// ESLint Flat Config for Weaver
const eslint = require('@eslint/js');
const tseslint = require('typescript-eslint');
const angular = require('angular-eslint');
const stylisticTs = require('@stylistic/eslint-plugin-ts');
const stylisticJs = require('@stylistic/eslint-plugin-js');
const newlines = require('eslint-plugin-import-newlines');

// Inline plugin: ban en dash (–, U+2013) and em dash (—, U+2014) from source files
const noDashPlugin = {
  rules: {
    'no-unicode-dashes': {
      meta: { fixable: 'code' },
      create(context) {
        const BANNED = [
          { char: '\u2013', name: 'en dash (–)' },
          { char: '\u2014', name: 'em dash (—)' }
        ];
        return {
          Program() {
            const src = context.getSourceCode().getText();
            for (const { char, name } of BANNED) {
              let idx = src.indexOf(char);
              while (idx !== -1) {
                const start = idx;
                const end = idx + char.length;
                context.report({
                  loc: context.getSourceCode().getLocFromIndex(idx),
                  message: `Unicode ${name} is not allowed. Use a regular hyphen (-) instead.`,
                  fix(fixer) {
                    return fixer.replaceTextRange([start, end], '-');
                  }
                });
                idx = src.indexOf(char, idx + 1);
              }
            }
          }
        };
      }
    }
  }
};

module.exports = tseslint.config(
  {
    ignores: ['**/.angular/**', '**/generated/*', '**/dist/**', '**/migrations/**', 'release/**']
  },
  {
    files: ['**/*.ts'],
    plugins: {
      '@stylistic/ts': stylisticTs,
      '@stylistic/js': stylisticJs,
      'import-newlines': newlines,
      'no-dashes': noDashPlugin
    },
    extends: [
      eslint.configs.recommended,
      ...tseslint.configs.recommended,
      ...tseslint.configs.stylistic,
      ...angular.configs.tsRecommended,
      ...tseslint.configs.strict
    ],
    processor: angular.processInlineTemplates,
    rules: {
        '@angular-eslint/component-max-inline-declarations': [
          'error',
          {
            template: 3,
            styles: 0
          }
        ],
      'no-dashes/no-unicode-dashes': 'error',
      '@typescript-eslint/no-extraneous-class': 'off',
      '@angular-eslint/component-class-suffix': [ 'error', { suffixes: ['Component','Page','Stub'] } ],
      '@angular-eslint/directive-class-suffix': 'error',
      '@typescript-eslint/explicit-module-boundry-types': 'off',
      '@typescript-eslint/explicit-module-boundary-types': 'off',
      '@typescript-eslint/explicit-member-accessibility': ['error',{ accessibility: 'no-public' }],
      '@typescript-eslint/array-type': ['error',{ default: 'array' }],
      '@typescript-eslint/consistent-type-definitions': 'error',
      '@typescript-eslint/dot-notation': 'off',
      '@stylistic/ts/indent': ['error',2,{ ignoredNodes:[
        'TSTypeParameterInstantation',
        'FunctionExpression > .params[decorators.length > 0]',
        'FunctionExpression > .params > :matches(Decorator, :not(:first-child))',
  'ClassBody.body > PropertyDefinition[decorators.length > 0] > .key'
      ], SwitchCase:1 }],
      '@stylistic/ts/member-delimiter-style': ['error',{ multiline:{ delimiter:'semi', requireLast:true }, singleline:{ delimiter:'semi', requireLast:false } }],
      '@typescript-eslint/member-ordering': ['error',{ default:[
        'signature','call-signature',
        'public-static-field','protected-static-field','private-static-field','#private-static-field',
        'public-decorated-field','protected-decorated-field','private-decorated-field',
        'public-instance-field','protected-instance-field','private-instance-field','#private-instance-field',
        'public-abstract-field','protected-abstract-field',
        'public-field','protected-field','private-field','#private-field',
        'static-field','instance-field','abstract-field','decorated-field','field','static-initialization',
        'public-constructor','protected-constructor','private-constructor','constructor',
        'public-static-method','protected-static-method','private-static-method','#private-static-method',
        'public-decorated-method','protected-decorated-method','private-decorated-method',
        'public-instance-method','protected-instance-method','private-instance-method','#private-instance-method',
        'public-abstract-method','protected-abstract-method','public-method','protected-method','private-method','#private-method',
        'static-method','instance-method','abstract-method','decorated-method','method'
      ] }],
      '@typescript-eslint/no-empty-function': 'off',
      '@typescript-eslint/no-empty-interface': 'error',
      '@typescript-eslint/no-explicit-any': 'error',
      '@typescript-eslint/no-invalid-this': 'error',
      '@typescript-eslint/no-namespace': 'error',
      '@typescript-eslint/prefer-namespace-keyword': 'error',
      '@typescript-eslint/no-unused-expressions': 'error',
      '@typescript-eslint/no-unused-vars': ['error',{ argsIgnorePattern: '^_', ignoreRestSiblings: true }],
      '@typescript-eslint/no-var-requires': 'error',
      '@typescript-eslint/prefer-for-of': 'error',
      '@typescript-eslint/prefer-function-type': 'error',
      '@stylistic/ts/quotes': ['error','single',{ avoidEscape:true }],
      '@stylistic/ts/semi': ['error','always'],
      '@stylistic/ts/type-annotation-spacing': 'error',
      '@typescript-eslint/unified-signatures': 'error',
      '@stylistic/js/array-bracket-spacing': 'error',
      '@stylistic/ts/comma-dangle': ['error','never'],
      '@stylistic/ts/comma-spacing': 'error',
      '@stylistic/js/comma-style': 'error',
      'complexity': ['warn',{ max:20 }],
      'curly': 'off',
      'eol-last': 'error',
      'id-denylist': ['warn','e','cb','i','x','c','y','any','string','String','Undefined','undefined','callback'],
      'max-len': ['error',{ code:150, ignoreComments:true }],
      'new-parens': 'error',
      'newline-per-chained-call': 'error',
      'no-bitwise': 'off',
      'no-cond-assign': 'error',
      'no-empty': 'off',
      'no-eval': 'error',
      '@stylistic/js/no-multi-spaces': 'error',
      '@stylistic/js/no-multiple-empty-lines': ['error',{ max:1, maxEOF:1 }],
      'no-new-wrappers': 'error',
      'no-restricted-imports': ['error','rxjs/Rx'],
      'no-throw-literal': 'error',
      'no-trailing-spaces': 'error',
      'no-undef-init': 'error',
      'no-unsafe-finally': 'error',
      'no-var': 'error',
      'one-var': ['error','never'],
      'prefer-const': 'error',
      '@stylistic/ts/space-before-blocks': 'error',
      '@stylistic/js/space-before-function-paren': ['error',{ anonymous:'never', asyncArrow:'always', named:'never' }],
      '@stylistic/ts/space-infix-ops': 'error',
      '@stylistic/js/space-in-parens': 'error',
      '@stylistic/js/space-unary-ops': 'error',
      '@stylistic/js/spaced-comment': ['error','always',{ markers:['/'] }],
      '@stylistic/js/array-bracket-spacing': 'error',
      '@stylistic/js/array-element-newline': ['error', {
        multiline: true,
        minItems: 3
      }],
      '@stylistic/js/array-bracket-newline': ['error', {
        multiline: true,
        minItems: 3
      }],
      "import-newlines/enforce": [
        "error",
        2
      ],
      // Require spaces inside single-line blocks: { stmt; }
      '@stylistic/js/block-spacing': ['error','always'],

      // Disallow single-line if statements but allow body on the next line (with or without braces)
      // Examples allowed:
      // if (condition)\n  return true;
      // if (condition)\n  {\n    return true;\n  }
      'nonblock-statement-body-position': ['error', 'below'],
      // Ensure only one statement per line to prevent patterns like: if (cond) { doThing(); }
      'max-statements-per-line': ['error', { max: 1 }],
      // Prevent single-character identifiers for variables/params; do not check object property names
      'id-length': ['error', { min: 2, properties: 'never', exceptions: ['_'] }],
      // Require blank lines around block-like statements (if, function, class, switch, try, etc.)
      'padding-line-between-statements': [
        'error',
        // Ensure blank lines around standalone if statements within the same scope
        { blankLine: 'always', prev: '*', next: 'if' },
        { blankLine: 'always', prev: 'if', next: '*' },
        // Keep clear separation around any block-like statement (if, function, class, switch, try, etc.)
        { blankLine: 'always', prev: '*', next: 'block-like' },
        { blankLine: 'always', prev: 'block-like', next: '*' },
        // Always require a blank line after functions (and multiline expressions)
        { blankLine: 'always', prev: ['function', 'multiline-expression'], next: '*' },
        // Always require a blank line after class declarations (and multiline expressions)
        { blankLine: 'always', prev: ['class', 'multiline-expression'], next: '*' },
        // Always require a blank line after groups of variable declarations
        { blankLine: 'always', prev: 'const', next: '*' },
        { blankLine: 'always', prev: 'let', next: '*' },
        { blankLine: 'always', prev: 'var', next: '*' },
        // But never require a blank line between a series of variable declarations of the same kind
        { blankLine: 'never', prev: 'const', next: 'const' },
        { blankLine: 'never', prev: 'let', next: 'let' },
        { blankLine: 'never', prev: 'var', next: 'var' }
      ]
    }
  },
  // HTML template formatting rules (external Angular templates only)
  {
    files: ['toju-app/src/app/**/*.html'],
    plugins: { 'no-dashes': noDashPlugin },
    extends: [...angular.configs.templateRecommended, ...angular.configs.templateAccessibility],
    rules: {
      'no-dashes/no-unicode-dashes': 'error',
      // Angular template best practices
      '@angular-eslint/template/button-has-type': 'warn',
      '@angular-eslint/template/cyclomatic-complexity': ['warn', { maxComplexity: 10 }],
      '@angular-eslint/template/eqeqeq': 'error',
      '@angular-eslint/template/prefer-control-flow': 'error',
      '@angular-eslint/template/prefer-ngsrc': 'warn',
      '@angular-eslint/template/prefer-self-closing-tags': 'warn',
      '@angular-eslint/template/use-track-by-function': 'warn',
      '@angular-eslint/template/no-negated-async': 'warn',
      '@angular-eslint/template/no-call-expression': 'off', // Allow method calls in templates
      // Note: attributes-order is disabled in favor of Prettier handling formatting
      // Prettier uses singleAttributePerLine to enforce property grouping
    },
  },
);

// IMPORTANT: Formatting is handled by Prettier, not ESLint
// ESLint validates logic/accessibility, Prettier handles formatting
// Enable format on save in VS Code settings to use Prettier automatically