"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import Link from "next/link";
import { ChevronRightIcon, WalletIcon } from "lucide-react";
import type { BankAccount, Resource } from "@/payload-types";
import { Button } from "@/components/ui/button";
import { formatAmount } from "@/lib/banking/format";
import {
  type AccountStatus,
  accountStatusBase,
  accountStatusClass,
  formatLastActivity,
} from "@/lib/banking/ui";
import { BankTransactionDialog } from "@/components/frontend/banking/BankTransactionDialog";
import { ensureMyAccount } from "@/app/(frontend)/logistics/banking/actions";

interface WalletHeroProps {
  account: BankAccount | null;
  currentUser: { id: number; username: string; displayName?: string } | null;
  currencyResource: Resource | null;
}

// Shared terminal-aesthetic class for small uppercase mono labels in the hero.
const labelCls = "font-mono text-[10px] uppercase tracking-wider text-muted-foreground";

export function WalletHero({ account, currentUser, currencyResource }: WalletHeroProps) {
  const router = useRouter();
  const [initializing, setInitializing] = useState(false);
  const [initError, setInitError] = useState<string | null>(null);

  async function handleInitialize() {
    setInitializing(true);
    setInitError(null);
    const res = await ensureMyAccount();
    if (res.success) {
      router.push(`/logistics/banking/${res.data}`);
      router.refresh();
    } else {
      setInitError(res.error ?? "Failed to initialize wallet.");
      setInitializing(false);
    }
  }

  // Empty state — terminal-flavored "WALLET NOT INITIALIZED"
  if (!account || !currentUser) {
    return (
      <section className="rounded-lg border border-blue-500/25 bg-blue-500/[0.03] p-5">
        <div className="flex flex-col gap-3">
          <div className="flex items-center gap-2">
            <WalletIcon className="size-4 text-blue-400/80" />
            <span className={labelCls}>&lt;OPERATOR WALLET&gt;</span>
          </div>
          <p className="font-mono text-sm text-muted-foreground/80">{"> WALLET NOT INITIALIZED"}</p>
          <p className="font-mono text-xs text-muted-foreground/60">
            Run initialization to provision your personal account.
          </p>
          {initError && (
            <p className="font-mono text-xs text-red-400">
              {"> ERROR: "}
              {initError}
            </p>
          )}
          <div>
            <Button
              size="sm"
              onClick={handleInitialize}
              disabled={initializing}
              className="font-mono text-xs uppercase tracking-wider"
            >
              {initializing ? "> INITIALIZING…" : "> INITIALIZE"}
            </Button>
          </div>
        </div>
      </section>
    );
  }

  const accountId = account.id;
  const lastActivity = formatLastActivity(account.updatedAt);
  const currency = typeof account.currency === "object" ? account.currency : currencyResource;
  const operatorLabel = currentUser.displayName ?? currentUser.username;
  const statusKey = (account.status ?? "open") as AccountStatus;

  // otherAccounts requires names for the transfer destination select.
  // We only know this wallet here; the BankTransactionDialog receives an empty
  // list — transfer mode will prompt the user to use the account detail page.
  // Deposits/withdrawals work standalone on the hero.
  const otherAccounts: { id: number; name: string }[] = [];

  return (
    <section className="rounded-lg border border-blue-500/25 bg-blue-500/[0.03] p-5">
      <div className="flex flex-col gap-4">
        <div className="flex flex-wrap items-start justify-between gap-2">
          <div className="flex flex-col gap-1">
            <div className="flex items-center gap-2">
              <WalletIcon className="size-4 text-blue-400/80" />
              <span className={labelCls}>&lt;OPERATOR WALLET&gt;</span>
            </div>
            <div className="flex items-center gap-2">
              <span className="font-mono text-sm text-muted-foreground/90">@{operatorLabel}</span>
              <span
                className={`${accountStatusBase} ${accountStatusClass[statusKey] ?? accountStatusClass.open}`}
              >
                {statusKey}
              </span>
            </div>
          </div>
          <span className="font-mono text-[10px] uppercase tracking-wider text-muted-foreground/50">
            ID #{accountId.toString().padStart(6, "0")}
          </span>
        </div>

        <div className="flex flex-col gap-1">
          <p className="text-4xl md:text-5xl font-bold font-mono tracking-tight">
            {formatAmount(account.balance ?? 0, currency)}
          </p>
          <p className="font-mono text-[10px] uppercase tracking-wider text-muted-foreground/60">
            LAST ACTIVITY {lastActivity}
          </p>
        </div>

        <div className="flex flex-wrap items-center gap-2 pt-3 border-t border-blue-500/15">
          <BankTransactionDialog accountId={accountId} otherAccounts={otherAccounts} />
          <Link href={`/logistics/banking/${accountId}`} prefetch={false}>
            <Button
              size="sm"
              variant="outline"
              className="font-mono text-xs uppercase tracking-wider"
            >
              {"> LEDGER"}
              <ChevronRightIcon className="size-3.5" />
            </Button>
          </Link>
        </div>
      </div>
    </section>
  );
}