import openpyxl
from openpyxl.styles import Font

class ExcelHelper:
    def __init__(self, data):
        """
        初始化 ExcelHelper 实例
        :param data: 包含多个数组的列表，每个数组包含字典，每个字典有 'title' 和 'content' 键
        """
        self.data = data
        self.workbook = openpyxl.Workbook()
        self.sheet = self.workbook.active

    def create_excel(self, filename):
        """
        创建 Excel 文件并保存
        :param filename: 保存的文件名
        """
        start_row = 1
        for array in self.data:
            col = 1
            for item in array:
                self.sheet.cell(row=start_row, column=col, value=item['title']).font = Font(bold=True)
                self.sheet.cell(row=start_row + 1, column=col, value=item['content'])
                col += 1
            # 在每个数组之间添加两行空行
            start_row += 3

        self.workbook.save(filename)
        print(f"Excel 文件已保存为 {filename}")


    def extract_columns(self, filename, columns_to_extract, new_filename):
        """
        Extracts specified columns from an existing Excel file and saves them to a new file.
        :param filename: The source Excel file name.
        :param columns_to_extract: A list of column indices (1-based) to extract.
        :param new_filename: The name of the new Excel file to save the extracted columns.
        """
        # Load the source workbook
        source_wb = openpyxl.load_workbook(filename)
        source_sheet = source_wb.active

        # Create a new workbook and sheet
        new_wb = openpyxl.Workbook()
        new_sheet = new_wb.active

        # Copy headers
        for col_idx in columns_to_extract:
            new_sheet.cell(row=1, column=columns_to_extract.index(col_idx) + 1, value=source_sheet.cell(row=1, column=col_idx).value)

        # Copy data
        for row_idx, row in enumerate(source_sheet.iter_rows(min_row=2), start=2):
            for col_idx in columns_to_extract:
                new_sheet.cell(row=row_idx, column=columns_to_extract.index(col_idx) + 1, value=source_sheet.cell(row=row_idx, column=col_idx).value)

        # Save the new workbook
        new_wb.save(new_filename)
        print(f"Extracted columns saved to {new_filename}")




# # 示例数据
# data = [
#     [
#         {'title': 'Title 1', 'content': 'Content 1'},
#         {'title': 'Title 2', 'content': 'Content 2'},
#         {'title': 'Title 3', 'content': 'Content 3'}
#     ],
#     [
#         {'title': 'Title 4', 'content': 'Content 4'},
#         {'title': 'Title 5', 'content': 'Content 5'},
#         {'title': 'Title 6', 'content': 'Content 6'}
#     ]
# ]

# # 创建 ExcelHelper 实例并生成 Excel 文件
# excel_helper = ExcelHelper(data)
# excel_helper.create_excel('output.xlsx')