import { Page } from "tns-core-modules/ui/page";
import { GridLayout, ItemSpec } from "tns-core-modules/ui/layouts/grid-layout";
import { Button } from "tns-core-modules/ui/button";
import * as TKUnit from "../../TKUnit";
import * as view from "tns-core-modules/ui/core/view";
import { unsetValue } from "tns-core-modules/ui/core/view";
import * as builder from "tns-core-modules/ui/builder";
import * as testModule from "../../ui-test";
import * as layoutHelper from "./layout-helper";
import * as platform from "tns-core-modules/platform";
import { ios as iosUtils } from "tns-core-modules/utils/utils";
import * as commonTests from "./common-layout-tests";
import * as helper from "../helper";
import { parse } from "tns-core-modules/ui/builder";
import { dipToDp, left, top, right, bottom, height, width,
    paddingLeft, paddingTop, paddingRight, paddingBottom,
    equal, closeEnough, notEqual, check,
    heightEqual, widthEqual,
    isLeftAlignedWith, isRightAlignedWith, isTopAlignedWith, isBottomAlignedWith,
    isLeftOf, isRightOf, isBelow, isAbove,
    isLeftWith, isAboveWith, isRightWith, isBelowWith } from "./layout-tests-helper";
var DELTA = 1;

export class SafeAreaTests extends testModule.UITest<any> {

    public create(): any {
        return null;
    }

    // TODO: Start Refactor
    private getViews (template: string) {
        let root = parse(template);
        return {
            root,
            grid: root.getViewById("grid") as GridLayout,
            cells: [
                [ root.getViewById("cell00") as view.View, root.getViewById("cell01") as view.View, root.getViewById("cell02") as view.View ],
                [ root.getViewById("cell10") as view.View, root.getViewById("cell11") as view.View, root.getViewById("cell12") as view.View ],
                [ root.getViewById("cell20") as view.View, root.getViewById("cell21") as view.View, root.getViewById("cell22") as view.View ]
            ]
        };
    };

    private executeSnippet<U extends { root: view.View }>(ui: U, setup: (ui: U) => void, test: (ui: U) => void): 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);
        });
    };

    private noop() {
        // no operation
    };
    // TODO: End Refactor

    public test_layout_in_fullscreen() {
        const snippet = `
        <GridLayout id="grid" backgroundColor="Crimson">
        </GridLayout>
        `;

        this.executeSnippet(
            this.getViews(snippet),
            this.noop,
            ({ root, grid, cells }) => {
                const fullscreenOrigin = { x: 0, y: 0};
                if (platform.isIOS && iosUtils.MajorVersion < 11) {
                    const safeAreaOrigin = grid.parent.nativeViewProtected.safeAreaLayoutGuide.layoutFrame.origin;
                    fullscreenOrigin.y += dipToDp(safeAreaOrigin.y);
                    fullscreenOrigin.x += dipToDp(safeAreaOrigin.x);
                }

                equal(left(grid), fullscreenOrigin.x, `actual:${grid}.left:${left(grid)} expected:${fullscreenOrigin.x}`);
                equal(top(grid), fullscreenOrigin.y, `actual:${grid}.top:${top(grid)} expected:${fullscreenOrigin.y}`);
                equal(right(grid), platform.screen.mainScreen.widthPixels, `actual:${grid}.right:${right(grid)} expected:${platform.screen.mainScreen.widthPixels}`);
                equal(bottom(grid), platform.screen.mainScreen.heightPixels, `actual:${grid}.bottom:${bottom(grid)} expected:${platform.screen.mainScreen.heightPixels}`);
            }
        );
    }

    public test_component_cells_layout_in_safe_area() {
        const snippet = `
        <GridLayout id="grid" rows="*, *, *" columns="*, *, *" backgroundColor="Crimson">
            <Label row="0" col="0" id="cell00" text="overflowing text, overflowing text"></Label>
            <Label row="0" col="1" id="cell01" text="overflowing text, overflowing text"></Label>
            <Label row="0" col="2" id="cell02" text="overflowing text, overflowing text"></Label>
            <Label row="1" col="0" id="cell10" text="overflowing text, overflowing text"></Label>
            <Label row="1" col="1" id="cell11" text="overflowing text, overflowing text"></Label>
            <Label row="1" col="2" id="cell12" text="overflowing text, overflowing text"></Label>
            <Label row="2" col="0" id="cell20" text="overflowing text, overflowing text"></Label>
            <Label row="2" col="1" id="cell21" text="overflowing text, overflowing text"></Label>
            <Label row="2" col="2" id="cell22" text="overflowing text, overflowing text"></Label>
        </GridLayout>
        `;

        this.executeSnippet(
            this.getViews(snippet),
            this.noop,
            ({ root, grid, cells }) => {
                const insets = grid.getSafeAreaInsets();

                equal(left(cells[0][0]), insets.left, `cell00 left actual:<${left(cells[0][0])}> expected:<${insets.left}>`);
                equal(left(cells[1][0]), insets.left, `cell10 left actual:<${left(cells[1][0])}> expected:<${insets.left}>`);
                equal(left(cells[2][0]), insets.left, `cell20 left actual:<${left(cells[2][0])}> expected:<${insets.left}>`);

                isBelowWith(grid, cells[0][0], insets.top);
                isBelowWith(grid, cells[0][1], insets.top);
                isBelowWith(grid, cells[0][2], insets.top);

                equal(right(cells[0][2]), width(grid) - insets.right, `cell02 left actual:<${left(cells[0][2])}> expected:<${width(grid) - insets.right}>`);
                equal(right(cells[1][2]), width(grid) - insets.right, `cell12 left actual:<${left(cells[1][2])}> expected:<${width(grid) - insets.right}>`);
                equal(right(cells[2][2]), width(grid) - insets.right, `cell22 left actual:<${left(cells[2][2])}> expected:<${width(grid) - insets.right}>`);

                isAboveWith(cells[2][0], grid, insets.bottom);
                isAboveWith(cells[2][1], grid, insets.bottom);
                isAboveWith(cells[2][2], grid, insets.bottom);

                equal(height(cells[0][1]), height(cells[1][1]), `cell height should be equal - cell01<${height(cells[0][1])}> - cell11<${height(cells[1][1])}>`);
                equal(height(cells[1][1]), height(cells[2][1]), `cell height should be equal - cell11<${height(cells[1][1])}> - cell21<${height(cells[2][1])}>`);
                const sumOfLabelHeightAndInsets = insets.top + height(cells[0][1]) + height(cells[1][1]) + height(cells[2][1]) + insets.bottom;
                equal(height(grid), sumOfLabelHeightAndInsets, `grid height<${height(grid)}> sum of labels height and insets<${sumOfLabelHeightAndInsets}>`);

                equal(width(cells[1][0]), width(cells[1][1]), `cell width should be equal - cell10<${width(cells[1][0])}> - cell11<${width(cells[1][1])}>`);
                equal(width(cells[1][1]), width(cells[1][2]), `cell width should be equal - cell11<${width(cells[1][1])}> - cell12<${width(cells[1][2])}>`);
                const sumOfLabelWidthsAndInsets = insets.left + width(cells[1][0]) + width(cells[1][1]) + width(cells[1][2]) + insets.right;
                equal(width(grid), sumOfLabelWidthsAndInsets, `grid width<${width(grid)}> sum of nested grids width and insets<${sumOfLabelWidthsAndInsets}>`);
            }
        );
    }

    public test_nested_grid_cells_layout_beyond_safe_area() {
        const snippet = `
        <GridLayout id="grid" rows="*, *, *" columns="*, *, *" backgroundColor="Crimson">
            <GridLayout row="0" col="0" id="cell00" backgroundColor="SkyBlue"></GridLayout>
            <GridLayout row="0" col="1" id="cell01" backgroundColor="Indigo"></GridLayout>
            <GridLayout row="0" col="2" id="cell02" backgroundColor="Crimson"></GridLayout>
            <GridLayout row="1" col="0" id="cell10" backgroundColor="Chocolate"></GridLayout>
            <GridLayout row="1" col="1" id="cell11" backgroundColor="Cornsilk"></GridLayout>
            <GridLayout row="1" col="2" id="cell12" backgroundColor="BurlyWood"></GridLayout>
            <GridLayout row="2" col="0" id="cell20" backgroundColor="GoldenRod"></GridLayout>
            <GridLayout row="2" col="1" id="cell21" backgroundColor="Khaki"></GridLayout>
            <GridLayout row="2" col="2" id="cell22" backgroundColor="IndianRed"></GridLayout>
        </GridLayout>
        `;

        this.executeSnippet(
            this.getViews(snippet),
            this.noop,
            ({ root, grid, cells }) => {                
                isLeftAlignedWith(grid, cells[0][0]);
                isLeftAlignedWith(grid, cells[1][0]);
                isLeftAlignedWith(grid, cells[2][0]);

                isTopAlignedWith(grid, cells[0][0]);
                isTopAlignedWith(grid, cells[0][1]);
                isTopAlignedWith(grid, cells[0][2]);

                isRightAlignedWith(grid, cells[0][2]);
                isRightAlignedWith(grid, cells[1][2]);
                isRightAlignedWith(grid, cells[2][2]);

                isBottomAlignedWith(grid, cells[2][0]);
                isBottomAlignedWith(grid, cells[2][1]);
                isBottomAlignedWith(grid, cells[2][2]);

                check(height(cells[0][1]) >= height(cells[1][1]), `cell01 height<${height(cells[0][1])}> not greater or equal cell11 height<${height(cells[1][1])}>`);
                check(height(cells[1][1]) <= height(cells[2][1]), `cell11 height<${height(cells[1][1])}> not less or equal cell21 height<${height(cells[2][1])}>`);
                const sumOfNestedGridHeights = height(cells[0][1]) + height(cells[1][1]) + height(cells[2][1]);
                equal(height(grid), sumOfNestedGridHeights, `grid height<${height(grid)}> sum of nested grids height <${sumOfNestedGridHeights}>`);

                check(width(cells[1][0]) >= width(cells[1][1]), `cell10 width<${width(cells[1][0])}> not greater or equal cell11 width<${width(cells[1][1])}>`);
                check(width(cells[1][1]) <= width(cells[1][2]), `cell11 width<${width(cells[1][1])}> not less or equal cell12 width<${width(cells[1][2])}>`);
                const sumOfNestedGridWidths = width(cells[1][0]) + width(cells[1][1]) + width(cells[1][2])
                equal(width(grid), sumOfNestedGridWidths, `grid width<${width(grid)}> sum of nested grids width <${sumOfNestedGridWidths}>`);
            }
        );
    }
}

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