#ifndef _HP_CONF_
#define _HP_CONF_

#include "pchheader.hpp"

/**
 * Manages the central contract config and context structs.
 * Contains functions to contract config operations such as create/rekey/load.
 */
namespace conf
{

    constexpr const char *SELF_HOST = "127.0.0.1";

    // Typedef to represent ip address and port pair.
    typedef std::pair<std::string, uint16_t> ip_port_pair;

    // The operating mode of the contract node.
    enum OPERATING_MODE
    {
        OBSERVER = 0, // Observer mode. Only emits NUPs. Does not participate in voting.
        PROPOSER = 1  // Consensus participant mode.
    };

    // Holds contextual information about the currently loaded contract.
    struct contract_ctx
    {
        std::string command;             // The CLI command issued to launch HotPocket
        std::string exe_dir;             // Hot Pocket executable dir.
        std::string websocketd_exe_path; // Websocketd executable file path.
        std::string websocat_exe_path;   // Websocketd executable file path.
        std::string hpfs_exe_path;       // hpfs executable file path.

        std::string contract_dir;       // Contract base directory full path
        std::string hist_dir;           // Contract ledger history dir full path
        std::string state_dir;          // Contract state maintenence path (hpfs path)
        std::string state_rw_dir;       // Contract executation read/write state path.
        std::string state_read_req_dir; // Contract executation state path for read requests.
        std::string log_dir;            // Contract log dir full path
        std::string config_dir;         // Contract config dir full path
        std::string config_file;        // Full path to the contract config file
        std::string tls_key_file;       // Full path to the tls secret key file
        std::string tls_cert_file;      // Full path to the tls certificate
    };

    // Holds all the contract config values.
    struct contract_config
    {
        // Config elements which are initialized in memory (these are not directly loaded from the config file)

        std::string pubkey;                            // Contract public key bytes
        std::string seckey;                            // Contract secret key bytes
        std::vector<std::string> runtime_binexec_args; // Contract binary execution args used during runtime.
        std::vector<std::string> runtime_appbill_args; // Appbill execution args used during runtime.
        OPERATING_MODE current_mode = OPERATING_MODE::OBSERVER; // Current operating mode of the contract (Observer/Proposer)

        // Config elements which are loaded from the config file.

        OPERATING_MODE startup_mode = OPERATING_MODE::OBSERVER; // Configured startup operating mode of the contract (Observer/Proposer).
        std::string pubkeyhex;               // Contract hex public key
        std::string seckeyhex;               // Contract hex secret key
        std::string binary;                  // Full path to the contract binary
        std::string binargs;                 // CLI arguments to pass to the contract binary
        std::string appbill;                 // binary to execute for appbill
        std::string appbillargs;             // any arguments to supply to appbill binary by default
        std::set<ip_port_pair> peers;        // Set of peers keyed by "<ip address>:<port>" concatenated format
        std::unordered_set<std::string> unl; // Unique node list (list of binary public keys)
        uint16_t peerport = 0;               // Listening port for peer connections
        uint16_t roundtime = 0;              // Consensus round time in ms
        uint16_t pubport = 0;                // Listening port for public user connections

        uint64_t pubmaxsize = 0;   // User message max size in bytes
        uint64_t pubmaxcpm = 0;    // User message rate (characters(bytes) per minute)
        uint64_t pubmaxbadmpm = 0; // User bad messages per minute
        uint16_t pubmaxcons = 0;   // Max inbound user connections

        uint64_t peermaxsize = 0;     // Peer message max size in bytes
        uint64_t peermaxcpm = 0;      // Peer message rate (characters(bytes) per minute)
        uint64_t peermaxdupmpm = 0;   // Peer max duplicate messages per minute
        uint64_t peermaxbadmpm = 0;   // Peer bad messages per minute
        uint64_t peermaxbadsigpm = 0; // Peer bad signatures per minute
        uint16_t peermaxcons = 0;     // Max inbound peer connections

        std::string loglevel;                    // Log severity level (debug, info, warn, error)
        std::unordered_set<std::string> loggers; // List of enabled loggers (console, file)
    };

    // Global contract context struct exposed to the application.
    // Other modeuls will access context values via this.
    extern contract_ctx ctx;

    // Global configuration struct exposed to the application.
    // Other modeuls will access config values via this.
    extern contract_config cfg;

    int init();

    int rekey();

    int create_contract();

    void set_contract_dir_paths(std::string exepath, std::string basedir);

    //------Internal-use functions for this namespace.

    int load_config();

    int save_config();

    int validate_config();

    int validate_contract_dir_paths();

    int is_schema_valid(const rapidjson::Document &d);

    int binpair_to_hex();

    int hexpair_to_bin();

    void change_operating_mode(const OPERATING_MODE mode);

} // namespace conf

#endif