const fs = require("fs");
const { dialog } = require("electron");

const ConfigManager = {
    save: (obj_window, obj_config) => {
        return dialog.showSaveDialog(obj_window, {
            title: "Sauvegarder la configuration",
            defaultPath: "render_config.json",
            filters: [
                { name: "Configuration JSON", extensions: ["json"] },
            ],
        })
        .then((obj_result) => {
            if (obj_result.canceled || !obj_result.filePath) {
                return { is_success: false };
            }

            let str_json = JSON.stringify(obj_config, null, 4);

            return new Promise((resolve, reject) => {
                fs.writeFile(obj_result.filePath, str_json, "utf8", (obj_err) => {
                    if (obj_err) {
                        reject(new Error("Impossible de sauvegarder : " + obj_err.message));
                        return;
                    }
                    resolve({ is_success: true, str_path: obj_result.filePath });
                });
            });
        });
    },

    load: (obj_window) => {
        return dialog.showOpenDialog(obj_window, {
            title: "Charger une configuration",
            filters: [
                { name: "Configuration JSON", extensions: ["json"] },
            ],
            properties: ["openFile"],
        })
        .then((obj_result) => {
            if (obj_result.canceled || obj_result.filePaths.length === 0) {
                return null;
            }

            let str_file_path = obj_result.filePaths[0];

            return new Promise((resolve, reject) => {
                fs.readFile(str_file_path, "utf8", (obj_err, str_data) => {
                    if (obj_err) {
                        reject(new Error("Impossible de lire : " + obj_err.message));
                        return;
                    }

                    try {
                        let obj_config = JSON.parse(str_data);
                        resolve(obj_config);
                    } catch (obj_parse_err) {
                        reject(new Error("Fichier corrompu : " + obj_parse_err.message));
                    }
                });
            });
        });
    },
};

module.exports = ConfigManager;