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#include <chrono>
#include <cstdint>
#include <nlohmann/json.hpp>
#include <string>
#include <token.hpp>
#include <tokenBuilder.hpp>
#include <vector>

namespace bnet
{
using nlohmann::json;

static constexpr std::uint64_t kTOKEN_CONTENT_MIN_LENGTH{10};

class HearthstoneTokenBuilder : TokenBuilder
{
  private:
    std::shared_ptr<Token> _currentToken;
    bool _allowBattleNetApiCall{false};
    bool _allowUpdateSourceFile{false};
    bool _allowExpiredToken{false};
    std::vector<std::string> _credentialJsonPaths;
    [[nodiscard]]
    bool isUpdateSourceFileAllowed() const;
    [[nodiscard]]
    bool isTokenValid(const json& iTokenJson) const;
    static size_t curlCallbackStringOutput(void* iPtr,
                                           size_t iSize,
                                           size_t iNmemb,
                                           std::string* iUserData);
    [[nodiscard]]
    std::chrono::seconds getCurrentTime() const;
    [[nodiscard]]
    Token getTokenWithApi(const std::string& iCredentialsJsonFilePath) const;
    [[nodiscard]]
    Token getTokenWithApi(const json& iCredentials) const;
    void writeTokenToLocalFile(std::shared_ptr<Token>& iToken,
                               const std::string& iTokenFileOutputPath) const;

  public:
    HearthstoneTokenBuilder(std::span<std::string> iJsonPaths);

    template <typename... CredentialJsonPaths>
    HearthstoneTokenBuilder(CredentialJsonPaths... iCredentialJsonPaths)
    {
        (_credentialJsonPaths.push_back(iCredentialJsonPaths), ...);
    }

    template <typename... CredentialJsonPaths>
    HearthstoneTokenBuilder& addCredentialJsonFiles(CredentialJsonPaths... iCredentialJsonPaths)
    {
        (_credentialJsonPaths.push_back(iCredentialJsonPaths), ...);
        return *this;
    }

    HearthstoneTokenBuilder& allowBattleNetApiCall();
    HearthstoneTokenBuilder& allowUpdateSourceFile();
    HearthstoneTokenBuilder& allowExpiredToken();
    /**
     * @return Create an access token to perform API requests.
     * First, the cache files are checked. (Which ones?)
     * A new token is computed if the token lifetimes expired,
     * or if there is no token at all.
     */
    HearthstoneTokenBuilder& buildToken() override;
    [[nodiscard]]
    std::shared_ptr<Token> getToken() override;
};
} // namespace bnet