import time
import gradio as gr
from huggingface_hub import snapshot_download
import os
import zipfile
from PIL import Image, UnidentifiedImageError
from transformers import AutoProcessor, CLIPModel
from vector_db.vector_db_client import VectorDB
from tcvectordb.model.document import Document
import uuid
import traceback
import numpy as np 
# 生成随机的 UUID
LOCAL_MODEL_PATH = "download_model.local_model_path"
MODEL_NAME = "download_model.model_name"
LOCAL_GRAPH_PATH="graph_upload.local_graph_path"
os.environ["HF_ENDPOINT"] = "https://hf-mirror.com"
init_css="""
            <style>
                .equal-height-row {
                    display: flex;
                }
                .equal-height-column {
                    flex: 1;
                    display: flex;
                    flex-direction: column;
                }
                .equal-height-column > * {
                    flex: 1;
                }
            </style>
            """
class Initial_and_Upload:

    def __init__(self, config,vdb: VectorDB):
        self.vdb = vdb
        self.model_name = config.get(MODEL_NAME)
        self.local_model_path = config.get(LOCAL_MODEL_PATH)
        self.local_graph_path=config.get(LOCAL_GRAPH_PATH)
        self.model_cache_directory = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), self.local_model_path, self.model_name)
        self.graph_cache_directory = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), self.local_graph_path)

    def initial_model(self):
        model = CLIPModel.from_pretrained(self.model_cache_directory)
        processor = AutoProcessor.from_pretrained(self.model_cache_directory)
        return model,processor
    
    def _download_model(self, model_name, progress=gr.Progress()):
        """
        下载指定的Hugging Face模型并保存在指定位置。

        参数:
        model_name (str): 模型在Hugging Face上的名字。
        save_directory (str): 模型文件保存的位置。
        """
 

        os.environ['TRANSFORMERS_CACHE'] = self.model_cache_directory
        
        # 创建保存目录（如果不存在）
        if not os.path.exists(self.model_cache_directory):
            os.makedirs(self.model_cache_directory)
        text = f"[正在尝试下载] 模型 {model_name}，因为涉及到模型相关的多个文件下载，进度仅在后台显示。\n"
        progress(0.5, desc=text)
        try:
            # 下载模型
            snapshot_download(
                repo_id=model_name,
                local_dir=self.model_cache_directory,
                local_dir_use_symlinks=False,
            )
            
            progress(1, f"模型 {model_name} 已下载并保存在 {self.model_cache_directory}")
            text += f"模型 {model_name} 已下载并保存在 {self.model_cache_directory}"
            
            time.sleep(0.3)
            return text
        except Exception as e:
            text += f"[下载失败] 失败原因：{e}"
            return text

    def _process_image(self, image_path,emb_model,processor):
        """
        处理单个图片文件，将其转换为向量。

        参数:
        image_path (str): 图片文件的路径。

        返回:
        torch.Tensor: 图片的向量表示。
        """
        
        image = Image.open(image_path)
        # image.verify()  # 验证图片是否有效
        inputs = processor(images=image, return_tensors="pt")
        image_features = emb_model.get_image_features(**inputs)
        return image_features

    def _handle_upload(self, file, progress=gr.Progress()):
        """
        处理上传的文件，识别是图片还是ZIP压缩包，并将图片转换为向量。

        参数:
        file (file): 上传的文件。

        返回:
        str: 文件类型和处理结果。
        """
        output_text = ""
        image_vectors = []
        if not os.path.exists(self.model_cache_directory):
            output_text += f"缓存目录 {self.model_cache_directory} 不存在，无法初始化模型。"
        else:
            model, processor = self.initial_model()
            collection = self.vdb.get_collection()
            
            if zipfile.is_zipfile(file.name):
                with zipfile.ZipFile(file.name, 'r') as zip_ref:
                    zip_ref.extractall(self.local_graph_path)
                    image_files = [file_name for file_name in zip_ref.namelist() if file_name.lower().endswith(('.png', '.jpg', '.jpeg', '.bmp', '.gif')) and not file_name.startswith('__MACOSX') and not file_name.startswith('._')]
                    
                    total_files = len(image_files)
                    for i, file_name in enumerate(image_files):
                        image_path = os.path.join(self.local_graph_path, file_name)
                        try:
                            image_vector = self._process_image(image_path, model, processor).squeeze().tolist()  # 转换为一维列表
                            random_uuid = str(uuid.uuid4())  # 转换为字符串
                            collection.upsert(documents=[Document(id=random_uuid, vector=image_vector, local_graph_path=image_path)], build_index=True)
                            output_text += f"处理图片: {file_name}\n"
                        except UnidentifiedImageError:
                            output_text += f"无法识别图片文件: {file_name}\n"
                        
                        # 更新进度
                        progress((i + 1) / total_files)
                    
                output_text += "上传的是ZIP压缩包，已解压缩并处理所有图片。"
            else:
                try:
                    # 保存单张图片到指定文件夹
                    image_path = os.path.join(self.graph_cache_directory, os.path.basename(file.name))
                    with open(file.name, "rb") as f_src:
                        with open(image_path, "wb") as f_dst:
                            f_dst.write(f_src.read())
                    
                    image_vector = self._process_image(image_path, model, processor).squeeze().tolist()  # 转换为一维列表
                    random_uuid = str(uuid.uuid4())  # 转换为字符串
                    collection.upsert(documents=[Document(id=random_uuid, vector=image_vector, local_graph_path=image_path)], build_index=True)
                    output_text += "上传的是图片文件，并已处理。\n"
                    
                    # 更新进度
                    progress(1.0)
                except (IOError, SyntaxError) as e:
                    output_text += f"无法识别文件类型：{e}\n"

        # 返回处理结果和图片向量
        return output_text, image_vectors
    def _initialize_vector_db(self, progress=gr.Progress()):
        """
        初始化向量数据库。

        返回:
        str: 初始化结果。
        """
        output_text = f"[正在尝试连接] VectorDB {self.vdb.address}\n"
        progress(0, desc=output_text)
        try:
            client = self.vdb.create_client()
            client.list_databases()
            progress(0.05, f"[连接成功] VectorDB {self.vdb.address}\n")
            output_text += f"[连接成功] VectorDB {self.vdb.address}\n"
            client.close()

            progress(0.1, f"[正在初始化] ai database '{self.vdb.db_name}'\n")
            output_text += f"[正在初始化] ai database '{self.vdb.db_name}'\n"
            self.vdb.init_database()
            progress(0.3, f"[初始化完成] ai database '{self.vdb.db_name}'\n")
            output_text += f"[初始化完成] ai database '{self.vdb.db_name}'\n"

            progress(0.5, f"[正在初始化] ai collection '{self.vdb.ai_graph_emb_collection}'\n")
            output_text += f"[正在初始化] ai collection '{self.vdb.ai_graph_emb_collection}'\n"
            self.vdb.init_graph_collection()
            progress(0.9, f"[初始化完成] ai collection '{self.vdb.ai_graph_emb_collection}'\n")
            output_text += f"[初始化完成] ai collection '{self.vdb.ai_graph_emb_collection}'\n"

            progress(1, f"您可以去图片上传栏目上传图片或ZIP压缩包，然后进一步进行[图片搜索]")
            output_text += f"您可以去图片上传栏目上传图片或ZIP压缩包，然后进一步进行[图片搜索]"

            time.sleep(0.3)
        except Exception as e:
            output_text += f"[数据库访问失败] 失败原因：{e}"
            error_trace = traceback.format_exc()
            print(error_trace)
        return output_text

    def get_init_panel(self):
        with gr.Blocks() as demo:
            gr.HTML(init_css)
            with gr.Row():
                
                with gr.Column():
                    model_name_input = gr.Textbox(lines=1, label="模型名称", placeholder="请输入Hugging Face模型名称...", value=self.model_name)
                    output = gr.Textbox(lines=10, label="下载进度", placeholder="下载进度将在这里显示...")
                    init_button = gr.Button("开始下载模型")

                    init_button.click(
                        fn=self._download_model,
                        inputs=[model_name_input],
                        outputs=output
                    )
                with gr.Column():
                    db_init_output = gr.Textbox(lines=14.5, label="数据库初始化结果", placeholder="数据库初始化结果将在这里显示...")
                    db_init_button = gr.Button("初始化向量数据库")

                    db_init_button.click(
                        fn=self._initialize_vector_db,
                        inputs=[],
                        outputs=db_init_output
                    )
            with gr.Row():
                    upload_file = gr.File(label="上传图片或ZIP压缩包")
            with gr.Row():
                    upload_output = gr.Textbox(lines=10, label="上传结果", placeholder="上传结果将在这里显示...")
            with gr.Row():
                    upload_button = gr.Button("上传文件")

                    upload_button.click(
                        fn=self._handle_upload,
                        inputs=[upload_file],
                        outputs=[upload_output, gr.State()]
                    )

        return demo