#ifndef SLB_SHADOW_SETTINGS_H
#define SLB_SHADOW_SETTINGS_H

/// Macro mess
#define SLB_SHADOW_SETTINGS_ADD_PRESET(preset, method, pcss_filter_samples, pcss_filter_small_samples, pcss_blocker_samples, pcss_size, pcss_size_min, pcss_light_width) \
    SLB_STATIC_CONST int   slb_shadow_settings_ ## preset ## _method                    = method; \
    SLB_STATIC_CONST int   slb_shadow_settings_ ## preset ## _pcss_filter_samples       = pcss_filter_samples; \
    SLB_STATIC_CONST int   slb_shadow_settings_ ## preset ## _pcss_filter_small_samples = pcss_filter_small_samples; \
    SLB_STATIC_CONST int   slb_shadow_settings_ ## preset ## _pcss_blocker_samples      = pcss_blocker_samples; \
    SLB_STATIC_CONST float slb_shadow_settings_ ## preset ## _pcss_size                 = pcss_size; \
    SLB_STATIC_CONST float slb_shadow_settings_ ## preset ## _pcss_size_min             = pcss_size_min; \
    SLB_STATIC_CONST float slb_shadow_settings_ ## preset ## _pcss_light_width          = pcss_light_width;

#define SLB_SHADOW_SETTINGS_APPLY_PRESET(preset) \
    SLB_STATIC_CONST int   slb_shadow_settings_method                    = slb_shadow_settings_ ## preset ## _method; \
    SLB_STATIC_CONST int   slb_shadow_settings_pcss_filter_samples       = slb_shadow_settings_ ## preset ## _pcss_filter_samples; \
    SLB_STATIC_CONST int   slb_shadow_settings_pcss_filter_small_samples = slb_shadow_settings_ ## preset ## _pcss_filter_small_samples; \
    SLB_STATIC_CONST int   slb_shadow_settings_pcss_blocker_samples      = slb_shadow_settings_ ## preset ## _pcss_blocker_samples; \
    SLB_STATIC_CONST float slb_shadow_settings_pcss_size                 = slb_shadow_settings_ ## preset ## _pcss_size; \
    SLB_STATIC_CONST float slb_shadow_settings_pcss_size_min             = slb_shadow_settings_ ## preset ## _pcss_size_min; \
    SLB_STATIC_CONST float slb_shadow_settings_pcss_light_width          = slb_shadow_settings_ ## preset ## _pcss_light_width;

/// Enums
SLB_STATIC_CONST int slb_shadow_method_linear        = 0x252827bd;
SLB_STATIC_CONST int slb_shadow_method_nice          = 0xeaa1fbca;
SLB_STATIC_CONST int slb_shadow_method_bicubic       = 0xcb35b7d8;
SLB_STATIC_CONST int slb_shadow_method_optimized_pcf = 0xcf7d64d5;
SLB_STATIC_CONST int slb_shadow_method_chs           = 0x15e654ad;
SLB_STATIC_CONST int slb_shadow_method_pcf           = 0x92726cc9;
SLB_STATIC_CONST int slb_shadow_method_vogel_chs     = 0x6f241210;
SLB_STATIC_CONST int slb_shadow_method_pcss          = 0xa9fa8994;

SLB_STATIC_CONST float slb_shadow_pcss_filter_gaussian_sigma = 0.5;

/// Real settings starts here
/// slb_shadow_animated_noise: change noise every frame
/// slb_shadow_pcss_early_quit: improves performance a bit in synthetic test but idk.
SLB_STATIC_CONST bool  slb_shadow_animated_noise  = false;  /// default false
SLB_STATIC_CONST bool  slb_shadow_pcss_early_quit = false;  /// default false
SLB_STATIC_CONST float slb_shadow_pcss_filter_samples_multiplier       = 1.0;  /// default 1.0
SLB_STATIC_CONST float slb_shadow_pcss_filter_small_samples_multiplier = 1.0;  /// default 1.0
SLB_STATIC_CONST float slb_shadow_pcss_blocker_samples_multiplier      = 1.0;  /// default 1.0
SLB_STATIC_CONST float slb_shadow_pcss_size_multiplier                 = 1.0;  /// default 1.0
SLB_STATIC_CONST float slb_shadow_pcss_size_min_multiplier             = 1.0;  /// default 1.0

/// Explanation:
///   sun_near - preset for sun near you
///   sun_near - preset for sun far from you
///   spot     - preset for spot lights e.g. flashlights
///   omni     - preset for omni lights e.g. some lamps
///   fallback - preset for ... rainlayer.ps IDK what it does

#ifndef SUN_QUALITY  /// Low quality

    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_near, slb_shadow_method_bicubic,       16, 16, 16, 8.0, 2.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_far,  slb_shadow_method_bicubic,       16, 16, 16, 8.0, 2.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(spot,     slb_shadow_method_bicubic,       16, 16, 16, 8.0, 2.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(omni,     slb_shadow_method_bicubic,       16, 16, 16, 8.0, 2.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(fallback, slb_shadow_method_bicubic,       16, 16, 16, 8.0, 2.0, 0.1)

#elif SUN_QUALITY==1 /// medium quality

    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_near, slb_shadow_method_optimized_pcf, 16, 16, 16, 8.0, 2.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_far,  slb_shadow_method_optimized_pcf, 16, 16, 16, 8.0, 2.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(spot,     slb_shadow_method_optimized_pcf, 16, 16, 16, 8.0, 2.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(omni,     slb_shadow_method_optimized_pcf, 16, 16, 16, 8.0, 2.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(fallback, slb_shadow_method_bicubic,       16, 16, 16, 8.0, 2.0, 0.1)

#elif SUN_QUALITY==2 /// high quality

    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_near, slb_shadow_method_vogel_chs,     16, 16, 16, 8.0, 3.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_far,  slb_shadow_method_vogel_chs,     16, 16, 16, 8.0, 3.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(spot,     slb_shadow_method_vogel_chs,     16, 16, 16, 8.0, 3.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(omni,     slb_shadow_method_vogel_chs,     16, 16, 16, 8.0, 3.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(fallback, slb_shadow_method_bicubic,       16, 16, 16, 8.0, 3.0, 0.1)

#elif SUN_QUALITY==3 /// ultra quality

    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_near, slb_shadow_method_pcss,          16, 16, 16, 8.0, 2.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_far,  slb_shadow_method_pcss,          16, 16, 16, 2.0, 2.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(spot,     slb_shadow_method_pcss,          16, 16, 16, 8.0, 2.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(omni,     slb_shadow_method_pcss,          16, 16, 16, 8.0, 2.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(fallback, slb_shadow_method_bicubic,       16, 16, 16, 8.0, 2.0, 0.1)

#elif SUN_QUALITY>=4 /// extreme quality

    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_near, slb_shadow_method_pcss,          32, 32, 32, 16.0, 2.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(sun_far,  slb_shadow_method_pcss,          32, 32, 32,  4.0, 2.0, 0.1)
    SLB_SHADOW_SETTINGS_ADD_PRESET(spot,     slb_shadow_method_pcss,          32, 32, 32, 16.0, 2.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(omni,     slb_shadow_method_pcss,          32, 32, 32, 16.0, 2.0, 0.02)
    SLB_SHADOW_SETTINGS_ADD_PRESET(fallback, slb_shadow_method_bicubic,       32, 32, 32, 16.0, 2.0, 0.1)

#endif

/// Real settings ends here

#if defined(SLB_SHADOW_SUN_NEAR)
    SLB_SHADOW_SETTINGS_APPLY_PRESET(sun_near)
#elif defined(SLB_SHADOW_SUN_FAR)
    SLB_SHADOW_SETTINGS_APPLY_PRESET(sun_far)
#elif defined(SLB_SHADOW_SPOT)
    SLB_SHADOW_SETTINGS_APPLY_PRESET(spot)
#elif defined(SLB_SHADOW_OMNI)
    SLB_SHADOW_SETTINGS_APPLY_PRESET(omni)
#else
    SLB_SHADOW_SETTINGS_APPLY_PRESET(fallback)
#endif

#endif /// SLB_SHADOW_SETTINGS_H