"use client";

import { useState } from "react";
import type { Asset, MarketListing, MarketNegotiation } from "@/payload-types";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
  DialogTrigger,
} from "@/components/ui/dialog";
import { Collapsible, CollapsibleContent, CollapsibleTrigger } from "@/components/ui/collapsible";
import { formatAmount } from "@/lib/banking/format";
import { buildChatBubbles } from "@/lib/market/chatBubbles";
import { ChatBubbleList } from "@/components/frontend/market/ChatBubbleList";
import { HistoryIcon, ChevronDownIcon } from "lucide-react";
import { cn } from "@/lib/utils";

const STATUS_LABELS: Record<string, string> = {
  open: "Open",
  accepted: "Accepted",
  rejected: "Rejected",
  closed: "Closed",
  cancelled: "Cancelled",
  expired: "Expired",
};

function listingOf(negotiation: MarketNegotiation): MarketListing | null {
  return typeof negotiation.listing === "object" && negotiation.listing
    ? (negotiation.listing as MarketListing)
    : null;
}

function assetName(listing: MarketListing | null): string {
  if (!listing) return "Unknown item";
  const asset = listing.asset as Asset;
  return typeof asset === "object" && asset ? asset.name : `Asset #${listing.asset}`;
}

function counterpartyLabel(negotiation: MarketNegotiation, role: "buyer" | "seller"): string {
  if (role === "seller") {
    const listing = listingOf(negotiation);
    if (listing?.isAutoGenerated) {
      const npc = listing.npc as unknown;
      if (typeof npc === "object" && npc && "name" in (npc as object)) {
        return (npc as { name: string }).name;
      }
      return "Market vendor";
    }
    const seller = listing?.seller as unknown;
    if (typeof seller === "object" && seller && "username" in (seller as object)) {
      return (
        (seller as { username?: string; displayName?: string }).displayName ||
        (seller as { username?: string }).username ||
        "Seller"
      );
    }
    return "Seller";
  }
  const buyer = negotiation.buyer as unknown;
  if (typeof buyer === "object" && buyer && "username" in (buyer as object)) {
    return (buyer as { username?: string }).username ?? "Buyer";
  }
  return "Buyer";
}

function HistoryRow({
  negotiation,
  role,
  currencyLabel,
}: {
  negotiation: MarketNegotiation;
  role: "buyer" | "seller";
  currencyLabel: string | null;
}) {
  const [expanded, setExpanded] = useState(false);
  const listing = listingOf(negotiation);
  const fmt = (n: number) => formatAmount(n, { name: currencyLabel ?? undefined });

  const buyerLabel = role === "buyer" ? "You" : counterpartyLabel(negotiation, "buyer");
  const sellerLabel = role === "seller" ? "You" : counterpartyLabel(negotiation, "seller");
  const counterparty = role === "buyer" ? sellerLabel : buyerLabel;
  const date = new Date(negotiation.updatedAt).toLocaleDateString();
  const isOpen = negotiation.status === "open";

  return (
    <Collapsible open={expanded} onOpenChange={setExpanded} className="rounded-md border">
      <CollapsibleTrigger className="flex w-full items-center justify-between gap-3 px-3 py-2.5 text-left">
        <div className="flex min-w-0 flex-col gap-0.5">
          <span className="truncate text-sm font-medium">{assetName(listing)}</span>
          <span className="text-xs text-muted-foreground">
            {counterparty} · {date}
          </span>
        </div>
        <div className="flex shrink-0 items-center gap-2">
          <span className="font-mono text-sm">{fmt(negotiation.amount ?? 0)}</span>
          <Badge variant={isOpen ? "default" : "secondary"}>
            {STATUS_LABELS[negotiation.status] ?? negotiation.status}
          </Badge>
          <ChevronDownIcon
            className={cn(
              "size-4 text-muted-foreground transition-transform",
              expanded && "rotate-180",
            )}
          />
        </div>
      </CollapsibleTrigger>
      {listing && (
        <CollapsibleContent className="border-t">
          <ChatBubbleList
            bubbles={buildChatBubbles(negotiation, listing, currencyLabel)}
            buyerLabel={buyerLabel}
            sellerLabel={sellerLabel}
            maxHeight="max-h-64"
          />
        </CollapsibleContent>
      )}
    </Collapsible>
  );
}

interface NegotiationHistoryDialogProps {
  negotiations: MarketNegotiation[];
  currentUserId: number;
  currencyLabel: string | null;
}

export function NegotiationHistoryDialog({
  negotiations,
  currentUserId,
  currencyLabel,
}: NegotiationHistoryDialogProps) {
  const [open, setOpen] = useState(false);

  const sorted = [...negotiations].sort(
    (a, b) => new Date(b.updatedAt).getTime() - new Date(a.updatedAt).getTime(),
  );

  return (
    <Dialog open={open} onOpenChange={setOpen}>
      <DialogTrigger asChild>
        <Button size="sm" variant="outline">
          <HistoryIcon className="size-4" />
          History
        </Button>
      </DialogTrigger>
      <DialogContent className="sm:max-w-xl">
        <DialogHeader>
          <DialogTitle>Negotiation history</DialogTitle>
          <DialogDescription>
            Your offers, counters and vendor conversations. Tap a row to expand the chat.
          </DialogDescription>
        </DialogHeader>
        <div className="flex max-h-[60vh] flex-col gap-2 overflow-y-auto pr-1">
          {sorted.length === 0 ? (
            <p className="text-sm text-muted-foreground italic">No negotiations yet.</p>
          ) : (
            sorted.map((negotiation) => {
              const buyerId =
                typeof negotiation.buyer === "object" && negotiation.buyer
                  ? negotiation.buyer.id
                  : (negotiation.buyer as number);
              const role: "buyer" | "seller" = buyerId === currentUserId ? "buyer" : "seller";
              return (
                <HistoryRow
                  key={negotiation.id}
                  negotiation={negotiation}
                  role={role}
                  currencyLabel={currencyLabel}
                />
              );
            })
          )}
        </div>
        <DialogFooter>
          <Button variant="outline" onClick={() => setOpen(false)}>
            Close
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}