"""Fullscreen display window for showing timers on a separate monitor."""

from PyQt6.QtWidgets import QWidget, QVBoxLayout, QScrollArea, QApplication, QLabel
from PyQt6.QtCore import Qt, pyqtSignal
from PyQt6.QtGui import QFont


class FullscreenDisplay(QWidget):
    closed = pyqtSignal()
    
    def __init__(self, monitor_index=0):
        super().__init__()
        self.monitor_index = monitor_index
        self.timer_widget_mirrors = {}  # Maps original widget to mirror widget
        self.init_ui()
        
    def init_ui(self):
        # Set window flags for fullscreen
        self.setWindowFlags(Qt.WindowType.FramelessWindowHint | Qt.WindowType.WindowStaysOnTopHint)
        self.setStyleSheet("background-color: #1a1a1a;")
        
        # Main layout - timers will split the screen evenly
        self.timers_layout = QVBoxLayout(self)
        self.timers_layout.setContentsMargins(0, 0, 0, 0)
        self.timers_layout.setSpacing(0)
        
        # Position on selected monitor
        self.position_on_monitor()
        
        # Show fullscreen
        self.showFullScreen()
        
    def position_on_monitor(self):
        screens = QApplication.screens()
        if self.monitor_index < len(screens):
            screen = screens[self.monitor_index]
            self.setGeometry(screen.geometry())
        else:
            # Fallback to primary screen
            screen = QApplication.primaryScreen()
            self.setGeometry(screen.geometry())
    
    def add_timer_widget(self, timer_widget):
        """Add a mirror of the timer widget to the fullscreen display."""
        if timer_widget in self.timer_widget_mirrors:
            return  # Already added
        
        # Create a mirror widget that displays the same timer
        from ui.fullscreen_timer_widget import FullscreenTimerWidget
        mirror_widget = FullscreenTimerWidget(timer_widget.timer_model)
        mirror_widget.sync_with(timer_widget)
        
        self.timer_widget_mirrors[timer_widget] = mirror_widget
        self.timers_layout.addWidget(mirror_widget, stretch=1)  # Equal stretch for all timers
        
        # Connect to sync updates
        timer_widget.time_updated.connect(mirror_widget.update_display)
        timer_widget.state_changed.connect(mirror_widget.update_state)
        
        # Update all timer sizes
        self.update_timer_sizes()
        
    def remove_timer_widget(self, timer_widget):
        """Remove the mirror widget when the original is removed."""
        if timer_widget in self.timer_widget_mirrors:
            mirror_widget = self.timer_widget_mirrors[timer_widget]
            self.timers_layout.removeWidget(mirror_widget)
            mirror_widget.deleteLater()
            del self.timer_widget_mirrors[timer_widget]
            
            # Update remaining timer sizes
            self.update_timer_sizes()
    
    def update_timer_sizes(self):
        """Update font sizes based on number of timers."""
        num_timers = len(self.timer_widget_mirrors)
        if num_timers == 0:
            return
        
        # Calculate appropriate font size based on number of timers
        # More timers = smaller font to fit better
        if num_timers == 1:
            time_font_size = 120
            title_font_size = 40
        elif num_timers == 2:
            time_font_size = 80
            title_font_size = 30
        elif num_timers == 3:
            time_font_size = 60
            title_font_size = 24
        elif num_timers == 4:
            time_font_size = 50
            title_font_size = 20
        else:
            time_font_size = 40
            title_font_size = 16
        
        # Update all mirror widgets
        for mirror_widget in self.timer_widget_mirrors.values():
            mirror_widget.update_font_sizes(time_font_size, title_font_size)
    
    def keyPressEvent(self, event):
        # Allow ESC key to close the fullscreen display
        if event.key() == Qt.Key.Key_Escape:
            self.close()
        super().keyPressEvent(event)
    
    def closeEvent(self, event):
        # Clean up mirror widgets
        for mirror_widget in list(self.timer_widget_mirrors.values()):
            mirror_widget.deleteLater()
        self.timer_widget_mirrors.clear()
        
        self.closed.emit()
        super().closeEvent(event)