// Type definitions for Showdown 1.4.1
// Project: https://github.com/coreyti/showdown
// Definitions by: cbowdon <https://github.com/cbowdon>, Pei-Tang Huang <https://github.com/tan9/>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped

declare namespace Showdown {

    interface Extension {
        /**
         * Property defines the nature of said sub-extensions and can assume 2 values:
         *
         * * `lang` - Language extensions add new markdown syntax to showdown.
         * * `output` - Output extensions (or modifiers) alter the HTML output generated by showdown
         */
        type: string;
    }

    /**
     * Regex/replace style extensions are very similar to javascript's string.replace function.
     * Two properties are given, `regex` and `replace`.
     */
    interface RegexReplaceExtension extends Extension {
        /**
         * Should be either a string or a RegExp object.
         *
         * Keep in mind that, if a string is used, it will automatically be given a g modifier,
         * that is, it is assumed to be a global replacement.
         */
        regex?: string | RegExp;

        /**
         * Can be either a string or a function. If replace is a string,
         * it can use the $1 syntax for group substitution,
         * exactly as if it were making use of string.replace (internally it does this actually).
         */
        replace?: any; // string | Replace
    }

    /**
     * If you'd just like to do everything yourself,you can specify a filter property.
     * The filter property should be a function that acts as a callback.
     */
    interface FilterExtension extends Extension {
        filter?: (text: string, converter: Converter, options?: ConverterOptions) => string;
    }

    /**
     * Defines a plugin/extension
     * Each single extension can be one of two types:
     *
     * + Language Extension -- Language extensions are ones that that add new markdown syntax to showdown. For example, say you wanted ^^youtube http://www.youtube.com/watch?v=oHg5SJYRHA0 to automatically render as an embedded YouTube video, that would be a language extension.
     * + Output Modifiers -- After showdown has run, and generated HTML, an output modifier would change that HTML. For example, say you wanted to change <div class="header"> to be <header>, that would be an output modifier.
     *
     * Each extension can provide two combinations of interfaces for showdown.
     */
    interface ShowdownExtension extends RegexReplaceExtension, FilterExtension {
    }

    interface ConverterExtensions {
      language: ShowdownExtension[];
      output: ShowdownExtension[];
    }

    interface ShowdownOptions {
        /**
         * Omit the trailing newline in a code block. Ex:
         *
         * This:
         *   <code><pre>var foo = 'bar';
         *   </pre></code>
         *
         * Becomes this:
         *   <code><pre>var foo = 'bar';</pre></code>
         *
         * @default false
         */
        omitExtraWLInCodeBlocks?: boolean;

        /**
         * Disable the automatic generation of header ids. Setting to true overrides <strong>prefixHeaderId</strong>.
         *
         * @default false
         */
        noHeaderId?: boolean;

        /**
         * Add a prefix to the generated header ids.
         * Passing a string will prefix that string to the header id.
         * Setting to true will add a generic 'section' prefix.
         *
         * @default false
         */
        prefixHeaderId?: string | boolean;

        /**
         * Enable support for setting image dimensions from within markdown syntax.
         * Examples:
         *
         *   ![foo](foo.jpg =100x80)     simple, assumes units are in px
         *   ![bar](bar.jpg =100x*)      sets the height to "auto"
         *   ![baz](baz.jpg =80%x5em)  Image with width of 80% and height of 5em
         *
         * @default false
         */
        parseImgDimensions?: boolean;


        /**
         * Set the header starting level. For instance, setting this to 3 means that
         *
         *   # foo
         *
         * will be parsed as
         *
         *   <h3>foo</h3>
         *
         * @default 1
         */
        headerLevelStart?: number;

        /**
         * Turning this on will stop showdown from interpreting underscores in the middle of
         * words as <em> and <strong> and instead treat them as literal underscores.
         *
         * Example:
         *
         *   some text with__underscores__in middle
         *
         * will be parsed as
         *
         *   <p>some text with__underscores__in middle</p>
         *
         * @default false
         */
        literalMidWordUnderscores?: boolean;

        /**
         * Enable support for strikethrough syntax.
         * `~~strikethrough~~` as `<del>strikethrough</del>`.
         *
         * @default false
         */
        strikethrough?: boolean;

        /**
         * Enable support for tables syntax. Example:
         *
         *   | h1    |    h2   |      h3 |
         *   |:------|:-------:|--------:|
         *   | 100   | [a][1]  | ![b][2] |
         *   | *foo* | **bar** | ~~baz~~ |
         *
         * See the wiki for more info
         *
         * @default false
         */
        tables?: boolean;

        /**
         * If enabled adds an id property to table headers tags.
         *
         * @default false
         */
        tablesHeaderId?: boolean;

        /**
         * Enable support for GFM code block style.
         *
         * @default true
         */
        ghCodeBlocks?: boolean;

        /**
         * Enable support for GFM takslists. Example:
         *
         *   - [x] This task is done
         *   - [ ] This is still pending
         *
         * @default false
         */
        tasklists?: boolean;

        /**
         * Prevents weird effects in live previews due to incomplete input.
         *
         * @default false
         */
        smoothLivePreview?: boolean;
    }


    interface ConverterOptions extends ShowdownOptions {

        extensions?: string | string[];
    }

    interface Converter {
        /**
         * @param text The input text (markdown)
         * @return The output HTML
         */
        makeHtml(text: string): string;

        /**
         * Setting a "local" option only affects the specified Converter object.
         *
         * @param optionKey
         * @param string
         */
        setOption(optionKey: string, value: string): void;

        /**
         * Get the option of this Converter instance.
         *
         * @param optionKey
         */
        getOption(optionKey: string): any;

        /**
         * Get the options of this Converter instance.
         */
        getOptions(): ShowdownOptions;

        /**
         * Add extension to THIS converter.
         *
         * @param extension
         * @param name
         */
        addExtension(extension: ShowdownExtension, name: string): void;

        /**
         * Use a global registered extension with THIS converter
         *
         * @param extensionName Name of the previously registered extension.
         */
        useExtension(extensionName: string): void;

        /**
         * Get all extensions.
         *
         * @return all extensions.
         */
        getAllExtensions(): ConverterExtensions;

        /**
         * Remove an extension from THIS converter.
         *
         * Note: This is a costly operation. It's better to initialize a new converter
         * and specify the extensions you wish to use.
         *
         * @param extensions
         */
        removeExtension(extensions:  ShowdownExtension[] | ShowdownExtension): void;
    }

    interface ConverterStatic {
        /**
         * @constructor
         * @param converterOptions Configuration object, describes which extensions to apply
         */
        new(converterOptions?: ConverterOptions): Converter;
    }

    /** Constructor function for a Converter */
    var Converter: ConverterStatic;

    /**
     * Setting a "global" option affects all instances of showdown
     */
    function setOption(optionKey: string, value: string): void;

    /**
     * Retrieve previous set global option.
     * @param optionKey
     */
    function getOption(optionKey: string): any;

    /**
     * Retrieve previous set global options.
     */
    function getOptions(): ShowdownOptions;

    /**
     * Reset options.
     */
    function resetOptions(): void;

    /**
     * Retrieve the default options.
     */
    function getDefaultOptions(): ShowdownOptions;

    /**
     * Register an extension.
     *
     * @prarm name
     * @param extenstion
     */
    function extension(name: string, extension: (() => ShowdownExtension) | (() => ShowdownExtension[]) | ShowdownExtension): void;

    /**
     * Get an extension.
     *
     * @param name
     * @return The extensions array.
     */
    function extension(name: string): ShowdownExtension[];

    /**
     * Get all extensions.
     *
     * @return all extensions.
     */
    function getAllExtensions(): {[name: string]: ShowdownExtension[]};

    /**
     * Remove an extension.
     *
     * @param name
     */
    function removeExtension(name: string): void;

    /**
     * Reset extensions.
     */
    function resetExtensions(): void;
}

declare module "showdown" {
    export = Showdown;
}