// ESLint flat config — keeps viewer-library imports behind the PDF adapter
// boundary and the selector/resolution core pure.

import js from "@eslint/js";
import tseslint from "typescript-eslint";
import importPlugin from "eslint-plugin-import";
import globals from "globals";

const VIEWER_LIBS = ["pdfjs-dist", "react", "react-dom", "react-pdf-highlighter-plus"];

export default tseslint.config(
  {
    ignores: ["dist/", "node_modules/", "coverage/", "**/*.d.ts"],
  },
  js.configs.recommended,
  ...tseslint.configs.recommended,
  {
    files: ["src/**/*.{ts,tsx}"],
    languageOptions: {
      ecmaVersion: 2022,
      sourceType: "module",
      globals: { ...globals.node, ...globals.browser },
    },
    plugins: {
      import: importPlugin,
    },
    settings: {
      "import/resolver": {
        typescript: { project: "./tsconfig.json" },
      },
    },
  },
  {
    // The pure core (selectors, resolution, highlight helpers) must not pull in
    // any concrete viewer library — those live only under src/pdf/.
    files: ["src/selectors/**/*.ts", "src/highlight/**/*.ts", "src/types.ts"],
    rules: {
      "no-restricted-imports": [
        "error",
        {
          paths: VIEWER_LIBS.map((name) => ({
            name,
            message: "Viewer libraries are confined to src/pdf/ (adapter boundary).",
          })),
        },
      ],
    },
  },
);