import importlib
import importlib.util
import os
from typing import Dict, List, Type

from modules.launcher.plugin_base import PluginBase


class PluginManager:
    """
    Manages launcher plugins.
    """

    def __init__(self):
        self.plugins: Dict[str, PluginBase] = {}
        self.plugin_classes: Dict[str, Type[PluginBase]] = {}
        self.active_plugins: List[str] = []

        # Load built-in plugins
        self._load_builtin_plugins()

        # Load external plugins
        self._load_external_plugins()

        # Activate default plugins
        self._activate_default_plugins()

    def _load_builtin_plugins(self):
        """Load built-in plugins from the plugins directory."""
        plugins_dir = os.path.join(os.path.dirname(__file__), "plugins")

        if not os.path.exists(plugins_dir):
            return

        for filename in os.listdir(plugins_dir):
            if filename.endswith(".py") and not filename.startswith("_"):
                plugin_name = filename[:-3]  # Remove .py extension
                self._load_plugin_from_file(plugins_dir, plugin_name)

    def _load_external_plugins(self):
        """Load external plugins from user directory."""
        # Could be implemented to load from ~/.config/launcher/plugins/
        pass

    def _load_plugin_from_file(self, plugins_dir: str, plugin_name: str):
        """Load a plugin from a Python file."""
        try:
            plugin_path = os.path.join(plugins_dir, f"{plugin_name}.py")
            spec = importlib.util.spec_from_file_location(
                f"modules.launcher.plugins.{plugin_name}", plugin_path
            )

            if spec and spec.loader:
                module = importlib.util.module_from_spec(spec)

                # Add the module to sys.modules to support relative imports
                import sys

                sys.modules[f"modules.launcher.plugins.{plugin_name}"] = module

                spec.loader.exec_module(module)

                # Look for plugin class
                for attr_name in dir(module):
                    attr = getattr(module, attr_name)
                    if (
                        isinstance(attr, type)
                        and issubclass(attr, PluginBase)
                        and attr != PluginBase
                    ):
                        self.plugin_classes[plugin_name] = attr
                        break

        except Exception as e:
            print(f"Failed to load plugin {plugin_name}: {e}")

    def _activate_default_plugins(self):
        """Activate default plugins."""
        default_plugins = [
            "applications",
            "calculator",
            "system",
            "clipboard",
            "power",
            "caffeine",
            "screencapture",
            "emoji",
            "wallpaper",
            "websearch",
            "kanban",
            "calendar",
            "reminders",
            "otp",
            "password",
            "bookmarks",
            "process",
            "bash_scripts",
            "tmux",
        ]

        for plugin_name in default_plugins:
            self.activate_plugin(plugin_name)

    def activate_plugin(self, plugin_name: str) -> bool:
        """Activate a plugin by name."""
        if plugin_name in self.plugins:
            # Already activated
            return True

        if plugin_name not in self.plugin_classes:
            return False

        try:
            # Instantiate plugin
            plugin_class = self.plugin_classes[plugin_name]
            plugin_instance = plugin_class()

            # Initialize plugin
            plugin_instance.initialize()

            # Store plugin
            self.plugins[plugin_name] = plugin_instance
            self.active_plugins.append(plugin_name)

            return True

        except Exception as e:
            print(f"Failed to activate plugin {plugin_name}: {e}")
            return False

    def deactivate_plugin(self, plugin_name: str) -> bool:
        """Deactivate a plugin by name."""
        if plugin_name not in self.plugins:
            return False

        try:
            # Cleanup plugin
            plugin = self.plugins[plugin_name]
            plugin.cleanup()

            # Remove from active plugins
            del self.plugins[plugin_name]
            if plugin_name in self.active_plugins:
                self.active_plugins.remove(plugin_name)

            return True

        except Exception as e:
            print(f"Failed to deactivate plugin {plugin_name}: {e}")
            return False

    def get_active_plugins(self) -> List[PluginBase]:
        """Get list of active plugin instances."""
        return [
            self.plugins[name] for name in self.active_plugins if name in self.plugins
        ]

    def get_plugin_names(self) -> List[str]:
        """Get list of available plugin names."""
        return list(self.plugin_classes.keys())

    def get_active_plugin_names(self) -> List[str]:
        """Get list of active plugin names."""
        return self.active_plugins.copy()

    def reload_plugin(self, plugin_name: str) -> bool:
        """Reload a plugin."""
        was_active = plugin_name in self.active_plugins

        # Deactivate if active
        if was_active:
            self.deactivate_plugin(plugin_name)

        # Remove from classes
        if plugin_name in self.plugin_classes:
            del self.plugin_classes[plugin_name]

        # Reload from file
        plugins_dir = os.path.join(os.path.dirname(__file__), "plugins")
        self._load_plugin_from_file(plugins_dir, plugin_name)

        # Reactivate if it was active
        if was_active and plugin_name in self.plugin_classes:
            return self.activate_plugin(plugin_name)

        return plugin_name in self.plugin_classes