/**
 * @fileoverview Require file to end with single newline.
 * @author Nodeca Team <https://github.com/nodeca>
 */
"use strict";

//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------

module.exports = function(context) {

    //--------------------------------------------------------------------------
    // Public
    //--------------------------------------------------------------------------

    return {

        "Program": function checkBadEOF(node) {
            // Get the whole source code, not for node only.
            var src = context.getSource(),
                location = {column: 1},
                linebreakStyle = context.options[0] || "unix",
                linebreak = linebreakStyle === "unix" ? "\n" : "\r\n";
            if (src.length === 0) {
                return;
            }

            if (src[src.length - 1] !== "\n") {
                // file is not newline-terminated
                location.line = src.split(/\n/g).length;
                context.report({
                    node: node,
                    loc: location,
                    message: "Newline required at end of file but not found.",
                    fix: function(fixer) {
                        return fixer.insertTextAfterRange([0, src.length], linebreak);
                    }
                });
            }
        }

    };

};

module.exports.schema = [
    {
        "enum": ["unix", "windows"]
    }
];