# -*- coding: utf-8 -*-
"""
Plugins-View: Tabellarische Liste aller Plugins.

Zeigt Plugins in einer DataTable mit Name, Version, Beschreibung, Status.
Enter/Klick auf eine Zeile oeffnet die Plugin-Detailansicht.
Buttons zum Aktivieren/Deaktivieren und Neuladen.
"""

from __future__ import annotations

from textual.app import ComposeResult
from textual.containers import Horizontal
from textual.widgets import Static, Button, DataTable

from trixy_core.tui.views.base import MainView


class PluginsView(MainView):
    """
    F4: Plugin-Ansicht.

    Zeigt alle geladenen Plugins tabellarisch.
    Zeilen-Auswahl oeffnet Details, Buttons fuer Enable/Disable/Reload.
    """

    TITLE = "Plugins"
    VIEW_ID = "plugins"

    def __init__(self, **kwargs) -> None:
        super().__init__(**kwargs)
        self._plugins: list[dict] = []
        self._refresh_counter: int = 0

    def compose(self) -> ComposeResult:
        yield Static("", id="plugin-header")
        yield DataTable(id="plugin-table", cursor_type="row")

        with Horizontal(id="plugin-actions"):
            yield Button("Aktivieren", id="plugin-btn-enable", variant="success")
            yield Button("Deaktivieren", id="plugin-btn-disable", variant="warning")
            yield Button("Neu laden", id="plugin-btn-reload", variant="default")

        yield Static("", id="plugin-status")

    async def on_activate(self) -> None:
        """Laedt die Plugin-Liste."""
        table = self.query_one("#plugin-table", DataTable)
        if not table.columns:
            table.add_columns("Name", "Version", "Beschreibung", "Status")
        await self._load_plugins()

    async def refresh_data(self) -> None:
        """Periodisches Update (alle 10 Sekunden)."""
        self._refresh_counter += 1
        if self._refresh_counter % 5 == 0:
            await self._load_plugins()

    async def _load_plugins(self) -> None:
        """Laedt die Plugin-Liste vom Server."""
        if not self.connection:
            return

        try:
            response = await self.connection.request_plugins()
        except Exception:
            self._set_status("Fehler beim Laden der Plugins", error=True)
            return

        if response is None:
            return

        self._plugins = response.plugins
        self._update_header()
        self._update_table()

    def _update_header(self) -> None:
        """Aktualisiert die Kopfzeile."""
        header = self.query_one("#plugin-header", Static)
        total = len(self._plugins)
        enabled = sum(1 for p in self._plugins if p.get("enabled", False))
        failed = sum(1 for p in self._plugins if p.get("failed", False))

        info = f"[bold]Plugins:[/bold] {enabled}/{total} aktiv"
        if failed:
            info += f"  [red]{failed} fehlgeschlagen[/red]"

        header.update(info)

    def _update_table(self) -> None:
        """Aktualisiert die Plugin-Tabelle."""
        table = self.query_one("#plugin-table", DataTable)
        table.clear()

        sorted_plugins = sorted(
            self._plugins,
            key=lambda p: (
                p.get("failed", False),
                not p.get("enabled", False),
                p.get("name", ""),
            ),
        )

        for plugin_data in sorted_plugins:
            name = plugin_data.get("name", "Unbekannt")
            version = plugin_data.get("version", "")
            description = plugin_data.get("description", "")
            enabled = plugin_data.get("enabled", False)
            failed = plugin_data.get("failed", False)

            if failed:
                status = "[red]Fehler[/red]"
            elif enabled:
                status = "[green]Aktiv[/green]"
            else:
                status = "[dim]Inaktiv[/dim]"

            table.add_row(name, version, description, status, key=name)

    def _get_selected_plugin(self) -> dict | None:
        """Gibt das aktuell markierte Plugin zurueck."""
        try:
            table = self.query_one("#plugin-table", DataTable)
            row_key, _ = table.coordinate_to_cell_key(table.cursor_coordinate)
            name = str(row_key.value) if row_key else ""
            if name:
                for p in self._plugins:
                    if p.get("name") == name:
                        return p
        except Exception:
            pass
        return None

    async def on_data_table_row_selected(self, event: DataTable.RowSelected) -> None:
        """Enter auf einer Zeile: Oeffnet die Detail-Ansicht."""
        row_key = str(event.row_key.value) if event.row_key else ""
        plugin_data = None
        for p in self._plugins:
            if p.get("name") == row_key:
                plugin_data = p
                break

        if not plugin_data:
            return

        if plugin_data.get("failed", False):
            self._set_status(
                f"Fehler: {plugin_data.get('error', 'Unbekannt')}", error=True
            )
            return

        try:
            app = self.app
            if hasattr(app, "open_plugin_detail"):
                await app.open_plugin_detail(plugin_data)
        except Exception:
            pass

    async def on_button_pressed(self, event: Button.Pressed) -> None:
        """Verarbeitet Button-Klicks."""
        btn_id = event.button.id
        if not self.connection:
            return

        plugin = self._get_selected_plugin()
        if not plugin:
            self._set_status("Kein Plugin ausgewaehlt", error=True)
            return

        name = plugin.get("name", "")

        if btn_id == "plugin-btn-enable":
            if plugin.get("failed", False):
                self._set_status("Fehlgeschlagene Plugins muessen neu geladen werden", error=True)
                return
            await self._plugin_action("enable", name)

        elif btn_id == "plugin-btn-disable":
            if plugin.get("failed", False):
                return
            await self._plugin_action("disable", name)

        elif btn_id == "plugin-btn-reload":
            await self._plugin_action("reload", name)

    async def _plugin_action(self, action: str, name: str) -> None:
        """Fuehrt eine Plugin-Aktion aus und aktualisiert die Liste."""
        result = await self.connection.plugin_action(action=action, plugin_name=name)
        if result and result.success:
            self._set_status(result.message)
            await self._load_plugins()
        else:
            error = result.error if result else "Unbekannter Fehler"
            self._set_status(f"Fehler: {error}", error=True)

    def _set_status(self, text: str, error: bool = False) -> None:
        """Setzt die Statuszeile."""
        status = self.query_one("#plugin-status", Static)
        if error:
            status.update(f"[red]{text}[/red]")
        else:
            status.update(f"[green]{text}[/green]")