"""SkyWalker-1 TUI — main application.

Provides mode switching between 5 RF operating modes via a sidebar and F-key
shortcuts. Each mode is a Screen subclass that manages its own workers.

Note: We use "rf_mode" terminology for our 5 operating modes to avoid colliding
with Textual's built-in App.mode / _current_mode / _screen_stacks system.
"""

import argparse
import sys
import os
from pathlib import Path

# Add tools directory to path for skywalker_lib import
_tools_dir = str(Path(__file__).resolve().parent.parent.parent.parent / "tools")
if _tools_dir not in sys.path:
    sys.path.insert(0, _tools_dir)

from textual.app import App, ComposeResult
from textual.binding import Binding
from textual.containers import Horizontal, Vertical
from textual.widgets import Header, Footer, Button, Label, Static, ContentSwitcher

from skywalker_tui.bridge import USBBridge
from skywalker_tui.demo import DemoDevice
from skywalker_tui.widgets.status_bar import DeviceStatusBar

from skywalker_tui.screens.spectrum import SpectrumScreen
from skywalker_tui.screens.scan import ScanScreen
from skywalker_tui.screens.monitor import MonitorScreen
from skywalker_tui.screens.lband import LBandScreen
from skywalker_tui.screens.track import TrackScreen


MODES = {
    "spectrum": ("F1 Spectrum", SpectrumScreen),
    "scan": ("F2 Scan", ScanScreen),
    "monitor": ("F3 Monitor", MonitorScreen),
    "lband": ("F4 L-Band", LBandScreen),
    "track": ("F5 Track", TrackScreen),
}


class SkyWalkerApp(App):
    """Textual TUI for Genpix SkyWalker-1 DVB-S receiver."""

    TITLE = "SkyWalker-1"
    SUB_TITLE = "DVB-S RF Tool"
    CSS_PATH = "theme.tcss"

    BINDINGS = [
        Binding("f1", "rf_mode('spectrum')", "Spectrum", show=True),
        Binding("f2", "rf_mode('scan')", "Scan", show=True),
        Binding("f3", "rf_mode('monitor')", "Monitor", show=True),
        Binding("f4", "rf_mode('lband')", "L-Band", show=True),
        Binding("f5", "rf_mode('track')", "Track", show=True),
        Binding("q", "quit", "Quit", show=True),
        Binding("d", "toggle_dark", "Theme", show=True),
    ]

    def __init__(self, bridge: USBBridge, initial_mode: str = "spectrum"):
        super().__init__()
        self._bridge = bridge
        self._initial_rf_mode = initial_mode
        self._active_rf_mode = initial_mode
        self._rf_screens: dict[str, object] = {}

    def compose(self) -> ComposeResult:
        yield Header()
        with Horizontal():
            with Vertical(id="sidebar"):
                yield Label("[bold #00d4aa]SkyWalker-1[/]", classes="sidebar-heading")
                yield Label("[#506878]DVB-S RF Tool[/]", classes="sidebar-heading")
                yield Static("")
                for mode_key, (label, _cls) in MODES.items():
                    yield Button(label, id=f"btn-{mode_key}", classes="mode-button")
                yield Static("")
                yield DeviceStatusBar(self._bridge)
            yield ContentSwitcher(id="content-area")
        yield Footer()

    def on_mount(self) -> None:
        # Initialize status bar
        status = self.query_one(DeviceStatusBar)
        status.update_status(self._bridge)

        # Install all mode screens into the content switcher
        switcher = self.query_one("#content-area", ContentSwitcher)
        for mode_key, (_label, cls) in MODES.items():
            screen = cls(self._bridge, id=f"screen-{mode_key}")
            self._rf_screens[mode_key] = screen
            switcher.mount(screen)

        # Activate initial mode
        self.action_rf_mode(self._initial_rf_mode)

    def action_rf_mode(self, mode: str) -> None:
        """Switch to a different RF operating mode."""
        if mode not in MODES:
            return

        self._active_rf_mode = mode
        switcher = self.query_one("#content-area", ContentSwitcher)
        switcher.current = f"screen-{mode}"

        # Update sidebar button highlights
        for mode_key in MODES:
            btn = self.query_one(f"#btn-{mode_key}", Button)
            btn.remove_class("-active")
        self.query_one(f"#btn-{mode}", Button).add_class("-active")

        self.sub_title = f"DVB-S RF Tool — {MODES[mode][0]}"

    def on_button_pressed(self, event: Button.Pressed) -> None:
        """Handle sidebar mode button clicks."""
        btn_id = event.button.id or ""
        if btn_id.startswith("btn-"):
            mode = btn_id[4:]
            if mode in MODES:
                self.action_rf_mode(mode)

    def action_toggle_dark(self) -> None:
        self.dark = not self.dark


def main():
    parser = argparse.ArgumentParser(
        prog="skywalker-tui",
        description="Textual TUI for Genpix SkyWalker-1 DVB-S receiver",
    )
    parser.add_argument(
        "--demo", action="store_true",
        help="Use synthetic signal data (no hardware required)",
    )
    parser.add_argument(
        "mode", nargs="?", default="spectrum",
        choices=list(MODES.keys()),
        help="Initial mode (default: spectrum)",
    )
    parser.add_argument(
        "-v", "--verbose", action="store_true",
        help="Verbose USB logging (hardware mode only)",
    )
    args = parser.parse_args()

    if args.demo:
        device = DemoDevice()
        bridge = USBBridge(device)
    else:
        try:
            from skywalker_lib import SkyWalker1
            device = SkyWalker1(verbose=args.verbose)
            device.open()
            bridge = USBBridge(device)
        except Exception as e:
            print(f"Cannot open SkyWalker-1: {e}", file=sys.stderr)
            print("Use --demo for synthetic signal data.", file=sys.stderr)
            sys.exit(1)

    app = SkyWalkerApp(bridge=bridge, initial_mode=args.mode)
    try:
        app.run()
    finally:
        bridge.close()