var shell = $('.shell').resizable({
    minHeight: 108,
    minWidth: 250
}).draggable({
    handle: '> .status-bar .title'
});
// Fake in memory filesystem
var fs = {
    'projects': {
        'baz.txt': 'Hello this is file baz.txt',
        'quux.txt': "Lorem Ispum (quux.txt)",
        'foo.txt': "Hello, World!",
        'bar.txt': "Wellcome to the bar",
        "terminal": {
            "foo": {
                "bar.txt": "hello bar",
                "baz.txt": "baz content"
            }
        }
    }
};

var path = [];
var cwd = fs;
function restore_cwd(fs, path) {
    path = path.slice();
    while (path.length) {
        var dir_name = path.shift();
        if (!is_dir(fs[dir_name])) {
            throw new Error('Internal Error Invalid directory ' +
                            $.terminal.escape_brackets(dir_name));
        }
        fs = fs[dir_name];
    }
    return fs;
}
function is_dir(obj) {
    return typeof obj === 'object';
}
function is_file(obj) {
    return typeof obj === 'string';
}
var commands = {
    cd: function(dir) {
        this.pause();
        if (dir === '/') {
            path = [];
            cwd = restore_cwd(fs, path);
        } else if (dir === '..') {
            if (path.length) {
                path.pop(); // remove from end
                cwd = restore_cwd(fs, path);
            }
        } else if (dir.match(/\//)) {
            var p = dir.replace(/\/$/, '').split('/').filter(Boolean);
            if (dir[0] !== '/') {
                p = path.concat(p);
            }
            cwd = restore_cwd(fs, p);
            path = p;
        } else if (!is_dir(cwd[dir])) {
            this.error($.terminal.escape_brackets(dir) + ' is not a directory');
        } else {
            cwd = cwd[dir];
            path.push(dir);
        }
        this.resume();
    },
    ls: function() {
        if (!is_dir(cwd)) {
            throw new Error('Internal Error Invalid directory');
        }
        var dir = Object.keys(cwd).map(function(key) {
            if (is_dir(cwd[key])) {
                return key + '/';
            }
            return key;
        });
        this.echo(dir.join('\n'));
    },
    cat: function(file) {
        if (!is_file(cwd[file])) {
            this.error($.terminal.escape_brackets(file) + " don't exists");
        } else {
            this.echo(cwd[file]);
        }
    },
    help: function() {
        this.echo('Available commands: ' + Object.keys(commands).join(', '));
    }
};
function completion(string, callback) {
    var command = this.get_command();
    var cmd = $.terminal.parse_command(command);
    function dirs(cwd) {
        return Object.keys(cwd).filter(function(key) {
            return is_dir(cwd[key]);
        }).map(function(dir) {
            return dir + '/';
        });
    }
    if (cmd.name === 'ls') {
        callback([]);
    } else if (cmd.name === 'cd') {
        var p = string.split('/').filter(Boolean);
        if (p.length === 1) {
            if (string[0] === '/') {
                callback(dirs(fs));
            } else {
                callback(dirs(cwd));
            }
        } else {
            if (string[0] !== '/') {
                p = path.concat(p);
            }
            if (string[string.length - 1] !== '/') {
                p.pop();
            }
            var prefix = string.replace(/\/[^/]*$/, '');
            callback(dirs(restore_cwd(fs, p)).map(function(dir) {
                return prefix + '/' + dir;
            }));
        }
    } else if (cmd.name === 'cat') {
        var files = Object.keys(cwd).filter(function(key) {
            return is_file(cwd[key]);
        });
        callback(files);
    } else {
        callback(Object.keys(commands));
    }
}
var term = $('.content').terminal(commands, {
    prompt: prompt(),
    completion: completion,
    // detect iframe codepen preview
    enabled: $('body').attr('onload') === undefined,
});
// for codepen preview
if (!term.enabled()) {
    term.find('.cursor').addClass('blink');
}
function prompt(type) {
    return function(callback) {
        var prompt;
        if (type === 'windows') {
            prompt = 'C:\\' + path.join('\\') + '> ';
        } else {
            prompt = 'user@host:/' + path.join('/') + '$ ';
        }
        $('.title').html(prompt);
        callback(prompt);
    };
}
$('#type').on('change', function() {
    shell.removeClass('osx windows ubuntu default custom').addClass(this.value);
    term.toggleClass('underline-animation', this.value == 'windows');
    term.set_prompt(prompt(this.value));
});
$('#dark').on('change', function() {
    shell.removeClass('dark light');
    if (this.checked) {
        shell.addClass('dark');
    } else {
        shell.addClass('light');
    }
});
$('#type, #dark').on('change', function() {
    setTimeout(function() {
        term.focus();
    }, 400)
});
github && github('jcubic/jquery.terminal');