"use client";

import { Button } from "@/components/ui/button";
import { Loader2, Inbox, PackageOpen } from "lucide-react";
import { formatCurrency } from "@/lib/pb-helpers";
import type { QuoteItem } from "@/lib/types";

/**
 * Inline mini-list of a quote's items, shown when a list row is
 * expanded. Purely a renderer — the host page owns the fetch/cache
 * (lazy-populated on first expand, kept warm across collapse/re-open).
 * Shared by `/quotes` and `/quotes/archive` so both list views get the
 * same "peek at items without leaving the list" affordance.
 */
export function QuoteItemsExpanded({
  items,
  loading,
  onOpen,
}: {
  items: QuoteItem[] | undefined;
  loading: boolean;
  onOpen: () => void;
}) {
  if (loading) {
    return (
      <div className="px-4 py-6 flex items-center justify-center gap-2 text-sm text-muted-foreground">
        <Loader2 className="h-4 w-4 animate-spin" />
        Loading items…
      </div>
    );
  }
  if (!items) {
    return (
      <div className="px-4 py-4 text-sm text-muted-foreground">
        Click again to retry loading items.
      </div>
    );
  }
  if (items.length === 0) {
    return (
      <div className="px-4 py-6 flex flex-col items-center justify-center gap-2 text-sm text-muted-foreground">
        <Inbox className="h-6 w-6 opacity-60" />
        No items on this quote yet.
        <Button variant="link" size="sm" onClick={onOpen} className="h-auto p-0">
          Open quote to add items
        </Button>
      </div>
    );
  }

  const subtotal = items.reduce(
    (sum, it) => sum + (Number(it.selling_price) || 0) * (Number(it.quantity) || 1),
    0
  );

  return (
    <div className="px-4 py-3">
      <div className="flex items-center justify-between mb-2">
        <div className="text-xs font-semibold text-muted-foreground uppercase tracking-wider flex items-center gap-1.5">
          <PackageOpen className="h-3.5 w-3.5" />
          Items ({items.length})
        </div>
        <Button variant="link" size="sm" onClick={onOpen} className="h-auto p-0 text-xs">
          Open full quote →
        </Button>
      </div>
      <ul className="divide-y divide-border/60 rounded-md border bg-background">
        {items.map((it) => (
          <li key={it.id} className="px-3 py-2 flex items-start gap-3 text-sm">
            {/*
             * `items-start` (vs the default `items-center`) so the right
             * price column anchors to the top of the row regardless of
             * whether the description is one line, two lines, or more.
             * Without this, a single-line "no price yet" placeholder
             * floats in the vertical middle of mixed rows where other
             * items have a 2-line price stack — feels orphaned.
             */}
            <div className="flex-1 min-w-0">
              {/* Long descriptions wrap inside the row width instead
                  of being clipped to one line. `whitespace-pre-wrap`
                  preserves the supplier's line breaks (POs sometimes
                  ship with multiline notes), `break-words` lets very
                  long unbroken tokens wrap at any character instead
                  of forcing horizontal scroll. */}
              <div className="font-medium whitespace-pre-wrap break-words">
                {it.description || "(no description)"}
              </div>
              <div className="text-xs text-muted-foreground mt-0.5 flex flex-wrap gap-x-3">
                <span>
                  Qty: <span className="font-medium tabular-nums text-foreground">{it.quantity || 1}</span>
                </span>
                {it.expand?.supplier?.suppliername && (
                  <span>Supplier: <span className="text-foreground">{it.expand.supplier.suppliername}</span></span>
                )}
                {/*
                 * Pair with the "processed" branch above: green when the
                 * item is priced, warm amber when it isn't. We use `text-warn`
                 * (the amber itself), NOT `text-warn-foreground` — the
                 * foreground token is intentionally dark because it's
                 * designed to sit on a warn-tinted background (see the
                 * FollowUpChip). As a standalone span with no background
                 * it renders near-black on the dark canvas and disappears.
                 * `text-warn` keeps the same semantic pair (success ↔ warn)
                 * while reading on both light and dark themes.
                 */}
                {it.is_processed ? (
                  <span className="text-success">processed</span>
                ) : (
                  <span className="text-warn">not processed</span>
                )}
              </div>
            </div>
            <div className="text-right shrink-0 tabular-nums">
              {it.selling_price ? (
                <>
                  <div className="font-medium">{formatCurrency(it.selling_price)}</div>
                  <div className="text-xs text-muted-foreground">
                    × {it.quantity || 1} = {formatCurrency((it.selling_price || 0) * (it.quantity || 1))}
                  </div>
                </>
              ) : (
                <span className="text-xs text-muted-foreground">no price yet</span>
              )}
            </div>
          </li>
        ))}
      </ul>
      {subtotal > 0 && (
        <div className="flex justify-end mt-2 text-xs text-muted-foreground">
          <span>Subtotal: <span className="font-semibold text-foreground">{formatCurrency(subtotal)}</span></span>
        </div>
      )}
    </div>
  );
}