/// <reference types="source-map" />

import * as MOZ_SourceMap from "source-map";

declare namespace UglifyJS {
    interface Tokenizer {
        /**
         * The type of this token.
         * Can be "num", "string", "regexp", "operator", "punc", "atom", "name", "keyword", "comment1" or "comment2".
         * "comment1" and "comment2" are for single-line, respectively multi-line comments.
         */
        type: string;

        /**
         * The name of the file where this token originated from. Useful when compressing multiple files at once to generate the proper source map.
         */
        file: string;

        /**
         * The "value" of the token.
         * That's additional information and depends on the token type: "num", "string" and "regexp" tokens you get their literal value.
         * - For "operator" you get the operator.
         * - For "punc" it's the punctuation sign (parens, comma, semicolon etc).
         * - For "atom", "name" and "keyword" it's the name of the identifier
         * - For comments it's the body of the comment (excluding the initial "//" and "/*".
         */
        value: string;

        /**
         * The line number of this token in the original code.
         * 1-based index.
         */
        line: number;

        /**
         * The column number of this token in the original code.
         * 0-based index.
         */
        col: number;

        /**
         * Short for "newline before", it's a boolean that tells us whether there was a newline before this node in the original source. It helps for automatic semicolon insertion.
         * For multi-line comments in particular this will be set to true if there either was a newline before this comment, or * * if this comment contains a newline.
         */
        nlb: boolean;

        /**
         * This doesn't apply for comment tokens, but for all other token types it will be an array of comment tokens that were found before.
         */
        comments_before: string[];
    }

    interface AST_Node {
        // The first token of this node
        start: AST_Node;

        // The last token of this node
        end: AST_Node;

        transform(tt: TreeTransformer): AST_Toplevel;
    }

    interface AST_Toplevel extends AST_Node {
        // UglifyJS contains a scope analyzer which figures out variable/function definitions, references etc.
        // You need to call it manually before compression or mangling.
        // The figure_out_scope method is defined only on the AST_Toplevel node.
        figure_out_scope(): void;

        // Get names that are optimized for GZip compression (names will be generated using the most frequent characters first)
        compute_char_frequency(): void;

        mangle_names(): void;

        print(stream: OutputStream): void;

        print_to_string(options?: BeautifierOptions): string;
    }

    interface MinifyOptions {
        spidermonkey?: boolean | undefined;
        outSourceMap?: string | undefined;
        sourceRoot?: string | undefined;
        inSourceMap?: string | undefined;
        fromString?: boolean | undefined;
        warnings?: boolean | undefined;
        mangle?: Object | undefined;
        output?: MinifyOutput | undefined;
        compress?: Object | undefined;
    }

    interface MinifyOutput {
        code: string;
        map: string;
    }

    function minify(files: string | Array<string>, options?: MinifyOptions): MinifyOutput;

    interface ParseOptions {
        // Default is false
        strict?: boolean | undefined;

        // Input file name, default is null
        filename?: string | undefined;

        // Default is null
        toplevel?: AST_Toplevel | undefined;
    }

    /**
     * The parser creates a custom abstract syntax tree given a piece of JavaScript code.
     * Perhaps you should read about the AST first.
     */
    function parse(code: string, options?: ParseOptions): AST_Toplevel;

    interface BeautifierOptions {
        /**
         * Start indentation on every line (only when `beautify`)
         */
        indent_start?: number | undefined;

        /**
         * Indentation level (only when `beautify`)
         */
        indent_level?: number | undefined;

        /**
         * Quote all keys in object literals?
         */
        quote_keys?: boolean | undefined;

        /**
         * Add a space after colon signs?
         */
        space_colon?: boolean | undefined;

        /**
         * Output ASCII-safe? (encodes Unicode characters as ASCII)
         */
        ascii_only?: boolean | undefined;

        /**
         * Escape "</script"?
         */
        inline_script?: boolean | undefined;

        /**
         * Informative maximum line width (for beautified output)
         */
        width?: number | undefined;

        /**
         * Maximum line length (for non-beautified output)
         */
        max_line_len?: boolean | number | undefined;

        /**
         * Output IE-safe code?
         */
        ie_proof?: boolean | undefined;

        /**
         * Beautify output?
         */
        beautify?: boolean | undefined;

        /**
         * Output a source map
         */
        source_map?: SourceMap | undefined;

        /**
         * Use brackets every time?
         */
        bracketize?: boolean | undefined;

        /**
         * Output comments?
         */
        comments?: boolean | undefined;

        /**
         * Use semicolons to separate statements? (otherwise, newlines)
         */
        semicolons?: boolean | undefined;
    }

    interface OutputStream {
        // Return the output so far as a string
        get(): string;
        toString(): string;

        // Insert one indentation string (usually 4 characters).
        // Optionally pass true to indent half the width (I'm using that for case and default lines in switch blocks.
        // If beautify is off, this function does nothing.
        indent(half?: boolean): void;

        // Return the current indentation width (not level; for example if we're in level 2 and indent_level is 4, this method would return 8.
        indentation(): number;

        // return the width of the current line text minus indentation.
        current_width(): number;

        // Return true if current_width() is bigger than options.width (assuming options.width is non-null, non-zero).
        should_break(): boolean;

        // If beautification is on, this inserts a newline. Otherwise it does nothing.
        newline(): void;

        // Include the given string into the output, adjusting current_line, current_col and current_pos accordingly.
        print(str: string): void;

        // If beautification is on this always includes a space character.
        // Otherwise it saves a hint somewhere that a space might be needed at current point.
        // The space will go in at the next output but only when absolutely required, for example it will insert the space in return 10 but not in return"stuff".
        space(): void;

        // Inserts a comma, and calls space() — that is, if beautification is on you'll get a space after the comma.
        comma(): void;

        // Inserts a colon, and calls space() if options.space_colon is set.
        colon(): void;

        // Returns the last printed chunk.
        last(): string;

        // If beautification is on it always inserts a semicolon.
        // Otherwise it saves a hint that a semicolon might be needed at current point.
        // The semicolon is inserted when the next output comes in, only if required to not break the JS syntax.
        semicolon(): void;

        // Always inserts a semicolon and clears the hint that a semicolon might be needed.
        force_semicolon(): void;

        // Encodes any non-ASCII characters in string with JavaScript's conventions (using \uCODE).
        to_ascii(str: string): void;

        // Prints an identifier. If options.ascii_only is set, non-ASCII chars will be encoded with JavaScript conventions.
        print_name(name: string): void;

        // Prints a string. It adds quotes automatically.
        // It prefers double-quotes, but will actually count any quotes in the string and will use single-quotes if the output proves to be shorter (depending on how many backslashes it has to insert).
        // It encodes to ASCII if options.ascii_only is set.
        print_string(str: string): void;

        // Returns the width of the next indentation level. For example if current level is 2 and options.indent_level is 4, it'll return 12.
        next_indent(): number;

        // Sets the current indentation to col (column), calls the function and thereafter restores the previous indentation level.
        // If beautification is off it simply calls func.
        with_indent(col: number, func: Function): void;

        // This is used to output blocks in curly brackets.
        // It'll print an open bracket at current point, then call newline() and with the next indentation level it calls your func.
        // Lastly, it'll print an indented closing bracket. As usual, if beautification is off you'll just get {x} where x is whatever func outputs.
        with_block(func: Function): void;

        // Adds parens around the output that your function prints.
        with_parens(func: Function): void;

        // Adds square brackets around the output that your function prints.
        with_square(func: Function): void;

        // If options.source_map is set, this will generate a source mapping between the given token (which should be an AST_Token-like object) and the current line/col.
        // The name is optional; in most cases it will be inferred from the token.
        add_mapping(token: AST_Node, name?: string): void;

        // Returns the option with the given name.
        option(name: string): any;

        // Returns the current line in the output (1-based).
        line(): number;

        // Returns the current column in the output (zero-based).
        col(): number;

        // Push the given node into an internal stack. This is used to keep track of current node's parent(s).
        push_node(node: AST_Node): void;

        // Pops the top of the stack and returns it.
        pop_node(): AST_Node;

        // Returns that internal stack.
        stack(): any;

        // Returns the n-th parent node (where zero means the direct parent).
        parent(n: number): AST_Node;
    }

    /**
     * The code generator is a recursive process of getting back source code from an AST returned by the parser.
     * Every AST node has a “print” method that takes an OutputStream and dumps the code from that node into it.
     * The stream object supports a lot of options that control the output.
     * You can specify whether you'd like to get human-readable (indented) output, the indentation level, whether you'd like to quote all properties in object literals etc.
     */
    function OutputStream(options?: BeautifierOptions): OutputStream;

    interface SourceMapOptions {
        /**
         * The compressed file name
         */
        file?: string | undefined;

        /**
         * The root URL to the original sources
         */
        root?: string | undefined;

        /**
         * The input source map.
         * Useful when you compress code that was generated from some other source (possibly other programming language).
         * If you have an input source map, pass it in this argument and UglifyJS will generate a mapping that maps back
         * to the original source (as opposed to the compiled code that you are compressing).
         */
        orig?: Object | JSON | undefined;
    }

    interface SourceMap {
        add(
            source: string,
            gen_line: number,
            gen_col: number,
            orig_line: number,
            orig_col: number,
            name?: string,
        ): void;
        get(): MOZ_SourceMap.SourceMapGenerator;
        toString(): string;
    }

    /**
     * The output stream keeps track of the current line/column in the output and can trivially generate a source mapping to the original code via Mozilla's source-map library.
     * To use this functionality, you must load this library (it's automatically require-d by UglifyJS in the NodeJS version, but in a browser you must load it yourself)
     * and make it available via the global MOZ_SourceMap variable.
     */
    function SourceMap(options?: SourceMapOptions): SourceMap;

    interface CompressorOptions {
        // Join consecutive statemets with the “comma operator”
        sequences?: boolean | undefined;

        // Optimize property access: a["foo"] → a.foo
        properties?: boolean | undefined;

        // Discard unreachable code
        dead_code?: boolean | undefined;

        // Discard “debugger” statements
        drop_debugger?: boolean | undefined;

        // Some unsafe optimizations (see below)
        unsafe?: boolean | undefined;

        // Optimize if-s and conditional expressions
        conditionals?: boolean | undefined;

        // Optimize comparisons
        comparisons?: boolean | undefined;

        // Evaluate constant expressions
        evaluate?: boolean | undefined;

        // Optimize boolean expressions
        booleans?: boolean | undefined;

        // Optimize loops
        loops?: boolean | undefined;

        // Drop unused variables/functions
        unused?: boolean | undefined;

        // Hoist function declarations
        hoist_funs?: boolean | undefined;

        // Hoist variable declarations
        hoist_vars?: boolean | undefined;

        // Optimize if-s followed by return/continue
        if_return?: boolean | undefined;

        // Join var declarations
        join_vars?: boolean | undefined;

        // Try to cascade `right` into `left` in sequences
        cascade?: boolean | undefined;

        // Drop side-effect-free statements
        side_effects?: boolean | undefined;

        // Warn about potentially dangerous optimizations/code
        warnings?: boolean | undefined;

        // Global definitions
        global_defs?: Object | undefined;
    }

    /**
     * The compressor is a tree transformer which reduces the code size by applying various optimizations on the AST
     */
    function Compressor(options?: CompressorOptions): AST_Toplevel;

    // TODO
    interface TreeWalker {
    }

    type visitor = (node: AST_Node, descend: Function) => boolean;

    /**
     * UglifyJS provides a TreeWalker object and every node has a walk method that given a walker will apply your visitor to each node in the tree.
     * Your visitor can return a non-falsy value in order to prevent descending the current node.
     */
    function TreeWalker(visitor: visitor): TreeWalker;

    // TODO
    interface TreeTransformer extends TreeWalker {
    }

    /**
     * The tree transformer is a special case of a tree walker.
     * In fact it even inherits from TreeWalker and you can use the same methods, but initialization and visitor protocol are a bit different.
     */
    function TreeTransformer(before: visitor, after: visitor): TreeTransformer;
}

export = UglifyJS;