import parser from '@typescript-eslint/parser';
import { RuleTester } from '@typescript-eslint/rule-tester';
import { importStyleRule } from './import-style.mjs';

const ruleName = 'import-style';

const tester = new RuleTester({
  languageOptions: {
    parser,
    parserOptions: {
      ecmaVersion: 2020,
      sourceType: 'module',
    },
  },
});

describe('import-style', () => {
  describe('namespace import mode (default)', () => {
    tester.run(ruleName, importStyleRule, {
      valid: [
        {
          code: "import * as React from 'react';",
        },
        {
          code: "import type * as React from 'react';",
        },
        {
          code: "import { useMemo } from 'react-use';",
        },
      ],
      invalid: [
        {
          code: "import React from 'react';",
          errors: [
            {
              messageId: 'namespaceImportRequired',
            },
          ],
        },
        {
          code: "import { useState } from 'react';",
          errors: [
            {
              messageId: 'namespaceImportRequired',
            },
          ],
        },
        {
          code: "import * as R from 'react';",
          errors: [
            {
              messageId: 'namespaceNameMustBeReact',
            },
          ],
        },
        {
          code: "import React, * as R from 'react';",
          errors: [
            {
              messageId: 'namespaceImportRequired',
            },
          ],
        },
      ],
    });
  });

  describe('named import mode', () => {
    tester.run(ruleName, importStyleRule, {
      valid: [
        {
          code: "import { useState } from 'react';",
          options: [{ importStyle: 'named' }],
        },
        {
          code: "import { useState, useEffect } from 'react';",
          options: [{ importStyle: 'named' }],
        },
        {
          code: "import { useMemo } from 'react-use';",
          options: [{ importStyle: 'named' }],
        },
        {
          code: "import type { FC } from 'react';",
          options: [{ importStyle: 'named' }],
        },
      ],
      invalid: [
        {
          code: "import * as React from 'react';",
          options: [{ importStyle: 'named' }],
          errors: [
            {
              messageId: 'namedImportRequired',
            },
          ],
        },
        {
          code: "import React from 'react';",
          options: [{ importStyle: 'named' }],
          errors: [
            {
              messageId: 'namedImportRequired',
            },
          ],
        },
      ],
    });
  });
});