#!/usr/bin/env python3
"""
GNSS Sky Plot Viewer
Unterstützt UBX über serielle Schnittstelle UND TCP/IP (Ser2net).
TCP/IP-Verbindungen werden in einer persistenten LRU-Liste (max. 5) gespeichert.
"""

import sys
from PyQt5.QtWidgets import (
    QApplication, QMainWindow, QWidget, QVBoxLayout,
    QHBoxLayout, QLabel, QStatusBar, QSplitter, )
from PyQt5.QtCore import Qt

from connection_panel import ConnectionPanel
from gnss_thread import GnssReader
from sat_table import SatelliteTable
from sky_plot_widget import SkyPlotWidget


# ---------------------------------------------------------------------------
# Hauptfenster
# ---------------------------------------------------------------------------
class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("GNSS Sky Plot – UBX | Seriell + TCP/IP")
        self.resize(980, 680)
        self.setStyleSheet("background-color: #12192b; color: #cccccc;")
        self._reader = None
        self._build_ui()

    def _build_ui(self):
        central = QWidget()
        self.setCentralWidget(central)
        root = QVBoxLayout(central)
        root.setContentsMargins(8, 8, 8, 8)

        # Obere Leiste
        top = QHBoxLayout()

        self._conn_panel = ConnectionPanel()
        self._conn_panel.connect_requested.connect(self._connect)
        self._conn_panel.disconnect_requested.connect(self._disconnect)
        top.addWidget(self._conn_panel)

        self._sat_label = QLabel("Satelliten: –")
        self._sat_label.setAlignment(Qt.AlignRight | Qt.AlignVCenter)
        self._sat_label.setStyleSheet("font-size: 13px; color: #7ab7d4;")
        top.addStretch()
        top.addWidget(self._sat_label)

        root.addLayout(top)

        # Splitter: Sky Plot | Tabelle
        splitter = QSplitter(Qt.Horizontal)
        self._sky_plot = SkyPlotWidget()
        self._table    = SatelliteTable()
        splitter.addWidget(self._sky_plot)
        splitter.addWidget(self._table)
        splitter.setSizes([540, 380])
        root.addWidget(splitter)

        self._status = QStatusBar()
        self.setStatusBar(self._status)
        self._status.showMessage("Nicht verbunden.")

    def _connect(self, factory, label: str):
        self._reader = GnssReader(factory)
        self._reader.satellites_updated.connect(self._on_satellites)
        self._reader.error_occurred.connect(self._on_error)
        self._reader.connected.connect(
            lambda msg: self._status.showMessage(f"{msg}: {label}")
        )
        self._reader.start()
        self._conn_panel.set_connected(True)
        self._status.showMessage(f"Verbinde mit {label} …")

    def _disconnect(self):
        if self._reader:
            self._reader.stop()
            self._reader = None
        self._conn_panel.set_connected(False)
        self._status.showMessage("Verbindung getrennt.")

    def _on_satellites(self, sats: list):
        visible = [s for s in sats if s["elev"] >= 0]
        used    = sum(1 for s in sats if s["used"])
        self._sat_label.setText(f"Satelliten: {len(visible)} sichtbar, {used} genutzt")
        self._sky_plot.update_satellites(visible)
        self._table.update_satellites(visible)

    def _on_error(self, msg: str):
        self._status.showMessage(f"Fehler: {msg}")
        self._disconnect()

    def closeEvent(self, event):
        self._disconnect()
        super().closeEvent(event)


# ---------------------------------------------------------------------------
if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setStyle("Fusion")
    win = MainWindow()
    win.show()
    sys.exit(app.exec_())