import * as DiffParser from './diff-parser';
import { FileListRenderer } from './file-list-renderer';
import LineByLineRenderer, { LineByLineRendererConfig, defaultLineByLineRendererConfig } from './line-by-line-renderer';
import SideBySideRenderer, { SideBySideRendererConfig, defaultSideBySideRendererConfig } from './side-by-side-renderer';
import { DiffFile, OutputFormatType } from './types';
import HoganJsUtils, { HoganJsUtilsConfig } from './hoganjs-utils';

export interface Diff2HtmlConfig
 extends DiffParser.DiffParserConfig,
 LineByLineRendererConfig,
 SideBySideRendererConfig,
 HoganJsUtilsConfig {
 outputFormat?: OutputFormatType;
 drawFileList?: boolean;
}

export const defaultDiff2HtmlConfig = {
 ...defaultLineByLineRendererConfig,
 ...defaultSideBySideRendererConfig,
 outputFormat: OutputFormatType.LINE_BY_LINE,
 drawFileList: true,
};

export function parse(diffInput: string, configuration: Diff2HtmlConfig = {}): DiffFile[] {
 return DiffParser.parse(diffInput, { ...defaultDiff2HtmlConfig, ...configuration });
}

export function html(diffInput: string | DiffFile[], configuration: Diff2HtmlConfig = {}): string {
 const config = { ...defaultDiff2HtmlConfig, ...configuration };

 const diffJson = typeof diffInput === 'string' ? DiffParser.parse(diffInput, config) : diffInput;

 const hoganUtils = new HoganJsUtils(config);

 const { colorScheme } = config;
 const fileListRendererConfig = { colorScheme };

 const fileList = config.drawFileList ? new FileListRenderer(hoganUtils, fileListRendererConfig).render(diffJson) : '';

 const diffOutput =
 config.outputFormat === 'side-by-side'
 ? new SideBySideRenderer(hoganUtils, config).render(diffJson)
 : new LineByLineRenderer(hoganUtils, config).render(diffJson);

 return fileList + diffOutput;
}