"""
条件评估器单元测试

测试 ConditionEvaluator 类的所有功能
"""

import pytest
from loaders.yaml_loader import YAMLError
from core.condition_evaluator import ConditionEvaluator


class TestConditionEvaluator:
    """ConditionEvaluator 测试类"""

    def setup_method(self):
        """每个测试方法前执行"""
        self.evaluator = ConditionEvaluator()

    # ============= 比较运算符测试 =============

    def test_greater_than(self):
        """测试大于运算符"""
        assert self.evaluator.evaluate_condition("{count > 0}", {"count": 5}) is True
        assert self.evaluator.evaluate_condition("{count > 0}", {"count": 0}) is False

    def test_less_than(self):
        """测试小于运算符"""
        assert self.evaluator.evaluate_condition("{count < 10}", {"count": 5}) is True
        assert self.evaluator.evaluate_condition("{count < 10}", {"count": 10}) is False

    def test_greater_equal(self):
        """测试大于等于运算符"""
        assert self.evaluator.evaluate_condition("{count >= 5}", {"count": 5}) is True
        assert self.evaluator.evaluate_condition("{count >= 5}", {"count": 4}) is False

    def test_less_equal(self):
        """测试小于等于运算符"""
        assert self.evaluator.evaluate_condition("{count <= 5}", {"count": 5}) is True
        assert self.evaluator.evaluate_condition("{count <= 5}", {"count": 6}) is False

    def test_equal(self):
        """测试相等运算符"""
        assert self.evaluator.evaluate_condition("{status == 'active'}", {"status": "active"}) is True
        assert self.evaluator.evaluate_condition("{status == 'active'}", {"status": "inactive"}) is False

    def test_not_equal(self):
        """测试不等运算符"""
        assert self.evaluator.evaluate_condition("{status != 'inactive'}", {"status": "active"}) is True
        assert self.evaluator.evaluate_condition("{status != 'active'}", {"status": "active"}) is False

    # ============= 逻辑运算符测试 =============

    def test_logical_and(self):
        """测试逻辑与运算"""
        assert self.evaluator.evaluate_condition(
            "{count > 0 and status == 'active'}",
            {"count": 5, "status": "active"}
        ) is True
        assert self.evaluator.evaluate_condition(
            "{count > 0 and status == 'active'}",
            {"count": 0, "status": "active"}
        ) is False

    def test_logical_or(self):
        """测试逻辑或运算"""
        assert self.evaluator.evaluate_condition(
            "{count > 0 or status == 'active'}",
            {"count": 0, "status": "active"}
        ) is True
        assert self.evaluator.evaluate_condition(
            "{count > 0 or status == 'active'}",
            {"count": 0, "status": "inactive"}
        ) is False

    def test_logical_not(self):
        """测试逻辑非运算"""
        assert self.evaluator.evaluate_condition("{not (count == 0)}", {"count": 5}) is True
        assert self.evaluator.evaluate_condition("{not (count == 0)}", {"count": 0}) is False

    # ============= 成员测试 =============

    def test_in_list(self):
        """测试列表成员测试"""
        assert self.evaluator.evaluate_condition(
            "{status in ['draft', 'review', 'published']}",
            {"status": "draft"}
        ) is True
        assert self.evaluator.evaluate_condition(
            "{status in ['draft', 'review']}",
            {"status": "active"}
        ) is False

    def test_not_in_list(self):
        """测试列表非成员测试"""
        assert self.evaluator.evaluate_condition(
            "{status not in ['draft', 'review']}",
            {"status": "active"}
        ) is True
        assert self.evaluator.evaluate_condition(
            "{status not in ['draft', 'review']}",
            {"status": "draft"}
        ) is False

    def test_in_tuple(self):
        """测试元组成员测试"""
        assert self.evaluator.evaluate_condition(
            "{level in (1, 2, 3)}",
            {"level": 2}
        ) is True
        assert self.evaluator.evaluate_condition(
            "{level in (1, 2, 3)}",
            {"level": 4}
        ) is False

    def test_string_contains(self):
        """测试字符串包含"""
        assert self.evaluator.evaluate_condition(
            "{'test' in status}",
            {"status": "test-version"}
        ) is True
        assert self.evaluator.evaluate_condition(
            "{'test' in status}",
            {"status": "production"}
        ) is False

    # ============= 数学运算测试 =============

    def test_addition(self):
        """测试加法运算"""
        assert self.evaluator.evaluate_condition(
            "{(price + tax) > 100}",
            {"price": 90, "tax": 15}
        ) is True

    def test_multiplication(self):
        """测试乘法运算"""
        assert self.evaluator.evaluate_condition(
            "{(price * discount) > 50}",
            {"price": 100, "discount": 0.8}
        ) is True

    def test_division(self):
        """测试除法运算"""
        assert self.evaluator.evaluate_condition(
            "{(total / count) >= 10}",
            {"total": 100, "count": 5}
        ) is True

    def test_modulo(self):
        """测试取模运算"""
        assert self.evaluator.evaluate_condition(
            "{(value % 2) == 0}",
            {"value": 10}
        ) is True

    def test_power(self):
        """测试幂运算"""
        assert self.evaluator.evaluate_condition(
            "{(base ** exp) > 100}",
            {"base": 10, "exp": 2}
        ) is False

    # ============= 内置函数测试 =============

    def test_int_function(self):
        """测试 int() 函数"""
        assert self.evaluator.evaluate_condition(
            "{int(value) > 100}",
            {"value": "150"}
        ) is True

    def test_float_function(self):
        """测试 float() 函数"""
        assert self.evaluator.evaluate_condition(
            "{float(value) > 3.14}",
            {"value": "3.5"}
        ) is True

    def test_str_function(self):
        """测试 str() 函数"""
        assert self.evaluator.evaluate_condition(
            "{str(value) == '123'}",
            {"value": 123}
        ) is True

    def test_len_function(self):
        """测试 len() 函数"""
        assert self.evaluator.evaluate_condition(
            "{len(items) > 0}",
            {"items": [1, 2, 3]}
        ) is True

    def test_bool_function(self):
        """测试 bool() 函数"""
        assert self.evaluator.evaluate_condition(
            "{bool(value)}",
            {"value": "text"}
        ) is True
        assert self.evaluator.evaluate_condition(
            "{bool(value)}",
            {"value": ""}
        ) is False

    def test_abs_function(self):
        """测试 abs() 函数"""
        assert self.evaluator.evaluate_condition(
            "{abs(value) > 10}",
            {"value": -15}
        ) is True

    def test_min_function(self):
        """测试 min() 函数"""
        assert self.evaluator.evaluate_condition(
            "{min(a, b) == 5}",
            {"a": 5, "b": 10}
        ) is True

    def test_max_function(self):
        """测试 max() 函数"""
        assert self.evaluator.evaluate_condition(
            "{max(a, b) == 10}",
            {"a": 5, "b": 10}
        ) is True

    # ============= 复杂逻辑组合测试 =============

    def test_complex_logic_combination(self):
        """测试复杂逻辑组合"""
        assert self.evaluator.evaluate_condition(
            "{(score >= 60 and score <= 100) or is_admin}",
            {"score": 75, "is_admin": False}
        ) is True

    def test_nested_conditions(self):
        """测试嵌套条件"""
        assert self.evaluator.evaluate_condition(
            "{((count > 0) and (status == 'active')) or (is_admin and (level >= 3))}",
            {"count": 5, "status": "active", "is_admin": False, "level": 1}
        ) is True

    # ============= 错误处理测试 =============

    def test_undefined_variable_error(self):
        """测试变量未定义错误"""
        with pytest.raises(YAMLError, match="条件表达式中的变量未定义"):
            self.evaluator.evaluate_condition("{undefined_var > 0}", {"count": 5})

    def test_undefined_function_error(self):
        """测试函数未定义错误"""
        with pytest.raises(YAMLError, match="条件表达式中使用了不支持的函数"):
            self.evaluator.evaluate_condition("{custom_func(value)}", {"value": 5})

    def test_syntax_error(self):
        """测试语法错误"""
        with pytest.raises(YAMLError, match="条件表达式语法错误"):
            self.evaluator.evaluate_condition("{count > }", {"count": 5})

    # ============= 安全限制测试 =============

    def test_expression_too_long(self):
        """测试表达式过长"""
        long_expr = "{" + "x " * 300 + "}"
        with pytest.raises(YAMLError, match="条件表达式过长"):
            self.evaluator.evaluate_condition(long_expr, {"x": 1})

    def test_attribute_access_forbidden(self):
        """测试禁止属性访问"""
        with pytest.raises(YAMLError, match="条件表达式使用了不支持的语法特性"):
            self.evaluator.evaluate_condition("{obj.attr}", {"obj": object()})

    # ============= 表达式提取测试 =============

    def test_extract_expression_with_braces(self):
        """测试提取带花括号的表达式"""
        expr = self.evaluator._extract_expression("{count > 0}")
        assert expr == "count > 0"

    def test_extract_expression_with_whitespace(self):
        """测试提取带空白的表达式"""
        expr = self.evaluator._extract_expression("{  count > 0  }")
        assert expr == "count > 0"

    def test_extract_expression_without_braces(self):
        """测试提取不带花括号的表达式"""
        expr = self.evaluator._extract_expression("count > 0")
        assert expr == "count > 0"

    # ============= 向后兼容测试 =============

    def test_backward_compatible_simple_expression(self):
        """测试向后兼容的简单表达式"""
        assert self.evaluator.evaluate_condition(
            "{subtitle != ''}",
            {"subtitle": "Hello"}
        ) is True
        assert self.evaluator.evaluate_condition(
            "{subtitle != ''}",
            {"subtitle": ""}
        ) is False