"""
Command Palette Widget for YouTube TUI
"""

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


class CommandPalette(ModalScreen):
    """Command palette for quick access to actions"""

    DEFAULT_COMMANDS = [
        ("Search", "Search for videos"),
        ("Download", "Quick download mode"),
        ("History", "Show search history"),
        ("Settings", "Open settings"),
        ("Help", "Show help screen"),
        ("Quit", "Quit application"),
    ]

    CSS = """
    CommandPalette {
        align: center middle;
    }
    
    #palette-container {
        width: 60%;
        height: auto;
        border: solid #555555;
        background: $surface;
        padding: 1;
    }
    
    #palette-title {
        width: 100%;
        height: 3;
        dock: top;
        background: $primary;
        content-align: center middle;
        color: $text;
    }
    
    #palette-input {
        width: 100%;
        margin: 1 0;
    }
    
    #palette-list {
        width: 100%;
        height: 20;
        margin: 1 0;
    }
    
    #palette-actions {
        width: 100%;
        height: auto;
        dock: bottom;
        margin-top: 1;
    }
    
    ListItem {
        height: 3;
        padding: 0 1;
    }
    
    ListItem:hover {
        background: $primary-darken-2;
    }
    
    ListItem.--highlight {
        background: $primary;
    }
    
    .command-description {
        color: $text-muted;
    }
    """

    BINDINGS = [
        ("escape", "close_palette", "Close"),
        ("up", "cursor_up", "Cursor Up"),
        ("down", "cursor_down", "Cursor Down"),
        ("enter", "select_command", "Select"),
    ]

    def __init__(self):
        super().__init__()
        self.selected_index = 0
        self.commands = self.DEFAULT_COMMANDS.copy()

    def compose(self) -> ComposeResult:
        """Compose the command palette"""
        yield Header()
        yield Container(
            Static("Command Palette", id="palette-title"),
            Input(placeholder="Type to filter commands...", id="palette-input"),
            ListView(id="palette-list-view"),
            id="palette-container",
        )
        yield Footer()

    def on_mount(self) -> None:
        """Called when palette is mounted"""
        self.update_list()
        self.query_one(Input).focus()

    def update_list(self) -> None:
        """Update the command list"""
        input_widget = self.query_one("#palette-input", Input)
        filter_text = input_widget.value.lower()

        # Filter commands
        if filter_text:
            self.commands = [
                (cmd, desc)
                for cmd, desc in self.DEFAULT_COMMANDS
                if filter_text in cmd.lower() or filter_text in desc.lower()
            ]
        else:
            self.commands = self.DEFAULT_COMMANDS.copy()

        # Update the list view
        list_view = self.query_one("#palette-list-view", ListView)
        list_view.clear()

        for i, (command, description) in enumerate(self.commands):
            item = ListItem(
                Static(f"[bold]{command}[/bold]\n{description}"),
            )
            list_view.append(item)

        # Update selected index if needed
        if self.selected_index >= len(self.commands):
            self.selected_index = max(0, len(self.commands) - 1)

        # Highlight selected item
        self.highlight_selected()

    def highlight_selected(self) -> None:
        """Highlight the selected item"""
        list_view = self.query_one("#palette-list-view", ListView)

        for i, item in enumerate(list_view.children):
            if i == self.selected_index:
                item.add_class("--highlight")
            else:
                item.remove_class("--highlight")

    def action_cursor_up(self) -> None:
        """Move selection up"""
        if self.commands:
            self.selected_index = max(0, self.selected_index - 1)
            self.highlight_selected()

    def action_cursor_down(self) -> None:
        """Move selection down"""
        if self.commands:
            self.selected_index = min(len(self.commands) - 1, self.selected_index + 1)
            self.highlight_selected()

    def action_select_command(self) -> None:
        """Execute the selected command"""
        if not self.commands:
            return

        command = self.commands[self.selected_index][0]
        self.execute_command(command)

    def execute_command(self, command: str) -> None:
        """Execute a command"""
        if command == "Search":
            self.app.push_screen("search")
            self.app.pop_screen()
        elif command == "Download":
            # Go to search for quick download
            self.app.push_screen("search")
            self.app.pop_screen()
        elif command == "History":
            self.app.push_screen("history")
        elif command == "Settings":
            self.app.push_screen("settings")
        elif command == "Help":
            self.app.push_screen("help")
        elif command == "Quit":
            self.app.exit()

    def action_close_palette(self) -> None:
        """Close the palette"""
        self.app.pop_screen()

    def on_input_changed(self, event: Input.Changed) -> None:
        """Handle input changes"""
        self.update_list()

    def on_data_table_row_selected(self, event) -> None:
        """Handle row selection"""
        self.action_select_command()