#!/usr/bin/env python3
"""
GUI Prototype for Emailer Simple Tool
Using PySide6 for cross-platform compatibility

This prototype demonstrates what a GUI version could look like.
Install PySide6 first: pip install PySide6
"""

import sys
import os
from pathlib import Path
from typing import Optional

try:
    from PySide6.QtWidgets import (
        QApplication, QMainWindow, QTabWidget, QWidget, QVBoxLayout, 
        QHBoxLayout, QLabel, QPushButton, QLineEdit, QTextEdit, 
        QTableWidget, QTableWidgetItem, QFileDialog, QMessageBox,
        QProgressBar, QStatusBar, QGroupBox, QFormLayout, QCheckBox,
        QComboBox, QSpinBox, QSplitter, QTreeWidget, QTreeWidgetItem
    )
    from PySide6.QtCore import Qt, QThread, QTimer, Signal
    from PySide6.QtGui import QFont, QIcon, QPixmap
    PYSIDE_AVAILABLE = True
except ImportError:
    PYSIDE_AVAILABLE = False
    print("❌ PySide6 not available. Install with: pip install PySide6")

# Try to import our existing core modules
try:
    from src.emailer_simple_tool.core.campaign_manager import CampaignManager
    from src.emailer_simple_tool.core.email_sender import EmailSender
    from src.emailer_simple_tool.utils.validators import validate_campaign_folder
    CORE_AVAILABLE = True
except ImportError:
    CORE_AVAILABLE = False
    print("ℹ️ Core modules not available - running in demo mode")


class EmailerGUI(QMainWindow):
    """Main GUI window for Emailer Simple Tool"""
    
    def __init__(self):
        super().__init__()
        self.campaign_manager = None
        self.init_ui()
    
    def init_ui(self):
        """Initialize the user interface"""
        self.setWindowTitle("Emailer Simple Tool - GUI Prototype v4.1.0")
        self.setGeometry(100, 100, 1200, 800)
        
        # Create central widget with tabs
        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        
        layout = QVBoxLayout()
        
        # Create tab widget
        self.tabs = QTabWidget()
        
        # Import tab classes
        from gui_tabs import CampaignTab, SMTPTab, PictureTab, SendTab
        
        # Add tabs
        self.campaign_tab = CampaignTab()
        self.smtp_tab = SMTPTab()
        self.picture_tab = PictureTab()
        self.send_tab = SendTab()
        
        self.tabs.addTab(self.campaign_tab, "📁 Campaign")
        self.tabs.addTab(self.smtp_tab, "📧 SMTP")
        self.tabs.addTab(self.picture_tab, "🖼️ Pictures")
        self.tabs.addTab(self.send_tab, "🚀 Send")
        
        layout.addWidget(self.tabs)
        central_widget.setLayout(layout)
        
        # Create status bar
        self.status_bar = QStatusBar()
        self.setStatusBar(self.status_bar)
        self.status_bar.showMessage("Ready - Select a campaign folder to get started")
        
        # Apply modern styling
        self.apply_styling()
    
    def apply_styling(self):
        """Apply modern styling to the application"""
        self.setStyleSheet("""
            QMainWindow {
                background-color: #f8f9fa;
            }
            
            QTabWidget::pane {
                border: 1px solid #dee2e6;
                background-color: white;
                border-radius: 4px;
            }
            
            QTabBar::tab {
                background-color: #e9ecef;
                padding: 12px 20px;
                margin-right: 2px;
                border-top-left-radius: 4px;
                border-top-right-radius: 4px;
                font-weight: 500;
            }
            
            QTabBar::tab:selected {
                background-color: white;
                border-bottom: 3px solid #28a745;
                color: #28a745;
            }
            
            QTabBar::tab:hover {
                background-color: #f8f9fa;
            }
            
            QGroupBox {
                font-weight: 600;
                border: 2px solid #dee2e6;
                border-radius: 8px;
                margin-top: 1ex;
                padding-top: 15px;
                background-color: white;
            }
            
            QGroupBox::title {
                subcontrol-origin: margin;
                left: 15px;
                padding: 0 8px 0 8px;
                color: #495057;
            }
            
            QPushButton {
                background-color: #007bff;
                color: white;
                border: none;
                padding: 10px 20px;
                border-radius: 4px;
                font-weight: 500;
            }
            
            QPushButton:hover {
                background-color: #0056b3;
            }
            
            QPushButton:pressed {
                background-color: #004085;
            }
            
            QLineEdit, QTextEdit, QSpinBox {
                border: 1px solid #ced4da;
                border-radius: 4px;
                padding: 8px;
                background-color: white;
            }
            
            QLineEdit:focus, QTextEdit:focus, QSpinBox:focus {
                border-color: #80bdff;
                outline: 0;
                box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
            }
            
            QTableWidget {
                gridline-color: #dee2e6;
                background-color: white;
                alternate-background-color: #f8f9fa;
            }
            
            QTableWidget::item {
                padding: 8px;
            }
            
            QTreeWidget {
                background-color: white;
                border: 1px solid #dee2e6;
                border-radius: 4px;
            }
            
            QProgressBar {
                border: 1px solid #dee2e6;
                border-radius: 4px;
                text-align: center;
                background-color: #e9ecef;
            }
            
            QProgressBar::chunk {
                background-color: #28a745;
                border-radius: 3px;
            }
            
            QStatusBar {
                background-color: #f8f9fa;
                border-top: 1px solid #dee2e6;
            }
        """)


def main():
    """Main entry point for GUI prototype"""
    if not PYSIDE_AVAILABLE:
        print("❌ PySide6 is required for the GUI prototype")
        print("📦 Install with: pip install PySide6")
        print("🔄 Then run: python gui_prototype.py")
        return 1
    
    app = QApplication(sys.argv)
    app.setApplicationName("Emailer Simple Tool")
    app.setApplicationVersion("4.1.0")
    app.setApplicationDisplayName("Emailer Simple Tool - GUI Prototype")
    
    # Create and show main window
    try:
        window = EmailerGUI()
        window.show()
        
        print("🚀 GUI Prototype launched successfully!")
        print("📝 This is a demonstration of what the GUI could look like")
        print("🔧 Core functionality would be integrated in the full version")
        
        return app.exec()
        
    except Exception as e:
        print(f"❌ Error launching GUI: {e}")
        return 1


if __name__ == "__main__":
    sys.exit(main())
