/***********************************************************************

  A JavaScript tokenizer / parser / beautifier / compressor.
  https://github.com/mishoo/UglifyJS2

  -------------------------------- (C) ---------------------------------

                           Author: Mihai Bazon
                         <mihai.bazon@gmail.com>
                       http://mihai.bazon.net/blog

  Distributed under the BSD license:

    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:

        * Redistributions of source code must retain the above
          copyright notice, this list of conditions and the following
          disclaimer.

        * Redistributions in binary form must reproduce the above
          copyright notice, this list of conditions and the following
          disclaimer in the documentation and/or other materials
          provided with the distribution.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    SUCH DAMAGE.

 ***********************************************************************/

"use strict";

var ast = require("./ast");
var TreeWalker = ast.TreeWalker;
var AST_Token = ast.AST_Token;
var AST_Node = ast.AST_Node;
var AST_Statement = ast.AST_Statement;
var AST_Debugger = ast.AST_Debugger;
var AST_Directive = ast.AST_Directive;
var AST_SimpleStatement = ast.AST_SimpleStatement;
var AST_Block = ast.AST_Block;
var AST_BlockStatement = ast.AST_BlockStatement;
var AST_EmptyStatement = ast.AST_EmptyStatement;
var AST_LabeledStatement = ast.AST_LabeledStatement;
var AST_Do = ast.AST_Do;
var AST_While = ast.AST_While;
var AST_For = ast.AST_For;
var AST_ForIn = ast.AST_ForIn;
var AST_With = ast.AST_With;
var AST_Scope = ast.AST_Scope;
var AST_Toplevel = ast.AST_Toplevel;
var AST_Lambda = ast.AST_Lambda;
var AST_Accessor = ast.AST_Accessor;
var AST_Function = ast.AST_Function;
var AST_Defun = ast.AST_Defun;
var AST_Return = ast.AST_Return;
var AST_Throw = ast.AST_Throw;
var AST_Break = ast.AST_Break;
var AST_Continue = ast.AST_Continue;
var AST_If = ast.AST_If;
var AST_Switch = ast.AST_Switch;
var AST_SwitchBranch = ast.AST_SwitchBranch;
var AST_Default = ast.AST_Default;
var AST_Case = ast.AST_Case;
var AST_Try = ast.AST_Try;
var AST_Catch = ast.AST_Catch;
var AST_Finally = ast.AST_Finally;
var AST_Definitions = ast.AST_Definitions;
var AST_Var = ast.AST_Var;
var AST_VarDef = ast.AST_VarDef;
var AST_Call = ast.AST_Call;
var AST_New = ast.AST_New;
var AST_Sequence = ast.AST_Sequence;
var AST_PropAccess = ast.AST_PropAccess;
var AST_Dot = ast.AST_Dot;
var AST_Sub = ast.AST_Sub;
var AST_Unary = ast.AST_Unary;
var AST_UnaryPrefix = ast.AST_UnaryPrefix;
var AST_UnaryPostfix = ast.AST_UnaryPostfix;
var AST_Binary = ast.AST_Binary;
var AST_Conditional = ast.AST_Conditional;
var AST_Assign = ast.AST_Assign;
var AST_Array = ast.AST_Array;
var AST_Object = ast.AST_Object;
var AST_ObjectProperty = ast.AST_ObjectProperty;
var AST_ObjectKeyVal = ast.AST_ObjectKeyVal;
var AST_ObjectSetter = ast.AST_ObjectSetter;
var AST_ObjectGetter = ast.AST_ObjectGetter;
var AST_Symbol = ast.AST_Symbol;
var AST_SymbolAccessor = ast.AST_SymbolAccessor;
var AST_SymbolVar = ast.AST_SymbolVar;
var AST_SymbolFunarg = ast.AST_SymbolFunarg;
var AST_SymbolDefun = ast.AST_SymbolDefun;
var AST_SymbolLambda = ast.AST_SymbolLambda;
var AST_SymbolCatch = ast.AST_SymbolCatch;
var AST_Label = ast.AST_Label;
var AST_SymbolRef = ast.AST_SymbolRef;
var AST_LabelRef = ast.AST_LabelRef;
var AST_This = ast.AST_This;
var AST_Constant = ast.AST_Constant;
var AST_String = ast.AST_String;
var AST_Number = ast.AST_Number;
var AST_RegExp = ast.AST_RegExp;
var AST_Atom = ast.AST_Atom;
var AST_Null = ast.AST_Null;
var AST_Hole = ast.AST_Hole;
var AST_Boolean = ast.AST_Boolean;
var AST_False = ast.AST_False;
var AST_True = ast.AST_True;

(function() {
    function normalize_directives(body) {
        var in_directive = true;
        for (var i = 0; i < body.length; i++) {
            if (in_directive && body[i] instanceof AST_Statement && body[i].body instanceof AST_String) {
                body[i] = new AST_Directive({
                    start: body[i].start,
                    end: body[i].end,
                    value: body[i].body.value
                });
            } else if (in_directive && !(body[i] instanceof AST_Statement && body[i].body instanceof AST_String)) {
                in_directive = false;
            }
        }
        return body;
    }

    var MOZ_TO_ME = {
        Program: function(M) {
            return new AST_Toplevel({
                start: my_start_token(M),
                end: my_end_token(M),
                body: normalize_directives(M.body.map(from_moz))
            });
        },
        FunctionDeclaration: function(M) {
            return new AST_Defun({
                start: my_start_token(M),
                end: my_end_token(M),
                name: from_moz(M.id),
                argnames: M.params.map(from_moz),
                body: normalize_directives(from_moz(M.body).body)
            });
        },
        FunctionExpression: function(M) {
            return new AST_Function({
                start: my_start_token(M),
                end: my_end_token(M),
                name: from_moz(M.id),
                argnames: M.params.map(from_moz),
                body: normalize_directives(from_moz(M.body).body)
            });
        },
        ExpressionStatement: function(M) {
            return new AST_SimpleStatement({
                start: my_start_token(M),
                end: my_end_token(M),
                body: from_moz(M.expression)
            });
        },
        TryStatement: function(M) {
            var handlers = M.handlers || [M.handler];
            if (handlers.length > 1 || M.guardedHandlers && M.guardedHandlers.length) {
                throw new Error("Multiple catch clauses are not supported.");
            }
            return new AST_Try({
                start    : my_start_token(M),
                end      : my_end_token(M),
                body     : from_moz(M.block).body,
                bcatch   : from_moz(handlers[0]),
                bfinally : M.finalizer ? new AST_Finally(from_moz(M.finalizer)) : null
            });
        },
        Property: function(M) {
            var key = M.key;
            var args = {
                start    : my_start_token(key),
                end      : my_end_token(M.value),
                key      : key.type == "Identifier" ? key.name : key.value,
                value    : from_moz(M.value)
            };
            if (M.kind == "init") return new AST_ObjectKeyVal(args);
            args.key = new AST_SymbolAccessor({
                name: args.key
            });
            args.value = new AST_Accessor(args.value);
            if (M.kind == "get") return new AST_ObjectGetter(args);
            if (M.kind == "set") return new AST_ObjectSetter(args);
        },
        ArrayExpression: function(M) {
            return new AST_Array({
                start    : my_start_token(M),
                end      : my_end_token(M),
                elements : M.elements.map(function(elem) {
                    return elem === null ? new AST_Hole() : from_moz(elem);
                })
            });
        },
        ObjectExpression: function(M) {
            return new AST_Object({
                start      : my_start_token(M),
                end        : my_end_token(M),
                properties : M.properties.map(function(prop) {
                    prop.type = "Property";
                    return from_moz(prop)
                })
            });
        },
        SequenceExpression: function(M) {
            return new AST_Sequence({
                start      : my_start_token(M),
                end        : my_end_token(M),
                expressions: M.expressions.map(from_moz)
            });
        },
        MemberExpression: function(M) {
            return new (M.computed ? AST_Sub : AST_Dot)({
                start      : my_start_token(M),
                end        : my_end_token(M),
                property   : M.computed ? from_moz(M.property) : M.property.name,
                expression : from_moz(M.object)
            });
        },
        SwitchCase: function(M) {
            return new (M.test ? AST_Case : AST_Default)({
                start      : my_start_token(M),
                end        : my_end_token(M),
                expression : from_moz(M.test),
                body       : M.consequent.map(from_moz)
            });
        },
        VariableDeclaration: function(M) {
            return new AST_Var({
                start       : my_start_token(M),
                end         : my_end_token(M),
                definitions : M.declarations.map(from_moz)
            });
        },
        Literal: function(M) {
            var val = M.value, args = {
                start  : my_start_token(M),
                end    : my_end_token(M)
            };
            if (val === null) return new AST_Null(args);
            var rx = M.regex;
            if (rx && rx.pattern) {
                // RegExpLiteral as per ESTree AST spec
                args.value = new RegExp(rx.pattern, rx.flags);
                args.value.raw_source = rx.pattern;
                return new AST_RegExp(args);
            } else if (rx) {
                // support legacy RegExp
                args.value = M.regex && M.raw ? M.raw : val;
                return new AST_RegExp(args);
            }
            switch (typeof val) {
              case "string":
                args.value = val;
                return new AST_String(args);
              case "number":
                args.value = val;
                return new AST_Number(args);
              case "boolean":
                return new (val ? AST_True : AST_False)(args);
            }
        },
        Identifier: function(M) {
            var p = FROM_MOZ_STACK[FROM_MOZ_STACK.length - 2];
            return new (  p.type == "LabeledStatement" ? AST_Label
                        : p.type == "VariableDeclarator" && p.id === M ? AST_SymbolVar
                        : p.type == "FunctionExpression" ? (p.id === M ? AST_SymbolLambda : AST_SymbolFunarg)
                        : p.type == "FunctionDeclaration" ? (p.id === M ? AST_SymbolDefun : AST_SymbolFunarg)
                        : p.type == "CatchClause" ? AST_SymbolCatch
                        : p.type == "BreakStatement" || p.type == "ContinueStatement" ? AST_LabelRef
                        : AST_SymbolRef)({
                            start : my_start_token(M),
                            end   : my_end_token(M),
                            name  : M.name
                        });
        }
    };

    MOZ_TO_ME.UpdateExpression =
    MOZ_TO_ME.UnaryExpression = function To_Moz_Unary(M) {
        var prefix = "prefix" in M ? M.prefix
            : M.type == "UnaryExpression" ? true : false;
        return new (prefix ? AST_UnaryPrefix : AST_UnaryPostfix)({
            start      : my_start_token(M),
            end        : my_end_token(M),
            operator   : M.operator,
            expression : from_moz(M.argument)
        });
    };

    map("EmptyStatement", AST_EmptyStatement);
    map("BlockStatement", AST_BlockStatement, "body@body");
    map("IfStatement", AST_If, "test>condition, consequent>body, alternate>alternative");
    map("LabeledStatement", AST_LabeledStatement, "label>label, body>body");
    map("BreakStatement", AST_Break, "label>label");
    map("ContinueStatement", AST_Continue, "label>label");
    map("WithStatement", AST_With, "object>expression, body>body");
    map("SwitchStatement", AST_Switch, "discriminant>expression, cases@body");
    map("ReturnStatement", AST_Return, "argument>value");
    map("ThrowStatement", AST_Throw, "argument>value");
    map("WhileStatement", AST_While, "test>condition, body>body");
    map("DoWhileStatement", AST_Do, "test>condition, body>body");
    map("ForStatement", AST_For, "init>init, test>condition, update>step, body>body");
    map("ForInStatement", AST_ForIn, "left>init, right>object, body>body");
    map("DebuggerStatement", AST_Debugger);
    map("VariableDeclarator", AST_VarDef, "id>name, init>value");
    map("CatchClause", AST_Catch, "param>argname, body%body");

    map("ThisExpression", AST_This);
    map("BinaryExpression", AST_Binary, "operator=operator, left>left, right>right");
    map("LogicalExpression", AST_Binary, "operator=operator, left>left, right>right");
    map("AssignmentExpression", AST_Assign, "operator=operator, left>left, right>right");
    map("ConditionalExpression", AST_Conditional, "test>condition, consequent>consequent, alternate>alternative");
    map("NewExpression", AST_New, "callee>expression, arguments@args");
    map("CallExpression", AST_Call, "callee>expression, arguments@args");

    def_to_moz(AST_Toplevel, function To_Moz_Program(M) {
        return to_moz_scope("Program", M);
    });

    def_to_moz(AST_Defun, function To_Moz_FunctionDeclaration(M) {
        return {
            type: "FunctionDeclaration",
            id: to_moz(M.name),
            params: M.argnames.map(to_moz),
            body: to_moz_scope("BlockStatement", M)
        }
    });

    def_to_moz(AST_Function, function To_Moz_FunctionExpression(M) {
        return {
            type: "FunctionExpression",
            id: to_moz(M.name),
            params: M.argnames.map(to_moz),
            body: to_moz_scope("BlockStatement", M)
        }
    });

    def_to_moz(AST_Directive, function To_Moz_Directive(M) {
        return {
            type: "ExpressionStatement",
            expression: {
                type: "Literal",
                value: M.value
            }
        };
    });

    def_to_moz(AST_SimpleStatement, function To_Moz_ExpressionStatement(M) {
        return {
            type: "ExpressionStatement",
            expression: to_moz(M.body)
        };
    });

    def_to_moz(AST_SwitchBranch, function To_Moz_SwitchCase(M) {
        return {
            type: "SwitchCase",
            test: to_moz(M.expression),
            consequent: M.body.map(to_moz)
        };
    });

    def_to_moz(AST_Try, function To_Moz_TryStatement(M) {
        return {
            type: "TryStatement",
            block: to_moz_block(M),
            handler: to_moz(M.bcatch),
            guardedHandlers: [],
            finalizer: to_moz(M.bfinally)
        };
    });

    def_to_moz(AST_Catch, function To_Moz_CatchClause(M) {
        return {
            type: "CatchClause",
            param: to_moz(M.argname),
            guard: null,
            body: to_moz_block(M)
        };
    });

    def_to_moz(AST_Definitions, function To_Moz_VariableDeclaration(M) {
        return {
            type: "VariableDeclaration",
            kind: "var",
            declarations: M.definitions.map(to_moz)
        };
    });

    def_to_moz(AST_Sequence, function To_Moz_SequenceExpression(M) {
        return {
            type: "SequenceExpression",
            expressions: M.expressions.map(to_moz)
        };
    });

    def_to_moz(AST_PropAccess, function To_Moz_MemberExpression(M) {
        var isComputed = M instanceof AST_Sub;
        return {
            type: "MemberExpression",
            object: to_moz(M.expression),
            computed: isComputed,
            property: isComputed ? to_moz(M.property) : {type: "Identifier", name: M.property}
        };
    });

    def_to_moz(AST_Unary, function To_Moz_Unary(M) {
        return {
            type: M.operator == "++" || M.operator == "--" ? "UpdateExpression" : "UnaryExpression",
            operator: M.operator,
            prefix: M instanceof AST_UnaryPrefix,
            argument: to_moz(M.expression)
        };
    });

    def_to_moz(AST_Binary, function To_Moz_BinaryExpression(M) {
        return {
            type: M.operator == "&&" || M.operator == "||" ? "LogicalExpression" : "BinaryExpression",
            left: to_moz(M.left),
            operator: M.operator,
            right: to_moz(M.right)
        };
    });

    def_to_moz(AST_Array, function To_Moz_ArrayExpression(M) {
        return {
            type: "ArrayExpression",
            elements: M.elements.map(to_moz)
        };
    });

    def_to_moz(AST_Object, function To_Moz_ObjectExpression(M) {
        return {
            type: "ObjectExpression",
            properties: M.properties.map(to_moz)
        };
    });

    def_to_moz(AST_ObjectProperty, function To_Moz_Property(M) {
        var key = {
            type: "Literal",
            value: M.key instanceof AST_SymbolAccessor ? M.key.name : M.key
        };
        var kind;
        if (M instanceof AST_ObjectKeyVal) {
            kind = "init";
        } else
        if (M instanceof AST_ObjectGetter) {
            kind = "get";
        } else
        if (M instanceof AST_ObjectSetter) {
            kind = "set";
        }
        return {
            type: "Property",
            kind: kind,
            key: key,
            value: to_moz(M.value)
        };
    });

    def_to_moz(AST_Symbol, function To_Moz_Identifier(M) {
        var def = M.definition();
        return {
            type: "Identifier",
            name: def ? def.mangled_name || def.name : M.name
        };
    });

    def_to_moz(AST_RegExp, function To_Moz_RegExpLiteral(M) {
        var flags = M.value.toString().match(/[gimuy]*$/)[0];
        var value = "/" + M.value.raw_source + "/" + flags;
        return {
            type: "Literal",
            value: value,
            raw: value,
            regex: {
                pattern: M.value.raw_source,
                flags: flags
            }
        };
    });

    def_to_moz(AST_Constant, function To_Moz_Literal(M) {
        var value = M.value;
        if (typeof value === 'number' && (value < 0 || (value === 0 && 1 / value < 0))) {
            return {
                type: "UnaryExpression",
                operator: "-",
                prefix: true,
                argument: {
                    type: "Literal",
                    value: -value,
                    raw: M.start.raw
                }
            };
        }
        return {
            type: "Literal",
            value: value,
            raw: M.start.raw
        };
    });

    def_to_moz(AST_Atom, function To_Moz_Atom(M) {
        return {
            type: "Identifier",
            name: String(M.value)
        };
    });

    AST_Boolean.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
    AST_Null.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
    AST_Hole.DEFMETHOD("to_mozilla_ast", function To_Moz_ArrayHole() { return null });

    AST_Block.DEFMETHOD("to_mozilla_ast", AST_BlockStatement.prototype.to_mozilla_ast);
    AST_Lambda.DEFMETHOD("to_mozilla_ast", AST_Function.prototype.to_mozilla_ast);

    /* -----[ tools ]----- */

    function raw_token(moznode) {
        if (moznode.type == "Literal") {
            return moznode.raw != null ? moznode.raw : moznode.value + "";
        }
    }

    function my_start_token(moznode) {
        var loc = moznode.loc, start = loc && loc.start;
        var range = moznode.range;
        return new AST_Token({
            file    : loc && loc.source,
            line    : start && start.line,
            col     : start && start.column,
            pos     : range ? range[0] : moznode.start,
            endline : start && start.line,
            endcol  : start && start.column,
            endpos  : range ? range[0] : moznode.start,
            raw     : raw_token(moznode),
        });
    }

    function my_end_token(moznode) {
        var loc = moznode.loc, end = loc && loc.end;
        var range = moznode.range;
        return new AST_Token({
            file    : loc && loc.source,
            line    : end && end.line,
            col     : end && end.column,
            pos     : range ? range[1] : moznode.end,
            endline : end && end.line,
            endcol  : end && end.column,
            endpos  : range ? range[1] : moznode.end,
            raw     : raw_token(moznode),
        });
    }

    function map(moztype, mytype, propmap) {
        var moz_to_me = "function From_Moz_" + moztype + "(M){\n";
        moz_to_me += "return new U2." + mytype.name + "({\n" +
            "start: my_start_token(M),\n" +
            "end: my_end_token(M)";

        var me_to_moz = "function To_Moz_" + moztype + "(M){\n";
        me_to_moz += "return {\n" +
            "type: " + JSON.stringify(moztype);

        if (propmap) propmap.split(/\s*,\s*/).forEach(function(prop) {
            var m = /([a-z0-9$_]+)(=|@|>|%)([a-z0-9$_]+)/i.exec(prop);
            if (!m) throw new Error("Can't understand property map: " + prop);
            var moz = m[1], how = m[2], my = m[3];
            moz_to_me += ",\n" + my + ": ";
            me_to_moz += ",\n" + moz + ": ";
            switch (how) {
                case "@":
                    moz_to_me += "M." + moz + ".map(from_moz)";
                    me_to_moz += "M." +  my + ".map(to_moz)";
                    break;
                case ">":
                    moz_to_me += "from_moz(M." + moz + ")";
                    me_to_moz += "to_moz(M." + my + ")";
                    break;
                case "=":
                    moz_to_me += "M." + moz;
                    me_to_moz += "M." + my;
                    break;
                case "%":
                    moz_to_me += "from_moz(M." + moz + ").body";
                    me_to_moz += "to_moz_block(M)";
                    break;
                default:
                    throw new Error("Can't understand operator in propmap: " + prop);
            }
        });

        moz_to_me += "\n})\n}";
        me_to_moz += "\n}\n}";

        //moz_to_me = parse(moz_to_me).print_to_string({ beautify: true });
        //me_to_moz = parse(me_to_moz).print_to_string({ beautify: true });
        //console.log(moz_to_me);

        moz_to_me = new Function("U2", "my_start_token", "my_end_token", "from_moz", "return(" + moz_to_me + ")")(
            ast, my_start_token, my_end_token, from_moz
        );
        me_to_moz = new Function("to_moz", "to_moz_block", "to_moz_scope", "return(" + me_to_moz + ")")(
            to_moz, to_moz_block, to_moz_scope
        );
        MOZ_TO_ME[moztype] = moz_to_me;
        def_to_moz(mytype, me_to_moz);
    }

    var FROM_MOZ_STACK = null;

    function from_moz(node) {
        FROM_MOZ_STACK.push(node);
        var ret = node != null ? MOZ_TO_ME[node.type](node) : null;
        FROM_MOZ_STACK.pop();
        return ret;
    }

    AST_Node.from_mozilla_ast = function(node) {
        var save_stack = FROM_MOZ_STACK;
        FROM_MOZ_STACK = [];
        var ast = from_moz(node);
        FROM_MOZ_STACK = save_stack;
        ast.walk(new TreeWalker(function(node) {
            if (node instanceof AST_LabelRef) {
                for (var level = 0, parent; parent = this.parent(level); level++) {
                    if (parent instanceof AST_Scope) break;
                    if (parent instanceof AST_LabeledStatement && parent.label.name == node.name) {
                        node.thedef = parent.label;
                        break;
                    }
                }
                if (!node.thedef) {
                    var s = node.start;
                    js_error("Undefined label " + node.name, s.file, s.line, s.col, s.pos);
                }
            }
        }));
        return ast;
    };

    function set_moz_loc(mynode, moznode, myparent) {
        var start = mynode.start;
        var end = mynode.end;
        if (start.pos != null && end.endpos != null) {
            moznode.range = [start.pos, end.endpos];
        }
        if (start.line) {
            moznode.loc = {
                start: {line: start.line, column: start.col},
                end: end.endline ? {line: end.endline, column: end.endcol} : null
            };
            if (start.file) {
                moznode.loc.source = start.file;
            }
        }
        return moznode;
    }

    function def_to_moz(mytype, handler) {
        mytype.DEFMETHOD("to_mozilla_ast", function() {
            return set_moz_loc(this, handler(this));
        });
    }

    function to_moz(node) {
        return node != null ? node.to_mozilla_ast() : null;
    }

    function to_moz_block(node) {
        return {
            type: "BlockStatement",
            body: node.body.map(to_moz)
        };
    }

    function to_moz_scope(type, node) {
        var body = node.body.map(to_moz);
        if (node.body[0] instanceof AST_SimpleStatement && node.body[0].body instanceof AST_String) {
            body.unshift(to_moz(new AST_EmptyStatement(node.body[0])));
        }
        return {
            type: type,
            body: body
        };
    }
})();