/**
 * Solver Runtime
 * @param physics GameLib.D3.Graphics
 * @param apiSolver GameLib.D3.API.Solver
 * @constructor
 */
GameLib.D3.Solver = function (
    physics,
    apiSolver
) {

    this.physics = physics;
    this.physics.isNotCannonThrow();

    if (GameLib.Utils.UndefinedOrNull(apiSolver)) {
        apiSolver = {};
    }

    if (apiSolver instanceof GameLib.D3.Solver) {
        return apiSolver;
    }

    GameLib.D3.API.Solver.call(
        this,
        apiSolver.id,
        apiSolver.name,
        apiSolver.solverType,
        apiSolver.iterations,
        apiSolver.tolerance,
        apiSolver.parentEntity
    );

    GameLib.Component.call(
        this,
        GameLib.Component.COMPONENT_SOLVER
    );
};

GameLib.D3.Solver.prototype = Object.create(GameLib.D3.API.Solver.prototype);
GameLib.D3.Solver.prototype.constructor = GameLib.D3.Solver;

/**
 *
 * @returns {*}
 */
GameLib.D3.Solver.prototype.createInstance = function() {

    if (this.solverType === GameLib.D3.Solver.GS_SOLVER) {
        this.instance = new CANNON.GSSolver();
    } else if (this.solverType === GameLib.D3.Solver.SPLIT_SOLVER) {
        this.instance = new CANNON.SplitSolver();
    } else {
       	throw new Error('unsupported solver type: ' + this.solverType);
    }

    this.instance.tolerance = this.tolerance;
    this.instance.iterations = this.iterations;

    GameLib.Component.prototype.createInstance.call(this);
};

/**
 *
 */
GameLib.D3.Solver.prototype.updateInstance = function() {

    if (this.solverType === GameLib.D3.Solver.GS_SOLVER) {
        if (!(this.instance instanceof CANNON.GSSolver)) {
            this.instance = new CANNON.GSSolver();
        }
    }

	if (this.solverType === GameLib.D3.Solver.SPLIT_SOLVER) {
		if (!(this.instance instanceof CANNON.SplitSolver)) {
			this.instance = new CANNON.SplitSolver();
		}
	}

	this.instance.iterations = this.iterations;
    this.instance.tolerance = this.tolerance;
};

/**
 * GameLib.D3.Solver to GameLib.D3.API.Solver
 * @returns {GameLib.D3.API.Solver}
 */
GameLib.D3.Solver.prototype.toApiObject = function() {

    var apiSolver = new GameLib.D3.API.Solver(
        this.id,
        this.name,
        this.solverType,
        this.iterations,
        this.tolerance,
        GameLib.Utils.IdOrNull(this.parentEntity)
    );

    return apiSolver;
};

/**
 * GameLib.D3.Solver from Object Solver
 * @param graphics
 * @param objectComponent
 * @returns {GameLib.D3.Solver}
 * @constructor
 */
GameLib.D3.Solver.FromObject = function(graphics, objectComponent) {

    var apiSolver = GameLib.D3.API.Solver.FromObject(objectComponent);

    return new GameLib.D3.Solver(
        graphics,
        apiSolver
    );
};

/**
 * Solver Types
 * @type {number}
 */
GameLib.D3.Solver.GS_SOLVER 	= 0x1;
GameLib.D3.Solver.SPLIT_SOLVER  = 0x2;