"""
Unit tests for uploader module.
"""

import pytest
from datetime import datetime

from src.uploader import (
    CUCalculator,
    ContentChecker,
    MockUploadClient,
    UploadManager,
    create_mock_upload_manager,
    ChapterUploadData,
    UploadResult,
    UploadStatus,
    CheckStatus,
    QuotaInfo
)


class TestCUCalculator:
    """Test suite for CUCalculator."""

    def test_calculate_cu_basic(self):
        """Test basic CU calculation."""
        calc = CUCalculator()

        # Minimum CU (1-100 chars = 1 CU)
        assert calc.calculate_cu("A" * 50) == 1
        assert calc.calculate_cu("A" * 100) == 1

        # Second CU (101-200 chars = 2 CU)
        assert calc.calculate_cu("A" * 101) == 2
        assert calc.calculate_cu("A" * 200) == 2

        # Third CU (201-300 chars = 3 CU)
        assert calc.calculate_cu("A" * 201) == 3
        assert calc.calculate_cu("A" * 300) == 3

    def test_calculate_cu_examples(self):
        """Test examples from the spec."""
        calc = CUCalculator()

        # "123字" → 2 CU (123/100=1.23→向上取整2)
        assert calc.calculate_cu("A" * 123) == 2

        # "300字" → 3 CU
        assert calc.calculate_cu("A" * 300) == 3

        # "99字" → 1 CU
        assert calc.calculate_cu("A" * 99) == 1

    def test_calculate_cu_empty(self):
        """Test CU calculation for empty content."""
        calc = CUCalculator()
        assert calc.calculate_cu("") == 0

    def test_calculate_cu_from_count(self):
        """Test CU calculation from character count."""
        calc = CUCalculator()
        assert calc.calculate_cu_from_count(0) == 0
        assert calc.calculate_cu_from_count(150) == 2
        assert calc.calculate_cu_from_count(350) == 4

    def test_calculate_batch(self):
        """Test batch CU calculation."""
        calc = CUCalculator()

        # (50/100→1) + (150/100→2) = 3
        result = calc.calculate_batch(["A" * 50, "A" * 150])
        assert result == 3

    def test_estimate_cu(self):
        """Test CU estimation."""
        calc = CUCalculator()

        # 10 chapters × 150 chars each = 10 × 2 CU = 20 CU
        result = calc.estimate_cu(10, 150)
        assert result == 20

    def test_get_breakdown(self):
        """Test CU calculation breakdown."""
        calc = CUCalculator()
        breakdown = calc.get_breakdown("A" * 123)

        assert breakdown["character_count"] == 123
        assert breakdown["cu_cost"] == 2
        assert breakdown["efficiency_percentage"] == pytest.approx(61.5, 0.1)
        assert breakdown["remaining_characters_in_cu"] == 77

    def test_reverse_calculate_max_chars(self):
        """Test reverse calculation of max chars."""
        calc = CUCalculator()

        assert calc.reverse_calculate_max_chars(1) == 100
        assert calc.reverse_calculate_max_chars(5) == 500

    def test_calculate_cost_summary(self):
        """Test cost summary calculation."""
        calc = CUCalculator()

        contents = ["A" * 50, "A" * 150, "A" * 250]
        summary = calc.calculate_cost_summary(contents)

        assert summary["total_chapters"] == 3
        assert summary["total_cu"] == 6  # 1 + 2 + 3 = 6
        assert summary["min_cu"] == 1
        assert summary["max_cu"] == 3

    def test_custom_divisor(self):
        """Test calculator with custom divisor."""
        calc = CUCalculator(divisor=50)

        # With divisor=50: 1-50=1 CU, 51-100=2 CU
        assert calc.calculate_cu("A" * 25) == 1
        assert calc.calculate_cu("A" * 50) == 1
        assert calc.calculate_cu("A" * 51) == 2
        assert calc.calculate_cu("A" * 100) == 2


class TestContentChecker:
    """Test suite for ContentChecker."""

    def test_check_normal_content(self):
        """Test checking normal, compliant content."""
        checker = ContentChecker()
        result = checker.check_chapter("Test Title", "This is normal content.")

        assert result.passed is True
        assert result.status == CheckStatus.PASSED
        assert len(result.issues) == 0

    def test_check_empty_title(self):
        """Test checking chapter with empty title."""
        checker = ContentChecker()
        result = checker.check_chapter("", "Content here")

        assert result.passed is False
        assert len(result.issues) > 0
        assert result.issues[0].type == "empty_title"

    def test_check_sensitive_words(self):
        """Test checking for sensitive words."""
        checker = ContentChecker()
        result = checker.check_chapter("Normal Title", "This contains 暴力 content.")

        assert result.passed is False
        assert any(i.type == "sensitive_word" for i in result.issues)

    def test_check_content_too_short(self):
        """Test checking content that's too short."""
        checker = ContentChecker(min_chapter_length=50)
        result = checker.check_chapter("Title", "Short")

        assert result.passed is False
        assert any(i.type == "content_too_short" for i in result.issues)

    def test_check_content_too_long(self):
        """Test checking content that's too long."""
        checker = ContentChecker(max_chapter_length=100)
        result = checker.check_chapter("Title", "A" * 101)

        assert result.passed is False
        assert any(i.type == "content_too_long" for i in result.issues)

    def test_check_placeholders(self):
        """Test checking for unreplaced placeholders."""
        checker = ContentChecker()
        result = checker.check_chapter("Title", "This has [TERM_test] placeholder.")

        # Bracket-style placeholders are checked
        assert len(result.warnings) > 0 or len(result.issues) > 0

    def test_check_strict_mode(self):
        """Test strict mode where warnings become errors."""
        checker = ContentChecker()
        result = checker.check_chapter("Title", "This has [TERM_test] placeholder.", strict_mode=True)

        # In strict mode, warnings become errors
        assert result.passed is False or len(result.issues) > 0

    def test_check_all_chapters(self):
        """Test checking multiple chapters."""
        checker = ContentChecker()

        chapters = [
            {"title": "Chapter 1", "content": "Normal content."},
            {"title": "Chapter 2", "content": "Content with 暴力."}
        ]

        results = checker.check_all_chapters(chapters)

        assert len(results) == 2
        assert results["ch_0"].passed is True
        assert results["ch_1"].passed is False

    def test_add_sensitive_word(self):
        """Test adding custom sensitive word."""
        checker = ContentChecker()
        checker.add_sensitive_word("testword")

        assert "testword" in checker.sensitive_words

    def test_remove_sensitive_word(self):
        """Test removing sensitive word."""
        checker = ContentChecker()
        checker.remove_sensitive_word("暴力")

        assert "暴力" not in checker.sensitive_words

    def test_set_sensitive_words(self):
        """Test replacing sensitive words list."""
        checker = ContentChecker()
        checker.set_sensitive_words({"custom1", "custom2"})

        assert "custom1" in checker.sensitive_words
        assert "暴力" not in checker.sensitive_words


class TestMockUploadClient:
    """Test suite for MockUploadClient."""

    def test_upload_single_chapter(self):
        """Test uploading a single chapter."""
        client = MockUploadClient()

        result = client.upload_chapter(
            "work123",
            {
                "title": "Chapter 1",
                "content": "A" * 150,
                "index": 0
            }
        )

        assert result.success is True
        assert result.cu_consumed == 2  # 150/100 → 2 CU

    def test_batch_upload(self):
        """Test batch upload."""
        client = MockUploadClient()

        chapters = [
            {"title": "Ch1", "content": "A" * 50, "index": 0},
            {"title": "Ch2", "content": "A" * 150, "index": 1}
        ]

        result = client.batch_upload("work123", chapters)

        assert result.total_chapters == 2
        assert result.successful == 2
        assert result.failed == 0
        assert result.status == UploadStatus.COMPLETED

    def test_check_quota(self):
        """Test quota checking."""
        client = MockUploadClient()
        quota = client.check_quota()

        assert quota.total_cu > 0
        assert quota.remaining_cu > 0

    def test_health_check(self):
        """Test health check."""
        client = MockUploadClient()
        assert client.health_check() is True


class TestUploadManager:
    """Test suite for UploadManager."""

    def test_upload_workflow_dry_run(self):
        """Test upload workflow in dry run mode."""
        mock_client = MockUploadClient()
        manager = UploadManager(mock_client, dry_run=True)

        chapters = [
            {"title": "Chapter 1", "content": "This is chapter one.", "index": 0},
            {"title": "Chapter 2", "content": "This is chapter two.", "index": 1}
        ]

        result = manager.upload_workflow("work123", chapters)

        assert result.status == UploadStatus.COMPLETED
        assert len(result.upload_results) == 2

    def test_upload_workflow_with_content_check_fail(self):
        """Test workflow with content check failure."""
        mock_client = MockUploadClient()
        manager = UploadManager(mock_client, strict_mode=True)

        # Content with sensitive word will fail
        chapters = [
            {"title": "", "content": "Content with empty title causes failure", "index": 0}
        ]

        result = manager.upload_workflow("work123", chapters)

        # Empty title causes content check failure in strict mode
        assert result.status == UploadStatus.FAILED or len(result.upload_results) == 0

    def test_estimate_cu(self):
        """Test CU estimation."""
        mock_client = MockUploadClient()
        manager = UploadManager(mock_client)

        chapters = [
            {"content": "A" * 50},
            {"content": "A" * 150}
        ]

        estimate = manager.estimate_cu(chapters)

        assert estimate["total_cu"] == 3  # 1 + 2

    def test_preview_upload(self):
        """Test upload preview."""
        mock_client = MockUploadClient()
        manager = UploadManager(mock_client)

        chapters = [
            {"title": "Ch1", "content": "Content 1"},
            {"title": "Ch2", "content": "Content 2"}
        ]

        preview = manager.preview_upload("work123", chapters)

        assert preview["total_chapters"] == 2
        assert "content_check" in preview
        assert "cu_estimate" in preview

    def test_validate_before_upload(self):
        """Test pre-upload validation."""
        mock_client = MockUploadClient()
        manager = UploadManager(mock_client)

        # Invalid chapters (missing title, empty content)
        chapters = [
            {"content": "Content without title"},
            {"title": "Title without content", "content": ""}
        ]

        validation = manager.validate_before_upload(chapters)

        # Should have errors or warnings
        assert validation["has_errors"] is True or validation["has_warnings"] is True
        assert len(validation["errors"]) + len(validation["warnings"]) >= 2

    def test_check_quota(self):
        """Test checking quota through manager."""
        mock_client = MockUploadClient()
        manager = UploadManager(mock_client)

        quota_info = manager.check_quota()

        assert "total_cu" in quota_info
        assert "remaining_cu" in quota_info


class TestChapterUploadData:
    """Test suite for ChapterUploadData model."""

    def test_content_length(self):
        """Test content_length property."""
        data = ChapterUploadData(
            "ch1",
            "work1",
            "Title",
            "Content here",
            0
        )

        assert data.content_length == 12

    def test_word_count(self):
        """Test word_count property."""
        data = ChapterUploadData(
            "ch1",
            "work1",
            "Title",
            "Content here",
            0
        )

        # word_count removes newlines and spaces
        assert data.word_count > 0  # Should count non-whitespace characters


class TestUploadResult:
    """Test suite for UploadResult model."""

    def test_success_result(self):
        """Test successful upload result."""
        result = UploadResult(
            success=True,
            chapter_id="ch1",
            server_chapter_id="srv_ch1",
            cu_consumed=2
        )

        assert result.success is True
        assert result.cu_consumed == 2

    def test_failed_result(self):
        """Test failed upload result."""
        result = UploadResult(
            success=False,
            chapter_id="ch1",
            error_message="Upload failed"
        )

        assert result.success is False
        assert result.error_message == "Upload failed"


class TestQuotaInfo:
    """Test suite for QuotaInfo model."""

    def test_quota_calculations(self):
        """Test quota calculation properties."""
        quota = QuotaInfo(
            total_cu=1000,
            used_cu=300,
            remaining_cu=700
        )

        assert quota.usage_percentage == 0.3
        assert quota.is_exceeded is False

    def test_quota_exceeded(self):
        """Test exceeded quota."""
        quota = QuotaInfo(
            total_cu=1000,
            used_cu=1000,
            remaining_cu=0
        )

        assert quota.is_exceeded is True


def test_create_mock_upload_manager():
    """Test factory function for mock upload manager."""
    manager = create_mock_upload_manager()

    assert isinstance(manager, UploadManager)
    # Check that it uses a mock client (has upload_count attribute)
    assert hasattr(manager.client, "upload_count")