# oss_utils.py
# OSS相关工具函数
import os
import oss2
from typing import List
import shutil

# OSS配置
OSS_CONFIG = {
    "access_key_id": os.getenv("OSS_ACCESS_KEY_ID"),
    "access_key_secret": os.getenv("OSS_ACCESS_KEY_SECRET"),
    "endpoint": os.getenv("OSS_ENDPOINT"),
    "bucket_name": os.getenv("OSS_BUCKET_NAME")
}

# 调试OSS配置信息
print(f"🔍 OSS CONFIG DEBUG:")
print(f"  - access_key_id: {'✅' if OSS_CONFIG['access_key_id'] else '❌'} ({'***' + OSS_CONFIG['access_key_id'][-4:] if OSS_CONFIG['access_key_id'] else 'None'})")
print(f"  - access_key_secret: {'✅' if OSS_CONFIG['access_key_secret'] else '❌'} ({'***' + OSS_CONFIG['access_key_secret'][-4:] if OSS_CONFIG['access_key_secret'] else 'None'})")
print(f"  - endpoint: {OSS_CONFIG['endpoint'] or '❌ None'}")
print(f"  - bucket_name: {OSS_CONFIG['bucket_name'] or '❌ None'}")

# 初始化OSS客户端
try:
    auth = oss2.Auth(OSS_CONFIG["access_key_id"], OSS_CONFIG["access_key_secret"])
    bucket = oss2.Bucket(auth, OSS_CONFIG["endpoint"], OSS_CONFIG["bucket_name"])
    print(f"✅ OSS client initialized successfully")
    
    # 测试OSS连接
    try:
        # 尝试列出bucket根目录的文件来测试连接
        test_files = []
        for i, obj in enumerate(oss2.ObjectIterator(bucket, max_keys=5)):
            test_files.append(obj.key)
            if i >= 4:  # 只获取前5个
                break
        print(f"✅ OSS connection test successful, found {len(test_files)} test files")
        if test_files:
            print(f"   Sample files: {test_files[:3]}")
    except Exception as test_e:
        print(f"⚠️  OSS connection test failed: {test_e}")
        
except Exception as e:
    print(f"❌ OSS client initialization failed: {e}")
    bucket = None

# 临时文件根目录
TMP_ROOT = os.path.join(os.path.dirname(os.path.abspath(__file__)), "tmp")
os.makedirs(TMP_ROOT, exist_ok=True)

def list_oss_files(folder_path: str) -> List[str]:
    """列出OSS文件夹中的所有文件"""
    if bucket is None:
        print(f"❌ OSS DEBUG: Bucket not initialized, cannot list files")
        return []
        
    files = []
    try:
        print(f"🔍 OSS DEBUG: Listing files with prefix: '{folder_path}'")
        file_count = 0
        for obj in oss2.ObjectIterator(bucket, prefix=folder_path):
            if not obj.key.endswith('/'):  # 排除目录本身
                files.append(obj.key)
                file_count += 1
                if file_count <= 5:  # 只输出前5个文件用于调试
                    print(f"🔍 OSS DEBUG: Found file: {obj.key}")
        
        print(f"🔍 OSS DEBUG: Total files found: {len(files)}")
        return sorted(files, key=lambda x: os.path.splitext(x)[0]) 
    except Exception as e:
        print(f"❌ OSS DEBUG: Error listing OSS files: {str(e)}")
        print(f"❌ OSS DEBUG: Exception type: {type(e).__name__}")
        print(f"❌ OSS DEBUG: folder_path was: '{folder_path}'")
        return []

def download_oss_file(oss_path: str, local_path: str):
    """从OSS下载文件到本地"""
    if bucket is None:
        print(f"❌ OSS DEBUG: Bucket not initialized, cannot download file")
        raise Exception("OSS bucket not initialized")
        
    try:
        # 确保本地目录存在
        os.makedirs(os.path.dirname(local_path), exist_ok=True)
        bucket.get_object_to_file(oss_path, local_path)
    except Exception as e:
        print(f"Error downloading file {oss_path}: {str(e)}")
        raise

def oss_file_exists(oss_path: str) -> bool:
    """检查OSS文件是否存在"""
    if bucket is None:
        print(f"❌ OSS DEBUG: Bucket not initialized, cannot check file existence")
        return False
        
    try:
        return bucket.object_exists(oss_path)
    except Exception as e:
        print(f"Error checking if file exists in OSS: {str(e)}")
        return False

def get_user_tmp_dir(session_hash: str) -> str:
    """获取用户临时目录"""
    user_dir = os.path.join(TMP_ROOT, str(session_hash))
    os.makedirs(user_dir, exist_ok=True)
    return user_dir

def clean_oss_result_path(result_folder: str, task_id: str) -> str:
    """统一的OSS结果路径清理函数"""
    cleaned_result_folder = result_folder.strip('/')
    if cleaned_result_folder.startswith('oss-waic/'):
        cleaned_result_folder = cleaned_result_folder[9:]  # 移除 'oss-waic/' 前缀
    elif cleaned_result_folder.startswith('/oss-waic/'):
        cleaned_result_folder = cleaned_result_folder[10:]  # 移除 '/oss-waic/' 前缀
    
    # 确保路径格式正确
    if not cleaned_result_folder.startswith('gradio_demo/'):
        cleaned_result_folder = f"gradio_demo/tasks/{task_id}"
    
    return cleaned_result_folder

def test_oss_access(task_id: str = None):
    """测试OSS访问并查找特定任务的文件"""
    if bucket is None:
        print("❌ Cannot test OSS access - bucket not initialized")
        return
    
    test_paths = [
        "gradio_demo/",
        "gradio_demo/tasks/",
    ]
    
    if task_id:
        test_paths.extend([
            f"gradio_demo/tasks/{task_id}/",
            f"gradio_demo/tasks/{task_id}/images/",
            f"gradio_demo/tasks/{task_id}/image/",
        ])
    
    for path in test_paths:
        try:
            print(f"🔍 Testing path: {path}")
            files = []
            for i, obj in enumerate(oss2.ObjectIterator(bucket, prefix=path, max_keys=10)):
                files.append(obj.key)
                if i >= 9:
                    break
            print(f"   Found {len(files)} files")
            if files:
                print(f"   Sample: {files[:3]}")
        except Exception as e:
            print(f"   ❌ Error: {e}")

def cleanup_user_tmp_dir(session_hash: str):
    """清理用户临时目录"""
    user_dir = os.path.join(TMP_ROOT, str(session_hash))
    if os.path.exists(user_dir):
        shutil.rmtree(user_dir)