/// <reference path="../../scripts/jquery-3.5.1.min.js"/>
/// <reference path="../../_shared/math/vec2.js" />
/// <reference path="../../_shared/math/mat4.js" />
/// <reference path="../../_shared/2d/shader.js" />
/// <reference path="../../_shared/math/rectangle.js" />
/// <reference path="../../_shared/math/line2.js" />
/// <reference path="../../_shared/math/collision.js" />
/// <reference path="../../_shared/2d/program_common.js" />

(function() {
    var programContext,
        rectangleObject,
        lineObjectList,
        programInfo,
        exitRequestFunc;

    function main() {
        programContext = getContext('#rectangle_line_collision');
    
        if (programContext.gl === null) {
            console.error('Unable to initialize WebGL. Your browser or machine may not support it.');
            return;
        }
    
        programContext.gl.clearColor(0.1, 0.15, 0.2, 1.0);
        programContext.gl.clear(programContext.gl.COLOR_BUFFER_BIT);
        programContext.playButton.on('click', run);
    }
    
    function run() {
        console.log('Running Rectangle-Line Collisions');
        programContext.load().then(function(pProgramInfo) {
            programInfo = pProgramInfo;

            rectangleObject = rectangle(programContext.gl, { 
                width: 50, 
                height: 25, 
                color: { x: 0.3, y: 0.5, z: 0.1, w: 0.7 },
                position: vec2(programContext.width / 2.0 - 100, programContext.height / 2.0 + 100)
            });
            rectangleObject.velocity = vec2(0, -50);

            lineObjectList = [];
            
            lineObjectList.push(line2({ x: 100, y: 100 }, { x: programContext.width - 100, y: 200 }, programContext.gl,
                { x: 1, y: 0, z: 0, w: 1 }, 2.0));

            lineObjectList.push(line2({ x: 100, y: 200 }, { x: programContext.width - 100, y: 100 }, programContext.gl,
                { x: 1, y: 1, z: 0, w: 1 }, 2.0));

            lineObjectList.push(line2({ x: 100, y: 0 }, { x: 100, y: programContext.height }, programContext.gl,
                { x: 0, y: 1, z: 0, w: 1 }, 2.0));

            lineObjectList.push(line2({ x: programContext.width - 100, y: 0 }, { x: programContext.width - 100, y: programContext.height }, programContext.gl,
                { x: 0, y: 1, z: 0, w: 1 }, 2.0));
            

            exitRequestFunc = requestUpdateLoop(update, cleanup);
            programContext.stopButton.on('click', reset);
        });
    }

    function update(pDeltaTimeSeconds) {
        pDeltaTimeSeconds = pDeltaTimeSeconds;
        updateRigidBody2(rectangleObject, pDeltaTimeSeconds);
        collision(pDeltaTimeSeconds);
        render();
    }

    function collision(pDeltaTimeSeconds) {
        
    }

    function render() {
        programContext.gl.clearColor(0.1, 0.15, 0.2, 1.0);
        programContext.gl.clearDepth(1.0);
        programContext.gl.enable(programContext.gl.DEPTH_TEST);
        programContext.gl.depthFunc(programContext.gl.LEQUAL);
        programContext.gl.clear(programContext.gl.COLOR_BUFFER_BIT | programContext.gl.DEPTH_BUFFER_BIT);
        programContext.gl.useProgram(programInfo.program);
        programContext.gl.uniformMatrix4fv(programInfo.uniformLocations.projection, false, programContext.perspective);

        programInfo.renderShape(rectangleObject);
        lineObjectList.forEach(function(lineObject) {
            renderLine2(programContext.gl, programInfo, lineObject);
        });
    }

    function cleanup() {
        programContext.gl.deleteBuffer(rectangleObject.buffer);
        lineObjectList.forEach(function(lineObject) {
            programContext.gl.deleteBuffer(lineObject.buffer);
        });
        programContext.gl.deleteProgram(programInfo.program);
        programContext.gl.clearColor(0.1, 0.15, 0.2, 1.0);
        programContext.gl.clear(programContext.gl.COLOR_BUFFER_BIT);
    }

    function reset() {
        exitRequestFunc();
        programContext.reset();
    }
    
    $(document).ready(main);
})()