#!/usr/bin/env python
import signal
from collections.abc import Callable
from pathlib import Path
from typing import Annotated

import typer
from rich.console import Console, Group
from rich.live import Live
from rich.progress import (
    BarColumn,
    Progress,
    SpinnerColumn,
    TaskProgressColumn,
    TextColumn,
)
from rich.table import Table

from tidal_dl_ng import __version__
from tidal_dl_ng.config import HandlingApp, Settings, Tidal
from tidal_dl_ng.constants import CTX_TIDAL, MediaType
from tidal_dl_ng.download import Download
from tidal_dl_ng.helper.path import get_format_template, path_file_settings
from tidal_dl_ng.helper.tidal import (
    all_artist_album_ids,
    get_tidal_media_id,
    get_tidal_media_type,
    instantiate_media,
)
from tidal_dl_ng.helper.wrapper import LoggerWrapped
from tidal_dl_ng.model.cfg import HelpSettings

app = typer.Typer(context_settings={"help_option_names": ["-h", "--help"]}, add_completion=False)
dl_fav_group = typer.Typer(
    context_settings={"help_option_names": ["-h", "--help"]},
    add_completion=True,
    help="Download from a favorites collection.",
)

app.add_typer(dl_fav_group, name="dl_fav")


def version_callback(value: bool):
    """Callback to print version and exit if version flag is set.

    Args:
        value (bool): If True, prints version and exits.
    """
    if value:
        print(f"{__version__}")
        raise typer.Exit()


def _handle_track_or_video(
    dl: Download, settings: Settings, item: str, media: object, file_template: str, idx: int, urls_pos_last: int
) -> None:
    """Handle downloading a track or video item.

    Args:
        dl (Download): The Download instance.
        settings (Settings): The Settings instance.
        item (str): The URL or identifier of the item.
        media: The media object to download.
        file_template (str): The file template for saving the media.
        idx (int): The index of the item in the list.
        urls_pos_last (int): The last index in the URLs list.
    """
    download_delay: bool = bool(settings.data.download_delay and idx < urls_pos_last)

    dl.item(
        media=media,
        file_template=file_template,
        download_delay=download_delay,
        quality_audio=settings.data.quality_audio,
        quality_video=settings.data.quality_video,
    )


def _handle_album_playlist_mix_artist(
    dl: Download,
    ctx: typer.Context,
    handling_app: HandlingApp,
    settings: Settings,
    media_type: MediaType,
    media: object,
    item_id: int,
    file_template: str,
) -> bool:
    """Handle downloading albums, playlists, mixes, or artist collections.

    Args:
        dl (Download): The Download instance.
        ctx (typer.Context): Typer context object.
        handling_app (HandlingApp): The HandlingApp instance.
        settings (Settings): The Settings instance.
        media_type (MediaType): The type of media (album, playlist, mix, or artist).
        media: The media object to download.
        item_id (int): The ID of the media item.
        file_template (str): The file template for saving the media.

    Returns:
        bool: False if aborted, True otherwise.
    """
    item_ids: list[int] = []

    if media_type == MediaType.ARTIST:
        media_type = MediaType.ALBUM
        item_ids = item_ids + all_artist_album_ids(media)
    else:
        item_ids.append(item_id)

    for _item_id in item_ids:
        if handling_app.event_abort.is_set():
            return False

        dl.items(
            media_id=_item_id,
            media_type=media_type,
            file_template=file_template,
            video_download=ctx.obj[CTX_TIDAL].settings.data.video_download,
            download_delay=settings.data.download_delay,
        )

    return True


def _process_url(
    dl: Download,
    ctx: typer.Context,
    handling_app: HandlingApp,
    settings: Settings,
    item: str,
    idx: int,
    urls_pos_last: int,
) -> bool:
    """Process a single URL or ID for download.

    Args:
        dl (Download): The Download instance.
        ctx (typer.Context): Typer context object.
        handling_app (HandlingApp): The HandlingApp instance.
        settings (Settings): The Settings instance.
        item (str): The URL or identifier to process.
        idx (int): The index of the item in the list.
        urls_pos_last (int): The last index in the URLs list.

    Returns:
        bool: False if aborted, True otherwise.
    """
    if handling_app.event_abort.is_set():
        return False

    if "http" not in item:
        print(f"It seems like that you have supplied an invalid URL: {item}")
        return True

    media_type: MediaType = get_tidal_media_type(item)
    item_id: int = get_tidal_media_id(item)
    file_template: str = get_format_template(media_type, settings)

    try:
        media: object = instantiate_media(ctx.obj[CTX_TIDAL].session, media_type, item_id)
    except Exception:
        print(f"Media not found (ID: {item_id}). Maybe it is not available anymore.")
        return True

    if media_type in [MediaType.TRACK, MediaType.VIDEO]:
        _handle_track_or_video(dl, settings, item, media, file_template, idx, urls_pos_last)
    elif media_type in [MediaType.ALBUM, MediaType.PLAYLIST, MediaType.MIX, MediaType.ARTIST]:
        return _handle_album_playlist_mix_artist(
            dl, ctx, handling_app, settings, media_type, media, item_id, file_template
        )
    return True


def _download(ctx: typer.Context, urls: list[str], try_login: bool = True) -> bool:
    """Invokes download function and tracks progress.

    Args:
        ctx (typer.Context): The typer context object.
        urls (list[str]): The list of URLs to download.
        try_login (bool, optional): If true, attempts to login to TIDAL. Defaults to True.

    Returns:
        bool: True if ran successfully.
    """
    if try_login:
        ctx.invoke(login, ctx)

    settings: Settings = Settings()
    handling_app: HandlingApp = HandlingApp()

    progress: Progress = Progress(
        TextColumn("[progress.description]{task.description}"),
        SpinnerColumn(),
        BarColumn(),
        TaskProgressColumn(),
        refresh_per_second=20,
        auto_refresh=True,
        expand=True,
        transient=False,
    )

    progress_overall = Progress(
        TextColumn("[progress.description]{task.description}"),
        SpinnerColumn(),
        BarColumn(),
        TaskProgressColumn(),
        refresh_per_second=20,
        auto_refresh=True,
        expand=True,
        transient=False,
    )

    fn_logger = LoggerWrapped(progress.print)

    dl = Download(
        session=ctx.obj[CTX_TIDAL].session,
        skip_existing=ctx.obj[CTX_TIDAL].settings.data.skip_existing,
        path_base=settings.data.download_base_path,
        fn_logger=fn_logger,
        progress=progress,
        progress_overall=progress_overall,
        event_abort=handling_app.event_abort,
        event_run=handling_app.event_run,
    )

    progress_table = Table.grid()
    progress_table.add_row(progress)
    progress_table.add_row(progress_overall)
    progress_group = Group(progress_table)

    urls_pos_last = len(urls) - 1

    with Live(progress_group, refresh_per_second=20, vertical_overflow="visible"):
        try:
            for idx, item in enumerate(urls):
                if _process_url(dl, ctx, handling_app, settings, item, idx, urls_pos_last) is False:
                    return False
        finally:
            progress.refresh()
            progress.stop()

    return True


@app.callback()
def callback_app(
    ctx: typer.Context,
    version: Annotated[bool | None, typer.Option("--version", "-v", callback=version_callback, is_eager=True)] = None,
):
    """App callback to initialize context and handle version option.

    Args:
        ctx (typer.Context): Typer context object.
        version (bool | None, optional): Version flag. Defaults to None.
    """
    ctx.obj = {"tidal": None}


@app.command(name="cfg")
def settings_management(
    names: Annotated[list[str] | None, typer.Argument()] = None,
    editor: Annotated[
        bool, typer.Option("--editor", "-e", help="Open the settings file in your default editor.")
    ] = False,
):
    """Print or set an option, or open the settings file in an editor.

    Args:
        names (list[str] | None, optional): None (list all options), one (list the value only for this option) or two arguments (set the value for the option). Defaults to None.
        editor (bool, optional): If set, your favorite system editor will be opened. Defaults to False.
    """
    if editor:
        config_path: Path = Path(path_file_settings())

        if not config_path.is_file():
            config_path.write_text('{"version": "1.0.0"}')

        config_file_str = str(config_path)

        typer.launch(config_file_str)
    else:
        settings = Settings()
        d_settings = settings.data.to_dict()

        if names:
            if names[0] not in d_settings:
                print(f'Option "{names[0]}" is not valid!')
            else:
                if len(names) == 1:
                    print(f'{names[0]}: "{d_settings[names[0]]}"')
                elif len(names) > 1:
                    settings.set_option(names[0], names[1])
                    settings.save()
        else:
            help_settings: dict = HelpSettings().to_dict()
            table = Table(title=f"Config: {path_file_settings()}")
            table.add_column("Key", style="cyan", no_wrap=True)
            table.add_column("Value", style="magenta")
            table.add_column("Description", style="green")

            # Iterate over the attributes of the dataclass
            for key, value in sorted(d_settings.items()):
                table.add_row(key, str(value), help_settings[key])

            console = Console()
            console.print(table)


@app.command(name="login")
def login(ctx: typer.Context) -> bool:
    """Login to TIDAL and update context object.

    Args:
        ctx (typer.Context): Typer context object.

    Returns:
        bool: True if login was successful, False otherwise.
    """
    print("Let us check, if you are already logged in... ", end="")

    settings = Settings()
    tidal = Tidal(settings)
    result = tidal.login(fn_print=print)
    ctx.obj[CTX_TIDAL] = tidal

    return result


@app.command(name="logout")
def logout() -> bool:
    """Logout from TIDAL.

    Returns:
        bool: True if logout was successful, False otherwise.
    """
    settings = Settings()
    tidal = Tidal(settings)
    result = tidal.logout()

    if result:
        print("You have been successfully logged out.")

    return result


@app.command(name="dl")
def download(
    ctx: typer.Context,
    urls: Annotated[list[str] | None, typer.Argument()] = None,
    file_urls: Annotated[
        Path | None,
        typer.Option(
            "--list",
            "-l",
            exists=True,
            file_okay=True,
            dir_okay=False,
            writable=False,
            readable=True,
            resolve_path=True,
            help="List with URLs to download. One per line",
        ),
    ] = None,
) -> bool:
    """Download media from provided URLs or a file containing URLs.

    Args:
        ctx (typer.Context): Typer context object.
        urls (list[str] | None, optional): List of URLs to download. Defaults to None.
        file_urls (Path | None, optional): Path to file containing URLs. Defaults to None.

    Returns:
        bool: True if download was successful, False otherwise.
    """
    if not urls:
        # Read the text file provided.
        if file_urls:
            text: str = file_urls.read_text()
            urls = text.splitlines()
        else:
            print("Provide either URLs, IDs or a file containing URLs (one per line).")

            raise typer.Abort()

    return _download(ctx, urls)


@dl_fav_group.command(
    name="tracks",
    help="Download your favorite track collection.",
)
def download_fav_tracks(ctx: typer.Context) -> bool:
    """Download your favorite track collection.

    Args:
        ctx (typer.Context): Typer context object.

    Returns:
        bool: Download result.
    """
    # Method name
    func_name_favorites: str = "tracks"

    return _download_fav_factory(ctx, func_name_favorites)


@dl_fav_group.command(
    name="artists",
    help="Download your favorite artist collection.",
)
def download_fav_artists(ctx: typer.Context) -> bool:
    """Download your favorite artist collection.

    Args:
        ctx (typer.Context): Typer context object.

    Returns:
        bool: Download result.
    """
    # Method name
    func_name_favorites: str = "artists"

    return _download_fav_factory(ctx, func_name_favorites)


@dl_fav_group.command(
    name="albums",
    help="Download your favorite album collection.",
)
def download_fav_albums(ctx: typer.Context) -> bool:
    """Download your favorite album collection.

    Args:
        ctx (typer.Context): Typer context object.

    Returns:
        bool: Download result.
    """
    # Method name
    func_name_favorites: str = "albums"

    return _download_fav_factory(ctx, func_name_favorites)


@dl_fav_group.command(
    name="videos",
    help="Download your favorite video collection.",
)
def download_fav_videos(ctx: typer.Context) -> bool:
    """Download your favorite video collection.

    Args:
        ctx (typer.Context): Typer context object.

    Returns:
        bool: Download result.
    """
    # Method name
    func_name_favorites: str = "videos"

    return _download_fav_factory(ctx, func_name_favorites)


def _download_fav_factory(ctx: typer.Context, func_name_favorites: str) -> bool:
    """Factory which helps to download items from the favorites collections.

    Args:
        ctx (typer.Context): Typer context object.
        func_name_favorites (str): Method name to call from `tidalapi` favorites object.

    Returns:
        bool: Download result.
    """
    # Call login method to validate the token.
    ctx.invoke(login, ctx)

    # Get the method from the module
    func_favorites: Callable = getattr(ctx.obj[CTX_TIDAL].session.user.favorites, func_name_favorites)
    # Get favorite videos
    media_urls: [str] = [media.share_url for media in func_favorites()]

    return _download(ctx, media_urls, try_login=False)


@app.command()
def gui(ctx: typer.Context):
    """Launch the GUI for the application.

    Args:
        ctx (typer.Context): Typer context object.
    """
    from tidal_dl_ng.gui import gui_activate

    ctx.invoke(login, ctx)
    gui_activate(ctx.obj[CTX_TIDAL])


def handle_sigint_term(signum, frame):
    """Set app abort event, so threads can check it and shutdown.

    Args:
        signum: Signal number.
        frame: Current stack frame.
    """
    handling_app: HandlingApp = HandlingApp()

    handling_app.event_abort.set()


if __name__ == "__main__":
    # Catch CTRL+C
    signal.signal(signal.SIGINT, handle_sigint_term)
    signal.signal(signal.SIGTERM, handle_sigint_term)

    app()