import os
from collections import defaultdict

def count_part_frequencies(ldr_content):
    """
    精确统计.ldr文件中零件使用频率（基于1开头的行）
    
    参数:
        ldr_content: .ldr文件的内容字符串
    
    返回:
        defaultdict: 零件文件名 -> 出现次数
    """
    freq = defaultdict(int)
    for line in ldr_content.splitlines():
        line = line.strip()
        if line.startswith('1 '):
            parts = line.split()
            if len(parts) >= 15:  # 确保是完整的零件定义行
                part_filename = parts[-1].lower()  # 统一小写处理
                freq[part_filename] += 1
    return freq

def build_frequency_index(folder_path):
    """
    为文件夹中的所有.ldr文件建立频率索引
    
    参数:
        folder_path: 文件夹路径
    
    返回:
        dict: {文件名: 频率字典}
    """
    freq_index = {}
    for filename in os.listdir(folder_path):
        if filename.lower().endswith('.ldr'):
            file_path = os.path.join(folder_path, filename)
            with open(file_path, 'r') as f:
                freq_index[filename] = count_part_frequencies(f.read())
    return freq_index

def compare_folders(folder1, folder2):
    """
    比较两个文件夹中的.ldr文件，找出没有匹配的文件
    
    参数:
        folder1: 第一个文件夹路径
        folder2: 第二个文件夹路径
    """
    # 为两个文件夹建立频率索引
    freq_index1 = build_frequency_index(folder1)
    freq_index2 = build_frequency_index(folder2)
    
    # 转换第二个文件夹的索引为频率字典到文件名的映射
    freq_to_files2 = defaultdict(list)
    for filename, freq in freq_index2.items():
        freq_key = frozenset(freq.items())  # 将字典转换为可哈希的frozenset
        freq_to_files2[freq_key].append(filename)
    
    # 检查folder1中的每个文件是否在folder2中有匹配
    unmatched_files = []
    for filename1, freq1 in freq_index1.items():
        freq_key = frozenset(freq1.items())
        if freq_key not in freq_to_files2:
            unmatched_files.append(filename1)
    
    # 输出结果
    if unmatched_files:
        print("以下文件在目标文件夹中没有找到匹配项:")
        for filename in unmatched_files:
            print(f" - {filename}")
    else:
        print("所有文件都在目标文件夹中找到了匹配项")

def compare_two_ldr_files(file1, file2):
    """
    详细比较两个.ldr文件的零件使用差异
    
    参数:
        file1: 第一个.ldr文件路径
        file2: 第二个.ldr文件路径
    
    返回:
        dict: 差异报告字典
    """
    with open(file1, 'r') as f1, open(file2, 'r') as f2:
        freq1 = count_part_frequencies(f1.read())
        freq2 = count_part_frequencies(f2.read())
    
    # 获取所有零件类别的并集
    all_parts = set(freq1.keys()).union(set(freq2.keys()))
    
    differences = {
        'only_in_file1': {},
        'only_in_file2': {},
        'count_differences': {}
    }
    
    for part in sorted(all_parts):
        count1 = freq1.get(part, 0)
        count2 = freq2.get(part, 0)
        
        if count1 == 0 and count2 > 0:
            differences['only_in_file2'][part] = count2
        elif count1 > 0 and count2 == 0:
            differences['only_in_file1'][part] = count1
        elif count1 != count2:
            differences['count_differences'][part] = (count1, count2)
    
    return differences

def print_differences(differences, file1_name, file2_name):
    """
    打印两个文件的比较结果
    
    参数:
        differences: compare_two_ldr_files()的返回结果
        file1_name: 第一个文件名（用于显示）
        file2_name: 第二个文件名（用于显示）
    """
    print(f"\n详细比较结果 ({file1_name} vs {file2_name}):")
    
    if differences['only_in_file1']:
        print("\n只在第一个文件中出现的零件:")
        for part, count in differences['only_in_file1'].items():
            print(f" - {part}: {count}次")
    
    if differences['only_in_file2']:
        print("\n只在第二个文件中出现的零件:")
        for part, count in differences['only_in_file2'].items():
            print(f" - {part}: {count}次")
    
    if differences['count_differences']:
        print("\n出现次数不同的零件:")
        for part, (count1, count2) in differences['count_differences'].items():
            print(f" - {part}: {file1_name}={count1}次, {file2_name}={count2}次")
    
    if not any(differences.values()):
        print("两个文件使用的零件完全相同")

# 使用示例
folder1 = '/public/home/wangshuo/gap/assembly/cubedit/outputs/sample/'
folder2 = '/public/home/wangshuo/gap/assembly/data/car_1k/subset_self/ldr_l30_rotrans_expand_wom'

# 比较两个文件夹
#compare_folders(folder1, folder2)

# 比较两个具体文件
file1 = '/public/home/wangshuo/gap/assembly/cubedit/outputs/sample/test_0_drp_101_r512_uncond.ldr'
file2 = '/public/home/wangshuo/gap/assembly/data/car_1k/subset_self/ldr_l30_rotrans_expand_wom/modified_car_121_rot.ldr'
diff_result = compare_two_ldr_files(file1, file2)
print_differences(diff_result, os.path.basename(file1), os.path.basename(file2))