#!/usr/bin/env python
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__doc__ = """
Contains tests for the sdiff module.
"""

import json
import os
import subprocess
import tempfile
import pytest

import pyseq
from conftest import get_installed_command
from pyseq.sdiff import diff_sequences

sdiff_bin = get_installed_command("sdiff")


@pytest.fixture
def diff_test_sequences():
    """Create two temporary directories with different sequences for testing."""
    with tempfile.TemporaryDirectory() as dir1, tempfile.TemporaryDirectory() as dir2:
        # create: foo.0001-0003.exr
        for i in range(1, 4):
            path = os.path.join(dir1, f"foo.{i:04d}.exr")
            with open(path, "wb") as f:
                f.write(b"dummy A\n")

        # create: bar.0001-0002.exr (diff head + 1 missing frame)
        for i in range(1, 3):
            path = os.path.join(dir2, f"bar.{i:04d}.exr")
            with open(path, "wb") as f:
                f.write(b"dummy B\n")

        seq1 = pyseq.get_sequences(os.listdir(dir1))[0]
        seq2 = pyseq.get_sequences(os.listdir(dir2))[0]
        yield dir1, seq1, dir2, seq2


def test_diff_sequences(diff_test_sequences):
    """Test the diff_sequences function."""
    _, seq1, _, seq2 = diff_test_sequences
    diff = diff_sequences(seq1, seq2)

    assert diff["head"][0] != diff["head"][1]
    assert diff["length"][0] == 3
    assert diff["length"][1] == 2
    # assert 3 in diff["missing"]["b_only"]


def test_sdiff_cli_text(diff_test_sequences):
    """Test the sdiff CLI with text output."""
    dir1, _, dir2, _ = diff_test_sequences
    pattern1 = os.path.join(dir1, "foo.%04d.exr")
    pattern2 = os.path.join(dir2, "bar.%04d.exr")

    result = subprocess.run(
        [sdiff_bin, pattern1, pattern2],
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
        text=True,
    )

    assert result.returncode == 0
    assert "Head mismatch" in result.stdout
    assert "Length mismatch" in result.stdout


def test_sdiff_cli_json(diff_test_sequences):
    """Test the sdiff CLI with JSON output."""
    dir1, _, dir2, _ = diff_test_sequences
    pattern1 = os.path.join(dir1, "foo.%04d.exr")
    pattern2 = os.path.join(dir2, "bar.%04d.exr")

    result = subprocess.run(
        [sdiff_bin, "--json", pattern1, pattern2],
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
        text=True,
    )

    assert result.returncode == 0
    data = json.loads(result.stdout)
    assert data["head"][0].startswith("foo")
    assert data["head"][1].startswith("bar")
    assert data["length"] == [3, 2]
