from abc import ABC, abstractmethod


from source.classes.maze import Maze
from source.classes.cell import Cell

class MazeBuilder(ABC):
    @abstractmethod
    def buildFromFile(self, filename: str) -> Maze:
        pass


class TextFileMazeBuilder(MazeBuilder):
    def buildFromFile(self, filename: str) -> Maze:
        """Получает лабиринт из текстового файла"""
        with open(filename) as f:
            data = f.read().splitlines()
            x, y = 0, 0
            width = len(data[0])
            height = len(data)

            cells = [[None] * width for _ in range(height)]

            start, c_exit = None, None

            for line in data:
                x = 0

                for c in line.strip():
                    if c == 'S':
                        cells[y][x] = Cell(x, y, isStart=True)
                        start = cells[y][x]
                        x += 1
                    elif c == 'E':
                        cells[y][x] = Cell(x, y, isExit=True)
                        c_exit = cells[y][x]
                        x += 1
                    elif c == '#':
                        cells[y][x] = Cell(x, y, isWall=True)
                        x += 1
                    elif c == ' ':
                        cells[y][x] = Cell(x, y)
                        x += 1
                    else:
                        print(f'Обнаружен неизвестный символ({c}) в файле лабиринта\nfilename: {filename}\nОн заменён на стену')
                        cells[y][x] = Cell(x, y, isWall=True)
                        x += 1
                
                y += 1

            if start == None:
                raise ValueError(f'В файле лабиринта не обнаружен вход!\nfilename: {filename}')

            if c_exit == None:
                raise ValueError(f'В файле лабиринта не обнаружен выход!\nfilename: {filename}')
                        
            return Maze(
                cells=cells,
                width=width,
                height=height,
                start=start,
                exit=c_exit
            )