"""
Tests for the One-Click Translation Workflow component (Story 7.20).
"""

import pytest
from pathlib import Path
import tempfile
from datetime import datetime

from PyQt6.QtWidgets import QApplication

from src.ui.one_click_translation import (
    WorkflowStep,
    WorkflowConfig,
    WorkflowResult,
    WorkflowProgress,
    OneClickWorkflowWidget,
    OneClickTranslationDialog,
)


@pytest.fixture
def app(qtbot):
    """Create QApplication for tests."""
    return QApplication.instance() or QApplication([])


@pytest.fixture
def sample_config():
    """Create sample workflow config."""
    return WorkflowConfig(
        source_lang="zh",
        target_lang="en",
        extract_terms=True,
        use_gpu=True
    )


@pytest.fixture
def sample_result():
    """Create sample workflow result."""
    return WorkflowResult(
        success=True,
        steps_completed=[
            WorkflowStep.IMPORTING,
            WorkflowStep.CLEANING,
            WorkflowStep.EXTRACTING_TERMS,
            WorkflowStep.TRANSLATING,
            WorkflowStep.FORMATTING,
            WorkflowStep.EXPORTING,
        ],
        total_chapters=10,
        completed_chapters=10,
        failed_chapters=0,
        total_words=30000,
        translated_words=29400,
        elapsed_time_seconds=600.0,
        output_path=Path("/output/translation")
    )


class TestWorkflowStep:
    """Tests for WorkflowStep enum."""

    def test_step_values(self):
        """Test WorkflowStep enum values."""
        assert WorkflowStep.IDLE.value == "idle"
        assert WorkflowStep.IMPORTING.value == "importing"
        assert WorkflowStep.TRANSLATING.value == "translating"
        assert WorkflowStep.COMPLETED.value == "completed"
        assert WorkflowStep.FAILED.value == "failed"


class TestWorkflowConfig:
    """Tests for WorkflowConfig."""

    def test_default_values(self):
        """Test default configuration values."""
        config = WorkflowConfig()

        assert config.clean_empty_lines is True
        assert config.max_segment_length == 900
        assert config.extract_terms is True
        assert config.use_gpu is True
        assert config.source_lang == "zh"
        assert config.target_lang == "en"

    def test_custom_values(self):
        """Test custom configuration."""
        config = WorkflowConfig(
            source_lang="ja",
            target_lang="ko",
            extract_terms=False,
            batch_size=16
        )

        assert config.source_lang == "ja"
        assert config.target_lang == "ko"
        assert config.extract_terms is False
        assert config.batch_size == 16


class TestWorkflowResult:
    """Tests for WorkflowResult."""

    def test_success_result(self, sample_result):
        """Test successful result."""
        assert sample_result.success is True
        assert sample_result.completed_chapters == 10
        assert sample_result.translated_words == 29400

    def test_failure_result(self):
        """Test failed result."""
        result = WorkflowResult(
            success=False,
            steps_completed=[WorkflowStep.IMPORTING],
            error="Network error"
        )

        assert result.success is False
        assert result.error == "Network error"
        assert result.completed_chapters == 0

    def test_completion_percentage(self, sample_result):
        """Test chapter completion rate."""
        rate = sample_result.completed_chapters / sample_result.total_chapters
        assert rate == 1.0


class TestWorkflowProgress:
    """Tests for WorkflowProgress."""

    def test_creation(self):
        """Test creating progress update."""
        progress = WorkflowProgress(
            current_step=WorkflowStep.TRANSLATING,
            step_name="翻译中",
            progress=50,
            overall_progress=60,
            message="正在处理..."
        )

        assert progress.current_step == WorkflowStep.TRANSLATING
        assert progress.progress == 50
        assert progress.overall_progress == 60

    def test_with_chapter(self):
        """Test progress with chapter info."""
        progress = WorkflowProgress(
            current_step=WorkflowStep.TRANSLATING,
            step_name="翻译中",
            progress=25,
            overall_progress=50,
            message="翻译中",
            chapter="Chapter 1"
        )

        assert progress.chapter == "Chapter 1"


class TestOneClickWorkflowWidget:
    """Tests for OneClickWorkflowWidget."""

    def test_initialization(self, qtbot):
        """Test widget initialization."""
        widget = OneClickWorkflowWidget()
        qtbot.addWidget(widget)

        assert widget._input_files == []
        assert widget._config is not None

    def test_config_property(self, qtbot):
        """Test config property."""
        widget = OneClickWorkflowWidget()
        qtbot.addWidget(widget)

        config = widget.config
        assert config is not None
        assert isinstance(config, WorkflowConfig)

    def test_set_input_files(self, qtbot, tmp_path):
        """Test setting input files."""
        widget = OneClickWorkflowWidget()
        qtbot.addWidget(widget)

        files = [tmp_path / "test1.txt", tmp_path / "test2.md"]
        for f in files:
            f.write_text("content")

        widget.set_input_files(files)

        assert widget.file_count == 2

    def test_update_files_display(self, qtbot, tmp_path):
        """Test file display update."""
        widget = OneClickWorkflowWidget()
        qtbot.addWidget(widget)

        # No files
        widget._update_files_display()
        assert widget._start_btn.isEnabled() is False

        # Add files
        files = [tmp_path / "test.txt"]
        files[0].write_text("content")
        widget._input_files = files
        widget._update_files_display()

        assert widget._start_btn.isEnabled() is True
        assert "1 个项目" in widget._files_label.text()

    def test_show_result(self, qtbot, sample_result):
        """Test showing result."""
        widget = OneClickWorkflowWidget()
        qtbot.addWidget(widget)

        widget._show_result(sample_result)

        assert widget._result_group.isVisible() is True
        assert widget._last_result == sample_result

    def test_reset_ui(self, qtbot):
        """Test UI reset."""
        widget = OneClickWorkflowWidget()
        qtbot.addWidget(widget)

        # Simulate some progress
        widget._progress_bar.setValue(50)
        widget._result_group.setVisible(True)

        widget._reset_ui()

        assert widget._progress_bar.value() == 0
        assert widget._result_group.isVisible() is False
        assert widget._cancel_btn.isEnabled() is False


class TestOneClickTranslationDialog:
    """Tests for OneClickTranslationDialog."""

    def test_initialization_without_files(self, qtbot):
        """Test dialog initialization without files."""
        dialog = OneClickTranslationDialog()
        qtbot.addWidget(dialog)

        assert dialog is not None
        assert dialog._widget is not None

    def test_initialization_with_files(self, qtbot, tmp_path):
        """Test dialog initialization with files."""
        files = [tmp_path / "test.txt"]
        files[0].write_text("content")

        dialog = OneClickTranslationDialog(files)
        qtbot.addWidget(dialog)

        assert dialog is not None

    def test_set_input_files(self, qtbot, tmp_path):
        """Test setting input files on dialog."""
        dialog = OneClickTranslationDialog()
        qtbot.addWidget(dialog)

        files = [tmp_path / "test.txt"]
        files[0].write_text("content")

        dialog.set_input_files(files)

        assert dialog._widget.file_count == 1