export type AiSelectionMode = "none" | "point" | "lasso";

export type CadEditTool = {
  id: string;
  label: string;
  pickKinds: Array<"surface_point" | "edge">;
  parameters: Record<string, string | number>;
  parameterFields: Array<{
    name: string;
    label: string;
    type: "number" | "select" | "string";
    unit?: string;
    min?: number;
    step?: number;
    options?: string[];
    placeholder?: string;
  }>;
};

export const CAD_EDIT_TOOLS: CadEditTool[] = [
  {
    id: "add_hole",
    label: "打孔",
    pickKinds: ["surface_point"],
    parameters: { holeDiameter: 2, depth: "through", direction: "face_normal" },
    parameterFields: [
      { name: "holeDiameter", label: "孔径", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "depth", label: "深度", type: "select", options: ["through", "blind"] },
    ],
  },
  {
    id: "add_counterbore",
    label: "沉孔",
    pickKinds: ["surface_point"],
    parameters: {
      holeDiameter: 3,
      counterboreDiameter: 6,
      counterboreDepth: 2,
      depth: "through",
      direction: "face_normal",
    },
    parameterFields: [
      { name: "holeDiameter", label: "底孔直径", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "counterboreDiameter", label: "沉孔直径", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "counterboreDepth", label: "沉孔深度", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "depth", label: "深度", type: "select", options: ["through", "blind"] },
    ],
  },
  {
    id: "add_countersink",
    label: "锥沉孔",
    pickKinds: ["surface_point"],
    parameters: {
      holeDiameter: 3,
      countersinkDiameter: 6,
      countersinkAngleDeg: 90,
      depth: "through",
      direction: "face_normal",
    },
    parameterFields: [
      { name: "holeDiameter", label: "底孔直径", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "countersinkDiameter", label: "锥口直径", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "countersinkAngleDeg", label: "锥角", type: "number", unit: "deg", min: 1, step: 1 },
      { name: "depth", label: "深度", type: "select", options: ["through", "blind"] },
    ],
  },
  {
    id: "add_slot",
    label: "开槽",
    pickKinds: ["surface_point", "surface_point"],
    parameters: { slotWidth: 2, depth: "through", direction: "face_normal" },
    parameterFields: [
      { name: "slotWidth", label: "槽宽", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "depth", label: "深度", type: "select", options: ["through", "blind"] },
    ],
  },
  {
    id: "add_pocket",
    label: "铣型腔",
    pickKinds: ["surface_point"],
    parameters: { shape: "rectangle", width: 10, height: 6, depth: 1, direction: "face_normal", orientation: "surface_xy" },
    parameterFields: [
      { name: "width", label: "宽度", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "height", label: "高度", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "depth", label: "深度", type: "number", unit: "mm", min: 0.01, step: 0.1 },
    ],
  },
  {
    id: "add_circular_pocket",
    label: "圆形型腔",
    pickKinds: ["surface_point"],
    parameters: { diameter: 8, depth: 1, direction: "face_normal" },
    parameterFields: [
      { name: "diameter", label: "直径", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "depth", label: "深度", type: "number", unit: "mm", min: 0.01, step: 0.1 },
    ],
  },
  {
    id: "add_hole_pattern",
    label: "阵列孔",
    pickKinds: ["surface_point"],
    parameters: {
      holeDiameter: 2,
      rows: 2,
      columns: 2,
      pitchX: 8,
      pitchY: 8,
      depth: "through",
      direction: "face_normal",
      orientation: "surface_xy",
    },
    parameterFields: [
      { name: "holeDiameter", label: "孔径", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "rows", label: "行数", type: "number", min: 1, step: 1 },
      { name: "columns", label: "列数", type: "number", min: 1, step: 1 },
      { name: "pitchX", label: "X 间距", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "pitchY", label: "Y 间距", type: "number", unit: "mm", min: 0.01, step: 0.1 },
      { name: "depth", label: "深度", type: "select", options: ["through", "blind"] },
    ],
  },
  {
    id: "add_chamfer",
    label: "倒角",
    pickKinds: ["edge"],
    parameters: { distance: 1 },
    parameterFields: [
      { name: "distance", label: "倒角距离", type: "number", unit: "mm", min: 0.01, step: 0.1 },
    ],
  },
  {
    id: "add_fillet",
    label: "圆角",
    pickKinds: ["edge"],
    parameters: { radius: 1 },
    parameterFields: [
      { name: "radius", label: "圆角半径", type: "number", unit: "mm", min: 0.01, step: 0.1 },
    ],
  },
];

export function cadEditToolForOperation(operation: string) {
  return CAD_EDIT_TOOLS.find((tool) => tool.id === operation) || CAD_EDIT_TOOLS[0];
}

export function cadEditToolPickKind(operation: string) {
  return cadEditToolForOperation(operation).pickKinds[0] || "surface_point";
}

export function cadEditToolNextPickKind(operation: string, pickCount: number) {
  const pickKinds = cadEditToolForOperation(operation).pickKinds;
  return pickKinds[Math.min(Math.max(Math.floor(pickCount), 0), pickKinds.length - 1)] || "surface_point";
}

export function cadEditToolPickComplete(operation: string, picks: unknown[]) {
  return picks.length >= cadEditToolForOperation(operation).pickKinds.length;
}

export function defaultCadEditParameters(operation: string) {
  return { ...cadEditToolForOperation(operation).parameters };
}

export function buildEmbeddedCadEditIntent({
  operation,
  pick,
  parameters,
  artifactPath,
  taskId,
}: {
  operation: string;
  pick: Record<string, unknown>;
  parameters?: Record<string, unknown>;
  artifactPath: string;
  taskId: string;
}) {
  const tool = cadEditToolForOperation(operation);
  return {
    schema: "cad-edit-intent.v1",
    operation: tool.id,
    source: {
      entryFile: artifactPath,
      stepPath: artifactPath,
      sourcePath: "",
      backend: "agent-studio",
      units: "mm",
      taskId,
    },
    selection: pick,
    parameters: {
      ...defaultCadEditParameters(tool.id),
      ...(parameters || {}),
    },
  };
}

export function buildEmbeddedGeometrySelectionIntent({
  selection,
  artifactPath,
  taskId,
}: {
  selection: Record<string, unknown>;
  artifactPath: string;
  taskId: string;
}) {
  return {
    schema: "cad-ai-geometry-selection.v1",
    intent: "modify_selected_geometry",
    source: {
      entryFile: artifactPath,
      stepPath: artifactPath,
      sourcePath: "",
      backend: "agent-studio",
      units: "mm",
      taskId,
    },
    selection,
    instruction: "用户通过 CAD Agent Studio 内置预览指定了要修改的几何区域。请结合 selection 中的屏幕坐标、近似模型坐标和当前视角理解位置，再修改可编辑源文件并重新生成 STEP 与预览资产。",
  };
}