package org.hso.ecommerce.app.config;

import java.io.*;
import java.util.ArrayList;
import java.util.List;

import org.hso.ecommerce.app.config.YAMLData.Address;
import org.springframework.stereotype.Component;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;

import javax.annotation.PostConstruct;

@Component
public class AppSettings {

	private static YAMLData data;

	private static String installationName;
	private static String companyName;
	private static Address companyAddress;
	private static int numberOfStorageSpaces;
	private static List<YAMLData.Supplier> suppliers;
	private static String parcelServiceName;
	private static String parcelServiceApiURL;

	@PostConstruct
	/**
	 * on initialization read the config and store the data in static objects
	 */
	public void init() {
		data = readConfig();

		installationName = data.getInstallationName();
		companyName = data.getCompanyName();
		companyAddress = data.getCompanyAddress();
		numberOfStorageSpaces = data.getNumberOfStorageSpaces();
		suppliers = data.getSuppliers();
		parcelServiceName = data.getParcelServiceName();
		parcelServiceApiURL = data.getParcelServiceApiURL();

		System.out.println("Initialised Settings!");
	}

	/**
	 * write a demo config file
	 */
	public void writeDemoConfig() {
		YAMLData data = new YAMLData();
		data.setInstallationName("Fast-Web-Shop");
		data.setCompanyName("newCommerce GmbH");
		data.setCompanyAddress(new Address(
				"Kupfergraben",
				"6",
				"10117",
				"Berlin",
				"Germany"
		));
		data.setNumberOfStorageSpaces(128);

		List<YAMLData.Supplier> suppliers = new ArrayList<>();
		suppliers.add(new YAMLData.Supplier(
				"Reichelt elektronik GmbH & Co. KG",
				"d41d8cd98f00b204e9800998ecf8427e",
				"https://reichelt.api.ecommerce.mosad.xyz",
				4,
				new Address(
						"Elektronikring",
						"1",
						"26452",
						"Sande",
						"Germany"
				)
		));
		suppliers.add(new YAMLData.Supplier(
				"Conrad Electronic SE",
				"18a17da5bac1cf00551b08c3e98720f5",
				"https://conrad.api.ecommerce.mosad.xyz",
				5,
				new Address(
						"Klaus-Conrad-Straße",
						"1",
						"92240",
						"Hirschau",
						"Germany"
				)
		));
		data.setSuppliers(suppliers);

		data.setParcelServiceName("DHL International GmbH");
		data.setParcelServiceApiURL("https://dhl.api.ecommerce.mosad.xyz");

		try (FileWriter writer = new FileWriter("./eCommerce_config.yml")) {
			Yaml yaml = new Yaml();
			yaml.dump(data, writer);
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	/**
	 * read a config file named "eCommerce_config.yml" from the applications root directory
	 * @return the settings as YAMLData object
	 */
	public YAMLData readConfig() {
		YAMLData data = new YAMLData();

		try (InputStream inputStream = new FileInputStream("./eCommerce_config.yml")) {
			Yaml yaml = new Yaml(new Constructor(YAMLData.class));
			data = yaml.load(inputStream);
		} catch (FileNotFoundException e) {
			System.err.println("The file \"eCommerce_config.yml\" has not been found, please create a valid Configuration file.");
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

		return data;
	}

	public static YAMLData getData() {
		return data;
	}

	public static String getInstallationName() {
		return installationName;
	}

	public static String getCompanyName() {
		return companyName;
	}

	public static Address getCompanyAddress() {
		return companyAddress;
	}

	public static int getNumberOfStorageSpaces() {
		return numberOfStorageSpaces;
	}

	public static List<YAMLData.Supplier> getSuppliers() {
		return suppliers;
	}

	public static String getParcelServiceName() {
		return parcelServiceName;
	}

	public static String getParcelServiceApiURL() {
		return parcelServiceApiURL;
	}
}