from textual.theme import Theme

import site_themes


def to_textual_theme(theme: dict) -> Theme:
    colors = theme["colors"]
    border_start, border_end = theme.get("activeBorder") or (colors["accent"], colors["accent"])
    return Theme(
        name=theme["id"],
        primary=border_start,
        secondary=colors["blue"],
        accent=border_end,
        foreground=colors["foreground"],
        background=colors["dark_background"],
        surface=colors["background"],
        panel=colors["lighter_background"],
        boost=colors["selection"],
        warning=colors["yellow"],
        error=colors["red"],
        success=colors["green"],
        dark=theme.get("mode") != "light",
        variables={
            "text-muted": colors["muted"],
            "border": border_start,
            "border-blurred": colors["selection"],
            "block-cursor-background": colors["accent"],
            "block-cursor-foreground": colors["dark_background"],
            "block-cursor-text-style": "bold",
            "block-cursor-blurred-background": colors["selection"],
            "block-hover-background": colors["selection"],
            "footer-key-foreground": colors["accent"],
            "input-selection-background": f"{colors['accent']} 35%",
            "input-cursor-background": colors["foreground"],
            "scrollbar": colors["selection"],
            "scrollbar-hover": colors["muted"],
            "scrollbar-active": colors["accent"],
        },
    )


def load_site_themes() -> list[Theme]:
    try:
        themes = site_themes.load_themes()
    except (OSError, ValueError):
        return []
    textual_themes = []
    for theme in themes:
        try:
            textual_themes.append(to_textual_theme(theme))
        except (KeyError, ValueError):
            continue
    return textual_themes


def default_theme_id() -> str | None:
    return site_themes.default_theme_id()