#!/usr/bin/env python
from .term_manager import TermManager


def proof_of_concept() -> None:
    matrix = []
    with open("example_map.txt") as f:
        for line in f.readlines():
            matrix.append(line[:-1])

    with TermManager() as term_manager:
        stdscr = term_manager.screen

        for y in range(len(matrix)):
            for x in range(len(matrix[0])):
                stdscr.addstr(y, x, matrix[y][x])
        stdscr.refresh()

        cur = [1, 6]    # (y,x)
        stdscr.addstr(1, 6, '@')
        stdscr.refresh()

        while True:
            key = stdscr.getkey()
            stdscr.addstr(cur[0], cur[1], '.')
            if key == 'z':
                if cur[0] > 0 and matrix[cur[0] - 1][cur[1]] != '#':
                    cur[0] = cur[0] - 1
            if key == 's':
                if cur[0] < len(matrix) - 1 and \
                        matrix[cur[0] + 1][cur[1]] != '#':
                    cur[0] = cur[0] + 1
            if key == 'q':
                if cur[1] > 0 and matrix[cur[0]][cur[1] - 1] != '#':
                    cur[1] = cur[1] - 1
            if key == 'd':
                if cur[1] < len(matrix[0]) and \
                        matrix[cur[0]][cur[1] + 1] != '#':
                    cur[1] = cur[1] + 1
            stdscr.addstr(cur[0], cur[1], '@')