import os
import subprocess

def main():
    base_dir = r"D:\Users\roy\CV_final_project\champ-master"
    driving_videos_dir = os.path.join(base_dir, "driving_videos")
    blender_exe = r"D:\Program Files (x86)\blender-3.6.0-windows-x64\blender.exe"
    script_path = os.path.join("scripts", "data_processors", "smpl", "smooth_smpls.py")
    
    if not os.path.exists(driving_videos_dir):
        print(f"錯誤：找不到資料夾 {driving_videos_dir}")
        return

    # 取得所有的影片資料夾名稱
    video_names = [d for d in os.listdir(driving_videos_dir) if os.path.isdir(os.path.join(driving_videos_dir, d))]
    video_names.sort()
    
    print(f"總共找到 {len(video_names)} 支影片需要進行 3D 骨架平滑處理...")

    for video_name in video_names:
        # 使用相對路徑，因為 cwd 設定為 base_dir
        smpls_npz_path = os.path.join("driving_videos", video_name, "smpl_results", "smpls_group.npz")
        
        # 檢查該影片的動作捕捉檔 (npz) 是否存在
        full_npz_path = os.path.join(base_dir, smpls_npz_path)
        if not os.path.exists(full_npz_path):
            print(f"[{video_name}] 找不到動作捕捉檔案 (跳過): {smpls_npz_path}")
            continue
            
        print(f"\n========================================")
        print(f"正在平滑化影片骨架: {video_name}")
        print(f"========================================")
        
        # 構建 Blender 執行指令
        cmd = [
            blender_exe, 
            "--background", 
            "--python", script_path, 
            "--", # 分隔符，告知 Blender 後面是給 python 腳本的參數
            "--smpls_group_path", smpls_npz_path,
            "--smoothed_result_path", smpls_npz_path # 直接覆蓋原始檔案
        ]
        
        result = subprocess.run(cmd, cwd=base_dir)
        
        if result.returncode != 0:
            print(f"[{video_name}] 執行 Blender 時發生錯誤！")
        else:
            print(f"[{video_name}] 平滑化完成！\n")

if __name__ == "__main__":
    main()