defmodule LiveFilter.Theme do
  @moduledoc """
  Theme definitions for LiveFilter command-style filter chips.

  Provides three preset themes: `:default`, `:minimal`, and `:bordered`.
  Each theme defines CSS classes for different chip elements.

  ## Usage

      LiveFilter.Theme.get(:default, :chip)
      # => "inline-flex items-center bg-base-100 border border-base-300 rounded-lg h-8"

  ## Custom Themes

  You can pass custom class overrides via the filter config or bar assigns.
  """

  # Using DaisyUI btn classes ensures consistent height/styling in host apps
  # since DaisyUI classes are generated by the plugin regardless of content scanning
  # Base chip class uses btn btn-sm; the variant (outline/ghost/soft) is applied separately
  # via the variant attribute passed to the bar component
  @themes %{
    default: %{
      chip: "btn btn-sm gap-0 px-0 font-normal",
      field: "flex items-center gap-1.5 px-2.5 border-r border-base-300",
      operator:
        "px-2 text-base-content/70 hover:text-base-content hover:bg-base-200 rounded cursor-pointer",
      values: "flex items-center gap-1 px-2",
      badge: "badge badge-sm gap-1",
      remove: "px-2 opacity-60 hover:opacity-100 cursor-pointer",
      icon: ""
    },
    minimal: %{
      chip: "btn btn-sm gap-0 px-0 font-normal",
      field: "flex items-center gap-1.5 px-2",
      operator: "px-1.5 text-base-content/50 hover:text-base-content cursor-pointer",
      values: "flex items-center gap-1 px-1.5",
      badge: "text-sm",
      remove: "px-1.5 opacity-60 hover:opacity-100 cursor-pointer",
      icon: ""
    },
    bordered: %{
      chip: "btn btn-sm btn-primary gap-0 px-0 font-normal",
      field: "flex items-center gap-1.5 px-2.5 border-r border-primary/20",
      operator:
        "px-2 text-primary/70 hover:text-primary hover:bg-primary/10 rounded cursor-pointer",
      values: "flex items-center gap-1 px-2",
      badge: "badge badge-primary badge-sm gap-1",
      remove: "px-2 opacity-60 hover:opacity-100 cursor-pointer",
      icon: ""
    },
    # Neutral theme: no DaisyUI btn classes, uses theme-aware utilities
    # Works seamlessly with light/dark themes without CSS overrides
    neutral: %{
      chip:
        "inline-flex items-center h-8 text-sm gap-0 px-0 font-normal bg-base-100 border border-base-300 rounded-lg text-base-content hover:bg-base-200 transition-colors",
      field: "flex items-center gap-1.5 px-2.5 border-r border-base-300",
      operator:
        "px-2 text-base-content/70 hover:text-base-content hover:bg-base-200 rounded cursor-pointer",
      values: "flex items-center gap-1 px-2",
      badge: "badge badge-soft badge-sm gap-1 rounded",
      remove: "px-2 opacity-60 hover:opacity-100 cursor-pointer",
      icon: ""
    }
  }

  @doc """
  Gets a CSS class string for the given theme and element.

  ## Elements

  - `:chip` - The outer chip container
  - `:field` - The field label section with icon
  - `:operator` - The operator dropdown trigger
  - `:values` - The values/badges section
  - `:badge` - Individual value badges
  - `:remove` - Remove button (both value and filter)
  - `:icon` - Default icon styling

  ## Examples

      iex> LiveFilter.Theme.get(:default, :chip)
      "inline-flex items-center bg-base-100 border border-base-300 rounded-lg h-8 text-sm"

      iex> LiveFilter.Theme.get(:bordered, :badge)
      "badge badge-primary badge-sm gap-1"
  """
  @spec get(atom(), atom()) :: String.t()
  def get(theme_name, element) when is_atom(theme_name) and is_atom(element) do
    @themes[theme_name][element] || @themes[:default][element] || ""
  end

  @doc """
  Returns the list of available theme names.
  """
  @spec available_themes() :: [atom()]
  def available_themes, do: Map.keys(@themes)

  @doc """
  Returns all classes for a given theme.
  """
  @spec get_theme(atom()) :: map()
  def get_theme(theme_name) do
    @themes[theme_name] || @themes[:default]
  end
end