import { afterEach, describe, expect, it, vi } from "vitest";
import { createMockSelection, createStore, createMockZoomableCanvas, mockZCanvas } from "../mocks";

mockZCanvas();

import DocumentFactory from "@/model/factories/document-factory";
import LayerFactory from "@/model/factories/layer-factory";
import { createRendererForLayer, flushRendererCache } from "@/model/factories/renderer-factory";
import { getLastShape, roundSelection, scaleSelection, selectionToRectangle, syncSelection } from "@/utils/selection-util";

describe( "Selection utilities", () => {
    const selection = [
        [
            { x: 10, y: 5 },
            { x: 50, y: 5 },
            { x: 50, y: 55 },
            { x: 10, y: 55 }
        ], [
            { x: 25, y: 25 },
            { x: 75, y: 25 },
            { x: 75, y: 75 },
            { x: 25, y: 75 },
        ]
    ];

    afterEach(() => {
        flushRendererCache();
    });

    describe( "when calculating the bounding box rectangle for a selection", () => {
        it( "should be able to calculate the bounding box of a selection with a single Shape", () => {
            expect( selectionToRectangle( [ selection[ 1 ]] )).toEqual({
                left: 25,
                top: 25,
                width: 50,
                height: 50
            });
        });

        it( "should be able to calculate the bounding box of a selection with multiple Shapes", () => {
            expect( selectionToRectangle( selection )).toEqual({
                left: 10,
                top: 5,
                width: 65,
                height: 70
            });
        });
    });

    it( "should be able to round the Shape coordinates inside a selection", () => {
        expect( roundSelection([
            [
                { x: 4.25, y: 5.56 }, { x: 5.55, y: 5.56 }, { x: 5.55, y: 7.2 }, { x: 4.25, y: 5.56 },
            ],
            [
                { x: 2.25, y: 2.56 }, { x: 4.55, y: 5.56 }, { x: 4.55, y: 7.2 }, { x: 2.25, y: 5.56 },
            ]
        ])).toEqual([
            [
                { x: 4, y: 6 }, { x: 6, y: 6 }, { x: 6, y: 7 }, { x: 4, y: 6 },
            ],
            [
                { x: 2, y: 3 }, { x: 5, y: 6 }, { x: 5, y: 7 }, { x: 2, y: 6 },
            ]
        ]);
    });

    it( "should be able to scale the Shapes inside a selection", () => {
        expect( scaleSelection( selection, 1.5 )).toEqual([
            [
                { x: 15, y: 7.5 },
                { x: 75, y: 7.5 },
                { x: 75, y: 82.5 },
                { x: 15, y: 82.5 }
            ], [
                { x: 37.5,  y: 37.5 },
                { x: 112.5, y: 37.5 },
                { x: 112.5, y: 112.5 },
                { x: 37.5,  y: 112.5 }
            ]
        ]);
    });

    it( "should be able to retrieve the last shape in the selection", () => {
        expect( getLastShape( selection )).toEqual( selection.at( -1 ));
    });

    it( "should be able to synchronize a selection with a specific Layers renderer", () => {
        const store = createStore();
        // @ts-expect-error getters is readonly
        store.getters = {
            activeDocument: DocumentFactory.create({
                activeSelection: createMockSelection(),
            }),
            activeLayer: LayerFactory.create(),
        };
        const renderer = createRendererForLayer( createMockZoomableCanvas(), store.getters.activeLayer, true );
        const setSelectionSpy = vi.spyOn( renderer, "setSelection" );

        syncSelection( store );

        expect( setSelectionSpy ).toHaveBeenCalledWith( store.getters.activeDocument );
    });
});