"use strict";

const SCALABLE_TOOLS = new Set(scalableToolIds());
const TEXT_ICON_TOOL_IDS = new Set(["poke", "pinch", "water_hose", "rope", "rod", "reciprocator", "copy", "undo", "redo", "area_delete", "clear_tool"]);

function applyToolTextIcon(btn, def, toolId) {
  if (!btn || !def?.iconText || !TEXT_ICON_TOOL_IDS.has(toolId)) return false;
  btn.classList.add("tool-emoji-icon");
  btn.style.setProperty("--tool-emoji", JSON.stringify(String(def.iconText)));
  return true;
}

function cssToolIconPath(path) {
  const raw = String(path || "").trim();
  if (!raw) return "";
  if (/^(?:[a-z]+:|data:|\/)/i.test(raw)) return raw;
  if (raw.startsWith("../")) return raw;
  if (raw.startsWith("./assets/")) return `../${raw.slice(2)}`;
  if (raw.startsWith("assets/")) return `../${raw}`;
  return raw;
}

function applyToolImageIcon(btn, def) {
  if (!btn || !def?.icon) return false;
  const iconPath = cssToolIconPath(def.icon);
  if (!iconPath) return false;
  btn.style.setProperty("--tool-icon", `url(${JSON.stringify(iconPath)})`);
  return true;
}

const SIZE_ORDER = window.TarinaiItemToolMetadata?.TOOL_SIZE_ORDER || ["small", "medium", "large"];

const SIZE_LABELS = window.TarinaiItemToolMetadata?.TOOL_SIZE_LABELS || { small: "\u5c0f", medium: "\u4e2d", large: "\u5927" };

function renderToolPalette() {
  if (!ui?.toolPalette || typeof toolCategories !== "function") return;
  ui.toolPalette.innerHTML = "";
  const frag = document.createDocumentFragment();
  for (const category of toolCategories()) {
    const section = document.createElement("section");
    section.className = `tool-category ${category.themeClass || ""}`.trim();
    section.dataset.toolCategory = category.id;
    const mobileCompact = Boolean(window.TarinaiInputMode.classification?.touchFirst || document.body.classList.contains("touch-mobile-ui"));
    const initiallyCollapsed = mobileCompact && category.id !== "operate";
    if (initiallyCollapsed) section.classList.add("collapsed");
    const toggle = document.createElement("button");
    toggle.className = "tool-category-toggle";
    toggle.type = "button";
    toggle.setAttribute("aria-expanded", initiallyCollapsed ? "false" : "true");
    toggle.textContent = category.label || category.id;
    const body = document.createElement("div");
    body.className = "tool-grid tool-category-body";
    for (const toolId of category.toolIds || []) {
      const def = toolDefinition(toolId);
      if (!def || def.simulationOnly || toolId === "observe") continue;
      const btn = document.createElement("button");
      btn.className = "tool";
      const hasTextIcon = applyToolTextIcon(btn, def, toolId);
      if (!hasTextIcon) applyToolImageIcon(btn, def);
      btn.dataset.tool = toolId;
      btn.dataset.toolCategory = category.id || "";
      const label = document.createElement("span");
      label.className = "tool-label";
      label.textContent = def.label || toolId;
      btn.setAttribute("aria-label", label.textContent);
      btn.removeAttribute("title");
      btn.appendChild(label);
      attachToolSpritePreview(btn, def, toolId);
      if (toolId === world?.tool) btn.classList.add("selected");
      body.appendChild(btn);
    }
    section.append(toggle, body);
    frag.appendChild(section);
  }
  ui.toolPalette.appendChild(frag);
}

function drawToolPreviewCanvas(canvas, itemType, { watermark = false } = {}) {
  if (!canvas || !itemType) return false;
  const ctx = canvas.getContext("2d");
  if (!ctx) return false;
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  if (typeof window.drawToolItemPreview !== "function") return false;
  return window.drawToolItemPreview(ctx, itemType, { width: canvas.width, height: canvas.height, compact: true, watermark }) !== false;
}

function createToolPreviewCanvas(className, size = 96) {
  const canvas = document.createElement("canvas");
  canvas.className = className;
  canvas.width = size;
  canvas.height = size;
  canvas.setAttribute("aria-hidden", "true");
  return canvas;
}

function attachToolSpritePreview(btn, def, toolId) {
  const itemType = def?.itemType || toolId;
  if (!btn || !itemType || !def?.placeable || TEXT_ICON_TOOL_IDS.has(toolId)) return;
  if (toolId === "reciprocator") return;
  if (toolId === "ball" || itemType === "ball") return;
  if (typeof window.drawToolItemPreview !== "function") return;

  const iconCanvas = createToolPreviewCanvas("tool-sprite-preview", 160);
  const iconDrawn = drawToolPreviewCanvas(iconCanvas, itemType);
  if (!iconDrawn) return;

  btn.classList.add("tool-has-canvas-icon");
  btn.prepend(iconCanvas);
}

function toolSizeFor(tool) {
  if (!SCALABLE_TOOLS.has(tool)) return "";
  return normalizedToolSizeFor(world, tool);
}

function cycleToolSize(tool) {
  if (!SCALABLE_TOOLS.has(tool)) return false;
  const result = window.TarinaiCommands.dispatch(world, { type: "tool.size.cycle", toolId: tool, order: SIZE_ORDER });
  if (!result?.ok) return false;
  syncToolSizeBadges();
  showToast(`\u30b5\u30a4\u30ba: ${SIZE_LABELS[result.size] || result.size}`);
  return true;
}

function syncToolSizeBadges() {
  for (const btn of uiCache.toolButtons || []) {
    const tool = btn.dataset.tool || "";
    const old = btn.querySelector(".tool-size-badge");
    if (!SCALABLE_TOOLS.has(tool)) {
      if (old) old.remove();
      continue;
    }
    const size = toolSizeFor(tool);
    let badge = old;
    if (!badge) {
      badge = document.createElement("b");
      badge.className = "tool-size-badge";
      btn.appendChild(badge);
    }
    badge.textContent = SIZE_LABELS[size] || size;
  }
}