/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   parse_pipelines.c                                  :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/02/21 13:13:58 by khais             #+#    #+#             */
/*   Updated: 2025/02/24 17:22:54 by khais            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "../src/parser/pipeline/pipeline.h"
#include "../src/parser/wordsplit/wordsplit.h"
#include "../src/ft_errno.h"
#include <assert.h>
#include "ft_printf.h"
#include "libft.h"
#include "unistd.h"
#include <limits.h>

static t_pipeline	*parse_pipeline(char *input)
{
	t_wordlist	*words = minishell_wordsplit(input);
	t_pipeline	*pipeline = pipeline_from_wordlist(words);
	return (pipeline);
}

static void	assert_pipeline_cmd_word(t_pipeline *pipeline, char *expected_word, int cmd_num, int word_num)
{
	if (pipeline->num_cmd <= cmd_num)
	{
		ft_dprintf(STDERR_FILENO, "expected pipeline %p to have at least %d cmds, but got %d\n", pipeline, cmd_num + 1, pipeline->num_cmd);
		assert(false);
	}
	ft_dprintf(STDERR_FILENO, "for pipeline %p cmd %d word %d, expected '%s', and got ", pipeline, cmd_num, word_num, expected_word);
	assert(pipeline->cmds[cmd_num] != NULL && "null cmd at that location");
	char	*got_word = wordlist_get(pipeline->cmds[cmd_num]->words, word_num)->word;
	ft_dprintf(STDERR_FILENO,  "'%s'\n", got_word);
	assert(expected_word == got_word || ft_strncmp(expected_word, got_word, INT_MAX) == 0);
}

static void	test_parse_empty_pipeline(void)
{
	t_pipeline	*pipeline = parse_pipeline("");
	assert(pipeline == NULL);
	pipeline_destroy(pipeline);
}

static void	test_parse_pipeline_single_cmd(void)
{
	t_pipeline	*pipeline = parse_pipeline("echo hello world");
	assert(pipeline->num_cmd == 1);
	assert_pipeline_cmd_word(pipeline, "echo", 0, 0);
	assert_pipeline_cmd_word(pipeline, "hello", 0, 1);
	assert_pipeline_cmd_word(pipeline, "world", 0, 2);
	pipeline_destroy(pipeline);
}

static void	test_parse_pipeline_two_cmd(void)
{
	t_pipeline	*pipeline = parse_pipeline("echo hello world | tee output.txt");
	assert_pipeline_cmd_word(pipeline, "echo", 0, 0);
	assert_pipeline_cmd_word(pipeline, "hello", 0, 1);
	assert_pipeline_cmd_word(pipeline, "world", 0, 2);
	assert_pipeline_cmd_word(pipeline, "tee", 1, 0);
	assert_pipeline_cmd_word(pipeline, "output.txt", 1, 1);
	pipeline_destroy(pipeline);
}

static void	test_parse_pipeline_three_cmd(void)
{
	t_pipeline	*pipeline = parse_pipeline("echo hello world | tee output.txt | cat -e");
	assert_pipeline_cmd_word(pipeline, "echo", 0, 0);
	assert_pipeline_cmd_word(pipeline, "hello", 0, 1);
	assert_pipeline_cmd_word(pipeline, "world", 0, 2);
	assert_pipeline_cmd_word(pipeline, "tee", 1, 0);
	assert_pipeline_cmd_word(pipeline, "output.txt", 1, 1);
	assert_pipeline_cmd_word(pipeline, "cat", 2, 0);
	assert_pipeline_cmd_word(pipeline, "-e", 2, 1);
	pipeline_destroy(pipeline);
}

static void	test_parse_pipeline_four_cmd(void)
{
	t_pipeline	*pipeline = parse_pipeline("echo hello world | tee output.txt | cat -e | hexdump -C");
	assert_pipeline_cmd_word(pipeline, "echo", 0, 0);
	assert_pipeline_cmd_word(pipeline, "hello", 0, 1);
	assert_pipeline_cmd_word(pipeline, "world", 0, 2);
	assert_pipeline_cmd_word(pipeline, "tee", 1, 0);
	assert_pipeline_cmd_word(pipeline, "output.txt", 1, 1);
	assert_pipeline_cmd_word(pipeline, "cat", 2, 0);
	assert_pipeline_cmd_word(pipeline, "-e", 2, 1);
	assert_pipeline_cmd_word(pipeline, "hexdump", 3, 0);
	assert_pipeline_cmd_word(pipeline, "-C", 3, 1);
	pipeline_destroy(pipeline);
}

static void	test_parse_pipeline_double_pipe_rejected(void)
{
	ft_errno(FT_ESUCCESS);
	assert(parse_pipeline("echo hello | | tee output.txt") == NULL);
	assert(ft_errno_get() == FT_EUNEXPECTED_PIPE);
}

static void	test_parse_pipeline_triple_pipe_rejected(void)
{
	ft_errno(FT_ESUCCESS);
	assert(parse_pipeline("echo hello | | | tee output.txt") == NULL);
	assert(ft_errno_get() == FT_EUNEXPECTED_PIPE);
}

static void	test_parse_pipeline_pipe_at_start_rejected(void)
{
	ft_errno(FT_ESUCCESS);
	assert(parse_pipeline("| echo hello | tee output.txt") == NULL);
	assert(ft_errno_get() == FT_EUNEXPECTED_PIPE);
}

static void	test_parse_pipeline_pipe_at_end_rejected(void)
{
	ft_errno(FT_ESUCCESS);
	assert(parse_pipeline("echo hello | tee output.txt |") == NULL);
	assert(ft_errno_get() == FT_EUNEXPECTED_PIPE);
}

int	main(void)
{
	test_parse_empty_pipeline();
	test_parse_pipeline_single_cmd();
	test_parse_pipeline_two_cmd();
	test_parse_pipeline_three_cmd();
	test_parse_pipeline_four_cmd();
	test_parse_pipeline_double_pipe_rejected();
	test_parse_pipeline_triple_pipe_rejected();
	test_parse_pipeline_pipe_at_start_rejected();
	test_parse_pipeline_pipe_at_end_rejected();
	return (0);
}