import * as pages from "tns-core-modules/ui/page";
import { EventData } from "tns-core-modules/data/observable";
import * as button from "tns-core-modules/ui/button";

import { GridLayout } from "tns-core-modules/ui/layouts/grid-layout";

let testIndex = 0;
const tests = [
    { name: "black hex color only", background: "#000000" },
    { name: "yellow hex color only", background: "#ffff00" },
    { name: "blue color only", background: "blue" },

    { name: "repeat image only", background: "url(\"~/ui-tests-app/resources/images/icon.png\")" },
    { name: "linear gradient red-blue only", background: "linear-gradient(to bottom, red, blue)"},

    { name: "[straight] image only, no-repeat ", background: "url(\"~/ui-tests-app/resources/images/icon.png\") no-repeat" },
    { name: "[straight] green color, image, no-repeat", background: "green url(\"~/ui-tests-app/resources/images/icon.png\") no-repeat" },
    { name: "[straight] yellow hex color, image, no-repeat, position pixels", background: "#ffff00 url(\"~/ui-tests-app/resources/images/icon.png\") no-repeat 200px 200px" },
    { name: "[straight] yellow hex color, image, repeat-y, position pixels", background: "#ffff00 url(\"~/ui-tests-app/resources/images/icon.png\") repeat-y 100px 500px" },
    { name: "[straight] orange hex color, image, no-repeat, position percents", background: "#F9791F url(\"~/ui-tests-app/resources/images/icon.png\") no-repeat 100% 100%" },
    { name: "[straight] green color, image, repeat-x, position percents", background: "green url(\"~/ui-tests-app/resources/images/icon.png\") repeat-x 100% 100%" },
    { name: "[straight] blue color, image, repeat-x, position", background: "blue url(\"~/ui-tests-app/resources/images/icon.png\") repeat-x 150 150" },

    { name: "[shuffle] no-repeat, image only", background: "no-repeat url(\"~/ui-tests-app/resources/images/icon.png\")" },
    { name: "[shuffle] no-repeat, green color, image, ", background: "no-repeat green url(\"~/ui-tests-app/resources/images/icon.png\")" },
    { name: "[shuffle] yellow hex color, position pixels, image, no-repeat", background: "#ffff00 200px 200px url(\"~/ui-tests-app/resources/images/icon.png\") no-repeat" },
    { name: "[shuffle] image, repeat-y, yellow hex color, position pixels", background: "url(\"~/ui-tests-app/resources/images/icon.png\") repeat-y #ffff00 100px 500px" },
    { name: "[shuffle] position percents, image, no-repeat, orange hex color", background: "100% 100% url(\"~/ui-tests-app/resources/images/icon.png\") no-repeat #F9791F" },
    { name: "[shuffle] position percents, image, repeat-x, green color", background: "100% 100% url(\"~/ui-tests-app/resources/images/icon.png\") repeat-x green" },
    { name: "[shuffle] image, repeat-x, position, blue color,", background: "url(\"~/ui-tests-app/resources/images/icon.png\") repeat-x 150 150 blue" },
]

export function onLoaded(args) {
    applyNextStyle(args);
}

export function onButtonTap(args) {
    applyNextStyle(args);
}

function applyNextStyle(args) {
    let page = <pages.Page>args.object.page;
    let btn = <button.Button>args.object;
    let gridElement = <GridLayout>page.getViewById("Container");

    btn.text = tests[testIndex].name;
    gridElement.background = tests[testIndex].background;

    testIndex = testIndex < tests.length - 1 ? ++testIndex : 0;
}