// Glitch Effect - Chromatic aberration with CRT scanlines
// Windows open/close with RGB channel splitting and scanline overlay
//
// Adjustable parameters:
// - split (0.04): RGB split intensity - higher = more separation
// - scanline (0.08): Scanline visibility - higher = more prominent
// - uv.y * 400.0: Scanline density - higher = more lines

animations {
    window-open {
        duration-ms 400
        curve "linear"
        custom-shader r"
            vec4 open_color(vec3 coords_geo, vec3 size_geo) {
                if (coords_geo.x < 0.0 || coords_geo.x > 1.0 || coords_geo.y < 0.0 || coords_geo.y > 1.0) return vec4(0.0);
                float progress = niri_clamped_progress;
                float glitch = 1.0 - progress;
                vec2 uv = coords_geo.xy;

                // RGB channel splitting - channels converge as window opens
                float split = glitch * 0.04;
                vec3 cr = niri_geo_to_tex * vec3(uv + vec2(split, 0.0), 1.0);
                vec3 cg = niri_geo_to_tex * vec3(uv, 1.0);
                vec3 cb = niri_geo_to_tex * vec3(uv - vec2(split, 0.0), 1.0);

                float r = texture2D(niri_tex, cr.st).r;
                float g = texture2D(niri_tex, cg.st).g;
                float b = texture2D(niri_tex, cb.st).b;
                float a = texture2D(niri_tex, cg.st).a;
                vec3 color = vec3(r, g, b);

                // CRT scanline effect
                float scanline = 1.0 - 0.08 + 0.08 * sin(uv.y * 400.0);

                return vec4(color * scanline, a * progress);
            }
        "
    }

    window-close {
        duration-ms 600
        curve "linear"
        custom-shader r"
            vec4 close_color(vec3 coords_geo, vec3 size_geo) {
                if (coords_geo.x < 0.0 || coords_geo.x > 1.0 || coords_geo.y < 0.0 || coords_geo.y > 1.0) return vec4(0.0);
                float progress = niri_clamped_progress;
                vec2 uv = coords_geo.xy;

                // RGB channel splitting - channels separate as window closes
                float split = progress * 0.04;
                vec3 cr = niri_geo_to_tex * vec3(uv + vec2(split, 0.0), 1.0);
                vec3 cg = niri_geo_to_tex * vec3(uv, 1.0);
                vec3 cb = niri_geo_to_tex * vec3(uv - vec2(split, 0.0), 1.0);

                float r = texture2D(niri_tex, cr.st).r;
                float g = texture2D(niri_tex, cg.st).g;
                float b = texture2D(niri_tex, cb.st).b;
                float a = texture2D(niri_tex, cg.st).a;
                vec3 color = vec3(r, g, b);

                // CRT scanline effect
                float scanline = 1.0 - 0.08 + 0.08 * sin(uv.y * 400.0);

                return vec4(color * scanline, a * (1.0 - progress));
            }
        "
    }
}