//
// Copyright 2017 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//

#include "adi/common.h"
#include <uhd/exception.hpp>
#include <mpm/ad937x/adi_ctrl.hpp>
#include <mpm/types/log_buf.hpp>
#include <chrono>
#include <iostream>
#include <sstream>
#include <thread>

ad9371_spiSettings_t::ad9371_spiSettings_t(mpm::types::regs_iface* spi_iface_)
    : spi_iface(spi_iface_)
{
    spi_settings.chipSelectIndex     = 0; // set later
    spi_settings.writeBitPolarity    = 1; // unused
    spi_settings.longInstructionWord = 1;
    spi_settings.MSBFirst            = 1;
    spi_settings.CPHA                = 0;
    spi_settings.CPOL                = 0;
    spi_settings.enSpiStreaming      = 0; // unused
    spi_settings.autoIncAddrUp       = 0; // unused
    spi_settings.fourWireMode        = 1; // unused
    spi_settings.spiClkFreq_Hz       = 250000000; // currently unused
}

// TODO: change // not implemented to  meaningful errors

// close hardware pointers
commonErr_t CMB_closeHardware(void)
{
    // not implemented
    return COMMONERR_FAILED;
}

// GPIO function
commonErr_t CMB_setGPIO(uint32_t GPIO)
{
    // not implemented
    return COMMONERR_FAILED;
}

// hardware reset function
commonErr_t CMB_hardReset(uint8_t spiChipSelectIndex)
{
    // TODO: implement
    return COMMONERR_OK;
}

//
// SPI read/write functions
//

// allows the platform HAL to work with devices with various SPI settings
commonErr_t CMB_setSPIOptions(spiSettings_t* spiSettings)
{
    // not implemented
    return COMMONERR_OK;
}

// value of 0 deasserts all chip selects
commonErr_t CMB_setSPIChannel(uint16_t chipSelectIndex)
{
    // not implemented
    return COMMONERR_OK;
}

// single SPI byte write function
commonErr_t CMB_SPIWriteByte(spiSettings_t* spiSettings, uint16_t addr, uint8_t data)
{
    if (spiSettings == nullptr || spiSettings->MSBFirst == 0) {
        return COMMONERR_FAILED;
    }

    ad9371_spiSettings_t* spi = ad9371_spiSettings_t::make(spiSettings);
    try {
        spi->spi_iface->poke8(addr, data);
        return COMMONERR_OK;
    } catch (const std::exception& e) {
        // TODO: spit out a reasonable error here (that will survive the C API transition)
        std::stringstream ss;
        ss << "Error in CMB_SPIWriteByte: " << e.what();
        CMB_writeToLog(ADIHAL_LOG_ERROR,
            spiSettings->chipSelectIndex,
            ad9371_spi_errors_t::SPI_WRITE_ERROR,
            ss.str().c_str());
    }
    return COMMONERR_FAILED;
}

// multi SPI byte write function (address, data pairs)
commonErr_t CMB_SPIWriteBytes(
    spiSettings_t* spiSettings, uint16_t* addr, uint8_t* data, uint32_t count)
{
    if (spiSettings == nullptr || addr == nullptr || data == nullptr
        || spiSettings->MSBFirst == 0) {
        return COMMONERR_FAILED;
    }

    ad9371_spiSettings_t* spi = ad9371_spiSettings_t::make(spiSettings);
    try {
        for (size_t i = 0; i < count; ++i) {
            spi->spi_iface->poke8(addr[i], data[i]);
        }
        return COMMONERR_OK;
    } catch (const std::exception& e) {
        // TODO: spit out a reasonable error here (that will survive the C API transition)
        std::stringstream ss;
        ss << "Error in CMB_SPIWriteBytes: " << e.what();
        CMB_writeToLog(ADIHAL_LOG_ERROR,
            spiSettings->chipSelectIndex,
            ad9371_spi_errors_t::SPI_WRITE_ERROR,
            ss.str().c_str());
    }
    return COMMONERR_FAILED;
}

// single SPI byte read function
commonErr_t CMB_SPIReadByte(spiSettings_t* spiSettings, uint16_t addr, uint8_t* readdata)
{
    if (spiSettings == nullptr || readdata == nullptr || spiSettings->MSBFirst == 0) {
        return COMMONERR_FAILED;
    }

    ad9371_spiSettings_t* spi = ad9371_spiSettings_t::make(spiSettings);
    try {
        *readdata = spi->spi_iface->peek8(addr);
        return COMMONERR_OK;
    } catch (const std::exception& e) {
        // TODO: spit out a reasonable error here (that will survive the C API transition)
        std::stringstream ss;
        ss << "Error in CMB_SPIReadByte: " << e.what();
        CMB_writeToLog(ADIHAL_LOG_ERROR,
            spiSettings->chipSelectIndex,
            ad9371_spi_errors_t::SPI_READ_ERROR,
            ss.str().c_str());
    }
    return COMMONERR_FAILED;
}

// write a field in a single register
commonErr_t CMB_SPIWriteField(spiSettings_t* spiSettings,
    uint16_t addr,
    uint8_t field_val,
    uint8_t mask,
    uint8_t start_bit)
{
    ad9371_spiSettings_t* spi = ad9371_spiSettings_t::make(spiSettings);

    try {
        uint8_t current_value = spi->spi_iface->peek8(addr);
        uint8_t new_value     = ((current_value & ~mask) | (field_val << start_bit));
        spi->spi_iface->poke8(addr, new_value);
        return COMMONERR_OK;
    } catch (const std::exception& e) {
        // TODO: spit out a reasonable error here (that will survive the C API transition)
        std::stringstream ss;
        ss << "Error in CMB_SPIWriteField: " << e.what();
        CMB_writeToLog(ADIHAL_LOG_ERROR,
            spiSettings->chipSelectIndex,
            ad9371_spi_errors_t::SPI_WRITE_ERROR,
            ss.str().c_str());
    }
    return COMMONERR_FAILED;
}


// read a field in a single register
commonErr_t CMB_SPIReadField(spiSettings_t* spiSettings,
    uint16_t addr,
    uint8_t* field_val,
    uint8_t mask,
    uint8_t start_bit)
{
    ad9371_spiSettings_t* spi = ad9371_spiSettings_t::make(spiSettings);

    try {
        uint8_t value = spi->spi_iface->peek8(addr);
        *field_val    = static_cast<uint8_t>((value & mask) >> start_bit);
        return COMMONERR_OK;
    } catch (const std::exception& e) {
        // TODO: spit out a reasonable error here (that will survive the C API transition)
        std::stringstream ss;
        ss << "Error in CMB_SPIReadField: " << e.what();
        CMB_writeToLog(ADIHAL_LOG_ERROR,
            spiSettings->chipSelectIndex,
            ad9371_spi_errors_t::SPI_READ_ERROR,
            ss.str().c_str());
    }
    return COMMONERR_FAILED;
}

// platform timer functions

commonErr_t CMB_wait_ms(uint32_t time_ms)
{
    std::this_thread::sleep_for(std::chrono::milliseconds(time_ms));
    return COMMONERR_OK;
}
commonErr_t CMB_wait_us(uint32_t time_us)
{
    std::this_thread::sleep_for(std::chrono::microseconds(time_us));
    return COMMONERR_OK;
}

commonErr_t CMB_setTimeout_ms(spiSettings_t* spiSettings, uint32_t timeOut_ms)
{
    ad9371_spiSettings_t* mpm_spi = ad9371_spiSettings_t::make(spiSettings);
    mpm_spi->timeout_start        = std::chrono::steady_clock::now();
    mpm_spi->timeout_duration     = std::chrono::milliseconds(timeOut_ms);
    return COMMONERR_OK;
}
commonErr_t CMB_setTimeout_us(spiSettings_t* spiSettings, uint32_t timeOut_us)
{
    ad9371_spiSettings_t* mpm_spi = ad9371_spiSettings_t::make(spiSettings);
    mpm_spi->timeout_start        = std::chrono::steady_clock::now();
    mpm_spi->timeout_duration     = std::chrono::microseconds(timeOut_us);
    return COMMONERR_OK;
}
commonErr_t CMB_hasTimeoutExpired(spiSettings_t* spiSettings)
{
    ad9371_spiSettings_t* mpm_spi = ad9371_spiSettings_t::make(spiSettings);
    auto current_time             = std::chrono::steady_clock::now();
    if ((std::chrono::steady_clock::now() - mpm_spi->timeout_start)
        > mpm_spi->timeout_duration) {
        return COMMONERR_FAILED;
    } else {
        return COMMONERR_OK;
    }
}

// platform logging functions
commonErr_t CMB_openLog(const char* filename)
{
    // not implemented
    return COMMONERR_FAILED;
}
commonErr_t CMB_closeLog(void)
{
    // not implemented
    return COMMONERR_FAILED;
}

commonErr_t CMB_writeToLog(
    ADI_LOGLEVEL level, uint8_t deviceIndex, uint32_t errorCode, const char* comment)
{
    mpm::types::log_level_t mpm_log_level;
    if (level & ADIHAL_LOG_ERROR) {
        mpm_log_level = mpm::types::log_level_t::ERROR;
    } else if (level & ADIHAL_LOG_WARNING) {
        mpm_log_level = mpm::types::log_level_t::WARNING;
    } else {
        mpm_log_level = mpm::types::log_level_t::TRACE;
    }
    // FIXME: This caused segfault with the async pattern call to c++ from boost python
    // mpm::types::log_buf::make_singleton()->post(
    //     mpm_log_level,
    //     "AD937X",
    //     str(boost::format("[Device ID %d] [Error code: %d] %s")
    //         % int(deviceIndex) % errorCode % comment)
    // );

    return COMMONERR_OK;
}
commonErr_t CMB_flushLog(void)
{
    // not implemented
    return COMMONERR_FAILED;
}

/* platform FPGA AXI register read/write functions */
commonErr_t CMB_regRead(uint32_t offset, uint32_t* data)
{
    // not implemented
    return COMMONERR_FAILED;
}
commonErr_t CMB_regWrite(uint32_t offset, uint32_t data)
{
    // not implemented
    return COMMONERR_FAILED;
}

/* platform DDR3 memory read/write functions */
commonErr_t CMB_memRead(uint32_t offset, uint32_t* data, uint32_t len)
{
    // not implemented
    return COMMONERR_FAILED;
}
commonErr_t CMB_memWrite(uint32_t offset, uint32_t* data, uint32_t len)
{
    // not implemented
    return COMMONERR_FAILED;
}
