"use client";

import { Handle, Position, type Node, type NodeProps } from "@xyflow/react";
import { TriangleAlertIcon } from "lucide-react";
import React from "react";

import type { TreeTech } from "./types";

export type TechNodeData = {
  tech: TreeTech;
  categoryName: string | null;
  refLabel: string;
  hasWarning: boolean;
  connectable: boolean;
};

export type TechNodeModel = Node<TechNodeData, "techCard">;

const STATUS_LABELS: Record<string, { label: string; className: string }> = {
  in_progress: { label: "In Progress", className: "text-blue-400" },
  ready_for_review: { label: "Ready for Review", className: "text-amber-400" },
  approved: { label: "Approved", className: "text-emerald-400" },
  rejected: { label: "Rejected", className: "text-red-400" },
  revision_requested: { label: "Revision Requested", className: "text-orange-400" },
};

function CornerBrackets() {
  const base = "pointer-events-none absolute size-2 border-white/25";
  return (
    <div aria-hidden className="pointer-events-none absolute inset-1">
      <span className={`${base} top-0 left-0 border-t border-l`} />
      <span className={`${base} top-0 right-0 border-t border-r`} />
      <span className={`${base} bottom-0 left-0 border-b border-l`} />
      <span className={`${base} right-0 bottom-0 border-r border-b`} />
    </div>
  );
}

/**
 * Technology card node: tactical dossier styling (squared corners,
 * classification strip, corner brackets, mono readouts).
 */
export function TechNodeCard({ data, selected }: NodeProps<TechNodeModel>) {
  const { tech, categoryName, refLabel, hasWarning, connectable } = data;
  const status = STATUS_LABELS[tech.approvalStatus] ?? {
    label: tech.approvalStatus,
    className: "text-white/60",
  };

  return (
    <div
      data-testid={`tech-node-${tech.id}`}
      className="relative h-full w-full"
    >
      {/* Clipped card surface (the handles live outside this box) */}
      <div
        className={`flex h-full w-full flex-col overflow-hidden rounded-none border bg-black/60 backdrop-blur-sm transition-colors ${
          selected
            ? "border-[#22d3ee]/70 shadow-[0_0_18px_rgba(34,211,238,0.15)]"
            : "border-white/15 hover:border-white/40"
        }`}
      >
        <CornerBrackets />

      {/* Classification strip */}
      <div className="flex shrink-0 items-center justify-between gap-2 border-b border-white/15 bg-black/50 px-3.5 py-1.5">
        <span className="truncate font-mono text-[8px] tracking-widest text-white/50 uppercase">
          TECH // {categoryName ?? "UNFILED"}
        </span>
        <span className="shrink-0 font-mono text-[8px] tracking-widest text-white/40 uppercase">
          {refLabel}
        </span>
      </div>

      {/* Body */}
      <div className="flex-1 px-3.5 py-2.5">
        <div className="flex items-start justify-between gap-2">
          <span className="line-clamp-2 text-sm leading-snug font-semibold text-white">
            {tech.name}
          </span>
          {hasWarning ? (
            <TriangleAlertIcon
              className="mt-0.5 size-3.5 shrink-0 text-amber-400"
              aria-label="Timeline warning"
              data-testid={`tech-warning-${tech.id}`}
            />
          ) : null}
        </div>
        <div className="mt-2 flex items-center gap-2">
          <span className="rounded-sm border border-white/15 px-1 py-px font-mono text-[8px] tracking-widest text-white/60 uppercase">
            {tech.type}
          </span>
          <span
            className={`font-mono text-[9px] tracking-widest uppercase ${status.className}`}
          >
            {status.label}
          </span>
        </div>
      </div>

      {/* Footer readout */}
      <div className="flex shrink-0 items-center justify-between border-t border-white/15 bg-black/60 px-3.5 py-1.5">
        <span className="font-mono text-[9px] tracking-widest text-white/50 uppercase tabular-nums">
          {tech.type === "asset" ? "UNLOCK" : "UPGRADE"}
        </span>
        <span className="font-mono text-[9px] tracking-widest text-white/35 uppercase">
          {tech.categoryId ? "BAND" : "ZONE"}
        </span>
      </div>
      </div>

      <Handle
        type="target"
        position={Position.Left}
        className="!bg-white/45 hover:!bg-[#22d3ee]"
        style={{ width: 11, height: 11, border: "1px solid rgba(0,0,0,0.6)" }}
        isConnectable={connectable}
      />
      <Handle
        type="source"
        position={Position.Right}
        className="!bg-white/45 hover:!bg-[#22d3ee]"
        style={{ width: 11, height: 11, border: "1px solid rgba(0,0,0,0.6)" }}
        isConnectable={connectable}
      />
    </div>
  );
}