#!/usr/bin/env python3
"""Shared GUI Base Module for GTK3 Apps.

Provides BaseApp class with:
- Window setup (title, size, icon, HeaderBar, StatusBar)
- Catppuccin theme via ClaudeCodePanel/theme.py
- COSMIC dark/light auto-detection + watcher
- Refresh timer management
- Extendable CSS

Usage:
    from gui_base import BaseApp

    class MyApp(BaseApp):
        def __init__(self):
            super().__init__("My App", 800, 600)
            # Add widgets to self.content_box
            label = Gtk.Label(label="Hello")
            self.content_box.pack_start(label, True, True, 0)
"""

import sys
from pathlib import Path

import gi

gi.require_version("Gdk", "3.0")
gi.require_version("Gtk", "3.0")
from gi.repository import Gdk, GLib, Gtk

# Import theme module from ClaudeCodePanel
sys.path.insert(0, str(Path.home() / "Projekte" / "ClaudeCodePanel"))
from theme import build_css, get_palette, setup_theme_watcher


# ---------------------------------------------------------------------------
# Additional CSS for shared components
# ---------------------------------------------------------------------------

def _base_css(p: dict[str, str]) -> str:
    """Generate additional shared CSS classes."""
    return f"""
.base-card {{
    border-radius: 8px;
    background: {p["card"]};
    border: 1px solid {p["border"]};
    padding: 10px;
    margin: 4px 0;
}}

.base-card:hover {{
    background: {p["border"]};
}}

.base-toolbar {{
    background: {p["mantle"]};
    border-radius: 8px;
    padding: 6px 10px;
}}

.base-badge {{
    border-radius: 12px;
    padding: 2px 8px;
    font-size: 10px;
    font-weight: bold;
}}

.base-badge-ok {{
    background: {p["green_hover_bg"]};
    color: {p["green"]};
}}

.base-badge-warn {{
    background: {p["yellow_hover_bg"]};
    color: {p["yellow"]};
}}

.base-badge-error {{
    background: rgba(243,139,168,0.2);
    color: {p["red"]};
}}

.base-accent-btn {{
    padding: 6px 16px;
    border-radius: 6px;
    background: {p["accent"]};
    color: {p["resume_text"]};
    font-weight: bold;
    border: none;
}}

.base-accent-btn:hover {{
    background: {p["lavender"]};
}}
"""


class BaseApp(Gtk.Window):
    """Base class for standalone GTK3 apps with Catppuccin theming."""

    def __init__(
        self,
        title: str,
        width: int = 800,
        height: int = 600,
        icon_name: str | None = None,
    ):
        super().__init__(title=title)
        self.set_default_size(width, height)
        if icon_name:
            self.set_icon_name(icon_name)
        self.connect("destroy", Gtk.main_quit)

        self._refresh_sources: list[int] = []

        # --- Theme setup ---
        self._css_provider = Gtk.CssProvider()
        self._apply_full_css()
        Gtk.StyleContext.add_provider_for_screen(
            Gdk.Screen.get_default(),
            self._css_provider,
            Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION,
        )
        setup_theme_watcher(self._css_provider)

        # --- Layout: Header + Content + StatusBar ---
        root_box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
        self.add(root_box)

        # HeaderBar
        self._header = Gtk.HeaderBar()
        self._header.set_show_close_button(True)
        self._header.set_title(title)
        self.set_titlebar(self._header)

        # Content area (subclasses add widgets here)
        self.content_box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=6)
        self.content_box.set_margin_start(12)
        self.content_box.set_margin_end(12)
        self.content_box.set_margin_top(12)
        self.content_box.set_margin_bottom(6)
        root_box.pack_start(self.content_box, True, True, 0)

        # StatusBar
        self._status_box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
        self._status_box.get_style_context().add_class("status-bar")
        self._status_label = Gtk.Label(label="Ready")
        self._status_label.set_xalign(0)
        self._status_box.pack_start(self._status_label, True, True, 0)
        root_box.pack_end(self._status_box, False, False, 0)

    # --- Public API ---

    def set_subtitle(self, subtitle: str) -> None:
        """Set the HeaderBar subtitle."""
        self._header.set_subtitle(subtitle)

    def add_header_widget(self, widget: Gtk.Widget, end: bool = True) -> None:
        """Add a widget to the HeaderBar (end=True for right side)."""
        if end:
            self._header.pack_end(widget)
        else:
            self._header.pack_start(widget)

    def set_status(self, text: str, css_class: str = "") -> None:
        """Update the status bar text and optional CSS class."""
        self._status_label.set_text(text)
        ctx = self._status_label.get_style_context()
        for cls in ("status-saved", "status-error"):
            ctx.remove_class(cls)
        if css_class:
            ctx.add_class(css_class)

    def start_refresh(self, interval_seconds: int, callback) -> int:
        """Start a periodic refresh timer. Returns the source ID."""
        source_id = GLib.timeout_add_seconds(interval_seconds, callback)
        self._refresh_sources.append(source_id)
        return source_id

    def stop_all_refresh(self) -> None:
        """Stop all refresh timers."""
        for source_id in self._refresh_sources:
            GLib.source_remove(source_id)
        self._refresh_sources.clear()

    def add_css(self, css_string: str) -> None:
        """Add extra CSS rules. Call after __init__."""
        palette = get_palette()
        full_css = build_css(palette).decode() + _base_css(palette) + css_string
        self._css_provider.load_from_data(full_css.encode())

    def run(self) -> None:
        """Show all widgets and start the GTK main loop."""
        self.show_all()
        Gtk.main()

    # --- Internal ---

    def _apply_full_css(self) -> None:
        """Load theme CSS + base CSS into the provider."""
        palette = get_palette()
        full_css = build_css(palette).decode() + _base_css(palette)
        self._css_provider.load_from_data(full_css.encode())