palette_debug.h

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#pragma once
 
#include <string>
#include <vector>
 
#include "app/gfx/core/bitmap.h"
#include "app/gfx/types/snes_palette.h"
 
struct SDL_Surface;
 
namespace yaze::zelda3 {
 
enum class PaletteDebugLevel { INFO, WARNING, ERROR };
 
struct PaletteDebugEvent {
  std::string location;  // e.g., "Room::RenderRoomGraphics"
  std::string message;   // What happened
  PaletteDebugLevel level = PaletteDebugLevel::INFO;
  int palette_id = -1;                 // Which palette
  int color_count = 0;                 // How many colors
  std::vector<uint8_t> sample_colors;  // RGB of first 3 colors for verification
  uint64_t timestamp_ms = 0;           // Timestamp for timeline analysis
  int sequence_number = 0;             // Order of events
};
 
// Color comparison for debugging
struct ColorComparison {
  int x, y;                                    // Position sampled
  uint8_t palette_index;                       // Palette index at position
  uint8_t actual_r, actual_g, actual_b;        // Actual rendered color
  uint8_t expected_r, expected_g, expected_b;  // Expected from palette
  bool matches;                                // Do they match?
};
 
class PaletteDebugger {
 public:
  // Maximum number of events to store (prevents memory exhaustion in WASM)
  static constexpr size_t kMaxEvents = 1000;
  static constexpr size_t kMaxComparisons = 500;
 
  static PaletteDebugger& Get();
 
  void LogPaletteLoad(const std::string& location, int palette_id,
                      const gfx::SnesPalette& palette);
  void LogPaletteApplication(const std::string& location, int palette_id,
                             bool success, const std::string& reason = "");
  void LogTextureCreation(const std::string& location, bool has_palette,
                          int color_count);
  void LogSurfaceState(const std::string& location, SDL_Surface* surface);
 
  // Palette data access for comparison
  void SetCurrentPalette(const gfx::SnesPalette& palette);
  void SetCurrentRenderPalette(const std::vector<SDL_Color>& palette);
  void SetCurrentBitmap(gfx::Bitmap* bitmap);
 
  // Pixel sampling for debugging
  ColorComparison SamplePixelAt(int x, int y) const;
  std::vector<ColorComparison> GetColorComparisons() const {
    return comparisons_;
  }
  void AddComparison(const ColorComparison& comp) {
    AddComparisonLimited(comp);
  }
  void ClearComparisons() { comparisons_.clear(); }
 
  // Compute checksum for palette integrity verification
  uint32_t ComputePaletteChecksum(const gfx::SnesPalette& palette) const;
 
  const std::vector<PaletteDebugEvent>& GetEvents() const { return events_; }
  void Clear() {
    events_.clear();
    comparisons_.clear();
    current_palette_.clear();
    current_render_palette_.clear();
    current_bitmap_ = nullptr;
  }
 
  // WASM exports
#ifdef __EMSCRIPTEN__
  std::string ExportToJSON() const;
  std::string ExportColorComparisonsJSON() const;
  std::string SamplePixelJSON(int x, int y) const;
 
  // Full state dump for AI analysis (Gemini/Antigravity integration)
  std::string ExportFullStateJSON() const;
  std::string ExportPaletteDataJSON() const;
  std::string ExportTimelineJSON() const;
 
  // Analysis helpers
  std::string GetDiagnosticSummary() const;
  std::string GetHypothesisAnalysis() const;
#endif
 
 private:
  PaletteDebugger() = default;
 
  // Helper to add events with size limit enforcement
  void AddEvent(const PaletteDebugEvent& event) {
    if (events_.size() >= kMaxEvents) {
      // Remove oldest half when at limit (keeps recent events)
      events_.erase(events_.begin(), events_.begin() + kMaxEvents / 2);
    }
    events_.push_back(event);
  }
 
  // Helper to add comparisons with size limit enforcement
  void AddComparisonLimited(const ColorComparison& comp) {
    if (comparisons_.size() >= kMaxComparisons) {
      comparisons_.erase(comparisons_.begin(),
                         comparisons_.begin() + kMaxComparisons / 2);
    }
    comparisons_.push_back(comp);
  }
 
  std::vector<PaletteDebugEvent> events_;
  std::vector<ColorComparison> comparisons_;
  gfx::SnesPalette current_palette_;
  std::vector<SDL_Color> current_render_palette_;
  gfx::Bitmap* current_bitmap_ = nullptr;
  int sequence_counter_ = 0;
};
 
}  // namespace yaze::zelda3