/**
 * This file is part of Satie music engraver <https://github.com/jnetterf/satie>.
 * Copyright (C) Joshua Netterfield <joshua.ca> 2015 - present.
 * 
 * Satie is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * Satie is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with Satie.  If not, see <http://www.gnu.org/licenses/>.
 */

import {IModel, ILayout, Type} from "./document";

import {IReadOnlyValidationCursor, LayoutCursor} from "./private_cursor";
import {IBoundingRect} from "./private_boundingRect";

class VisualCursorModel implements Export.IVisualCursorModel {
    _class = "VisualCursor";

    /*---- I.1 IModel ---------------------------------------------------------------------------*/

    /** @prototype only */
    divCount: number;

    /** @prototype only */
    divisions: number;

    staffIdx: number = 1;

    static _lastIdx = 1;
    _myIdx = ++VisualCursorModel._lastIdx;

    /*---- Implementation -----------------------------------------------------------------------*/

    constructor(spec: VisualCursorModel) {
        // no-op
    }

    refresh(cursor: IReadOnlyValidationCursor): void {
        // no-op
    }

    getLayout(cursor: LayoutCursor): Export.IVisualCursorLayout {
        return new VisualCursorModel.Layout(this, cursor);
    }

    toXML(): string {
        return `<!-- visual cursor -->\n`;
    }

    toJSON(): any {
        let {
            _class,
        } = this;

        return {
            _class,
        };
    }

    inspect() {
        return this.toXML();
    }

    calcWidth(shortest: number) {
        return 0;
    }
}

VisualCursorModel.prototype.divCount = 0;
VisualCursorModel.prototype.divisions = 0;

module VisualCursorModel {
    export class Layout implements Export.IVisualCursorLayout {
        constructor(origModel: VisualCursorModel, cursor: LayoutCursor) {
            this.model = origModel;
            this.x = cursor.segmentX;
            this.division = cursor.segmentDivision;
            this.renderedWidth = 0;
        }

        /*---- ILayout ------------------------------------------------------*/

        // Constructed:

        model: VisualCursorModel;
        x: number;
        division: number;

        renderedWidth: number;

        // Prototype:

        boundingBoxes: IBoundingRect[];
        renderClass: Type;
        expandPolicy: "none";
    }

    Layout.prototype.expandPolicy = "none";
    Layout.prototype.renderClass = Type.VisualCursor;
    Layout.prototype.boundingBoxes = [];
    Object.freeze(Layout.prototype.boundingBoxes);
};

/**
 * Registers VisualCursor in the factory structure passed in.
 */
function Export(constructors: { [key: number]: any }) {
    constructors[Type.VisualCursor] = VisualCursorModel;
}

module Export {
    export interface IVisualCursorModel extends IModel {
    }

    export interface IVisualCursorLayout extends ILayout {
        renderedWidth: number;
    }
}

export default Export;