"""
Tab Navigation Component nach Styleguide
"""

from PyQt5.QtWidgets import QWidget, QHBoxLayout, QPushButton, QLabel
from PyQt5.QtCore import pyqtSignal, Qt
from PyQt5.QtGui import QFont


class TabNavigation(QWidget):
    """
    Tab-Navigation nach Styleguide mit zwei Modi:
    - Plattformen (Standard)
    - Accounts
    """
    
    # Signal wird ausgelöst wenn Tab gewechselt wird (0=Plattformen, 1=Accounts)
    tab_changed = pyqtSignal(int)
    
    def __init__(self, language_manager=None):
        super().__init__()
        self.language_manager = language_manager
        self.current_tab = 0
        self.init_ui()
        
        if self.language_manager:
            self.language_manager.language_changed.connect(self.update_texts)
            self.update_texts()
    
    def init_ui(self):
        """Initialisiert die UI nach Styleguide"""
        # Feste Höhe nach Styleguide
        self.setFixedHeight(48)
        
        # Basis-Styling
        self.setStyleSheet("""
            QWidget {
                background-color: #FFFFFF;
                border-bottom: 1px solid #E2E8F0;
            }
        """)
        
        # Layout
        layout = QHBoxLayout(self)
        layout.setContentsMargins(40, 0, 40, 0)
        layout.setSpacing(24)
        
        # Tab Buttons erstellen
        self.platform_tab = self._create_tab_button("Plattformen", True)
        self.platform_tab.clicked.connect(lambda: self._on_tab_clicked(0))
        layout.addWidget(self.platform_tab)
        
        # Accounts Tab (ohne Badge)
        self.accounts_tab = self._create_tab_button("Accounts", False)
        self.accounts_tab.clicked.connect(lambda: self._on_tab_clicked(1))
        layout.addWidget(self.accounts_tab)
        
        # Spacer
        layout.addStretch()
    
    def _create_tab_button(self, text, active=False):
        """Erstellt einen Tab-Button nach Styleguide"""
        btn = QPushButton(text)
        btn.setCheckable(True)
        btn.setChecked(active)
        btn.setCursor(Qt.PointingHandCursor)
        
        # Poppins Font
        font = QFont("Poppins", 15)
        font.setWeight(QFont.Medium)
        btn.setFont(font)
        
        btn.setStyleSheet("""
            QPushButton {
                background: transparent;
                border: none;
                border-bottom: 2px solid transparent;
                padding: 12px 24px;
                font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
                font-size: 15px;
                font-weight: 500;
                color: #4A5568;
                min-width: 100px;
            }
            QPushButton:checked {
                color: #1A365D;
                border-bottom-color: #3182CE;
            }
            QPushButton:hover:!checked {
                color: #2D3748;
                background-color: #F7FAFC;
            }
            QPushButton:pressed {
                color: #1A365D;
            }
        """)
        
        return btn
    
    def _on_tab_clicked(self, index):
        """Behandelt Tab-Klicks"""
        if self.current_tab != index:
            self.current_tab = index
            
            # Update button states
            self.platform_tab.setChecked(index == 0)
            self.accounts_tab.setChecked(index == 1)
            
            # Emit signal
            self.tab_changed.emit(index)
    
    def set_active_tab(self, index):
        """Setzt den aktiven Tab programmatisch"""
        self._on_tab_clicked(index)
    
    def update_account_count(self, count):
        """Deprecated: Account-Anzahl wird nicht mehr im Tab angezeigt"""
        pass
            
    def update_texts(self):
        """Aktualisiert die Texte gemäß der aktuellen Sprache"""
        if not self.language_manager:
            return
            
        self.platform_tab.setText(
            self.language_manager.get_text("platform_selector.platforms_tab", "Plattformen")
        )
        self.accounts_tab.setText(
            self.language_manager.get_text("platform_selector.accounts_tab", "Accounts")
        )