# Shared stylix theming helper: detects an active stylix palette on the
# host and renders it as a base16 `colors.css` overlay file. `colors.css`
# is the entire theme-swap contract for every frontend bundle in this
# project (`theme.css` derives every semantic var from these 16 slots —
# see docs/web-ui/css-vars.md), so "apply the operator's stylix palette"
# always reduces to "write this one file over the prebuilt dist's own
# `colors.css`" — no npm/esbuild rebuild needed.
#
# Two consumers today: `hive-c0re/theme.nix` (dashboard + agent
# frontend), `swarm-ui.nix` (the swarm-level UI). Factored out here
# rather than duplicated in both — same "one source, not a copy that
# agrees by inspection" reasoning `hive-gateway/vhost-lib.nix` gives for
# its own split. Both callers `import` this directly (not published via
# an option): unlike the gateway's vhost kit, this needs no per-service
# knowledge to construct, it's a pure read of the host's own top-level
# `config` — an option indirection would add a layer with nothing to
# publish through it.
#
# Guarded access makes `stylixThemeColors` a clean `null` when stylix
# isn't imported into the host config at all, so every caller's own
# `if stylixThemeColors != null then ... else <untouched package>`
# stays a zero-op when the operator hasn't opted in.
{
  lib,
  config,
  pkgs,
}:
let
  stylixThemeColors =
    if (config.stylix.enable or false) && ((config.lib.stylix or { }) ? colors) then
      config.lib.stylix.colors.withHashtag
    else
      null;
  themedColorsCss =
    c:
    pkgs.writeText "hyperhive-colors.css" ''
      :root {
        --base00: ${c.base00};
        --base01: ${c.base01};
        --base02: ${c.base02};
        --base03: ${c.base03};
        --base04: ${c.base04};
        --base05: ${c.base05};
        --base06: ${c.base06};
        --base07: ${c.base07};
        --base08: ${c.base08};
        --base09: ${c.base09};
        --base0A: ${c.base0A};
        --base0B: ${c.base0B};
        --base0C: ${c.base0C};
        --base0D: ${c.base0D};
        --base0E: ${c.base0E};
        --base0F: ${c.base0F};
      }
    '';
in
{
  inherit stylixThemeColors themedColorsCss;
}