from loguru import logger

from magic_pdf.libs.boxbase import __is_overlaps_y_exceeds_threshold, get_minbox_if_overlap_by_ratio, \
    calculate_overlap_area_in_bbox1_area_ratio


# 删除重叠spans中较小的那些
def remove_overlaps_min_spans(spans):
    for span1 in spans.copy():
        for span2 in spans.copy():
            if span1 != span2:
                overlap_box = get_minbox_if_overlap_by_ratio(span1['bbox'], span2['bbox'], 0.5)
                if overlap_box is not None:
                    bbox_to_remove = next((span for span in spans if span['bbox'] == overlap_box), None)
                    if bbox_to_remove is not None:
                        spans.remove(bbox_to_remove)
    return spans


# 将每一个line中的span从左到右排序
def line_sort_spans_by_left_to_right(lines):
    line_objects = []
    for line in lines:
        # 按照x0坐标排序
        line.sort(key=lambda span: span['bbox'][0])
        line_bbox = [
            min(span['bbox'][0] for span in line),  # x0
            min(span['bbox'][1] for span in line),  # y0
            max(span['bbox'][2] for span in line),  # x1
            max(span['bbox'][3] for span in line),  # y1
        ]
        line_objects.append({
            "bbox": line_bbox,
            "spans": line,
        })
    return line_objects

def merge_spans_to_line(spans):
    # 按照y0坐标排序
    spans.sort(key=lambda span: span['bbox'][1])

    lines = []
    current_line = [spans[0]]
    for span in spans[1:]:
        # 如果当前的span类型为"displayed_equation" 或者 当前行中已经有"displayed_equation"
        # image和table类型，同上
        if span['type'] in ["displayed_equation", "image", "table"] or any(
                s['type'] in ["displayed_equation", "image", "table"] for s in current_line):
            # 则开始新行
            lines.append(current_line)
            current_line = [span]
            continue

        # 如果当前的span与当前行的最后一个span在y轴上重叠，则添加到当前行
        if __is_overlaps_y_exceeds_threshold(span['bbox'], current_line[-1]['bbox']):
            current_line.append(span)
        else:
            # 否则，开始新行
            lines.append(current_line)
            current_line = [span]

    # 添加最后一行
    if current_line:
        lines.append(current_line)

    return lines

def merge_spans_to_line_by_layout(spans, layout_bboxes):
    lines = []
    new_spans = []
    for item in layout_bboxes:
        layout_bbox = item['layout_bbox']
        # 遍历spans,将每个span放入对应的layout中
        layout_sapns = []
        for span in spans:
            if calculate_overlap_area_in_bbox1_area_ratio(span['bbox'], layout_bbox) > 0.8:
                layout_sapns.append(span)
        # 如果layout_sapns不为空，则放入new_spans中
        if len(layout_sapns) > 0:
            new_spans.append(layout_sapns)
            # 从spans删除已经放入layout_sapns中的span
            for layout_sapn in layout_sapns:
                spans.remove(layout_sapn)

    if len(new_spans) > 0:
        for layout_sapns in new_spans:
            layout_lines = merge_spans_to_line(layout_sapns)
            lines.extend(layout_lines)

    #对line中的span进行排序
    lines = line_sort_spans_by_left_to_right(lines)

    return lines
