#include "media.h"

// Submodules
#include "json/layout.h"
#include "util/format.h"

// Model
#include "model/server.h"

// Standard Library
#include <stdlib.h>
#include <assert.h>
#include <string.h>

#define OBJ_TYPE struct media
struct json_object_field media_layout[] = {
	JSON_FIELD_STRING( content_type, false ),
	JSON_FIELD_STRING( preview_url, false ),
	JSON_FIELD_STRING( remote_url, false ),
	JSON_FIELD_END,
};
#undef OBJ_TYPE

struct media* media_new()
{
	struct media* res;
	res = malloc(sizeof(*res));
	memset(res,0,sizeof(*res));
	return res;
}

struct media* media_from_id( int id )
{
	if( id == 0 ) { return NULL; }
	char filename[512];
	FILE* f = fopen( format( filename, sizeof(filename), "data/media/%d.json", id ), "r" );
	if( !f ) { return NULL; }

	struct media* m;
	m = malloc(sizeof(*m));
	memset(m,0,sizeof(*m));
	m->id = id;

	if( !json_read_object_layout_from_FILE( f, media_layout, m ) ) {
		media_free(m);
		return NULL;
	}

	return m;
}
struct media* media_from_local_uri( const char* uri )
{
	if( 0 != strncmp( "https://", uri, 8 ) ) { return NULL; }
	uri += 8;

	int server_name_length = strlen(g_server->domain);
	if( 0 != strncmp( g_server->domain, uri, server_name_length ) ) { return NULL; }
	uri += server_name_length;

	if( 0 != strncmp( "/media/", uri, 7 ) ) { return NULL; }
	uri += 7;

	// Note: zero is never a valid status id
	int id = atoi(uri);
	if( id == 0 ) { return NULL; }

	struct media* result = media_from_id(id);
	result->remote_url = strdup(uri);
	return result;
}
void media_free( struct media* m )
{
	if( !m ) { return; }

	free(m->content_type);
	free(m);
}
void media_save( struct media* m )
{
	assert( m );
	assert( m->id );

	char filename[512];
	json_write_object_layout_to_file( format(filename,sizeof(filename),"data/media/%d.json", m->id ), "\t", media_layout, m );
}

JSON_FIELD_TYPE_OBJECT_LAYOUT_WITH_DEFAULTS( media );