// [nexus] Summary screen for onboarding wizard step 5 — read-only review before starting
import type { HardwareInfo, HardwareTier, NexusMode } from "@/api/hardware";
import { Button } from "@/components/ui/button";

interface OnboardingSummaryStepProps {
  hardwareInfo: HardwareInfo | undefined;
  selectedMode: NexusMode;
  providerLabel: string;
  rootDir: string;
  loading: boolean;
  error: string | null;
  onStartChat: () => void;
  onBack: () => void;
}

interface SummaryRowProps {
  label: string;
  value: string;
  mono?: boolean;
}

function SummaryRow({ label, value, mono }: SummaryRowProps) {
  return (
    <div className="flex items-start justify-between gap-4">
      <span className="text-sm text-muted-foreground shrink-0">{label}</span>
      <span className={mono ? "font-mono text-sm text-right" : "text-sm text-right"}>{value}</span>
    </div>
  );
}

const HARDWARE_TIER_LABELS: Record<HardwareTier, string> = {
  gpu: "GPU",
  apple_silicon: "Apple Silicon",
  cpu_only: "CPU Only",
};

const MODE_LABELS: Record<NexusMode, string> = {
  personal_ai: "Personal AI Assistant",
  project_builder: "Project Builder",
  both: "Both (recommended)",
};

export function OnboardingSummaryStep({
  hardwareInfo,
  selectedMode,
  providerLabel,
  rootDir,
  loading,
  error,
  onStartChat,
  onBack,
}: OnboardingSummaryStepProps) {
  const hardwareLabel = hardwareInfo
    ? (HARDWARE_TIER_LABELS[hardwareInfo.hardwareTier] ?? "Unknown")
    : "Unknown";

  const modeLabel = MODE_LABELS[selectedMode];

  return (
    <div className="flex flex-col gap-6">
      <div className="flex flex-col gap-2 text-center">
        <h1 className="text-2xl font-semibold tracking-tight">Ready to go</h1>
        <p className="text-sm text-muted-foreground">Review your setup before starting.</p>
      </div>

      {/* Summary card */}
      <div className="rounded-lg border border-border p-4 flex flex-col gap-3">
        <SummaryRow label="Hardware" value={hardwareLabel} />
        <SummaryRow label="Mode" value={modeLabel} />
        <SummaryRow label="Provider" value={providerLabel} />
        {rootDir && <SummaryRow label="Root directory" value={rootDir} mono />}
      </div>

      {/* Error message */}
      {error && (
        <p className="text-sm text-destructive bg-destructive/10 rounded-md px-3 py-2">
          {error}
        </p>
      )}

      {/* Actions */}
      <div className="flex flex-col gap-2">
        <Button
          type="button"
          onClick={onStartChat}
          disabled={loading}
          className="w-full"
        >
          {loading ? (
            <span className="flex items-center gap-2">
              <svg
                className="h-4 w-4 animate-spin"
                viewBox="0 0 24 24"
                fill="none"
                aria-hidden="true"
              >
                <circle
                  className="opacity-25"
                  cx="12"
                  cy="12"
                  r="10"
                  stroke="currentColor"
                  strokeWidth="4"
                />
                <path
                  className="opacity-75"
                  fill="currentColor"
                  d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"
                />
              </svg>
              Setting up...
            </span>
          ) : (
            "Start chatting"
          )}
        </Button>
        <Button
          type="button"
          variant="ghost"
          onClick={onBack}
          disabled={loading}
          className="w-full"
        >
          Back
        </Button>
      </div>
    </div>
  );
}