yaze/src/app/zelda3/dungeon/room_object.h

#ifndef YAZE_APP_ZELDA3_DUNGEON_ROOM_OBJECT_H
#define YAZE_APP_ZELDA3_DUNGEON_ROOM_OBJECT_H

#include <array>
#include <cstdint>
#include <stdexcept>
#include <string>
#include <vector>

#include "app/emu/cpu.h"
#include "app/emu/video/ppu.h"
#include "app/gfx/snes_palette.h"
#include "app/gfx/snes_tile.h"
#include "app/rom.h"
#include "app/zelda3/dungeon/object_names.h"

namespace yaze {
namespace app {
namespace zelda3 {
namespace dungeon {

class DungeonObjectRenderer : public SharedROM {
 public:
  struct PseudoVram {
    std::vector<gfx::Bitmap> sheets;
    // TODO: Initialize with mock VRAM data
  };

  DungeonObjectRenderer() {
    // TODO: Constructor implementation
  }

  void LoadObject(uint16_t objectId) {
    // Prepare the CPU and memory environment
    memory_.Initialize(rom()->vector());

    // Fetch the subtype pointers for the given object ID
    auto subtypeInfo = FetchSubtypeInfo(objectId);

    // Configure the object based on the fetched information
    ConfigureObject(subtypeInfo);

    // Run the CPU emulation for the object's draw routines
    RenderObject(subtypeInfo);
  }

 private:
  struct SubtypeInfo {
    uint16_t subtypePtr;
    uint16_t routinePtr;
    // Additional fields as needed
  };

  SubtypeInfo FetchSubtypeInfo(uint16_t objectId) {
    SubtypeInfo info;

    // Determine the subtype based on objectId
    // Assuming subtype is determined by some bits in objectId; modify as needed
    uint8_t subtype = (objectId >> 8) & 0xFF;  // Example: top 8 bits

    // Based on the subtype, fetch the correct pointers
    switch (subtype) {
      case 1:  // Subtype 1
        info.subtypePtr = core::subtype1_tiles + (objectId & 0xFF) * 2;
        info.routinePtr = core::subtype1_tiles + 0x200 + (objectId & 0xFF) * 2;
        break;
      case 2:  // Subtype 2
        info.subtypePtr = core::subtype2_tiles + (objectId & 0x7F) * 2;
        info.routinePtr = core::subtype2_tiles + 0x80 + (objectId & 0x7F) * 2;
        break;
      case 3:  // Subtype 3
        info.subtypePtr = core::subtype3_tiles + (objectId & 0xFF) * 2;
        info.routinePtr = core::subtype3_tiles + 0x100 + (objectId & 0xFF) * 2;
        break;
      default:
        // Handle unknown subtype
        throw std::runtime_error("Unknown subtype for object ID: " +
                                 std::to_string(objectId));
    }

    // Convert pointers from ROM-relative to absolute (if necessary)
    // info.subtypePtr = ConvertToAbsolutePtr(info.subtypePtr);
    // info.routinePtr = ConvertToAbsolutePtr(info.routinePtr);

    return info;
  }

  void ConfigureObject(const SubtypeInfo& info) {
    // TODO: Use the information in info to set up the object's initial state
    // This may include setting CPU registers, loading specific tiles into VRAM,
    // etc.
  }

  void RenderObject(const SubtypeInfo& info) {
    // Assuming that the routine pointer and other necessary setup is done in
    // ConfigureObject Start CPU at the routine's entry point
    cpu.PC =
        info.routinePtr;  // info should be a member or passed as a parameter
    cpu.PB = 0x01;  // Set the program bank; adjust based on your memory mapping

    // Run the CPU emulation loop
    while (true) {
      // Fetch the next opcode
      uint8_t opcode = cpu.FetchByte();

      // Execute the fetched instruction
      cpu.ExecuteInstruction(opcode);

      // Handle any interrupts, if necessary
      cpu.HandleInterrupts();

      // Check if the end of the routine is reached (typically RTS instruction)
      if (opcode == 0x60) {  // RTS opcode
        break;
      }

      // Additional checks can be added here, e.g., maximum cycles or
      // instructions

      // Update the PPU state if necessary
      // ppu.Update();

      // After PPU update, reflect any changes in the Bitmap(s)
      // UpdateBitmapFromPPU();
    }

    // Post-rendering operations (if any)
    // PostRenderOperations();
  }

  // Helper function to update Bitmap from PPU state
  void UpdateBitmapFromPPU() {
    // TODO: Implement logic to transfer PPU state changes to the Bitmap
    // This involves reading the tile data and other graphics info from PPU
    // and rendering it to the Bitmap object
  }

  // Optional: Handle any operations after rendering
  void PostRenderOperations() {
    // TODO: Implement any cleanup or additional processing needed after
    // rendering
  }

  // Members
  std::vector<uint8_t> rom_data_;
  emu::MemoryImpl memory_;
  emu::ClockImpl clock_;
  emu::CPU cpu{memory_, clock_};
  emu::PPU ppu{memory_, clock_};
  gfx::Bitmap bitmap;
  PseudoVram vram_;
};

//   void CreateVramFromRoomBlockset() {
//     // auto bitmap_manager = rom()->bitmap_manager();
//     // uint16_t room_id = 0;
//     // auto room_blockset = rom()->room_blockset_ids[room_id];

//     // for (const auto blockset_id : room_blockset) {
//     //   auto blockset = bitmap_manager[(uint16_t)blockset_id];
//     //   vram_.sheets.push_back(*blockset.get());
//     // }
//   }

//     int i = 0;
//     for (const auto routine_ptr : routine_ptrs) {
//       cpu.PC = routine_ptr - 2;
//       cpu.PB = 0x01;

//       auto cycles_to_run = clock_.GetCycleCount();

//       while (true) {
//         auto opcode = cpu.FetchByte();
//         // Fetch and execute an instruction
//         cpu.ExecuteInstruction(opcode);

//         // Handle any interrupts, if necessary
//         cpu.HandleInterrupts();

//         // Check if the instruction is RTS
//         if (opcode == 0x60) {
//           break;
//         }
//         i++;
//         if (i > 50) {
//           break;
//         }
//       }
//     }

enum class SpecialObjectType { Chest, BigChest, InterroomStairs };

struct Tile {};

enum Background2 {
  Off,
  Parallax,
  Dark,
  OnTop,
  Translucent,
  Addition,
  Normal,
  Transparent,
  DarkRoom  // TODO: Determine if DarkRoom will stay there or not
};

enum Sorting {
  All = 0,
  Wall = 1,
  Horizontal = 2,
  Vertical = 4,
  NonScalable = 8,
  Dungeons = 16,
  Floors = 32,
  SortStairs = 64
};

enum ObjectOption {
  Nothing = 0,
  Door = 1,
  Chest = 2,
  Block = 4,
  Torch = 8,
  Bgr = 16,
  Stairs = 32
};

struct LayerType {
  LayerType(uint8_t t) : type(t) {}

  uint8_t type;
};

class RoomObject : public SharedROM {
 public:
  enum LayerType { BG1 = 0, BG2 = 1, BG3 = 2 };

  RoomObject(int16_t id, uint8_t x, uint8_t y, uint8_t size, uint8_t layer = 0)
      : id(id),
        x_(x),
        y_(y),
        size_(size),
        Layer(static_cast<LayerType>(layer)),
        nx(x),
        ny(y),
        ox(x),
        oy(y),
        width(16),
        height(16),
        uniqueID(0) {}

  virtual void Draw() {
    // ... Draw function implementation here
  }

  void getObjectSize() {
    previousSize = size_;
    size_ = 1;
    // Draw();
    getBaseSize();
    UpdateSize();
    size_ = 2;
    // Draw();
    getSizeSized();
    UpdateSize();
    size_ = previousSize;
    // collisionPoint.clear();
  }

  void getBaseSize() {
    basewidth = width;
    baseheight = height;
  }

  void getSizeSized() {
    sizeheight = height - baseheight;
    sizewidth = width - basewidth;
  }

  // virtual void Draw() { collisionPoint.clear(); }

  void UpdateSize() {
    width = 8;
    height = 8;
  }

  void addTiles(int nbr, int pos) {
    auto rom_data = rom()->data();
    for (int i = 0; i < nbr; i++) {
      // tiles.push_back(
      //     gfx::Tile16(rom_data[pos + (i * 2)], rom_data[pos + (i * 2) + 1]));
    }
  }

  void DrawTile(Tile t, int xx, int yy, std::vector<uint8_t>& current_gfx16,
                std::vector<uint8_t>& tiles_bg1_buffer,
                std::vector<uint8_t>& tiles_bg2_buffer,
                ushort tileUnder = 0xFFFF);

 protected:
  int16_t id;

  uint8_t x_;
  uint8_t y_;
  uint8_t size_;

  LayerType Layer;

  std::vector<uint8_t> preview_object_data_;

  bool allBgs = false;
  bool lit = false;
  std::vector<gfx::Tile16> tiles;
  int tileIndex = 0;
  std::string name;
  uint8_t nx;
  uint8_t ny;
  uint8_t ox;
  uint8_t oy;
  int width;
  int height;
  int basewidth;
  int baseheight;
  int sizewidth;
  int sizeheight;
  ObjectOption options = ObjectOption::Nothing;
  int offsetX = 0;
  int offsetY = 0;
  bool diagonalFix = false;
  bool selected = false;
  int previewId = 0;
  uint8_t previousSize = 0;
  bool showRectangle = false;
  // std::vector<Point> collisionPoint;
  int uniqueID = 0;
  uint8_t z = 0;
  bool deleted = false;
};

class Subtype1 : public RoomObject {
 public:
  std::vector<Tile> tiles;
  std::string name;
  bool allBgs;
  Sorting sort;
  int tile_count_;

  Subtype1(int16_t id, uint8_t x, uint8_t y, uint8_t size, uint8_t layer,
           int tileCount)
      : RoomObject(id, x, y, size, layer), tile_count_(tileCount) {
    auto rom_data = rom()->data();
    name = Type1RoomObjectNames[id & 0xFF];
    int pos =
        core::tile_address +
        static_cast<int16_t>(
            (rom_data[core::subtype1_tiles + ((id & 0xFF) * 2) + 1] << 8) +
            rom_data[core::subtype1_tiles + ((id & 0xFF) * 2)]);
    addTiles(tile_count_, pos);
    sort = (Sorting)(Sorting::Horizontal | Sorting::Wall);
  }

  void Draw() override {
    for (int s = 0; s < size_ + (tile_count_ == 8 ? 1 : 0); s++) {
      for (int i = 0; i < tile_count_; i++) {
        // DrawTile(tiles[i], ((s * 2)) * 8, (i / 2) * 8);
      }
    }
  }
};

class Subtype2_Multiple : public RoomObject {
 public:
  int tx = 0;
  int ty = 0;
  std::vector<Tile> tiles;
  std::string name;
  bool allBgs;
  Sorting sort;

  Subtype2_Multiple(int16_t id, uint8_t x, uint8_t y, uint8_t size,
                    uint8_t layer)
      : RoomObject(id, x, y, size, layer) {
    // ... Constructor implementation here
  }

  void Draw() override {
    // ... Draw function implementation here
  }

  void setdata(const std::string& name, int tx, int ty, bool allbg = false) {
    // ... setdata function implementation here
  }

  // Other member functions and variables
};

class Subtype3 : public RoomObject {};

}  // namespace dungeon
}  // namespace zelda3
}  // namespace app
}  // namespace yaze

#endif  // YAZE_APP_ZELDA3_DUNGEON_ROOM_OBJECT_H