#include <assert.h>
#include <stdlib.h>

#include "file_io.h"
#include "log.h"
#include "string_utils.h"

static char* base_assets_path;

void io_file_init(const char* assets_path)
{
	base_assets_path = str_new(assets_path);
}

void io_file_cleanup(void)
{
	if(base_assets_path) free(base_assets_path);
}

char* io_file_read(const char* path)
{
	/* Make path relative to base assets folder path */
	char* relative_path = str_new(base_assets_path);
	relative_path = str_concat(relative_path, path);
	
	FILE* file = fopen(relative_path, "r");
	char* data = NULL;
	if(file)
	{
		int rc = fseek(file, 0, SEEK_END);
		if(rc == 0)
		{
			size_t size = (size_t)ftell(file);
			rewind(file);
			data = malloc(sizeof(char) * size + 1);
			if(data)
			{
				if(fread(data, size, 1, file) > 0)
				{
					if(data[size] != '\0') data[size] = '\0';
				}
				else
				{
					log_error("io:file_read", "fread failed");
					free(data);
				}
			}
			else
			{
				log_error("io:file_read", "malloc failed");
			}
		}
		else
		{
			log_error("io:file_read", "fseek failed");
		}
		fclose(file);
	}
	else
	{
		log_error("io:file_read", "File '%s' not found", relative_path);
	}

	free(relative_path);
	return data;
}

FILE* io_file_open(const char* path, const char* mode)
{
	char* relative_path = str_new(base_assets_path);
	relative_path = str_concat(relative_path, path);
	FILE* file = fopen(relative_path, mode);
	if(!file) log_error("io:file", "Fialed to open file '%s'", relative_path);
	return file;
}