package de.umarumg;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import de.umarumg.models.Decision;
import de.umarumg.models.Scene;
import de.umarumg.models.TextSpeed;
import org.apache.commons.lang3.StringUtils;

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.Map;
import java.util.Scanner;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;
import java.util.stream.Collectors;

public class Main {

    public static Logger logger = Logger.getLogger(Logger.GLOBAL_LOGGER_NAME);
    public static Scanner scanner = new Scanner(System.in);

    private static Map<String, Scene> story;
    private static TextSpeed textSpeed = TextSpeed.NORMAL;
    private static final String finalSpeeds = Arrays.stream(TextSpeed.values())
            .map(speed -> StringUtils.capitalize(speed.name().toLowerCase()))
            .collect(Collectors.joining(", "));

    private static String currentScene = "start";
    private static String userName = "Player";

    public static void main(String[] args) {
        if (args.length > 0) {
            loadDialog(args[0], false);
        } else {
            loadDialog("dialog.json", true);
        }

        System.out.println("How fast should the text scroll?: " + finalSpeeds);
        System.out.print("> ");
        String data = scanner.nextLine().toLowerCase();

        if (data.startsWith("s")) {
            textSpeed = TextSpeed.SLOW;
        } else if (data.startsWith("n")) {
            textSpeed = TextSpeed.NORMAL;
        } else if (data.startsWith("f")) {
            textSpeed = TextSpeed.FAST;
        }

        System.out.println("What is your Name?");
        System.out.print("> ");
        String name = scanner.nextLine();
        if(!name.isEmpty()) {
            userName = name.strip().split(" ")[0];
        }

        run(currentScene);
    }

    public static void loadDialog(String fileName, boolean defaultFile) {
        try {
            ObjectMapper mapper = new ObjectMapper();
            InputStream inputStream = defaultFile ? Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName) : new FileInputStream(fileName);
            story = mapper.readValue(inputStream, new TypeReference<>() {});
        } catch (Exception ex) {
            logger.severe("Error reading the internal dialog File. Exiting now!");
            System.exit(1);
        }
    }

    public static void writeText(String text) {
        text = text.replace("%user%", userName);
        try {
            for (char c : text.toCharArray()) {
                System.out.print(c);
                TimeUnit.MILLISECONDS.sleep(textSpeed.getSpeed());
            }
        } catch (Exception ex) {
            logger.severe("Error while writing text to screen. Exiting now!");
            System.exit(1);
        }
    }

    public static void run(String key) {
        if (story != null) {
            Scene scene = story.get(key);
            for (int i = 0; i < scene.getText().size(); i++) {
                writeText(scene.getText().get(i));
                if (i == scene.getText().size() - 1) {
                    System.out.print("\n");
                    break;
                }
                scanner.nextLine();
            }

            LinkedList<Decision> decisions = scene.getDecisions();

            if (!decisions.isEmpty()) {
                int choice = 0;
                for (int i = 0; i < decisions.size(); i++) {
                    writeText(i+1 + ": " + decisions.get(i).getText() + "\n");
                }

                while (choice == 0) {
                    System.out.print("> ");
                    if (scanner.hasNextInt()) {
                        choice = Integer.parseInt(scanner.nextLine());
                        if (choice < 0 || choice > decisions.size()) {
                            choice = 0;
                        }
                    }
                }

                currentScene = decisions.get(choice-1).getScene();
                run(currentScene);
            } else {
                System.out.println("End of Story!");
            }
        }
    }
}