"""
元素类单元测试

测试 TextElement、ImageElement、ShapeElement、TableElement 和 create_element 工厂函数
"""

import pytest
from core.elements import (
    TextElement, ImageElement, ShapeElement, TableElement,
    create_element, _is_valid_color
)
from validators.result import ValidationIssue


# ============= TextElement 测试 =============

class TestTextElement:
    """TextElement 测试类"""

    def test_create_with_defaults(self):
        """测试使用默认值创建 TextElement"""
        elem = TextElement()
        assert elem.type == 'text'
        assert elem.content == ''
        assert elem.box == [1, 1, 8, 1]
        assert elem.font == {}

    def test_create_with_values(self):
        """测试使用指定值创建 TextElement"""
        elem = TextElement(
            content="Test",
            box=[0, 0, 5, 1],
            font={"size": 24, "bold": True}
        )
        assert elem.content == "Test"
        assert elem.box == [0, 0, 5, 1]
        assert elem.font["size"] == 24
        assert elem.font["bold"] is True

    def test_box_must_be_list_of_four(self):
        """测试 box 必须是包含 4 个数字的列表"""
        with pytest.raises(ValueError, match="box 必须是包含 4 个数字的列表"):
            TextElement(box=[1, 2, 3])  # 只有 3 个元素

        with pytest.raises(ValueError, match="box 必须是包含 4 个数字的列表"):
            TextElement(box="not a list")

    def test_validate_invalid_color(self):
        """测试无效颜色格式验证"""
        elem = TextElement(
            font={"color": "red"}  # 无效格式
        )
        issues = elem.validate()
        assert len(issues) == 1
        assert issues[0].level == "ERROR"
        assert issues[0].code == "INVALID_COLOR_FORMAT"

    def test_validate_font_too_small(self):
        """测试字体太小警告"""
        elem = TextElement(font={"size": 6})
        issues = elem.validate()
        assert len(issues) == 1
        assert issues[0].level == "WARNING"
        assert issues[0].code == "FONT_TOO_SMALL"

    def test_validate_font_too_large(self):
        """测试字体太大警告"""
        elem = TextElement(font={"size": 120})
        issues = elem.validate()
        assert len(issues) == 1
        assert issues[0].level == "WARNING"
        assert issues[0].code == "FONT_TOO_LARGE"

    def test_validate_valid_font_size(self):
        """测试有效字体大小不产生警告"""
        elem = TextElement(font={"size": 18})
        issues = elem.validate()
        assert len(issues) == 0


# ============= ImageElement 测试 =============

class TestImageElement:
    """ImageElement 测试类"""

    def test_create_with_defaults(self):
        """测试使用默认值创建 ImageElement"""
        elem = ImageElement(src="test.png")
        assert elem.type == 'image'
        assert elem.src == "test.png"
        assert elem.box == [1, 1, 4, 3]
        assert elem.fit is None
        assert elem.background is None

    def test_create_with_fit_and_background(self):
        """测试创建带 fit 和 background 的 ImageElement"""
        elem = ImageElement(
            src="test.png",
            box=[1, 1, 4, 3],
            fit="contain",
            background="#ffffff"
        )
        assert elem.fit == "contain"
        assert elem.background == "#ffffff"

    def test_empty_src_raises_error(self):
        """测试空 src 会引发错误"""
        with pytest.raises(ValueError, match="图片元素必须指定 src"):
            ImageElement(src="")

    def test_box_must_be_list_of_four(self):
        """测试 box 必须是包含 4 个数字的列表"""
        with pytest.raises(ValueError, match="box 必须是包含 4 个数字的列表"):
            ImageElement(src="test.png", box=[1, 2, 3])

    def test_validate_returns_empty_list(self):
        """测试 ImageElement.validate() 返回空列表"""
        elem = ImageElement(src="test.png")
        issues = elem.validate()
        assert issues == []


# ============= ShapeElement 测试 =============

class TestShapeElement:
    """ShapeElement 测试类"""

    def test_create_with_defaults(self):
        """测试使用默认值创建 ShapeElement"""
        elem = ShapeElement()
        assert elem.type == 'shape'
        assert elem.shape == 'rectangle'
        assert elem.box == [1, 1, 2, 1]
        assert elem.fill is None
        assert elem.line is None

    def test_box_must_be_list_of_four(self):
        """测试 box 必须是包含 4 个数字的列表"""
        with pytest.raises(ValueError, match="box 必须是包含 4 个数字的列表"):
            ShapeElement(box=[1, 2, 3])

    def test_validate_invalid_shape_type(self):
        """测试无效形状类型"""
        elem = ShapeElement(shape="triangle")
        issues = elem.validate()
        assert len(issues) == 1
        assert issues[0].level == "ERROR"
        assert issues[0].code == "INVALID_SHAPE_TYPE"
        assert "triangle" in issues[0].message

    def test_validate_valid_shape_types(self):
        """测试有效的形状类型"""
        for shape_type in ['rectangle', 'ellipse', 'rounded_rectangle']:
            elem = ShapeElement(shape=shape_type)
            issues = elem.validate()
            assert len(issues) == 0

    def test_validate_invalid_fill_color(self):
        """测试无效填充颜色"""
        elem = ShapeElement(fill="red")
        issues = elem.validate()
        assert len(issues) == 1
        assert issues[0].code == "INVALID_COLOR_FORMAT"

    def test_validate_invalid_line_color(self):
        """测试无效线条颜色"""
        elem = ShapeElement(line={"color": "blue"})
        issues = elem.validate()
        assert len(issues) == 1
        assert issues[0].code == "INVALID_COLOR_FORMAT"

    def test_validate_valid_colors(self):
        """测试有效的颜色"""
        elem = ShapeElement(
            fill="#4a90e2",
            line={"color": "#000000", "width": 2}
        )
        issues = elem.validate()
        assert len(issues) == 0


# ============= TableElement 测试 =============

class TestTableElement:
    """TableElement 测试类"""

    def test_create_with_defaults(self):
        """测试使用默认值创建 TableElement"""
        elem = TableElement(data=[["A", "B"]])
        assert elem.type == 'table'
        assert elem.data == [["A", "B"]]
        assert elem.position == [1, 1]
        assert elem.col_widths == []
        assert elem.style == {}

    def test_empty_data_raises_error(self):
        """测试空数据会引发错误"""
        with pytest.raises(ValueError, match="表格数据不能为空"):
            TableElement(data=[])

    def test_position_must_be_list_of_two(self):
        """测试 position 必须是包含 2 个数字的列表"""
        with pytest.raises(ValueError, match="position 必须是包含 2 个数字的列表"):
            TableElement(data=[["A"]], position=[1])

    def test_validate_inconsistent_columns(self):
        """测试行列数不一致"""
        elem = TableElement(data=[
            ["A", "B", "C"],
            ["X", "Y"],  # 只有 2 列
            ["1", "2", "3"]
        ])
        issues = elem.validate()
        assert len(issues) == 1
        assert issues[0].level == "ERROR"
        assert issues[0].code == "TABLE_INCONSISTENT_COLUMNS"

    def test_validate_col_widths_mismatch(self):
        """测试 col_widths 与列数不匹配"""
        elem = TableElement(
            data=[["A", "B"], ["C", "D"]],
            col_widths=[1, 2, 3]  # 3 列但数据只有 2 列
        )
        issues = elem.validate()
        assert len(issues) == 1
        assert issues[0].level == "WARNING"
        assert issues[0].code == "TABLE_COL_WIDTHS_MISMATCH"

    def test_validate_consistent_table(self):
        """测试一致的表格数据"""
        elem = TableElement(
            data=[["A", "B"], ["C", "D"]],
            col_widths=[2, 2]
        )
        issues = elem.validate()
        assert len(issues) == 0


# ============= create_element 工厂函数测试 =============

class TestCreateElement:
    """create_element 工厂函数测试类"""

    def test_create_text_element(self):
        """测试创建文本元素"""
        elem = create_element({"type": "text", "content": "Test"})
        assert isinstance(elem, TextElement)
        assert elem.content == "Test"

    def test_create_image_element(self):
        """测试创建图片元素"""
        elem = create_element({"type": "image", "src": "test.png"})
        assert isinstance(elem, ImageElement)
        assert elem.src == "test.png"

    def test_create_shape_element(self):
        """测试创建形状元素"""
        elem = create_element({"type": "shape", "shape": "ellipse"})
        assert isinstance(elem, ShapeElement)
        assert elem.shape == "ellipse"

    def test_create_table_element(self):
        """测试创建表格元素"""
        elem = create_element({"type": "table", "data": [["A", "B"]]})
        assert isinstance(elem, TableElement)
        assert elem.data == [["A", "B"]]

    def test_unsupported_type_raises_error(self):
        """测试不支持的元素类型"""
        with pytest.raises(ValueError, match="不支持的元素类型"):
            create_element({"type": "video"})

    def test_missing_type_raises_error(self):
        """测试缺少 type 字段"""
        with pytest.raises(ValueError, match="不支持的元素类型"):
            create_element({"content": "Test"})


# ============= _is_valid_color 工具函数测试 =============

class TestIsValidColor:
    """_is_valid_color 工具函数测试类"""

    def test_valid_full_hex_color(self):
        """测试完整的 #RRGGBB 格式"""
        assert _is_valid_color("#ffffff") is True
        assert _is_valid_color("#000000") is True
        assert _is_valid_color("#4a90e2") is True
        assert _is_valid_color("#FF0000") is True

    def test_valid_short_hex_color(self):
        """测试短格式 #RGB"""
        assert _is_valid_color("#fff") is True
        assert _is_valid_color("#000") is True
        assert _is_valid_color("#abc") is True

    def test_invalid_colors(self):
        """测试无效颜色"""
        assert _is_valid_color("red") is False
        assert _is_valid_color("#gggggg") is False
        assert _is_valid_color("ffffff") is False  # 缺少 #
        assert _is_valid_color("#ffff") is False  # 4 位
        assert _is_valid_color("#fffff") is False  # 5 位
        assert _is_valid_color("") is False


# ============= 边界情况补充测试 =============

class TestTextElementBoundaryCases:
    """TextElement 边界情况测试"""

    def test_text_with_very_long_content(self):
        """测试非常长的文本内容"""
        long_content = "A" * 1000
        elem = TextElement(
            content=long_content,
            box=[0, 0, 5, 1],
            font={"size": 12}
        )
        assert elem.content == long_content

    def test_text_with_newline_characters(self):
        """测试包含换行符的文本"""
        elem = TextElement(
            content="Line 1\nLine 2\nLine 3",
            box=[0, 0, 5, 2],
            font={}
        )
        assert "\n" in elem.content

    def test_text_with_tab_characters(self):
        """测试包含制表符的文本"""
        elem = TextElement(
            content="Col1\tCol2\tCol3",
            box=[0, 0, 5, 1],
            font={}
        )
        assert "\t" in elem.content

    def test_text_empty_font_size(self):
        """测试空字体大小"""
        elem = TextElement(
            content="Test",
            box=[0, 0, 1, 1],
            font={}
        )
        # 默认值应该有效
        assert "size" not in elem.font

    def test_text_with_color_variations(self):
        """测试不同颜色格式"""
        # 短格式应该被 _is_valid_color 接受，但元素也接受
        valid_colors = ["#fff", "#FFF", "#000", "#abc", "#ABC"]
        for color in valid_colors:
            elem = TextElement(
                content="Test",
                box=[0, 0, 1, 1],
                font={"color": color}
            )
            assert elem.font["color"] == color


class TestTableElementBoundaryCases:
    """TableElement 边界情况测试"""

    def test_table_with_single_cell(self):
        """测试单单元格表格"""
        elem = TableElement(
            data=[["Single Cell"]],
            position=[0, 0]
        )
        assert len(elem.data) == 1
        assert len(elem.data[0]) == 1

    def test_table_with_many_columns(self):
        """测试多列表格"""
        many_cols = ["Col" + str(i) for i in range(20)]
        elem = TableElement(
            data=[many_cols],
            position=[0, 0],
            col_widths=[1] * 20
        )
        assert len(elem.data[0]) == 20

    def test_table_with_single_row(self):
        """测试单行表格"""
        elem = TableElement(
            data=[["A", "B", "C"]],
            position=[0, 0]
        )
        assert len(elem.data) == 1

    def test_table_with_many_rows(self):
        """测试多行表格"""
        many_rows = [["Row" + str(i)] * 3 for i in range(50)]
        elem = TableElement(
            data=many_rows,
            position=[0, 0],
            col_widths=[1, 1, 1]
        )
        assert len(elem.data) == 50


class TestShapeElementBoundaryCases:
    """ShapeElement 边界情况测试"""

    def test_shape_without_line_attribute(self):
        """测试无边框的形状"""
        elem = ShapeElement(
            box=[1, 1, 2, 1],
            shape="rectangle",
            fill="#000000",
            line=None
        )
        assert elem.line is None

    def test_shape_with_empty_line(self):
        """测试空 line 字典"""
        elem = ShapeElement(
            box=[1, 1, 2, 1],
            shape="rectangle",
            fill="#000000",
            line={}
        )
        assert elem.line == {}

    def test_shape_all_shape_types(self):
        """测试所有支持的形状类型"""
        shapes = ["rectangle", "ellipse", "rounded_rectangle"]
        for shape_type in shapes:
            elem = ShapeElement(
                box=[1, 1, 1, 1],
                shape=shape_type,
                fill="#000000"
            )
            assert elem.shape == shape_type


class TestImageElementBoundaryCases:
    """ImageElement 边界情况测试"""

    def test_image_with_relative_path(self):
        """测试相对路径"""
        elem = ImageElement(
            box=[0, 0, 1, 1],
            src="images/test.png"
        )
        assert "images/test.png" == elem.src

    def test_image_with_absolute_path(self):
        """测试绝对路径"""
        elem = ImageElement(
            box=[0, 0, 1, 1],
            src="/absolute/path/image.png"
        )
        assert elem.src == "/absolute/path/image.png"

    def test_image_with_windows_path(self):
        """测试 Windows 路径"""
        elem = ImageElement(
            box=[0, 0, 1, 1],
            src="C:\\Images\\test.png"
        )
        assert elem.src == "C:\\Images\\test.png"

    def test_image_with_special_characters_in_filename(self):
        """测试文件名包含特殊字符"""
        special_names = [
            "image with spaces.png",
            "image-with-dashes.png",
            "image_with_underscores.png",
            "image.with.dots.png"
        ]
        for name in special_names:
            elem = ImageElement(
                box=[0, 0, 1, 1],
                src=name
            )
            assert elem.src == name