// >> xml-module-snippet
//var xmlModule = require("@nativescript/core/xml");
// << xml-module-snippet

import * as TKUnit from "../tk-unit";
import * as xmlModule from "@nativescript/core/xml";
import * as fs from "@nativescript/core/file-system";
import { Builder } from "@nativescript/core/ui/builder";
import { isIOS, device } from "@nativescript/core/platform";
import lazy from "@nativescript/core/utils/lazy";

const sdkVersion = lazy(() => parseInt(device.sdkVersion));

export var test_XmlParser_IsDefined = function () {
    TKUnit.assertNotEqual(xmlModule.XmlParser, undefined, "Class XmlParser should be defined!");
};

export var test_ParserEventType_IsDefined = function () {
    TKUnit.assertNotEqual(xmlModule.ParserEventType, undefined, "Class ParserEventType should be defined!");
};

export var test_XmlParser_ElementsWithoutAttributesDoNotReportThem = function () {
    var attributes;
    var xmlParser = new xmlModule.XmlParser(function (event: xmlModule.ParserEvent) {
        switch (event.eventType) {
            case xmlModule.ParserEventType.StartElement:
                attributes = event.attributes;
                break;
        }
    });
    xmlParser.parse("<element/>");
    TKUnit.assertEqual(attributes, undefined, "Expected result: undefined; Actual result: " + attributes + ";");
};

export var test_XmlParser_EntityReferencesAreDecoded = function () {
    var data;
    var xmlParser = new xmlModule.XmlParser(function (event: xmlModule.ParserEvent) {
        switch (event.eventType) {
            case xmlModule.ParserEventType.Text:
                data = event.data;
                break;
        }
    });
    xmlParser.parse("<element>&lt;&gt;&quot;&amp;&apos;</element>");
    TKUnit.assert(data === "<>\"&'", "Expected result: <>\"&'; Actual result: " + data + ";");
};

export var test_XmlParser_EntityReferencesInAttributeValuesAreDecoded = function () {
    var data;
    var xmlParser = new xmlModule.XmlParser(function (event: xmlModule.ParserEvent) {
        switch (event.eventType) {
            case xmlModule.ParserEventType.StartElement:
                data = event.attributes["text"];
                break;
        }
    });
    xmlParser.parse("<Label text=\"&lt;&gt;&quot;&amp;&apos;\"/>");
    TKUnit.assert(data === "<>\"&'", "Expected result: <>\"&'; Actual result: " + data + ";");
};

export var test_XmlParser_UnicodeEntitiesAreDecoded = function () {
    var data;
    var xmlParser = new xmlModule.XmlParser(function (event: xmlModule.ParserEvent) {
        switch (event.eventType) {
            case xmlModule.ParserEventType.Text:
                data = event.data;
                break;
        }
    });
    xmlParser.parse("<element>&#x1f923;&#x2713;</element>");
    TKUnit.assert(data === "\uD83E\uDD23\u2713", "Expected result: \uD83E\uDD23\u2713; Actual result: " + data + ";");
};

export var test_XmlParser_UnicodeEntitiesInAttributeValuesAreDecoded = function () {
    var data;
    var xmlParser = new xmlModule.XmlParser(function (event: xmlModule.ParserEvent) {
        switch (event.eventType) {
            case xmlModule.ParserEventType.StartElement:
                data = event.attributes["text"];
                break;
        }
    });
    xmlParser.parse("<Label text=\"&#x1f923;&#x2713;\"/>");
    TKUnit.assert(data === "\uD83E\uDD23\u2713", "Expected result: \uD83E\uDD23\u2713; Actual result: " + data + ";");
};

export var test_XmlParser_OnErrorIsCalledWhenAnErrorOccurs = function () {
    var e;
    var xmlParser = new xmlModule.XmlParser(
        function (event: xmlModule.ParserEvent) {
            //test_XmlParser_OnErrorIsCalledWhenAnErrorOccurs
        },
        function (error: Error) {
            e = error;
        });
    xmlParser.parse("<element></otherElement>");
    TKUnit.assert(e !== undefined, "Expected result: error; Actual result: " + e + ";");
};

export var test_XmlParser_IntegrationTest = function () {
    if (isIOS && sdkVersion() < 10) {
        return;
    }

    var actualResult = "";
    var xmlParser = new xmlModule.XmlParser(function (event: xmlModule.ParserEvent) {
        if (event.eventType === xmlModule.ParserEventType.Text && event.data.trim() === "") {
            // Ignore ignorable whitespace.
            return;
        }

        actualResult += event.toString();
    });

    var file = fs.File.fromPath(fs.path.join(__dirname, "xml.xml"));
    var xmlString = file.readTextSync();
    xmlString = xmlString.replace(/(\r\n|\n|\r)/gm, "\n");
    xmlParser.parse(xmlString);

    var expectedResult: string;
    file = fs.File.fromPath(fs.path.join(__dirname, "xml.expected"));
    expectedResult = file.readTextSync();

    var i;
    var maxLength = Math.max(actualResult.length, expectedResult.length);
    for (i = 0; i < maxLength; i++) {

        var actualChar;
        var actualCharCode;
        if (i <= actualResult.length) {
            actualChar = actualResult.charAt(i);
            actualCharCode = actualResult.charCodeAt(i);
        }
        else {
            actualChar = "undefined";
            actualCharCode = "undefined";
        }

        var expectedChar;
        var expectedCharCode;
        if (i <= expectedResult.length) {
            expectedChar = expectedResult.charAt(i);
            expectedCharCode = expectedResult.charCodeAt(i);
        }
        else {
            expectedChar = "undefined";
            expectedCharCode = "undefined";
        }

        TKUnit.assert(actualCharCode === expectedCharCode, "At index " + i + ": Actual character is " + actualChar + "[" + actualCharCode + "]; Expected character is: " + expectedChar + "[" + expectedCharCode + "]");
    }
};

export var test_XmlParser_DummyDocumentationTest = function () {

    // >> xml-parser-snippet
    var onEventCallback = function (event: xmlModule.ParserEvent) {
        switch (event.eventType) {

            case xmlModule.ParserEventType.StartElement:
                var message = event.eventType + " " + event.elementName;
                if (event.attributes) {
                    message += ", Attributes:";
                    for (var attributeName in event.attributes) {
                        if (event.attributes.hasOwnProperty(attributeName)) {
                            message += " " + attributeName + "=\"" + event.attributes[attributeName] + "\"";
                        }
                    }
                }
                //console.log(message);
                break;

            case xmlModule.ParserEventType.EndElement:
                //console.log(event.eventType + " " + event.elementName);
                break;

            case xmlModule.ParserEventType.Text:
                var significantText = event.data.trim();
                if (significantText !== "") {
                    //console.log(event.eventType + "=\"" + significantText + "\"");
                }
                break;
        }
    };

    var onErrorCallback = function (error: Error) {
        console.log("Error: " + error.message);
    };

    var xmlParser = new xmlModule.XmlParser(onEventCallback, onErrorCallback);
    xmlParser.parse("<Document><First attr1=\"attribute1\" attr2=\"attribute2\">I am first</First><Second>I am second</Second></Document>");
    //// Calling parse will produce the following console output:
    //// StartElement Document
    //// StartElement First, Attributes: attr1 = "attribute1" attr2 = "attribute2"
    //// Text = "I am first"
    //// EndElement First
    //// StartElement Second
    //// Text = "I am second"
    //// EndElement Second
    //// EndElement Document
    // << xml-parser-snippet
};

export var test_XmlParser_NamespacesTest = function () {
    if (isIOS && sdkVersion() < 10) {
        return;
    }

    var xmlParser = new xmlModule.XmlParser(function (event: xmlModule.ParserEvent) {
        if (event.eventType !== xmlModule.ParserEventType.StartElement) {
            return;
        }

        var expectedResult = event.attributes["expected-namespace"];
        var actualResult = event.namespace;
        TKUnit.assert(actualResult === expectedResult, "Actual: " + actualResult + "; Expected: " + expectedResult);

    }, undefined, true);

    var file = fs.File.fromPath(fs.path.join(__dirname, "xml-with-namespaces.xml"));
    var xmlString = file.readTextSync();
    xmlParser.parse(xmlString);
};

export function test_MultiParserTemplate() {
    const xml = global.loadModule("xml-parser-tests/itemTemplates.xml", true);

    const view: any = Builder.parse(xml);
    TKUnit.assertNotNull(view.items);
    TKUnit.assertEqual(view.items.length, 1);
}