#!/usr/bin/env python3
"""
Category Selection Modal for YouTube TUI
"""

from typing import Optional

from textual.app import ComposeResult
from textual.containers import Container, Vertical
from textual.screen import ModalScreen
from textual.widgets import (
    Button,
    Footer,
    Header,
    Input,
    ListItem,
    ListView,
    Static,
)

from youtube_tui.services.youtube import YouTubeService


class CategorySelectionModal(ModalScreen):
    """Modal for selecting a download category"""

    CSS = """
    CategorySelectionModal {
        align: center middle;
    }
    
    #modal-container {
        width: 60%;
        height: auto;
        border: solid #555555;
        background: $surface;
        padding: 1;
    }
    
    #modal-title {
        width: 100%;
        height: 3;
        dock: top;
        background: $primary;
        content-align: center middle;
        color: $text;
    }
    
    #categories-container {
        width: 100%;
        height: 20;
        margin: 1 0;
    }
    
    #custom-input {
        width: 100%;
        margin: 1 0;
    }
    
    #modal-actions {
        width: 100%;
        height: auto;
        dock: bottom;
        margin-top: 1;
    }
    
    Button {
        width: 15;
        margin: 1 1;
    }
    
    ListItem {
        height: 3;
        padding: 0 1;
    }
    
    ListItem:hover {
        background: $primary-darken-2;
    }
    
    ListItem.--highlight {
        background: $primary;
    }
    """

    BINDINGS = [
        ("escape", "close_modal", "Cancel"),
        ("enter", "select_category", "Select"),
        ("up", "cursor_up", "Cursor Up"),
        ("down", "cursor_down", "Cursor Down"),
    ]

    def __init__(self) -> None:
        super().__init__()
        self.youtube_service = YouTubeService()
        self.selected_category: Optional[str] = None
        self.selected_index = 0

    def compose(self) -> ComposeResult:
        """Compose the modal"""
        yield Header()
        yield Container(
            Static("Select Download Category", id="modal-title"),
            Vertical(
                Static("Available Categories:", id="categories-label"),
                ListView(id="categories-list"),
                Static("Or type custom folder name:", id="custom-label"),
                Input(placeholder="Enter custom folder name...", id="custom-input"),
                id="categories-container",
            ),
            Container(
                Button("Select", id="select-btn"),
                Button("Cancel", id="cancel-btn"),
                id="modal-actions",
            ),
            id="modal-container",
        )
        yield Footer()

    def on_mount(self) -> None:
        """Called when modal is mounted"""
        self.load_categories()
        self.update_status("Use arrow keys to select, Enter to confirm")

    def load_categories(self) -> None:
        """Load available categories into the list"""
        list_view = self.query_one("#categories-list", ListView)
        list_view.clear()

        try:
            # Note: This is called from on_mount which is sync
            # In a real async context, this should be awaited
            categories: list = self.youtube_service.cli.get_categories(
                self.youtube_service.cli.config
            )

            for category in categories:
                # Extract folder name for display
                from pathlib import Path

                folder_name = Path(category).name if Path(category).name else "Root"

                # Create a custom widget for the item
                item = ListItem(Static(f"  {folder_name}"), id=f"category-{category}")
                list_view.append(item)

            # Highlight first item
            if list_view.children:
                list_view.children[0].add_class("--highlight")
                self.selected_index = 0

        except Exception as e:
            list_view.append(
                ListItem(Static(f"[red]Error loading categories: {e}[/red]"))
            )

    def update_status(self, message: str) -> None:
        """Update the modal status"""
        # We could add a status line if needed
        pass

    def action_select_category(self) -> None:
        """Select the current category"""
        list_view = self.query_one("#categories-list", ListView)

        if list_view.children and 0 <= self.selected_index < len(list_view.children):
            # Get the selected category
            item = list_view.children[self.selected_index]
            category_id = item.id
            if category_id and category_id.startswith("category-"):
                self.selected_category = category_id.replace("category-", "")
                self.dismiss(self.selected_category)
                return

        # Check custom input
        custom_input = self.query_one("#custom-input", Input)
        custom_name = custom_input.value.strip()
        if custom_name:
            self.selected_category = custom_name
            self.dismiss(self.selected_category)
            return

        # No valid selection
        self.update_status("[red]Please select a category or enter a custom name[/red]")

    def action_cursor_up(self) -> None:
        """Move cursor up"""
        list_view = self.query_one("#categories-list", ListView)
        if list_view.children:
            # Remove highlight from current item
            if 0 <= self.selected_index < len(list_view.children):
                list_view.children[self.selected_index].remove_class("--highlight")

            # Move up
            self.selected_index = max(0, self.selected_index - 1)

            # Highlight new item
            list_view.children[self.selected_index].add_class("--highlight")

    def action_cursor_down(self) -> None:
        """Move cursor down"""
        list_view = self.query_one("#categories-list", ListView)
        if list_view.children:
            # Remove highlight from current item
            if 0 <= self.selected_index < len(list_view.children):
                list_view.children[self.selected_index].remove_class("--highlight")

            # Move down
            self.selected_index = min(
                len(list_view.children) - 1, self.selected_index + 1
            )

            # Highlight new item
            list_view.children[self.selected_index].add_class("--highlight")

    def action_close_modal(self) -> None:
        """Close modal without selecting"""
        self.selected_category = None
        self.dismiss(None)

    def on_button_pressed(self, event: Button.Pressed) -> None:
        """Handle button presses"""
        if event.button.id == "select-btn":
            self.action_select_category()
        elif event.button.id == "cancel-btn":
            self.action_close_modal()

    def on_input_submitted(self, event: Input.Submitted) -> None:
        """Handle enter key in custom input"""
        self.action_select_category()