import shutil
from collections.abc import Generator
from contextlib import contextmanager
from pathlib import Path

import pytest
from django.conf import settings
from django.test import TestCase
from django.test import override_settings

from documents import tasks
from documents.barcodes import BarcodePlugin
from documents.consumer import ConsumerError
from documents.data_models import ConsumableDocument
from documents.data_models import DocumentMetadataOverrides
from documents.data_models import DocumentSource
from documents.models import Document
from documents.models import Tag
from documents.plugins.base import StopConsumeTaskError
from documents.tests.utils import ConsumeTaskMixin
from documents.tests.utils import SampleDirMixin
from paperless.models import ApplicationConfiguration
from paperless_testing.assertions import FileSystemAssertsMixin
from paperless_testing.dirs import DirectoriesMixin
from paperless_testing.fakes.progress import FakeProgressManager


class GetReaderPluginMixin:
    @contextmanager
    def get_reader(self, filepath: Path) -> Generator[BarcodePlugin, None, None]:
        reader = BarcodePlugin(
            ConsumableDocument(DocumentSource.ConsumeFolder, original_file=filepath),
            DocumentMetadataOverrides(),
            FakeProgressManager(filepath.name, None),
            self.dirs.scratch_dir,
            "task-id",
        )
        reader.setup()
        yield reader
        reader.cleanup()


class TestBarcode(
    DirectoriesMixin,
    FileSystemAssertsMixin,
    SampleDirMixin,
    GetReaderPluginMixin,
    TestCase,
):
    def test_scan_file_for_separating_barcodes(self) -> None:
        """
        GIVEN:
            - PDF containing barcodes
        WHEN:
            - File is scanned for barcodes
        THEN:
            - Correct page index located
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {0: False})

    @override_settings(
        CONSUMER_BARCODE_TIFF_SUPPORT=True,
    )
    def test_scan_tiff_for_separating_barcodes(self) -> None:
        """
        GIVEN:
            - TIFF image containing barcodes
        WHEN:
            - Consume task returns
        THEN:
            - The file was split
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t-middle.tiff"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertDictEqual(separator_page_numbers, {1: False})

    @override_settings(CONSUMER_ENABLE_ASN_BARCODE=True)
    @pytest.mark.usefixtures("fake_progress_manager")
    def test_asn_barcode_duplicate_in_trash_fails(self) -> None:
        """
        GIVEN:
            - A document with ASN barcode 123 is in the trash
        WHEN:
            - A file with the same barcode ASN is consumed
        THEN:
            - The ASN check is re-run and consumption fails
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-123.pdf"

        first_doc = Document.objects.create(
            title="First ASN 123",
            content="",
            checksum="asn123first",
            mime_type="application/pdf",
            archive_serial_number=123,
        )

        first_doc.delete()

        dupe_asn = settings.SCRATCH_DIR / "barcode-39-asn-123-second.pdf"
        shutil.copy(test_file, dupe_asn)

        with self.assertRaisesRegex(ConsumerError, r"ASN 123.*trash"):
            tasks.consume_file(
                ConsumableDocument(
                    source=DocumentSource.ConsumeFolder,
                    original_file=dupe_asn,
                ),
                None,
            )

    @override_settings(
        CONSUMER_BARCODE_TIFF_SUPPORT=True,
    )
    def test_scan_tiff_with_alpha_for_separating_barcodes(self) -> None:
        """
        GIVEN:
            - TIFF image containing barcodes
        WHEN:
            - Consume task returns
        THEN:
            - The file was split
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t-middle-alpha.tiff"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertDictEqual(separator_page_numbers, {1: False})

    def test_scan_file_for_separating_barcodes_none_present(self) -> None:
        """
        GIVEN:
            - File with no barcodes
        WHEN:
            - File is scanned
        THEN:
            - No barcodes detected
            - No pages to split on
        """
        test_file = self.SAMPLE_DIR / "simple.pdf"
        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {})

    def test_scan_file_for_separating_barcodes_middle_page(self) -> None:
        """
        GIVEN:
            - PDF file containing a separator on page 1 (zero indexed)
        WHEN:
            - File is scanned for barcodes
        THEN:
            - Barcode is detected on page 1 (zero indexed)
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t-middle.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {1: False})

    def test_scan_file_for_separating_barcodes_multiple_pages(self) -> None:
        """
        GIVEN:
            - PDF file containing a separator on pages 2 and 5 (zero indexed)
        WHEN:
            - File is scanned for barcodes
        THEN:
            - Barcode is detected on pages 2 and 5 (zero indexed)
        """
        test_file = self.BARCODE_SAMPLE_DIR / "several-patcht-codes.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {2: False, 5: False})

    def test_scan_file_for_separating_barcodes_hard_to_detect(self) -> None:
        """
        GIVEN:
            - PDF file containing a separator on page 1 (zero indexed)
            - The barcode is upside down, fuzzy or distorted
        WHEN:
            - File is scanned for barcodes
        THEN:
            - Barcode is detected on page 1 (zero indexed)
        """

        for test_file in [
            "patch-code-t-middle-reverse.pdf",
            "patch-code-t-middle-distorted.pdf",
            "patch-code-t-middle-fuzzy.pdf",
        ]:
            test_file = self.BARCODE_SAMPLE_DIR / test_file

            with self.get_reader(test_file) as reader:
                reader.detect()
                separator_page_numbers = reader.get_separation_pages()

                self.assertEqual(reader.pdf_file, test_file)
                self.assertDictEqual(separator_page_numbers, {1: False})

    def test_scan_file_for_separating_barcodes_unreadable(self) -> None:
        """
        GIVEN:
            - PDF file containing a separator on page 1 (zero indexed)
            - The barcode is not readable
        WHEN:
            - File is scanned for barcodes
        THEN:
            - Barcode is detected on page 1 (zero indexed)
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t-middle-unreadable.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {})

    def test_scan_file_for_separating_barcodes_fax_decode(self) -> None:
        """
        GIVEN:
            - A PDF containing an image encoded as CCITT Group 4 encoding
        WHEN:
            - Barcode processing happens with the file
        THEN:
            - The barcode is still detected
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-fax-image.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {1: False})

    def test_scan_file_for_separating_qr_barcodes(self) -> None:
        """
        GIVEN:
            - PDF file containing a separator on page 0 (zero indexed)
            - The barcode is a QR code
        WHEN:
            - File is scanned for barcodes
        THEN:
            - Barcode is detected on page 0 (zero indexed)
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t-qr.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {0: False})

    @override_settings(CONSUMER_BARCODE_STRING="CUSTOM BARCODE")
    def test_scan_file_for_separating_custom_barcodes(self) -> None:
        """
        GIVEN:
            - PDF file containing a separator on page 0 (zero indexed)
            - The barcode separation value is customized
        WHEN:
            - File is scanned for barcodes
        THEN:
            - Barcode is detected on page 0 (zero indexed)
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-custom.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {0: False})

    @override_settings(CONSUMER_BARCODE_STRING="CUSTOM BARCODE")
    def test_scan_file_for_separating_custom_qr_barcodes(self) -> None:
        """
        GIVEN:
            - PDF file containing a separator on page 0 (zero indexed)
            - The barcode separation value is customized
            - The barcode is a QR code
        WHEN:
            - File is scanned for barcodes
        THEN:
            - Barcode is detected on page 0 (zero indexed)
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-qr-custom.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {0: False})

    @override_settings(CONSUMER_BARCODE_STRING="CUSTOM BARCODE")
    def test_scan_file_for_separating_custom_128_barcodes(self) -> None:
        """
        GIVEN:
            - PDF file containing a separator on page 0 (zero indexed)
            - The barcode separation value is customized
            - The barcode is a 128 code
        WHEN:
            - File is scanned for barcodes
        THEN:
            - Barcode is detected on page 0 (zero indexed)
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-128-custom.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {0: False})

    def test_scan_file_for_separating_wrong_qr_barcodes(self) -> None:
        """
        GIVEN:
            - PDF file containing a separator on page 0 (zero indexed)
            - The barcode value is customized
            - The separation value is NOT customized
        WHEN:
            - File is scanned for barcodes
        THEN:
            - No split pages are detected
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-custom.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {})

    @override_settings(CONSUMER_BARCODE_STRING="ADAR-NEXTDOC")
    def test_scan_file_qr_barcodes_was_problem(self) -> None:
        """
        GIVEN:
            - Input PDF with certain QR codes that aren't detected at current size
        WHEN:
            - The input file is scanned for barcodes
        THEN:
            - QR codes are detected
        """
        test_file = self.BARCODE_SAMPLE_DIR / "many-qr-codes.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertGreater(len(reader.barcodes), 0)
            self.assertDictEqual(separator_page_numbers, {1: False})

    def test_scan_file_for_separating_barcodes_password(self) -> None:
        """
        GIVEN:
            - Password protected PDF
        WHEN:
            - File is scanned for barcode
        THEN:
            - Scanning handles the exception without crashing
        """
        test_file = self.SAMPLE_DIR / "password-is-test.pdf"
        with self.assertLogs("paperless.barcodes", level="WARNING") as cm:
            with self.get_reader(test_file) as reader:
                reader.detect()
                warning = cm.output[0]
                expected_str = "WARNING:paperless.barcodes:File is likely password protected, not checking for barcodes"
                self.assertTrue(warning.startswith(expected_str))

                separator_page_numbers = reader.get_separation_pages()

                self.assertEqual(reader.pdf_file, test_file)
                self.assertDictEqual(separator_page_numbers, {})

    def test_separate_pages(self) -> None:
        """
        GIVEN:
            - Input PDF 2 pages after separation
        WHEN:
            - The input file separated at the barcode
        THEN:
            - Two new documents are produced
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t-middle.pdf"

        with self.get_reader(test_file) as reader:
            documents = reader.separate_pages({1: False})

            self.assertEqual(reader.pdf_file, test_file)
            self.assertEqual(len(documents), 2)

    def test_separate_pages_double_code(self) -> None:
        """
        GIVEN:
            - Input PDF with two patch code pages in a row
        WHEN:
            - The input file is split
        THEN:
            - Only two files are output
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t-double.pdf"

        with self.get_reader(test_file) as reader:
            documents = reader.separate_pages({1: False, 2: False})

            self.assertEqual(len(documents), 2)

    @override_settings(CONSUMER_ENABLE_BARCODES=True)
    def test_separate_pages_no_list(self) -> None:
        """
        GIVEN:
            - Input file to separate
        WHEN:
            - No separation pages are provided
        THEN:
            - Nothing happens
        """
        test_file = self.SAMPLE_DIR / "simple.pdf"

        with self.get_reader(test_file) as reader:
            try:
                reader.run()
            except StopConsumeTaskError:
                self.fail("Barcode reader split pages unexpectedly")

    @override_settings(
        CONSUMER_ENABLE_BARCODES=True,
        CONSUMER_BARCODE_TIFF_SUPPORT=True,
    )
    def test_consume_barcode_unsupported_jpg_file(self) -> None:
        """
        GIVEN:
            - JPEG image as input
        WHEN:
            - Consume task returns
        THEN:
            - Barcode reader reported warning
            - Consumption continued with the file
        """
        test_file = self.SAMPLE_DIR / "simple.jpg"

        with self.get_reader(test_file) as reader:
            self.assertFalse(reader.able_to_run)

    @override_settings(
        CONSUMER_ENABLE_BARCODES=True,
        CONSUMER_ENABLE_ASN_BARCODE=True,
    )
    def test_separate_pages_by_asn_barcodes_and_patcht(self) -> None:
        """
        GIVEN:
            - Input PDF with a patch code on page 3 and ASN barcodes on pages 1,5,6,9,11
        WHEN:
            - Input file is split on barcodes
        THEN:
            - Correct number of files produced, split correctly by correct pages
        """
        test_file = self.BARCODE_SAMPLE_DIR / "split-by-asn-2.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(
                reader.pdf_file,
                test_file,
            )
            self.assertDictEqual(
                separator_page_numbers,
                {
                    2: False,
                    4: True,
                    5: True,
                    8: True,
                    10: True,
                },
            )

            document_list = reader.separate_pages(separator_page_numbers)
            self.assertEqual(len(document_list), 6)

    @override_settings(
        CONSUMER_ENABLE_BARCODES=True,
        CONSUMER_ENABLE_ASN_BARCODE=True,
    )
    def test_separate_pages_by_asn_barcodes(self) -> None:
        """
        GIVEN:
            - Input PDF with ASN barcodes on pages 1,3,4,7,9
        WHEN:
            - Input file is split on barcodes
        THEN:
            - Correct number of files produced, split correctly by correct pages
        """
        test_file = self.BARCODE_SAMPLE_DIR / "split-by-asn-1.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(
                separator_page_numbers,
                {
                    2: True,
                    3: True,
                    6: True,
                    8: True,
                },
            )

            document_list = reader.separate_pages(separator_page_numbers)
            self.assertEqual(len(document_list), 5)

    @override_settings(
        CONSUMER_ENABLE_BARCODES=True,
        CONSUMER_ENABLE_ASN_BARCODE=True,
        CONSUMER_BARCODE_RETAIN_SPLIT_PAGES=True,
    )
    def test_separate_pages_by_asn_barcodes_and_patcht_retain_pages(self) -> None:
        """
        GIVEN:
            - Input PDF with a patch code on page 3 and ASN barcodes on pages 1,5,6,9,11
            - Retain split pages is enabled
        WHEN:
            - Input file is split on barcodes
        THEN:
            - Correct number of files produced, split correctly by correct pages, and the split pages are retained
        """
        test_file = self.BARCODE_SAMPLE_DIR / "split-by-asn-2.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(
                reader.pdf_file,
                test_file,
            )
            self.assertDictEqual(
                separator_page_numbers,
                {
                    2: True,
                    4: True,
                    5: True,
                    8: True,
                    10: True,
                },
            )

    def test_barcode_config(self) -> None:
        """
        GIVEN:
            - Barcode app config is set (settings are not)
        WHEN:
            - Document with barcode is processed
        THEN:
            - The barcode config is used
        """
        app_config = ApplicationConfiguration.objects.first()
        assert app_config is not None
        app_config.barcodes_enabled = True
        app_config.barcode_string = "CUSTOM BARCODE"
        app_config.save()
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-custom.pdf"
        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertEqual(reader.pdf_file, test_file)
            self.assertDictEqual(separator_page_numbers, {0: False})


class TestBarcodeNewConsume(
    DirectoriesMixin,
    FileSystemAssertsMixin,
    SampleDirMixin,
    ConsumeTaskMixin,
    TestCase,
):
    @override_settings(CONSUMER_ENABLE_BARCODES=True)
    @pytest.mark.usefixtures("fake_progress_manager")
    def test_consume_barcode_file(self) -> None:
        """
        GIVEN:
            - Incoming file with at 1 barcode producing 2 documents
            - Document includes metadata override information
        WHEN:
            - The document is split
        THEN:
            - Two new consume tasks are created
            - Metadata overrides are preserved for the new consume
            - The document source is unchanged (for consume templates)
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t-middle.pdf"
        temp_copy = self.dirs.scratch_dir / test_file.name
        shutil.copy(test_file, temp_copy)

        overrides = DocumentMetadataOverrides(tag_ids=[1, 2, 9])

        self.assertEqual(
            tasks.consume_file(
                ConsumableDocument(
                    source=DocumentSource.ConsumeFolder,
                    original_file=temp_copy,
                ),
                overrides,
            ),
            {"reason": "Barcode splitting complete!"},
        )
        # 2 new document consume tasks created
        self.assertEqual(self.consume_file_mock.call_count, 2)

        self.assertIsNotFile(temp_copy)

        # Check the split files exist
        # Check the original_path is set
        # Check the source is unchanged
        # Check the overrides are unchanged
        for (
            new_input_doc,
            new_doc_overrides,
        ) in self.get_all_consume_task_call_args():
            self.assertIsFile(new_input_doc.original_file)
            self.assertEqual(new_input_doc.original_path, temp_copy)
            self.assertEqual(new_input_doc.source, DocumentSource.ConsumeFolder)
            self.assertEqual(overrides, new_doc_overrides)


class TestAsnBarcode(DirectoriesMixin, SampleDirMixin, GetReaderPluginMixin, TestCase):
    @contextmanager
    def get_reader(self, filepath: Path) -> BarcodePlugin:
        reader = BarcodePlugin(
            ConsumableDocument(DocumentSource.ConsumeFolder, original_file=filepath),
            DocumentMetadataOverrides(),
            FakeProgressManager(filepath.name, None),
            self.dirs.scratch_dir,
            "task-id",
        )
        reader.setup()
        yield reader
        reader.cleanup()

    @override_settings(CONSUMER_ASN_BARCODE_PREFIX="CUSTOM-PREFIX-")
    def test_scan_file_for_asn_custom_prefix(self) -> None:
        """
        GIVEN:
            - PDF containing an ASN barcode with custom prefix
            - The ASN value is 123
        WHEN:
            - File is scanned for barcodes
        THEN:
            - The ASN is located
            - The ASN integer value is correct
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-custom-prefix.pdf"
        with self.get_reader(test_file) as reader:
            asn = reader.asn

            self.assertEqual(reader.pdf_file, test_file)
            self.assertEqual(asn, 123)

    def test_scan_file_for_asn_barcode(self) -> None:
        """
        GIVEN:
            - PDF containing an ASN barcode
            - The ASN value is 123
        WHEN:
            - File is scanned for barcodes
        THEN:
            - The ASN is located
            - The ASN integer value is correct
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-123.pdf"

        with self.get_reader(test_file) as reader:
            asn = reader.asn

            self.assertEqual(reader.pdf_file, test_file)
            self.assertEqual(asn, 123)

    def test_scan_file_for_asn_not_found(self) -> None:
        """
        GIVEN:
            - PDF without an ASN barcode
        WHEN:
            - File is scanned for barcodes
        THEN:
            - No ASN is retrieved from the document
        """
        test_file = self.BARCODE_SAMPLE_DIR / "patch-code-t.pdf"

        with self.get_reader(test_file) as reader:
            asn = reader.asn

            self.assertEqual(reader.pdf_file, test_file)
            self.assertEqual(asn, None)

    def test_scan_file_for_asn_barcode_invalid(self) -> None:
        """
        GIVEN:
            - PDF containing an ASN barcode
            - The ASN value is XYZXYZ
        WHEN:
            - File is scanned for barcodes
        THEN:
            - The ASN is located
            - The ASN value is not used
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-invalid.pdf"

        with self.get_reader(test_file) as reader:
            asn = reader.asn

            self.assertEqual(reader.pdf_file, test_file)

            self.assertEqual(reader.pdf_file, test_file)
            self.assertEqual(asn, None)

    @override_settings(CONSUMER_ENABLE_ASN_BARCODE=True)
    @pytest.mark.usefixtures("fake_progress_manager")
    def test_consume_barcode_file_asn_assignment(self) -> None:
        """
        GIVEN:
            - PDF containing an ASN barcode
            - The ASN value is 123
        WHEN:
            - File is scanned for barcodes
        THEN:
            - The ASN is located
            - The ASN integer value is correct
            - The ASN is provided as the override value to the consumer
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-123.pdf"

        dst = settings.SCRATCH_DIR / "barcode-39-asn-123.pdf"
        shutil.copy(test_file, dst)

        tasks.consume_file(
            ConsumableDocument(
                source=DocumentSource.ConsumeFolder,
                original_file=dst,
            ),
            None,
        )

        document = Document.objects.first()
        assert document is not None

        self.assertEqual(document.archive_serial_number, 123)

    def test_scan_file_for_qrcode_without_upscale(self) -> None:
        """
        GIVEN:
            - A printed and scanned PDF document with a rather small QR code
        WHEN:
            - ASN barcode detection is run with default settings
        THEN:
            - ASN 123 is detected
        """

        test_file = self.BARCODE_SAMPLE_DIR / "barcode-qr-asn-000123-upscale-dpi.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            self.assertEqual(len(reader.barcodes), 1)
            self.assertEqual(reader.asn, 123)

    @override_settings(CONSUMER_BARCODE_DPI=600)
    @override_settings(CONSUMER_BARCODE_UPSCALE=1.5)
    def test_scan_file_for_qrcode_with_upscale(self) -> None:
        """
        GIVEN:
            - A printed and scanned PDF document with a rather small QR code
        WHEN:
            - ASN barcode detection is run with 600dpi and an upscale factor of 1.5
        THEN:
            - ASN 123 is detected
        """

        test_file = self.BARCODE_SAMPLE_DIR / "barcode-qr-asn-000123-upscale-dpi.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            self.assertEqual(len(reader.barcodes), 1)
            self.assertEqual(reader.asn, 123)


class TestTagBarcode(DirectoriesMixin, SampleDirMixin, GetReaderPluginMixin, TestCase):
    @contextmanager
    def get_reader(self, filepath: Path) -> BarcodePlugin:
        reader = BarcodePlugin(
            ConsumableDocument(DocumentSource.ConsumeFolder, original_file=filepath),
            DocumentMetadataOverrides(),
            FakeProgressManager(filepath.name, None),
            self.dirs.scratch_dir,
            "task-id",
        )
        reader.setup()
        yield reader
        reader.cleanup()

    @override_settings(
        CONSUMER_ENABLE_TAG_BARCODE=True,
        CONSUMER_TAG_BARCODE_MAPPING={"TAG:(.*)": "\\g<1>"},
    )
    def test_barcode_without_tag_match(self) -> None:
        """
        GIVEN:
            - Barcode that does not match any TAG mapping pattern
            - TAG mapping configured for "TAG:" prefix only
        WHEN:
            - is_tag property is checked on an ASN barcode
        THEN:
            - Returns False
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-123.pdf"
        with self.get_reader(test_file) as reader:
            reader.detect()

            self.assertGreater(
                len(reader.barcodes),
                0,
                "Should have detected at least one barcode",
            )
            asn_barcode = reader.barcodes[0]
            self.assertFalse(
                asn_barcode.is_tag,
                f"ASN barcode '{asn_barcode.value}' should not match TAG: pattern",
            )

    @override_settings(CONSUMER_ENABLE_TAG_BARCODE=True)
    def test_scan_file_without_matching_barcodes(self) -> None:
        """
        GIVEN:
            - PDF containing tag barcodes but none with matching prefix (default "TAG:")
        WHEN:
            - File is scanned for barcodes
        THEN:
            - No TAG has been created
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-custom-prefix.pdf"
        with self.get_reader(test_file) as reader:
            reader.run()
            tags = reader.metadata.tag_ids
            self.assertEqual(tags, None)

    @override_settings(
        CONSUMER_ENABLE_TAG_BARCODE=False,
        CONSUMER_TAG_BARCODE_MAPPING={"CUSTOM-PREFIX-(.*)": "\\g<1>"},
    )
    def test_scan_file_with_matching_barcode_but_function_disabled(self) -> None:
        """
        GIVEN:
            - PDF containing a tag barcode with matching custom prefix
            - The tag barcode functionality is disabled
        WHEN:
            - File is scanned for barcodes
        THEN:
            - No TAG has been created
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-custom-prefix.pdf"
        with self.get_reader(test_file) as reader:
            reader.run()
            tags = reader.metadata.tag_ids
            self.assertEqual(tags, None)

    @override_settings(
        CONSUMER_ENABLE_TAG_BARCODE=True,
        CONSUMER_TAG_BARCODE_MAPPING={"CUSTOM-PREFIX-(.*)": "\\g<1>"},
    )
    def test_scan_file_for_tag_custom_prefix(self) -> None:
        """
        GIVEN:
            - PDF containing a tag barcode with custom prefix
            - The barcode mapping accepts this prefix and removes it from the mapped tag value
            - The created tag is the non-prefixed values
        WHEN:
            - File is scanned for barcodes
        THEN:
            - The TAG is located
            - One TAG has been created
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-custom-prefix.pdf"
        with self.get_reader(test_file) as reader:
            reader.metadata.tag_ids = [99]
            reader.run()
            self.assertEqual(reader.pdf_file, test_file)
            tags = reader.metadata.tag_ids
            self.assertEqual(len(tags), 2)
            self.assertEqual(tags[0], 99)
            self.assertEqual(Tag.objects.get(name__iexact="00123").pk, tags[1])

    @override_settings(
        CONSUMER_ENABLE_TAG_BARCODE=True,
        CONSUMER_TAG_BARCODE_MAPPING={"ASN(.*)": "\\g<1>"},
        CONSUMER_ENABLE_ASN_BARCODE=False,
    )
    def test_scan_file_for_many_custom_tags(self) -> None:
        """
        GIVEN:
            - PDF containing multiple tag barcode with custom prefix
            - The barcode mapping accepts this prefix and removes it from the mapped tag value
            - The created tags are the non-prefixed values
        WHEN:
            - File is scanned for barcodes
        THEN:
            - The TAG is located
            - File Tags have been created
        """
        test_file = self.BARCODE_SAMPLE_DIR / "split-by-asn-1.pdf"
        with self.get_reader(test_file) as reader:
            reader.run()
            tags = reader.metadata.tag_ids
            self.assertEqual(len(tags), 5)
            self.assertEqual(Tag.objects.get(name__iexact="00123").pk, tags[0])
            self.assertEqual(Tag.objects.get(name__iexact="00124").pk, tags[1])
            self.assertEqual(Tag.objects.get(name__iexact="00125").pk, tags[2])
            self.assertEqual(Tag.objects.get(name__iexact="00126").pk, tags[3])
            self.assertEqual(Tag.objects.get(name__iexact="00127").pk, tags[4])

    @override_settings(
        CONSUMER_ENABLE_TAG_BARCODE=True,
        CONSUMER_TAG_BARCODE_MAPPING={"CUSTOM-PREFIX-(.*)": "\\g<3>"},
    )
    def test_scan_file_for_tag_raises_value_error(self) -> None:
        """
        GIVEN:
            - Any error occurs during tag barcode processing
        THEN:
            - The processing should be skipped and not break the import
        """
        test_file = self.BARCODE_SAMPLE_DIR / "barcode-39-asn-custom-prefix.pdf"
        with self.get_reader(test_file) as reader:
            reader.run()
            # expect error to be caught and logged only
            tags = reader.metadata.tag_ids
            self.assertEqual(tags, None)

    @override_settings(
        CONSUMER_ENABLE_TAG_BARCODE=True,
        CONSUMER_TAG_BARCODE_SPLIT=True,
        CONSUMER_TAG_BARCODE_MAPPING={"TAG:(.*)": "\\g<1>"},
    )
    def test_split_on_tag_barcodes(self) -> None:
        """
        GIVEN:
            - PDF containing barcodes with TAG: prefix
            - Tag barcode splitting is enabled with TAG: mapping
        WHEN:
            - File is processed
        THEN:
            - Splits should occur at pages with TAG barcodes
            - Tags should NOT be assigned when tag splitting is enabled (they're assigned during re-consumption)
        """
        test_file = self.BARCODE_SAMPLE_DIR / "split-by-tag-basic.pdf"
        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_page_numbers = reader.get_separation_pages()

            self.assertDictEqual(separator_page_numbers, {1: True, 3: True})

            tags = reader.metadata.tag_ids
            self.assertIsNone(tags)

    @override_settings(
        CONSUMER_ENABLE_TAG_BARCODE=True,
        CONSUMER_TAG_BARCODE_SPLIT=False,
        CONSUMER_TAG_BARCODE_MAPPING={"TAG:(.*)": "\\g<1>"},
    )
    def test_no_split_when_tag_split_disabled(self) -> None:
        """
        GIVEN:
            - PDF containing TAG barcodes (TAG:invoice, TAG:receipt)
            - Tag barcode splitting is disabled
        WHEN:
            - File is processed
        THEN:
            - No separation pages are identified
            - Tags are still extracted and assigned
        """
        test_file = self.BARCODE_SAMPLE_DIR / "split-by-tag-basic.pdf"
        with self.get_reader(test_file) as reader:
            reader.run()
            separator_page_numbers = reader.get_separation_pages()

            self.assertDictEqual(separator_page_numbers, {})

            tags = reader.metadata.tag_ids
            self.assertEqual(len(tags), 2)

    @override_settings(
        CONSUMER_ENABLE_BARCODES=True,
        CONSUMER_ENABLE_TAG_BARCODE=True,
        CONSUMER_TAG_BARCODE_SPLIT=True,
        CONSUMER_TAG_BARCODE_MAPPING={"TAG:(.*)": "\\g<1>"},
        CELERY_TASK_ALWAYS_EAGER=True,
        OCR_MODE="auto",
    )
    @pytest.mark.usefixtures("fake_progress_manager")
    def test_consume_barcode_file_tag_split_and_assignment(self) -> None:
        """
        GIVEN:
            - PDF containing TAG barcodes on pages 2 and 4 (TAG:invoice, TAG:receipt)
            - Tag barcode splitting is enabled
        WHEN:
            - File is consumed
        THEN:
            - PDF is split into 3 documents at barcode pages
            - Each split document has the appropriate TAG barcodes extracted and assigned
            - Document 1: page 1 (no tags)
            - Document 2: pages 2-3 with TAG:invoice
            - Document 3: pages 4-5 with TAG:receipt
        """
        test_file = self.BARCODE_SAMPLE_DIR / "split-by-tag-basic.pdf"
        dst = settings.SCRATCH_DIR / "split-by-tag-basic.pdf"
        shutil.copy(test_file, dst)

        result = tasks.consume_file(
            ConsumableDocument(
                source=DocumentSource.ConsumeFolder,
                original_file=dst,
            ),
            None,
        )

        self.assertEqual(result, {"reason": "Barcode splitting complete!"})

        documents = Document.objects.all().order_by("id")
        self.assertEqual(documents.count(), 3)

        doc1 = documents[0]
        self.assertEqual(doc1.tags.count(), 0)

        doc2 = documents[1]
        self.assertEqual(doc2.tags.count(), 1)
        _tag_1 = doc2.tags.first()
        assert _tag_1 is not None
        self.assertEqual(_tag_1.name, "invoice")

        doc3 = documents[2]
        self.assertEqual(doc3.tags.count(), 1)
        _tag_2 = doc3.tags.first()
        assert _tag_2 is not None
        self.assertEqual(_tag_2.name, "receipt")

    @override_settings(
        CONSUMER_ENABLE_TAG_BARCODE=True,
        CONSUMER_TAG_BARCODE_SPLIT=True,
        CONSUMER_TAG_BARCODE_MAPPING={"ASN(.*)": "ASN_\\g<1>", "TAG:(.*)": "\\g<1>"},
    )
    def test_split_by_mixed_asn_tag_backwards_compat(self) -> None:
        """
        GIVEN:
            - PDF with mixed ASN and TAG barcodes
            - Mapping that treats ASN barcodes as tags (backwards compatibility)
            - ASN12345 on page 1, TAG:personal on page 3, ASN13456 on page 5, TAG:business on page 7
        WHEN:
            - File is consumed
        THEN:
            - Both ASN and TAG barcodes trigger splits
            - Split points are at pages 3, 5, and 7 (page 1 never splits)
            - 4 separate documents are produced
        """
        test_file = self.BARCODE_SAMPLE_DIR / "split-by-tag-mixed-asn.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_pages = reader.get_separation_pages()

            self.assertDictEqual(separator_pages, {2: True, 4: True, 6: True})

            document_list = reader.separate_pages(separator_pages)
            self.assertEqual(len(document_list), 4)

    @override_settings(
        CONSUMER_ENABLE_TAG_BARCODE=True,
        CONSUMER_TAG_BARCODE_SPLIT=True,
        CONSUMER_TAG_BARCODE_MAPPING={"TAG:(.*)": "\\g<1>"},
    )
    def test_split_by_tag_multiple_per_page(self) -> None:
        """
        GIVEN:
            - PDF with multiple TAG barcodes on same page
            - TAG:invoice and TAG:expense on page 2, TAG:receipt on page 4
        WHEN:
            - File is processed
        THEN:
            - Pages with barcodes trigger splits
            - Split points at pages 2 and 4
            - 3 separate documents are produced
        """
        test_file = self.BARCODE_SAMPLE_DIR / "split-by-tag-multiple-per-page.pdf"

        with self.get_reader(test_file) as reader:
            reader.detect()
            separator_pages = reader.get_separation_pages()

            self.assertDictEqual(separator_pages, {1: True, 3: True})

            document_list = reader.separate_pages(separator_pages)
            self.assertEqual(len(document_list), 3)