"""
Tests for UI models - no GUI required.
"""

import pytest
from pathlib import Path
from datetime import datetime, timedelta

from src.ui.models import (
    FileItem,
    FileStatus,
    TranslationTask,
    TaskStatus,
    ProgressUpdate,
    Statistics,
)


class TestFileItem:
    """Test FileItem data model."""

    def test_file_item_creation_defaults(self):
        """Test creating a file item with default values."""
        item = FileItem(
            path=Path("/test/file.txt"),
            name="file.txt",
            size=2048,
        )

        assert item.name == "file.txt"
        assert item.path == Path("/test/file.txt")
        assert item.size == 2048
        assert item.status == FileStatus.PENDING
        assert item.chapters == 0
        assert item.total_words == 0
        assert item.translated_words == 0
        assert item.error_message is None
        assert isinstance(item.added_time, datetime)

    def test_file_item_creation_with_values(self):
        """Test creating a file item with specific values."""
        now = datetime.now()
        item = FileItem(
            path=Path("/test/novel.txt"),
            name="novel.txt",
            size=1024 * 100,
            status=FileStatus.TRANSLATING,
            chapters=50,
            total_words=100000,
            translated_words=25000,
            error_message=None,
            added_time=now,
        )

        assert item.name == "novel.txt"
        assert item.status == FileStatus.TRANSLATING
        assert item.chapters == 50
        assert item.total_words == 100000
        assert item.translated_words == 25000

    def test_progress_calculation(self):
        """Test progress percentage calculation."""
        item = FileItem(
            path=Path("/test/file.txt"),
            name="file.txt",
            size=1024,
            total_words=1000,
            translated_words=500,
        )

        assert item.progress == 50.0

    def test_progress_zero_when_no_total(self):
        """Test progress is zero when total_words is 0."""
        item = FileItem(
            path=Path("/test/file.txt"),
            name="file.txt",
            size=1024,
            total_words=0,
            translated_words=0,
        )

        assert item.progress == 0.0

    def test_progress_complete(self):
        """Test progress when translation is complete."""
        item = FileItem(
            path=Path("/test/file.txt"),
            name="file.txt",
            size=1024,
            total_words=1000,
            translated_words=1000,
        )

        assert item.progress == 100.0

    def test_size_formatting_bytes(self):
        """Test size formatting for bytes."""
        item = FileItem(
            path=Path("/test/small.txt"),
            name="small.txt",
            size=512,
        )

        assert "512" in item.size_formatted
        assert "B" in item.size_formatted

    def test_size_formatting_kilobytes(self):
        """Test size formatting for kilobytes."""
        item = FileItem(
            path=Path("/test/medium.txt"),
            name="medium.txt",
            size=2048,
        )

        assert "KB" in item.size_formatted

    def test_size_formatting_megabytes(self):
        """Test size formatting for megabytes."""
        item = FileItem(
            path=Path("/test/large.txt"),
            name="large.txt",
            size=1024 * 1024 * 5,
        )

        assert "MB" in item.size_formatted


class TestTranslationTask:
    """Test TranslationTask data model."""

    def test_task_creation_defaults(self):
        """Test creating a task with default values."""
        task = TranslationTask(id="task-123")

        assert task.id == "task-123"
        assert task.status == TaskStatus.IDLE
        assert task.current_stage == ""
        assert task.current_chapter == 0
        assert task.total_chapters == 0
        assert task.start_time is None
        assert task.end_time is None
        assert task.error_message is None
        assert task.file_items == []

    def test_task_creation_with_file_items(self):
        """Test creating a task with file items."""
        file1 = FileItem(Path("/test/file1.txt"), "file1.txt", 1024)
        file2 = FileItem(Path("/test/file2.txt"), "file2.txt", 2048)

        task = TranslationTask(
            id="task-456",
            file_items=[file1, file2],
            status=TaskStatus.RUNNING,
            current_stage="translating",
            current_chapter=5,
            total_chapters=10,
        )

        assert len(task.file_items) == 2
        assert task.status == TaskStatus.RUNNING
        assert task.current_stage == "translating"
        assert task.current_chapter == 5
        assert task.total_chapters == 10

    def test_progress_calculation(self):
        """Test task progress calculation."""
        task = TranslationTask(
            id="task-1",
            current_chapter=25,
            total_chapters=100,
        )

        assert task.progress == 25.0

    def test_progress_zero_when_no_total(self):
        """Test progress is zero when total_chapters is 0."""
        task = TranslationTask(
            id="task-1",
            current_chapter=0,
            total_chapters=0,
        )

        assert task.progress == 0.0

    def test_elapsed_time_without_start(self):
        """Test elapsed time when task hasn't started."""
        task = TranslationTask(id="task-1")

        assert task.elapsed_time is None

    def test_elapsed_time_with_start(self):
        """Test elapsed time calculation."""
        start = datetime.now() - timedelta(seconds=60)
        task = TranslationTask(
            id="task-1",
            start_time=start,
        )

        # Should be approximately 60 seconds
        assert task.elapsed_time is not None
        assert 59 <= task.elapsed_time <= 61

    def test_elapsed_time_with_end(self):
        """Test elapsed time when task is complete."""
        start = datetime.now() - timedelta(seconds=120)
        end = start + timedelta(seconds=60)
        task = TranslationTask(
            id="task-1",
            start_time=start,
            end_time=end,
        )

        assert task.elapsed_time == 60.0

    def test_is_running(self):
        """Test is_running property."""
        task_running = TranslationTask(id="task-1", status=TaskStatus.RUNNING)
        task_idle = TranslationTask(id="task-2", status=TaskStatus.IDLE)

        assert task_running.is_running is True
        assert task_idle.is_running is False

    def test_is_paused(self):
        """Test is_paused property."""
        task_paused = TranslationTask(id="task-1", status=TaskStatus.PAUSED)
        task_running = TranslationTask(id="task-2", status=TaskStatus.RUNNING)

        assert task_paused.is_paused is True
        assert task_running.is_paused is False

    def test_can_start(self):
        """Test can_start property."""
        statuses_can_start = [
            TaskStatus.IDLE,
            TaskStatus.PAUSED,
            TaskStatus.FAILED,
        ]

        for status in statuses_can_start:
            task = TranslationTask(id=f"task-{status.value}", status=status)
            assert task.can_start is True, f"Status {status} should be startable"

        # These cannot be started
        task_running = TranslationTask(id="task-running", status=TaskStatus.RUNNING)
        task_completed = TranslationTask(id="task-completed", status=TaskStatus.COMPLETED)
        task_cancelled = TranslationTask(id="task-cancelled", status=TaskStatus.CANCELLED)

        assert task_running.can_start is False
        assert task_completed.can_start is False
        assert task_cancelled.can_start is False

    def test_can_pause(self):
        """Test can_pause property."""
        task_running = TranslationTask(id="task-1", status=TaskStatus.RUNNING)
        task_idle = TranslationTask(id="task-2", status=TaskStatus.IDLE)

        assert task_running.can_pause is True
        assert task_idle.can_pause is False

    def test_can_cancel(self):
        """Test can_cancel property."""
        task_running = TranslationTask(id="task-1", status=TaskStatus.RUNNING)
        task_paused = TranslationTask(id="task-2", status=TaskStatus.PAUSED)
        task_idle = TranslationTask(id="task-3", status=TaskStatus.IDLE)

        assert task_running.can_cancel is True
        assert task_paused.can_cancel is True
        assert task_idle.can_cancel is False


class TestProgressUpdate:
    """Test ProgressUpdate data model."""

    def test_progress_update_creation(self):
        """Test creating a progress update."""
        update = ProgressUpdate(
            task_id="task-123",
            stage="translating",
            current=5,
            total=10,
            message="Processing chapter 5",
            elapsed_seconds=60,
            eta_seconds=120,
        )

        assert update.task_id == "task-123"
        assert update.stage == "translating"
        assert update.current == 5
        assert update.total == 10
        assert update.message == "Processing chapter 5"
        assert update.elapsed_seconds == 60
        assert update.eta_seconds == 120

    def test_progress_calculation(self):
        """Test progress percentage calculation."""
        update = ProgressUpdate(
            task_id="task-1",
            stage="translating",
            current=3,
            total=10,
        )

        assert update.progress == 30.0

    def test_progress_zero_when_no_total(self):
        """Test progress is zero when total is 0."""
        update = ProgressUpdate(
            task_id="task-1",
            stage="translating",
            current=0,
            total=0,
        )

        assert update.progress == 0.0

    def test_progress_complete(self):
        """Test progress when complete."""
        update = ProgressUpdate(
            task_id="task-1",
            stage="translating",
            current=10,
            total=10,
        )

        assert update.progress == 100.0


class TestStatistics:
    """Test Statistics data model."""

    def test_statistics_defaults(self):
        """Test statistics with default values."""
        stats = Statistics()

        assert stats.total_translated_words == 0
        assert stats.total_chapters == 0
        assert stats.total_time_seconds == 0
        assert stats.successful_tasks == 0
        assert stats.failed_tasks == 0
        assert stats.terminology_usage_rate == 0.0

    def test_statistics_with_values(self):
        """Test statistics with specific values."""
        stats = Statistics(
            total_translated_words=50000,
            total_chapters=100,
            total_time_seconds=3000,
            successful_tasks=5,
            failed_tasks=1,
            terminology_usage_rate=85.5,
        )

        assert stats.total_translated_words == 50000
        assert stats.total_chapters == 100
        assert stats.total_time_seconds == 3000
        assert stats.successful_tasks == 5
        assert stats.failed_tasks == 1
        assert stats.terminology_usage_rate == 85.5

    def test_average_speed_calculation(self):
        """Test average translation speed calculation."""
        stats = Statistics(
            total_translated_words=6000,  # 6000 words
            total_time_seconds=120,  # 2 minutes
        )

        # 6000 words / 120 seconds * 60 = 3000 words/minute
        assert stats.average_speed == 3000.0

    def test_average_speed_zero_time(self):
        """Test average speed when time is zero."""
        stats = Statistics(
            total_translated_words=1000,
            total_time_seconds=0,
        )

        assert stats.average_speed == 0.0

    def test_completion_rate_calculation(self):
        """Test task completion rate calculation."""
        stats = Statistics(
            successful_tasks=9,
            failed_tasks=1,
        )

        # 9 / (9 + 1) * 100 = 90%
        assert stats.completion_rate == 90.0

    def test_completion_rate_no_tasks(self):
        """Test completion rate when no tasks."""
        stats = Statistics()

        assert stats.completion_rate == 0.0

    def test_total_tasks(self):
        """Test total tasks property."""
        stats = Statistics(
            successful_tasks=5,
            failed_tasks=2,
        )

        assert stats.total_tasks == 7


class TestFileStatus:
    """Test FileStatus enum."""

    def test_all_status_values(self):
        """Test all status values exist."""
        assert FileStatus.PENDING.value == "pending"
        assert FileStatus.IMPORTING.value == "importing"
        assert FileStatus.READY.value == "ready"
        assert FileStatus.TRANSLATING.value == "translating"
        assert FileStatus.PAUSED.value == "paused"
        assert FileStatus.COMPLETED.value == "completed"
        assert FileStatus.FAILED.value == "failed"


class TestTaskStatus:
    """Test TaskStatus enum."""

    def test_all_status_values(self):
        """Test all status values exist."""
        assert TaskStatus.IDLE.value == "idle"
        assert TaskStatus.RUNNING.value == "running"
        assert TaskStatus.PAUSED.value == "paused"
        assert TaskStatus.COMPLETED.value == "completed"
        assert TaskStatus.FAILED.value == "failed"
        assert TaskStatus.CANCELLED.value == "cancelled"