#!/usr/bin/env python3
"""
Unified Dashboard GUI for PunimTag features
Designed with web migration in mind - single window with menu bar and content area
"""

import os
import threading
import tkinter as tk
from tkinter import ttk, messagebox
from typing import Dict, Optional, Callable

from gui_core import GUICore
from identify_panel import IdentifyPanel


class DashboardGUI:
    """Unified Dashboard with menu bar and content area for all features.
    
    Designed to be web-migration friendly with clear separation between
    navigation (menu bar) and content (panels).
    """

    def __init__(self, gui_core: GUICore, db_manager=None, face_processor=None, on_scan=None, on_process=None, on_identify=None):
        self.gui_core = gui_core
        self.db_manager = db_manager
        self.face_processor = face_processor
        self.on_scan = on_scan
        self.on_process = on_process
        self.on_identify = on_identify
        
        # Panel management for future web migration
        self.panels: Dict[str, ttk.Frame] = {}
        self.current_panel: Optional[str] = None
        self.root: Optional[tk.Tk] = None

    def open(self) -> int:
        """Open the unified dashboard with menu bar and content area"""
        self.root = tk.Tk()
        self.root.title("PunimTag - Unified Dashboard")
        self.root.resizable(True, True)
        self.root.withdraw()

        # Make window full screen - use geometry instead of state for better compatibility
        try:
            # Try Windows-style maximized state first
            self.root.state('zoomed')
        except tk.TclError:
            try:
                # Try Linux-style maximized attribute
                self.root.attributes('-zoomed', True)
            except tk.TclError:
                # Fallback: set geometry to screen size
                screen_width = self.root.winfo_screenwidth()
                screen_height = self.root.winfo_screenheight()
                self.root.geometry(f"{screen_width}x{screen_height}+0+0")
        
        # Get screen dimensions for dynamic sizing
        screen_width = self.root.winfo_screenwidth()
        screen_height = self.root.winfo_screenheight()
        
        # Set minimum window size
        self.root.minsize(800, 600)

        # Create main container with proper grid configuration
        main_container = ttk.Frame(self.root)
        main_container.pack(fill=tk.BOTH, expand=True)
        
        # Configure main container grid weights for responsiveness
        main_container.columnconfigure(0, weight=1)
        main_container.rowconfigure(0, weight=0)  # Menu bar - fixed height
        main_container.rowconfigure(1, weight=1)  # Content area - expandable
        
        # Add window resize handler for dynamic responsiveness
        self.root.bind('<Configure>', self._on_window_resize)

        # Create menu bar
        self._create_menu_bar(main_container)
        
        # Create content area
        self._create_content_area(main_container)
        
        # Initialize panels
        self._initialize_panels()
        
        # Show default panel
        self.show_panel("home")

        # Show window
        self.root.deiconify()
        self.root.mainloop()
        return 0

    def _create_menu_bar(self, parent: ttk.Frame):
        """Create the top menu bar with all functionality buttons"""
        menu_frame = ttk.Frame(parent)
        menu_frame.grid(row=0, column=0, sticky=(tk.W, tk.E), padx=15, pady=10)
        menu_frame.columnconfigure(0, weight=0)  # Title - fixed width
        menu_frame.columnconfigure(1, weight=1)  # Buttons - expandable
        menu_frame.columnconfigure(2, weight=0)  # Status - fixed width
        
        # Title with larger font for full screen
        title_label = tk.Label(menu_frame, text="PunimTag", font=("Arial", 20, "bold"))
        title_label.grid(row=0, column=0, padx=(0, 30), sticky=tk.W)
        
        # Create buttons frame for better organization
        buttons_frame = ttk.Frame(menu_frame)
        buttons_frame.grid(row=0, column=1, sticky=(tk.W, tk.E), padx=20)
        
        # Menu buttons with larger size for full screen
        menu_buttons = [
            ("📁 Scan", "scan", "Scan folders and add photos"),
            ("🔍 Process", "process", "Detect faces in photos"),
            ("👤 Identify", "identify", "Identify faces in photos"),
            ("🔗 Auto-Match", "auto_match", "Find and confirm matching faces"),
            ("🔎 Search", "search", "Search photos by person name"),
            ("✏️ Modify", "modify", "View and modify identified faces"),
            ("🏷️ Tags", "tags", "Manage photo tags"),
        ]
        
        for i, (text, panel_name, tooltip) in enumerate(menu_buttons):
            btn = ttk.Button(
                buttons_frame, 
                text=text, 
                command=lambda p=panel_name: self.show_panel(p),
                width=12  # Fixed width for consistent layout
            )
            btn.grid(row=0, column=i, padx=3, sticky=tk.W)
            
            # Add tooltip functionality
            self._add_tooltip(btn, tooltip)
        
        # Status/Info area with better styling
        status_frame = ttk.Frame(menu_frame)
        status_frame.grid(row=0, column=2, sticky=tk.E, padx=(20, 0))
        
        self.status_label = tk.Label(status_frame, text="Ready", foreground="#666", font=("Arial", 10))
        self.status_label.pack(side=tk.RIGHT)
        
        # Add a subtle separator line below the menu
        separator = ttk.Separator(parent, orient='horizontal')
        separator.grid(row=1, column=0, sticky=(tk.W, tk.E), padx=15, pady=(0, 5))

    def _create_content_area(self, parent: ttk.Frame):
        """Create the main content area where panels will be displayed"""
        self.content_frame = ttk.Frame(parent)
        self.content_frame.grid(row=2, column=0, sticky=(tk.W, tk.E, tk.N, tk.S), padx=15, pady=(0, 15))
        
        # Configure content frame to expand
        self.content_frame.columnconfigure(0, weight=1)
        self.content_frame.rowconfigure(0, weight=1)
        
        # Add a subtle border
        self.content_frame.configure(relief='sunken', borderwidth=1)

    def _initialize_panels(self):
        """Initialize all panels (currently placeholders)"""
        # Home panel (default)
        self.panels["home"] = self._create_home_panel()
        
        # Functional panels (placeholders for now)
        self.panels["scan"] = self._create_scan_panel()
        self.panels["process"] = self._create_process_panel()
        self.panels["identify"] = self._create_identify_panel()
        self.panels["auto_match"] = self._create_auto_match_panel()
        self.panels["search"] = self._create_search_panel()
        self.panels["modify"] = self._create_modify_panel()
        self.panels["tags"] = self._create_tags_panel()

    def show_panel(self, panel_name: str):
        """Show the specified panel in the content area"""
        if panel_name not in self.panels:
            messagebox.showerror("Error", f"Panel '{panel_name}' not found", parent=self.root)
            return
        
        # Hide current panel
        if self.current_panel:
            self.panels[self.current_panel].grid_remove()
        
        # Show new panel
        self.panels[panel_name].grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S), padx=15, pady=15)
        self.current_panel = panel_name
        
        # Update status
        self.status_label.config(text=f"Viewing: {panel_name.replace('_', ' ').title()}")

    def _add_tooltip(self, widget, text):
        """Add a simple tooltip to a widget"""
        def show_tooltip(event):
            tooltip = tk.Toplevel()
            tooltip.wm_overrideredirect(True)
            tooltip.wm_geometry(f"+{event.x_root+10}+{event.y_root+10}")
            label = ttk.Label(tooltip, text=text, background="#ffffe0", relief="solid", borderwidth=1)
            label.pack()
            widget.tooltip = tooltip
        
        def hide_tooltip(event):
            if hasattr(widget, 'tooltip'):
                widget.tooltip.destroy()
                del widget.tooltip
        
        widget.bind("<Enter>", show_tooltip)
        widget.bind("<Leave>", hide_tooltip)

    def _on_window_resize(self, event):
        """Handle window resize events for dynamic responsiveness"""
        # Only handle resize events for the main window, not child widgets
        if event.widget == self.root:
            # Update status with current window size
            width = self.root.winfo_width()
            height = self.root.winfo_height()
            self.status_label.config(text=f"Ready - {width}x{height}")
            
            # Force update of all panels to ensure proper resizing
            if hasattr(self, 'identify_panel') and self.identify_panel:
                # Update identify panel layout if it's active
                if self.current_panel == "identify":
                    self.identify_panel.update_layout()

    def _create_home_panel(self) -> ttk.Frame:
        """Create the home/welcome panel"""
        panel = ttk.Frame(self.content_frame)
        
        # Configure panel grid for responsiveness
        panel.columnconfigure(0, weight=1)
        panel.rowconfigure(0, weight=1)
        
        # Welcome content
        welcome_frame = ttk.Frame(panel)
        welcome_frame.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S), padx=20, pady=20)
        welcome_frame.columnconfigure(0, weight=1)
        welcome_frame.rowconfigure(0, weight=1)
        
        # Center the content
        center_frame = ttk.Frame(welcome_frame)
        center_frame.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        center_frame.columnconfigure(0, weight=1)
        
        # Title with larger font for full screen
        title_label = tk.Label(center_frame, text="Welcome to PunimTag", font=("Arial", 32, "bold"))
        title_label.grid(row=0, column=0, pady=(0, 30))
        
        # Description with larger font
        desc_text = (
            "PunimTag is a powerful photo face recognition and tagging system.\n\n"
            "Use the menu above to access different features:\n\n"
            "• 📁 Scan - Add photos to your collection\n"
            "• 🔍 Process - Detect faces in photos\n"
            "• 👤 Identify - Identify people in photos\n"
            "• 🔗 Auto-Match - Find matching faces automatically\n"
            "• 🔎 Search - Find photos by person name\n"
            "• ✏️ Modify - Edit face identifications\n"
            "• 🏷️ Tags - Manage photo tags\n\n"
            "Select a feature from the menu to get started!"
        )
        
        desc_label = tk.Label(center_frame, text=desc_text, font=("Arial", 14), justify=tk.LEFT)
        desc_label.grid(row=1, column=0, pady=(0, 20))
        
        return panel

    def _create_scan_panel(self) -> ttk.Frame:
        """Create the scan panel (migrated from original dashboard)"""
        panel = ttk.Frame(self.content_frame)
        
        # Configure panel grid for responsiveness
        panel.columnconfigure(0, weight=1)
        panel.rowconfigure(1, weight=1)
        
        # Title with larger font for full screen
        title_label = tk.Label(panel, text="📁 Scan Photos", font=("Arial", 24, "bold"))
        title_label.grid(row=0, column=0, sticky=tk.W, pady=(0, 20))
        
        # Scan form
        form_frame = ttk.LabelFrame(panel, text="Scan Configuration", padding="20")
        form_frame.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S), pady=(0, 20))
        form_frame.columnconfigure(0, weight=1)
        
        # Folder selection
        folder_frame = ttk.Frame(form_frame)
        folder_frame.grid(row=0, column=0, sticky=(tk.W, tk.E), pady=(0, 15))
        folder_frame.columnconfigure(0, weight=1)
        
        tk.Label(folder_frame, text="Folder to scan:", font=("Arial", 12)).grid(row=0, column=0, sticky=tk.W)
        
        folder_input_frame = ttk.Frame(folder_frame)
        folder_input_frame.grid(row=1, column=0, sticky=(tk.W, tk.E), pady=(5, 0))
        folder_input_frame.columnconfigure(0, weight=1)
        
        self.folder_var = tk.StringVar()
        folder_entry = tk.Entry(folder_input_frame, textvariable=self.folder_var, font=("Arial", 11))
        folder_entry.grid(row=0, column=0, sticky=(tk.W, tk.E), padx=(0, 10))
        
        def browse_folder():
            from tkinter import filedialog
            folder_path = filedialog.askdirectory(title="Select folder to scan for photos")
            if folder_path:
                self.folder_var.set(folder_path)
        
        browse_btn = ttk.Button(folder_input_frame, text="Browse", command=browse_folder)
        browse_btn.grid(row=0, column=1)
        
        # Recursive option
        self.recursive_var = tk.BooleanVar(value=True)
        recursive_check = tk.Checkbutton(
            form_frame,
            text="Include photos in sub-folders",
            variable=self.recursive_var,
            font=("Arial", 11)
        )
        recursive_check.grid(row=1, column=0, sticky=tk.W, pady=(15, 0))
        
        # Action button
        scan_btn = ttk.Button(form_frame, text="🔍 Start Scan", command=self._run_scan)
        scan_btn.grid(row=2, column=0, sticky=tk.W, pady=(20, 0))
        
        return panel

    def _create_process_panel(self) -> ttk.Frame:
        """Create the process panel (migrated from original dashboard)"""
        panel = ttk.Frame(self.content_frame)
        
        # Configure panel grid for responsiveness
        panel.columnconfigure(0, weight=1)
        panel.rowconfigure(1, weight=1)
        
        # Title with larger font for full screen
        title_label = tk.Label(panel, text="🔍 Process Faces", font=("Arial", 24, "bold"))
        title_label.grid(row=0, column=0, sticky=tk.W, pady=(0, 20))
        
        # Process form
        form_frame = ttk.LabelFrame(panel, text="Processing Configuration", padding="20")
        form_frame.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S), pady=(0, 20))
        form_frame.columnconfigure(0, weight=1)
        
        # Limit option
        limit_frame = ttk.Frame(form_frame)
        limit_frame.grid(row=0, column=0, sticky=(tk.W, tk.E), pady=(0, 15))
        
        self.limit_enabled = tk.BooleanVar(value=False)
        limit_check = tk.Checkbutton(limit_frame, text="Limit processing to", variable=self.limit_enabled, font=("Arial", 11))
        limit_check.grid(row=0, column=0, sticky=tk.W)
        
        self.limit_var = tk.StringVar(value="50")
        limit_entry = tk.Entry(limit_frame, textvariable=self.limit_var, width=8, font=("Arial", 11))
        limit_entry.grid(row=0, column=1, padx=(10, 5))
        
        tk.Label(limit_frame, text="photos", font=("Arial", 11)).grid(row=0, column=2, sticky=tk.W)
        
        # Action button
        process_btn = ttk.Button(form_frame, text="🚀 Start Processing", command=self._run_process)
        process_btn.grid(row=1, column=0, sticky=tk.W, pady=(20, 0))
        
        return panel

    def _create_identify_panel(self) -> ttk.Frame:
        """Create the identify panel with full functionality"""
        panel = ttk.Frame(self.content_frame)
        
        # Configure panel grid for responsiveness
        panel.columnconfigure(0, weight=1)
        panel.rowconfigure(1, weight=1)
        
        # Title with larger font for full screen
        title_label = tk.Label(panel, text="👤 Identify Faces", font=("Arial", 24, "bold"))
        title_label.grid(row=0, column=0, sticky=tk.W, pady=(0, 20))
        
        # Create the identify panel if we have the required dependencies
        if self.db_manager and self.face_processor:
            self.identify_panel = IdentifyPanel(panel, self.db_manager, self.face_processor, self.gui_core)
            identify_frame = self.identify_panel.create_panel()
            identify_frame.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        else:
            # Fallback placeholder if dependencies are not available
            placeholder_frame = ttk.LabelFrame(panel, text="Configuration Required", padding="20")
            placeholder_frame.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
            placeholder_frame.columnconfigure(0, weight=1)
            placeholder_frame.rowconfigure(0, weight=1)
            
            placeholder_text = (
                "Identify panel requires database and face processor to be configured.\n\n"
                "This will contain the full face identification interface\n"
                "currently available in the separate Identify window.\n\n"
                "Features will include:\n"
                "• Face browsing and identification\n"
                "• Similar face matching\n"
                "• Person management\n"
                "• Batch processing options"
            )
            
            placeholder_label = tk.Label(placeholder_frame, text=placeholder_text, font=("Arial", 14), justify=tk.LEFT)
            placeholder_label.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        
        return panel

    def _create_auto_match_panel(self) -> ttk.Frame:
        """Create the auto-match panel (placeholder)"""
        panel = ttk.Frame(self.content_frame)
        
        # Configure panel grid for responsiveness
        panel.columnconfigure(0, weight=1)
        panel.rowconfigure(1, weight=1)
        
        title_label = tk.Label(panel, text="🔗 Auto-Match Faces", font=("Arial", 24, "bold"))
        title_label.grid(row=0, column=0, sticky=tk.W, pady=(0, 20))
        
        placeholder_frame = ttk.LabelFrame(panel, text="Coming Soon", padding="20")
        placeholder_frame.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        placeholder_frame.columnconfigure(0, weight=1)
        placeholder_frame.rowconfigure(0, weight=1)
        
        placeholder_text = "Auto-Match functionality will be integrated here."
        placeholder_label = tk.Label(placeholder_frame, text=placeholder_text, font=("Arial", 14))
        placeholder_label.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        
        return panel

    def _create_search_panel(self) -> ttk.Frame:
        """Create the search panel (placeholder)"""
        panel = ttk.Frame(self.content_frame)
        
        # Configure panel grid for responsiveness
        panel.columnconfigure(0, weight=1)
        panel.rowconfigure(1, weight=1)
        
        title_label = tk.Label(panel, text="🔎 Search Photos", font=("Arial", 24, "bold"))
        title_label.grid(row=0, column=0, sticky=tk.W, pady=(0, 20))
        
        placeholder_frame = ttk.LabelFrame(panel, text="Coming Soon", padding="20")
        placeholder_frame.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        placeholder_frame.columnconfigure(0, weight=1)
        placeholder_frame.rowconfigure(0, weight=1)
        
        placeholder_text = "Search functionality will be integrated here."
        placeholder_label = tk.Label(placeholder_frame, text=placeholder_text, font=("Arial", 14))
        placeholder_label.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        
        return panel

    def _create_modify_panel(self) -> ttk.Frame:
        """Create the modify panel (placeholder)"""
        panel = ttk.Frame(self.content_frame)
        
        # Configure panel grid for responsiveness
        panel.columnconfigure(0, weight=1)
        panel.rowconfigure(1, weight=1)
        
        title_label = tk.Label(panel, text="✏️ Modify Identified", font=("Arial", 24, "bold"))
        title_label.grid(row=0, column=0, sticky=tk.W, pady=(0, 20))
        
        placeholder_frame = ttk.LabelFrame(panel, text="Coming Soon", padding="20")
        placeholder_frame.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        placeholder_frame.columnconfigure(0, weight=1)
        placeholder_frame.rowconfigure(0, weight=1)
        
        placeholder_text = "Modify functionality will be integrated here."
        placeholder_label = tk.Label(placeholder_frame, text=placeholder_text, font=("Arial", 14))
        placeholder_label.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        
        return panel

    def _create_tags_panel(self) -> ttk.Frame:
        """Create the tags panel (placeholder)"""
        panel = ttk.Frame(self.content_frame)
        
        # Configure panel grid for responsiveness
        panel.columnconfigure(0, weight=1)
        panel.rowconfigure(1, weight=1)
        
        title_label = tk.Label(panel, text="🏷️ Tag Manager", font=("Arial", 24, "bold"))
        title_label.grid(row=0, column=0, sticky=tk.W, pady=(0, 20))
        
        placeholder_frame = ttk.LabelFrame(panel, text="Coming Soon", padding="20")
        placeholder_frame.grid(row=1, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        placeholder_frame.columnconfigure(0, weight=1)
        placeholder_frame.rowconfigure(0, weight=1)
        
        placeholder_text = "Tag management functionality will be integrated here."
        placeholder_label = tk.Label(placeholder_frame, text=placeholder_text, font=("Arial", 14))
        placeholder_label.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
        
        return panel

    def _run_scan(self):
        """Run the scan operation (migrated from original dashboard)"""
        folder = self.folder_var.get().strip()
        recursive = bool(self.recursive_var.get())
        
        if not folder:
            messagebox.showwarning("Scan", "Please enter a folder path.", parent=self.root)
            return
        
        # Validate folder path using path utilities
        from path_utils import validate_path_exists, normalize_path
        try:
            folder = normalize_path(folder)
            if not validate_path_exists(folder):
                messagebox.showerror("Scan", f"Folder does not exist or is not accessible: {folder}", parent=self.root)
                return
        except ValueError as e:
            messagebox.showerror("Scan", f"Invalid folder path: {e}", parent=self.root)
            return
        
        if not callable(self.on_scan):
            messagebox.showinfo("Scan", "Scan functionality is not wired yet.", parent=self.root)
            return

        def worker():
            try:
                self.status_label.config(text="Scanning...")
                result = self.on_scan(folder, recursive)
                messagebox.showinfo("Scan", f"Scan completed. Result: {result}", parent=self.root)
                self.status_label.config(text="Ready")
            except Exception as e:
                messagebox.showerror("Scan", f"Error during scan: {e}", parent=self.root)
                self.status_label.config(text="Ready")

        threading.Thread(target=worker, daemon=True).start()

    def _run_process(self):
        """Run the process operation (migrated from original dashboard)"""
        if not callable(self.on_process):
            messagebox.showinfo("Process", "Process functionality is not wired yet.", parent=self.root)
            return
        
        limit_value = None
        if self.limit_enabled.get():
            try:
                limit_value = int(self.limit_var.get().strip())
                if limit_value <= 0:
                    raise ValueError
            except Exception:
                messagebox.showerror("Process", "Please enter a valid positive integer for limit.", parent=self.root)
                return

        def worker():
            try:
                self.status_label.config(text="Processing...")
                result = self.on_process(limit_value)
                messagebox.showinfo("Process", f"Processing completed. Result: {result}", parent=self.root)
                self.status_label.config(text="Ready")
            except Exception as e:
                messagebox.showerror("Process", f"Error during processing: {e}", parent=self.root)
                self.status_label.config(text="Ready")

        threading.Thread(target=worker, daemon=True).start()