"""
EU-Utility - Dashboard (Core Framework Component)

Built-in dashboard - not a plugin. Provides hooks for plugins to add widgets.
"""

from PyQt6.QtWidgets import (
    QWidget, QVBoxLayout, QHBoxLayout, QLabel,
    QGridLayout, QFrame, QScrollArea, QPushButton
)
from PyQt6.QtCore import Qt


class DashboardView(QWidget):
    """Main dashboard - built into the framework.
    
    Plugins can register dashboard widgets via PluginAPI:
        api.register_dashboard_widget(
            name="My Widget",
            widget=my_widget,
            position="left",  # left, right, center
            priority=10
        )
    """
    
    def __init__(self, overlay_window, parent=None):
        super().__init__(parent)
        self.overlay = overlay_window
        self.widgets = []  # Registered dashboard widgets
        
        self._setup_ui()
    
    def _setup_ui(self):
        """Create the dashboard UI."""
        layout = QVBoxLayout(self)
        layout.setSpacing(15)
        layout.setContentsMargins(20, 20, 20, 20)
        
        # Header
        header = QLabel("📊 Dashboard")
        header.setStyleSheet("font-size: 24px; font-weight: bold; color: white;")
        layout.addWidget(header)
        
        # Scroll area for widgets
        scroll = QScrollArea()
        scroll.setWidgetResizable(True)
        scroll.setFrameShape(QFrame.Shape.NoFrame)
        scroll.setStyleSheet("background: transparent; border: none;")
        
        self.content = QWidget()
        self.content_layout = QVBoxLayout(self.content)
        self.content_layout.setSpacing(15)
        self.content_layout.setAlignment(Qt.AlignmentFlag.AlignTop)
        
        # Add built-in widgets
        self._add_builtin_widgets()
        
        scroll.setWidget(self.content)
        layout.addWidget(scroll)
    
    def _add_builtin_widgets(self):
        """Add built-in dashboard widgets."""
        # Welcome widget
        welcome = self._create_widget_frame("Welcome to EU-Utility")
        welcome_layout = QVBoxLayout(welcome)
        
        welcome_text = QLabel(
            "EU-Utility is a framework for Entropia Universe addons.\n\n"
            "Install plugins from the Plugin Store to get started!"
        )
        welcome_text.setStyleSheet("color: rgba(255,255,255,150);")
        welcome_text.setWordWrap(True)
        welcome_layout.addWidget(welcome_text)
        
        store_btn = QPushButton("🔌 Open Plugin Store")
        store_btn.setStyleSheet("""
            QPushButton {
                background-color: #4a9eff;
                color: white;
                padding: 10px 20px;
                border: none;
                border-radius: 4px;
                font-weight: bold;
            }
            QPushButton:hover {
                background-color: #3a8eef;
            }
        """)
        store_btn.clicked.connect(self._open_plugin_store)
        welcome_layout.addWidget(store_btn)
        
        self.content_layout.addWidget(welcome)
        
        # Quick stats widget (placeholder)
        stats = self._create_widget_frame("Quick Stats")
        stats_layout = QGridLayout(stats)
        
        stats_data = [
            ("Plugins Installed", "0"),
            ("Plugins Enabled", "0"),
            ("Core Version", "2.1.0"),
        ]
        
        for i, (label, value) in enumerate(stats_data):
            label_widget = QLabel(f"{label}:")
            label_widget.setStyleSheet("color: rgba(255,255,255,150);")
            stats_layout.addWidget(label_widget, i, 0)
            
            value_widget = QLabel(value)
            value_widget.setStyleSheet("color: #4ecdc4; font-weight: bold;")
            stats_layout.addWidget(value_widget, i, 1)
        
        self.content_layout.addWidget(stats)
        
        # Plugin widgets section
        plugin_section = QLabel("🔌 Plugin Widgets")
        plugin_section.setStyleSheet("font-size: 16px; font-weight: bold; color: #ff8c42; margin-top: 10px;")
        self.content_layout.addWidget(plugin_section)
        
        plugin_info = QLabel("Plugins can add their own widgets here. Install some plugins to see them!")
        plugin_info.setStyleSheet("color: rgba(255,255,255,100); font-style: italic;")
        self.content_layout.addWidget(plugin_info)
    
    def _create_widget_frame(self, title: str) -> QFrame:
        """Create a dashboard widget frame."""
        frame = QFrame()
        frame.setStyleSheet("""
            QFrame {
                background-color: rgba(35, 40, 55, 200);
                border: 1px solid rgba(100, 110, 130, 80);
                border-radius: 8px;
            }
        """)
        
        layout = QVBoxLayout(frame)
        layout.setSpacing(10)
        layout.setContentsMargins(15, 15, 15, 15)
        
        # Title
        title_label = QLabel(title)
        title_label.setStyleSheet("font-size: 14px; font-weight: bold; color: white;")
        layout.addWidget(title_label)
        
        # Separator
        sep = QFrame()
        sep.setFrameShape(QFrame.Shape.HLine)
        sep.setStyleSheet("background-color: rgba(100, 110, 130, 80);")
        sep.setFixedHeight(1)
        layout.addWidget(sep)
        
        return frame
    
    def _open_plugin_store(self):
        """Open the plugin store."""
        # Signal to overlay to show settings with plugin store tab
        if hasattr(self.overlay, 'show_settings'):
            self.overlay.show_settings(tab="Plugin Store")
    
    def register_widget(self, name: str, widget: QWidget, priority: int = 100):
        """Register a widget from a plugin.
        
        Args:
            name: Widget name (shown as title)
            widget: QWidget to display
            priority: Lower numbers appear first
        """
        # Wrap in frame
        frame = self._create_widget_frame(name)
        frame.layout().addWidget(widget)
        
        # Add to layout based on priority
        self.content_layout.addWidget(frame)
        
        self.widgets.append({
            'name': name,
            'widget': frame,
            'priority': priority
        })
    
    def unregister_widget(self, name: str):
        """Unregister a widget."""
        for widget_info in self.widgets:
            if widget_info['name'] == name:
                widget_info['widget'].deleteLater()
                self.widgets.remove(widget_info)
                break