import torch
import torch.nn as nn
import torch.nn.functional as F
from .unet import GinkaUNet
from .output import GinkaOutput
from .input import GinkaInput

def print_memory(tag=""):
    print(f"{tag} | 当前显存: {torch.cuda.memory_allocated() / 1024**2:.2f} MB, 最大显存: {torch.cuda.max_memory_allocated() / 1024**2:.2f} MB")

class GinkaModel(nn.Module):
    def __init__(self, base_ch=64, out_ch=32):
        """Ginka Model 模型定义部分
        """
        super().__init__()
        self.input = GinkaInput(32, 32, (13, 13), (32, 32))
        self.unet = GinkaUNet(32, base_ch, base_ch)
        self.output = GinkaOutput(base_ch, out_ch, (13, 13))
        
    def forward(self, x, stage):
        """
        Args:
            x: 参考地图的特征向量
        Returns:
            logits: 输出logits [BS, num_classes, H, W]
        """
        x = self.input(x)
        x = self.unet(x)
        x = self.output(x, stage)
        return F.softmax(x, dim=1)
    
# 检查显存占用
if __name__ == "__main__":
    input = torch.randn((1, 32, 13, 13)).cuda()
    
    # 初始化模型
    model = GinkaModel().cuda()
    
    print_memory("初始化后")
    
    # 前向传播
    output = model(input, 1)
    
    print_memory("前向传播后")
    
    print(f"输入形状: feat={input.shape}")
    print(f"输出形状: output={output.shape}")
    print(f"Input parameters: {sum(p.numel() for p in model.input.parameters())}")
    print(f"UNet parameters: {sum(p.numel() for p in model.unet.parameters())}")
    print(f"Output parameters: {sum(p.numel() for p in model.output.parameters())}")
    print(f"Total parameters: {sum(p.numel() for p in model.parameters())}")