var gulp         = require('gulp');
var concat       = require('gulp-concat');
var sort         = require('gulp-sort');
var minify       = require('gulp-minify');
var replace      = require('gulp-string-replace');

gulp.task('build', build);
gulp.task('monitor', monitor);

var code = 'if (R3.Utils.UndefinedOrNull(apiComponent)) {\n';
code 	+= '\t\tapiComponent = {};\n';
code	+= '\t}\n';
code	+= '\tthis.apiComponent = apiComponent;\n';
code	+= '\n';
code	+= '\tR3.API.Component.call(\n';
code	+= '\t\tthis,\n';
code	+= '\t\tthis.apiComponent.parent,\n';
code	+= '\t\tthis.apiComponent.id,\n';
code	+= '\t\tthis.apiComponent.name\n';
code	+= '\t);';

var code2 = 'if (R3.Utils.UndefinedOrNull(apiGeometryBuffer)) {\n';
code2	+= '\t\tapiGeometryBuffer = {};\n';
code2	+= '\t}\n';
code2	+= '\tthis.apiGeometryBuffer = apiGeometryBuffer;\n';
code2	+= '\n';
code2	+= '\tR3.D3.API.Geometry.Buffer.call(\n';
code2	+= '\t\tthis,\n';
code2	+= '\t\tthis.apiGeometryBuffer,\n';
code2	+= '\t\tthis.apiGeometryBuffer.attributes,\n';
code2	+= '\t\tthis.apiGeometryBuffer.drawRange,\n';
code2	+= '\t\tthis.apiGeometryBuffer.groups,\n';
code2	+= '\t\tthis.apiGeometryBuffer.index,\n';
code2	+= '\t\tthis.apiGeometryBuffer.morphAttributes\n';
code2	+= '\t);';

var code3 = 'if (R3.Utils.UndefinedOrNull(apiGeometryNormal)) {\n';
code3	+= '\t\tapiGeometryNormal = {};\n';
code3	+= '\t}\n';
code3	+= '\tthis.apiGeometryNormal = apiGeometryNormal;\n';
code3	+= '\n';
code3	+= '\tR3.D3.API.Geometry.Normal.call(\n';
code3	+= '\t\tthis,\n';
code3	+= '\t\tthis.apiGeometryNormal,\n';
code3	+= '\t\tthis.apiGeometryNormal.colors,\n';
code3	+= '\t\tthis.apiGeometryNormal.lineDistances,\n';
code3	+= '\t\tthis.apiGeometryNormal.morphTargets,\n';
code3	+= '\t\tthis.apiGeometryNormal.morphNormals,\n';
code3	+= '\t\tthis.apiGeometryNormal.skinWeights,\n';
code3	+= '\t\tthis.apiGeometryNormal.skinIndices,\n';
code3	+= '\t\tthis.apiGeometryNormal.verticesNeedsUpdate,\n';
code3	+= '\t\tthis.apiGeometryNormal.elementsNeedUpdate,\n';
code3	+= '\t\tthis.apiGeometryNormal.uvsNeedUpdate,\n';
code3	+= '\t\tthis.apiGeometryNormal.normalsNeedUpdate,\n';
code3	+= '\t\tthis.apiGeometryNormal.colorsNeedUpdate,\n';
code3	+= '\t\tthis.apiGeometryNormal.groupsNeedUpdate,\n';
code3	+= '\t\tthis.apiGeometryNormal.lineDistancesNeedUpdate\n';
code3	+= '\t);';

var code4 = 'if (R3.Utils.UndefinedOrNull(apiMaterial)) {\n';
code4	+= '\t\tapiMaterial = {};\n';
code4	+= '\t}\n';
code4	+= '\tthis.apiMaterial = apiMaterial;\n';
code4	+= '\n';
code4	+= '\tR3.D3.API.Material.call(\n';
code4	+= '\t\tthis,\n';
code4	+= '\t\tthis.apiMaterial,\n';
code4	+= '\t\tthis.apiMaterial.parentMeshes,\n';
code4	+= '\t\tthis.apiMaterial.alphaTest,\n';
code4	+= '\t\tthis.apiMaterial.blendDst,\n';
code4	+= '\t\tthis.apiMaterial.blendDstAlpha,\n';
code4	+= '\t\tthis.apiMaterial.blendEquation,\n';
code4	+= '\t\tthis.apiMaterial.blendEquationAlpha,\n';
code4	+= '\t\tthis.apiMaterial.blending,\n';
code4	+= '\t\tthis.apiMaterial.blendSrc,\n';
code4	+= '\t\tthis.apiMaterial.blendSrcAlpha,\n';
code4	+= '\t\tthis.apiMaterial.clipIntersection,\n';
code4	+= '\t\tthis.apiMaterial.clippingPlanes,\n';
code4	+= '\t\tthis.apiMaterial.clipShadows,\n';
code4	+= '\t\tthis.apiMaterial.colorWrite,\n';
code4	+= '\t\tthis.apiMaterial.customDepthMaterial,\n';
code4	+= '\t\tthis.apiMaterial.customDistanceMaterial,\n';
code4	+= '\t\tthis.apiMaterial.defines,\n';
code4	+= '\t\tthis.apiMaterial.depthFunc,\n';
code4	+= '\t\tthis.apiMaterial.depthTest,\n';
code4	+= '\t\tthis.apiMaterial.depthWrite,\n';
code4	+= '\t\tthis.apiMaterial.fog,\n';
code4	+= '\t\tthis.apiMaterial.lights,\n';
code4	+= '\t\tthis.apiMaterial.opacity,\n';
code4	+= '\t\tthis.apiMaterial.overdraw,\n';
code4	+= '\t\tthis.apiMaterial.polygonOffset,\n';
code4	+= '\t\tthis.apiMaterial.polygonOffsetFactor,\n';
code4	+= '\t\tthis.apiMaterial.polygonOffsetUnits,\n';
code4	+= '\t\tthis.apiMaterial.precision,\n';
code4	+= '\t\tthis.apiMaterial.premultipliedAlpha,\n';
code4	+= '\t\tthis.apiMaterial.dithering,\n';
code4	+= '\t\tthis.apiMaterial.flatShading,\n';
code4	+= '\t\tthis.apiMaterial.side,\n';
code4	+= '\t\tthis.apiMaterial.transparent,\n';
code4	+= '\t\tthis.apiMaterial.vertexColors,\n';
code4	+= '\t\tthis.apiMaterial.visible\n';
code4	+= '\t);';

var code5 = 'if (R3.Utils.UndefinedOrNull(apiTexture)) {\n';
code5	+= '\t\tapiTexture = {};\n';
code5	+= '\t}\n';
code5	+= '\tthis.apiTexture = apiTexture;\n';
code5	+= '\n';
code5	+= '\tR3.D3.API.Texture.call(\n';
code5	+= '\t\tthis,\n';
code5	+= '\t\tthis.apiTexture,\n';
code5	+= '\t\tthis.apiTexture.parentMaterials,\n';
code5	+= '\t\tthis.apiTexture.mipmaps,\n';
code5	+= '\t\tthis.apiTexture.mapping,\n';
code5	+= '\t\tthis.apiTexture.wrapS,\n';
code5	+= '\t\tthis.apiTexture.wrapT,\n';
code5	+= '\t\tthis.apiTexture.magFilter,\n';
code5	+= '\t\tthis.apiTexture.minFilter,\n';
code5	+= '\t\tthis.apiTexture.anisotropy,\n';
code5	+= '\t\tthis.apiTexture.format,\n';
code5	+= '\t\tthis.apiTexture.storageType,\n';
code5	+= '\t\tthis.apiTexture.offset,\n';
code5	+= '\t\tthis.apiTexture.repeat,\n';
code5	+= '\t\tthis.apiTexture.rotation,\n';
code5	+= '\t\tthis.apiTexture.center,\n';
code5	+= '\t\tthis.apiTexture.matrixAutoUpdate,\n';
code5	+= '\t\tthis.apiTexture.generateMipMaps,\n';
code5	+= '\t\tthis.apiTexture.premultiplyAlpha,\n';
code5	+= '\t\tthis.apiTexture.flipY,\n';
code5	+= '\t\tthis.apiTexture.unpackAlignment,\n';
code5	+= '\t\tthis.apiTexture.encoding,\n';
code5	+= '\t\tthis.apiTexture.version,\n';
code5	+= '\t\tthis.apiTexture.animated,\n';
code5	+= '\t\tthis.apiTexture.reverseAnimation,\n';
code5	+= '\t\tthis.apiTexture.forward\n';
code5	+= '\t);';

function build() {
    return gulp.src('./src/r3-*.js')
        .pipe(sort())
        .pipe(concat('r3.js'))
        .pipe(replace('__DATE__', new Date().toString()))
        .pipe(replace('__API_COMPONENT_MACRO__', code))
        .pipe(replace('__API_GEOMETRY_BUFFER_MACRO__', code2))
        .pipe(replace('__API_GEOMETRY_NORMAL_MACRO__', code3))
        .pipe(replace('__API_MATERIAL_MACRO__', code4))
        .pipe(replace('__API_TEXTURE_MACRO__', code5))
        .pipe(minify({
            ext:{
                src:'.js',
                min:'-min.js'
            }
        }))
        .pipe(gulp.dest('./build/'));
}


function monitor() {
    gulp.watch('src/*.js', build);
}

gulp.task(
    'default',
    gulp.series(
        build,
        monitor
    )
);