#ifndef AST_EXEC_FUNCTIONS_H
#define AST_EXEC_FUNCTIONS_H

#include "builtins/builtins.h"
#include "exec/ast_eval.h"

#define BASE_RW_SIZE 256

typedef int (*exec_f)(struct ast *ast);

/**
 * @brief Evaluates the given AST and return the exit code of it.
 * A command can be a shell builtin or an external binary file called with
 * `execvp`.
 * @param ast An `AST_COMMAND` AST to evaluate. It is given as a `struct ast*`
 * and uses inheritance-like principle.
 */
int exec_ast_command(struct ast *ast);

/**
 * @brief Evaluates the given AST and return the exit code of it.
 * It performs a lazy evaluation.
 * @param ast An `AST_LOGICAL` AST to evaluate. It is given as a `struct ast*`
 * and uses inheritance-like principle.
 */
int exec_ast_logical(struct ast *ast);

/**
 * @brief Evaluates the given AST and return the exit code of the last
 * `AST_COMMAND`.
 * @param ast An `AST_LIST` AST to evaluate. It is given as a `struct ast*`
 * and uses inheritance-like principle.
 */
int exec_ast_list(struct ast *ast);

/**
 * @brief Evaluates the given AST and return the exit code of it.
 * It performs a lazy evaluation.
 * @param ast An `AST_IF` AST to evaluate. It is given as a `struct ast*`
 * and uses inheritance-like principle.
 */
int exec_ast_if(struct ast *ast);

/**
 * @brief Evaluates the given AST and return the exit code of it.
 * It redirects the standard output of `ast->left` to the standard input of
 * `ast->right`.
 * @param ast An `AST_PIPELINE` AST to evaluate. It is given as a `struct ast*`
 * and uses inheritance-like principle.
 */
int exec_ast_pipe(struct ast *ast);

/**
 * @brief Evaluates the given AST and return the exit code of it.
 * It gets the redirection details from `ast->redir` which is a `struct
 * redirect`.
 * @param ast An `AST_REDIRECTION` AST to evaluate. It is given as a `struct
 * ast*` and uses inheritance-like principle.
 */
int exec_ast_redirection(struct ast *ast);

int exec_ast_while(struct ast *ast);

int exec_ast_assign(struct ast *ast);

int exec_ast_for(struct ast *ast);

/**
 * @brief Evaluates the given AST and return the exit code of it.
 * It gets the ast corresponding to the subshell and executes it in a new
 * environment thanks to the fork(2) function.
 * @param ast An `AST_SUBSHELL` AST to evaluate It is given as a `struct ast*`
 * and uses inheritance-like principle.
 */
int exec_ast_subshell(struct ast *ast);

#endif /* ! AST_EXEC_FUNCTIONS_H */