#ifndef VI_H
#define VI_H

#include <cstdint>

namespace N64 {
namespace Mmio {
namespace VI {

constexpr uint32_t PADDR_VI_CTRL = 0x04400000;
constexpr uint32_t PADDR_VI_ORIGIN = 0x04400004;
constexpr uint32_t PADDR_VI_WIDTH = 0x04400008;
constexpr uint32_t PADDR_VI_INTR = 0x0440000C;
constexpr uint32_t PADDR_VI_V_CURRENT = 0x04400010;
constexpr uint32_t PADDR_VI_BURST = 0x04400014;
constexpr uint32_t PADDR_VI_V_SYNC = 0x04400018;
constexpr uint32_t PADDR_VI_H_SYNC = 0x0440001C;
constexpr uint32_t PADDR_VI_H_SYNC_LEAP = 0x04400020;
constexpr uint32_t PADDR_VI_H_VIDEO = 0x04400024;
constexpr uint32_t PADDR_VI_V_VIDEO = 0x04400028;
constexpr uint32_t PADDR_VI_V_BURST = 0x0440002C;
constexpr uint32_t PADDR_VI_X_SCALE = 0x04400030;
constexpr uint32_t PADDR_VI_Y_SCALE = 0x04400034;

namespace ViStatusFlags {
enum ViStatusFlags : uint32_t { SERRATE = 0x40 };
}

// Video Interface
class VI {
  private:
    static VI instance;

  public:
    uint32_t reg_status;
    uint32_t reg_origin;
    uint32_t reg_width;
    // FIXME: this name is confusing. Correct?
    uint32_t reg_intr;
    uint32_t reg_current;
    uint32_t reg_burst;
    uint32_t reg_vsync;
    uint32_t reg_hsync;
    uint32_t reg_hsync_leap;
    uint32_t reg_h_video;
    uint32_t reg_v_video;
    uint32_t reg_v_burst;
    uint32_t reg_x_scale;
    uint32_t reg_y_scale;

    // Always equal to the half of vsync. Probably.
    int num_half_lines;
    int cycles_per_half_line;

  public:
    VI() {}

    void reset();

    uint32_t read_paddr32(uint32_t paddr) const;

    void write_paddr32(uint32_t paddr, uint32_t value);

    uint32_t get_reg_status() const { return reg_status; }

    void set_reg_current(uint32_t value) { reg_current = value; }

    uint32_t get_reg_current() const { return reg_current; }

    int get_num_half_lines() const { return num_half_lines; }

    uint32_t get_reg_intr() const { return reg_intr; }

    int get_cycles_per_half_line() const { return cycles_per_half_line; }

    int get_num_fields() const;

    inline static VI &get_instance() { return instance; }
};

} // namespace VI
} // namespace Mmio

Mmio::VI::VI &g_vi();

} // namespace N64

#endif