var vows = require('vows'),
    assert = require('assert'),
    log4js = require('../lib/log4js'),
    sandbox = require('sandboxed-module');

function setupLogging(category, options) {
    var msgs = [];

    var fakeMailer = {
	send_mail: function (msg, callback) {
	    msgs.push(msg);
	    callback(null, true);
	}
    };

    var smtpModule = sandbox.require('../lib/appenders/smtp', {
	requires: {
	    'nodemailer': fakeMailer
	}
    });

    log4js.addAppender(smtpModule.configure(options), category);

    return {
	logger: log4js.getLogger(category),
	mailer: fakeMailer,
	results: msgs
    };
}

function checkMessages (result, sender, subject) {
    for (var i = 0; i < result.results.length; ++i) {
	assert.equal(result.results[i].sender, sender ? sender : result.mailer.SMTP.user);
	assert.equal(result.results[i].to, 'recipient@domain.com');
	assert.equal(result.results[i].subject, subject ? subject : 'Log event #' + (i+1));
	assert.ok(new RegExp('.+Log event #' + (i+1) + '\n$').test(result.results[i].body));
    }
}

log4js.clearAppenders();
vows.describe('log4js smtpAppender').addBatch({
    'minimal config': {
	topic: function() {
	    var setup = setupLogging('minimal config', {
		recipients: 'recipient@domain.com',
		smtp: {
		    port: 25,
		    user: 'user@domain.com'
		}
	    });
	    setup.logger.info('Log event #1');
	    return setup;
	},
	'mailer should be configured properly': function (result) {
	    assert.ok(result.mailer.SMTP);
	    assert.equal(result.mailer.SMTP.port, 25);
	    assert.equal(result.mailer.SMTP.user, 'user@domain.com');
	},
	'there should be one message only': function (result) {
	    assert.equal(result.results.length, 1);
	},
	'message should contain proper data': function (result) {
	    checkMessages(result);
	}
    },
    'fancy config': {
	topic: function() {
	    var setup = setupLogging('fancy config', {
		recipients: 'recipient@domain.com',
		sender: 'sender@domain.com',
		subject: 'This is subject',
		smtp: {
		    port: 25,
		    user: 'user@domain.com'
		}
	    });
	    setup.logger.info('Log event #1');
	    return setup;
	},
	'mailer should be configured properly': function (result) {
	    assert.ok(result.mailer.SMTP);
	    assert.equal(result.mailer.SMTP.port, 25);
	    assert.equal(result.mailer.SMTP.user, 'user@domain.com');
	},
	'there should be one message only': function (result) {
	    assert.equal(result.results.length, 1);
	},
	'message should contain proper data': function (result) {
	    checkMessages(result, 'sender@domain.com', 'This is subject');
	}
    },
    'separate email for each event': {
	topic: function() {
	    var self = this;
	    var setup = setupLogging('separate email for each event', {
		recipients: 'recipient@domain.com',
		smtp: {
		    port: 25,
		    user: 'user@domain.com'
		}
	    });
	    setTimeout(function () {
		setup.logger.info('Log event #1');
	    }, 0);
	    setTimeout(function () {
		setup.logger.info('Log event #2');
	    }, 500);
	    setTimeout(function () {
		setup.logger.info('Log event #3');
	    }, 1050);
	    setTimeout(function () {
		self.callback(null, setup);
	    }, 2100);
	},
	'there should be three messages': function (result) {
	    assert.equal(result.results.length, 3);
	},
	'messages should contain proper data': function (result) {
	    checkMessages(result);
	}
    },
    'multiple events in one email': {
	topic: function() {
	    var self = this;
	    var setup = setupLogging('multiple events in one email', {
		recipients: 'recipient@domain.com',
		sendInterval: 1,
		smtp: {
		    port: 25,
		    user: 'user@domain.com'
		}
	    });
	    setTimeout(function () {
		setup.logger.info('Log event #1');
	    }, 0);
	    setTimeout(function () {
		setup.logger.info('Log event #2');
	    }, 500);
	    setTimeout(function () {
		setup.logger.info('Log event #3');
	    }, 1050);
	    setTimeout(function () {
		self.callback(null, setup);
	    }, 2100);
	},
	'there should be two messages': function (result) {
	    assert.equal(result.results.length, 2);
	},
	'messages should contain proper data': function (result) {
	    assert.equal(result.results[0].sender, result.mailer.SMTP.user);
	    assert.equal(result.results[0].to, 'recipient@domain.com');
	    assert.equal(result.results[0].subject, 'Log event #1');
	    assert.equal(result.results[0].body.match(new RegExp('.+Log event #[1-2]$', 'gm')).length, 2);

	    assert.equal(result.results[1].sender, result.mailer.SMTP.user);
	    assert.equal(result.results[1].to, 'recipient@domain.com');
	    assert.equal(result.results[1].subject, 'Log event #3');
	    assert.ok(new RegExp('.+Log event #3\n$').test(result.results[1].body));
	}
    }

}).export(module);