#include "bios_string_attribute.hpp"

#include "common/utils.hpp"

#include <phosphor-logging/lg2.hpp>

#include <variant>

PHOSPHOR_LOG2_USING;

using namespace pldm::utils;

namespace pldm
{
namespace responder
{
namespace bios
{
BIOSStringAttribute::BIOSStringAttribute(const Json& entry,
                                         DBusHandler* const dbusHandler) :
    BIOSAttribute(entry, dbusHandler)
{
    std::string strTypeTmp = entry.at("string_type");
    auto iter = strTypeMap.find(strTypeTmp);
    if (iter == strTypeMap.end())
    {
        error("Wrong string type '{TYPE}' for attribute '{ATTRIBUTE}'", "TYPE",
              strTypeTmp, "ATTRIBUTE", name);
        throw std::invalid_argument("Wrong string type");
    }
    stringInfo.stringType = static_cast<uint8_t>(iter->second);

    stringInfo.minLength = entry.at("minimum_string_length");
    stringInfo.maxLength = entry.at("maximum_string_length");
    stringInfo.defString = entry.at("default_string");
    stringInfo.defLength =
        static_cast<uint16_t>((stringInfo.defString).length());

    pldm_bios_table_attr_entry_string_info info = {
        0,
        readOnly,
        stringInfo.stringType,
        stringInfo.minLength,
        stringInfo.maxLength,
        stringInfo.defLength,
        stringInfo.defString.data(),
    };

    const char* errmsg = nullptr;
    auto rc = pldm_bios_table_attr_entry_string_info_check(&info, &errmsg);
    if (rc != PLDM_SUCCESS)
    {
        error(
            "Wrong field for string attribute '{ATTRIBUTE}', error '{ERROR}', minimum string length '{MINIMUM_STRING_LENGTH}', maximum string length '{MAXIMUM_STRING_LENGTH}', default string length '{DEFAULT_STRING_LENGTH}' and default string '{DEFAULT_STRING}'",
            "ATTRIBUTE", name, "ERROR", errmsg, "MINIMUM_STRING_LENGTH",
            stringInfo.minLength, "MAXIMUM_STRING_LENGTH", stringInfo.maxLength,
            "DEFAULT_STRING_LENGTH", stringInfo.defLength, "DEFAULT_STRING",
            stringInfo.defString);
        throw std::invalid_argument("Wrong field for string attribute");
    }
}

void BIOSStringAttribute::setAttrValueOnDbus(
    const pldm_bios_attr_val_table_entry* attrValueEntry,
    const pldm_bios_attr_table_entry*, const BIOSStringTable&)
{
    if (!dBusMap.has_value())
    {
        return;
    }

    PropertyValue value =
        table::attribute_value::decodeStringEntry(attrValueEntry);
    dbusHandler->setDbusProperty(*dBusMap, value);
}

std::string BIOSStringAttribute::getAttrValue(
    std::optional<std::string> persisted)
{
    if (!dBusMap.has_value())
    {
        return persisted.value_or(stringInfo.defString);
    }
    try
    {
        return dbusHandler->getDbusProperty<std::string>(
            dBusMap->objectPath.c_str(), dBusMap->propertyName.c_str(),
            dBusMap->interface.c_str());
    }
    catch (const std::exception& e)
    {
        error(
            "Failed to get string attribute '{ATTRIBUTE}' at path '{PATH}' and interface '{INTERFACE}' for property '{PROPERTY}', error - {ERROR}",
            "ATTRIBUTE", name, "PATH", dBusMap->objectPath, "INTERFACE",
            dBusMap->interface, "PROPERTY", dBusMap->propertyName, "ERROR", e);
        return persisted.value_or(stringInfo.defString);
    }
}

void BIOSStringAttribute::constructEntry(
    const BIOSStringTable& stringTable, Table& attrTable, Table& attrValueTable,
    std::optional<std::variant<int64_t, std::string>> optAttributeValue)
{
    pldm_bios_table_attr_entry_string_info info = {
        stringTable.findHandle(name), readOnly,
        stringInfo.stringType,        stringInfo.minLength,
        stringInfo.maxLength,         stringInfo.defLength,
        stringInfo.defString.data(),
    };

    auto attrTableEntry =
        table::attribute::constructStringEntry(attrTable, &info);
    auto [attrHandle, attrType,
          _] = table::attribute::decodeHeader(attrTableEntry);

    std::optional<std::string> persisted;
    if (optAttributeValue.has_value() && optAttributeValue->index() == 1)
    {
        persisted = std::get<std::string>(*optAttributeValue);
    }

    auto currStr = getAttrValue(std::move(persisted));

    table::attribute_value::constructStringEntry(attrValueTable, attrHandle,
                                                 attrType, currStr);
}

int BIOSStringAttribute::updateAttrVal(Table& newValue, uint16_t attrHdl,
                                       uint8_t attrType,
                                       const PropertyValue& newPropVal)
{
    try
    {
        const auto& newStringValue = std::get<std::string>(newPropVal);
        table::attribute_value::constructStringEntry(newValue, attrHdl,
                                                     attrType, newStringValue);
    }
    catch (const std::bad_variant_access& e)
    {
        error("Invalid value passed for the property - {ERROR}", "ERROR", e);
        return PLDM_ERROR;
    }
    return PLDM_SUCCESS;
}

void BIOSStringAttribute::generateAttributeEntry(
    const std::variant<int64_t, std::string>& attributevalue,
    Table& attrValueEntry)
{
    std::string value = std::get<std::string>(attributevalue);
    uint16_t len = value.size();

    attrValueEntry.resize(
        sizeof(pldm_bios_attr_val_table_entry) + sizeof(uint16_t) + len - 1);

    auto entry = new (attrValueEntry.data()) pldm_bios_attr_val_table_entry;

    entry->attr_type = 1;
    memcpy(entry->value, &len, sizeof(uint16_t));
    memcpy(entry->value + sizeof(uint16_t), value.c_str(), value.size());
}

} // namespace bios
} // namespace responder
} // namespace pldm