import * as helper from "../../ui-helper";
import * as TKUnit from "../../tk-unit";
import { parse } from "tns-core-modules/ui/builder";
import * as view from "tns-core-modules/ui/core/view";
import * as platform from "tns-core-modules/platform";
import { WebView } from "tns-core-modules/ui/web-view";
import { UITest } from "../../ui-test";
import { left, top, right, bottom, equal } from "../layouts/layout-tests-helper";

export class WebViewSafeAreaTest extends UITest<WebView> {

    private executeSnippet<U extends { root: view.View }>(ui: U, setup: (ui: U) => void, test: (ui: U) => void, pageOptions?: helper.PageOptions): void {
        function waitUntilTestElementLayoutIsValid(view: view.View, timeoutSec?: number): void {
            TKUnit.waitUntilReady(() => {
                return view.isLayoutValid;
            }, timeoutSec || 1);
        }

        setup(ui);
        helper.buildUIAndRunTest(ui.root, () => {
            waitUntilTestElementLayoutIsValid(ui.root);
            test(ui);
        }, pageOptions);
    }

    private noop() {
        // no operation
    }

    private getViews(template: string) {
        let root = parse(template);

        return {
            root,
            list: root.getViewById("webview") as WebView
        };
    }

    private webview_in_full_screen(webView: WebView, pageOptions?: helper.PageOptions) {
        const l = left(webView);
        const t = top(webView);
        const r = right(webView);
        const b = bottom(webView);
        equal(l, 0, `${webView}.left - actual:${l}; expected: ${0}`);
        equal(t, 0, `${webView}.top - actual:${t}; expected: ${0}`);
        equal(r, platform.screen.mainScreen.widthPixels, `${webView}.right - actual:${r}; expected: ${platform.screen.mainScreen.widthPixels}`);
        equal(b, platform.screen.mainScreen.heightPixels, `${webView}.bottom - actual:${b}; expected: ${platform.screen.mainScreen.heightPixels}`);
    }

    private webview_in_full_screen_test(pageOptions?: helper.PageOptions) {
        const snippet = `
        <WebView id="webview" loaded="onLoaded" backgroundColor="Crimson"></WebView>
        `;
        this.executeSnippet(
            this.getViews(snippet),
            this.noop,
            ({ list }) => {
                this.webview_in_full_screen(list, pageOptions);
            },
            pageOptions
        );
    }

    public test_webview_in_full_screen_action_bar() {
        this.webview_in_full_screen_test({ actionBar: true });
    }

    public test_webview_in_full_screen_action_bar_hidden() {
        this.webview_in_full_screen_test({ actionBarHidden: true });
    }

    public test_webview_in_full_screen_action_bar_flat() {
        this.webview_in_full_screen_test({ actionBarFlat: true });
    }

    public test_webview_in_full_screen_tab_bar() {
        this.webview_in_full_screen_test({ tabBar: true });
    }
}

export function createTestCase(): WebViewSafeAreaTest {
    return new WebViewSafeAreaTest();
}