"use client";

import { useI18n } from "@/i18n";
import { getNodeOutputMediaType, SINGLE_INPUT_HANDLE_ID } from "@/utils/nodeHandles";
import type { EaseCurveNodeData, VideoStitchNodeData, WorkflowEdge, WorkflowNode } from "@/types";

interface ComposerProcessBodyProps {
  node: WorkflowNode | null | undefined;
  nodes: WorkflowNode[];
  edges: WorkflowEdge[];
  videoStitchData: VideoStitchNodeData | null;
  easeCurveData: EaseCurveNodeData | null;
}

function getNodeDisplayTitle(node: WorkflowNode | undefined): string {
  if (!node) return "Unknown";
  const data = node.data as { customTitle?: unknown; inputPrompt?: unknown };
  if (typeof data.customTitle === "string" && data.customTitle.trim()) return data.customTitle.trim();
  if (typeof data.inputPrompt === "string" && data.inputPrompt.trim()) return data.inputPrompt.trim().slice(0, 32);
  return node.type;
}

function nodeHasVideoOutput(node: WorkflowNode | undefined): boolean {
  if (!node) return false;
  const data = node.data as { outputVideo?: unknown; video?: unknown };
  return Boolean(data.outputVideo || data.video);
}

function buildBezierPreviewPath(handles: [number, number, number, number]): string {
  const [x1, y1, x2, y2] = handles;
  return `M 8 92 C ${8 + x1 * 84} ${92 - y1 * 84}, ${8 + x2 * 84} ${92 - y2 * 84}, 92 8`;
}

function formatBezierHandles(handles: [number, number, number, number]): string {
  return handles.map((value) => value.toFixed(2)).join(", ");
}

export function ComposerProcessBody({
  node,
  nodes,
  edges,
  videoStitchData,
  easeCurveData,
}: ComposerProcessBodyProps) {
  const { t } = useI18n();

  if (node?.type === "videoStitch") {
    const stitchEdges = edges.filter((edge) => {
      if (edge.target !== node.id || edge.targetHandle !== SINGLE_INPUT_HANDLE_ID) return false;
      const sourceNode = nodes.find((candidate) => candidate.id === edge.source);
      return sourceNode ? getNodeOutputMediaType(sourceNode) === "video" : false;
    });

    return (
      <div className="grid gap-3 md:grid-cols-[1fr_180px]">
        <div className="min-w-0 rounded-lg border border-[var(--border-subtle)] bg-[var(--surface-1)] p-3">
          <div className="text-xs font-medium text-[var(--text-secondary)]">{t("composer.videoStitchInputs")}</div>
          <div className="nowheel mt-3 grid max-h-28 grid-cols-2 gap-2 overflow-y-auto pr-1">
            {stitchEdges.map((edge, index) => {
              const sourceNode = nodes.find((candidate) => candidate.id === edge.source);
              return (
                <div key={edge.id} className="flex min-w-0 items-center gap-2 rounded-md border border-[var(--border-subtle)] bg-[var(--surface-2)] px-2 py-2">
                  <span className={`h-2 w-2 shrink-0 rounded-full ${nodeHasVideoOutput(sourceNode) ? "bg-[var(--handle-color)]" : "bg-[var(--text-disabled)]"}`} />
                  <div className="min-w-0">
                    <div className="truncate text-xs text-[var(--text-secondary)]">{t("composer.videoStitchClip", { index: index + 1 })}</div>
                    <div className="truncate text-[11px] text-[var(--text-muted)]">{getNodeDisplayTitle(sourceNode)}</div>
                  </div>
                </div>
              );
            })}
          </div>
        </div>
        <div className="rounded-lg border border-[var(--border-subtle)] bg-[var(--surface-1)] p-3 text-xs text-[var(--text-muted)]">
          {videoStitchData?.outputVideo ? t("composer.videoStitchOutputReady") : t("composer.videoStitchNoOutput")}
        </div>
      </div>
    );
  }

  if (node?.type === "easeCurve") {
    const handles = easeCurveData?.bezierHandles ?? [0.42, 0, 0.58, 1];

    return (
      <div className="grid gap-3 md:grid-cols-[1fr_180px]">
        <div className="min-w-0 rounded-lg border border-[var(--border-subtle)] bg-[var(--surface-1)] p-3">
          <div className="text-xs font-medium text-[var(--text-secondary)]">{t("composer.easeCurveSettings")}</div>
          <div className="mt-3 grid gap-3 md:grid-cols-[120px_1fr]">
            <div className="rounded-md border border-[var(--border-subtle)] bg-[var(--surface-1)] p-2">
              <svg viewBox="0 0 100 100" className="h-24 w-full">
                <path d="M 8 92 L 92 8" stroke="rgb(64 64 64)" strokeWidth="2" strokeDasharray="5 5" fill="none" />
                <path d={buildBezierPreviewPath(handles)} stroke="rgb(190 242 100)" strokeWidth="4" fill="none" strokeLinecap="round" />
              </svg>
            </div>
            <div className="min-w-0 space-y-2 text-xs text-[var(--text-secondary)]">
              <div className="rounded-md border border-[var(--border-subtle)] bg-[var(--surface-2)] px-2 py-2">{easeCurveData?.easingPreset ?? t("composer.easeCurveCustom")}</div>
              <div className="rounded-md border border-[var(--border-subtle)] bg-[var(--surface-2)] px-2 py-2 font-mono text-[11px]">{formatBezierHandles(handles)}</div>
            </div>
          </div>
        </div>
        <div className="rounded-lg border border-[var(--border-subtle)] bg-[var(--surface-1)] p-3 text-xs text-[var(--text-muted)]">
          {easeCurveData?.outputVideo ? t("composer.easeCurveOutputReady") : t("composer.easeCurveNoOutput")}
        </div>
      </div>
    );
  }

  return null;
}