#define _POSIX_C_SOURCE 200809L
#include "execution.h"

#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include "../expansion/expansion.h"
#include "../utils/ast/ast.h"
#include "../utils/hash_map/hash_map.h"

// Refactored: delegates to helpers in execution_helpers.c
#include "execution_helpers.h"

int execution(struct ast *ast, struct hash_map *vars)
{
    if (!ast)
        return 0;

    switch (ast->type)
    {
    case AST_VOID:
    case AST_END:
        return 0;
    case AST_CMD: {
        struct ast_command *command = ast_get_command(ast);
        if (!expand(command, vars))
            fprintf(stderr, "Error: Variable expansion failed\n");

        return exec_ast_command(command, vars);
    }
    case AST_IF:
        return exec_ast_if(ast_get_if(ast), vars);
    case AST_LIST:
        return exec_ast_list(ast_get_list(ast), vars);
    case AST_AND_OR:
        return exec_ast_and_or(ast_get_and_or(ast), vars);
    default:
        return 127;
    }
}