"""测试缩放特效"""

import pytest
from entity.effects.zoom import ZoomEffect
from tests.utils.test_helpers import EffectTestHelper, FFmpegValidator


class TestZoomEffect:
    """测试缩放特效处理器"""

    def test_validate_params_valid_cases(self):
        """测试有效参数验证"""
        test_cases = [
            {"params": "0,2.0,3.0", "expected": True, "description": "标准缩放参数"},
            {
                "params": "1.5,1.5,0",
                "expected": True,
                "description": "静态缩放（duration=0）",
            },
            {
                "params": "0,1.0,5.0",
                "expected": True,
                "description": "无缩放效果（factor=1.0）",
            },
            {"params": "10,0.5,2.0", "expected": True, "description": "缩小效果"},
        ]

        effect = ZoomEffect()
        results = EffectTestHelper.test_effect_params_validation(effect, test_cases)

        for result in results:
            assert result["passed"], f"Failed case: {result['description']} - {result}"

    def test_validate_params_invalid_cases(self):
        """测试无效参数验证"""
        test_cases = [
            {"params": "", "expected": False, "description": "空参数"},
            {"params": "1,2", "expected": False, "description": "参数不足"},
            {"params": "-1,2.0,3.0", "expected": False, "description": "负开始时间"},
            {"params": "0,0,3.0", "expected": False, "description": "零缩放因子"},
            {"params": "0,-2.0,3.0", "expected": False, "description": "负缩放因子"},
            {"params": "0,2.0,-1.0", "expected": False, "description": "负持续时间"},
            {"params": "abc,2.0,3.0", "expected": False, "description": "非数字参数"},
        ]

        effect = ZoomEffect()
        results = EffectTestHelper.test_effect_params_validation(effect, test_cases)

        for result in results:
            assert result["passed"], f"Failed case: {result['description']} - {result}"

    def test_generate_filter_args_static_zoom(self):
        """测试静态缩放滤镜生成"""
        effect = ZoomEffect("0,2.0,0")  # duration=0表示静态缩放
        result = EffectTestHelper.test_filter_generation(effect, "[0:v]", 1)

        assert result["success"], f"Filter generation failed: {result.get('error')}"
        assert result["filter_count"] == 1
        assert result["valid_syntax"]
        assert result["output_stream"] == "[v_eff1]"

        # 检查滤镜内容
        filter_str = result["filters"][0]
        assert "trim=start=0" in filter_str
        assert "zoompan=z=2.0" in filter_str
        assert "[v_eff1]" in filter_str

    def test_generate_filter_args_dynamic_zoom(self):
        """测试动态缩放滤镜生成"""
        effect = ZoomEffect("1.0,1.5,2.0")  # 从1秒开始，持续2秒的1.5倍缩放
        result = EffectTestHelper.test_filter_generation(effect, "[0:v]", 2)

        assert result["success"], f"Filter generation failed: {result.get('error')}"
        assert result["filter_count"] == 1
        assert result["valid_syntax"]
        assert result["output_stream"] == "[v_eff2]"

        # 检查滤镜内容
        filter_str = result["filters"][0]
        assert "zoompan=z=" in filter_str
        assert "between(t\\\\,1.0\\\\,3.0)" in filter_str  # 检查时间范围
        assert "[v_eff2]" in filter_str

    def test_generate_filter_args_no_zoom(self):
        """测试无缩放效果（factor=1.0）"""
        effect = ZoomEffect("0,1.0,3.0")  # 缩放因子为1.0，应该不生成滤镜
        result = EffectTestHelper.test_filter_generation(effect, "[0:v]", 1)

        assert result["success"]
        assert result["filter_count"] == 0
        assert result["output_stream"] == "[0:v]"  # 输出应该等于输入

    def test_generate_filter_args_invalid_params(self):
        """测试无效参数的滤镜生成"""
        effect = ZoomEffect("invalid,params")
        result = EffectTestHelper.test_filter_generation(effect, "[0:v]", 1)

        assert result["success"]
        assert result["filter_count"] == 0
        assert result["output_stream"] == "[0:v]"  # 无效参数时应该返回原输入

    def test_get_zoom_center_default(self):
        """测试默认缩放中心点"""
        effect = ZoomEffect("0,2.0,3.0")
        center_x, center_y = effect._get_zoom_center()

        assert center_x == "iw/2"
        assert center_y == "ih/2"

    def test_get_zoom_center_with_pos_json(self):
        """测试基于posJson的缩放中心点"""
        ext_data = {
            "posJson": '{"ltX": 100, "ltY": 100, "rbX": 200, "rbY": 200, "imgWidth": 400, "imgHeight": 300}'
        }
        effect = ZoomEffect("0,2.0,3.0", ext_data)
        center_x, center_y = effect._get_zoom_center()

        # 中心点应该是矩形的中心
        # center_x_ratio = (100 + 200) / (2 * 400) = 0.375
        # center_y_ratio = (100 + 200) / (2 * 300) = 0.5
        assert "iw*0.375" in center_x
        assert "ih*0.5" in center_y

    def test_get_zoom_center_invalid_pos_json(self):
        """测试无效posJson时的缩放中心点"""
        ext_data = {"posJson": '{"imgWidth": 0, "imgHeight": 0}'}  # 无效尺寸
        effect = ZoomEffect("0,2.0,3.0", ext_data)
        center_x, center_y = effect._get_zoom_center()

        # 应该回退到默认中心点
        assert center_x == "iw/2"
        assert center_y == "ih/2"

    def test_get_effect_name(self):
        """测试获取特效名称"""
        effect = ZoomEffect()
        assert effect.get_effect_name() == "zoom"

    def test_complex_zoom_scenario(self):
        """测试复杂缩放场景"""
        # 带有复杂posJson数据的动态缩放
        ext_data = {
            "posJson": '{"ltX": 50, "ltY": 75, "rbX": 350, "rbY": 225, "imgWidth": 400, "imgHeight": 300}'
        }
        effect = ZoomEffect("2.5,3.0,1.5", ext_data)
        result = EffectTestHelper.test_filter_generation(effect, "[input]", 5)

        assert result["success"]
        assert result["filter_count"] == 1
        assert result["valid_syntax"]
        assert result["output_stream"] == "[v_eff5]"

        filter_str = result["filters"][0]
        assert "zoompan=z=" in filter_str
        assert "between(t\\\\,2.5\\\\,4.0)" in filter_str  # 2.5 + 1.5 = 4.0
        assert "[input]" in filter_str
        assert "[v_eff5]" in filter_str