import { Cursor, Eraser, Hand, PaintBrush, DropHalf, MagicWand, Sparkle } from "@phosphor-icons/react";
import { commandIds } from "@commands/ids";
import type { AppStore } from "@editor/store";
import type { InteractionMode, OperationId, ToolId } from "@editor/tools";
import { availableOperationIds, availableToolIds } from "@editor/tools";
import { isOperationWorkspacePanel, type WorkspacePanel } from "@editor/state";
import { labelForTool } from "./toolLabels";

export type ToolOverlayProps = {
  activeTool: ToolId;
  interactionMode: InteractionMode;
  panel: WorkspacePanel;
  dispatch: AppStore["dispatch"];
};

export function ToolOverlay({ activeTool, interactionMode, panel, dispatch }: ToolOverlayProps) {
  return (
    <nav
      aria-label="Tools"
      className="app-surface pointer-events-auto flex w-11 flex-col items-center gap-1 rounded-xl p-1 text-white"
    >
      {availableToolIds.map((tool) => {
        const active = !isOperationWorkspacePanel(panel) && isToolHighlighted(tool, activeTool, interactionMode);
        const Icon = iconForTool(tool);

        return (
          <button
            key={tool}
            type="button"
            aria-label={labelForTool(tool)}
            aria-pressed={active}
            title={labelForTool(tool)}
            className={buttonClass(active)}
            onClick={() => dispatch(commandIds.toolSetActive, { tool })}
          >
            <Icon size={18} weight={active ? "fill" : "regular"} />
          </button>
        );
      })}
      <div className="my-0.5 h-px w-6 bg-white/10" aria-hidden="true" />
      {availableOperationIds.map((operation) => {
        const active = panel === operation;
        const Icon = iconForOperation(operation);
        return (
          <button
            key={operation}
            type="button"
            aria-label={labelForOperation(operation)}
            aria-pressed={active}
            title={labelForOperation(operation)}
            className={buttonClass(active)}
            onClick={() => dispatch(commandIds.workspaceSetPanel, { panel: active ? "none" : operation })}
          >
            <Icon size={18} weight={active ? "fill" : "regular"} />
          </button>
        );
      })}
    </nav>
  );
}

function iconForTool(tool: ToolId) {
  switch (tool) {
    case "brush":
      return PaintBrush;
    case "eraser":
      return Eraser;
    case "magicWand":
      return MagicWand;
    case "pan":
      return Hand;
    case "select":
      return Cursor;
  }
}

function iconForOperation(operation: OperationId) {
  return operation === "generate" ? Sparkle : DropHalf;
}

function labelForOperation(operation: OperationId) {
  return operation === "generate" ? "Generate" : "Chroma key";
}

function isToolHighlighted(tool: ToolId, activeTool: ToolId, interactionMode: InteractionMode) {
  if (interactionMode.type === "temporary-pan") return tool === "pan";
  return activeTool === tool;
}

function buttonClass(active: boolean) {
  const base = "inline-flex size-9 items-center justify-center rounded-lg text-xs font-medium transition focus:outline-none focus-visible:ring-2 focus-visible:ring-sky-300/50";
  return active ? `${base} bg-sky-300 text-slate-950` : `${base} text-white/55 hover:bg-white/[0.07] hover:text-white`;
}