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

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

    var fakeMailer = {
        createTransport: function (name, options) {
            return {
                config: options,
                sendMail: function (msg, callback) {
                    msgs.push(msg);
                    callback(null, true);
                },
                close: function () {
                }
            };
        }
    };

    var fakeLayouts = {
        layout: function (type, config) {
            this.type = type;
            this.config = config;
            return log4js.layouts.messagePassThroughLayout;
        },
        basicLayout: log4js.layouts.basicLayout,
        messagePassThroughLayout: log4js.layouts.messagePassThroughLayout
    };

    var fakeConsole = {
        errors: [],
        error: function (msg, value) {
            this.errors.push({msg: msg, value: value});
        }
    };

    var fakeTransportPlugin = function () {
    };

    var smtpModule = sandbox.require('../lib/appenders/smtp', {
        requires: {
            'nodemailer': fakeMailer,
            'nodemailer-sendmail-transport': fakeTransportPlugin,
            'nodemailer-smtp-transport': fakeTransportPlugin,
            '../layouts': fakeLayouts
        },
        globals: {
            console: fakeConsole
        }
    });

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

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

function checkMessages(result, sender, subject) {
    for (var i = 0; i < result.results.length; ++i) {
        assert.equal(result.results[i].from, sender);
        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].text));
    }
}

log4js.clearAppenders();
vows.describe('log4js smtpAppender').addBatch({
    'minimal config': {
        topic: function () {
            var setup = setupLogging('minimal config', {
                recipients: 'recipient@domain.com',
                SMTP: {
                    port: 25,
                    auth: {
                        user: 'user@domain.com'
                    }
                }
            });
            setup.logger.info('Log event #1');
            return setup;
        },
        '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,
                    auth: {
                        user: 'user@domain.com'
                    }
                }
            });
            setup.logger.info('Log event #1');
            return setup;
        },
        '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');
        }
    },
    'config with layout': {
        topic: function () {
            var setup = setupLogging('config with layout', {
                layout: {
                    type: "tester"
                }
            });
            return setup;
        },
        'should configure layout': function (result) {
            assert.equal(result.layouts.type, 'tester');
        }
    },
    '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,
                    auth: {
                        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');
            }, 1100);
            setTimeout(function () {
                self.callback(null, setup);
            }, 3000);
        },
        '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,
                    auth: {
                        user: 'user@domain.com'
                    }
                }
            });
            setTimeout(function () {
                setup.logger.info('Log event #1');
            }, 0);
            setTimeout(function () {
                setup.logger.info('Log event #2');
            }, 100);
            setTimeout(function () {
                setup.logger.info('Log event #3');
            }, 1500);
            setTimeout(function () {
                self.callback(null, setup);
            }, 3000);
        },
        '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].to, 'recipient@domain.com');
            assert.equal(result.results[0].subject, 'Log event #1');
            assert.equal(result.results[0].text.match(new RegExp('.+Log event #[1-2]$', 'gm')).length, 2);
            assert.equal(result.results[1].to, 'recipient@domain.com');
            assert.equal(result.results[1].subject, 'Log event #3');
            assert.ok(new RegExp('.+Log event #3\n$').test(result.results[1].text));
        }
    },
    'error when sending email': {
        topic: function () {
            var setup = setupLogging('error when sending email', {
                recipients: 'recipient@domain.com',
                sendInterval: 0,
                SMTP: {port: 25, auth: {user: 'user@domain.com'}}
            });

            setup.mailer.createTransport = function () {
                return {
                    sendMail: function (msg, cb) {
                        cb({message: "oh noes"});
                    },
                    close: function () {
                    }
                };
            };

            setup.logger.info("This will break");
            return setup.console;
        },
        'should be logged to console': function (cons) {
            assert.equal(cons.errors.length, 1);
            assert.equal(cons.errors[0].msg, "log4js.smtpAppender - Error happened");
            assert.equal(cons.errors[0].value.message, 'oh noes');
        }
    },
    'transport full config': {
        topic: function () {
            var setup = setupLogging('transport full config', {
                recipients: 'recipient@domain.com',
                transport: {
                    plugin: 'sendmail',
                    options: {
                        path: '/usr/sbin/sendmail'
                    }
                }
            });
            setup.logger.info('Log event #1');
            return setup;
        },
        'there should be one message only': function (result) {
            assert.equal(result.results.length, 1);
        },
        'message should contain proper data': function (result) {
            checkMessages(result);
        }
    },
    'transport no-options config': {
        topic: function () {
            var setup = setupLogging('transport no-options config', {
                recipients: 'recipient@domain.com',
                transport: {
                    plugin: 'sendmail'
                }
            });
            setup.logger.info('Log event #1');
            return setup;
        },
        'there should be one message only': function (result) {
            assert.equal(result.results.length, 1);
        },
        'message should contain proper data': function (result) {
            checkMessages(result);
        }
    },
    'transport no-plugin config': {
        topic: function () {
            var setup = setupLogging('transport no-plugin config', {
                recipients: 'recipient@domain.com',
                transport: {
                }
            });
            setup.logger.info('Log event #1');
            return setup;
        },
        'there should be one message only': function (result) {
            assert.equal(result.results.length, 1);
        },
        'message should contain proper data': function (result) {
            checkMessages(result);
        }
    }
}).export(module);
