Replace prettier with stylistic, improve types, and add no-undef rule (#1975)

eslint.config.mjs

@@ -1,14 +1,101 @@
 import globals from 'globals';
-import { defineConfig } from 'eslint/config';
-import prettier from 'eslint-plugin-prettier';
+import { defineConfig, globalIgnores } from 'eslint/config';
+import tseslint from 'typescript-eslint';
+import js from '@eslint/js';
+import stylistic from '@stylistic/eslint-plugin';
+
+/** @type {Partial<RulesConfig>} */
+export const stylisticRules = {
+    '@stylistic/indent': [
+        'error',
+        4,
+        {
+            SwitchCase: 1
+        }
+    ],
+    '@stylistic/max-len': ['error', { 
+        code: 120,
+        ignoreComments: true,
+        ignoreStrings: true,
+        ignoreTemplateLiterals: true,
+        ignoreRegExpLiterals: true
+    }],
+    '@stylistic/quotes': ['error', 'single', { allowTemplateLiterals: 'always' }],
+    '@stylistic/arrow-parens': ['error', 'as-needed'],
+    '@stylistic/quote-props': ['error', 'as-needed'],
+    '@stylistic/array-bracket-newline': ['error', 'consistent'],
+    '@stylistic/key-spacing': 'error',
+    '@stylistic/comma-dangle': ['error', 'never'],
+    '@stylistic/space-in-parens': ['error', 'never'],
+    '@stylistic/space-infix-ops': 2,
+    '@stylistic/keyword-spacing': 2,
+    '@stylistic/semi-spacing': 2,
+    '@stylistic/no-multi-spaces': 2,
+    '@stylistic/no-extra-semi': 2,
+    '@stylistic/no-whitespace-before-property': 2,
+    '@stylistic/space-unary-ops': 2
+};
 
 export default defineConfig([
-    { files: ['**/*.{js,mjs,cjs}'], languageOptions: { globals: globals.browser } },
-    { plugins: { prettier } },
+    globalIgnores(['foundry/**/*', 'build/**/*']),
+    {
+        files: ['gulpfile.js', 'postcss.config.js'],
+        languageOptions: { globals: globals.node }
+    },
     {
         files: ['**/*.{js,mjs,cjs}'],
+        plugins: {
+            '@stylistic': stylistic
+        },
+        languageOptions: {
+            globals: {
+                ...globals.browser,
+                CONFIG: 'readonly',
+                CONST: 'readonly',
+                // Global classes
+                Color: 'readonly',
+                Handlebars: 'readonly',
+                Hooks: 'readonly',
+                PIXI: 'readonly',
+                ProseMirror: 'readonly',
+                Roll: 'readonly',
+                // global namespaces
+                canvas: 'readonly',
+                foundry: 'readonly',
+                game: 'readonly',
+                ui: 'readonly',
+                // global functions
+                fromUuid: 'readonly',
+                fromUuidSync: 'readonly',
+                getDocumentClass: 'readonly',
+                _del: 'readonly',
+                _replace: 'readonly',
+                _loc: 'readonly',
+                // Documents
+                ActiveEffect: 'readonly',
+                Actor: 'readonly',
+                BaseScene: 'readonly',
+                ChatMessage: 'readonly',
+                Combat: 'readonly',
+                Combatant: 'readonly',
+                Item: 'readonly',
+                Macro: 'readonly',
+                Scene: 'readonly',
+                TokenDocument: 'readonly',
+                // Other
+                Collection: 'readonly',
+                FormDataExtended: 'readonly',
+                TextEditor: 'readonly'
+            }
+        },
         rules: {
-            'prettier/prettier': 'error'
+            'no-undef': 'error',
+            // 'no-unused-vars': ['error', { argsIgnorePattern: '^_', varsIgnorePattern: '^_' }],
+            ...stylisticRules
         }
+    },
+    {
+        files: ['**/*.ts'],
+        extends: [js.configs.recommended, tseslint.configs.recommended]
     }
 ]);