/*
Copyright (c) 2012 Daniele Bartolini, Simone Boscaratto

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*/

#include <stdio.h>
#include <stdlib.h>

#include "Crown.h"
#include "TXTCompiler.h"

using namespace crown;

const char* root_path = NULL;
const char* dest_path = NULL;
const char* resource_in = NULL;
uint32_t hash_seed = 0;

void print_help_message(const char* program_name);
void parse_command_line(int argc, char** argv);

/// UTF-8 compiler for "txt" resource types
int main(int argc, char** argv)
{
	parse_command_line(argc, argv);

	if (root_path == NULL)
	{
		printf("%s: ERROR: you have to specify the root path with `--root-path`\n", argv[0]);
		exit(-1);
	}

	if (dest_path == NULL)
	{
		printf("%s: ERROR: you have to specify the destination path with `--dest-path`\n", argv[0]);
		exit(-1);
	}

	if (resource_in == NULL)
	{
		printf("%s: ERROR: you have to specify the resource name with `--resource-in`\n", argv[0]);
		exit(-1);
	}
	
	// FIXME: validate input

	TXTCompiler compiler(root_path, dest_path, resource_in, hash_seed);

	if (compiler.compile() == false)
	{
		printf("%s: ERROR: compilation failed for resource %s\n", argv[0], compiler.resource_path());
		exit(-1);
	}

	compiler.write();

	return 0;
}

void parse_command_line(int argc, char** argv)
{
	// Parse arguments
	ArgsOption options[] = 
	{
		"help",         AOA_NO_ARGUMENT,       NULL,        'h',
		"root-path",    AOA_REQUIRED_ARGUMENT, NULL,        'r',
		"dest-path",    AOA_REQUIRED_ARGUMENT, NULL,        'd',
		"resource-in",  AOA_REQUIRED_ARGUMENT, NULL,        'i',
		"seed",         AOA_REQUIRED_ARGUMENT, NULL,        's',
		NULL, 0, NULL, 0
	};

	Args args(argc, argv, "", options);

	while (1)
	{
		int32_t ret = args.next_option();
		
		switch (ret)
		{
			case -1:
			{
				return;
			}
			// Help message
			case 'h':
			{
				print_help_message(argv[0]);
				exit(0);
			}
			// Root path
			case 'r':
			{
				if (args.option_argument() == NULL)
				{
					printf("%s: ERROR: missing path after `--root-path`\n", argv[0]);
					exit(-1);
				}
				
				root_path = args.option_argument();
				
				break;
			}
			// Dest path
			case 'd':
			{
				if (args.option_argument() == NULL)
				{
					printf("%s: ERROR: missing path after `--dest-path`\n", argv[0]);
					exit(-1);
				}
				
				dest_path = args.option_argument();
				
				break;
			}
			// Resource in
			case 'i':
			{
				if (args.option_argument() == NULL)
				{
					printf("%s: ERROR: missing path after `--resource-in`\n", argv[0]);
					exit(-1);
				}
				
				resource_in = args.option_argument();
				
				break;
			}
			case 's':
			{
				if (args.option_argument() == NULL)
				{
					printf("%s: ERROR: missing seed value after `--seed`\n", argv[0]);
					exit(-1);
				}

				hash_seed = atoi(args.option_argument());

				break;
			}
			default:
			{
				break;
			}
		}
	}
}

void print_help_message(const char* program_name)
{
	printf("Usage: %s [options]\n", program_name);
	printf("Options:\n\n");

	printf("  --help                  Show this help.\n");
	printf("  --root-path <path>      The _absolute_ <path> whether to look for the input resource.\n");
	printf("  --dest-path <path>      The _absolute_ <path> whether to put the compiled resource.\n");
	printf("  --resource-in <path>    The _relative_ <path> of the input resource.\n");
	printf("  --seed <value>          The unsigned integer <value> of the hash seed.\n");
}