w-4" />}
                >
                  View
                </Button>
              </div>
            )}
          </div>
        </div>
      </SubCard>
    );
  }
);

SubscriptionCard.displayName = "SubscriptionCard";