/**

  * $Id$

  *

  * User configuration support

  *

  * Copyright (c) 2005 Nathan Keynes.

  *

  * This program is free software; you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation; either version 2 of the License, or

  * (at your option) any later version.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  */

 #include <unistd.h>

 #include <stdio.h>

 #include <errno.h>

 #include <stdlib.h>

 #include <string.h>

 #include <glib/gmem.h>

 #include <glib/gstrfuncs.h>

 #include "dream.h"

 #include "config.h"

 #include "maple/maple.h"

 extern struct lxdream_config_entry alsa_config[];

 gboolean lxdream_load_config_file( const gchar *filename );

 gboolean lxdream_save_config_file( const gchar *filename );

 gboolean lxdream_load_config_stream( FILE *f );

 gboolean lxdream_save_config_stream( FILE *f );

 static struct lxdream_config_entry global_config[] =

        {{ "bios", N_("Bios ROM"), CONFIG_TYPE_FILE, "dcboot.rom" },

         { "flash", N_("Flash ROM"), CONFIG_TYPE_FILE, "dcflash.rom" },

         { "default path", N_("Default disc path"), CONFIG_TYPE_PATH, "." },

         { "save path", N_("Save-state path"), CONFIG_TYPE_PATH, "save" },

         { "bootstrap", N_("Bootstrap IP.BIN"), CONFIG_TYPE_FILE, "IP.BIN" },

         { "gdrom", NULL, CONFIG_TYPE_FILE, NULL },

         { "recent", NULL, CONFIG_TYPE_FILE, NULL },

         { NULL, CONFIG_TYPE_NONE }};

 static struct lxdream_config_entry serial_config[] =

        {{ "device", N_("Serial device"), CONFIG_TYPE_FILE, "/dev/ttyS1" },

         { NULL, CONFIG_TYPE_NONE }};

 struct lxdream_config_group lxdream_config_root[] = 

        {{ "global", global_config },

         { "controllers", NULL },

         { "serial", serial_config },

 #ifdef HAVE_ALSA

         { "alsa", alsa_config },

 #endif

         { NULL, CONFIG_TYPE_NONE }};

 static gchar *lxdream_config_load_filename = NULL;

 static gchar *lxdream_config_save_filename = NULL;

 gboolean lxdream_find_config()

 {

     gboolean result = TRUE;

     char *home = getenv("HOME");

     if( lxdream_config_save_filename == NULL ) {

         lxdream_config_save_filename = g_strdup_printf("%s/.%s", home, DEFAULT_CONFIG_FILENAME);

     }

     if( lxdream_config_load_filename == NULL ) {

         if( access(lxdream_config_save_filename, R_OK) == 0 ) {

             lxdream_config_load_filename = g_strdup(lxdream_config_save_filename);

         } else if( access( PACKAGE_CONF_DIR "/" DEFAULT_CONFIG_FILENAME, R_OK ) == 0 ) {

             lxdream_config_load_filename = g_strdup(PACKAGE_CONF_DIR "/" DEFAULT_CONFIG_FILENAME);

         } else if( access( "./" DEFAULT_CONFIG_FILENAME, R_OK ) == 0 ) {

             lxdream_config_load_filename = g_strdup("./" DEFAULT_CONFIG_FILENAME);

         } else {

             lxdream_config_load_filename = g_strdup(lxdream_config_save_filename);

             result = FALSE;

         }	

     }

     return result;

 }

 void lxdream_set_config_filename( const gchar *filename )

 {

     if( lxdream_config_load_filename != NULL ) {

         g_free(lxdream_config_load_filename);

     }

     lxdream_config_load_filename = g_strdup(filename);

     if( lxdream_config_save_filename != NULL ) {

         g_free(lxdream_config_save_filename);

     }

     lxdream_config_save_filename = g_strdup(filename);

 }

 void lxdream_set_default_config( )

 {

     struct lxdream_config_group *group = lxdream_config_root;

     while( group->key != NULL ) {

         struct lxdream_config_entry *param = group->params;

         if( param != NULL ) {

             while( param->key != NULL ) {

                 if( param->value != param->default_value ) {

                     if( param->value != NULL )

                         free( param->value );

                     param->value = (gchar *)param->default_value;

                 }

                 param++;

             }

         }

         group++;

     }

     maple_detach_all();

 }

 const gchar *lxdream_get_config_value( int key )

 {

     return global_config[key].value;

 }

 void lxdream_set_config_value( lxdream_config_entry_t param, const gchar *value )

 {

     if( param->value != value ) {

         if( param->value != param->default_value && param->value != NULL ) {

             free( param->value );

         }

         param->value = g_strdup(value);

     }

 }

 void lxdream_set_global_config_value( int key, const gchar *value )

 {

     lxdream_set_config_value(&global_config[key], value);

 }

 const struct lxdream_config_entry * lxdream_get_config_entry( int key )

 {

     return &global_config[key];

 }

 gboolean lxdream_set_group_value( lxdream_config_group_t group, const gchar *key, const gchar *value )

 {

     int i;

     for( i=0; group->params[i].key != NULL; i++ ) {

         if( strcasecmp( group->params[i].key, key ) == 0 ) {

             lxdream_set_config_value( &group->params[i], value );

             return TRUE;

         }

     }

     return FALSE;

 }

 void lxdream_copy_config_list( lxdream_config_entry_t dest, lxdream_config_entry_t src )

 {

     int i;

     for( i=0; src[i].key != NULL; i++ ) {

         lxdream_set_config_value( &dest[i], src[i].value );

     }

 }

 gboolean lxdream_load_config( )

 {

     if( lxdream_config_load_filename == NULL ) {

         lxdream_find_config();

     }

     return lxdream_load_config_file(lxdream_config_load_filename);

 }

 gboolean lxdream_save_config( )

 {

     if( lxdream_config_save_filename == NULL ) {

         lxdream_find_config();

     }

     return lxdream_save_config_file(lxdream_config_save_filename);

 }

 gboolean lxdream_load_config_file( const gchar *filename )

 {

     FILE *f;

     gboolean result;

     if( access(filename, F_OK) != 0 ) {

         INFO( "Configuration file '%s' does not exist, creating from defaults" );

         lxdream_set_default_config();

         lxdream_save_config();

     }

     f = fopen(filename, "ro");

     if( f == NULL ) {

         ERROR( "Unable to open configuration file '%s': %s", filename, strerror(errno) );

         lxdream_set_default_config();

         return FALSE;

     }

     result = lxdream_load_config_stream( f );

     fclose(f);

     return result;

 }

 gboolean lxdream_load_config_stream( FILE *f )

 {

     char buf[512];

     int maple_device = -1, maple_subdevice = -1;

     struct lxdream_config_group devgroup;

     struct lxdream_config_group *group = NULL;

     maple_device_t device = NULL;

     lxdream_set_default_config();

     while( fgets( buf, sizeof(buf), f ) != NULL ) {

         g_strstrip(buf);

         if( buf[0] == '#' )

             continue;

         if( *buf == '[' ) {

             char *p = strchr(buf, ']');

             if( p != NULL ) {

                 struct lxdream_config_group *tmp_group;

                 maple_device = maple_subdevice = -1;

                 *p = '\0';

                 g_strstrip(buf+1);

                 tmp_group = &lxdream_config_root[0];

                 while( tmp_group->key != NULL ) {

                     if( strcasecmp(tmp_group->key, buf+1) == 0 ) {

                         group = tmp_group;

                         break;

                     }

                     tmp_group++;

                 }

             }

         } else if( group != NULL ) {

             char *value = strchr( buf, '=' );

             if( value != NULL ) {

                 struct lxdream_config_entry *param = group->params;

                 *value = '\0';

                 value++;

                 g_strstrip(buf);

                 g_strstrip(value);

                 if( strcmp(group->key,"controllers") == 0  ) {

                     if( g_strncasecmp( buf, "device ", 7 ) == 0 ) {

                         maple_device = strtoul( buf+7, NULL, 0 );

                         if( maple_device < 0 || maple_device > 3 ) {

                             ERROR( "Device number must be between 0..3 (not '%s')", buf+7);

                             continue;

                         }

                         maple_subdevice = 0;

                         device = maple_new_device( value );

                         if( device == NULL ) {

                             ERROR( "Unrecognized device '%s'", value );

                         } else {

                             devgroup.key = "controllers";

                             devgroup.params = maple_get_device_config(device);

                             maple_attach_device( device, maple_device, maple_subdevice );

                             group = &devgroup;

                         }

                         continue;

                     } else if( g_strncasecmp( buf, "subdevice ", 10 ) == 0 ) {

                         maple_subdevice = strtoul( buf+10, NULL, 0 );

                         if( maple_device == -1 ) {

                             ERROR( "Subdevice not allowed without primary device" );

                         } else if( maple_subdevice < 1 || maple_subdevice > 5 ) {

                             ERROR( "Subdevice must be between 1..5 (not '%s')", buf+10 );

                         } else if( (device = maple_new_device(value)) == NULL ) {

                             ERROR( "Unrecognized subdevice '%s'", value );

                         } else {

                             devgroup.key = "controllers";

                             devgroup.params = maple_get_device_config(device);

                             maple_attach_device( device, maple_device, maple_subdevice );

                             group = &devgroup;

                         }

                         continue;

                     }

                 }

                 while( param->key != NULL ) {

                     if( strcasecmp( param->key, buf ) == 0 ) {

                         param->value = g_strdup(value);

                         break;

                     }

                     param++;

                 }

             }

         }

     }

     return TRUE;

 }

 gboolean lxdream_save_config_file( const gchar *filename )

 {

     FILE *f = fopen(filename, "wo");

     gboolean result;

     if( f == NULL ) {

         ERROR( "Unable to open '%s': %s", filename, strerror(errno) );

         return FALSE;

     }

     result = lxdream_save_config_stream(f);

     fclose(f);

     return TRUE;

 }    

 gboolean lxdream_save_config_stream( FILE *f )

 {

     struct lxdream_config_group *group = &lxdream_config_root[0];

     while( group->key != NULL ) {

         struct lxdream_config_entry *entry = group->params;

         fprintf( f, "[%s]\n", group->key );

         if( entry != NULL ) {

             while( entry->key != NULL ) {

                 if( entry->value != NULL ) {

                     fprintf( f, "%s = %s\n", entry->key, entry->value );

                 }

                 entry++;

             }

         } else if( strcmp(group->key, "controllers") == 0 ) {

             int i,j;

             for( i=0; i<4; i++ ) {

                 for( j=0; j<6; j++ ) {

                     maple_device_t dev = maple_get_device( i, j );

                     if( dev != NULL ) {

                         if( j == 0 )

                             fprintf( f, "Device %d = %s\n", i, dev->device_class->name );

                         else 

                             fprintf( f, "Subdevice %d = %s\n", j, dev->device_class->name );

                         if( dev->get_config != NULL && ((entry = dev->get_config(dev)) != NULL) ) {

                             while( entry->key != NULL ) {

                                 if( entry->value != NULL ) {

                                     fprintf( f, "%*c%s = %s\n", j==0?4:8, ' ',entry->key, entry->value );

                                 }

                                 entry++;

                             }

                         }

                     }

                 }

             }

         }

         fprintf( f, "\n" );

         group++;

     }

     return TRUE;

 }