/* Add js reporter for sauce */

jasmine.getEnv().addReporter(new jasmine.JSReporter2());

/* record log messages for testing */

var logMessages = [];
window.less = window.less || {};

var logLevel_debug = 4,
    logLevel_info = 3,
    logLevel_warn = 2,
    logLevel_error = 1;

// The amount of logging in the javascript console.
// 3 - Debug, information and errors
// 2 - Information and errors
// 1 - Errors
// 0 - None
// Defaults to 2

less.loggers = [
    {
        debug: function(msg) {
            if (less.options.logLevel >= logLevel_debug) {
                logMessages.push(msg);
            }
        },
        info: function(msg) {
            if (less.options.logLevel >= logLevel_info) {
                logMessages.push(msg);
            }
        },
        warn: function(msg) {
            if (less.options.logLevel >= logLevel_warn) {
                logMessages.push(msg);
            }
        },
        error: function(msg) {
            if (less.options.logLevel >= logLevel_error) {
                logMessages.push(msg);
            }
        }
    }
];

var testLessEqualsInDocument = function () {
    testLessInDocument(testSheet);
};

var testLessErrorsInDocument = function (isConsole) {
    testLessInDocument(isConsole ? testErrorSheetConsole : testErrorSheet);
};

var testLessInDocument = function (testFunc) {
    var links = document.getElementsByTagName('link'),
        typePattern = /^text\/(x-)?less$/;

    for (var i = 0; i < links.length; i++) {
        if (links[i].rel === 'stylesheet/less' || (links[i].rel.match(/stylesheet/) &&
            (links[i].type.match(typePattern)))) {
            testFunc(links[i]);
        }
    }
};

var ieFormat = function(text) {
    var styleNode = document.createElement('style');
    styleNode.setAttribute('type', 'text/css');
    var headNode = document.getElementsByTagName('head')[0];
    headNode.appendChild(styleNode);
    try {
        if (styleNode.styleSheet) {
            styleNode.styleSheet.cssText = text;
        } else {
            styleNode.innerText = text;
        }
    } catch (e) {
        throw new Error("Couldn't reassign styleSheet.cssText.");
    }
    var transformedText = styleNode.styleSheet ? styleNode.styleSheet.cssText : styleNode.innerText;
    headNode.removeChild(styleNode);
    return transformedText;
};

var testSheet = function (sheet) {
    it(sheet.id + " should match the expected output", function (done) {
        var lessOutputId = sheet.id.replace("original-", ""),
            expectedOutputId = "expected-" + lessOutputId,
            lessOutputObj,
            lessOutput,
            expectedOutputHref = document.getElementById(expectedOutputId).href,
            expectedOutput = loadFile(expectedOutputHref);

        // Browser spec generates less on the fly, so we need to loose control
        less.pageLoadFinished
            .then(function () {
                lessOutputObj = document.getElementById(lessOutputId);
                lessOutput = lessOutputObj.styleSheet ? lessOutputObj.styleSheet.cssText :
                    (lessOutputObj.innerText || lessOutputObj.innerHTML);

                expectedOutput
                    .then(function (text) {
                        if (window.navigator.userAgent.indexOf("MSIE") >= 0 ||
                            window.navigator.userAgent.indexOf("Trident/") >= 0) {
                            text = ieFormat(text);
                        }
                        expect(lessOutput).toEqual(text);
                        done();
                    });
            });
    });
};

//TODO: do it cleaner - the same way as in css

function extractId(href) {
    return href.replace(/^[a-z-]+:\/+?[^\/]+/i, '') // Remove protocol & domain
        .replace(/^\//, '') // Remove root /
        .replace(/\.[a-zA-Z]+$/, '') // Remove simple extension
        .replace(/[^\.\w-]+/g, '-') // Replace illegal characters
        .replace(/\./g, ':'); // Replace dots with colons(for valid id)
}

var waitFor = function (waitFunc) {
    return new Promise(function (resolve) {
        var timeoutId = setInterval(function () {
            if (waitFunc()) {
                clearInterval(timeoutId);
                resolve();
            }
        }, 5);
    });
};

var testErrorSheet = function (sheet) {
    it(sheet.id + " should match an error", function (done) {
        var lessHref = sheet.href,
            id = "less-error-message:" + extractId(lessHref),
            errorHref = lessHref.replace(/.less$/, ".txt"),
            errorFile = loadFile(errorHref),
            actualErrorElement,
            actualErrorMsg;

        // Less.js sets 10ms timer in order to add error message on top of page.
        waitFor(function () {
            actualErrorElement = document.getElementById(id);
            return actualErrorElement !== null;
        }).then(function () {
                var innerText = (actualErrorElement.innerHTML
                        .replace(/<h3>|<\/?p>|<a href="[^"]*">|<\/a>|<ul>|<\/?pre( class="?[^">]*"?)?>|<\/li>|<\/?label>/ig, "")
                        .replace(/<\/h3>/ig, " ")
                        .replace(/<li>|<\/ul>|<br>/ig, "\n"))
                        .replace(/&amp;/ig, "&")
                        // for IE8
                        .replace(/\r\n/g, "\n")
                        .replace(/\. \nin/, ". in");
                actualErrorMsg = innerText
                    .replace(/\n\d+/g, function (lineNo) {
                        return lineNo + " ";
                    })
                    .replace(/\n\s*in /g, " in ")
                    .replace(/\n{2,}/g, "\n")
                    .replace(/\nStack Trace\n[\s\S]*/i, "")
                    .replace(/\n$/, "");
                errorFile
                    .then(function (errorTxt) {
                        errorTxt = errorTxt
                            .replace(/\{path\}/g, "")
                            .replace(/\{pathrel\}/g, "")
                            .replace(/\{pathhref\}/g, "http://localhost:8081/test/less/errors/")
                            .replace(/\{404status\}/g, " (404)")
                            .replace(/\{node\}.*\{\/node\}/g, "")
                            .replace(/\n$/, "");
                        expect(actualErrorMsg).toEqual(errorTxt);
                        if (errorTxt == actualErrorMsg) {
                            actualErrorElement.style.display = "none";
                        }
                        done();
                    });
            });
    });
};

var testErrorSheetConsole = function (sheet) {
    it(sheet.id + " should match an error", function (done) {
        var lessHref = sheet.href,
            id = sheet.id.replace(/^original-less:/, "less-error-message:"),
            errorHref = lessHref.replace(/.less$/, ".txt"),
            errorFile = loadFile(errorHref),
            actualErrorElement = document.getElementById(id),
            actualErrorMsg = logMessages[logMessages.length - 1]
                .replace(/\nStack Trace\n[\s\S]*/, "");

        describe("the error", function () {
            expect(actualErrorElement).toBe(null);
        });

        errorFile
            .then(function (errorTxt) {
                errorTxt
                    .replace(/\{path\}/g, "")
                    .replace(/\{pathrel\}/g, "")
                    .replace(/\{pathhref\}/g, "http://localhost:8081/browser/less/")
                    .replace(/\{404status\}/g, " (404)")
                    .replace(/\{node\}.*\{\/node\}/g, "")
                    .trim();
                expect(actualErrorMsg).toEqual(errorTxt);
                done();
            });
    });
};

var loadFile = function (href) {
    return new Promise(function (resolve, reject) {
        var request = new XMLHttpRequest();
        request.open('GET', href, true);
        request.onreadystatechange = function () {
            if (request.readyState == 4) {
                resolve(request.responseText.replace(/\r/g, ""));
            }
        };
        request.send(null);
    });
};

jasmine.DEFAULT_TIMEOUT_INTERVAL = 90000;
