#include "espstrutils.h"

#include "sdkconfig.h"
#define LOG_LOCAL_LEVEL CONFIG_ESPCPPUTILS_LOG_LOCAL_LEVEL

#include <assert.h>

// esp-idf includes
#include <esp_log.h>
#include <sodium/utils.h>

// 3rdparty lib includes
#include <fmt/core.h>

// local includes
#include "futurecpp.h"

namespace espcpputils {
namespace {
constexpr const char * const TAG = "ESPCPPUTILS";
}

std::string toString(sntp_sync_mode_t val)
{
    switch (val)
    {
    case SNTP_SYNC_MODE_IMMED:  return "IMMED";
    case SNTP_SYNC_MODE_SMOOTH: return "SMOOTH";
    default:
        ESP_LOGW(TAG, "unknown sntp_sync_mode_t(%i)", std::to_underlying(val));
        return fmt::format("Unknown sntp_sync_mode_t({})", std::to_underlying(val));
    }
}

std::string toString(sntp_sync_status_t val)
{
    switch (val)
    {
    case SNTP_SYNC_STATUS_RESET:       return "RESET";
    case SNTP_SYNC_STATUS_COMPLETED:   return "COMPLETED";
    case SNTP_SYNC_STATUS_IN_PROGRESS: return "IN_PROGRESS";
    default:
        ESP_LOGW(TAG, "unknown sntp_sync_status_t(%i)", std::to_underlying(val));
        return fmt::format("Unknown sntp_sync_status_t({})", std::to_underlying(val));
    }
}

std::string toString(esp_log_level_t val)
{
    switch (val)
    {
    case ESP_LOG_NONE:    return "NONE";
    case ESP_LOG_ERROR:   return "ERROR";
    case ESP_LOG_WARN:    return "WARN";
    case ESP_LOG_INFO:    return "INFO";
    case ESP_LOG_DEBUG:   return "DEBUG";
    case ESP_LOG_VERBOSE: return "VERBOSE";
    default:
        ESP_LOGW(TAG, "unknown esp_log_level_t(%i)", std::to_underlying(val));
        return fmt::format("Unknown esp_log_level_t({})", std::to_underlying(val));
    }
}

std::string toString(esp_reset_reason_t val)
{
    switch (val)
    {
    case ESP_RST_UNKNOWN:   return "UNKNOWN";
    case ESP_RST_POWERON:   return "POWERON";
    case ESP_RST_EXT:       return "EXT";
    case ESP_RST_SW:        return "SW";
    case ESP_RST_PANIC:     return "PANIC";
    case ESP_RST_INT_WDT:   return "INT_WDT";
    case ESP_RST_TASK_WDT:  return "TASK_WDT";
    case ESP_RST_WDT:       return "WDT";
    case ESP_RST_DEEPSLEEP: return "DEEPSLEEP";
    case ESP_RST_BROWNOUT:  return "BROWNOUT";
    case ESP_RST_SDIO:      return "SDIO";
    default:
        ESP_LOGW(TAG, "unknown esp_reset_reason_t(%i)", std::to_underlying(val));
        return fmt::format("Unknown esp_reset_reason_t({})", std::to_underlying(val));
    }
}

std::string toHexString(std::basic_string_view<unsigned char> buf)
{
    std::string hex(buf.size() * 2 + 1, {});
    assert(hex.size() == buf.size() * 2 + 1);

    sodium_bin2hex(hex.data(), hex.size(), buf.data(), buf.size());

    hex.resize(hex.size() - 1);
    assert(hex.size() == buf.size() * 2);

    return hex;
}

tl::expected<std::basic_string_view<unsigned char>, std::string> fromHexString(std::string_view str)
{
    const auto binMaxLen = (str.size()+1)/2;
    uint8_t binBuf[binMaxLen];

    size_t binLen;
    if (const auto result = sodium_hex2bin(binBuf, binMaxLen, str.data(), str.size(), NULL, &binLen, NULL); result != 0)
    {
        ESP_LOGW(TAG, "sodium_hex2bin() failed with %i", result);
        return tl::make_unexpected(fmt::format("sodium_hex2bin() failed with {}", result));
    }

    if (binLen != str.size() / 2)
    {
        ESP_LOGW(TAG, "invalid hex");
        return tl::make_unexpected("invalid hex");
    }

    const std::basic_string_view<unsigned char> bin{binBuf, binLen};

    return bin;
}

} // namespace espcpputils