# ui/widgets/left_panel.py
from PyQt6.QtWidgets import QWidget, QVBoxLayout, QLabel, QLineEdit, QTreeView, QComboBox
from PyQt6.QtGui import QFileSystemModel
from PyQt6.QtCore import QDir, pyqtSignal

class LeftPanel(QWidget):
    search_changed = pyqtSignal(str)
    root_folder_changed = pyqtSignal(str)  # Сигнал переключения активной корневой папки

    def __init__(self, parent=None):
        super().__init__(parent)
        self.init_ui()

    def init_ui(self):
        layout = QVBoxLayout(self)
        layout.setContentsMargins(5, 5, 5, 5)

        self.search_input = QLineEdit()
        self.search_input.setPlaceholderText("Поиск по тегам или промтам...")
        self.search_input.textChanged.connect(self.search_changed.emit)
        layout.addWidget(self.search_input)

        # Выпадающий список выбора активной корневой директории
        layout.addWidget(QLabel("Активная папка:"))
        self.folder_selector = QComboBox()
        self.folder_selector.currentTextChanged.connect(self._on_folder_changed)
        layout.addWidget(self.folder_selector)

        layout.addWidget(QLabel("Дерево подпапок:"))

        self.folder_model = QFileSystemModel()
        self.folder_model.setFilter(QDir.Filter.Dirs | QDir.Filter.NoDotAndDotDot)
        
        self.tree_view = QTreeView()
        self.tree_view.setModel(self.folder_model)
        self.tree_view.setHeaderHidden(True)
        
        for i in range(1, self.folder_model.columnCount()):
            self.tree_view.setColumnHidden(i, True)
            
        layout.addWidget(self.tree_view)

    def set_tracked_folders(self, folders: list):
        """ Обновляет выпадающий список папок """
        self.folder_selector.blockSignals(True)
        self.folder_selector.clear()
        self.folder_selector.addItems(folders)
        self.folder_selector.blockSignals(False)

    def set_root_path(self, path: str):
        self.folder_model.setRootPath(path)
        self.tree_view.setRootIndex(self.folder_model.index(path))

    def _on_folder_changed(self, path: str):
        if path:
            self.set_root_path(path)
            self.root_folder_changed.emit(path)