// ESLint flat config for evidence-source.
//
// Enforces the one boundary that matters in this repo: the browser upload
// surface (`src/browser/**`) may depend on the headless core (`src/pdf/**`),
// but the headless core must never import from `src/browser/**`. That keeps
// `src/pdf/` runtime-agnostic (no `URL.createObjectURL`, no `Blob` upload
// path) so it loads cleanly in Node and browsers alike.

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

export default tseslint.config(
  {
    ignores: ["dist/", "node_modules/", "coverage/", "**/*.d.ts"],
  },
  js.configs.recommended,
  ...tseslint.configs.recommended,
  {
    files: ["src/**/*.ts", "tests/**/*.ts"],
    languageOptions: {
      ecmaVersion: 2022,
      sourceType: "module",
      globals: { ...globals.node },
    },
    plugins: {
      import: importPlugin,
    },
    settings: {
      "import/resolver": {
        typescript: { project: "./tsconfig.json" },
      },
    },
    rules: {
      "no-restricted-imports": [
        "error",
        {
          patterns: [
            {
              group: ["**/browser/**", "../browser/*", "./browser/*"],
              message:
                "The headless core (src/pdf) must not depend on browser helpers (src/browser).",
            },
          ],
        },
      ],
    },
  },
  {
    // Browser helpers are allowed to reach into the headless core; relax the
    // guard for tests, which import from anywhere.
    files: ["src/browser/**/*.ts", "tests/**/*.ts", "src/index.ts"],
    rules: {
      "no-restricted-imports": "off",
    },
  },
);