/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2013-2018 Winlin
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <assert.h>

#include "../../objs/include/srs_librtmp.h"

void parse_amf0_object(char* p, srs_amf0_t args)
{
    char opvt = 0; // object property value type.
    const char* opnp = NULL; // object property name ptr.
    const char* opvp = NULL; // object property value ptr.
    
    while (*p) {
        switch (*p++) {
            case 'O':
                while (*p && *p++ != ':') {
                }
                if (*p++ == '1') {
                    printf("amf0 object start\n");
                } else {
                    printf("amf0 object end\n");
                }
                break;
            case 'N':
                opvt = *p++;
                if (*p++ != ':') {
                    printf("object property must split by :.\n");
                    exit(-1);
                }
                opnp = p++;
                while (*p && *p++ != ':') {
                }
                p[-1] = 0;
                opvp = p;
                printf("amf0 %c property[%s]=%s\n", opvt, opnp, opvp);
                switch(opvt) {
                    case 'S':
                        srs_amf0_object_property_set(args, opnp, srs_amf0_create_string(opvp));
                        break;
                    default:
                        printf("unsupported object property.\n");
                        exit(-1);
                }
                *p=0;
                break;
            default:
                printf("only supports an object arg.\n");
                exit(-1);
        }
    }
}

// srs debug info.
char* ip = NULL;
char* sig = NULL;
int pid = 0, cid = 0;
int major = 0, minor = 0, revision= 0, build = 0;
// User options.
int complex_handshake = 0;
const char* rtmp_url = NULL;
const char* output_flv = NULL;
const char* swfUrl = NULL;
const char* tcUrl = NULL;
const char* pageUrl = NULL;
srs_amf0_t args = NULL;

int do_proxy(srs_rtmp_t rtmp, srs_flv_t flv)
{
    int ret = 0;
    
    if ((ret = srs_rtmp_dns_resolve(rtmp)) != 0) {
        srs_human_trace("dns resolve failed, ret=%d", ret);
        return ret;
    }
    
    if ((ret = srs_rtmp_connect_server(rtmp)) != 0) {
        srs_human_trace("connect to server failed, ret=%d", ret);
        return ret;
    }
    
    if (complex_handshake) {
        if ((ret = srs_rtmp_do_complex_handshake(rtmp)) != 0) {
            srs_human_trace("complex handshake failed, ret=%d", ret);
            return ret;
        }
        srs_human_trace("do complex handshake success");
    } else {
        if ((ret = srs_rtmp_do_simple_handshake(rtmp)) != 0) {
            srs_human_trace("simple handshake failed, ret=%d", ret);
            return ret;
        }
        srs_human_trace("do simple handshake success");
    }
    
    if ((ret = srs_rtmp_set_connect_args(rtmp, tcUrl, swfUrl, pageUrl, args)) != 0) {
        srs_human_trace("set connect args failed, ret=%d", ret);
        return ret;
    }
    
    if ((ret = srs_rtmp_connect_app(rtmp)) != 0) {
        srs_human_trace("connect vhost/app failed, ret=%d", ret);
        return ret;
    }
    
    if ((ret = srs_rtmp_get_server_sig(rtmp, &sig)) != 0) {
        srs_human_trace("Retrieve server ID failed, ret=%d", ret);
        return ret;
    }
    if ((ret = srs_rtmp_get_server_id(rtmp, &ip, &pid, &cid)) != 0) {
        srs_human_trace("Retrieve server ID failed, ret=%d", ret);
        return ret;
    }
    if ((ret = srs_rtmp_get_server_version(rtmp, &major, &minor, &revision, &build)) != 0) {
        srs_human_trace("Retrieve server version failed, ret=%d", ret);
        return ret;
    }
    srs_human_trace("connect ok, ip=%s, server=%s/%d.%d.%d.%d, pid=%d, cid=%d",
                    ip, sig, major, minor, revision, build, pid, cid);
    
    if ((ret = srs_rtmp_play_stream(rtmp)) != 0) {
        srs_human_trace("play stream failed, ret=%d", ret);
        return ret;
    }
    srs_human_trace("play stream success");
    
    if (flv) {
        // flv header
        char header[9];
        // 3bytes, signature, "FLV",
        header[0] = 'F';
        header[1] = 'L';
        header[2] = 'V';
        // 1bytes, version, 0x01,
        header[3] = 0x01;
        // 1bytes, flags, UB[5] 0, UB[1] audio present, UB[1] 0, UB[1] video present.
        header[4] = 0x03; // audio + video.
        // 4bytes, dataoffset
        header[5] = 0x00;
        header[6] = 0x00;
        header[7] = 0x00;
        header[8] = 0x09;
        if ((ret = srs_flv_write_header(flv, header)) != 0) {
            srs_human_trace("write flv header failed, ret=%d", ret);
            return ret;
        }
    }
    
    int64_t nb_packets = 0;
    uint32_t pre_timestamp = 0;
    int64_t pre_now = -1;
    int64_t start_time = -1;
    char buffer[1024];
    for (;;) {
        int size;
        char type;
        char* data;
        uint32_t timestamp;
        
        if ((ret = srs_rtmp_read_packet(rtmp, &type, &timestamp, &data, &size)) != 0) {
            srs_human_trace("read rtmp packet failed, ret=%d", ret);
            return ret;
        }
        
        if (pre_now == -1) {
            pre_now = srs_utils_time_ms();
        }
        if (start_time == -1) {
            start_time = srs_utils_time_ms();
        }
        
        if ((ret = srs_human_format_rtmp_packet2(buffer, sizeof(buffer), type, timestamp, data, size, pre_timestamp, pre_now, start_time, nb_packets++)) != 0) {
            srs_human_trace("print rtmp packet failed, ret=%d", ret);
            return ret;
        }
        srs_human_trace("%s", buffer);
        
        pre_timestamp = timestamp;
        pre_now = srs_utils_time_ms();
        
        // we only write some types of messages to flv file.
        int is_flv_msg = type == SRS_RTMP_TYPE_AUDIO
        || type == SRS_RTMP_TYPE_VIDEO || type == SRS_RTMP_TYPE_SCRIPT;
        
        // for script data, ignore except onMetaData
        if (type == SRS_RTMP_TYPE_SCRIPT) {
            if (!srs_rtmp_is_onMetaData(type, data, size)) {
                is_flv_msg = 0;
            }
        }
        
        if (flv) {
            if (is_flv_msg) {
                if ((ret = srs_flv_write_tag(flv, type, timestamp, data, size)) != 0) {
                    srs_human_trace("dump rtmp packet failed, ret=%d", ret);
                    return ret;
                }
            } else {
                srs_human_trace("drop message type=%#x, size=%dB", type, size);
            }
        }
        
        free(data);
    }
    
    return ret;
}

int main(int argc, char** argv)
{
    srs_flv_t flv = NULL;
    srs_rtmp_t rtmp = NULL;
    
    printf("dump rtmp stream to flv file\n");
    printf("srs(ossrs) client librtmp library.\n");
    printf("version: %d.%d.%d\n", srs_version_major(), srs_version_minor(), srs_version_revision());
    printf("@refer to http://rtmpdump.mplayerhq.hu/rtmpdump.1.html\n");
    
    int show_help = 0;
    const char* short_options = "hxr:o:s:t:p:C:";
    struct option long_options[] = {
        {"rtmp", required_argument, 0, 'r'},
        {"flv", required_argument, 0, 'o'},
        {"swfUrl", required_argument, 0, 's'},
        {"tcUrl", required_argument, 0, 't'},
        {"pageUrl", required_argument, 0, 'p'},
        {"conn", required_argument, 0, 'C'},
        {"complex", no_argument, 0, 'x'},
        {"help", no_argument, 0, 'h'},
        {0, 0, 0, 0}
    };
    
    int opt = 0;
    int option_index = 0;
    while((opt = getopt_long(argc, argv, short_options, long_options, &option_index)) != -1){
        switch(opt){
            case 'r':
                rtmp_url = optarg;
                break;
            case 'o':
                output_flv = optarg;
                break;
            case 's':
                swfUrl = optarg;
                break;
            case 't':
                tcUrl = optarg;
                break;
            case 'p':
                pageUrl = optarg;
                break;
            case 'C':
                if (!args) {
                    args = srs_amf0_create_object();
                }
                char* p = (char*)optarg;
                parse_amf0_object(p, args);
                break;
            case 'x':
                complex_handshake = 1;
                break;
            case 'h':
                show_help = 1;
                break;
            default:
                printf("unsupported opt.\n");
                exit(-1);
        }
    }
    
    if (!rtmp_url || show_help) {
        printf("Usage: %s -r url [-o output] [-s swfUrl] [-t tcUrl] [-p pageUrl] [-C conndata] [--complex] [-h]\n"
            "Options:\n"
            "   --rtmp -r url\n"
            "       URL of the server and media content.\n"
            "   --flv -o output\n"
            "       Specify the output file name. If the name is − or is omitted, the stream is written to stdout.\n"
            "   --complex\n"
            "       Whether use complex handshake(srs-librtmp with ssl required).\n"
            "   --swfUrl -s url\n"
            "       URL of the SWF player for the media. By default no value will be sent.\n"
            "   --tcUrl -t url\n"
            "       URL of the target stream. Defaults to rtmp[e]://host[:port]/app/playpath.\n"
            "   --pageUrl -p url\n"
            "       URL of the web page in which the media was embedded. By default no value will be sent.\n"
            "   −−conn −C type:data\n"
            "       Append arbitrary AMF data to the Connect message. The type must be B for Boolean, N for number, S for string, O for object, or Z for null. For Booleans the data must be either 0 or 1 for FALSE or TRUE, respectively. Likewise for Objects the data must be 0 or 1 to end or begin an object, respectively. Data items in subobjects may be named, by prefixing the type with 'N' and specifying the name before the value, e.g. NB:myFlag:1. This option may be used multiple times to construct arbitrary AMF sequences. E.g.\n"
            "       −C B:1 −C S:authMe −C O:1 −C NN:code:1.23 −C NS:flag:ok −C O:0\n"
            "       -C O:1 -C NS:CONN:\" -C B:4Rg9vr0\" -C O:0\n"
            "       @remark, support a object args only.\n"
            "   --help -h\n"
            "       Print a summary of command options.\n"
            "For example:\n"
            "   %s -r rtmp://127.0.0.1:1935/live/livestream -o output.flv\n"
            "   %s -h\n",
            argv[0], argv[0], argv[0]);
        exit(-1);
    }
    
    srs_human_trace("rtmp url: %s", rtmp_url);
    srs_human_trace("handshake: %s", (complex_handshake? "complex" : "simple"));
    srs_human_trace("swfUrl: %s", swfUrl);
    srs_human_trace("pageUrl: %s", pageUrl);
    srs_human_trace("tcUrl: %s", tcUrl);
    if (output_flv) {
        srs_human_trace("flv output path: %s", output_flv);
    } else {
        srs_human_trace("output to console");
    }
    
    rtmp = srs_rtmp_create(rtmp_url);
    if (output_flv) {
        flv = srs_flv_open_write(output_flv);
    }
    
    int ret = 0;
    if ((ret = do_proxy(rtmp, flv)) != 0) {
        srs_human_trace("Dump RTMP failed, ret=%d", ret);
    }
    
    srs_rtmp_destroy(rtmp);
    srs_flv_close(flv);
    srs_human_trace("completed");
    
    return 0;
}