#include "config.h"
#include "main.h"
#include <string.h>
#include <time.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h> /* atexit() */

#if INTERFACE
#ifdef FOSSIL_ENABLE_JSON
#  include "cson_amalgamation.h" /* JSON API. Needed inside the INTERFACE block! */
#  include "json_detail.h"
#endif
#ifdef FOSSIL_ENABLE_TCL
#include "tcl.h"
#endif

/*
** Number of elements in an array
*/
#define count(X)  (sizeof(X)/sizeof(X[0]))

/*

  char WrTkt;            /* w: make changes to tickets via web */
  char Attach;           /* b: add attachments */
  char TktFmt;           /* t: create new ticket report formats */
  char RdAddr;           /* e: read email addresses or other private data */
  char Zip;              /* z: download zipped artifact via /zip URL */
  char Private;          /* x: can send and receive private content */
};

#ifdef FOSSIL_ENABLE_TCL
/*
** All Tcl related context information is in this structure.  This structure
** definition has been copied from and should be kept in sync with the one in
** "th_tcl.c".
*/
struct TclContext {
  int argc;
  char **argv;
  Tcl_Interp *interp;
};
#endif

/*
** All global variables are in this structure.
*/
struct Global {
  int argc; char **argv;  /* Command-line arguments to the program */
  int isConst;            /* True if the output is unchanging */

  FILE *httpIn;           /* Accept HTTP input from here */
  FILE *httpOut;          /* Send HTTP output here */
  int xlinkClusterOnly;   /* Set when cloning.  Only process clusters */
  int fTimeFormat;        /* 1 for UTC.  2 for localtime.  0 not yet selected */
  int *aCommitFile;       /* Array of files to be committed */
  int markPrivate;        /* All new artifacts are private if true */
  int clockSkewSeen;      /* True if clocks on client and server out of sync */
  int isHTTP;             /* True if running in server/CGI modes, else assume CLI. */

  int urlIsFile;          /* True if a "file:" url */
  int urlIsHttps;         /* True if a "https:" url */
  int urlIsSsh;           /* True if an "ssh:" url */
  char *urlName;          /* Hostname for http: or filename for file: */
  char *urlHostname;      /* The HOST: parameter on http headers */
  char *urlProtocol;      /* "http" or "https" */
  int urlPort;            /* TCP port number for http: or https: */
  int urlDfltPort;        /* The default port for the given protocol */
  char *urlPath;          /* Pathname for http: */
  char *urlUser;          /* User id for http: */
  char *urlPasswd;        /* Password for http: */
  char *urlCanonical;     /* Canonical representation of the URL */
  char *urlProxyAuth;     /* Proxy-Authorizer: string */
  char *urlFossil;        /* The path of the ?fossil=path suffix on ssh: */
  int dontKeepUrl;        /* Do not persist the URL */
  
  const char *zLogin;     /* Login name.  "" if not logged in. */
  const char *zSSLIdentity;  /* Value of --ssl-identity option, filename of SSL client identity */
  int useLocalauth;       /* No login required if from 127.0.0.1 */
  int noPswd;             /* Logged in without password (on 127.0.0.1) */
  int userUid;            /* Integer user id */

  /* Information used to populate the RCVFROM table */
  int rcvid;              /* The rcvid.  0 if not yet defined. */
  char *zIpAddr;          /* The remote IP address */
  char *zNonce;           /* The nonce used for login */
  
  /* permissions used by the server */
  struct FossilUserPerms perm;

#ifdef FOSSIL_ENABLE_TCL
  /* all Tcl related context necessary for integration */
  struct TclContext tcl;
#endif

  /* For defense against Cross-site Request Forgery attacks */
  char zCsrfToken[12];    /* Value of the anti-CSRF token */
  int okCsrf;             /* Anti-CSRF token is present and valid */

  int parseCnt[10];       /* Counts of artifacts parsed */
  FILE *fDebug;           /* Write debug information here, if the file exists */

  const char *azAuxName[MX_AUX]; /* Name of each aux() or option() value */
  char *azAuxParam[MX_AUX];      /* Param of each aux() or option() value */
  const char *azAuxVal[MX_AUX];  /* Value of each aux() or option() value */
  const char **azAuxOpt[MX_AUX]; /* Options of each option() value */
  int anAuxCols[MX_AUX];         /* Number of columns for option() values */
  
  int allowSymlinks;             /* Cached "allow-symlinks" option */

#ifdef FOSSIL_ENABLE_JSON
  struct FossilJsonBits {
    int isJsonMode;            /* True if running in JSON mode, else
                                  false. This changes how errors are
                                  reported. In JSON mode we try to
                                  always output JSON-form error
                                  responses and always exit() with
                                  code 0 to avoid an HTTP 500 error.
                               */
    int resultCode;            /* used for passing back specific codes from /json callbacks. */
    int errorDetailParanoia;   /* 0=full error codes, 1=%10, 2=%100, 3=%1000 */
    cson_output_opt outOpt;    /* formatting options for JSON mode. */
    cson_value * authToken;    /* authentication token */
    char const * jsonp;        /* Name of JSONP function wrapper. */
    unsigned char dispatchDepth /* Tells JSON command dispatching
                                   which argument we are currently
                                   working on. For this purpose, arg#0
                                   is the "json" path/CLI arg.
                                */;
    struct {                   /* "garbage collector" */
      cson_value * v;
      cson_array * a;
    } gc;
    struct {                   /* JSON POST data. */
      cson_value * v;
      cson_array * a;
      int offset;              /* Tells us which PATH_INFO/CLI args
                                  part holds the "json" command, so
                                  that we can account for sub-repos
                                  and path prefixes.  This is handled
                                  differently for CLI and CGI modes.
                               */
      char const * commandStr  /*"command" request param.*/;
    } cmd;
    struct {                   /* JSON POST data. */
      cson_value * v;
      cson_object * o;
    } post;
    struct {                   /* GET/COOKIE params in JSON mode.
                                  FIXME (stephan): verify that this is
                                  still used and remove if it is not.
                               */
      cson_value * v;
      cson_object * o;
    } param;
    struct {
      cson_value * v;
      cson_object * o;
    } reqPayload;              /* request payload object (if any) */
    struct {                   /* response warnings */
      cson_value * v;
      cson_array * a;
    } warnings;
  } json;
#endif /* FOSSIL_ENABLE_JSON */
};

/*
** Macro for debugging:
*/
#define CGIDEBUG(X)  if( g.fDebug ) cgi_debug X

  }
  if( cnt==1 ){
    *pIndex = m;
    return 0;
  }
  return 1+(cnt>1);
}

/*
** atexit() handler which frees up "some" of the resources
** used by fossil.
*/
void fossil_atexit(void) {
#ifdef FOSSIL_ENABLE_JSON
  cson_value_free(g.json.gc.v);
  memset(&g.json, 0, sizeof(g.json));
#endif
  free(g.zErrMsg);
  if(g.db){
    db_close(0);
  }
}

/*
** Search g.argv for arguments "--args FILENAME".  If found, then
** (1) remove the two arguments from g.argv
** (2) Read the file FILENAME
** (3) Use the contents of FILE to replace the two removed arguments:
**     (a) Ignore blank lines in the file

** This procedure runs first.
*/
int main(int argc, char **argv){
  const char *zCmdName = "unknown";
  int idx;
  int rc;
  int i;

#ifdef FOSSIL_ENABLE_TCL
  g.tcl.argc = argc;
  g.tcl.argv = argv;
  g.tcl.interp = 0;
#endif

  sqlite3_config(SQLITE_CONFIG_LOG, fossil_sqlite_log, 0);
  memset(&g, 0, sizeof(g));
  g.now = time(0);
  g.argc = argc;
  g.argv = argv;
#ifdef FOSSIL_ENABLE_JSON
#if defined(NDEBUG)
  g.json.errorDetailParanoia = 2 /* FIXME: make configurable
                                    One problem we have here is that this
                                    code is needed before the db is opened,
                                    so we can't sql for it.*/;
#else
  g.json.errorDetailParanoia = 0;
#endif
  g.json.outOpt = cson_output_opt_empty;
  g.json.outOpt.addNewline = 1;
  g.json.outOpt.indentation = 1 /* in CGI/server mode this can be configured */;
#endif /* FOSSIL_ENABLE_JSON */
  expand_args_option();
  argc = g.argc;
  argv = g.argv;
  for(i=0; i<argc; i++) g.argv[i] = fossil_mbcs_to_utf8(argv[i]);
  if( getenv("GATEWAY_INTERFACE")!=0 && !find_option("nocgi", 0, 0)){
    zCmdName = "cgi";
    g.isHTTP = 1;
  }else if( argc<2 ){
    fossil_print(
       "Usage: %s COMMAND ...\n"
       "   or: %s help           -- for a list of common commands\n"
       "   or: %s help COMMMAND  -- for help with the named command\n"
       "   or: %s commands       -- for a list of all commands\n",
       argv[0], argv[0], argv[0], argv[0]);
    fossil_exit(1);
  }else{
    g.isHTTP = 0;
    g.fQuiet = find_option("quiet", 0, 0)!=0;
    g.fSqlTrace = find_option("sqltrace", 0, 0)!=0;
    g.fSqlStats = find_option("sqlstats", 0, 0)!=0;
    g.fSystemTrace = find_option("systemtrace", 0, 0)!=0;
    if( g.fSqlTrace ) g.fSqlStats = 1;
    g.fSqlPrint = find_option("sqlprint", 0, 0)!=0;
    g.fHttpTrace = find_option("httptrace", 0, 0)!=0;

    blob_zero(&couldbe);
    n = strlen(zCmdName);
    for(i=0; i<count(aCommand); i++){
      if( memcmp(zCmdName, aCommand[i].zName, n)==0 ){
        blob_appendf(&couldbe, " %s", aCommand[i].zName);
      }
    }
    fossil_print("%s: ambiguous command prefix: %s\n"
                 "%s: could be any of:%s\n"
                 "%s: use \"help\" for more information\n",
                 argv[0], zCmdName, argv[0], blob_str(&couldbe), argv[0]);
    fossil_exit(1);
  }
  atexit( fossil_atexit );
  aCommand[idx].xFunc();
  fossil_exit(0);
  /*NOT_REACHED*/
  return 0;
}

/*

/*
** Print an error message, rollback all databases, and quit.  These
** routines never return.
*/
NORETURN void fossil_panic(const char *zFormat, ...){
  char *z;
  va_list ap;
  int rc = 1;
  static int once = 1;
  mainInFatalError = 1;
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);
#ifdef FOSSIL_ENABLE_JSON
  if( g.json.isJsonMode ){
    json_err( 0, z, 1 );
    if( g.isHTTP ){
      rc = 0 /* avoid HTTP 500 */;
    }
  }
  else
#endif
  {
    if( g.cgiOutput && once ){
      once = 0;
      cgi_printf("<p class=\"generalError\">%h</p>", z);
      cgi_reply();
    }else{
      char *zOut = mprintf("%s: %s\n", fossil_nameofexe(), z);
      fossil_puts(zOut, 1);
    }
  }
  free(z);
  db_force_rollback();
  fossil_exit(rc);
}

NORETURN void fossil_fatal(const char *zFormat, ...){
  char *z;
  int rc = 1;
  va_list ap;
  mainInFatalError = 1;
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);
#ifdef FOSSIL_ENABLE_JSON
  if( g.json.isJsonMode ){
    json_err( g.json.resultCode, z, 1 );
    if( g.isHTTP ){
      rc = 0 /* avoid HTTP 500 */;
    }
  }
  else
#endif
  {
    if( g.cgiOutput ){
      g.cgiOutput = 0;
      cgi_printf("<p class=\"generalError\">%h</p>", z);
      cgi_reply();
    }else{
      char *zOut = mprintf("\r%s: %s\n", fossil_nameofexe(), z);
      fossil_puts(zOut, 1);
    }
  }
  free(z);
  db_force_rollback();
  fossil_exit(rc);
}

/* This routine works like fossil_fatal() except that if called
** recursively, the recursive call is a no-op.
**
** Use this in places where an error might occur while doing
** fatal error shutdown processing.  Unlike fossil_panic() and
** fossil_fatal() which never return, this routine might return if
** the fatal error handing is already in process.  The caller must
** be prepared for this routine to return.
*/
void fossil_fatal_recursive(const char *zFormat, ...){
  char *z;
  va_list ap;
  int rc = 1;
  if( mainInFatalError ) return;
  mainInFatalError = 1;
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);
#ifdef FOSSIL_ENABLE_JSON
  if( g.json.isJsonMode ){
    json_err( g.json.resultCode, z, 1 );
    if( g.isHTTP ){
      rc = 0 /* avoid HTTP 500 */;
    }
  } else
#endif
  {
    if( g.cgiOutput ){
      g.cgiOutput = 0;
      cgi_printf("<p class=\"generalError\">%h</p>", z);
      cgi_reply();
    }else{
      char *zOut = mprintf("\r%s: %s\n", fossil_nameofexe(), z);
      fossil_puts(zOut, 1);
      free(zOut);
    }
  }
  db_force_rollback();
  fossil_exit(rc);
}


/* Print a warning message */
void fossil_warning(const char *zFormat, ...){
  char *z;
  va_list ap;
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);
#ifdef FOSSIL_ENABLE_JSON
  if(g.json.isJsonMode){
    json_warn( FSL_JSON_W_UNKNOWN, z );
  }else
#endif
  {
    if( g.cgiOutput ){
      cgi_printf("<p class=\"generalError\">%h</p>", z);
    }else{
      char *zOut = mprintf("\r%s: %s\n", fossil_nameofexe(), z);
      fossil_puts(zOut, 1);
      free(zOut);
    }
  }
  free(z);
}

/*
** Malloc and free routines that cannot fail
*/
void *fossil_malloc(size_t n){
  void *p = malloc(n==0 ? 1 : n);

    fossil_print("\n");
  }
}

/*
** List of commands starting with zPrefix, or all commands if zPrefix is NULL.
*/
static void command_list(const char *zPrefix, int cmdMask){
  int i, nCmd;
  int nPrefix = zPrefix ? strlen(zPrefix) : 0;
  const char *aCmd[count(aCommand)];
  for(i=nCmd=0; i<count(aCommand); i++){
    const char *z = aCommand[i].zName;
    if( (aCommand[i].cmdFlags & cmdMask)==0 ) continue;
    if( zPrefix && memcmp(zPrefix, z, nPrefix)!=0 ) continue;
    aCmd[nCmd++] = aCommand[i].zName;
  }
  multi_column_list(aCmd, nCmd);
}



















/*
** COMMAND: test-list-webpage
**
** List all web pages
*/
void cmd_test_webpage_list(void){
  int i, nCmd;
  const char *aCmd[count(aWebpage)];
  for(i=nCmd=0; i<count(aWebpage); i++){
    aCmd[nCmd++] = aWebpage[i].zName;
  }
  multi_column_list(aCmd, nCmd);
}


/*
** COMMAND: version
**
** Usage: %fossil version
**
** Print the source code version number for the fossil executable.
*/
void version_cmd(void){
  fossil_print("This is fossil version " RELEASE_VERSION " "
                MANIFEST_VERSION " " MANIFEST_DATE " UTC\n");
}


/*
** COMMAND: help
**
** Usage: %fossil help COMMAND
**    or: %fossil COMMAND -help
**
** Display information on how to use COMMAND.  To display a list of
** available commands one of:
**
**    %fossil help              Show common commands
**    %fossil help --all        Show both command and auxiliary commands
**    %fossil help --test       Show test commands only
**    %fossil help --aux        Show auxiliary commands only
*/
void help_cmd(void){
  int rc, idx;
  const char *z;
  if( g.argc<3 ){

    z = fossil_nameofexe();
    fossil_print(
      "Usage: %s help COMMAND\n"
      "Common COMMANDs:  (use \"%s help --all\" for a complete list)\n",
      z, z);
    command_list(0, CMDFLAG_1ST_TIER);
    version_cmd();
    return;
  }
  if( find_option("all",0,0) ){
    command_list(0, CMDFLAG_1ST_TIER | CMDFLAG_2ND_TIER);
    return;
  }
  if( find_option("aux",0,0) ){
    command_list(0, CMDFLAG_2ND_TIER);
    return;
  }
  if( find_option("test",0,0) ){
    command_list(0, CMDFLAG_TEST);
    return;
  }
  rc = name_search(g.argv[2], aCommand, count(aCommand), &idx);
  if( rc==1 ){
    fossil_print("unknown command: %s\nAvailable commands:\n", g.argv[2]);
    command_list(0, 0xff);
    fossil_exit(1);
  }else if( rc==2 ){
    fossil_print("ambiguous command prefix: %s\nMatching commands:\n",
                 g.argv[2]);
    command_list(g.argv[2], 0xff);
    fossil_exit(1);
  }
  z = aCmdHelp[idx];
  if( z==0 ){
    fossil_fatal("no help available for the %s command",
       aCommand[idx].zName);
  }

        zRepo[j] = '.';
      }

      if( szFile<1024 ){
        if( zNotFound ){
          cgi_redirect(zNotFound);
        }else{
#ifdef FOSSIL_ENABLE_JSON
          if(g.json.isJsonMode){
            json_err(FSL_JSON_E_RESOURCE_NOT_FOUND,NULL,1);
            return;
          }
#endif
          @ <h1>Not Found</h1>
          cgi_set_status(404, "not found");
          cgi_reply();
        }
        return;
      }
      break;

  */
  if( g.zContentType && memcmp(g.zContentType, "application/x-fossil", 20)==0 ){
    zPathInfo = "/xfer";
  }
  set_base_url();
  if( zPathInfo==0 || zPathInfo[0]==0 
      || (zPathInfo[0]=='/' && zPathInfo[1]==0) ){
#ifdef FOSSIL_ENABLE_JSON
    if(g.json.isJsonMode){
      json_err(FSL_JSON_E_RESOURCE_NOT_FOUND,NULL,1);
      fossil_exit(0);
    }
#endif
    fossil_redirect_home() /*does not return*/;
  }else{
    zPath = mprintf("%s", zPathInfo);
  }

  /* Make g.zPath point to the first element of the path.  Make
  ** g.zExtra point to everything past that point.
  */

      g.zExtra = 0;
    }
    break;
  }
  if( g.zExtra ){
    /* CGI parameters get this treatment elsewhere, but places like getfile
    ** will use g.zExtra directly.
    ** Reminder: the login mechanism uses 'name' differently, and may
    ** eventually have a problem/collision with this.
    */
    dehttpize(g.zExtra);
    cgi_set_parameter_nocopy("name", g.zExtra);
  }

  /* Locate the method specified by the path and execute the function
  ** that implements that method.
  */
  if( name_search(g.zPath, aWebpage, count(aWebpage), &idx) &&
      name_search("not_found", aWebpage, count(aWebpage), &idx) ){
#ifdef FOSSIL_ENABLE_JSON
    if(g.json.isJsonMode){
      json_err(FSL_JSON_E_RESOURCE_NOT_FOUND,NULL,0);
    }else
#endif
    {
      cgi_set_status(404,"Not Found");
      @ <h1>Not Found</h1>
      @ <p>Page not found: %h(g.zPath)</p>
    }
  }else if( aWebpage[idx].xFunc!=page_xfer && db_schema_is_outofdate() ){
#ifdef FOSSIL_ENABLE_JSON
    if(g.json.isJsonMode){
      json_err(FSL_JSON_E_DB_NEEDS_REBUILD,NULL,0);
    }else
#endif
    {
      @ <h1>Server Configuration Error</h1>
      @ <p>The database schema on the server is out-of-date.  Please ask
      @ the administrator to run <b>fossil rebuild</b>.</p>
    }
  }else{
    aWebpage[idx].xFunc();
  }

  /* Return the result.
  */
  cgi_reply();
}

/*
** COMMAND: cgi*
**
** Usage: %fossil ?cgi? SCRIPT
**
** The SCRIPT argument is the name of a file that is the CGI script
** that is being run.  The command name, "cgi", may be omitted if
** the GATEWAY_INTERFACE environment variable is set to "CGI" (which
** should always be the case for CGI scripts run by a webserver.)  The

/*
** undocumented format:
**
**        fossil http REPOSITORY INFILE OUTFILE IPADDR
**
** The argv==6 form is used by the win32 server only.
**
** COMMAND: http*
**
** Usage: %fossil http REPOSITORY [--notfound URL] [--host HOSTNAME] [--https]
**
** Handle a single HTTP request appearing on stdin.  The resulting webpage
** is delivered on stdout.  This method is used to launch an HTTP request
** handler from inetd, for example.  The argument is the name of the 
** repository.

  }
  return 0;
}
#endif
#endif

/*
** COMMAND: server*
** COMMAND: ui
**
** Usage: %fossil server ?-P|--port TCPPORT? -?-R|--root ROOT? ?REPOSITORY?
**    Or: %fossil ui ?-P|--port TCPPORT? -?-R|--root ROOT? ?REPOSITORY?
**
** Open a socket and begin listening and responding to HTTP requests on
** TCP port 8080, or on any other TCP port defined by the -P or