"""
配置文件管理测试
"""
from pathlib import Path
import pytest

from pl_japanese.cleaner.config import (
    JCleanConfig, load_config, find_config_file, generate_sample_config
)


def test_default_config():
    """没有配置文件时使用默认值"""
    config = JCleanConfig()
    assert config.tasks_root == 'tasks'
    assert config.vocabulary == 'data/db/vocabulary.txt'
    assert config.skipped == 'data/db/skipped.txt'


def test_resolve_path_absolute(tmp_path):
    """绝对路径直接返回"""
    config = JCleanConfig(_config_file=tmp_path / 'jclean.toml')
    # 使用 Windows 兼容的绝对路径
    abs_path = str((tmp_path / 'absolute_file.txt').resolve())
    assert config.resolve_path(abs_path) == abs_path


def test_resolve_path_relative_with_config(tmp_path):
    """相对路径相对配置文件所在目录"""
    config_file = tmp_path / 'jclean.toml'
    config_file.write_text('[paths]', encoding='utf-8')
    
    config = JCleanConfig(_config_file=config_file)
    resolved = config.resolve_path('tasks')
    expected = str((tmp_path / 'tasks').resolve())
    assert resolved == expected


def test_resolve_path_relative_no_config(tmp_path):
    """没有配置文件时，相对当前工作目录"""
    config = JCleanConfig()  # 没有 _config_file
    resolved = config.resolve_path('tasks')
    expected = str((Path.cwd() / 'tasks').resolve())
    assert resolved == expected


def test_find_config_file_current_dir(tmp_path):
    """在当前目录查找配置文件"""
    config_file = tmp_path / 'jclean.toml'
    config_file.write_text('[paths]', encoding='utf-8')
    
    found = find_config_file(start_dir=tmp_path)
    assert found == config_file.resolve()


def test_find_config_file_dotfile(tmp_path):
    """查找 .jclean.toml"""
    config_file = tmp_path / '.jclean.toml'
    config_file.write_text('[paths]', encoding='utf-8')
    
    found = find_config_file(start_dir=tmp_path)
    assert found == config_file.resolve()


def test_find_config_file_custom_path(tmp_path):
    """命令行指定配置文件路径"""
    config_file = tmp_path / 'custom.toml'
    config_file.write_text('[paths]', encoding='utf-8')
    
    found = find_config_file(custom_path=str(config_file))
    assert found == config_file.resolve()


def test_find_config_file_not_found(tmp_path):
    """找不到配置文件返回 None"""
    found = find_config_file(start_dir=tmp_path)
    assert found is None


def test_load_config_no_file(tmp_path):
    """没有配置文件时返回默认配置"""
    config = load_config()
    assert isinstance(config, JCleanConfig)
    assert config.tasks_root == 'tasks'


def test_load_config_from_file(tmp_path):
    """从配置文件加载"""
    config_file = tmp_path / 'jclean.toml'
    config_file.write_text('''
[paths]
tasks_root = "my_tasks"
vocabulary = "my_vocab.txt"

[defaults]
backup_before_merge = false
''', encoding='utf-8')
    
    config = load_config(custom_path=str(config_file))
    assert config.tasks_root == 'my_tasks'
    assert config.vocabulary == 'my_vocab.txt'
    assert config.backup_before_merge == False
    assert config._config_file == config_file.resolve()


def test_generate_sample_config(tmp_path):
    """生成示例配置文件"""
    output = tmp_path / 'test.toml'
    generate_sample_config(str(output))
    
    assert output.exists()
    content = output.read_text(encoding='utf-8')
    assert '[paths]' in content
    assert 'tasks_root' in content
    assert '[defaults]' in content
    assert '[logging]' in content


def test_config_priority_command_line_over_file(tmp_path):
    """命令行参数优先级高于配置文件"""
    # 这个测试在 CLI 层面验证，这里只测试配置加载
    config_file = tmp_path / 'jclean.toml'
    config_file.write_text('''
[paths]
tasks_root = "config_tasks"
vocabulary = "custom_vocab.txt"
''', encoding='utf-8')
    
    config = load_config(custom_path=str(config_file))
    
    # CLI 层面会覆盖这些值
    assert config.tasks_root == 'config_tasks'  # 从配置文件读取
    assert config.vocabulary == 'custom_vocab.txt'


def test_config_resolve_path_with_parent_dir(tmp_path):
    """解析包含 .. 的相对路径"""
    config_dir = tmp_path / 'subdir'
    config_dir.mkdir()
    config_file = config_dir / 'jclean.toml'
    config_file.write_text('[paths]', encoding='utf-8')
    
    config = JCleanConfig(_config_file=config_file)
    resolved = config.resolve_path('../data')
    expected = str((tmp_path / 'data').resolve())
    assert resolved == expected


def test_load_config_tolerates_bom(tmp_path):
    """带 UTF-8 BOM 的配置文件应能正常解析（记事本等编辑器会写入 BOM）"""
    config_file = tmp_path / 'jclean.toml'
    # utf-8-sig 会在文件头写入 BOM (EF BB BF)
    config_file.write_text('''[paths]
tasks_root = "bom_tasks"
vocabulary = "bom_vocab.txt"
''', encoding='utf-8-sig')

    # 确认文件确实带 BOM
    assert config_file.read_bytes()[:3] == b'\xef\xbb\xbf'

    config = load_config(custom_path=str(config_file))
    assert config.tasks_root == 'bom_tasks'
    assert config.vocabulary == 'bom_vocab.txt'