/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import MagicString from 'magic-string';
import * as ts from 'typescript';
import {fromObject} from 'convert-source-map';
import {Import, ImportManager} from '../../../src/ngtsc/translator';
import {CompiledClass, DecorationAnalyzer} from '../../src/analysis/decoration_analyzer';
import {NgccReferencesRegistry} from '../../src/analysis/ngcc_references_registry';
import {ModuleWithProvidersAnalyzer, ModuleWithProvidersInfo} from '../../src/analysis/module_with_providers_analyzer';
import {PrivateDeclarationsAnalyzer, ExportInfo} from '../../src/analysis/private_declarations_analyzer';
import {Esm2015ReflectionHost} from '../../src/host/esm2015_host';
import {DtsRenderer} from '../../src/rendering/dts_renderer';
import {makeTestEntryPointBundle, createFileSystemFromProgramFiles} from '../helpers/utils';
import {MockLogger} from '../helpers/mock_logger';
import {RenderingFormatter, RedundantDecoratorMap} from '../../src/rendering/rendering_formatter';
import {MockFileSystem} from '../helpers/mock_file_system';
import {AbsoluteFsPath} from '@angular/compiler-cli/src/ngtsc/path';

const _ = AbsoluteFsPath.fromUnchecked;

class TestRenderingFormatter implements RenderingFormatter {
  addImports(output: MagicString, imports: Import[], sf: ts.SourceFile) {
    output.prepend('\n// ADD IMPORTS\n');
  }
  addExports(output: MagicString, baseEntryPointPath: string, exports: ExportInfo[]) {
    output.prepend('\n// ADD EXPORTS\n');
  }
  addConstants(output: MagicString, constants: string, file: ts.SourceFile): void {
    output.prepend('\n// ADD CONSTANTS\n');
  }
  addDefinitions(output: MagicString, compiledClass: CompiledClass, definitions: string) {
    output.prepend('\n// ADD DEFINITIONS\n');
  }
  removeDecorators(output: MagicString, decoratorsToRemove: RedundantDecoratorMap) {
    output.prepend('\n// REMOVE DECORATORS\n');
  }
  rewriteSwitchableDeclarations(output: MagicString, sourceFile: ts.SourceFile): void {
    output.prepend('\n// REWRITTEN DECLARATIONS\n');
  }
  addModuleWithProvidersParams(
      output: MagicString, moduleWithProviders: ModuleWithProvidersInfo[],
      importManager: ImportManager): void {
    output.prepend('\n// ADD MODUlE WITH PROVIDERS PARAMS\n');
  }
}

function createTestRenderer(
    packageName: string, files: {name: string, contents: string}[],
    dtsFiles?: {name: string, contents: string}[],
    mappingFiles?: {name: string, contents: string}[]) {
  const logger = new MockLogger();
  const fs = new MockFileSystem(createFileSystemFromProgramFiles(files, dtsFiles, mappingFiles));
  const isCore = packageName === '@angular/core';
  const bundle = makeTestEntryPointBundle('es2015', 'esm2015', isCore, files, dtsFiles);
  const typeChecker = bundle.src.program.getTypeChecker();
  const host = new Esm2015ReflectionHost(logger, isCore, typeChecker, bundle.dts);
  const referencesRegistry = new NgccReferencesRegistry(host);
  const decorationAnalyses = new DecorationAnalyzer(
                                 fs, bundle.src.program, bundle.src.options, bundle.src.host,
                                 typeChecker, host, referencesRegistry, bundle.rootDirs, isCore)
                                 .analyzeProgram();
  const moduleWithProvidersAnalyses =
      new ModuleWithProvidersAnalyzer(host, referencesRegistry).analyzeProgram(bundle.src.program);
  const privateDeclarationsAnalyses =
      new PrivateDeclarationsAnalyzer(host, referencesRegistry).analyzeProgram(bundle.src.program);
  const testFormatter = new TestRenderingFormatter();
  spyOn(testFormatter, 'addExports').and.callThrough();
  spyOn(testFormatter, 'addImports').and.callThrough();
  spyOn(testFormatter, 'addDefinitions').and.callThrough();
  spyOn(testFormatter, 'addConstants').and.callThrough();
  spyOn(testFormatter, 'removeDecorators').and.callThrough();
  spyOn(testFormatter, 'rewriteSwitchableDeclarations').and.callThrough();
  spyOn(testFormatter, 'addModuleWithProvidersParams').and.callThrough();

  const renderer = new DtsRenderer(testFormatter, fs, logger, host, isCore, bundle);

  return {renderer,
          testFormatter,
          decorationAnalyses,
          moduleWithProvidersAnalyses,
          privateDeclarationsAnalyses,
          bundle};
}


describe('DtsRenderer', () => {
  const INPUT_PROGRAM = {
    name: '/src/file.js',
    contents:
        `import { Directive } from '@angular/core';\nexport class A {\n    foo(x) {\n        return x;\n    }\n}\nA.decorators = [\n    { type: Directive, args: [{ selector: '[a]' }] }\n];\n`
  };
  const INPUT_DTS_PROGRAM = {
    name: '/typings/file.d.ts',
    contents: `export declare class A {\nfoo(x: number): number;\n}\n`
  };

  const INPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'file': '/src/file.js',
    'sourceRoot': '',
    'sources': ['/src/file.ts'],
    'names': [],
    'mappings':
        'AAAA,OAAO,EAAE,SAAS,EAAE,MAAM,eAAe,CAAC;AAC1C,MAAM;IACF,GAAG,CAAC,CAAS;QACT,OAAO,CAAC,CAAC;IACb,CAAC;;AACM,YAAU,GAAG;IAChB,EAAE,IAAI,EAAE,SAAS,EAAE,IAAI,EAAE,CAAC,EAAE,QAAQ,EAAE,KAAK,EAAE,CAAC,EAAE;CACnD,CAAC',
    'sourcesContent': [INPUT_PROGRAM.contents]
  });

  const RENDERED_CONTENTS = `
// ADD IMPORTS

// ADD EXPORTS

// ADD CONSTANTS

// ADD DEFINITIONS

// REMOVE DECORATORS
` + INPUT_PROGRAM.contents;

  const MERGED_OUTPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'sources': ['/src/file.ts'],
    'names': [],
    'mappings': ';;;;;;;;;;AAAA',
    'file': 'file.js',
    'sourcesContent': [INPUT_PROGRAM.contents]
  });

  it('should render extract types into typings files', () => {
    const {renderer, decorationAnalyses, privateDeclarationsAnalyses, moduleWithProvidersAnalyses} =
        createTestRenderer('test-package', [INPUT_PROGRAM], [INPUT_DTS_PROGRAM]);
    const result = renderer.renderProgram(
        decorationAnalyses, privateDeclarationsAnalyses, moduleWithProvidersAnalyses);

    const typingsFile = result.find(f => f.path === '/typings/file.d.ts') !;
    expect(typingsFile.contents)
        .toContain(
            'foo(x: number): number;\n    static ngDirectiveDef: ɵngcc0.ɵɵDirectiveDefWithMeta');
  });

  it('should render imports into typings files', () => {
    const {renderer, decorationAnalyses, privateDeclarationsAnalyses, moduleWithProvidersAnalyses} =
        createTestRenderer('test-package', [INPUT_PROGRAM], [INPUT_DTS_PROGRAM]);
    const result = renderer.renderProgram(
        decorationAnalyses, privateDeclarationsAnalyses, moduleWithProvidersAnalyses);

    const typingsFile = result.find(f => f.path === '/typings/file.d.ts') !;
    expect(typingsFile.contents).toContain(`\n// ADD IMPORTS\n`);
  });

  it('should render exports into typings files', () => {
    const {renderer, decorationAnalyses, privateDeclarationsAnalyses, moduleWithProvidersAnalyses} =
        createTestRenderer('test-package', [INPUT_PROGRAM], [INPUT_DTS_PROGRAM]);

    // Add a mock export to trigger export rendering
    privateDeclarationsAnalyses.push(
        {identifier: 'ComponentB', from: _('/src/file.js'), dtsFrom: _('/typings/b.d.ts')});

    const result = renderer.renderProgram(
        decorationAnalyses, privateDeclarationsAnalyses, moduleWithProvidersAnalyses);

    const typingsFile = result.find(f => f.path === '/typings/file.d.ts') !;
    expect(typingsFile.contents).toContain(`\n// ADD EXPORTS\n`);
  });

  it('should render ModuleWithProviders type params', () => {
    const {renderer, decorationAnalyses, privateDeclarationsAnalyses, moduleWithProvidersAnalyses} =
        createTestRenderer('test-package', [INPUT_PROGRAM], [INPUT_DTS_PROGRAM]);

    const result = renderer.renderProgram(
        decorationAnalyses, privateDeclarationsAnalyses, moduleWithProvidersAnalyses);

    const typingsFile = result.find(f => f.path === '/typings/file.d.ts') !;
    expect(typingsFile.contents).toContain(`\n// ADD MODUlE WITH PROVIDERS PARAMS\n`);
  });
});