var fs = require('fs');
var _ = require('third/underscore/underscore.js');
var Handlebars = require('handlebars');

// Run all the JS scripts in our test directory.  Tests do NOT run
// in isolation.

var tests = fs.readdirSync(__dirname)
    .filter(function (filename) { return (/\.js$/i).test(filename); })
    .map(function (filename) { return filename.replace(/\.js$/i, ''); });


tests.sort();

var dependencies = [];

global.set_global = function (name, val) {
    global[name] = val;
    dependencies.push(name);
    return val;
};

global.add_dependencies = function (dct) {
    _.each(dct, function (fn, name) {
        var obj = require(fn);
        set_global(name, obj);
    });
};

function template_dir() {
    return __dirname + '/../../../../static/templates/';
}

global.make_sure_all_templates_have_been_compiled = function () {
    var dir = template_dir();
    var fns = fs.readdirSync(dir).filter(function (fn) {
        return (/\.handlebars/).test(fn);
    });

    _.each(fns, function (fn) {
        var name = fn.split('.')[0];
        if (!Handlebars.templates[name]) {
            throw "The file " + fn + " has no test coverage.";
        }
    });
};

global.use_template = function (name) {
    if (Handlebars.templates === undefined) {
        Handlebars.templates = {};
    }
    var data = fs.readFileSync(template_dir() + name + '.handlebars').toString();
    Handlebars.templates[name] = Handlebars.compile(data);
};

var output_fn = '.test-js-with-node.html';

(function () {
    var data = '';

    data += '<link href="./static/styles/zulip.css" rel="stylesheet">\n';
    data += '<link href="./static/styles/thirdparty-fonts.css" rel="stylesheet">\n';
    data += '<link href="./static/third/bootstrap/css/bootstrap.css" rel="stylesheet">\n';
    data += '<style type="text/css">.collapse {height: inherit}</style>\n';
    data += '<style type="text/css">body {width: 500px; margin: auto}</style>\n';
    data += '<meta http-equiv="Content-Type" content="text/html; charset=utf-8">';
    data += '<h1>Output of node unit tests</h1>\n';
    fs.writeFileSync(output_fn, data);
}());

global.write_test_output = function (label, output) {
    var data = '';

    data += '<hr>';
    data += '<h3>' + label + '</h3>';
    data += output;
    data += '\n';
    fs.appendFileSync(output_fn, data);
};

global.append_test_output = function (output) {
    fs.appendFileSync(output_fn, output);
};

tests.forEach(function (filename) {
    if (filename === 'index') {
        return;
    }
    console.info('running tests for ' + filename);
    require('./' + filename);

    dependencies.forEach(function (name) {
        delete global[name];
    });
    dependencies = [];
});

console.info("To see more output, open " + output_fn);