import glob

import gradio as gr
import os
import zipfile
import tempfile
import time
from utils.Train_resnet import load_param
from utils.MyOnnxYolo import MyOnnxYolo
from utils.MyModel import MyModel
from utils.preview_img import preview_img_dir
from utils.preprocess_data import preprocess_data
from Config import Config

# 用于存储已创建的目录名称
config = Config()
data_dir = config.data_dir
model_dir = config.model_dir

os.makedirs(data_dir, exist_ok=True)
data_list = os.listdir(data_dir)
model_id_list = sorted(os.listdir(model_dir))

global_yolo_model = None
global_cls_model = None


def refresh_list():
    global data_list, model_id_list
    data_list = os.listdir(data_dir)
    model_id_list = sorted(os.listdir(model_dir))

    data_dropdown = gr.Dropdown(label="选择数据集", choices=data_list,
                                interactive=True)
    model_dropdown = gr.Dropdown(label="模型ID", choices=model_id_list)
    return data_dropdown, data_dropdown, data_dropdown, model_dropdown, model_dropdown


def process_zip(name, zip_file, progress=gr.Progress()):
    global data_list

    if not name.strip():
        return "Error: 需要输入数据集名称.", gr.update()

    try:
        # 创建一个以名称命名的目录
        dir_path = os.path.join(data_dir, name)
        os.makedirs(dir_path, exist_ok=True)

        # 获取 ZIP 文件中的文件列表
        with zipfile.ZipFile(zip_file.name, 'r') as zip_ref:
            file_list = zip_ref.namelist()
            total_files = len(file_list)

            # 解压 ZIP 文件到该目录，同时更新进度条
            for i, file in enumerate(file_list):
                zip_ref.extract(file, dir_path)
                progress((i + 1) / total_files, f"Extracting file {i + 1} of {total_files}")

        # 添加新目录到列表中
        if name not in data_list:
            data_list.append(name)

        # 返回解压后的文件列表和成功消息
        files = os.listdir(dir_path)
        return (f"解压结束!\n\n数据集保存名称为: '{name}':\n" + "\n".join(files),
                gr.update(choices=data_list, value=name))

    except zipfile.BadZipFile:
        return "Error: The uploaded file is not a valid ZIP file.", gr.update()
    except PermissionError:
        return "Error: Permission denied. Unable to create directory or extract files.", gr.update()
    except Exception as e:
        return f"Error: An unexpected error occurred: {str(e)}", gr.update()


def validate_name(name):
    if name.strip():
        return gr.update(visible=False), gr.update(interactive=True)
    else:
        return gr.update(visible=True, value="输入数据集名称"), gr.update(interactive=False)


# def update_epoch_display(epoch):
#     return f"Current epoch: {epoch}"

def start_training(epoch, data_dir_name, model_dir_name, freeze_slider, learn_rate, momentum, decay):
    global global_yolo_model, global_cls_model
    # 释放内存
    global_yolo_model = None
    global_cls_model = None

    print(epoch, data_dir_name, model_dir_name, freeze_slider, learn_rate, momentum, decay)

    train_data_path = os.path.join(data_dir, data_dir_name)

    if model_dir_name is not None:
        model_dir_path = os.path.join(model_dir, model_dir_name)
        model_path = glob.glob(os.path.join(model_dir_path, "*.pt"))[0]
    else:
        model_path = None

    load_param(epoch=epoch, data_dir=train_data_path, model_path=model_path,
               freeze=freeze_slider, learn_rate=learn_rate, momentum=momentum, decay=decay)
    # time.sleep(epoch * 0.2)  # 模拟短暂的训练过程
    return "训练结束", gr.update()


def predict_img(predict_data_dir_name, predict_model_dir_name, img):
    global global_yolo_model, global_cls_model
    print("predict_img: ", data_dir_name, model_dir_name)
    if predict_data_dir_name is None or predict_model_dir_name is None:
        return "2个参数为必选项"

    cls_list = sorted(os.listdir(os.path.join(data_dir, predict_data_dir_name, 'train')))
    print(cls_list)

    model_dir_path = os.path.join(model_dir, predict_model_dir_name)
    model_path = glob.glob(os.path.join(model_dir_path, "*.pt"))[0]

    if global_yolo_model is None:
        global_yolo_model = MyOnnxYolo(config.yolo_model_path)
    if global_cls_model is None:
        global_cls_model = MyModel(model_path)

    global_yolo_model.set_result(img)
    card_img = global_yolo_model.get_max_img(cls_id=0)
    cls_id = global_cls_model.run(card_img)

    return cls_list[cls_id], gr.update()


# 创建 Gradio 界面
with gr.Blocks() as iface:
    gr.Markdown("# 分类训练")
    with gr.Row():
        refresh_button = gr.Button("刷新数据列表")

    with gr.Tabs():
        with gr.TabItem("上传ZIP数据"):
            gr.Markdown(
                '''
                输入数数据名称, 并上传zip数据, 点击解压zip <br>
                如果是原始数据, 请将目录结构准备为: <br>
                ```python
                ---数据集名称:
                   --train:
                       -分类1:{图片1,图片2, ...},
                       -分类2:{图片1,图片2, ...},
                        ......
                ```
                之后进行数据处理后训练
                '''
            )

            with gr.Row():
                name_input = gr.Textbox(label="输入数据集名称", placeholder="Enter a name for the directory")
                file_input = gr.File(label="解压ZIP数据")

            error_output = gr.Markdown(visible=False)
            submit_btn = gr.Button("解压 ZIP", variant='primary')

            result_output = gr.Textbox(label="结果")

        with gr.TabItem("预览, 处理数据"):
            gr.Markdown(
                "预览部分训练数据, 如果数据未处理, 那么进行处理, ")
            with gr.Row():
                with gr.Column():
                    preview_data_dir_name = gr.Dropdown(label="选择数据集", choices=data_list,
                                                        interactive=True)
                    preview_button = gr.Button("预览部分图片", variant='primary')
                preview_gallery = gr.Gallery(label="部分训练集图片")

            with gr.Row():
                preprocess_button = gr.Button("处理数据集", variant='primary')
            with gr.Row():
                preprocess_output = gr.Textbox(label="处理结果")

        with gr.TabItem("训练模型"):
            gr.Markdown("设置参数训练模型, 注意模型ID不选的话则重新训练")

            with gr.Row():
                data_dir_name = gr.Dropdown(label="训练的数据集", choices=data_list,
                                            interactive=True)
                epoch_slider = gr.Slider(minimum=5, maximum=50, value=10, step=1, label="轮次")
                # epoch_display = gr.Markdown("Current epoch: 10")

            with gr.Row():
                model_dir_name = gr.Dropdown(label="模型ID", choices=model_id_list)
                freeze_slider = gr.Slider(minimum=0, maximum=7, value=7, step=1, label="冻结参数层")

            with gr.Row():
                learn_rate = gr.Number(label="学习率", value=0.01)
                momentum = gr.Number(label="动量", value=0.9)
                decay = gr.Number(label="衰减率", value=0.7)

            # epoch_slider.change(update_epoch_display, inputs=[epoch_slider], outputs=[epoch_display])
            train_button = gr.Button("开始训练", variant='primary')
            training_result = gr.Textbox(label="训练结果")

        with gr.TabItem("预测单张图片"):
            data_list = os.listdir(data_dir)
            model_id_list = sorted(os.listdir(model_dir))

            gr.Markdown("输入一张图片返回预测结果")
            with gr.Row():
                img = gr.Image(label="上传图片")

            with gr.Row():
                predict_data_dir_name = gr.Dropdown(label="训练的数据集", choices=data_list,
                                                    interactive=True)
                predict_model_dir_name = gr.Dropdown(label="模型ID", choices=model_id_list)

            predict_button = gr.Button("预测图片", variant='primary')
            predict_result = gr.Textbox(label="预测结果")

    refresh_button.click(refresh_list,
                         outputs=[preview_data_dir_name, data_dir_name, predict_data_dir_name,
                                  model_dir_name, predict_model_dir_name])

    name_input.change(validate_name, inputs=[name_input], outputs=[error_output, submit_btn])
    submit_btn.click(process_zip, inputs=[name_input, file_input], outputs=[result_output, data_dir_name])
    preview_button.click(preview_img_dir, inputs=preview_data_dir_name, outputs=preview_gallery)
    preprocess_button.click(preprocess_data, inputs=preview_data_dir_name, outputs=preprocess_output)

    train_button.click(start_training,
                       inputs=[epoch_slider, data_dir_name,
                               model_dir_name, freeze_slider, learn_rate, momentum, decay],
                       outputs=[training_result])
    predict_button.click(predict_img,
                         inputs=[predict_data_dir_name, predict_model_dir_name, img],
                         outputs=[predict_result])

# 启动界面
iface.launch(server_name="0.0.0.0")