"""
MainWindow - Finestra principale dell'applicazione desktop
"""

from PyQt6.QtWidgets import (
    QMainWindow, QWidget, QVBoxLayout, QMenuBar,
    QMenu, QMessageBox, QLabel, QStatusBar
)
from PyQt6.QtCore import Qt
from PyQt6.QtGui import QAction, QKeySequence
from desktop.ui.chat_widget import ChatWidget


class MainWindow(QMainWindow):
    """Finestra principale di Jarvis-Cognitive Desktop"""

    def __init__(self, kernel):
        super().__init__()
        self.kernel = kernel

        self.init_ui()
        self.apply_stylesheet()

    def init_ui(self):
        """Inizializza l'interfaccia utente"""

        # Titolo dinamico basato su profilo
        profile_names = {
            'aurelio': 'Marco Aurelio (Imperatore Filosofo)',
            'warren': 'Warren Mentor (Investment Advisor)'
        }

        profile_display = profile_names.get(
            self.kernel.active_profile,
            self.kernel.active_profile.capitalize()
        )

        # Titolo e dimensioni
        self.setWindowTitle(f"Jarvis - {profile_display}")
        self.setGeometry(100, 100, 900, 700)

        # Widget centrale: ChatWidget
        self.chat_widget = ChatWidget(self.kernel)
        self.setCentralWidget(self.chat_widget)

        # Menu bar
        self.create_menu_bar()

        # Status bar dinamico
        self.statusBar = QStatusBar()
        self.setStatusBar(self.statusBar)
        philosopher_name = profile_display.split('(')[0].strip()
        self.statusBar.showMessage(f"Pronto | {philosopher_name} ti dà il benvenuto")

    def create_menu_bar(self):
        """Crea la barra dei menu"""
        menubar = self.menuBar()

        # Menu File
        file_menu = menubar.addMenu("&File")

        # Azione: Indicizza Documento
        index_action = QAction("📄 Indicizza Documento", self)
        index_action.setShortcut(QKeySequence("Ctrl+O"))
        index_action.triggered.connect(self.chat_widget.upload_document)
        file_menu.addAction(index_action)

        file_menu.addSeparator()

        # Azione: Esci
        exit_action = QAction("Esci", self)
        exit_action.setShortcut(QKeySequence("Ctrl+Q"))
        exit_action.triggered.connect(self.close)
        file_menu.addAction(exit_action)

        # Menu Chat
        chat_menu = menubar.addMenu("&Chat")

        # Azione: Nuova Conversazione
        new_chat_action = QAction("🗑️ Pulisci Chat", self)
        new_chat_action.setShortcut(QKeySequence("Ctrl+N"))
        new_chat_action.triggered.connect(self.chat_widget.clear_chat)
        chat_menu.addAction(new_chat_action)

        # Menu Aiuto
        help_menu = menubar.addMenu("&Aiuto")

        # Azione: Info
        about_action = QAction("ℹ️ Info", self)
        about_action.triggered.connect(self.show_about)
        help_menu.addAction(about_action)

    def show_about(self):
        """Mostra finestra About con info dinamiche profilo"""
        profile_info = {
            'aurelio': ('Marco Aurelio', 'Imperatore Romano e Filosofo Stoico', '121-180 d.C.'),
            'warren': ('Warren Mentor', 'Deep Value Investment Advisor', 'Buffett/Munger/Graham')
        }

        name, title, period = profile_info.get(
            self.kernel.active_profile,
            (self.kernel.active_profile.capitalize(), 'Filosofo Stoico', 'Sconosciuto')
        )

        QMessageBox.about(
            self,
            f"Info - Jarvis {name}",
            f"<h2>Jarvis - {name}</h2>"
            f"<p><b>Versione:</b> 2.0 Desktop (PyQt6)</p>"
            f"<p><b>Profilo:</b> {name}, {title}</p>"
            f"<p><b>Periodo:</b> {period}</p>"
            "<br>"
            "<p>Applicazione desktop per conversazioni filosofiche con l'antica saggezza stoica.</p>"
            "<p><b>LLM:</b> Claude Anthropic (Haiku 4.5)</p>"
            "<p><b>RAG:</b> ChromaDB + ParentDocumentRetriever</p>"
            "<p><b>Framework:</b> PyQt6 + LangChain</p>"
            "<br>"
            "<p><i>Un ponte tra l'antica saggezza e il mondo contemporaneo.</i></p>"
        )

    def apply_stylesheet(self):
        """Applica lo stile all'applicazione"""
        # Stile semplice e pulito
        self.setStyleSheet("""
            QMainWindow {
                background-color: #f5f5f5;
            }
            QTextEdit {
                background-color: white;
                border: 1px solid #ddd;
                border-radius: 5px;
                padding: 10px;
                font-size: 13px;
                font-family: 'Segoe UI', 'Arial', sans-serif;
            }
            QLineEdit {
                background-color: white;
                border: 1px solid #ddd;
                border-radius: 5px;
                padding: 8px;
                font-size: 13px;
            }
            QLineEdit:focus {
                border: 2px solid #4CAF50;
            }
            QPushButton {
                background-color: #4CAF50;
                color: white;
                border: none;
                border-radius: 5px;
                padding: 8px 16px;
                font-size: 13px;
                font-weight: bold;
            }
            QPushButton:hover {
                background-color: #45a049;
            }
            QPushButton:pressed {
                background-color: #3d8b40;
            }
            QPushButton:disabled {
                background-color: #cccccc;
                color: #666666;
            }
            QLabel {
                color: #333;
            }
            QMenuBar {
                background-color: #fff;
                border-bottom: 1px solid #ddd;
            }
            QMenuBar::item:selected {
                background-color: #4CAF50;
                color: white;
            }
            QMenu {
                background-color: white;
                border: 1px solid #ddd;
            }
            QMenu::item:selected {
                background-color: #4CAF50;
                color: white;
            }
            QStatusBar {
                background-color: #fff;
                border-top: 1px solid #ddd;
                color: #666;
            }
        """)

    def closeEvent(self, event):
        """Gestisce la chiusura dell'applicazione"""
        reply = QMessageBox.question(
            self,
            "Conferma uscita",
            "Vuoi davvero chiudere Jarvis?",
            QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
            QMessageBox.StandardButton.No
        )

        if reply == QMessageBox.StandardButton.Yes:
            self.statusBar.showMessage("Arresto Kernel...")
            event.accept()
        else:
            event.ignore()