/**
 * @file		Model-Extractor.c
 * @date		25/07/2022
 * @author		JackCarterSmith
 * @copyright	GPL-v3.0
 * @brief		HOB model parser and export to Waveform OBJ format.
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(_WIN32)
	#include <windows.h>
#else
	#include <sys/types.h>
	#include <sys/stat.h>
#endif
#include "config.h"
#include "options.h"
#include <RSPModel.h>
#include <RSPModel_errordefs.h>
#include "obj_exporter.h"



/*
 * Internal functions declarations
 */

static unsigned int mainProcess(int args_cnt, char* args_value[], T_PROG_OPTIONS* opt_ptr);
static void createSubDir(char *dirName);
static unsigned char checkInputArgs(T_PROG_OPTIONS* opt_ptr, int p_arg_nbr, char* p_args[]);
static void cleanUpMemory(T_RSPMODEL_HOB* hobStruct);
static void dispHelp();


/*
 * - MAIN -
 */
int main(int argc, char *argv[]) {
	T_PROG_OPTIONS _opts;
	unsigned char p;

	// Hello world!
	printf("\n*** RogueSquadron Extractor (RSE) - MODEL module - v%s ***\n", RSPModel_getVersion());

	// Check for arguments
	if (argc < 2) {
		printf("\n[ERR] No input file/commands specified!\n");
		dispHelp();
		return RSPLIB_ERROR_ARGS_NULL;
	}

	// Create options for programs according to user's arguments.
	p = checkInputArgs(&_opts, argc, argv);
	if ( p == RSPLIB_ERROR_GENERIC ) return RSPLIB_SUCCESS;
	else if ( p != RSPLIB_SUCCESS ) return p;

	return mainProcess(argc, argv, &_opts);
}


/*
 * Private functions definition
 */

static unsigned int mainProcess(int args_cnt, char* args_value[], T_PROG_OPTIONS* p_opts) {
	unsigned short file_index;
	T_RSPMODEL_HOB* hobStruct = NULL;
	int i;

	// Manage multiple inputs files
	for ( file_index = p_opts->input_files_cnt; file_index < args_cnt; file_index++)
	{
		printf("\n=============================================\n[INFO] - Parsing file: %s ...\n", args_value[file_index]);
		hobStruct = calloc(1, sizeof(T_RSPMODEL_HOB));
		// Parse data from HOB file and put in T_HOB structure.
		if (RSPModel_processHOBFile(hobStruct, args_value[file_index]) != RSPLIB_SUCCESS) {
			printf("[ERR] Failed to parse datas from %s\n", args_value[file_index]);
			free(hobStruct);
			return RSPLIB_ERROR_PROCESS;
		}

		if (hobStruct->obj_count > 0) {
			if (p_opts->output_dir) createSubDir(args_value[file_index]);

			for ( i = 0; i < hobStruct->obj_count; i++ ) {
				if (exportOBJModel(&(hobStruct->objects[i]), args_value[file_index], p_opts) != RSPLIB_SUCCESS)
					printf("[ERR] Failed to export %s object in OBJ format!\n", hobStruct->objects[i].name);
				else
					printf("[INFO] Successfully exported %s object in OBJ format.\n", hobStruct->objects[i].name);
			}
		}
	}

	cleanUpMemory(hobStruct);

	return RSPLIB_SUCCESS;
}

static unsigned char checkInputArgs(T_PROG_OPTIONS* opt_ptr, int p_arg_nbr, char* p_args[]) {
	char test[256];
	int i;

	// Set default options
	opt_ptr->raw = 0;
	opt_ptr->output_dir = 1;

	if (p_arg_nbr > 1) {
		for ( i = 1; i < p_arg_nbr; i++) {
			strcpy(test, p_args[i]);
			if (p_args[i][0] != '-') break;
			if (strcmp(p_args[i], "-h") == 0) {
				dispHelp();
				return RSPLIB_ERROR_GENERIC;
			} else if (strcmp(p_args[i], "-v") == 0) {
				opt_ptr->verbose_mode = 1;
				printf("[OPTN] Verbose enabled.\n");
			} else if (strcmp(p_args[i], "-vv") == 0) {
				opt_ptr->verbose_mode = 1;
				opt_ptr->debug_mode = 1;
				printf("[OPTN] Debug enabled.\n");
			} else if (strcmp(p_args[i], "-vvv") == 0) {
				opt_ptr->verbose_mode = 1;
				opt_ptr->debug_mode = 1;
				opt_ptr->god_mode = 1;
				printf("[OPTN] God damn it!\n");
			} else if (strcmp(p_args[i], "-no-subdir") == 0) {
				opt_ptr->output_dir = 0;
				printf("[OPTN] Export to current directory.\n");
			} else if (strcmp(p_args[i], "-mtl") == 0) {
				opt_ptr->export_mtl = 0;
				printf("[OPTN] Export materials datas.\n");
			} else {
				printf("[ERR] Unknown option: %s\n", p_args[i]);
			}
		}

		opt_ptr->input_files_cnt = i;
		return RSPLIB_SUCCESS;
	}

	return RSPLIB_ERROR_ARGS_NULL;
}

static void createSubDir(char *dirName) {
	if (dirName == NULL) return;
	char _dir[260];				//TODO: Change directory management
	strcpy(_dir, dirName);
	strcat(_dir, "-out");

	#ifdef _WIN32
		CreateDirectory(_dir, NULL);
	#else
		mkdir(_dir, 0755);
	#endif
}

static void cleanUpMemory(T_RSPMODEL_HOB* hobStruct) {
	int i,j;

	for ( i=0; i<hobStruct->obj_count; i++ ) {
		for ( j=0; j<hobStruct->objects[i].face_group_count; j++ ) {

			free(hobStruct->objects[i].object_parts[j].faces);
			free(hobStruct->objects[i].object_parts[j].vertices);
		}

		free(hobStruct->objects[i].object_parts);
	}

	free(hobStruct->objects);
	free(hobStruct);
}

static void dispHelp() {
	printf("\n");
	printf("Options:\n	-h  Print this message\n");
	printf("	-v -vv 		Activate verbose console output\n");
	printf("	-no-subdir  Export models inside current folder\n");
	//printf("	-mtl  		Export materials datas with model\n");
	printf("\n");
	printf("Usage: RSE-Model_%s [options] <hob files...>\n", PRG_VERSION);
	printf("\n");
}