/**

 * $Id: config.c,v 1.1 2007-10-17 11:26:45 nkeynes Exp $

 *

 * 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/gstrfuncs.h>

#include "dream.h"

#include "config.h"

#include "maple/maple.h"

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", CONFIG_TYPE_FILE, "dcboot.rom" },

     { "flash", CONFIG_TYPE_FILE, "dcflash.rom" },

     { "default path", CONFIG_TYPE_PATH, "." },

     { "save path", CONFIG_TYPE_PATH, "save" },

     { "bootstrap", CONFIG_TYPE_FILE, "IP.BIN" },

     { NULL, CONFIG_TYPE_NONE }};

static struct lxdream_config_entry serial_config[] =

    {{ "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 },

     { NULL, CONFIG_TYPE_NONE }};

static gchar *lxdream_config_load_filename = NULL;

static gchar *lxdream_config_save_filename = NULL;

gboolean lxdream_find_config()

{

    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);

	}	

    } 

}

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( int key, const gchar *value )

{

    struct lxdream_config_entry *param = &global_config[key];

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

	free( param->value );

    }

    param->value = g_strdup(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 ) {

		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 );

			entry = dev->get_config(dev);

			while( entry->key != NULL ) {

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

			    entry++;

			}

		    }

		}

	    }

	}

	fprintf( f, "\n" );

	group++;

    }

    return TRUE;

}