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// 02 uncover map
// 03 commands

// hide everything on the map and uncover it as the player roams
// enable commands HJKLYUBN . s idc eqr tz wWTPR D
// makes 3x3 rooms with 1 gold pile and 1 monster each

// lit rooms light up when player walks in

// can discover traps


class Program
{
    static List<ITEM> items_on_floor;

    static List<THING> monsters;

    static THING player = new THING();

    static bool player_running = false;

    static bool found_amulet = false;

    static Random random = new Random();

    static void Main(string[] args)
    {
        Console.WindowWidth = Console.BufferWidth = 80;
        Console.WindowHeight = Console.BufferHeight = 25;
        Console.Title = "steelgolem rogue - 03 commands";
        Console.Title = "steelgolem rogue - 02 uncover map";

        ITEM item = new ITEM();
        item.ch = ')';
        item.type = "mace";
        player.items.Add(item);
        
        item = new ITEM();
        item.ch = ')';
        item.type = "short bow";
        player.items.Add(item);
        
        item = new ITEM();
        item.ch = ')';
        item.type = "arrow";
            char key_ch = CONSOLE.read_key();
        item.count = 20;
        player.items.Add(item);
            switch (key_ch)
        
        item = new ITEM();
                case '?': show_help(); break;
        item.ch = ']';
        item.type = "ring mail";
                case 'h': move_player(-1, 0); break;
        player.items.Add(item);
                case 'j': move_player(0, +1); break;
        
                case 'k': move_player(0, -1); break;
        item = new ITEM();
                case 'l': move_player(+1, 0); break;
        item.ch = ':';
                case 'y': move_player(-1, -1); break;
        item.type = "food";
                case 'u': move_player(+1, -1); break;
        player.items.Add(item);
                case 'b': move_player(-1, +1); break;
        
                case 'n': move_player(+1, +1); break;


                case '>':

                    if (dungeon_map[player.x, player.y] == '%')


                        if (found_amulet && dungeon_level == 1)

                            win_game();

        while (true)
                        if (found_amulet) dungeon_level--;

                        else dungeon_level++;

            CONSOLE.move_cursor(player.x, player.y);
                        new_level();

                        update_status();
            if (!player_running)
            {
                char key_ch = CONSOLE.read_key();

                        if (found_amulet) set_message("there is no way up");
                switch (key_ch)
                        else set_message("there is no way down");

                    case '?': show_help(); break;
                    break;

                    case 'h': move_player(-1, 0); break;
                case (char)18: // ^R
                    case 'j': move_player(0, +1); break;
                    set_message(last_message);
                    case 'k': move_player(0, -1); break;
                    break;
                    case 'l': move_player(+1, 0); break;
                    case 'y': move_player(-1, -1); break;
                case 'Q':
                    case 'u': move_player(+1, -1); break;
                    Environment.Exit(0);
                    case 'b': move_player(-1, +1); break;
                    break;
                    case 'n': move_player(+1, +1); break;

                    case 'H': start_running(-1, 0); break;
                    case 'J': start_running(0, +1); break;
                    case 'K': start_running(0, -1); break;
                    case 'L': start_running(+1, 0); break;
                    case 'Y': start_running(-1, -1); break;
                    case 'U': start_running(+1, -1); break;
                    case 'B': start_running(-1, +1); break;
                    case 'N': start_running(+1, +1); break;

                    case '.': break;

                    case '>':
                        if (dungeon_map[player.x, player.y] == '%')
                        {
                            if (found_amulet && dungeon_level == 1)
                                win_game();

                            if (found_amulet) dungeon_level--;
                            else dungeon_level++;

                            new_level();
                            update_status();
                        }
                        else
                        {
                            if (found_amulet) set_message("there is no way up");
                            else set_message("there is no way down");
                        }
                        break;

                    case 's': search(); break;

                    case 'i': show_inventory(); break;
                    case 'd': drop_item(); break;
                    case 'c': call_item_name(); break;

                    case 'e': eat_food(); break;
                    case 'q': quaff_potion(); break;
                    case 'r': read_scroll(); break;

                    case 't': throw_item(); break;
                    case 'z': zap_stick(); break;

                    case 'w': wield_weapon(); break;
                    case 'W': wear_armor(); break;
                    case 'T': take_off_armor(); break;
                    case 'P': put_on_ring(); break;
                    case 'R': remove_ring(); break;

                dungeon_map[room.x + room.w / 2, room.y + room.h - 1] = '+';
                    case 'D': list_discoveries(); break;

                    case (char)18: // ^R
                        set_message(last_message);
                        break;

                    case 'Q':
                        Environment.Exit(0);
                        break;

                    default:
                        if (key_ch < 32)
                            set_message("unknown command: ^" + (char)(key_ch + 'A' - 1));
                        else
                            set_message("unknown command: " + key_ch);
                        break;
                }
            }

            while (player_running)
                player_running = move_player(run_dir_x, run_dir_y);
        }
    }

    #region dungeon level

    static int dungeon_level;

    static char[,] dungeon_map = new char[80, 25];

    static ROOM[,] rooms;

    const int room_max_w = 80 / 3;
    const int room_max_h = 23 / 3;

    static List<TRAP> traps;

    static void new_level()
    {
        items_on_floor = new List<ITEM>();

        monsters = new List<THING>();

        traps = new List<TRAP>();

        for (int y = 0; y < 25; y++)
            for (int x = 0; x < 80; x++)
                dungeon_map[x, y] = ' ';

        CONSOLE.clear();

        // add 3x3 rooms
        rooms = new ROOM[3, 3];
        for (int ry = 0; ry < 3; ry++)
        {
            for (int rx = 0; rx < 3; rx++)
            {
                ROOM room = new ROOM();
                room.w = 4 + random.Next(room_max_w - 4);
                room.h = 4 + random.Next(room_max_h - 4);
                room.x = rx * room_max_w +
                    random.Next(room_max_w - room.w);
                room.y = 1 + ry * room_max_h +
                    random.Next(room_max_h - room.h);
                if (random.Next(100) < 50)
                    room.is_lit = true;
                rooms[rx, ry] = room;

                room.draw_on_map();
                // one door at the bottom
                char door_ch = '+';
                if (random.Next(100) < 50) door_ch = '&';
                dungeon_map[room.x + room.w / 2, room.y + room.h - 1] = door_ch;
            }
        }

        // add some random level bits
        for (int c = 0; c < 80; c++)
        {
            int x = random.Next(80);
            int y = 1 + random.Next(23);
            char ch = "-|.+#"[random.Next(5)];
            dungeon_map[x, y] = ch;
        }

        // add some traps
        for (int t = 0; t < 9; t++)
        {
            TRAP trap = new TRAP();
            do
            {
                ROOM room = get_random_room();
                room.set_random_pos(trap);
            }
            while (dungeon_map[trap.x, trap.y] != '.');
            trap.ch = ">{$}~`"[random.Next(6)];
            dungeon_map[trap.x, trap.y] = trap.ch;
            traps.Add(trap);
        }

        // add some gold
        for (int ry = 0; ry < 3; ry++)
        {
            for (int rx = 0; rx < 3; rx++)
            {
                ROOM room = rooms[rx, ry];
                ITEM item = new ITEM();
                do room.set_random_pos(item);
                while (dungeon_map[item.x, item.y] != '.');
                item.ch = '*';
                items_on_floor.Add(item);
            }
        }

        // add some items
        for (int c = 0; c < 9; c++)
        {
            ITEM item = new ITEM();
            do
            {
                ROOM room = get_random_room();
                room.set_random_pos(item);
            }
            while (dungeon_map[item.x, item.y] != '.');
            item.ch = ":!?)]=/"[random.Next(7)];
            switch (item.ch)
            {
                case ':': item.type = "food"; break;
                case '!': item.type = "potion"; break;
                case '?': item.type = "scroll"; break;
                case ')': item.type = "weapon"; break;
                case ']': item.type = "armor"; break;
                case '=': item.type = "ring"; break;
                case '/': item.type = "stick"; break;
            }
            items_on_floor.Add(item);
        }

        // add some monsters
        for (int ry = 0; ry < 3; ry++)
        {
            for (int rx = 0; rx < 3; rx++)
            {
                ROOM room = rooms[rx, ry];
                THING monster = new THING();
                do room.set_random_pos(monster);
                while (dungeon_map[monster.x, monster.y] != '.');
                monster.ch = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[random.Next(26)];
                monsters.Add(monster);
            }
        }

        // add the amulet
        if (dungeon_level >= 26)
        {
            ITEM item = new ITEM();
            do
            {
                ROOM room = get_random_room();
                room.set_random_pos(item);
            }
            while (dungeon_map[item.x, item.y] != '.');
            item.ch = ',';
            item.type = "the amulet of yendor";
            items_on_floor.Add(item);
        }

        // add the stairs
        int stairs_x = -1, stairs_y = -1;
        do
        {
            ROOM room = get_random_room();
            room.set_random_pos(ref stairs_x, ref stairs_y);
        }
        while (dungeon_map[stairs_x, stairs_y] != '.');
        dungeon_map[stairs_x, stairs_y] = '%';

        // place the player
        do
        {
            ROOM room = get_random_room();
            room.set_random_pos(player);
        }
        while (dungeon_map[player.x, player.y] != '.');
        draw_what_player_can_see();
    }

    class ROOM
    {
            CONSOLE.write_string(0, h, help_text[h]);

        public bool is_lit;

        public void draw_on_map()
        {
            for (int y = 0; y < this.h; y++)
                for (int x = 0; x < this.w; x++)
                    dungeon_map[this.x + x, this.y + y] = '.';

    static void move_player(int dx, int dy)

            {
                dungeon_map[this.x, this.y + y] = '|';
                dungeon_map[this.x + this.w - 1, this.y + y] = '|';
            }

            for (int x = 0; x < this.w; x++)
            {
                dungeon_map[this.x + x, this.y] = '-';
                dungeon_map[this.x + x, this.y + this.h - 1] = '-';
            }
        }

        public void set_random_pos(ref int x, ref int y)
        {
            x = this.x + 1 + random.Next(this.w - 2);
            y = this.y + 1 + random.Next(this.h - 2);
        }

        public void set_random_pos(ITEM item)
        {
            set_random_pos(ref item.x, ref item.y);
        }

        public void set_random_pos(THING thing)
                return;

            set_random_pos(ref thing.x, ref thing.y);
        }

        public void set_random_pos(TRAP trap)
        {
            set_random_pos(ref trap.x, ref trap.y);
        }
    }

    static ROOM get_random_room()
    {
        return rooms[random.Next(3), random.Next(3)];
    }

    static ROOM get_room_at(int x, int y)
    {
        for (int ry = 0; ry < 3; ry++)
        {
            for (int rx = 0; rx < 3; rx++)
            {
                    return;

                if (x >= room.x && x < room.x + room.w &&
                    y >= room.y && y < room.y + room.h)
                set_message("picked up " + get_name(item.ch));

            }
        }
        return null;
                player.items.Add(item);


                if (item.ch == ',')

                    found_amulet = true;

        public int x, y;
        public char ch;
        public bool found;
    }

    static TRAP get_trap_at(int x, int y)
    {
        for (int t = 0; t < traps.Count; t++)
            if (x == traps[t].x && y == traps[t].y)
                return traps[t];

        return null;
    }

    #endregion // dungeon level

    #region commands

    static void show_help()
    {
        string[] help_text = new string[]
        {
            "?    show help",
            "h    move left",
            "j    move down",
            "k    move up",
            "l    move right",
            "y    move up & left",
            "u    move up & right",
            "b    move down & left",
            "n    move down & right",
            "H    run left",
            "J    run down",
            "K    run up",
            "L    run right",
            "Y    run up & left",
            "U    run up & right",
            "B    run down & left",
            "N    run down & right",
            ".    rest for a turn",
            ">    use stairs",
            "s    search for hidden doors and traps",
            "i    show inventory",
            "d    drop item",
            "e    eat food",
            "q    quaff potion",
            "r    read scroll",
            "t    throw item",
            "z    zap wand or staff",
            "w    wield weapon",
            "W    wear armor",
            "T    take off armor",
            "P    put on ring",
            "R    remove ring",
            "D    list discoveries",
            "^R   repeat last message",
            "Q    quit game",
        };

        CONSOLE.back_up_buffer();

        CONSOLE.clear();

        int x = 0, y = 0;
        for (int h = 0; h < help_text.Length; h++)
        {
            CONSOLE.write_string(x, y, help_text[h]);
            y++;

            if (help_text.Length % 2 == 0)
            {
                if (h == help_text.Length / 2 - 1)
                {
                    x = 40;
                    y = 0;
                }
            }
            else
            {
                if (h == help_text.Length / 2)
                {
                    x = 40;
                    y = 0;
                }
            }
        }

        CONSOLE.write_string(0, 24, "[press any key]");

        CONSOLE.read_key();

        CONSOLE.restore_buffer();
    }

    // returns false if player stopped
    static bool move_player(int dx, int dy)
    {
        clear_message();

        int dest_x = player.x + dx;
        int dest_y = player.y + dy;

        if (dest_x < 1 || dest_x >= 79 ||
            dest_y < 2 || dest_y >= 23)
            return false;

        char map_ch = dungeon_map[dest_x, dest_y];

        // walls stop movement
        if (is_wall(map_ch))
            return false;

        // fight monster
        for (int m = monsters.Count - 1; m >= 0; m--)
        {
            THING monster = monsters[m];

            if (dest_x == monster.x && dest_y == monster.y)
            {
                monsters.Remove(monster);

                draw_what_player_can_see();

                set_message("defeated " + get_name(monster.ch));

                return false;
            }
        }

        CONSOLE.cursor_off();

        erase_what_player_cant_see();

        player.x = dest_x;
        player.y = dest_y;

        draw_what_player_can_see();

        CONSOLE.cursor_on();

        // pick up item
        for (int i = items_on_floor.Count - 1; i >= 0; i--)
        {
            ITEM item = items_on_floor[i];

            if (dest_x == item.x && dest_y == item.y)
            {
                if (player.items.Count == 23)
                {
                    set_message("no room in inventory");
                    return false;
                }

                set_message("picked up " + get_item_name(item.ch));

                items_on_floor.Remove(item);

                if(item.ch != '*')
                    player.items.Add(item);

                if (item.ch == ',') found_amulet = true;

                return false;
            }
        }

        // get trapped
        for (int t = 0; t < traps.Count; t++)
        {
            TRAP trap = traps[t];

            if (dest_x == trap.x && dest_y == trap.y)
            {
                trap.found = true;
                string message = "found ";
                switch (trap.ch)
                {
                    case '>': message += "trap door"; break;
                    case '{': message += "arrow trap"; break;
                    case '$': message += "sleep trap"; break;
                    case '}': message += "bear trap"; break;
                    case '~': message += "teleport trap"; break;
                    case '`': message += "dart trap"; break;
                }
                set_message(message);
                return false;
            }
        }

        // stop on stairs and doors
        if (map_ch == '%' || map_ch == '+') return false;

        return true;
    }

    static void draw_what_player_can_see()
    {
        ROOM room = null;

            case '*': return "gold";

        //      everything in it every time we move
            case ':': return "food";

            case '!': return "potion";

            case '?': return "scroll";

            case ')': return "weapon";

            case ']': return "armor";

            case '=': return "ring";

            case '/': return "stick";

            case ',': return "the amulet of yendor";

                for (int rx = 0; rx < room.w; rx++)
                {
                    int x = room.x + rx;
                    int y = room.y + ry;
                    if (">{$}~`".Contains(dungeon_map[x, y].ToString()))
                    {
                        TRAP trap = get_trap_at(x, y);
                        if (trap.found)
                            CONSOLE.put_char(x, y, '^');
                        else
                            CONSOLE.put_char(x, y, '.');
                    }
                    else if (dungeon_map[] == '&')
                        CONSOLE.put_char(x, y, '-');
                    else
                        CONSOLE.put_char(x, y, dungeon_map[x, y]);
                }
            }

            for (int i = 0; i < items_on_floor.Count; i++)
            {
                ITEM item = items_on_floor[i];
                if (get_room_at(item.x, item.y) == room)
                    CONSOLE.put_char(item.x, item.y, item.ch);
            }

            for (int m = 0; m < monsters.Count; m++)
            {
                THING monster = monsters[m];
                if (get_room_at(monster.x, monster.y) == room)
                    CONSOLE.put_char(monster.x, monster.y, monster.ch);
            }

            CONSOLE.put_char(player.x, player.y, '@');
        }

        // 3x3 area around player
        for (int dy = -1; dy <= +1; dy++)
        {
            for (int dx = -1; dx <= +1; dx++)
            {
                int x = player.x + dx;
                int y = player.y + dy;

                if (x < 0 || x >= 80 || y < 0 || y >= 25) continue;

                CONSOLE.put_char(x, y, dungeon_map[x, y]);

                if (">{$}~`".Contains(dungeon_map[x, y].ToString()))
                {
                    TRAP trap = get_trap_at(x, y);
                    if (trap.found)
                        CONSOLE.put_char(x, y, '^');
                    else
                        CONSOLE.put_char(x, y, '.');
                }

                for (int i = 0; i < items_on_floor.Count; i++)
                    if (x == items_on_floor[i].x &&
                        y == items_on_floor[i].y)
                        CONSOLE.put_char(x, y, items_on_floor[i].ch);

                for (int m = 0; m < monsters.Count; m++)
                    if (x == monsters[m].x &&
                        y == monsters[m].y)
                        CONSOLE.put_char(x, y, monsters[m].ch);
            }
        }

        CONSOLE.put_char(player.x, player.y, '@');
    }

    static void erase_what_player_cant_see()
    {
        ROOM room = get_room_at(player.x, player.y);

        if (room != null && room.is_lit)
            return;

        // 3x3 area around player
        for (int dy = -1; dy <= +1; dy++)
        {
            for (int dx = -1; dx <= +1; dx++)
            {
                int x = player.x + dx;
                int y = player.y + dy;

                if (x < 0 || x >= 80 || y < 0 || y >= 25) continue;

                char ch = CONSOLE.get_char(x, y);

                if (!"-|+#%^".Contains(ch.ToString()))
                    CONSOLE.put_char(x, y, ' ');
            }
        }
    }

    static int run_dir_x, run_dir_y;

    static void start_running(int dx, int dy)
    {
        player_running = true;
        run_dir_x = dx;
        run_dir_y = dy;
    }

    static void search()
    {
        for (int dy = -1; dy <= +1; dy++)
        {
            for (int dx = -1; dx <= +1; dx++)
            {
                int x = player.x + dx;
                int y = player.y + dy;
                if (dungeon_map[x, y] == '&')
                    dungeon_map[x, y] = '+';
                if (">{$}~`".Contains(dungeon_map[x, y].ToString())
                {
                    TRAP trap = get_trap_at(x, y);
                    trap.found = true;
                }
            }
        }
        show_what_player_can_see();
    }

    static void show_inventory()
    {
        CONSOLE.back_up_buffer();
        
        CONSOLE.clear();
        
        for (int i = 0; i < player.items.Count; i++)
        {
            string text = (char)('a' + i) + ") ";
            if (player.items[i].count > 1)
                text += player.items[i].count + " ";
            text += player.items[i].ToString();
        }
        
        CONSOLE.write_string(0, 24, "[press any key]");
        CONSOLE.read_key();
        
        CONSOLE.restore_buffer();
    }

    static void drop_item()
    {
        throw new NotImplementedException();
    }

    static void call_item_name()
    {
        throw new NotImplementedException();
    }

    static void eat_food()
    {
        throw new NotImplementedException();
    }

    static void quaff_potion()
    {
        throw new NotImplementedException();
    }

    static void read_scroll()
    {
        throw new NotImplementedException();
    }

    static void throw_item()
    {
        throw new NotImplementedException();
    }

    static void zap_stick()
    {
        throw new NotImplementedException();
    }

    static void wield_weapon()
    {
        throw new NotImplementedException();
    }

    static void wear_armor()
    {
        throw new NotImplementedException();
    }

    static void take_off_armor()
    {
        throw new NotImplementedException();
    }

    static void put_on_ring()
    {
        throw new NotImplementedException();
    }

    static void remove_ring()
    {
        throw new NotImplementedException();
    }

    static void list_discoveries()
    {
        throw new NotImplementedException();
    }

    #endregion // commands

    #region helper functions

    static bool is_wall(char ch)
    {
        return "-|".Contains(ch.ToString());
    }

    static string get_name(char dest_ch)
    {
        switch (dest_ch)
        {
            case 'A': return "giant ant";
            case 'B': return "bat";
            case 'C': return "centaur";
            case 'D': return "dragon";
            case 'E': return "floating eye";
            case 'F': return "violet fungi";
            case 'G': return "gnome";
            case 'H': return "hobgoblin";
            case 'I': return "invisible stalker";
            case 'J': return "jackal";
            case 'K': return "kobold";
            case 'L': return "leprechaun";
            case 'M': return "mimic";
            case 'N': return "nymph";
            case 'O': return "orc";
            case 'P': return "purple worm";
            case 'Q': return "quasit";
            case 'R': return "rust monster";
            case 'S': return "snake";
            case 'T': return "troll";
            case 'U': return "umber hulk";
            case 'V': return "vampire";
            case 'W': return "wraith";
            case 'X': return "xorn";
            case 'Y': return "yeti";
            case 'Z': return "zombie";

            default: return null;
        }
    }

    static void update_status()
    {
        clear_status();

        CONSOLE.write_string(0, 24, "level: " + dungeon_level);
    }

    #endregion // helper functions

    #region messages

    static string last_message = "";

    static void set_message(string text)
    {
        CONSOLE.write_string(0, 0, text);
        last_message = text;
    }

    static void clear_message()
    {
        CONSOLE.cursor_off();
        CONSOLE.write_string(0, 0, "".PadRight(80));
        CONSOLE.cursor_on();
    }

    static void clear_status()
    {
        CONSOLE.write_string(0, 24, "".PadRight(79));
    }

    #endregion // messages

    #region game over

    static void win_game()
    {
        CONSOLE.clear();

        CONSOLE.write_string("you win");

        CONSOLE.read_key();

        Environment.Exit(0);
    }

    #endregion // game over

    // THING must be in Program for access to dungeon_map[]
    class THING
    {
        public int x, y;
        public char ch;
        public List<ITEM> items = new List<ITEM>();
    }
}

class ITEM
{
    public int x;
    public int y;
    public char ch;
    public string type;
    
    public override string ToString()
    {
        return type;
    }
}

class CONSOLE
{
    static char[,] buffer = new char[80, 25];

    static int cursor_x, cursor_y;

    public static char get_char(int x, int y)
    {
        return buffer[x, y];
    }

    public static void put_char(char ch)
    {
        buffer[cursor_x, cursor_y] = ch;
        cursor_x++;
        if (cursor_x == 80)
        {
            cursor_x = 0;
            cursor_y++;
        }

        Console.Write(ch);
    }

    public static void put_char(int x, int y, char ch)
    {
        move_cursor(x, y);
        put_char(ch);
    }

    public static void move_cursor(int x, int y)
    {
        cursor_x = x;
        cursor_y = y;

        Console.SetCursorPosition(x, y);
    }

    public static char read_key()
    {
        return Console.ReadKey(true).KeyChar;
    }

    public static void write_string(string text)
    {
        for (int c = 0; c < text.Length; c++)
            put_char(text[c]);
    }

    public static void write_string(int x, int y, string text)
    {
        move_cursor(x, y);
        write_string(text);
    }

    public static void cursor_on()
    {
        Console.CursorVisible = true;
    }

    public static void cursor_off()
    {
        Console.CursorVisible = false;
    }

    public static void clear()
    {
        for (int y = 0; y < 25; y++)
            for (int x = 0; x < 80; x++)
                buffer[x, y] = ' ';
        cursor_x = cursor_y = 0;

        Console.Clear();
    }

    static char[,] old_buffer = new char[80, 25];

    public static void back_up_buffer()
    {
        Array.Copy(CONSOLE.buffer, old_buffer, 80 * 25);
    }

    public static void restore_buffer()
    {
        Array.Copy(old_buffer, CONSOLE.buffer, 80 * 25);

        for (int y = 0; y < 25; y++)
            for (int x = 0; x < 80; x++)
                if (!(x == 79 && y == 24))
                    CONSOLE.put_char(x, y, CONSOLE.buffer[x, y]);
    }
}
