#pragma once

#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

// SIP Methods
typedef enum {
    SIP_METHOD_UNKNOWN = 0,
    SIP_METHOD_INVITE,
    SIP_METHOD_ACK,
    SIP_METHOD_BYE,
    SIP_METHOD_CANCEL,
    SIP_METHOD_REGISTER,
    SIP_METHOD_OPTIONS,
    SIP_METHOD_INFO,
    SIP_METHOD_UPDATE,
    SIP_METHOD_PRACK
} sip_method_t;

// Geparste SIP-Nachricht
typedef struct {
    bool is_request;            // true = Request, false = Response

    // Request Line
    sip_method_t method;
    char request_uri[128];

    // Status Line (Response)
    int status_code;
    char reason_phrase[64];

    // Headers
    char via[256];
    char from[256];
    char from_tag[64];
    char to[256];
    char to_tag[64];
    char call_id[128];
    int cseq;
    sip_method_t cseq_method;
    char contact[256];
    int content_length;
    char content_type[64];

    // Authorization
    char www_authenticate[512];
    char proxy_authenticate[512];

    // SDP Body
    char sdp_body[2048];
    bool has_sdp;

    // RTP Info aus SDP
    char rtp_ip[32];
    uint16_t rtp_port;
    uint8_t rtp_payload_type;

} sip_message_t;

/**
 * Parst eine SIP-Nachricht
 */
int sip_parse_message(const char* data, size_t len, sip_message_t* msg);

/**
 * Extrahiert URI aus Header
 */
int sip_extract_uri(const char* header, char* uri, size_t uri_len);

/**
 * Extrahiert Tag aus Header
 */
int sip_extract_tag(const char* header, char* tag, size_t tag_len);

/**
 * Extrahiert Display-Name aus Header
 */
int sip_extract_display_name(const char* header, char* name, size_t name_len);

/**
 * Parst SDP und extrahiert RTP-Info
 */
int sip_parse_sdp(sip_message_t* msg);

#ifdef __cplusplus
}
#endif