from gridedit import (
    cell_column,
    cell_line,
    edit,
    h_segment_column,
    wall_column_left_of,
    wall_line_above,
)

from dojo.board import Board, build_board
from dojo.grid import parse_grid
from dojo.validate import Report, validate


def validate_text(text: str) -> Report:
    return validate(build_board(parse_grid(text)))


def test_fixture_board_has_no_errors(board: Board) -> None:
    report = validate(board)

    assert report.errors == []


def test_fixture_stats(board: Board) -> None:
    stats = validate(board).stats

    assert stats is not None
    assert stats.playable_squares == 4 * (64 - 9 - 4)
    assert stats.square_counts == {
        ".": 172,
        "?": 4,
        "A": 8,
        "F": 4,
        "K": 4,
        "P": 4,
        "T": 8,
    }
    assert stats.dojo_entrances == 4
    assert stats.tunnel_pairs == 4
    assert stats.dojo_distance == (10, 10, 10, 10)


def test_tatami_share_outside_target_is_a_warning(board: Board) -> None:
    report = validate(board)

    assert any("Tatami share 84%" in w for w in report.warnings)


def test_wall_inside_dojo(quadrant_text: str) -> None:
    text = edit(quadrant_text, wall_line_above(7), h_segment_column(6), "---")

    report = validate_text(text)

    assert "wall inside the Dojo between (6, 6) and (7, 6)" in report.errors


def test_dojo_without_entrance(quadrant_text: str) -> None:
    text = edit(quadrant_text, wall_line_above(6), h_segment_column(7), "---")

    report = validate_text(text)

    assert "quadrant 0 has no Dojo entrance" in report.errors


def test_safe_room_with_one_exit(quadrant_text: str) -> None:
    text = edit(quadrant_text, cell_line(1), wall_column_left_of(3), "|")

    report = validate_text(text)

    assert "Safe Room of quadrant 0: 1 exits, rules require 2" in report.errors


def test_safe_room_exits_on_the_same_side(quadrant_text: str) -> None:
    text = edit(quadrant_text, cell_line(1), wall_column_left_of(3), "|")
    text = edit(text, cell_line(0), wall_column_left_of(3), " ")
    text = edit(text, wall_line_above(3), h_segment_column(1), "---")
    text = edit(text, cell_line(2), wall_column_left_of(3), " ")

    report = validate_text(text)

    assert "Safe Room of quadrant 0: both exits face E" in report.errors


def test_safe_room_used_as_a_shortcut(quadrant_text: str) -> None:
    text = edit(quadrant_text, cell_line(3), wall_column_left_of(2), "|")

    report = validate_text(text)

    assert any("Safe Room of quadrant 0: is a shortcut, 4 steps" in e for e in report.errors)


def test_safe_room_must_contain_the_corner(quadrant_text: str) -> None:
    text = edit(quadrant_text, cell_line(0), cell_column(0), ".")

    report = validate_text(text)

    assert "Safe Room of quadrant 0: does not contain the board corner (0, 0)" in report.errors
    assert "Safe Room of quadrant 0: 8 cells, rules expect 9" in report.warnings


def test_enclosed_square_is_unreachable(quadrant_text: str) -> None:
    text = edit(quadrant_text, wall_line_above(4), h_segment_column(5), "---")
    text = edit(text, wall_line_above(5), h_segment_column(5), "---")
    text = edit(text, cell_line(4), wall_column_left_of(5), "|")
    text = edit(text, cell_line(4), wall_column_left_of(6), "|")

    report = validate_text(text)

    assert any(
        e.startswith("4 squares cannot be walked to from the Safe Room of quadrant 0: (4, 5)")
        for e in report.errors
    )