from gps_extractor import GPSExtractor
from gps_filter import GPSFilter
from grid_divider import GridDivider
from logger import setup_logger
import os
import pandas as pd
import shutil
import matplotlib.pyplot as plt
from typing import List, Dict, Optional
from dataclasses import dataclass
from tqdm import tqdm


@dataclass
class PreprocessConfig:
    """预处理配置类"""
    image_dir: str
    output_dir: str
    filter_grid_size: float = 0.001
    filter_dense_distance_threshold: float = 10
    filter_distance_threshold: float = 0.001
    filter_min_neighbors: int = 6
    grid_overlap: float = 0.05
    enable_filter: bool = True
    enable_grid_division: bool = True
    enable_visualization: bool = True


class ImagePreprocessor:
    def __init__(self, config: PreprocessConfig):
        self.config = config
        self.logger = setup_logger(config.output_dir)
        self.gps_points = []

    def extract_gps(self) -> List[Dict]:
        """提取GPS数据"""
        self.logger.info("开始提取GPS数据")
        extractor = GPSExtractor(self.config.image_dir)
        self.gps_points = extractor.extract_all_gps()
        self.logger.info(f"成功提取 {len(self.gps_points)} 个GPS点")
        return self.gps_points

    def filter_points(self) -> List[Dict]:
        """过滤GPS点"""
        if not self.config.enable_filter:
            return self.gps_points

        self.logger.info("开始过滤GPS点")
        filter = GPSFilter(self.config.output_dir)

        self.logger.info(f"开始过滤孤立点 (距离阈值: {self.config.filter_distance_threshold}, 最小邻居数: {
                         self.config.filter_min_neighbors})")
        self.gps_points = filter.filter_isolated_points(
            self.gps_points,
            self.config.filter_distance_threshold,
            self.config.filter_min_neighbors
        )
        self.logger.info(f"孤立点过滤后剩余 {len(self.gps_points)} 个GPS点")

        self.logger.info(f"开始过滤密集点 (网格大小: {self.config.filter_grid_size}, 距离阈值: {
                         self.config.filter_dense_distance_threshold})")
        self.gps_points = filter.filter_dense_points(
            self.gps_points,
            grid_size=self.config.filter_grid_size,
            distance_threshold=self.config.filter_dense_distance_threshold
        )
        self.logger.info(f"密集点过滤后剩余 {len(self.gps_points)} 个GPS点")
        return self.gps_points

    def divide_grids(self) -> Dict[int, List[Dict]]:
        """划分网格"""
        if not self.config.enable_grid_division:
            return {0: self.gps_points}  # 不划分网格时，所有点放在一个网格中

        self.logger.info(f"开始划分网格 (重叠率: {self.config.grid_overlap})")
        grid_divider = GridDivider(overlap=self.config.grid_overlap)
        grids = grid_divider.divide_grids(self.gps_points)
        grid_points = grid_divider.assign_to_grids(self.gps_points, grids)
        self.logger.info(f"成功划分为 {len(grid_points)} 个网格")
        return grid_points

    def copy_images(self, grid_points: Dict[int, List[Dict]]):
        """复制图像到目标文件夹"""
        self.logger.info("开始复制图像文件")
        os.makedirs(self.config.output_dir, exist_ok=True)

        for grid_idx, points in grid_points.items():
            if self.config.enable_grid_division:
                output_dir = os.path.join(self.config.output_dir, f'grid_{
                                          grid_idx + 1}', 'images')
            else:
                output_dir = os.path.join(self.config.output_dir, 'images')

            os.makedirs(output_dir, exist_ok=True)

            for point in tqdm(points, desc=f"复制网格 {grid_idx + 1} 的图像"):
                src = os.path.join(self.config.image_dir, point['file'])
                dst = os.path.join(output_dir, point['file'])
                shutil.copy(src, dst)
            self.logger.info(f"网格 {grid_idx + 1} 包含 {len(points)} 张图像")

    def visualize_results(self):
        """可视化处理结果"""
        if not self.config.enable_visualization:
            return

        self.logger.info("开始生成可视化结果")
        extractor = GPSExtractor(self.config.image_dir)
        original_points = extractor.extract_all_gps()

        with open(os.path.join(self.config.output_dir, 'del_imgs.txt'), "r", encoding="utf-8") as file:
            filtered_file = [line.strip() for line in file]

        # 绘制散点图
        plt.figure(figsize=(10, 8))
        plt.scatter([p['lon'] for p in original_points],
                    [p['lat'] for p in original_points],
                    color='blue', label="Original Points", alpha=0.6)
        plt.scatter([p['lon'] for p in original_points if p['file'] in filtered_file],
                    [p['lat']
                        for p in original_points if p['file'] in filtered_file],
                    color="red", label="Filtered Points", alpha=0.6)
        plt.title("GPS Coordinates of Images", fontsize=14)
        plt.xlabel("Longitude", fontsize=12)
        plt.ylabel("Latitude", fontsize=12)
        plt.grid(True)
        plt.legend()
        plt.savefig(os.path.join(self.config.output_dir, 'filter_GPS.png'))
        plt.close()
        self.logger.info("预处理结果图已保存")

    def process(self):
        """执行完整的预处理流程"""
        try:
            self.extract_gps()
            self.filter_points()
            grid_points = self.divide_grids()
            self.copy_images(grid_points)
            self.visualize_results()
            self.logger.info("预处理任务完成")
        except Exception as e:
            self.logger.error(f"处理过程中发生错误: {str(e)}", exc_info=True)
            raise


if __name__ == '__main__':
    # 创建配置
    config = PreprocessConfig(
        image_dir=r'C:\datasets\1815\output\grid_5\images',
        output_dir=r'C:\datasets\1815\output\grid_5',
        filter_grid_size=0.001,
        filter_dense_distance_threshold=10,
        filter_distance_threshold=0.001,
        filter_min_neighbors=6,
        grid_overlap=0.05,
        enable_filter=False,
        enable_grid_division=True,
        enable_visualization=False
    )

    # 创建处理器并执行
    processor = ImagePreprocessor(config)
    processor.process()