/*globals casper */

/**
 * Casper Tests
 *
 * Functional browser tests for checking that the Ghost Admin UI is working as expected
 * The setup of these tests is a little hacky for now, which is why they are not wired in to grunt
 * Requires that you are running Ghost locally and have already registered a single user
 *
 * Usage (from test/functional):
 *
 * casperjs test admin/ --includes=base.js [--host=localhost --port=2368 --noPort=false --email=ghost@tryghost.org --password=Sl1m3r]
 *
 * --host - your local host address e.g. localhost or local.tryghost.org
 * --port - port number of your local Ghost
 * --email - the email address your admin user is registered with
 * --password - the password your admin user is registered with
 * --noPort - don't include a port number
 *
 * Requirements:
 * you must have phantomjs 1.9.1 and casperjs 1.1.0-DEV installed in order for these tests to work
 */
/*jshint unused:false */
var DEBUG = false, // TOGGLE THIS TO GET MORE SCREENSHOTS
    host = casper.cli.options.host || 'localhost',
    noPort = casper.cli.options.noPort || false,
    port = casper.cli.options.port || '2368',
    email = casper.cli.options.email || 'jbloggs@example.com',
    password = casper.cli.options.password || 'Sl1m3rson',
    url = 'http://' + host + (noPort ? '/' : ':' + port + '/'),
    newUser = {
        name: 'Test User',
        slug: 'test',
        email: email,
        password: password
    },
    newSetup = {
        'blog-title': 'Test Blog',
        name: 'Test User',
        email: email,
        password: password
    },
    user = {
        identification: email,
        password: password
    },
    falseUser = {
        identification: email,
        password: 'letmethrough'
    },
    testPost = {
        title: 'Bacon ipsum dolor sit amet',
        html: 'I am a test post.\n#I have some small content'
    },
    screens,
    CasperTest,
    utils = require('utils'),
    // ## Debugging
    jsErrors = [],
    pageErrors = [],
    resourceErrors = [];

screens = {
    root: {
        url: 'ghost/',
        linkSelector: '.gh-nav-main-content',
        selector: '.gh-nav-main-content.active'
    },
    content: {
        url: 'ghost/',
        linkSelector: '.gh-nav-main-content',
        selector: '.gh-nav-main-content.active'
    },
    editor: {
        url: 'ghost/editor/',
        linkSelector: '.gh-nav-main-editor',
        selector: '.gh-nav-main-editor.active'
    },
    about: {
        url: 'ghost/about',
        linkSelector: '.gh-nav-menu-about',
        selector: '.gh-about-header'
    },
    'editor.editing': {
        url: 'ghost/editor/',
        linkSelector: 'a.post-edit',
        selector: '.entry-markdown-content .markdown-editor'
    },
    'settings.general': {
        url: 'ghost/settings/general',
        selector: '.gh-nav-settings-general.active'
    },
    'settings.tags': {
        url: 'ghost/settings/tags',
        selector: '.gh-nav-settings-tags.active'
    },
    team: {
        url: 'ghost/team',
        linkSelector: '.gh-nav-main-users',
        selector: '.gh-nav-main-users.active'
    },
    'team.user': {
        url: 'ghost/team/test',
        linkSelector: '.user-menu-profile',
        selector: '.user-profile'
    },
    signin: {
        url: 'ghost/signin/',
        selector: '.btn-blue'
    },
    'signin-authenticated': {
        url: 'ghost/signin/',
        // signin with authenticated user redirects to posts
        selector: '.gh-nav-main-content.active'
    },

    signout: {
        url: 'ghost/signout/',
        linkSelector: '.user-menu-signout',
        // When no user exists we get redirected to setup which has btn-green
        selector: '.btn-blue, .btn-green'
    },
    signup: {
        url: 'ghost/signup/',
        selector: '.btn-blue'
    },
    setup: {
        url: 'ghost/setup/one/',
        selector: '.btn-green'
    },
    'setup.two': {
        url: 'ghost/setup/two/',
        linkSelector: '.btn-green',
        selector: '.gh-flow-create'
    },
    'setup.three': {
        url: 'ghost/setup/three/',
        selector: '.gh-flow-invite'
    },
    'setup-authenticated': {
        url: 'ghost/setup/',
        selector: '.gh-nav-main-content.active'
    }
};

casper.writeContentToEditor = function (content) {
    // If we are on a new editor, the autosave is going to get triggered when we try to type, so we need to trigger
    // that and wait for it to sort itself out
    if (/ghost\/editor\/$/.test(casper.getCurrentUrl())) {
        casper.waitForSelector('.entry-markdown-content textarea', function onSuccess() {
            casper.click('.entry-markdown-content textarea');
        }, function onTimeout() {
            casper.test.fail('Editor was not found on initial load.');
        }, 2000);

        casper.waitForUrl(/\/ghost\/editor\/\d+\/$/, function onSuccess() {
            // do nothing
        }, function onTimeout() {
            casper.test.fail('The url didn\'t change: ' + casper.getCurrentUrl());
        }, 2000);
    }

    casper.waitForSelector('.entry-markdown-content textarea', function onSuccess() {
        casper.sendKeys('.entry-markdown-content textarea', content, {keepFocus: true});
        // Always end with a new line
        casper.sendKeys('.entry-markdown-content textarea', '\n', {keepFocus: true});
        casper.captureScreenshot('EditorText.png');

        return this;
    }, function onTimeout() {
        casper.test.fail('Editor was not found on main load.');
    }, 2000);
};

casper.waitForOpacity = function (classname, opacity, then, timeout) {
    timeout = timeout || casper.failOnTimeout(casper.test, 'waitForOpacity failed on ' + classname + ' ' + opacity);
    casper.waitForSelector(classname).then(function () {
        casper.waitFor(function checkOpaque() {
            var value = this.evaluate(function (element, opacity) {
                var target = document.querySelector(element);
                if (target === null) {
                    return null;
                }
                return window.getComputedStyle(target).getPropertyValue('opacity') === opacity;
            }, classname, opacity);
            if (value !== true && value !== false) {
                casper.test.fail('Unable to find element: ' + classname);
            }
            return value;
        }, then, timeout);
    });
};

casper.waitForOpaque = function (classname, then, timeout) {
    casper.waitForOpacity(classname, '1', then, timeout);
};

casper.waitForTransparent = function (classname, then, timeout) {
    casper.waitForOpacity(classname, '0', then, timeout);
};

// ### Then Open And Wait For Page Load
// Always wait for the `.page-content` element as some indication that the ember app has loaded.
casper.thenOpenAndWaitForPageLoad = function (screen, then, timeout) {
    then = then || function () {};
    timeout = timeout || casper.failOnTimeout(casper.test, 'Unable to load ' + screen);

    return casper.thenOpen(url + screens[screen].url).then(function () {
        // HACK: phantomjs + flexbox = nope. Fix offending styles here.
        casper.evaluate(function () {
            var style = document.createElement('style');
            style.innerHTML = '.gh-main > section { width: auto; }';
            document.body.appendChild(style);
        });
        return casper.waitForScreenLoad(screen, then, timeout);
    });
};

casper.waitForScreenLoad = function (screen, then, timeout) {
    // Some screens fade in
    return casper.waitForOpaque(screens[screen].selector, then, timeout, 10000);
};

casper.thenTransitionAndWaitForScreenLoad = function (screen, then, timeout) {
    then = then || function () {};
    timeout = timeout || casper.failOnTimeout(casper.test, 'Unable to load ' + screen);

    return casper.thenClick(screens[screen].linkSelector).then(function () {
        return casper.waitForScreenLoad(screen, then, timeout);
    });
};

casper.failOnTimeout = function (test, message) {
    return function onTimeout() {
        test.fail(message);
    };
};

// ### Fill And Save
// With Ember in place, we don't want to submit forms, rather press the button which always has a class of
// 'btn-blue'. This method handles that smoothly.
casper.fillAndSave = function (selector, data) {
    casper.then(function doFill() {
        casper.fill(selector, data, false);
        casper.thenClick('.btn-blue');
    });
};

// ### Fill And Add
// With Ember in place, we don't want to submit forms, rather press the green button which always has a class of
// 'btn-green'. This method handles that smoothly.
casper.fillAndAdd = function (selector, data) {
    casper.then(function doFill() {
        casper.fill(selector, data, false);
        casper.thenClick('.btn-green');
    });
};

// ## Echo Concise
// Does casper.echo but checks for the presence of the --concise flag
casper.echoConcise = function (message, style) {
    if (!casper.cli.options.concise) {
        casper.echo(message, style);
    }
};

// ### Wait for Selector Text
// Does casper.waitForSelector but checks for the presence of specified text
// http://stackoverflow.com/questions/32104784/wait-for-an-element-to-have-a-specific-text-with-casperjs
casper.waitForSelectorText = function (selector, text, then, onTimeout, timeout) {
    this.waitForSelector(selector, function _then() {
        this.waitFor(function _check() {
            var content = this.fetchText(selector);
            if (utils.isRegExp(text)) {
                return text.test(content);
            }
            return content.indexOf(text) !== -1;
        }, then, onTimeout, timeout);
    }, onTimeout, timeout);
    return this;
};

// pass through all console.logs
casper.on('remote.message', function (msg) {
    casper.echoConcise('CONSOLE LOG: ' + msg, 'INFO');
});

// output any errors
casper.on('error', function (msg, trace) {
    casper.echoConcise('ERROR, ' + msg, 'ERROR');
    if (trace && trace[0]) {
        casper.echoConcise('file:     ' + trace[0].file, 'WARNING');
        casper.echoConcise('line:     ' + trace[0].line, 'WARNING');
        casper.echoConcise('function: ' + trace[0].function, 'WARNING');
    }
    jsErrors.push(msg);
});

// output any page errors
casper.on('page.error', function (msg, trace) {
    casper.echoConcise('PAGE ERROR: ' + msg, 'ERROR');
    if (trace && trace[0]) {
        casper.echoConcise('file:     ' + trace[0].file, 'WARNING');
        casper.echoConcise('line:     ' + trace[0].line, 'WARNING');
        casper.echoConcise('function: ' + trace[0].function, 'WARNING');
    }
    pageErrors.push(msg);
});

casper.on('resource.received', function (resource) {
    var status = resource.status;
    if (status >= 400) {
        casper.echoConcise('RESOURCE ERROR: ' + resource.url + ' failed to load (' + status + ')', 'ERROR');

        resourceErrors.push({
            url: resource.url,
            status: resource.status
        });
    }
});

casper.captureScreenshot = function (filename, debugOnly) {
    debugOnly = debugOnly !== false;
    // If we are in debug mode, OR debugOnly is false
    if (DEBUG || debugOnly === false) {
        filename = filename || 'casper_test_fail.png';
        casper.then(function () {
            casper.capture(new Date().getTime() + '_' + filename);
        });
    }
};

// on failure, grab a screenshot
casper.test.on('fail', function captureFailure() {
    casper.captureScreenshot(casper.test.filename || 'casper_test_fail.png', false);
    casper.then(function () {
        console.log(casper.getHTML());
        casper.exit(1);
    });
});

// on exit, output any errors
casper.test.on('exit', function () {
    if (jsErrors.length > 0) {
        casper.echo(jsErrors.length + ' Javascript errors found', 'WARNING');
    } else {
        casper.echo(jsErrors.length + ' Javascript errors found', 'INFO');
    }
    if (pageErrors.length > 0) {
        casper.echo(pageErrors.length + ' Page errors found', 'WARNING');
    } else {
        casper.echo(pageErrors.length + ' Page errors found', 'INFO');
    }

    if (resourceErrors.length > 0) {
        casper.echo(resourceErrors.length + ' Resource errors found', 'WARNING');
    } else {
        casper.echo(resourceErrors.length + ' Resource errors found', 'INFO');
    }
});

CasperTest = (function () {
    var _beforeDoneHandler,
        _noop = function noop() { },
        _isUserRegistered = false;

    // Always log out at end of test.
    casper.test.tearDown(function (done) {
        casper.then(_beforeDoneHandler);

        CasperTest.Routines.signout.run();

        casper.run(done);
    });

    // Wrapper around `casper.test.begin`
    function begin(testName, expect, suite, doNotAutoLogin, doNotRunSetup) {
        _beforeDoneHandler = _noop;

        var runTest = function (test) {
            test.filename = testName.toLowerCase().replace(/ /g, '-').concat('.png');

            casper.start('about:blank').viewport(1280, 1024);
            // Only call register once for the lifetime of CasperTest
            if (!_isUserRegistered && !doNotRunSetup) {
                CasperTest.Routines.signout.run();
                CasperTest.Routines.setup.run();
                CasperTest.Routines.signout.run();

                _isUserRegistered = true;
            }

            if (!doNotAutoLogin) {
                /* Ensure we're logged out at the start of every test or we may get
                 unexpected failures. */
                CasperTest.Routines.signout.run();
                CasperTest.Routines.signin.run();
            }

            suite.call(casper, test);

            casper.run(function () {
                test.done();
            });
        };

        if (typeof expect === 'function') {
            doNotAutoLogin = suite;
            suite = expect;

            casper.test.begin(testName, runTest);
        } else {
            casper.test.begin(testName, expect, runTest);
        }
    }

    // Sets a handler to be invoked right before `test.done` is invoked
    function beforeDone(fn) {
        if (fn) {
            _beforeDoneHandler = fn;
        } else {
            _beforeDoneHandler = _noop;
        }
    }

    return {
        begin: begin,
        beforeDone: beforeDone
    };
}());

CasperTest.Routines = (function () {
    function setup() {
        casper.thenOpenAndWaitForPageLoad('setup.two', function then() {
            casper.captureScreenshot('setting_up1.png');

            casper.fillAndAdd('#setup', newSetup);

            casper.captureScreenshot('setting_up2.png');

            casper.waitForSelectorTextChange('.gh-alert-success', function onSuccess() {
                var errorText = casper.evaluate(function () {
                    return document.querySelector('.gh-alert').innerText;
                });
                casper.echoConcise('Setup failed. Error text: ' + errorText);
            }, function onTimeout() {
                casper.echoConcise('Setup completed.');
            }, 2000);

            casper.captureScreenshot('setting_up3.png');
        });
    }

    function signin() {
        casper.thenOpenAndWaitForPageLoad('signin', function then() {
            casper.waitForOpaque('.gh-signin', function then() {
                casper.captureScreenshot('signing_in.png');
                this.fillAndSave('#login', user);
                casper.captureScreenshot('signing_in2.png');
            });

            casper.waitForResource(/posts\/\?(?=.*status=all)(?=.*staticPages=all)/, function then() {
                casper.captureScreenshot('signing_in.png');
            }, function timeout() {
                casper.test.fail('Unable to signin and load admin panel');
            });
        });
    }

    function signout() {
        casper.thenOpenAndWaitForPageLoad('signout', function then() {
            casper.captureScreenshot('ember_signing_out.png');
        });
    }

    // This will need switching over to ember once settings general is working properly.
    function togglePermalinks(state) {
        casper.thenOpenAndWaitForPageLoad('settings.general', function then() {
            var currentState = this.evaluate(function () {
                return document.querySelector('#permalinks') && document.querySelector('#permalinks').checked ? 'on' : 'off';
            });
            if (currentState !== state) {
                casper.thenClick('#permalinks');
                casper.thenClick('.btn-blue');

                casper.captureScreenshot('saving.png');

                casper.waitForSelector('.notification-success', function () {
                    casper.captureScreenshot('saved.png');
                });
            }
        });
    }

    function createTestPost(publish) {
        casper.thenOpenAndWaitForPageLoad('editor', function createTestPost() {
            casper.sendKeys('#entry-title', testPost.title);
            casper.writeContentToEditor(testPost.html);
        });

        casper.waitForSelectorTextChange('.entry-preview .rendered-markdown');

        if (publish) {
            // Open the publish options menu;
            casper.thenClick('.js-publish-splitbutton .dropdown-toggle');

            casper.waitForOpaque('.js-publish-splitbutton .open');

            // Select the publish post button
            casper.thenClick('.post-save-publish a');

            casper.waitForSelectorTextChange('.js-publish-button', function onSuccess() {
                casper.thenClick('.js-publish-button');
            });
        } else {
            casper.thenClick('.js-publish-button');
        }

        casper.waitForResource(/posts\/\?include=tags$/);
    }

    function _createRunner(fn) {
        fn.run = function run(test) {
            var self = this;

            casper.then(function () {
                self.call(casper, test);
            });
        };

        return fn;
    }

    return {
        setup: _createRunner(setup),
        signin: _createRunner(signin),
        signout: _createRunner(signout),
        createTestPost: _createRunner(createTestPost),
        togglePermalinks: _createRunner(togglePermalinks)
    };
}());