# plugins/plugin_manager.py

def register(app):
    from PyQt5.QtWidgets import (
        QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton,
        QFileDialog, QScrollArea, QMessageBox
    )
    import os
    import json
    import shutil
    import importlib.util

    plugin_dir = os.path.join(os.path.dirname(__file__))
    config_path = os.path.join(plugin_dir, "enabled_plugins.json")
    tab = QWidget()
    layout = QVBoxLayout()

    if not hasattr(app, "loaded_plugins"):
        app.loaded_plugins = []

    if not hasattr(app, "plugin_refs"):
        app.plugin_refs = {}

    if os.path.exists(config_path):
        with open(config_path, "r") as f:
            plugin_status = json.load(f)
    else:
        plugin_status = {}

    # Área de scroll para muitos plugins
    scroll = QScrollArea()
    scroll_widget = QWidget()
    scroll_layout = QVBoxLayout()

    def save_config():
        with open(config_path, "w") as f:
            json.dump(plugin_status, f, indent=4)

    def activate_plugin(fname):
        if fname in app.plugin_refs:
            QMessageBox.information(tab, "Aviso", f"Plugin '{fname}' já está carregado.")
            return
        try:
            path = os.path.join(plugin_dir, fname)
            spec = importlib.util.spec_from_file_location("plugin", path)
            plugin = importlib.util.module_from_spec(spec)
            spec.loader.exec_module(plugin)
            plugin.register(app)
            app.loaded_plugins.append(fname)
            app.plugin_refs[fname] = plugin
            plugin_status[fname] = True
            save_config()
            refresh_ui()
        except Exception as e:
            QMessageBox.critical(tab, "Erro ao ativar", f"{fname}:\n{e}")

    def deactivate_plugin(fname):
        QMessageBox.information(tab, "Desativação", f"O plugin '{fname}' será desabilitado. Reinicie o app para refletir completamente.")
        plugin_status[fname] = False
        save_config()
        refresh_ui()

    def refresh_ui():
        for i in reversed(range(scroll_layout.count())):
            scroll_layout.itemAt(i).widget().setParent(None)

        for fname in sorted(os.listdir(plugin_dir)):
            if fname.endswith(".py") and fname != "plugin_manager.py":
                row = QHBoxLayout()
                label = QLabel(fname)
                status = QLabel("✅ Ativado" if plugin_status.get(fname, True) else "❌ Desativado")
                btn = QPushButton("Desativar" if plugin_status.get(fname, True) else "Ativar")

                def make_action(name, active):
                    return lambda: deactivate_plugin(name) if active else activate_plugin(name)

                btn.clicked.connect(make_action(fname, plugin_status.get(fname, True)))

                row.addWidget(label)
                row.addWidget(status)
                row.addWidget(btn)
                scroll_layout.addLayout(row)

    def import_plugin():
        file, _ = QFileDialog.getOpenFileName(app, "Importar plugin", "", "Python Files (*.py)")
        if file:
            dst = os.path.join(plugin_dir, os.path.basename(file))
            if os.path.exists(dst):
                QMessageBox.warning(tab, "Aviso", "Esse plugin já existe.")
                return
            shutil.copy(file, dst)
            plugin_status[os.path.basename(file)] = True
            save_config()
            activate_plugin(os.path.basename(file))

    import_btn = QPushButton("📂 Importar novo Plugin (.py)")
    import_btn.clicked.connect(import_plugin)

    scroll_widget.setLayout(scroll_layout)
    scroll.setWidgetResizable(True)
    scroll.setWidget(scroll_widget)

    layout.addWidget(import_btn)
    layout.addWidget(scroll)
    tab.setLayout(layout)

    app.tabs.addTab(tab, "Marketplace de Plugins")
    refresh_ui()