# ==========================================
# 3. PPT 通用工具 (PPT Utilities)
# ==========================================
import os

from utils.font_utils import is_font_available


def replace_text_in_slide(prs, slide_index, placeholder, text):
    """在指定幻灯片中替换指定占位符的文本，并保持原有格式"""
    slide = prs.slides[slide_index]
    for shape in slide.shapes:
        if shape.name == placeholder:
            if not shape.has_text_frame:
                continue

            # 1. 保存原有格式
            original_paragraph_formats = []
            for paragraph in shape.text_frame.paragraphs:
                paragraph_format = {
                    'alignment': paragraph.alignment,
                    'space_before': getattr(paragraph, 'space_before', None),
                    'space_after': getattr(paragraph, 'space_after', None),
                    'line_spacing': getattr(paragraph, 'line_spacing', None),
                    'left_indent': getattr(paragraph, 'left_indent', None),
                    'right_indent': getattr(paragraph, 'right_indent', None),
                    'first_line_indent': getattr(paragraph, 'first_line_indent', None),
                    'font_info': []
                }
                for run in paragraph.runs:
                    run_format = {
                        'font_name': run.font.name,
                        'font_size': run.font.size,
                        'bold': run.font.bold,
                        'italic': run.font.italic,
                        'underline': run.font.underline,
                        'color': run.font.color,
                        'character_space': getattr(run.font, 'space', None),
                        'all_caps': getattr(run.font, 'all_caps', None),
                        'small_caps': getattr(run.font, 'small_caps', None)
                    }
                    paragraph_format['font_info'].append(run_format)
                original_paragraph_formats.append(paragraph_format)

            # 2. 设置新文本
            shape.text = str(text)  # 确保是字符串

            # 3. 恢复格式
            for i, paragraph in enumerate(shape.text_frame.paragraphs):
                orig_idx = i if i < len(original_paragraph_formats) else -1
                if not original_paragraph_formats: break

                original_para = original_paragraph_formats[orig_idx]

                # 恢复段落属性
                for attr in ['alignment', 'space_before', 'space_after', 'line_spacing',
                             'left_indent', 'right_indent', 'first_line_indent']:
                    if original_para[attr] is not None:
                        setattr(paragraph, attr, original_para[attr])

                # 恢复字体属性
                for j, run in enumerate(paragraph.runs):
                    font_idx = j if j < len(original_para['font_info']) else 0
                    if not original_para['font_info']: break

                    original_font = original_para['font_info'][font_idx]

                    # 字体名称检查与回退
                    if original_font['font_name']:
                        if is_font_available(original_font['font_name']):
                            run.font.name = original_font['font_name']
                        else:
                            run.font.name = "微软雅黑"

                    # 恢复其他字体属性
                    if original_font['font_size']: run.font.size = original_font['font_size']
                    if original_font['bold']: run.font.bold = original_font['bold']
                    if original_font['italic']: run.font.italic = original_font['italic']
                    if original_font['underline']: run.font.underline = original_font['underline']
                    if original_font['all_caps']: run.font.all_caps = original_font['all_caps']

                    if original_font['character_space']:
                        try:
                            run.font.space = original_font['character_space']
                        except:
                            pass

                    if original_font['color']:
                        try:
                            if hasattr(original_font['color'], 'rgb'):
                                run.font.color.rgb = original_font['color'].rgb
                        except:
                            pass


def replace_picture(prs, slide_index, placeholder, img_path):
    """在指定幻灯片中替换指定占位符的图片"""
    if not os.path.exists(img_path):
        print(f"警告: 图片路径不存在 {img_path}")
        return

    slide = prs.slides[slide_index]
    sp_tree = slide.shapes._spTree

    for i, shape in enumerate(slide.shapes):
        if shape.name == placeholder:
            left, top, width, height = shape.left, shape.top, shape.width, shape.height
            sp_tree.remove(shape._element)
            new_shape = slide.shapes.add_picture(img_path, left, top, width, height)
            sp_tree.insert(i, new_shape._element)
            break