#ifndef YMF262_HAL_HPP
#define YMF262_HAL_HPP

#include <cstdint>
#include "GPIO.hpp"

template <class GPIOPolicy>
class YMF262_HAL{
     private:
    
     GPIOPolicy _gpio;
    uint32_t _t_icw_ticks;
    uint32_t _t_as_ticks;
    uint32_t _t_ah_ticks;
    uint32_t _t_csw_ticks;
    uint32_t _t_csr_ticks;
    uint32_t _t_ww_ticks;
    uint32_t _t_wds_ticks;
    uint32_t _t_wdh_ticks;
    uint32_t _t_rw_ticks;
    uint32_t _t_acc_ticks;
    uint32_t _t_rdh_ticks;
    uint32_t _t_recovery_ticks;

    void write_bus(Bank bank, Port port, uint8_t data){
        _gpio.set_a0(port);
        _gpio.set_a1(bank);
        _gpio.delay_ticks(_t_as_ticks);
        _gpio.set_cs(State::ACTIVE);
        _gpio.set_wr(State::ACTIVE);
        _gpio.set_data_bus(data);
        _gpio.delay_ticks(_t_wds_ticks);
        _gpio.set_wr(State::INACTIVE);
        _gpio.set_cs(State::INACTIVE);
        _gpio.delay_ticks(_t_wdh_ticks);
        _gpio.delay_ticks(_t_recovery_ticks);

    };
    
    public:

     
    YMF262_HAL(GPIOPolicy policy, uint32_t opl_clock, uint32_t cpu_clock){
        _t_icw_ticks = (400 * cpu_clock) / opl_clock;
        _t_recovery_ticks = (32 * cpu_clock) / opl_clock;
        double ticks_per_ns = (double)cpu_clock / 1.0e9;
        _t_as_ticks    = (uint32_t)(10  * ticks_per_ns);
        _t_ah_ticks    = (uint32_t)(10  * ticks_per_ns); 
        _t_csw_ticks   = (uint32_t)(100 * ticks_per_ns); 
        _t_ww_ticks    = (uint32_t)(100 * ticks_per_ns);
        _t_wds_ticks   = (uint32_t)(10  * ticks_per_ns); 
        _t_wdh_ticks   = (uint32_t)(20  * ticks_per_ns);
        _t_csr_ticks   = (uint32_t)(150 * ticks_per_ns); 
        _t_rw_ticks    = (uint32_t)(150 * ticks_per_ns);
        _t_acc_ticks   = (uint32_t)(150 * ticks_per_ns); 
        _t_rdh_ticks  = (uint32_t)(10  * ticks_per_ns);
    };

    void write(Bank bank, uint8_t reg, uint8_t data){
        write_bus(bank,Port::ADDRESS,reg);
        write_bus(bank,Port::DATA,data);
    };

};

#endif