WQ_GUI/src/gui/panels/step4_sampling_panel.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Step4 面板 - 采样点布设
"""

import os
import sys
from pathlib import Path

# 路径归一化 helper（与 pipeline.get_step_output_dir 互为表里）
_HERE = os.path.dirname(os.path.abspath(__file__))
if _HERE not in sys.path:
    sys.path.insert(0, _HERE)
from _step_path_resolver import resolve_subdir

from PyQt5.QtCore import QTimer
from PyQt5.QtWidgets import (
    QWidget, QVBoxLayout, QGroupBox, QFormLayout,
    QPushButton, QCheckBox, QSpinBox, QMessageBox,
)

from src.gui.components.custom_widgets import FileSelectWidget
from src.gui.dialogs import SamplingViewerDialog
from src.gui.styles import ModernStylesheet


class Step4SamplingPanel(QWidget):
    """步骤4：采样点布设"""
    def __init__(self, parent=None):
        super().__init__(parent)
        self.init_ui()

    def init_ui(self):
        layout = QVBoxLayout()

        # 去耀斑影像文件（用于独立运行）
        self.deglint_img_file = FileSelectWidget(
            "去耀斑影像:",
            "Image Files (*.bsq *.dat *.tif);;All Files (*.*)"
        )
        layout.addWidget(self.deglint_img_file)

        # 水域掩膜文件（可选，用于独立运行）
        self.water_mask_file = FileSelectWidget(
            "水域掩膜:",
            "Mask Files (*.dat *.tif);;All Files (*.*)"
        )
        self.water_mask_file.label.setText("水域掩膜:")
        layout.addWidget(self.water_mask_file)

        # 参数设置
        params_group = QGroupBox("采样参数")
        params_layout = QFormLayout()

        self.interval = QSpinBox()
        self.interval.setRange(10, 500)
        self.interval.setValue(50)
        params_layout.addRow("采样点间隔(像素):", self.interval)

        self.sample_radius = QSpinBox()
        self.sample_radius.setRange(1, 50)
        self.sample_radius.setValue(5)
        params_layout.addRow("采样半径(像素):", self.sample_radius)

        self.chunk_size = QSpinBox()
        self.chunk_size.setRange(100, 10000)
        self.chunk_size.setValue(1000)
        params_layout.addRow("处理块大小:", self.chunk_size)

        self.use_adaptive_sampling = QCheckBox("启用自适应采样")
        self.use_adaptive_sampling.setChecked(True)
        params_layout.addRow("采样模式:", self.use_adaptive_sampling)

        params_group.setLayout(params_layout)
        layout.addWidget(params_group)

        # 输出文件路径
        self.output_file = FileSelectWidget(
            "输出采样点:",
            "CSV Files (*.csv);;All Files (*.*)"
        )
        self.output_file.line_edit.setPlaceholderText("sampling_spectra.csv")
        layout.addWidget(self.output_file)

        # 启用步骤
        self.enable_checkbox = QCheckBox("启用此步骤")
        self.enable_checkbox.setChecked(True)
        layout.addWidget(self.enable_checkbox)

        # 独立运行按钮
        self.run_btn = QPushButton("独立运行此步骤")
        self.run_btn.setStyleSheet(ModernStylesheet.get_button_stylesheet('success'))
        self.run_btn.clicked.connect(self._on_run_single_clicked)
        layout.addWidget(self.run_btn)

        # 交互式预览按钮
        self.preview_btn = QPushButton("📊 交互式预览采样点与光谱")
        self.preview_btn.setEnabled(False)
        self.preview_btn.clicked.connect(self._open_sampling_viewer)
        layout.addWidget(self.preview_btn)

        layout.addStretch()
        self.setLayout(layout)

        # 添加心跳定时器，每2秒自动检查一次输出文件状态，刷新预览按钮
        self._status_timer = QTimer(self)
        self._status_timer.timeout.connect(self._check_csv_exists)
        self._status_timer.start(2000)

        # 监听输出路径变化，实时更新预览按钮状态
        self.output_file.line_edit.textChanged.connect(self._on_output_changed)

    def get_config(self):
        """获取配置"""
        config = {
            'interval': self.interval.value(),
            'sample_radius': self.sample_radius.value(),
            'chunk_size': self.chunk_size.value(),
            'use_adaptive_sampling': self.use_adaptive_sampling.isChecked(),
        }
        deglint_img_path = self.deglint_img_file.get_path()
        if deglint_img_path:
            config['deglint_img_path'] = deglint_img_path
        water_mask_path = self.water_mask_file.get_path()
        if water_mask_path:
            config['water_mask_path'] = water_mask_path
        return config

    def set_config(self, config):
        """设置配置"""
        if 'interval' in config:
            self.interval.setValue(config['interval'])
        if 'sample_radius' in config:
            self.sample_radius.setValue(config['sample_radius'])
        if 'chunk_size' in config:
            self.chunk_size.setValue(config['chunk_size'])
        if 'use_adaptive_sampling' in config:
            self.use_adaptive_sampling.setChecked(config['use_adaptive_sampling'])
        if 'deglint_img_path' in config:
            self.deglint_img_file.set_path(config['deglint_img_path'])
        if 'water_mask_path' in config:
            self.water_mask_file.set_path(config['water_mask_path'])
        if 'glint_mask_path' in config:
            self.glint_mask_file.set_path(config['glint_mask_path'])

    def update_from_config(self, work_dir=None, pipeline=None):
        """从全局配置自动填充去耀斑影像和掩膜路径

        Args:
            work_dir: 工作目录路径
            pipeline: Pipeline 实例（用于从 step_outputs 获取绝对路径）
        """
        if work_dir:
            self.work_dir = work_dir
        elif hasattr(self, 'work_dir') and self.work_dir:
            pass
        else:
            self.work_dir = None

        main_window = self.window()

        # 1. 填充去耀斑影像路径（优先从 pipeline.step_outputs 获取绝对路径）
        deglint_path = None
        if pipeline and hasattr(pipeline, 'step_outputs'):
            step3_outputs = getattr(pipeline, 'step_outputs', {}).get('step3', {})
            deglint_path = (
                step3_outputs.get('deglint_image')
                or step3_outputs.get('output_path')
                or step3_outputs.get('output_file')
                or step3_outputs.get('deglint_img_path')
            )
        # 回退：从 step3 面板 widget 直接读取（可能是相对路径）
        if not deglint_path and hasattr(main_window, 'step3_panel'):
            deglint_path = main_window.step3_panel.output_file.get_path()

        if deglint_path:
            # 若为相对路径，使用 work_dir 合成为绝对路径
            if not os.path.isabs(deglint_path):
                deglint_path = os.path.join(self.work_dir or '', deglint_path).replace('\\', '/')
            self.deglint_img_file.set_path(deglint_path)

        # 2. 填充水域掩膜路径（优先级：pipeline.step_outputs > step1_panel > 1_water_mask > input-test）
        water_mask_path = None
        if pipeline and hasattr(pipeline, 'step_outputs'):
            step1_outputs = getattr(pipeline, 'step_outputs', {}).get('step1', {})
            water_mask_path = (
                step1_outputs.get('water_mask')
                or step1_outputs.get('output_path')
                or step1_outputs.get('output_file')
            )
        # 回退：从 step1 面板 widget 直接读取
        if not water_mask_path and hasattr(main_window, 'step1_panel'):
            water_mask_path = main_window.step1_panel.output_file.get_path()
        # 备选：扫描 1_water_mask 目录下的 .dat 文件
        if not water_mask_path and self.work_dir:
            mask_dir = resolve_subdir(self.work_dir, 'water_mask')
            if os.path.isdir(mask_dir):
                dat_files = [f for f in os.listdir(mask_dir) if f.lower().endswith('.dat')]
                if dat_files:
                    water_mask_path = os.path.join(mask_dir, dat_files[0]).replace('\\', '/')
        # 备选：扫描 input-test 目录（优先匹配 water_mask_from_shp.dat）
        if not water_mask_path and self.work_dir:
            input_test_dir = os.path.join(self.work_dir, "input-test")
            if os.path.isdir(input_test_dir):
                dat_files = [f for f in os.listdir(input_test_dir) if f.lower().endswith('.dat')]
                # 优先匹配 water_mask_from_shp.dat
                for f in dat_files:
                    if 'water_mask_from_shp' in f.lower():
                        water_mask_path = os.path.join(input_test_dir, f).replace('\\', '/')
                        break
                # 否则取第一个 .dat 文件
                if not water_mask_path and dat_files:
                    water_mask_path = os.path.join(input_test_dir, dat_files[0]).replace('\\', '/')

        if water_mask_path:
            # 若为相对路径，使用 work_dir 合成为绝对路径
            if not os.path.isabs(water_mask_path):
                water_mask_path = os.path.join(self.work_dir or '', water_mask_path).replace('\\', '/')
            self.water_mask_file.set_path(water_mask_path)

        # 3. 自动填充输出路径（绝对路径）
        if self.work_dir:
            output_path = resolve_subdir(self.work_dir, 'sampling_csv_path')
            os.makedirs(os.path.dirname(output_path), exist_ok=True)
            self.output_file.set_path(output_path.replace('\\', '/'))

        # 4. 同步更新预览按钮状态（路径可能已自动填充）
        self._check_csv_exists()

    def _on_run_single_clicked(self):
        """通过 EventBus 发布单步执行请求（解耦面板与 PipelineExecutor）。"""
        from src.gui.core.event_bus import global_event_bus

        deglint_img_path = self.deglint_img_file.get_path()
        if not deglint_img_path:
            QMessageBox.warning(self, "输入错误", "请选择去耀斑影像文件！")
            return

        config = {'step4_sampling': self.get_config()}
        global_event_bus.publish('RequestRunSingleStep', {
            'step_name': 'step4_sampling',
            'config': config,
        })

    def run_step(self):
        """独立运行步骤4（旧版 parent 链上溯方式，保留兼容）。"""
        deglint_img_path = self.deglint_img_file.get_path()
        if not deglint_img_path:
            QMessageBox.warning(self, "输入错误", "请选择去耀斑影像文件！")
            return

        main_window = self.window()
        if hasattr(main_window, 'run_single_step'):
            config = {'step4_sampling': self.get_config()}
            main_window.run_single_step('step4_sampling', config)

    def _check_csv_exists(self):
        """检查 output csv 是否存在，驱动预览按钮启停"""
        csv_path = self.output_file.get_path()
        enabled = bool(csv_path and os.path.isabs(csv_path) and os.path.exists(csv_path))
        self.preview_btn.setEnabled(enabled)
        return enabled

    def _on_output_changed(self, _text=None):
        """输出路径输入框内容变化时调用（_text 为 line_edit.textChanged 信号参数）"""
        self._check_csv_exists()

    def _open_sampling_viewer(self):
        """打开交互式采样点查看器弹窗"""
        csv_path = self.output_file.get_path()
        if not csv_path or not os.path.exists(csv_path):
            QMessageBox.warning(
                self, "文件不存在",
                f"采样点 CSV 文件不存在：{csv_path}\n请先运行步骤4生成数据。"
            )
            return
        dialog = SamplingViewerDialog(csv_path, self)
        dialog.exec_()
        # 弹窗关闭后再次检查状态（可能文件被覆盖等）
        self._check_csv_exists()