import { SourceMapOptions } from 'magic-string';
import { Template, TemplatePart, ParseLiteralsOptions, parseLiterals } from 'parse-literals';
import { Strategy, defaultMinifyOptions } from './strategy';
/**
 * Options for <code>minifyHTMLLiterals()</code>.
 */
export declare type Options = DefaultOptions | CustomOptions<any>;
/**
 * Options for <code>minifyHTMLLiterals()</code>, using default html-minifier
 * strategy.
 */
export interface DefaultOptions extends BaseOptions {
    /**
     * <code>html-minifier</code> options to use. Defaults to
     * <code>defaultMinifyOptions</code>, for production-ready minification.
     */
    minifyOptions?: Partial<typeof defaultMinifyOptions>;
}
/**
 * Options for <code>minifyHTMLLiterals()</code>, using a custom strategy.
 */
export interface CustomOptions<S extends Strategy> extends BaseOptions {
    /**
     * HTML minification options.
     */
    minifyOptions?: S extends Strategy<infer O> ? Partial<O> : never;
    /**
     * Override the default strategy for how to minify HTML. The default is to
     * use <code>html-minifier</code>.
     */
    strategy: S;
}
/**
 * Options for <code>minifyHTMLLiterals()</code>.
 */
export interface BaseOptions {
    /**
     * The name of the file. This is used to determine how to parse the source
     * code and for source map filenames. It may be a base name, relative, or
     * absolute path.
     */
    fileName?: string;
    /**
     * Override how source maps are generated. Set to false to disable source map
     * generation.
     *
     * @param ms the MagicString instance with code modifications
     * @param fileName the name or path of the file
     * @returns a v3 SourceMap or undefined
     */
    generateSourceMap?: ((ms: MagicStringLike, fileName: string) => SourceMap | undefined) | false;
    /**
     * The MagicString-like constructor to use. MagicString is used to replace
     * strings and generate source maps.
     *
     * Override if you want to set your own version of MagicString or change how
     * strings are overridden. Use <code>generateSourceMap</code> if you want to
     * change how source maps are created.
     */
    MagicString?: {
        new (source: string): MagicStringLike;
    };
    /**
     * Override how template literals are parsed from a source string.
     */
    parseLiterals?: typeof parseLiterals;
    /**
     * Options for <code>parseLiterals()</code>.
     */
    parseLiteralsOptions?: Partial<ParseLiteralsOptions>;
    /**
     * Determines whether or not a template should be minified. The default is to
     * minify all tagged template whose tag name contains "html" (case
     * insensitive).
     *
     * @param template the template to check
     * @returns true if the template should be minified
     */
    shouldMinify?(template: Template): boolean;
    /**
     * Determines whether or not a CSS template should be minified. The default is
     * to minify all tagged template whose tag name contains "css" (case
     * insensitive).
     *
     * @param template the template to check
     * @returns true if the template should be minified
     */
    shouldMinifyCSS?(template: Template): boolean;
    /**
     * Override custom validation or set to false to disable validation. This is
     * only useful when implementing your own strategy that may return
     * unexpected results.
     */
    validate?: Validation | false;
}
/**
 * A MagicString-like instance. <code>minify-html-literals</code> only uses a
 * subset of the MagicString API to overwrite the source code and generate
 * source maps.
 */
export interface MagicStringLike {
    generateMap(options?: Partial<SourceMapOptions>): SourceMap;
    overwrite(start: number, end: number, content: string): any;
    toString(): string;
}
/**
 * A v3 SourceMap.
 *
 * <code>magic-string> incorrectly declares the SourceMap type with a version
 * string instead of a number, so <code>minify-html-literals</code> declares
 * its own type.
 */
export interface SourceMap {
    version: number | string;
    file: string | null;
    sources: Array<string | null>;
    sourcesContent: Array<string | null>;
    names: string[];
    mappings: string;
    toString(): string;
    toUrl(): string;
}
/**
 * Validation that is executed when minifying HTML to ensure there are no
 * unexpected errors. This is to alleviate hard-to-troubleshoot errors such as
 * undefined errors.
 */
export interface Validation {
    /**
     * Throws an error if <code>strategy.getPlaceholder()</code> does not return
     * a valid placeholder string.
     *
     * @param placeholder the placeholder to check
     */
    ensurePlaceholderValid(placeholder: any): void;
    /**
     * Throws an error if <code>strategy.splitHTMLByPlaceholder()</code> does not
     * return an HTML part string for each template part.
     *
     * @param parts the template parts that generated the strings
     * @param htmlParts the split HTML strings
     */
    ensureHTMLPartsValid(parts: TemplatePart[], htmlParts: string[]): void;
}
/**
 * The result of a call to <code>minifyHTMLLiterals()</code>.
 */
export interface Result {
    /**
     * The minified code.
     */
    code: string;
    /**
     * Optional v3 SourceMap for the code.
     */
    map: SourceMap | undefined;
}
/**
 * The default method to generate a SourceMap. It will generate the SourceMap
 * from the provided MagicString instance using "fileName.map" as the file and
 * "fileName" as the source.
 *
 * @param ms the MagicString instance with code modifications
 * @param fileName the name of the source file
 * @returns a v3 SourceMap
 */
export declare function defaultGenerateSourceMap(ms: MagicStringLike, fileName: string): SourceMap;
/**
 * The default method to determine whether or not to minify a template. It will
 * return true for all tagged templates whose tag name contains "html" (case
 * insensitive).
 *
 * @param template the template to check
 * @returns true if the template should be minified
 */
export declare function defaultShouldMinify(template: Template): boolean;
/**
 * The default method to determine whether or not to minify a CSS template. It
 * will return true for all tagged templates whose tag name contains "css" (case
 * insensitive).
 *
 * @param template the template to check
 * @returns true if the template should be minified
 */
export declare function defaultShouldMinifyCSS(template: Template): boolean;
/**
 * The default validation.
 */
export declare const defaultValidation: Validation;
/**
 * Minifies all HTML template literals in the provided source string.
 *
 * @param source the source code
 * @param options minification options
 * @returns the minified code, or null if no minification occurred.
 */
export declare function minifyHTMLLiterals(source: string, options?: DefaultOptions): Result | null;
/**
 * Minifies all HTML template literals in the provided source string.
 *
 * @param source the source code
 * @param options minification options
 * @returns the minified code, or null if no minification occurred.
 */
export declare function minifyHTMLLiterals<S extends Strategy>(source: string, options?: CustomOptions<S>): Result | null;