import {SymbolStyleLayer} from '../style/style_layer/symbol_style_layer';
import {FormatSectionOverride} from '../style/format_section_override';
import properties, {SymbolPaintPropsPossiblyEvaluated} from '../style/style_layer/symbol_style_layer_properties.g';
import {ZoomHistory} from '../style/zoom_history';
import {EvaluationParameters} from '../style/evaluation_parameters';

function createSymbolLayer(layerProperties) {
    const layer = new SymbolStyleLayer(layerProperties);
    layer.recalculate({zoom: 0, zoomHistory: {} as ZoomHistory} as EvaluationParameters, []);
    return layer;
}

function isOverridden(paintProperty) {
    if (paintProperty.value.kind === 'source' || paintProperty.value.kind === 'composite') {
        return paintProperty.value._styleExpression.expression instanceof FormatSectionOverride;
    }
    return false;
}

describe('setPaintOverrides', () => {
    test('setPaintOverrides, no overrides', () => {
        const layer = createSymbolLayer({});
        layer._setPaintOverrides();
        for (const overridable of properties.paint.overridableProperties) {
            expect(isOverridden(layer.paint.get(overridable as keyof SymbolPaintPropsPossiblyEvaluated))).toBe(false);
        }

    });

    test('setPaintOverrides, format expression, overridden text-color', () => {
        const props = {layout: {'text-field': ['format', 'text', {'text-color': 'yellow'}]}};
        const layer = createSymbolLayer(props);
        layer._setPaintOverrides();
        expect(isOverridden(layer.paint.get('text-color'))).toBe(true);

    });

    test('setPaintOverrides, format expression, no overrides', () => {
        const props = {layout: {'text-field': ['format', 'text', {}]}};
        const layer = createSymbolLayer(props);
        layer._setPaintOverrides();
        expect(isOverridden(layer.paint.get('text-color'))).toBe(false);

    });

});

describe('hasPaintOverrides', () => {
    test('undefined', () => {
        const layer = createSymbolLayer({});
        expect(SymbolStyleLayer.hasPaintOverride(layer.layout, 'text-color')).toBe(false);

    });

    test('constant, Formatted type, overridden text-color', () => {
        const props = {layout: {'text-field': ['format', 'text', {'text-color': 'red'}]}};
        const layer = createSymbolLayer(props);
        expect(SymbolStyleLayer.hasPaintOverride(layer.layout, 'text-color')).toBe(true);

    });

    test('constant, Formatted type, no overrides', () => {
        const props = {layout: {'text-field': ['format', 'text', {'font-scale': 0.8}]}};
        const layer = createSymbolLayer(props);
        expect(SymbolStyleLayer.hasPaintOverride(layer.layout, 'text-color')).toBe(false);

    });

    test('format expression, overridden text-color', () => {
        const props = {layout: {'text-field': ['format', ['get', 'name'], {'text-color': 'red'}]}};
        const layer = createSymbolLayer(props);
        expect(SymbolStyleLayer.hasPaintOverride(layer.layout, 'text-color')).toBe(true);

    });

    test('format expression, no overrides', () => {
        const props = {layout: {'text-field': ['format', ['get', 'name'], {}]}};
        const layer = createSymbolLayer(props);
        expect(SymbolStyleLayer.hasPaintOverride(layer.layout, 'text-color')).toBe(false);

    });

    test('nested expression, overridden text-color', () => {
        const matchExpr = ['match', ['get', 'case'],
            'one', ['format', 'color', {'text-color': 'blue'}],
            'default'];
        const props = {layout: {'text-field': matchExpr}};
        const layer = createSymbolLayer(props);
        expect(SymbolStyleLayer.hasPaintOverride(layer.layout, 'text-color')).toBe(true);

    });

    test('nested expression, no overrides', () => {
        const matchExpr = ['match', ['get', 'case'],
            'one', ['format', 'b&w', {}],
            'default'];
        const props = {layout: {'text-field': matchExpr}};
        const layer = createSymbolLayer(props);
        expect(SymbolStyleLayer.hasPaintOverride(layer.layout, 'text-color')).toBe(false);

    });

});