//
// Kernel tests
//
casper.notebook_test(function () {
    // test that the kernel is running
    this.then(function () {
        this.test.assert(this.kernel_running(), 'kernel is running');
    });

    // test list
    this.thenEvaluate(function () {
        IPython._kernels = null;
        IPython.notebook.kernel.list(function (data) {
            IPython._kernels = data;
        });
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython._kernels !== null;
        });
    });
    this.then(function () {
        var num_kernels = this.evaluate(function () {
            return IPython._kernels.length;
        });
        this.test.assertEquals(num_kernels, 1, 'one kernel running');
    });
    
    // test get_info
    var kernel_info = this.evaluate(function () {
        return {
            name: IPython.notebook.kernel.name,
            id: IPython.notebook.kernel.id
        };
    });
    this.thenEvaluate(function () {
        IPython._kernel_info = null;
        IPython.notebook.kernel.get_info(function (data) {
            IPython._kernel_info = data;
        });
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython._kernel_info !== null;
        });
    });
    this.then(function () {
        var new_kernel_info = this.evaluate(function () {
            return IPython._kernel_info;
        });
        this.test.assertEquals(kernel_info.name, new_kernel_info.name, 'kernel: name correct');
        this.test.assertEquals(kernel_info.id, new_kernel_info.id, 'kernel: id correct');
    });

    // test interrupt
    this.thenEvaluate(function () {
        IPython._interrupted = false;
        IPython.notebook.kernel.interrupt(function () {
            IPython._interrupted = true;
        });
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython._interrupted;
        });
    });
    this.then(function () {
        var interrupted = this.evaluate(function () {
            return IPython._interrupted;
        });
        this.test.assert(interrupted, 'kernel was interrupted');
    });

    // test restart
    this.thenEvaluate(function () {
        IPython.notebook.kernel.restart();
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython.notebook.kernel.is_fully_disconnected();
        });
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython.notebook.kernel.is_connected();
        });
    });
    this.then(function () {
        this.test.assert(this.kernel_running(), 'kernel restarted');
    });

    // test reconnect
    this.thenEvaluate(function () {
        IPython.notebook.kernel.stop_channels();
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython.notebook.kernel.is_fully_disconnected();
        });
    });
    this.thenEvaluate(function () {
        IPython.notebook.kernel.reconnect();
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython.notebook.kernel.is_connected();
        });
    });
    this.then(function () {
        this.test.assert(this.kernel_running(), 'kernel reconnected');
    });

    // test kernel_info_request
    this.evaluate(function () {
        IPython.notebook.kernel.kernel_info(
            function(msg){
                IPython._kernel_info_response = msg;
            });
    });
    this.waitFor(
        function () {
            return this.evaluate(function(){
                return IPython._kernel_info_response;
        });
    });
    this.then(function () {
        var kernel_info_response =  this.evaluate(function(){
            return IPython._kernel_info_response;
        });
        this.test.assertTrue( kernel_info_response.msg_type === 'kernel_info_reply', 'Kernel info request return kernel_info_reply');
        this.test.assertTrue( kernel_info_response.content !== undefined, 'Kernel_info_reply is not undefined');
    });

    // test kill
    this.thenEvaluate(function () {
        IPython.notebook.kernel.kill();
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython.notebook.kernel.is_fully_disconnected();
        });
    });
    this.then(function () {
        this.test.assert(!this.kernel_running(), 'kernel is not running');
    });

    // test start
    var url;
    this.then(function () {
        url = this.evaluate(function () {
            return IPython.notebook.kernel.start();
        });
    });
    this.then(function () {
        this.test.assertEquals(url, "/api/kernels", "start url is correct");
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython.notebook.kernel.is_connected();
        });
    });
    this.then(function () {
        this.test.assert(this.kernel_running(), 'kernel is running');
    });

    // test start with parameters
    this.thenEvaluate(function () {
        IPython.notebook.kernel.kill();
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython.notebook.kernel.is_fully_disconnected();
        });
    });
    this.then(function () {
        url = this.evaluate(function () {
            return IPython.notebook.kernel.start({foo: "bar"});
        });
    });
    this.then(function () {
        this.test.assertEquals(url, "/api/kernels?foo=bar", "start url with params is correct");
    });
    this.waitFor(function () {
        return this.evaluate(function () {
            return IPython.notebook.kernel.is_connected();
        });
    });
    this.then(function () {
        this.test.assert(this.kernel_running(), 'kernel is running');
    });
});