import { Options as HtmlMinifierOptions } from "html-minifier";
import { AsyncSeriesWaterfallHook } from "tapable";
import { compilation, Compiler, Plugin } from "webpack";

export = HtmlWebpackPlugin;

type TemplateFunction = (param: object) => string;

declare class HtmlWebpackPlugin extends Plugin {
    constructor(options?: HtmlWebpackPlugin.Options);

    apply(compiler: Compiler): void;

    evaluateCompilationResult(
        compilation: compilation.Compilation,
        content: string,
    ): Promise<string | TemplateFunction>;

    executeTemplate(
        templateFunction: TemplateFunction,
        chunks: any,
        assets: any,
        compilation: compilation.Compilation,
    ): Promise<string>;

    postProcessHtml(html: string, assets: any, assetTags: any): Promise<string>;
}

declare namespace HtmlWebpackPlugin {
    type MinifyOptions = HtmlMinifierOptions;

    interface TemplateParametersAssets {
        /** The public path */
        publicPath: string;
        /** Will contain all js & css files by chunk */
        chunks: {};
        /** Will contain all js files */
        js: string[];
        /** Will contain all css files */
        css: string[];
        /** Will contain a favicon if it exists */
        favicon?: string | undefined;
        /** Will contain amn appcache manifest file if it exists */
        manifest?: string | undefined;
    }

    interface Options {
        /**
         * Emit the file only if it was changed.
         * Default: `true`.
         */
        cache?: boolean | undefined;
        /**
         * Allows to control how chunks should be sorted before they are included to the html.
         * Default: `'auto'`.
         */
        chunksSortMode?:
            | "none"
            | "auto"
            | "dependency"
            | "manual"
            | ((a: compilation.Chunk, b: compilation.Chunk) => number)
            | undefined;
        /**
         * Allows you to add only some chunks (e.g. only the unit-test chunk).
         * Default: 'all'.
         */
        chunks?: "all" | string[] | undefined;
        /**
         * Allows you to skip some chunks (e.g. don't add the unit-test chunk).
         * Default: `[]`.
         */
        excludeChunks?: string[] | undefined;
        /**
         * Adds the given favicon path to the output html.
         * Default: `false`.
         */
        favicon?: false | string | undefined;
        /**
         * The file to write the HTML to.
         * You can specify a subdirectory here too (eg: `assets/admin.html`).
         * Default: `'index.html'`.
         */
        filename?: string | undefined;
        /**
         * If true then append a unique webpack compilation hash to all included scripts and CSS files.
         * This is useful for cache busting.
         * Default: `false`.
         */
        hash?: boolean | undefined;
        /**
         * Inject all assets into the given template or templateContent.
         * When passing true or 'body' all javascript resources will be placed at the bottom of the body element.
         * 'head' will place the scripts in the head element.
         * Default: `true`.
         */
        inject?: "body" | "head" | boolean | undefined;
        /**
         * Allows to inject meta-tags, e.g. meta: `{viewport: 'width=device-width, initial-scale=1, shrink-to-fit=no'}`.
         * Default: `{}`.
         */
        meta?: false | { [name: string]: any } | undefined;
        /**
         * Pass a html-minifier options object to minify the output.
         * https://github.com/kangax/html-minifier#options-quick-reference
         * Default: `false`.
         */
        minify?: false | MinifyOptions | undefined;
        /**
         * Errors details will be written into the HTML page.
         * Default: `true`.
         */
        showErrors?: boolean | undefined;
        /**
         * The `webpack` require path to the template.
         * @see https://github.com/jantimon/html-webpack-plugin/blob/master/docs/template-option.md
         */
        template?: string | undefined;
        /**
         * Allow to use a html string instead of reading from a file.
         * Default: `false`, meaning the `template` option should be used instead.
         */
        templateContent?: false | string | TemplateFunction | undefined;
        /**
         * Allows to overwrite the parameters used in the template.
         */
        templateParameters?:
            | false
            | ((compilation: compilation.Compilation, assets: TemplateParametersAssets, options: Options) => any)
            | { [key: string]: any }
            | undefined;
        /**
         * The title to use for the generated HTML document.
         * Default: `'Webpack App'`.
         */
        title?: string | undefined;
        /**
         * If true render the link tags as self-closing (XHTML compliant).
         * Default: `false`.
         */
        xhtml?: boolean | undefined;
        /**
         * In addition to the options actually used by this plugin, you can use this hash to pass arbitrary data through
         * to your template.
         */
        [option: string]: any;
    }

    interface Hooks extends compilation.CompilationHooks {
        htmlWebpackPluginBeforeHtmlGeneration: AsyncSeriesWaterfallHook<{
            assets: {
                publicPath: string;
                js: EntryObject[];
                css: EntryObject[];
            };
            outputName: string;
            plugin: HtmlWebpackPlugin;
        }>;
        htmlWebpackPluginBeforeHtmlProcessing: AsyncSeriesWaterfallHook<{
            html: string;
            assets: {
                publicPath: string;
                js: EntryObject[];
                css: EntryObject[];
            };
            outputName: string;
            plugin: HtmlWebpackPlugin;
        }>;
        htmlWebpackPluginAfterHtmlProcessing: AsyncSeriesWaterfallHook<{
            html: string;
            assets: {
                publicPath: string;
                js: EntryObject[];
                css: EntryObject[];
            };
            outputName: string;
            plugin: HtmlWebpackPlugin;
        }>;
        htmlWebpackPluginAlterAssetTags: AsyncSeriesWaterfallHook<{
            head: HtmlTagObject[];
            body: HtmlTagObject[];
            outputName: string;
            plugin: HtmlWebpackPlugin;
        }>;
        htmlWebpackPluginAfterEmit: AsyncSeriesWaterfallHook<{
            html: string;
            outputName: string;
            plugin: HtmlWebpackPlugin;
        }>;
    }

    /** @deprecated use MinifyOptions */
    type MinifyConfig = MinifyOptions;
    /** @deprecated use Options */
    type Config = Options;
}

interface EntryObject {
    /** Webpack entry or chunk name */
    entryName: string;
    /** Entry or chunk path */
    path: string;
}

interface HtmlTagObject {
    /**
     * Attributes of the html tag
     * E.g. `{'disabled': true, 'value': 'demo'}`
     */
    attributes: {
        [attributeName: string]: string | boolean;
    };
    /**
     * Wether this html must not contain innerHTML
     * @see https://www.w3.org/TR/html5/syntax.html#void-elements
     */
    voidTag: boolean;
    /**
     * The tag name e.g. `'div'`
     */
    tagName: string;
    /**
     * Inner HTML The
     */
    innerHTML?: string | undefined;
}