/*
Crafter®.Graphics
Copyright (C) 2026 Catcrafts®
catcrafts.net

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 3.0 as published by the Free Software Foundation;

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
*/
export module Crafter.Graphics:UITheme;
import std;
import :UILength;
import :UIWidgets;
import :Font;

export namespace Crafter::UI {
    // Flat theme — named slots, no cascading. Users keep one Theme value
    // (typically as a member of their scene) and reference its slots on
    // each widget via `.style(theme.primary)` etc. No automatic
    // propagation: per-widget overrides win.
    struct Theme {
        // Buttons
        ButtonStyle primary;          // default action ("Save", "Play")
        ButtonStyle secondary;        // neutral action ("Cancel", "Back")
        ButtonStyle danger;           // destructive ("Delete", "Quit")
        ButtonStyle disabled;         // greyed out

        // Inputs
        InputFieldStyle input;

        // Generic palette
        Color text          {0.95f, 0.95f, 0.95f, 1.0f};
        Color textMuted     {0.65f, 0.65f, 0.65f, 1.0f};
        Color panel         {0.10f, 0.11f, 0.13f, 1.0f};
        Color panelElevated {0.14f, 0.15f, 0.17f, 1.0f};
        Color border        {0.30f, 0.30f, 0.30f, 1.0f};
        Color focusRing     {0.40f, 0.70f, 1.00f, 1.0f};

        // Typography. Optional: not every widget requires the theme's font;
        // builder methods can override per-instance.
        Font* defaultFont = nullptr;
        float defaultFontSize = 16.0f;
    };

    namespace themes {
        // A balanced dark-mode theme — matches the kind of game-menu palette
        // 3DForts uses. Users can copy + tweak.
        inline Theme default_dark() {
            Theme t;

            t.primary.background        = Color{0.22f, 0.45f, 0.78f, 1.0f};
            t.primary.hoverBackground   = Color{0.28f, 0.55f, 0.92f, 1.0f};
            t.primary.pressedBackground = Color{0.16f, 0.36f, 0.66f, 1.0f};
            t.primary.textColor         = Color{1.0f,  1.0f,  1.0f,  1.0f};

            t.secondary.background        = Color{0.20f, 0.20f, 0.20f, 1.0f};
            t.secondary.hoverBackground   = Color{0.28f, 0.28f, 0.28f, 1.0f};
            t.secondary.pressedBackground = Color{0.14f, 0.14f, 0.14f, 1.0f};

            t.danger.background        = Color{0.62f, 0.20f, 0.20f, 1.0f};
            t.danger.hoverBackground   = Color{0.78f, 0.26f, 0.26f, 1.0f};
            t.danger.pressedBackground = Color{0.46f, 0.14f, 0.14f, 1.0f};
            t.danger.textColor         = Color{1.0f,  0.95f, 0.95f, 1.0f};

            t.disabled.background = Color{0.15f, 0.15f, 0.15f, 1.0f};
            t.disabled.textColor  = Color{0.50f, 0.50f, 0.50f, 1.0f};

            return t;
        }
    }
}