"""
单元测试：图片配置验证器

测试 validators/image_config.py 中的验证函数。
"""

import pytest
from validators.image_config import (
    validate_fit_value,
    validate_background_color,
    validate_dpi_value,
)


class TestValidateFitValue:
    """测试 fit 值验证"""

    def test_valid_fit_values(self):
        """测试有效的 fit 值"""
        assert validate_fit_value("stretch") == []
        assert validate_fit_value("contain") == []
        assert validate_fit_value("cover") == []
        assert validate_fit_value("center") == []

    def test_none_fit_value(self):
        """测试 None 值（默认）"""
        # None 是无效的，应该返回错误
        issues = validate_fit_value(None)
        assert len(issues) > 0

    def test_invalid_fit_value(self):
        """测试无效的 fit 值"""
        issues = validate_fit_value("invalid")
        assert len(issues) > 0
        assert issues[0].level == "ERROR"

        issues = validate_fit_value("fill")
        assert len(issues) > 0

        issues = validate_fit_value("scale")
        assert len(issues) > 0

    def test_case_sensitive(self):
        """测试大小写敏感"""
        issues = validate_fit_value("STRETCH")
        assert len(issues) > 0

        issues = validate_fit_value("Contain")
        assert len(issues) > 0


class TestValidateBackgroundColor:
    """测试背景色验证"""

    def test_valid_hex_colors(self):
        """测试有效的十六进制颜色"""
        assert validate_background_color("#ffffff") == []
        assert validate_background_color("#000000") == []
        assert validate_background_color("#ff0000") == []
        assert validate_background_color("#4a90e2") == []

    def test_valid_short_hex_colors(self):
        """测试有效的短格式十六进制颜色"""
        assert validate_background_color("#fff") == []
        assert validate_background_color("#000") == []
        assert validate_background_color("#f00") == []

    def test_none_background(self):
        """测试 None 值（透明）"""
        # None 会导致 TypeError，应该返回错误
        issues = validate_background_color(None)
        assert len(issues) > 0

    def test_invalid_colors(self):
        """测试无效的颜色格式"""
        issues = validate_background_color("white")
        assert len(issues) > 0

        issues = validate_background_color("rgb(255,255,255)")
        assert len(issues) > 0

        issues = validate_background_color("#gggggg")
        assert len(issues) > 0

        issues = validate_background_color("#ff")
        assert len(issues) > 0

        issues = validate_background_color("ffffff")
        assert len(issues) > 0


class TestValidateDpiValue:
    """测试 DPI 值验证"""

    def test_valid_dpi_values(self):
        """测试有效的 DPI 值"""
        assert validate_dpi_value(72) == []
        assert validate_dpi_value(96) == []
        assert validate_dpi_value(150) == []
        assert validate_dpi_value(300) == []

    def test_boundary_dpi_values(self):
        """测试边界 DPI 值"""
        # 1 和 1200 超出建议范围，会返回 WARNING
        issues = validate_dpi_value(1)
        assert len(issues) > 0
        assert issues[0].level == "WARNING"

        issues = validate_dpi_value(1200)
        assert len(issues) > 0
        assert issues[0].level == "WARNING"

    def test_invalid_dpi_values(self):
        """测试无效的 DPI 值"""
        # 0 和负数会返回 WARNING
        issues = validate_dpi_value(0)
        assert len(issues) > 0

        issues = validate_dpi_value(-1)
        assert len(issues) > 0

        issues = validate_dpi_value(1201)
        assert len(issues) > 0

        issues = validate_dpi_value(2000)
        assert len(issues) > 0

    def test_non_integer_dpi(self):
        """测试非整数 DPI 值"""
        # 浮点数 DPI 可能被接受（取决于实现）
        # 字符串和 None 应该返回错误
        issues = validate_dpi_value("96")
        assert len(issues) > 0

        issues = validate_dpi_value(None)
        assert len(issues) > 0