"""
Help Screen for YouTube TUI
"""

from textual.app import ComposeResult
from textual.containers import Container, VerticalScroll
from textual.screen import ModalScreen
from textual.widgets import Footer, Header, Static


class HelpScreen(ModalScreen):
    """Help screen with keyboard shortcuts documentation"""

    CSS = """
    HelpScreen {
        align: center middle;
    }
    
    #help-container {
        width: 80%;
        height: 80%;
        border: solid #555555;
        background: $surface;
        padding: 1;
    }
    
    #help-title {
        width: 100%;
        height: 3;
        dock: top;
        background: $primary;
        content-align: center middle;
        color: $text;
    }
    
    .section-title {
        width: 100%;
        height: 2;
        margin: 1 0;
        color: $primary;
        text-style: bold;
    }
    
    .shortcut-row {
        height: 2;
        padding: 0 1;
    }
    
    .shortcut-key {
        width: 20;
        color: $accent;
        text-style: bold;
    }
    
    .shortcut-desc {
        width: 100%;
        color: $text;
    }
    
    #app-description {
        width: 100%;
        height: 6;
        margin: 1 0;
        color: $text;
    }
    
    #config-info {
        width: 100%;
        height: auto;
        margin: 1 0;
        color: $text-muted;
    }
    
    #close-hint {
        width: 100%;
        height: 2;
        dock: bottom;
        text-align: center;
        color: $text-muted;
    }
    """

    BINDINGS = [
        ("escape", "close_help", "Close"),
        ("q", "close_help", "Close"),
    ]

    def compose(self) -> ComposeResult:
        """Compose the help screen"""
        yield Header()
        yield Container(
            Static("YouTube TUI Help", id="help-title"),
            VerticalScroll(
                Static(
                    "A Text-based User Interface for browsing and downloading YouTube videos",
                    id="app-description",
                ),
                Static("Global Keyboard Shortcuts", classes="section-title"),
                Static(
                    "[key]q[/key]  [desc]Quit application[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]escape[/key]  [desc]Cancel current operation / go back[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]ctrl+p[/key]  [desc]Open command palette[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]ctrl+h[/key]  [desc]Show this help screen[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]ctrl+t[/key]  [desc]Toggle theme (dark/light)[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]ctrl+r[/key]  [desc]Refresh current screen[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]ctrl+f[/key]  [desc]Open search from any screen[/desc]",
                    classes="shortcut-row",
                ),
                Static("Search Screen Shortcuts", classes="section-title"),
                Static(
                    "[key]enter[/key]  [desc]Perform search[/desc]",
                    classes="shortcut-row",
                ),
                Static("Results Screen Shortcuts", classes="section-title"),
                Static(
                    "[key]n[/key]  [desc]Next page[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]p[/key]  [desc]Previous page[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]enter[/key]  [desc]Download selected video[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]escape[/key]  [desc]Go back to search[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "Category Selection Modal Shortcuts",
                    classes="section-title",
                ),
                Static(
                    "[key]arrow keys[/key]  [desc]Navigate options[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]enter[/key]  [desc]Select category[/desc]",
                    classes="shortcut-row",
                ),
                Static(
                    "[key]escape[/key]  [desc]Cancel[/desc]",
                    classes="shortcut-row",
                ),
                Static("Configuration", classes="section-title"),
                Static(
                    "Configuration file: [path]~/.config/youtube_cli/config.json[/path]",
                    classes="config-info",
                ),
                Static(
                    "Archive file: [path]~/.config/youtube_cli/downloaded_videos.json[/path]",
                    classes="config-info",
                ),
                id="help-content",
            ),
            Static("Press [key]ESC[/key] or [key]Q[/key] to close", id="close-hint"),
            id="help-container",
        )
        yield Footer()

    def action_close_help(self) -> None:
        """Close the help screen"""
        self.app.pop_screen()