#pragma once
#include <ircolib/types.hpp>
#include <capstone/capstone.h>
#include <xbyak/xbyak.h>
#include <array>

namespace weee::core {
struct mem;
struct broadway {
    broadway();
    void set_pc(ircolib::u32);
    void run(mem &);

    private:
    ircolib::u32 fetch(mem &);
    void print_disasm(ircolib::u32);
    void execute(ircolib::u32, mem &);

    bool disasm_available = true;
    ircolib::u32 pc = 0, lr = 0, ctr = 0, cr = 0, srr0 = 0, fpscr = 0, msr = 0;
    union {
        struct {
            unsigned bytecount : 7;
            unsigned : 22;
            unsigned ca : 1;
            unsigned ov : 1;
            unsigned so : 1;
        };

        ircolib::u32 raw;
    } xer;

    void set_cr(ircolib::u8 value, ircolib::u8 index) {
        cr &= ~(0xffff << index * 4);
        cr |= (value << index * 4);
    }

    bool get_cr_bit(ircolib::u8 index, ircolib::u8 bit) { return (cr >> index * 4) & (1 << (4 - bit)); }

    // bat registers indexes
    static constexpr std::size_t BAT_LOWER_OFFSET = 0;
    static constexpr std::size_t BAT_UPPER_OFFSET = 8;

    std::array<ircolib::u32, 16> ibat, dbat;
    std::array<ircolib::u32, 32> gpr{};

    struct Fgr {
        ircolib::u64 ps0, ps1;
    };

    std::array<Fgr, 32> fgrs{};

    // ircolib::u32 const_gpr_lookup{};
    csh capstone;
    // Xbyak::CodeGenerator code;

    // instructions
    void decode_special1(ircolib::u32, mem &);
    void decode_special2(ircolib::u32, mem &);
    void decode_special3(ircolib::u32, mem &);

    void branch(bool, bool, ircolib::u32);
    bool test_cond_and_ctr(ircolib::u32);

    void andi(ircolib::u32);
    void add(ircolib::u32);
    void addis(ircolib::u32);
    void addi(ircolib::u32);
    void ori(ircolib::u32);
    void oris(ircolib::u32);
    void bx(ircolib::u32);
    void bcx(ircolib::u32);
    void mftspr(bool, ircolib::u32);
    void stw(ircolib::u32, mem &);
    void stwu(ircolib::u32, mem &);
    void stbu(ircolib::u32, mem &);
    void sth(ircolib::u32, mem &);
    void lwz(ircolib::u32, mem &);
    void lfd(ircolib::u32, mem &);
    void bclrx(ircolib::u32);
    void cmpi(ircolib::u32);
    void cmpli(ircolib::u32);
    void cmp(ircolib::u32);
    void cmpl(ircolib::u32);
    void rlwinm(ircolib::u32);
    void lwzu(ircolib::u32, mem &);
    void rfi(ircolib::u32);
    void mtfsf(ircolib::u32);
    void mtfsb1(ircolib::u32);
    void mtfsb0(ircolib::u32);
    void mfmsr(ircolib::u32);
    void nand(ircolib::u32);
    void subf(ircolib::u32);
    void or (ircolib::u32);

    inline void cr0_update(bool condition, ircolib::s32 result) {
        if (condition) {
            const bool b0 = result < 0;
            const bool b1 = result >= 0;
            const bool b2 = result == 0;
            const bool b3 = xer.so;
            set_cr((b0 << 3) | (b1 << 2) | (b2 << 1) | (b3 << 0), 0);
        }
    }

    inline void cr1_update(bool condition) {
        if (condition) {
            const ircolib::u8 field = (fpscr >> 28) & 0xf;
            set_cr(field, 1);
        }
    }
};
} // namespace weee::core