import os

import pytest

from iterable.datatypes import BencodeIterable

try:
    import bencode  # noqa: F401

    HAS_BENCODE = True
except ImportError:
    HAS_BENCODE = False

try:
    import bencodepy  # noqa: F401

    HAS_BENCODEPY = True
except ImportError:
    HAS_BENCODEPY = False


@pytest.mark.skipif(
    not HAS_BENCODE and not HAS_BENCODEPY, reason="Bencode support requires 'bencode' or 'bencodepy' package"
)
class TestBencode:
    def test_id(self):
        datatype_id = BencodeIterable.id()
        assert datatype_id == "bencode"

    def test_flatonly(self):
        flag = BencodeIterable.is_flatonly()
        assert not flag

    def test_import_error(self):
        """Test that ImportError is raised when bencode libraries are not available"""
        # This test would need to mock the import, but we'll skip it if libraries are available
        pass

    def test_openclose(self):
        """Test basic open/close"""
        test_file = "testdata/test_bencode.bencode"
        os.makedirs("testdata", exist_ok=True)

        # Create a simple bencode file
        if HAS_BENCODE:
            import bencode

            data = {"key": "value"}
            with open(test_file, "wb") as f:
                f.write(bencode.bencode(data))
        elif HAS_BENCODEPY:
            import bencodepy

            encoder = bencodepy.BencodeEncoder()
            data = {"key": "value"}
            with open(test_file, "wb") as f:
                f.write(encoder.encode(data))

        iterable = BencodeIterable(test_file)
        iterable.close()

        if os.path.exists(test_file):
            os.unlink(test_file)

    def test_read_one(self):
        """Test reading single record"""
        test_file = "testdata/test_bencode_read.bencode"
        os.makedirs("testdata", exist_ok=True)

        # Create bencode file
        if HAS_BENCODE:
            import bencode

            data = {"name": "test", "value": 42}
            with open(test_file, "wb") as f:
                f.write(bencode.bencode(data))
        elif HAS_BENCODEPY:
            import bencodepy

            encoder = bencodepy.BencodeEncoder()
            data = {"name": "test", "value": 42}
            with open(test_file, "wb") as f:
                f.write(encoder.encode(data))

        iterable = BencodeIterable(test_file)
        record = iterable.read()
        assert isinstance(record, dict)
        iterable.close()

        if os.path.exists(test_file):
            os.unlink(test_file)

    def test_read_bulk(self):
        """Test reading bulk records"""
        test_file = "testdata/test_bencode_bulk.bencode"
        os.makedirs("testdata", exist_ok=True)

        # Create bencode file
        if HAS_BENCODE:
            import bencode

            data = {"key1": "value1", "key2": "value2"}
            with open(test_file, "wb") as f:
                f.write(bencode.bencode(data))
        elif HAS_BENCODEPY:
            import bencodepy

            encoder = bencodepy.BencodeEncoder()
            data = {"key1": "value1", "key2": "value2"}
            with open(test_file, "wb") as f:
                f.write(encoder.encode(data))

        iterable = BencodeIterable(test_file)
        chunk = iterable.read_bulk(1)
        assert isinstance(chunk, list)
        assert len(chunk) > 0
        iterable.close()

        if os.path.exists(test_file):
            os.unlink(test_file)

    def test_write(self):
        """Test writing bencode record"""
        test_file = "testdata/test_bencode_write.bencode"
        os.makedirs("testdata", exist_ok=True)

        iterable = BencodeIterable(test_file, mode="w")
        record = {"name": "test", "value": 42}
        iterable.write(record)
        iterable.close()

        # Verify file was created
        assert os.path.exists(test_file)
        assert os.path.getsize(test_file) > 0

        if os.path.exists(test_file):
            os.unlink(test_file)

    def test_write_bulk(self):
        """Test writing bulk bencode records"""
        test_file = "testdata/test_bencode_write_bulk.bencode"
        os.makedirs("testdata", exist_ok=True)

        iterable = BencodeIterable(test_file, mode="w")
        # Note: bencode typically writes single dict, but we test the method
        record = {"key1": "value1", "key2": "value2"}
        iterable.write_bulk([record])
        iterable.close()

        assert os.path.exists(test_file)

        if os.path.exists(test_file):
            os.unlink(test_file)

    def test_reset(self):
        """Test reset functionality"""
        test_file = "testdata/test_bencode_reset.bencode"
        os.makedirs("testdata", exist_ok=True)

        # Create bencode file
        if HAS_BENCODE:
            import bencode

            data = {"key": "value"}
            with open(test_file, "wb") as f:
                f.write(bencode.bencode(data))
        elif HAS_BENCODEPY:
            import bencodepy

            encoder = bencodepy.BencodeEncoder()
            data = {"key": "value"}
            with open(test_file, "wb") as f:
                f.write(encoder.encode(data))

        iterable = BencodeIterable(test_file)
        record1 = iterable.read()
        iterable.reset()
        record2 = iterable.read()
        # After reset, should read the same record
        assert record1 == record2
        iterable.close()

        if os.path.exists(test_file):
            os.unlink(test_file)
