// The contents of this file are subject to the BOINC Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://boinc.berkeley.edu/license_1.0.txt
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is the Berkeley Open Infrastructure for Network Computing.
//
// The Initial Developer of the Original Code is the SETI@home project.
// Portions created by the SETI@home project are Copyright (C) 2002
// University of California at Berkeley. All Rights Reserved.
//
// Contributor(s):
//

// db_dump: dump database views in XML format
//
// usage: [-d n] db_dump -dump_spec file
// -d   debug level (1,2,3)
//
// dump_spec file:
// <boinc_db_dump_spec>
//   <output_dir>x</output_dir>
//   <final_output_dir>x</final_output_dir>
//   <enumeration>
//     <table>user</table>
//     <filename>x</filename>
//     <sort>x</sort>      x = id, total_credit, expavg_credit
//     <output>
//       [<recs_per_file>n</recs_per_file>]
//       [<detail/>]
//       [<compression>x</compression> ] x = zip or gzip
//     </output>
//     ...
//   </enumeration>
// ...
// </boinc_db_dump_spec>

#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string>
#include <vector>

#include "boinc_db.h"
#include "filesys.h"
#include "util.h"
#include "error_numbers.h"
#include "md5_file.h"
#include "parse.h"

#include "sched_config.h"
#include "sched_util.h"
#include "sched_msgs.h"

using std::string;
using std::vector;

#define LOCKFILE "db_dump.out"

#define COMPRESSION_NONE    0
#define COMPRESSION_GZIP    1
#define COMPRESSION_ZIP     2

#define SORT_NONE           0
#define SORT_ID             1
#define SORT_TOTAL_CREDIT   2
#define SORT_EXPAVG_CREDIT  3

#define TABLE_USER  0
#define TABLE_TEAM  1
#define TABLE_HOST  2

// must match the above
char* table_name[3] = {"user", "team", "host"};
char* tag_name[3] = {"users", "teams", "hosts"};

struct OUTPUT {
    int recs_per_file;
    bool detail;
    int compression;
    class ZFILE* zfile;
    class NUMBERED_ZFILE* nzfile;
    int parse(FILE*);
};

struct ENUMERATION {
    int table;
    int sort;
    char filename[256];
    vector<OUTPUT> outputs;
    int parse(FILE*);
    int make_it_happen(char*);
};

struct DUMP_SPEC {
    char output_dir[256];
    char final_output_dir[256];
    vector<ENUMERATION> enumerations;
    int parse(FILE*);
};

int OUTPUT::parse(FILE* in) {
    char buf[256], buf2[256];

    recs_per_file = 0;
    detail = false;
    compression = COMPRESSION_NONE;
    zfile = 0;
    nzfile = 0;
    while (fgets(buf, 256, in)) {
        if (match_tag(buf, "</output>")) return 0;
        if (parse_int(buf, "<recs_per_file>", recs_per_file)) continue;
        if (match_tag(buf, "<detail/>")) {
            detail = true;
            continue;
        }
        if (parse_str(buf, "<compression>", buf2, sizeof(buf2))) {
            if (!strcmp(buf2, "gzip")) {
                compression = COMPRESSION_GZIP;
            } else if (!strcmp(buf2, "zip")) {
                compression = COMPRESSION_ZIP;
            } else {
                log_messages.printf(
                    SCHED_MSG_LOG::CRITICAL,
                    "unrecognized compression type: %s", buf
                );
            }
            continue;
        }
        log_messages.printf(
            SCHED_MSG_LOG::CRITICAL,
            "OUTPUT::parse: unrecognized: %s", buf
        );
    }
    return ERR_XML_PARSE;
}

int ENUMERATION::parse(FILE* in) {
    char buf[256], buf2[256];
    int retval, i;

    table = -1;
    sort = SORT_NONE;
    strcpy(filename, "");
    while (fgets(buf, 256, in)) {
        if (match_tag(buf, "</enumeration>")) {
            if (table == -1) return ERR_XML_PARSE;
            if (sort == -1) return ERR_XML_PARSE;
            if (!strlen(filename)) return ERR_XML_PARSE;
            return 0;
        }
        if (match_tag(buf, "<output>")) {
            OUTPUT output;
            retval = output.parse(in);
            if (!retval) outputs.push_back(output);
        }
        if (parse_str(buf, "<filename>", filename, sizeof(filename))) {
            continue;
        }
        if (parse_str(buf, "<table>", buf2, sizeof(buf2))) {
            for (i=0; i<3; i++) {
                if (!strcmp(buf2, table_name[i])) {
                    table = i;
                    break;
                }
            }
        }
        if (parse_str(buf, "<sort>", buf2, sizeof(buf2))) {
            if (!strcmp(buf2, "id")) sort = SORT_ID;
            if (!strcmp(buf2, "total_credit")) sort = SORT_TOTAL_CREDIT;
            if (!strcmp(buf2, "expavg_credit")) sort = SORT_EXPAVG_CREDIT;
        }
    }
    return ERR_XML_PARSE;
}

int DUMP_SPEC::parse(FILE* in) {
    char buf[256];
    int retval;

    while (fgets(buf, 256, in)) {
        if (match_tag(buf, "</boinc_db_dump_spec>")) return 0;
        if (match_tag(buf, "<enumeration>")) {
            ENUMERATION e;
            retval = e.parse(in);
            if (!retval) enumerations.push_back(e);
        }
        if (parse_str(buf, "<output_dir", output_dir, sizeof(output_dir))) {
            continue;
        }
        if (parse_str(buf, "<final_output_dir", final_output_dir, sizeof(final_output_dir))) {
            continue;
        }
    }
    return ERR_XML_PARSE;
}

// class that automatically compresses on close
//
class ZFILE {
protected:
    string tag;     // enclosing XML tag
    char current_path[256];
    int compression;
public:
    FILE* f;
    ZFILE(string tag_, int comp): tag(tag_), compression(comp), f(0) {}
    ~ZFILE() { close(); }

    void open(const char* filename) {
        close();

        f = fopen(filename, "w");
        if (!f) {
            log_messages.printf(
                SCHED_MSG_LOG::CRITICAL,
                "Couldn't open %s for output\n", filename
            );
        }
        fprintf(f,
            "<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>\n<%s>\n", tag.c_str()
        );
        strcpy(current_path, filename);
    }

    void open_num(const char* filename, int filenum) {
        char buf[256];
        sprintf(buf, "%s_%d", filename, filenum);
        open(buf);
    }

    void close() {
        char buf[256];
        if (f) {
            fprintf(f, "</%s>\n", tag.c_str());
            fclose(f);
            switch(compression) {
            case COMPRESSION_ZIP:
                sprintf(buf, "zip -q %s", current_path);
                system(buf);
                break;
            case COMPRESSION_GZIP:
                sprintf(buf, "gzip -fq %s", current_path);
                system(buf);
                break;
            }
            f = 0;
        }
    }
};

// class that automatically opens a new file every N IDs
//
class NUMBERED_ZFILE : public ZFILE {
    const char* filename_base;
    int nids_per_file;
    int last_filenum;
public:
    NUMBERED_ZFILE(string tag_, int comp, const char* fb, int nids_per_file_)
        :   ZFILE(tag_, comp),
            filename_base(fb),
            nids_per_file(nids_per_file_),
            last_filenum(-1)
    {}

    void set_id(int);

};

void NUMBERED_ZFILE::set_id(int id) {
    int filenum = id/nids_per_file;
    if (!f || (filenum != last_filenum)) {
        open_num(filename_base, filenum);
        last_filenum = filenum;
    }
}
void write_host(HOST& host, FILE* f, bool detail) {
    int retval;

    fprintf(f,
        "<host>\n"
        "    <id>%d</id>\n",
        host.id
    );
    if (detail) {
        DB_USER user;
        retval = user.lookup_id(host.userid);
        if (retval) {
            log_messages.printf(SCHED_MSG_LOG::CRITICAL,  "user lookup: %d\n", retval);
            exit(1);
        }
        if (user.show_hosts) {
            fprintf(f,
                "    <userid>%d</userid>\n",
                host.userid
            );
        }
    }
    fprintf(f,
        "    <total_credit>%f</total_credit>\n"
        "    <expavg_credit>%f</expavg_credit>\n"
        "    <expavg_time>%f</expavg_time>\n"
        "    <p_vendor>%s</p_vendor>\n"
        "    <p_model>%s</p_model>\n"
        "    <os_name>%s</os_name>\n"
        "    <os_version>%s</os_version>\n",
        host.total_credit,
        host.expavg_credit,
        host.expavg_time,
        host.p_vendor,
        host.p_model,
        host.os_name,
        host.os_version
    );
    if (detail) {
        fprintf(f,
            "  <create_time>%d</create_time>\n"
            "  <rpc_time>%d</rpc_time>\n"
            "  <timezone>%d</timezone>\n"
            "  <ncpus>%d</ncpus>\n"
            "  <p_fpops>%f</p_fpops>\n"
            "  <p_iops>%f</p_iops>\n"
            "  <p_membw>%f</p_membw>\n"
            "  <m_nbytes>%f</m_nbytes>\n"
            "  <m_cache>%f</m_cache>\n"
            "  <m_swap>%f</m_swap>\n"
            "  <d_total>%f</d_total>\n"
            "  <d_free>%f</d_free>\n"
            "  <n_bwup>%f</n_bwup>\n"
            "  <n_bwdown>%f</n_bwdown>\n",
            host.create_time,
            host.rpc_time,
            host.timezone,
            host.p_ncpus,
            host.p_fpops,
            host.p_iops,
            host.p_membw,
            host.m_nbytes,
            host.m_cache,
            host.m_swap,
            host.d_total,
            host.d_free,
            host.n_bwup,
            host.n_bwdown
        );
    }
    fprintf(f,
        "</host>\n"
    );
}

void write_user(USER& user, FILE* f, bool detail) {
    char buf[1024];
    char cpid[MD5_LEN];

    string name, url;
    xml_escape(user.name, name);
    xml_escape(user.url, url);

    strcpy(buf, user.cross_project_id);
    strcat(buf, user.email_addr);
    md5_block((unsigned char*)buf, strlen(buf), cpid);

    fprintf(f,
        "<user>\n"
        " <id>%d</id>\n"
        " <name>%s</name>\n"
        " <country>%s</country>\n"
        " <create_time>%d</create_time>\n"
        " <total_credit>%f</total_credit>\n"
        " <expavg_credit>%f</expavg_credit>\n"
        " <expavg_time>%f</expavg_time>\n"
        " <cpid>%s</cpid>\n",
        user.id,
        name.c_str(),
        user.country,
        user.create_time,
        user.total_credit,
        user.expavg_credit,
        user.expavg_time,
        cpid
    );
    if (strlen(user.url)) {
        fprintf(f,
            " <url>%s</url>\n",
            url.c_str()
        );
    }
    if (user.teamid) {
        fprintf(f,
            " <teamid>%d</teamid>\n",
            user.teamid
        );
    }
    if (user.has_profile) {
        fprintf(f,
            " <has_profile/>\n"
        );
    }
#if 0
    if (detail && user.show_hosts) {
        DB_HOST host;
        sprintf(buf, "where userid=%d", user.id);
        while (!host.enumerate(buf)) {
            if (host.total_credit > 0) {
                write_host(host, f, false);
            }
        }
    }
#endif
    fprintf(f,
        "</user>\n"
    );
}

void write_team(TEAM& team, FILE* f, bool detail) {
    DB_USER user;
    char buf[256];
    string name;
    string url, name_html, description;

    xml_escape(team.name, name);

    fprintf(f,
        "<team>\n"
        " <id>%d</id>\n"
        " <name>%s</name>\n"
        " <userid>%d</userid>\n"
        " <total_credit>%f</total_credit>\n"
        " <expavg_credit>%f</expavg_credit>\n"
        " <expavg_time>%f</expavg_time>\n"
        " <nusers>%d</nusers>\n",
        team.id,
        name.c_str(),
        team.userid,
        team.total_credit,
        team.expavg_credit,
        team.expavg_time,
        team.nusers
    );

    fprintf(f,
        " <create_time>%d</create_time>\n",
        team.create_time
    );
    if (strlen(team.url)) {
        xml_escape(team.url, url);
        fprintf(f,
            " <url>%s</url>\n",
            url.c_str()
        );
    }
    if (strlen(team.name_html)) {
        xml_escape(team.name_html, name_html);
        fprintf(f,
            "<name_html>%s</name_html>\n",
            name_html.c_str()
        );
    }
    if (strlen(team.description)) {
        xml_escape(team.description, description);
        fprintf(f,
            "<description>%s</description>\n",
            description.c_str()
        );
    }
    fprintf(f,
        " <country>%s</country>\n",
        team.country
    );
    if (detail) {
        sprintf(buf, "where teamid=%d", team.id);
        while (!user.enumerate(buf)) {
            write_user(user, f, false);
        }
    }
    fprintf(f,
        "</team>\n"
    );
}

void core_versions(char* dir) {
    char buf[256];

    sprintf(buf, "%s/core_versions.xml", dir);
    ZFILE f("core_versions", false);
    f.open(buf);

    DB_PLATFORM platform;
    while (!platform.enumerate("order by name")) {
        DB_CORE_VERSION core_version;
        char query_buf[256];
        sprintf(query_buf, "where platformid=%d order by version_num desc", platform.id);
        if (!core_version.enumerate(query_buf)) {
            char url[256] = "";
            parse_str(core_version.xml_doc, "<url>", url, sizeof(url));

            fprintf(f.f,
                "   <core_version>\n"
                "      <id>%d</id>\n"
                "      <platform id=\"%d\" name=\"%s\">%s</platform>\n"
                "      <version>%d</version>\n"
                "      <create_time>%d</create_time>\n"
                "      <url>%s</url>\n"
                "   </core_version>\n",
                core_version.id,
                platform.id, platform.name, platform.user_friendly_name,
                core_version.version_num,
                core_version.create_time,
                url
            );
        }
    }
    f.close();
}

int print_app(FILE* f, APP& app) {

    fprintf(f, "        <application>\n");
    fprintf(f, "            <name>%s</name>\n", app.user_friendly_name);

#if 0
    DB_RESULT result;
    char buf[256];
    int n, retval;
    // can't do this stuff because MySQL/InnoDB can't do counts efficiently
    //
    sprintf(buf, "where appid=%d and server_state=%d", app.id, RESULT_SERVER_STATE_UNSENT);
    retval = result.count(n, buf);
    if (!retval) {
        fprintf(f, "            <results_unsent>%d</results_unsent>\n", n);
    }

    sprintf(buf, "where appid=%d and server_state=%d", app.id, RESULT_SERVER_STATE_IN_PROGRESS);
    retval = result.count(n, buf);
    if (!retval) {
        fprintf(f, "            <results_in_progress>%d</results_in_progress>\n", n);
    }

    sprintf(buf, "where appid=%d and server_state=%d", app.id, RESULT_SERVER_STATE_OVER);
    retval = result.count(n, buf);
    if (!retval) {
        fprintf(f, "            <results_over>%d</results_over>\n", n);
    }
#endif

    fprintf(f, "        </application>\n");
    return 0;
}

int print_apps(FILE* f) {
    DB_APP app;
    fprintf(f, "    <applications>\n");
    while (!app.enumerate()) {
        print_app(f, app);
    }
    fprintf(f, "    </applications>\n");
    return 0;
}

int tables_file(char* dir) {
    char buf[256];

    ZFILE f("tables", false);
    sprintf(buf, "%s/tables.xml", dir);
    f.open(buf);
    fprintf(f.f,
        "    <update_time>%d</update_time>\n",
        (int)time(0)
    );
#if 0
    DB_USER user;
    DB_TEAM team;
    DB_HOST host;
    int nusers, nteams, nhosts;
    int retval;
    // can't do counts in MySQL/InnoDB
    retval = user.count(nusers);
    if (retval) return retval;
    retval = team.count(nteams);
    if (retval) return retval;
    retval = host.count(nhosts);
    if (retval) return retval;
    fprintf(f.f,
        "    <nusers_total>%d</nusers_total>\n"
        "    <nteams_total>%d</nteams_total>\n"
        "    <nhosts_total>%d</nhosts_total>\n",
        nusers,
        nteams,
        nhosts
    );
#endif
    print_apps(f.f);
    f.close();
    return 0;
}

int ENUMERATION::make_it_happen(char* output_dir) {
    unsigned int i;
    int n;
    DB_USER user;
    DB_TEAM team;
    DB_HOST host;
    char clause[256];
    char path[256];

    sprintf(path, "%s/%s", output_dir, filename);

    for (i=0; i<outputs.size(); i++) {
        OUTPUT& out = outputs[i];
        if (out.recs_per_file) {
            out.nzfile = new NUMBERED_ZFILE(
                tag_name[table], out.compression, path, out.recs_per_file
            );
        } else {
            out.zfile = new ZFILE(tag_name[table], out.compression);
            out.zfile->open(path);
        }
    }
    switch(sort) {
    case SORT_NONE:
        strcpy(clause, "where total_credit > 0");
        break;
    case SORT_ID:
        strcpy(clause, "where total_credit > 0 order by id");
        break;
    case SORT_TOTAL_CREDIT:
        strcpy(clause, "where total_credit > 0 order by total_credit desc");
        break;
    case SORT_EXPAVG_CREDIT:
        strcpy(clause, "where total_credit > 0 order by expavg_credit desc");
        break;
    }
    switch(table) {
    case TABLE_USER:
        n = 0;
        while (!user.enumerate(clause, true)) {
            for (i=0; i<outputs.size(); i++) {
                OUTPUT& out = outputs[i];
                if (sort == SORT_ID && out.recs_per_file) {
                    out.nzfile->set_id(n++);
                }
                if (out.zfile) {
                    write_user(user, out.zfile->f, out.detail);
                } else {
                    write_user(user, out.nzfile->f, out.detail);
                }
            }
        }
        break;
    case TABLE_HOST:
        n = 0;
        while(!host.enumerate(clause)) {
            for (i=0; i<outputs.size(); i++) {
                OUTPUT& out = outputs[i];
                if (sort == SORT_ID && out.recs_per_file) {
                    out.nzfile->set_id(n++);
                }
                if (out.zfile) {
                    write_host(host, out.zfile->f, out.detail);
                } else {
                    write_host(host, out.nzfile->f, out.detail);
                }
            }
        }
        break;
    case TABLE_TEAM:
        n = 0;
        while(!team.enumerate(clause)) {
            for (i=0; i<outputs.size(); i++) {
                OUTPUT& out = outputs[i];
                if (sort == SORT_ID && out.recs_per_file) {
                    out.nzfile->set_id(n++);
                }
                if (out.zfile) {
                    write_team(team, out.zfile->f, out.detail);
                } else {
                    write_team(team, out.nzfile->f, out.detail);
                }
            }
        }
        break;
    }
    for (i=0; i<outputs.size(); i++) {
        OUTPUT& out = outputs[i];
        if (out.zfile) out.zfile->close();
        if (out.nzfile) out.nzfile->close();
    }
    return 0;
}

int main(int argc, char** argv) {
    SCHED_CONFIG config;
    int retval, i;
    DUMP_SPEC spec;
    char* db_host = 0;
    char spec_filename[256], buf[256];

    check_stop_daemons();
    setbuf(stderr, 0);

    log_messages.printf(SCHED_MSG_LOG::NORMAL, "db_dump starting\n");
    strcpy(spec_filename, "");
    for (i=1; i<argc; i++) {
        if (!strcmp(argv[i], "-dump_spec")) {
            strcpy(spec_filename, argv[++i]);
        } else if (!strcmp(argv[i], "-d")) {
            log_messages.set_debug_level(atoi(argv[++i]));
        } else if (!strcmp(argv[i], "-db_host")) {
            db_host = argv[++i];
        } else {
            log_messages.printf(SCHED_MSG_LOG::CRITICAL, "Usage: %s\n", argv[i]);
            exit(1);
        }
    }

    if (!strlen(spec_filename)) {
        log_messages.printf(SCHED_MSG_LOG::CRITICAL, "no spec file given\n");
        exit(1);
    }

    FILE* f = fopen(spec_filename, "r");
    if (!f) {
        log_messages.printf(SCHED_MSG_LOG::CRITICAL, "spec file missing\n");
        exit(1);
    }

    retval = spec.parse(f);
    if (retval) {
        log_messages.printf(SCHED_MSG_LOG::CRITICAL, "can't parse spec file\n");
        exit(1);
    }

    fclose(f);

    if (lock_file(LOCKFILE)) {
        log_messages.printf(SCHED_MSG_LOG::CRITICAL, "Another copy of db_dump is already running\n");
        exit(1);
    }
    log_messages.printf(SCHED_MSG_LOG::NORMAL, "Starting\n");

    retval = config.parse_file("..");
    if (retval) {
        log_messages.printf(SCHED_MSG_LOG::CRITICAL, "Can't parse config file\n");
        exit(1);
    }
    retval = boinc_db.open(
        config.db_name,
        db_host?db_host:config.db_host,
        config.db_user,
        config.db_passwd
    );
    if (retval) {
        log_messages.printf(SCHED_MSG_LOG::CRITICAL, "Can't open DB\n");
        exit(1);
    }

    mkdir(spec.output_dir, 0777);

    unsigned int j;
    for (j=0; j<spec.enumerations.size(); j++) {
        ENUMERATION& e = spec.enumerations[j];
        e.make_it_happen(spec.output_dir);
    }

    tables_file(spec.output_dir);
    core_versions(spec.output_dir);

    sprintf(buf, "cp %s %s/db_dump.xml", spec_filename, spec.output_dir);
    system(buf);
    sprintf(buf, "/bin/rm -rf %s; mv %s %s",
        spec.final_output_dir, spec.output_dir, spec.final_output_dir
    );
    system(buf);
    log_messages.printf(SCHED_MSG_LOG::NORMAL, "db_dump finished\n");
}