// Copyright (c) 2015 - 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
import { log } from '@deck.gl/core';
import IconLayer from "../../icon-layer/icon-layer.js";
import fs from "./multi-icon-layer-fragment.glsl.js";
// TODO expose as layer properties
const DEFAULT_BUFFER = 192.0 / 256;
const EMPTY_ARRAY = [];
const defaultProps = {
    getIconOffsets: { type: 'accessor', value: (x) => x.offsets },
    alphaCutoff: 0.001,
    smoothing: 0.1,
    outlineWidth: 0,
    outlineColor: { type: 'color', value: [0, 0, 0, 255] }
};
class MultiIconLayer extends IconLayer {
    getShaders() {
        return { ...super.getShaders(), fs };
    }
    initializeState() {
        super.initializeState();
        const attributeManager = this.getAttributeManager();
        attributeManager.addInstanced({
            instanceOffsets: {
                size: 2,
                accessor: 'getIconOffsets'
            },
            instancePickingColors: {
                type: 'uint8',
                size: 3,
                accessor: (object, { index, target: value }) => this.encodePickingColor(index, value)
            }
        });
    }
    updateState(params) {
        super.updateState(params);
        const { props, oldProps } = params;
        let { outlineColor } = props;
        if (outlineColor !== oldProps.outlineColor) {
            outlineColor = outlineColor.map(x => x / 255);
            outlineColor[3] = Number.isFinite(outlineColor[3]) ? outlineColor[3] : 1;
            this.setState({
                outlineColor
            });
        }
        if (!props.sdf && props.outlineWidth) {
            log.warn(`${this.id}: fontSettings.sdf is required to render outline`)();
        }
    }
    draw(params) {
        const { sdf, smoothing, outlineWidth } = this.props;
        const { outlineColor } = this.state;
        const outlineBuffer = outlineWidth
            ? Math.max(smoothing, DEFAULT_BUFFER * (1 - outlineWidth))
            : -1;
        params.uniforms = {
            ...params.uniforms,
            // Refer the following doc about gamma and buffer
            // https://blog.mapbox.com/drawing-text-with-signed-distance-fields-in-mapbox-gl-b0933af6f817
            sdfBuffer: DEFAULT_BUFFER,
            outlineBuffer,
            gamma: smoothing,
            sdf: Boolean(sdf),
            outlineColor
        };
        super.draw(params);
        // draw text without outline on top to ensure a thick outline won't occlude other characters
        if (sdf && outlineWidth) {
            const { iconManager } = this.state;
            const iconsTexture = iconManager.getTexture();
            const model = this.state.model;
            if (iconsTexture) {
                model.setUniforms({ outlineBuffer: DEFAULT_BUFFER });
                model.draw(this.context.renderPass);
            }
        }
    }
    getInstanceOffset(icons) {
        return icons ? Array.from(icons).flatMap(icon => super.getInstanceOffset(icon)) : EMPTY_ARRAY;
    }
    getInstanceColorMode(icons) {
        return 1; // mask
    }
    getInstanceIconFrame(icons) {
        return icons
            ? Array.from(icons).flatMap(icon => super.getInstanceIconFrame(icon))
            : EMPTY_ARRAY;
    }
}
MultiIconLayer.defaultProps = defaultProps;
MultiIconLayer.layerName = 'MultiIconLayer';
export default MultiIconLayer;