"use client";

import Image from "next/image";
import { CheckCircle, XCircle, ExternalLink } from "lucide-react";
import { Button } from "@heroui/react";
import { useApp } from "@/contexts/AppContext";
import { ProductDetail } from "@/lib/api/fundmarket";

interface AssetCustodyVerificationProps {
  product: ProductDetail;
}

interface VerificationCardProps {
  icon: string;
  title: string;
  description: string;
  buttonText: string;
  reportUrl?: string;
}

function VerificationCard({ icon, title, description, buttonText, reportUrl }: VerificationCardProps) {
  return (
    <button
      className="bg-bg-surface dark:bg-gray-700 rounded-2xl border border-border-normal dark:border-gray-600 p-6 flex flex-col gap-4 text-left transition-all duration-200 hover:-translate-y-1 hover:shadow-lg hover:border-gray-300 dark:hover:border-gray-500 disabled:opacity-40 disabled:cursor-not-allowed disabled:hover:translate-y-0 disabled:hover:shadow-none w-full"
      onClick={() => reportUrl && window.open(reportUrl, "_blank")}
      disabled={!reportUrl}
    >
      <div className="flex items-start gap-4">
        <div className="w-5 h-5 flex-shrink-0">
          <Image src={icon} alt={title} width={20} height={20} />
        </div>
        <div className="flex flex-col gap-1">
          <h4 className="text-body-default font-bold text-text-primary dark:text-white">
            {title}
          </h4>
          <p className="text-caption-tiny font-regular text-[#9ca1af] dark:text-gray-400">
            {description}
          </p>
        </div>
      </div>
      <div className="flex items-center gap-2 mt-auto pt-2">
        <span className="text-[10px] font-bold leading-[150%] tracking-[0.01em] text-[#9ca1af] dark:text-gray-400">
          {buttonText}
        </span>
        <Image src="/components/product/component-118.svg" alt="" width={16} height={16} />
      </div>
    </button>
  );
}

function getInitials(name: string) {
  return name.split(/\s+/).map(w => w[0]).slice(0, 2).join("").toUpperCase();
}

function formatUSD(v: number) {
  return "$" + v.toLocaleString("en-US", { minimumFractionDigits: 2, maximumFractionDigits: 2 });
}

function formatMaturityDate(dateStr: string) {
  if (!dateStr) return "--";
  const d = new Date(dateStr);
  return d.toLocaleDateString("en-GB", { day: "2-digit", month: "short", year: "numeric" });
}

export default function AssetCustodyVerification({ product }: AssetCustodyVerificationProps) {
  const { t } = useApp();

  const custody = product.custody;
  const extra = custody?.additionalInfo ?? {};
  const assetType: string = extra.asset_type ?? "--";
  const maturityDate: string = extra.maturity_date ? formatMaturityDate(extra.maturity_date as string) : "--";
  const daysRemaining: number | null = typeof extra.days_remaining === "number" ? extra.days_remaining : null;
  const custodyValueUSD: number = typeof extra.custody_value_usd === "number" ? extra.custody_value_usd : 0;
  const verificationStatus: string = typeof extra.verification_status === "string" ? extra.verification_status : "Unverified";
  const isVerified = verificationStatus.toLowerCase() === "verified";
  const auditReportUrl = custody?.auditReportUrl || "";

  // 动态获取 verification 区域的链接，按 displayOrder 排序
  const verificationLinks = (product.productLinks ?? [])
    .filter((l) => l.displayArea === 'verification' || l.displayArea === 'both')
    .sort((a, b) => a.displayOrder - b.displayOrder);

  // 循环使用的图标列表
  const ICONS = [
    "/components/product/component-117.svg",
    "/components/product/component-119.svg",
    "/components/product/component-121.svg",
  ];

  // Get attestation reports for Independent Verifications
  const attestationReports = (product.auditReports ?? []).filter(
    (r) => r.reportType === "attestation"
  );

  return (
    <div className="flex flex-col gap-8 w-full">
      {/* Header */}
      <div className="flex flex-col gap-2">
        <h2 className="text-body-large font-bold text-text-primary dark:text-white">
          {t("custody.title")}
        </h2>
        <p className="text-body-small font-regular text-[#9ca1af] dark:text-gray-400">
          {t("custody.description")}
        </p>
      </div>

      {/* Holdings Table Card */}
      <div className="bg-bg-surface dark:bg-gray-800 rounded-3xl border border-border-gray dark:border-gray-700 p-4 md:p-8 flex flex-col gap-6">
        {/* Table Header */}
        <div className="flex flex-col gap-4 pb-6 border-b border-border-gray dark:border-gray-700">
          <h3 className="text-body-default font-bold text-text-primary dark:text-white">
            {t("custody.underlyingHoldings")}
          </h3>
          <div className="flex flex-col md:flex-row md:items-center md:justify-between gap-2">
            <p className="text-caption-tiny font-regular text-[#9ca1af] dark:text-gray-400">
              {t("custody.verifiedBy")} {custody?.auditorName ?? "--"}
            </p>
            {custody?.lastAuditDate && (
              <div className="flex items-center gap-2">
                <Image src="/components/product/component-115.svg" alt="" width={16} height={16} />
                <span className="text-caption-tiny font-medium text-[#9ca1af] dark:text-gray-400">
                  {t("custody.lastUpdated")}: {custody.lastAuditDate}
                </span>
              </div>
            )}
          </div>
        </div>

        {/* ── 移动端：卡片化布局 ── */}
        <div className="md:hidden flex flex-col gap-4">
          {/* Custodian 卡片 */}
          <div className="flex items-center gap-3 p-4 bg-gray-50 dark:bg-gray-700/50 rounded-xl">
            <div
              className="w-10 h-10 rounded-full flex items-center justify-center flex-shrink-0"
              style={{ background: "linear-gradient(135deg, rgba(255, 137, 4, 1) 0%, rgba(245, 73, 0, 1) 100%)" }}
            >
              <span className="text-sm font-bold text-white">
                {custody?.custodianName ? getInitials(custody.custodianName) : "--"}
              </span>
            </div>
            <div className="flex flex-col">
              <span className="text-body-small font-bold text-text-primary dark:text-white">{custody?.custodianName ?? "--"}</span>
              <span className="text-caption-tiny font-regular text-[#9ca1af] dark:text-gray-400">{custody?.custodyType ?? "--"}</span>
            </div>
          </div>

          {/* 信息网格：2列 */}
          <div className="grid grid-cols-2 gap-3">
            {/* Asset Type */}
            <div className="p-4 bg-gray-50 dark:bg-gray-700/50 rounded-xl">
              <span className="text-caption-tiny font-medium text-[#9ca1af] dark:text-gray-400 block mb-1">{t("custody.assetType")}</span>
              <span className="text-body-small font-bold text-text-primary dark:text-white">{assetType}</span>
            </div>
            {/* Maturity */}
            <div className="p-4 bg-gray-50 dark:bg-gray-700/50 rounded-xl">
              <span className="text-caption-tiny font-medium text-[#9ca1af] dark:text-gray-400 block mb-1">{t("custody.maturity")}</span>
              <span className="text-body-small font-bold text-text-primary dark:text-white">{maturityDate}</span>
              {daysRemaining !== null && (
                daysRemaining < 0
                  ? <span className="text-caption-tiny font-regular text-red-400 block">{t("custody.expired")}</span>
                  : <span className="text-caption-tiny font-regular text-[#9ca1af] dark:text-gray-400 block">({daysRemaining} {t("custody.days")})</span>
              )}
            </div>
            {/* Value USD */}
            <div className="p-4 bg-gray-50 dark:bg-gray-700/50 rounded-xl">
              <span className="text-caption-tiny font-medium text-[#9ca1af] dark:text-gray-400 block mb-1">{t("custody.valueUSD")}</span>
              <span className="text-body-small font-bold text-text-primary dark:text-white">
                {custodyValueUSD > 0 ? formatUSD(custodyValueUSD) : "--"}
              </span>
            </div>
            {/* Status */}
            <div className="p-4 bg-gray-50 dark:bg-gray-700/50 rounded-xl">
              <span className="text-caption-tiny font-medium text-[#9ca1af] dark:text-gray-400 block mb-1">{t("custody.status")}</span>
              <div className={`inline-flex rounded-full px-3 py-1 items-center gap-1.5 ${isVerified ? "bg-[#f2fcf7] dark:bg-green-900/20" : "bg-[#f9fafb] dark:bg-gray-600"}`}>
                {isVerified ? <CheckCircle size={10} className="text-[#10b981] dark:text-green-400" /> : <XCircle size={10} className="text-[#9ca1af] dark:text-gray-400" />}
                <span className={`text-[10px] font-bold ${isVerified ? "text-[#10b981] dark:text-green-400" : "text-[#9ca1af] dark:text-gray-400"}`}>
                  {verificationStatus}
                </span>
              </div>
            </div>
          </div>
          {auditReportUrl && (
            <Button
              as="a"
              href={auditReportUrl}
              target="_blank"
              rel="noopener noreferrer"
              size="sm"
              variant="flat"
              color="success"
              startContent={<ExternalLink size={14} />}
            >
              {t("custody.viewReports")}
            </Button>
          )}

          {/* Total Value */}
          <div className="flex items-center justify-between p-4 bg-gray-50 dark:bg-gray-700/50 rounded-xl">
            <span className="text-body-small font-bold text-text-primary dark:text-white">{t("custody.totalValue")}</span>
            <span className="text-body-default font-bold text-text-primary dark:text-white">
              {custodyValueUSD > 0 ? formatUSD(custodyValueUSD) : "--"}
            </span>
          </div>
        </div>

        {/* ── 桌面端：表格布局 ── */}
        <div className="hidden md:block">
          {/* Table Header Row */}
          <div className="grid grid-cols-6 gap-4 pb-4 border-b border-border-gray dark:border-gray-700">
            <div className="text-caption-tiny font-bold uppercase tracking-wider text-[#9ca1af] dark:text-gray-400 text-center">{t("custody.custodian")}</div>
            <div className="text-caption-tiny font-bold uppercase tracking-wider text-[#9ca1af] dark:text-gray-400 text-center">{t("custody.assetType")}</div>
            <div className="text-caption-tiny font-bold uppercase tracking-wider text-[#9ca1af] dark:text-gray-400 text-center">{t("custody.maturity")}</div>
            <div className="text-caption-tiny font-bold uppercase tracking-wider text-[#9ca1af] dark:text-gray-400 text-center">{t("custody.valueUSD")}</div>
            <div className="text-caption-tiny font-bold uppercase tracking-wider text-[#9ca1af] dark:text-gray-400 text-center">{t("custody.status")}</div>
            <div className="text-caption-tiny font-bold uppercase tracking-wider text-[#9ca1af] dark:text-gray-400 text-center">{t("custody.viewReports")}</div>
          </div>

          {/* Table Body Row */}
          <div className="grid grid-cols-6 gap-4 py-6">
            <div className="flex items-center justify-center gap-3">
              <div
                className="w-8 h-8 rounded-full flex items-center justify-center flex-shrink-0"
                style={{ background: "linear-gradient(135deg, rgba(255, 137, 4, 1) 0%, rgba(245, 73, 0, 1) 100%)" }}
              >
                <span className="text-[13.5px] font-bold leading-[19px] text-white tracking-tight">
                  {custody?.custodianName ? getInitials(custody.custodianName) : "--"}
                </span>
              </div>
              <div className="flex flex-col">
                <span className="text-body-small font-bold text-text-primary dark:text-white">{custody?.custodianName ?? "--"}</span>
                <span className="text-caption-tiny font-regular text-[#9ca1af] dark:text-gray-400">{custody?.custodyType ?? "--"}</span>
              </div>
            </div>
            <div className="flex items-center justify-center">
              <span className="text-body-small font-medium text-text-primary dark:text-white">{assetType}</span>
            </div>
            <div className="flex flex-col items-center justify-center">
              <span className="text-body-small font-medium text-text-primary dark:text-white">{maturityDate}</span>
              {daysRemaining !== null && (
                daysRemaining < 0
                  ? <span className="text-caption-tiny font-regular text-red-400">{t("custody.expired")}</span>
                  : <span className="text-caption-tiny font-regular text-[#9ca1af] dark:text-gray-400">({daysRemaining} {t("custody.days")})</span>
              )}
            </div>
            <div className="flex items-center justify-center">
              <span className="text-body-small font-medium text-text-primary dark:text-white">
                {custodyValueUSD > 0 ? formatUSD(custodyValueUSD) : "--"}
              </span>
            </div>
            <div className="flex items-center justify-center">
              <div className={`rounded-full px-3 py-1.5 inline-flex items-center gap-2 ${isVerified ? "bg-[#f2fcf7] dark:bg-green-900/20" : "bg-[#f9fafb] dark:bg-gray-700"}`}>
                {isVerified ? <CheckCircle size={12} className="text-[#10b981] dark:text-green-400" /> : <XCircle size={12} className="text-[#9ca1af] dark:text-gray-400" />}
                <span className={`text-[10px] font-bold leading-[150%] ${isVerified ? "text-[#10b981] dark:text-green-400" : "text-[#9ca1af] dark:text-gray-400"}`}>
                  {verificationStatus}
                </span>
              </div>
            </div>
            <div className="flex items-center justify-center">
              {auditReportUrl && (
                <Button
                  as="a"
                  href={auditReportUrl}
                  target="_blank"
                  rel="noopener noreferrer"
                  size="sm"
                  variant="flat"
                  color="success"
                  startContent={<ExternalLink size={14} />}
                >
                  {t("custody.viewReports")}
                </Button>
              )}
            </div>
          </div>

          {/* Table Footer Row */}
          <div className="grid grid-cols-6 gap-4 pt-6 border-t border-border-gray dark:border-gray-700">
            <div className="col-span-3 flex items-center justify-center">
              <span className="text-body-small font-bold text-text-primary dark:text-white">{t("custody.totalValue")}</span>
            </div>
            <div className="col-span-3 flex items-center justify-center">
              <span className="text-body-default font-bold text-text-primary dark:text-white">
                {custodyValueUSD > 0 ? formatUSD(custodyValueUSD) : "--"}
              </span>
            </div>
          </div>
        </div>
      </div>

      {/* Verification Cards Row */}
      <div className="flex flex-col md:flex-row gap-6 pt-6">
        {/* 验证卡片：移动端1列，桌面端3列 */}
        {verificationLinks.length > 0 && (
          <div className="flex-1 grid grid-cols-1 md:grid-cols-3 gap-4 md:gap-6">
            {verificationLinks.map((link, idx) => (
              <VerificationCard
                key={idx}
                icon={ICONS[idx % ICONS.length]}
                title={link.linkText}
                description={link.description || ""}
                buttonText={t("custody.viewReports")}
                reportUrl={link.linkUrl}
              />
            ))}
          </div>
        )}

        {/* Independent Verifications：移动端全宽，桌面端固定宽度 */}
        <div className="w-full md:w-[calc(25%-18px)] md:shrink-0 rounded-2xl border bg-[#f9fafb] dark:bg-gray-700 border-[#e5e7eb] dark:border-gray-600 p-6 flex flex-col">
          <div className="flex flex-col gap-2">
            <h3 className="text-body-default font-bold text-text-primary dark:text-white">
              {t("custody.independentVerifications")}
            </h3>
            <p className="text-body-small font-regular text-[#9ca1af] dark:text-gray-400">
              {t("custody.independentDesc")}
            </p>
          </div>

          <div className="flex flex-col gap-2 mt-6">
            {attestationReports.length > 0 ? (
              attestationReports.map((report, idx) => (
                <button
                  key={idx}
                  className="rounded-2xl border bg-white dark:bg-gray-800 border-[#e5e7eb] dark:border-gray-600 p-4 flex items-center justify-between text-left transition-all duration-200 hover:-translate-y-0.5 hover:shadow-md hover:border-gray-300 dark:hover:border-gray-500"
                  onClick={() => report.reportUrl && window.open(report.reportUrl, "_blank")}
                  disabled={!report.reportUrl}
                >
                  <div className="flex flex-col gap-0.5">
                    <span className="text-body-small font-bold text-text-primary dark:text-white">
                      {report.reportTitle}
                    </span>
                    <span className="text-caption-tiny font-regular text-[#9ca1af] dark:text-gray-400">
                      {report.reportDate}
                    </span>
                  </div>
                  <Image src="/components/product/component-123.svg" alt="" width={24} height={24} />
                </button>
              ))
            ) : (
              <p className="text-caption-tiny font-regular text-[#9ca1af] dark:text-gray-400">
                {t("custody.noReports")}
              </p>
            )}
          </div>
        </div>
      </div>
    </div>
  );
}