import js from "@eslint/js";
import globals from "globals";
import tseslint from "typescript-eslint";
import reactHooks from "eslint-plugin-react-hooks";
import reactRefresh from "eslint-plugin-react-refresh";

export default tseslint.config(
  {
    ignores: [
      "**/dist/**",
      "**/node_modules/**",
      "**/release/**",
      "client/public/**",
      // The packager's output, and the generated half of an app (Locadora's
      // vendored, patched emulator frontend and cores land in apps/*/public).
      "dist-apps/**",
      "apps/*/public/**",
      // a browser page that stands in for the pqp host in an app's e2e test
      "apps/*/e2e/host/**",
      "**/*.tsbuildinfo",
      // `wrangler dev` writes a bundled copy of the Worker here. It is
      // generated, it is git-ignored, and linting it fails the whole run for
      // anybody who has ever run the admin dashboard locally.
      "**/.wrangler/**",
      // VitePress's dependency-optimizer cache, git-ignored and generated.
      "**/.vitepress/cache/**",
      // The desktop share smoke test's built page and its results, both
      // generated and git-ignored (electron/test/share-smoke/).
      "electron/test/share-smoke/.page/**",
      "electron/test-results/**",
    ],
  },

  js.configs.recommended,
  ...tseslint.configs.recommended,

  {
    files: ["**/*.{ts,tsx}"],
    languageOptions: {
      ecmaVersion: 2022,
      sourceType: "module",
    },
    rules: {
      // Underscore-prefixed args are the codebase's "intentionally unused" marker.
      "@typescript-eslint/no-unused-vars": [
        "error",
        { argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
      ],
      "@typescript-eslint/no-explicit-any": "error",
      "no-console": ["warn", { allow: ["warn", "error"] }],
      eqeqeq: ["error", "always", { null: "ignore" }],
    },
  },

  {
    files: ["client/src/**/*.{ts,tsx}"],
    languageOptions: {
      globals: globals.browser,
    },
    plugins: {
      "react-hooks": reactHooks,
      "react-refresh": reactRefresh,
    },
    rules: {
      // The `eslint-disable react-hooks/exhaustive-deps` comments in this
      // codebase referenced a rule that was never installed; it is real now.
      ...reactHooks.configs.recommended.rules,
      "react-refresh/only-export-components": "off",
    },
  },

  {
    files: ["server/src/**/*.ts", "packages/shared/src/**/*.ts"],
    languageOptions: {
      globals: globals.node,
    },
    rules: {
      // Server logging is the intended observability channel here.
      "no-console": "off",
    },
  },

  {
    files: ["**/*.test.ts", "**/*.test.tsx"],
    rules: {
      "@typescript-eslint/no-explicit-any": "off",
      "no-console": "off",
    },
  },

  {
    // Ambient declaration files exist to be merged into, so every name in them
    // reads as unused.
    files: ["**/*.d.ts"],
    rules: {
      "@typescript-eslint/no-unused-vars": "off",
    },
  },

  {
    // Standalone Node ESM tooling, run with `node scripts/…`. `tools/**` is
    // the same shape one directory over: services that live in the repo but
    // outside the pnpm workspace, with their own install and their own entry
    // point (see `tools/ambient`).
    files: [
      "scripts/**/*.mjs",
      "packages/app-sdk/scripts/**/*.mjs",
      "client/scripts/**/*.mjs",
      "server/scripts/**/*.mjs",
      "client/bench/**/*.mjs",
      "client/e2e/bandwidth/**/*.mjs",
      "client/e2e/share-audio-echo/**/*.mjs",
      "client/e2e/camera-sync/**/*.mjs",
      "client/e2e/share-fast-start/**/*.mjs",
      "client/e2e/desktop-share/**/*.mjs",
      "electron/**/*.mjs",
      "flatpak/**/*.mjs",
      "tools/**/*.{js,mjs}",
      "*.mjs",
    ],
    languageOptions: {
      // Benchmarks are Node scripts that also evaluate code inside a browser
      // page, so both sets of globals are legitimately in scope.
      globals: {
        ...globals.node,
        ...globals.browser,
        WebSocket: "readonly",
        fetch: "readonly",
      },
      sourceType: "module",
    },
    rules: {
      "no-console": "off",
    },
  },

  {
    // The Electron main process is CommonJS by design.
    files: ["electron/**/*.js"],
    languageOptions: {
      globals: globals.node,
      sourceType: "commonjs",
    },
    rules: {
      "no-console": "off",
      "@typescript-eslint/no-require-imports": "off",
    },
  },

  {
    // `electron/picker/picker.js` is the one file under electron/ that runs in
    // a renderer rather than in Node: it is the share picker's page, loaded
    // from a plain `<script>` tag off a `file://` URL, so it has `document`
    // and no module system at all. Linting it as a main-process CommonJS file
    // fails on every DOM call it makes.
    files: ["electron/picker/picker.js"],
    languageOptions: {
      globals: globals.browser,
      sourceType: "script",
    },
  },
);