import shutil
from subprocess import PIPE, Popen
from typing import List, Optional, TextIO

import pytest

from . import data_stream


def _exec(
    args: List[str],
    outputtext: List[str],
    returncode: int = 0,
    stdin: Optional[TextIO] = None,
) -> None:
    if not stdin:
        stdin = data_stream("cap.fa")
    args = ["weblogo"] + args
    p = Popen(args, stdin=stdin, stdout=PIPE, stderr=PIPE)
    (out, err) = p.communicate()
    if returncode == 0 and p.returncode > 0:
        print(err)
    assert returncode == p.returncode
    if returncode == 0:
        assert len(err) == 0

    if outputtext:
        outs = out.decode()
        for item in outputtext:
            assert item in outs

    stdin.close()


def test_malformed_options() -> None:
    _exec(["--notarealoption"], [], 2)
    _exec(["extrajunk"], [], 2)
    _exec(["-I"], [], 2)


def test_help_option() -> None:
    _exec(["-h"], ["options"])
    _exec(["--help"], ["options"])


# def test_version_option():
#     _exec(['--version'], weblogo.__version__[0:5])


def test_default_build() -> None:
    _exec([], ["%%Title:        Sequence Logo:"])


# Format options
def test_width() -> None:
    _exec(["-W", "1234"], ["/stack_width         1234"])
    _exec(["--stack-width", "1234"], ["/stack_width         1234"])


def test_height() -> None:
    _exec(["-W", "1000"], ["/stack_height        5000"])
    _exec(["-W", "1000", "--aspect-ratio", "2"], ["/stack_height        2000"])


def test_stacks_per_line() -> None:
    _exec(["-n", "7"], ["/stacks_per_line     7 def"])
    _exec(["--stacks-per-line", "7"], ["/stacks_per_line     7 def"])


def test_title() -> None:
    _exec(
        ["-t", "3456"],
        ["/logo_title         (3456) def", "/show_title         True def"],
    )
    _exec(["-t", ""], ["/logo_title         () def", "/show_title         False def"])
    _exec(
        ["--title", "3456"],
        ["/logo_title         (3456) def", "/show_title         True def"],
    )


def test_annotate() -> None:
    _exec(["--annotate", "1,2,3,4"], [], 2)
    _exec(["--annotate", "1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,,"], [])


def test_color() -> None:
    _exec(["--color", "black", "AG", "Purine"], [])
    _exec(["--color", "not_a_color", "AG", "Purine"], [], 2)


def test_reverse_complement() -> None:
    _exec(["--complement"], [])
    _exec(["--reverse"], [])
    _exec(["--revcomp"], [])


def test_formats() -> None:
    _exec(["--format", "eps"], [])
    _exec(["--format", "png"], [])
    _exec(["--format", "png_print"], [])
    _exec(["--format", "pdf"], [])
    _exec(["--format", "jpeg"], [])

    _exec(["--format", "logodata"], [])
    _exec(["--format", "csv"], [])


@pytest.mark.skipif(shutil.which("pdf2svg") is None, reason="requires pdf2svg")
def test_formats_svg() -> None:
    _exec(["--format", "svg"], [])