const gulp = require("gulp"),
    fs = require("fs"),
    sizeOf = require("image-size"),
    ftp = require("vinyl-ftp"),
    imageResize = require("gulp-image-resize"),
    conn = ftp.create({
        host: "ssh.jim-fx.com:2221",
        user: process.env.FTP_USERNAME,
        password: process.env.FTP_PASSWORD,
        parallel: 10,
        log: console.log
    });

String.prototype.replaceAll = function (search, replacement) {
    var target = this;
    return target.replace(new RegExp(search, "g"), replacement);
};

function getSceneConfigs(callback) {
    fs.readdir("./assets", function (err, dir) {
        dir = dir.filter(file => file.indexOf(".json") !== -1);
        if (!err) {
            let length = dir.length;
            let configs = [];
            dir.forEach(item => {
                fs.readFile("./assets/" + item, function (err, file) {
                    if (!err) {
                        try {
                            configs.push(JSON.parse(file));
                        } catch (err) {
                            console.log(err)
                        }
                        length -= 1;
                        if (length === 0) {
                            callback(configs);
                        }
                    } else {
                        console.log(err);
                    }
                });
            });
        } else {
            console.log(err);
        }
    });
}

gulp.task("upload", function () {
    gulp.src("./dist/**", {
        base: "./",
        buffer: false
    })
        .pipe(conn.dest("./modern/"));
})

function buildModels() {
    getSceneConfigs(function (configs) {
        console.log("Compiling Models")
        configs.forEach(config => {
            let objectsLeft = config.objects.length;
            let objects = {};
            config.objects.forEach(model => {
                fs.readFile("./assets/" + config.name + "/models/" + model.name + ".json", function (err, jsonFile) {
                    objects[model.name] = JSON.parse(jsonFile);
                    objectsLeft -= 1;
                    if (objectsLeft === 0) {
                        fs.writeFile("./dist/data/" + config.name + "/" + config.name + "_objects.json", JSON.stringify(objects).replace(/("[^"]*")|\s/g, "$1"), function (err) {
                            if (err) {
                                console.log(err);
                            } else {
                                console.log("Finished Scene File " + config.name + ".json \r")
                            }
                        });
                    }
                });
            });
        });
    });
}
gulp.task("buildModels", buildModels);

function buildTextures() {
    getSceneConfigs(function (configs) {
        console.log("Resizing Textures \n")
        configs.forEach(config => {
            Object.keys(config.materials).forEach(mat => {
                Object.keys(config.materials[mat]).forEach(material => {
                    let _mat = config.materials[mat][material];
                    if (typeof (_mat) === "string") {
                        if (_mat.indexOf("jpg") !== -1 || _mat.indexOf("png") !== -1) {

                            let size = sizeOf("./assets/" + config.name + "/textures/" + _mat);
                            if (size.width !== size.height) {
                                console.error("Texture " + _mat + " is not square");
                            }

                            let imgConf = {
                                format: "jpg",
                                width: 512,
                                height: 512,
                                upscale: true
                            };

                            switch (size.width) {
                                case 512:
                                    imgConf.width = 512;
                                    imgConf.height = 512;
                                    break;
                                case 1024:
                                    imgConf.width = 512;
                                    imgConf.height = 512;
                                    break;
                                case 2048:
                                    imgConf.width = 1024;
                                    imgConf.height = 1024;
                                    break;
                                case 4096:
                                    imgConf.width = 1024;
                                    imgConf.height = 1024;
                                    break;
                                default:
                                    break;
                            }

                            if (material = "lightMap") {
                                imgConf.width *= 2;
                                imgConf.height *= 2;
                            }

                            let placeholderConf = {
                                format: "jpg",
                                width: imgConf.width / 8,
                                height: imgConf.width / 8,
                                upscale: true,
                                quality: 0.2
                            };

                            gulp.src("./assets/" + config.name + "/textures/" + _mat)
                                .pipe(imageResize(imgConf))
                                .pipe(gulp.dest("./dist/data/" + config.name + "/textures/"))
                                .pipe(imageResize(placeholderConf))
                                .pipe(gulp.dest("./dist/data/" + config.name + "/textures/small/"))
                                .on("end", () => {
                                    process.stdout.write("Finished Texture: " + _mat + "\r")
                                });
                        }
                    }
                });
            });
        });
    });
}
gulp.task("buildTextures", buildTextures);

function buildHdris() {
    getSceneConfigs(function (configs) {
        console.log("Resizing Hdris");
        configs.forEach(config => {
            Object.keys(config.hdris).forEach(hdri => {
                let url = "./assets/" + config.name + "/hdris/" + config.hdris[hdri].path;
                gulp.src(url)
                    .pipe(imageResize({
                        format: "jpg",
                        width: 1024,
                        height: 512,
                        upscale: true
                    }))
                    .pipe(gulp.dest("./dist/data/" + config.name + "/hdris/"))
                    .on("end", () => {
                        process.stdout.write("Finished HDRI: " + hdri + "\r")
                    });
            });
        });
    });
}
gulp.task("buildHdris", buildHdris);


function buildSceneFiles() {
    getSceneConfigs(function (configs) {
        console.log("Building Scene Files")
        configs.forEach(config => {
            fs.writeFile("./dist/data/" + config.name + "/" + config.name + ".json", JSON.stringify(config).replace(/("[^"]*")|\s/g, "$1").replaceAll(".png", ".jpg"), function (err) {
                if (err) {
                    console.log(err);
                } else {
                    console.log("Finished Scene File: " + config.name + "\n")
                }
            });
        });
    });
}
gulp.task("buildSceneFiles", function () {
    buildSceneFiles();
});

gulp.task("build", function () {
    buildSceneFiles();
    buildModels();
    buildTextures();
    buildHdris();
})

gulp.task("watch", function () {
    gulp.watch("./assets/*/textures/**", ["buildTextures"]);
    gulp.watch("./assets/*/models/**", ["buildModels"]);
    gulp.watch("./assets/*/hdris/**", ["buildHdris"]);
    gulp.watch("./assets/*.json", function () {
        console.log("Build Scene files");
        setTimeout(buildSceneFiles, 200);
    });
});