using Game.Data;
using Game.UI;

namespace Game {
    internal class Program {
        static int Main(string[] args) {
            CommandLineOptions opts = CommandLineOptions.Parse(args);

            TextDisplay display = new TextDisplay();
            if (!display.InitWindow()) {
                return 1;
            }
            display.PrintSimpleWelcome();
            Thread.Sleep(1200);
            display.ShowSplash();
            Thread.Sleep(2500);

            GameConfig gameConfig;
            try {
                GameConfig? existingGameConfig = GameFiles.ReadGameConfig();
                if (existingGameConfig == null) {
                    gameConfig = GameFiles.CreateDefaultGameConfig();
                } else {
                    gameConfig = existingGameConfig;
                }
            } catch {
                display.ShowFatalError(I18n.GetMessage(I18n.Message.ERROR_READ_CONFIG_UNKNOWN));
                Console.ReadKey();
                return 2;
            }

            string databaseFileName = opts.databaseFilename ?? gameConfig.databasePath;
            Database questionDatabase;
            try {
                questionDatabase = Database.ReadFromFile(databaseFileName);
            } catch (DatabaseReadException e) {
                display.ShowFatalError(string.Format(I18n.GetMessage(I18n.Message.SYNTAX_ERROR), I18n.GetMessage(e.messageId), e.line.ToString(), e.column.ToString()));
                Console.ReadKey();
                return 3;
            }

            display.ShowMainGameScreenBase();
            display.DrawRules();
            Console.ReadKey();

            Random rng = new Random();
            List<Question> questions = questionDatabase.questions.OrderBy(_ => rng.Next()).ToList();
            int correntAnswers = 0;
            for (int i = 0; i < questions.Count; ++i) {
                Question question = questions[i];
                display.ShowMainGameScreenBase();
                display.DrawText(TextDisplay.HAlignment.Center, TextDisplay.VAlignment.Center, 6, display.windowWidth / 2 + 1, question.question, 0, 0x5e61ed);
                int x1 = display.windowWidth / 4;
                int x2 = display.windowWidth * 3 / 4;
                int y1 = display.windowHeight * 2 / 5;
                int y2 = Math.Min(y1 + 4, display.windowHeight - 2);
                int selectedAnswer = 0;
                bool redraw = true;
                while (true) {
                    display.DrawTextBox(TextDisplay.HAlignment.Center, TextDisplay.VAlignment.Center, TextDisplay.BoxType.Simple, y1, x1, question.answers[0], selectedAnswer != 0 ? 0xffffff : 0x1a03a0, selectedAnswer != 0 ? 0xffffff : 0x1a03a0, selectedAnswer != 0 ? 0x1a03a0 : 0xffffff);
                    if (question.answers.Count >= 2)
                        display.DrawTextBox(TextDisplay.HAlignment.Center, TextDisplay.VAlignment.Center, TextDisplay.BoxType.Simple, y1, x2, question.answers[1], selectedAnswer != 1 ? 0xffffff : 0x1a03a0, selectedAnswer != 1 ? 0xffffff : 0x1a03a0, selectedAnswer != 1 ? 0x1a03a0 : 0xffffff);
                    if (question.answers.Count >= 3)
                        display.DrawTextBox(TextDisplay.HAlignment.Center, TextDisplay.VAlignment.Center, TextDisplay.BoxType.Simple, y2, x1, question.answers[2], selectedAnswer != 2 ? 0xffffff : 0x1a03a0, selectedAnswer != 2 ? 0xffffff : 0x1a03a0, selectedAnswer != 2 ? 0x1a03a0 : 0xffffff);
                    if (question.answers.Count >= 4) 
                        display.DrawTextBox(TextDisplay.HAlignment.Center, TextDisplay.VAlignment.Center, TextDisplay.BoxType.Simple, y2, x2, question.answers[3], selectedAnswer != 3 ? 0xffffff : 0x1a03a0, selectedAnswer != 3 ? 0xffffff : 0x1a03a0, selectedAnswer != 3 ? 0x1a03a0 : 0xffffff);

                    bool end = false;
                    while (true) {
                        var key = Console.ReadKey(true);
                        if (key.Key == ConsoleKey.UpArrow) {
                            if (selectedAnswer == 2 || selectedAnswer == 3) {
                                redraw = true;
                                selectedAnswer -= 2;
                                break;
                            }
                        } else if (key.Key == ConsoleKey.DownArrow) {
                            if (selectedAnswer == 0 || selectedAnswer == 1) {
                                redraw = true;
                                selectedAnswer += 2;
                                break;
                            }
                        } else if (key.Key == ConsoleKey.RightArrow) {
                            if (selectedAnswer == 0 || selectedAnswer == 2) {
                                redraw = true;
                                selectedAnswer += 1;
                                break;
                            }
                        } else if (key.Key == ConsoleKey.LeftArrow) {
                            if (selectedAnswer == 1 || selectedAnswer == 3) {
                                redraw = true;
                                selectedAnswer -= 1;
                                break;
                            }
                        } else if (key.Key == ConsoleKey.Enter) {
                            end = true;
                            break;
                        }
                    }
                    if (end) {
                        if (selectedAnswer == question.correctAnswer) {
                            correntAnswers++;
                        }
                        break;
                    }
                }
            }
            display.ShowMainGameScreenBase();
            display.DrawText(TextDisplay.HAlignment.Center, TextDisplay.VAlignment.Center, display.windowHeight / 4, display.windowWidth / 2 + 1, String.Format(I18n.GetMessage(I18n.Message.GAME_OVER), correntAnswers, questions.Count), 0xffffff, 0x5e61ed);

            display.SetCursor(display.windowHeight / 2 + 1, display.windowWidth / 4);
            display.WriteColored(I18n.GetMessage(I18n.Message.ENTER_NAME), 0,  0x5e61ed);
            Leaderboard.WriteScore(Console.ReadLine().Replace('\t', '_').Replace(' ', '_'), correntAnswers);

            display.ResetWindow();

            return 0;
        }
    }
}